CN115099624A - Multi-attribute decision-making system based on intuition fuzzy entropy and interval fuzzy entropy - Google Patents
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Abstract
The invention discloses a multi-attribute decision making system based on intuitionistic fuzzy entropy and interval fuzzy entropy, which comprises a decision information acquisition module, a fuzzy entropy calculation module and a decision result generation module; the decision information acquisition module is used for acquiring a plurality of decision information matrixes of the target and transmitting the decision information matrixes to the fuzzy entropy calculation module; the fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module; and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix. The hesitation information entropy expected by mathematics provided by the patent is very effective in practical application, and the difference between the entropy and the entropy added with the traditional fuzzy entropy and the standard deviation is very small.
Description
Technical Field
The invention relates to the field of multi-attribute decision making, in particular to a multi-attribute decision making system based on intuitionistic fuzzy entropy and interval fuzzy entropy.
Background
The concept of interval intuitive fuzzy sets was first proposed by ataanassov. The method is characterized in that a certain object is difficult to be depicted by a certain precise value in consideration of the characteristics of complexity and uncertainty of the object and the limitation of the cognitive level of people, and interval values can more flexibly process the complex objects, so that the concept of interval intuitive fuzzy sets is provided. Since then, the interval intuitive fuzzy set is widely applied to the fields of scheme decision, image processing, machine learning, logic planning and the like. The key problems of the interval intuitive fuzzy set applied in scheme decision are mainly divided into 2 categories:
the first category of problems with attribute weight determination: the solution is divided into 3 types, one is about the case that the attribute weight of the solution is known, the other is about the case that the attribute weight is partially known, and the last is about the preference problem of the solution in the case that the attribute weight is completely unknown. Aiming at the interval fuzzy multi-attribute decision problem with completely unknown attribute weight, an optimal scheme is obtained mainly by establishing a linear programming model and a fuzzy entropy weight method.
In the second category of sorting problem of the number of intervals, Pavel takes the median point of the number of intervals as a sorting basis, and although the calculation amount is small, the median point cannot sufficiently reflect the characteristics of the number of intervals, and much information is lost. The integrated method of the Xuezui for interval intuition and fuzziness is researched, a score function and an accurate function are defined, and the method is applied to the field of decision making. However, the scoring function does not take the hesitation into account, and therefore inaccurate or even misjudgment of the ordering may occur when the patterns are ordered. The bamboo Wen starts from the geometric meaning of interval intuitive fuzzy numbers, proposes a scoring function containing parameters, but the value of the parameters is generally fixed to 0.5, resulting in that the value of the scoring function only depends on the upper interval of membership and non-membership, thereby losing the information of the lower interval. Aiming at the problem that the scoring function described above cannot correctly sort some interval numbers, the invention provides a new scoring function by comprehensively considering the influence of the membership degree of an interval intuitive fuzzy number, the absolute difference value of non-membership degree, useful information and abstaining right information on decision making, and can solve the limitation of the previous scoring function. However, there is still a problem of sequencing failure for some number of intervals.
Thus, the characterization and quantification of ambiguity is an important issue in many system models and designs affecting uncertainty metrics.
Disclosure of Invention
The invention aims to provide a multi-attribute decision system based on intuition fuzzy entropy and interval fuzzy entropy, which comprises a decision information acquisition module, a fuzzy entropy calculation module and a decision result generation module;
the decision information acquisition module is used for acquiring a plurality of decision information matrixes of targets (such as optimal sequencing of ecological agricultural areas and the like) and transmitting the decision information matrixes to the fuzzy entropy calculation module;
the fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module;
and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix.
Preferably, the decision information matrix is denoted as R i (u jk ) (ii) a i represents the number of decision makers, j represents the evaluation number, and k represents the benefit number;
the fuzzy entropy calculation module is used for determining a decision information matrix R i (u jk ) The step of processing to obtain the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient comprises the following steps:
1) calculating the expectation and standard deviation of the hesitation degree of the decision maker and the expectation and variance of the hesitation degree of the benefit attribute of each decision information matrix;
wherein the desired vector is noted asThe vector of standard deviations is denoted S k (π i (X))={S(π 1 (X)),S(π 2 (X)) }, k ═ 1, 2; k-1 represents the expert hesitation degree, and k-2 represents the benefit attribute hesitation degree;
2) respectively inputting the respective expectation and standard deviation of the hesitation degree and the benefit attribute weight of the decision maker into a fuzzy entropy calculation model, and calculating a fuzzy entropy;
the fuzzy entropy calculation model is stored in a decision maker hesitation degree weight coefficient and benefit attribute weight coefficient calculation module;
3) establishing a decision maker hesitation degree weight r ij The formula is calculated, namely:
wherein (E) 1 ) ij Representing fuzzy entropy corresponding to the hesitation degree of the decision maker;
4) according to the data of the formula (1), calculating a hesitation degree weight coefficient matrix of each decision maker, namely:
in the formula, r 4n Representing a hesitation degree weight coefficient of the decision maker;
5) establishing a benefit attribute weight coefficient w ij The calculation formula, namely:
wherein i represents a method, and k represents the number of benefit attributes; (E) 2 ) ij Representing fuzzy entropy corresponding to the benefit attribute;
6) according to the data of the formula (2), calculating to obtain a hesitation degree weight coefficient matrix of each benefit attribute, namely:
in the formula, w 4k And a hesitation degree weight coefficient representing the benefit attribute.
Preferably, the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, which are respectively as follows:
in the formula,respectively outputting 4 intuitive fuzzy entropy calculation submodels; hesitation degree pi of fuzzy set A at point x A (x)=1-u A (x)-ν A (x);μ A (x):X→[0,1],ν A (x):X→[0,1]Respectively representing the membership degree and the non-membership degree of the fuzzy set A; e f (A) A distance representing a degree of membership and a degree of non-membership; s (pi) A (X)) is a hesitation degree pi A (x) Standard deviation of (2).
Preferably, the hesitation degree intuitive fuzzy entropy and the benefit attribute intuitive fuzzy entropy of the decision maker are as follows:
preferably, when the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
in the formula of lambda i Is a weight vector; r i (u jk ) Is decision information.
Preferably, the fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, which are respectively as follows:
in the formula,respectively calculating the output of the submodels for the 4 intervals of fuzzy entropy;distances representing degrees of membership and non-degrees of membership; degree of hesitation of intervalSuperscript U, L represents an upper triangular matrix and a lower triangular matrix, respectively; is degree of hesitation of intervalDegree of hesitation of intervalStandard deviation of (2).
Preferably, the intuitional fuzzy entropy of the decision maker hesitation degree interval and the intuitional fuzzy entropy of the benefit attribute are as follows:
preferably, when the interval fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
Preferably, the decision information is obtained by expert experience.
Preferably, the system also comprises a database for storing data of the decision information acquisition module, the fuzzy entropy calculation module and the decision result generation module.
The technical effect of the invention is needless to say, the patent establishes several general frameworks about the entropy of the Intuitive Fuzzy Sets (IFSs) and the interval intuitive fuzzy sets (IVIFSs), the frameworks mainly comprise two parts of fuzzy entropy and probability information entropy, and theoretical proofs are given.
This patent provides new decision-making system to current decision-making system's limitation, has solved some problems that exist on the multi-objective selection, if: the subjectivity is too high, and sometimes a user only selects the target according to the impression of the target, and a set of objective evaluation system is not established; the weight of the evaluation factors is difficult to determine, and the importance degree of each evaluation factor is different when the target is selected, so that the user has a correct measurement rule for the weight of each index;
the invention considers the random uncertainty of different experts in scoring the same target, provides an improved multi-attribute decision-making system based on intuition fuzzy entropy and interval fuzzy entropy, can correctly and reasonably calculate the weight of each index attribute, reduces the influence of the uncertainty on the decision-making result to a certain extent, and provides a more accurate scheme for multi-target selection.
Experimental results show that the hesitation information entropy expected by mathematics provided by the patent is very effective in practical application, and the difference between the entropy and the entropy added with the traditional fuzzy entropy and the standard deviation is very small.
Drawings
Fig. 1 is an information acquisition function for uncertainty of information.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1, a multi-attribute decision system based on intuitive fuzzy entropy and interval fuzzy entropy includes a decision information obtaining module, a fuzzy entropy calculating module, and a decision result generating module;
the system is used for carrying out optimal sequencing on the ecological agriculture area.
The decision information acquisition module is used for acquiring a plurality of decision information matrixes of the target and transmitting the decision information matrixes to the fuzzy entropy calculation module; the target includes a number of ecological agricultural zones to be selected.
The fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module;
and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix.
The decision information matrix is marked as R i (u jk ) (ii) a i represents the number of decision makers, j represents the evaluation number, and k represents the benefit number;
the fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and the method comprises the following steps:
1) calculating the expectation and standard deviation of the hesitation degree of the decision maker and the expectation and variance of the hesitation degree of the benefit attribute of each decision information matrix;
wherein the desired vector is noted asThe vector of standard deviations is denoted S k (π i (X))={S(π 1 (X)),S(π 2 (X)),...,S(π n (X)) }, k ═ 1, 2; n is the dimension of the decision information matrix; k-1 represents the hesitation degree of the expert, and k-2 represents the hesitation degree of the benefit attribute;
2) inputting respective expectation and standard deviation of the hesitation degree and benefit attribute weight of the decision maker into a fuzzy entropy calculation model, and calculating fuzzy entropy
The fuzzy entropy calculation model is stored in a decision maker hesitation degree weight coefficient and benefit attribute weight coefficient calculation module;
3) establishing a decision maker hesitation degree weight r ij The calculation formula, namely:
wherein (E) 1 ) ij Representing fuzzy entropy corresponding to the hesitation degree of the decision maker;
4) according to the data of the formula (1), calculating to obtain a hesitation degree weight coefficient matrix of each decision maker, namely:
in the formula, r 4n Representing a hesitation degree weight coefficient of the decision maker;
5) establishing a benefit attribute weight coefficient w ij The calculation formula, namely:
wherein i represents a method, and k represents the number of benefit attributes; (E) 2 ) ij Representing fuzzy entropy corresponding to the benefit attribute;
6) according to the data of the formula (2), calculating to obtain a hesitation degree weight coefficient matrix of each benefit attribute, namely:
in the formula, w 4k And a hesitation degree weight coefficient representing the benefit attribute.
The fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels which are respectively as follows:
in the formula,respectively outputting 4 intuitive fuzzy entropy calculation submodels; hesitation degree pi of fuzzy set A at point x A (x)=1-u A (x)-ν A (x);μ A (x):X→[0,1],ν A (x):X→[0,1]Respectively representing the membership degree and the non-membership degree of the fuzzy set A; e f (A) A distance representing a degree of membership and a degree of non-membership; s (pi) A (X)) is a hesitation degree pi A (x) Standard deviation of (2).
The intuitive fuzzy entropy of the hesitation degree and the intuitive fuzzy entropy of the benefit attribute of the decision maker are as follows:
when the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
in the formula, λ i Is a weight vector; r is i (u jk ) Is decision information.
The decision information is obtained by an expert experience method.
The system also comprises a database used for storing data of the decision information acquisition module, the fuzzy entropy calculation module and the decision result generation module.
Example 2:
a multi-attribute decision system based on intuition fuzzy entropy and interval fuzzy entropy comprises a decision information acquisition module, a fuzzy entropy calculation module and a decision result generation module;
the decision information acquisition module is used for acquiring a plurality of decision information matrixes of targets (such as optimal sequencing of ecological agricultural areas) and transmitting the decision information matrixes to the fuzzy entropy calculation module;
the fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module;
and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix.
The step that the interval fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient comprises the following steps:
1) calculating the expectation and standard deviation of the hesitation degree of the decision maker and the expectation and variance of the hesitation degree of the benefit attribute of each decision information matrix;
wherein the desired vector is noted asThe vector of standard deviations is denoted S k (π i (X))={S(π 1 (X)),S(π 2 (X)),...,S(π n (X)) }, k ═ 1, 2; n is the dimension of the decision information matrix; k-1 represents the expert hesitation degree, and k-2 represents the benefit attribute hesitation degree;
2) inputting respective expectation and standard deviation of the hesitation degree and benefit attribute weight of the decision maker into a fuzzy entropy calculation model, and calculating fuzzy entropy
The interval fuzzy entropy calculation model is stored in a decision maker hesitation degree weight coefficient and benefit attribute weight coefficient calculation module;
3) establishing a decision maker hesitation degree weight r ij The calculation formula, namely:
wherein i represents the decision information of the decision maker, and j represents the number of the decision maker;
4) according to the data of the formula (1), calculating a hesitation degree weight coefficient matrix of each decision maker, namely:
5) establishing a benefit attribute weight coefficient w ij The calculation formula, namely:
wherein i represents a method, and k represents the number of benefit attributes;
6) according to the data of the formula (2), calculating to obtain a hesitation degree weight coefficient matrix of each benefit attribute, namely:
the fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels which are respectively as follows:
in the formula,respectively calculating the output of the submodels for the 4 intervals of fuzzy entropy;distances representing degrees of membership and non-degrees of membership; degree of hesitation of intervalSuperscript U, L represents upper triangular matrix and lower triangular matrix, respectively; is degree of hesitation of intervalDegree of hesitation of intervalStandard deviation of (2).
The intuitive fuzzy entropy of the hesitation degree and the intuitive fuzzy entropy of the benefit attribute of the decision maker are as follows:
when the interval fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
The decision information is obtained by an expert experience method.
The system also comprises a database used for storing data of the decision information acquisition module, the fuzzy entropy calculation module and the decision result generation module.
Example 3:
a multi-attribute decision system based on intuition fuzzy entropy and interval fuzzy entropy comprises a decision information acquisition module, a fuzzy entropy calculation module and a decision result generation module;
the decision information acquisition module is used for acquiring a plurality of decision information matrixes of targets (such as optimal sequencing of ecological agricultural areas and the like) and transmitting the decision information matrixes to the fuzzy entropy calculation module;
the fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module;
and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix.
The decision information matrix is marked as R i (u jk ) (ii) a i represents the number of decision makers, j represents the evaluation number, and k represents the benefit number;
the fuzzy entropy calculation module is used for determining a decision information matrix R i (u jk ) The step of processing to obtain the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient comprises the following steps:
1) calculating the expectation and standard deviation of the hesitation degree of the decision maker and the expectation and variance of the hesitation degree of the benefit attribute of each decision information matrix;
wherein the desired vector is noted asThe vector of standard deviations is denoted S k (π i (X))={S(π 1 (X)),S(π 2 (X)) }, k ═ 1, 2; k-1 represents the hesitation degree of the expert, and k-2 represents the hesitation degree of the benefit attribute;
2) respectively inputting the respective expectation and standard deviation of the hesitation degree and the benefit attribute weight of the decision maker into a fuzzy entropy calculation model, and calculating a fuzzy entropy;
the fuzzy entropy calculation model is stored in a decision maker hesitation degree weight coefficient and benefit attribute weight coefficient calculation module;
3) establishing a decision maker hesitation degree weight r ij Formula for calculationNamely:
wherein (E) 1 ) ij Representing fuzzy entropy corresponding to the hesitation degree of the decision maker;
4) according to the data of the formula (1), calculating to obtain a hesitation degree weight coefficient matrix of each decision maker, namely:
in the formula, r 4n Representing a hesitation degree weight coefficient of the decision maker;
5) establishing a benefit attribute weight coefficient w ij The calculation formula, namely:
wherein i represents a method, and k represents the number of benefit attributes; (E) 2 ) ij Representing fuzzy entropy corresponding to the benefit attribute;
6) according to the data of the formula (2), calculating to obtain a hesitation degree weight coefficient matrix of each benefit attribute, namely:
in the formula, w 4k And a hesitation degree weight coefficient representing the benefit attribute.
The fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels which are respectively as follows:
in the formula,respectively outputting 4 intuitive fuzzy entropy calculation submodels; hesitation degree pi of fuzzy set A at point x A (x)=1-u A (x)-ν A (x);μ A (x):X→[0,1],ν A (x):X→[0,1]Respectively representing the membership degree and the non-membership degree of the fuzzy set A; e f (A) A distance representing a degree of membership and a degree of non-membership; s (Pi) A (X)) is a hesitation degree pi A (x) Standard deviation of (2).
The intuitive fuzzy entropy of the hesitation degree and the intuitive fuzzy entropy of the benefit attribute of the decision maker are as follows:
when the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
in the formula, λ i Is a weight vector; r i (u jk ) Is decision information.
The fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels which are respectively as follows:
in the formula,respectively calculating the output of the submodels for the 4 intervals of fuzzy entropy;a distance representing a degree of membership and a degree of non-membership; degree of hesitation of intervalSuperscript U, L represents an upper triangular matrix and a lower triangular matrix, respectively; is degree of interval hesitationDegree of hesitation of intervalStandard deviation of (2).
The intuitionistic fuzzy entropy of the decision maker hesitation degree interval and the intuitionistic fuzzy entropy of the benefit attribute are as follows:
when the interval fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrix is as follows:
The decision information is obtained by expert experience.
The system also comprises a database used for storing data of the decision information acquisition module, the fuzzy entropy calculation module and the decision result generation module.
Example 4:
a multi-attribute decision-making system based on intuition fuzzy entropy and interval fuzzy entropy is disclosed in an embodiment 1, wherein the basic theory is as follows:
1) background of the theory
Definition 1.A is an intuitive fuzzy set A-IFS, any element X ∈ X in A having the form: a ═ tone<x,u A (x),v A (x))|x∈X}
Wherein: mu.s A (x):X→[0,1],ν A (x):X→[0,1]And 0 is less than or equal to mu A (x)+v A (x)≤1,Which represent the degree of membership and the degree of non-membership of the fuzzy set a, respectively.
Another parameter in the intuitive blur set A (x)=1-u A (x)-v A (x) X ∈ X, which indicates the hesitation of a at point X, and, obviously,0≤π A (x) Less than or equal to 1, when pi A (x) When 0, the intuitive blur set degenerates into a blur set.
For any two intuitive fuzzy sets A in X 1 And A 2 The following definitions are provided:
As an important metric for the Intuitive Fuzzy Set (IFS), A 1 ,A 2 ∈IFS,X={x i 1,2, …, n, Szmidt defines Hamming distances as follows:
Its interval hesitation degree is expressed asAnd is provided with For convenience, this is expressed as follows: and, to
Similarly, for any two intervals belonging to X, the fuzzy set is intuitiveNamely, it isThis example is defined as follows:
the embodiment redefines the axiom of A-IFSs:
definition 3. a real function E: ifs (x) → [0, 1], e (a) is referred to as an entropy on ifs (x) if it satisfies the following properties:
(F1) e (a) ═ 0 if and only if a is a distinct set;
(E3) E (A). ltoreq.E (B) if A has less ambiguity than B, that is:
if it isThen pairHas u B (x i )≤v B (x i ),π A (x)≤π B (x) Or ifThen pairHas u B (x i )≥v B (x i ),π A (x)≤π B (x);
(E4)E(A)=E(A C ).
Similarly, the axioms of A-IVIFSs are redefined:
definition 4. a real functionIVIFS(X)→[0,1],Referred to as an entropy on IVIFS (X) and satisfies the following properties:
If it is notRatio of degree of blur ofSmall, that is to say ifThen pairIs provided withAnd is provided with If it isThen pairIs provided with And is
2) Research foundation
To pairDocuments [4,10,11 ]]Some entropy models are proposed to measure the intuitive fuzzy sets under the condition of satisfying the definitions 3 and 4, and have different membership degrees and non-membership degrees especially under the condition of the same hesitation degree. Szmid [10,12 ]]Two non-probabilistic intuitive fuzzy entropies are proposed:
fuzzy entropy based on distance and hesitation degree including membership degree and non-membership degree: this entropy is applied to any element A of the fuzzy set i E IFSs (i ═ 1,2, …, n), which is defined as follows:
equation (5) defines one element x in the fuzzy set i For any set A in the fuzzy set i ε IFS (X), which is expressed as follows:
but the entropy (7) is withinThe A-IFSs are degraded without satisfying definition (3). Thus, entropy is proposed
Then, a new interval intuitive fuzzy entropy is provided, and an interval intuitive fuzzy setIs provided with
3) several general frameworks for the measurement of intuitive fuzzy sets and Interval intuitive fuzzy sets
A new entropy model is provided for the intuitive fuzzy entropy and the interval intuitive fuzzy entropy, and the new entropy model comprises the combination of membership degree, the distance between the membership degree and the non-membership degree and the hesitation degree. However, it does not reflect the probabilistic numerical characteristic of the hesitation degree and the information characteristic of the hesitation degree. For example, one metric may be used in multi-attribute decision making (MADM), with the score of each expert having a little randomness when many experts evaluate alternatives. His hesitation can be seen as a random variable. How does this randomness be expressed? This embodiment may be reflected in the mathematical expectation and variance of hesitations. As can be seen from the information entropy model, the larger the hesitation degree is, the more information is reflected by the information entropy, so that it can be reflected by the information entropy. Therefore, the study of the uncertainty (PI, II) caused by non-ambiguity is important. In general, a robust system should contain all three (FI, PI, and II) types of uncertainty.
3.1) intuitive fuzzy entropy measure
This embodiment proposes several new fuzzy set metric frameworks that contain the three above-mentioned uncertainty metrics for humans, the model is as follows:
where A ∈ IFSs, E in the formula (11-13) f (A) Represents a fuzzy entropy measure which is mainly measured by the distance between membership and non-membership. Such as: e f (A) Can be represented by the following model:
is defined as:
the model is as follows:
the entropy is:
e in the formula (11-13) pi (A) The entropy is represented including the probability uncertainty (PI) and the information uncertainty (II) of the hesitation. Pi A (x i ),x i epsilon.A denotes that A is in x i Degree of hesitation of, pi A (x i ) Can be regarded as a sample value of A and it corresponds to entropy E pi (A) Can be influenced by pi A (x i ) Mathematical expectation ofAnd standard deviation S (pi) A (X)) are measured, and their calculation formula is as follows:
In combination with the definition of Shannon's information entropy:
p i by usingOr S (pi) A (X)) substituted, by definition, whenOr S (pi) A (X)) should also increase monotonically, and the maximum value of entropy, max E (a) ═ 1, so this embodiment redefines the entropy function, ensuring that E (a) is a monotonically increasing function.The information entropy function is defined as:
f(x)=x(1-ln x) (21)
it is specified that 0 ln 0 is 0, and its function image is shown in fig. 1.
Based on the above analysis, the present embodiment proposes several entropy models that measure the intuitive blur set. To pairAs defined below:
in the formula E f (A) Can use E fzl (A),E fldl (A),E fzj (A),E fpp (A) And (4) performing isentropic expression.
And (3) proving that: the equations (22-25) are similar, and this example demonstrates (22). If it is notIs that of the intuitive fuzzy set, it should satisfy definition 3. Herein this example takes E f (A) Is an entropy of the fuzzy set, so it satisfies properties (E1) - (E4), as demonstrated primarily in the following example:
(E1) the method comprises the following steps If A is a distinct set, u A (x i )=1,v A (x i )=1,π A (x i ) Is equal to 0, and therefore hasS(π A (X)) ═ 0. Into equation (22) with E f (A)=0,I.e. with E pi (A) 0. On the other hand, if E fpi (A) 0, only when E f (A) 0 and E pi (A) Equal to 0, thereforeS(π A (X)) -0, so a is a distinct set.
(E2) The method comprises the following steps If u is A (x i )=v A (x i ) 0, then pi A (x i ) 1, then E f (A)=1,Thus E pi (A) Now suppose thatFrom the formula (22), easily obtained
Here E f (A) As 1, the present embodiment only needs to satisfySince each of f (x) and x (1-ln) is a monotonically increasing function, it is considered thatI.e. pi A (x i ) 1, so u A (x i )=v A (x i )=0,
(E3) The method comprises the following steps To pairIf it isAnd u is B (x i )≤v B (x i ),π A (x i )≤π B (x i ),Then u is A (x i )≤u B (x i )≤v B (x i )≤v A (x i ),
S 2 (π B (X))-S 2 (π A (X))=E(π B (X) 2 )-(E(π B (X))) 2 -(E(π A (X) 2 )-(E(π A (X))) 2 )
=(E(π B (X) 2 )-E(π A (X) 2 ))-((E(π B (X))) 2 -(E(π A (X))) 2 )
To pairπ B (x i )≥π A (x i ) Easy to obtain E (π) B (X) 2 )≥E(π A (X) 2 ) And (E (π) B (X))) 2 ≥(E(π A (X))) 2 Then S is 2 (π B (X))≥S 2 (π A (X)), namely S (π) B (X))≥S(π A (X)) is
From the formula (22), a
E fpi (B)≥E fpi (A) In that respect Similarly, ifWhen is toHas u B (x i )≥v B (x i ),π A (x i )≤π B (x i ) Having E of fpi (B)≥E fpi (A)。
(E4) Based on symmetry, E is easily obtained fpi (A)=E fpi (A C )。
3.2) general framework of Interval intuitive fuzzy sets (IVIFSs) metrics
From the general frameworks (11) - (13) of the intuitive fuzzy sets, similarly, the general framework of the corresponding interval intuitive fuzzy sets (iviffs) metric is given herein.
Here, theFunction(s)Is an interval intuitive fuzzy entropy that defines the distance between membership and non-membership. For example, it may be the entropy model proposed by and of lie:
entropy:
or:
based on the above analysis, the present embodiment proposes an entropy model of several measurement interval intuitive fuzzy sets,entropy is defined as follows:
Theorem 2. in pairsFormula (II)(32-35) the real function defined Is interval intuitive fuzzy entropy.
And (3) proving that: the demonstration of the entropy models (32-35) is similar, and the present example demonstrates the model (32) simply.
If it is usedIs the entropy of IVIFSs, it should satisfy definition 4, whereExpressing the entropy of the fuzzy set of intuitive intervals, thus satisfying the propertyThis example mainly demonstrates that:
if it is usedIs a distinct set, then there are And isThus is provided withAnd as can be derived from the equation (32),namely that
On the other hand, only whenWhen the temperature of the water is higher than the set temperature,thenNamely thatIs a distinct set.
since the function f (x) x (1-lnx) monotonically increases, it is possible to reduce the number of times that the function f (x) monotonically increasesNamely, it isThus, pair
To pairIf it isAnd is Andthen the present embodiment can obtain the inequality u A (x i )≤u B (x i )≤v B (x i )≤v A (x i ) And are and
In a similar manner to that described above,
is composed of formula (32)
Example 5:
the verification experiment of the multi-attribute decision system based on the intuitive fuzzy entropy and the interval fuzzy entropy described in the embodiments 1 and 4 comprises the following contents:
the entropy model framework proposed by the patent can be used for measurement of decision maker weights and expert weights for multi-attribute decision making. Obviously, if the larger the amount of information of a sample, the smaller its entropy, the larger the entropy weight of that attribute. To compare the effectiveness of the models, the present example made the following experiments:
example 1 Hubei province can be roughly divided into 7 agroecological regions according to the difference of environment and natural resources, and respectively uses alpha j And (j ═ 1,2, …, 7). The present embodiment considers the preferred ordering of the several ecoagricultural regions based on the statistics of the ecoagricultural regions. One composed of three experts R i (i-1, 2,3) given a weight vector λ -0.5, 0.2,0.3 according to their rank T . The attributes considered in the evaluation are for eachRegion alpha j Ecological, economic and social benefits C k (k ═ 1,2,3), assuming that the importance of these several benefits is completely unknown. The personal decision matrix for the expert's personal opinion of agroecological regional attributes is as follows:
next, this embodiment measures the hesitation weight coefficient and the attribute weight r of the expert respectively using the entropy models (22-25) proposed in this embodiment i ,w k (i, k ═ 1,2,3), and finally, a preferred ranking is made on the ecoagricultural areas.
In the first step, the decision maker weight is composed of two aspects, one is the expert importance, which is known; the other is randomness of evaluation of a decision maker, for example, if a certain decision maker is likely to score higher on the whole, or the hesitation degree of each attribute is large, the scoring quality of the decision maker is not high, and the weight of evaluation of the decision maker is smaller. First, the expectation and standard deviation of the hesitations of three decision makers are calculated:
substituting into model (22-25), calculating corresponding entropy as E (R)
In the second step, the larger the entropy, the higher the ambiguity, and the smaller the weight. So the decision maker weight r i Calculated according to the following formula
Substituting the data to respectively obtain the random influence weight of each decision maker on each model
Third, similarly, the benefit attribute weight may be calculated as follows:
fourthly, calculating the comprehensive score of each model of each region by the following formula
Finally, the higher the composite score, the better the composite benefit in the region. From matrix Z fpi (u j ) The data can show that the comprehensive benefit ordering of several entropies proposed by the embodiment is consistent. The ecological environment of each region is ordered as follows:
α 1 >α 4 >α 2 >α 5 >α 3 >α 7 >α 6
in order to check the validity of the measure of the frame entropy proposed in this embodiment, a comparative analysis was performed on the four models proposed in this embodiment and the model results proposed in the prior art. The main results are shown in table 1.
The model presented in table 1 and the literature [5] model demonstrated that λ ═ (0.5,0.2,0.3)
As can be seen from the data in Table 1, the algorithm proposed in this embodiment has an additional weight coefficient caused by the randomness of the hesitation of the decision maker, so that all the composite scores are smaller, but their preferred ranks are the same. For the four proposed model entropies, their results are very similar, namely the probability information entropy part E of hesitation pi (A) The contribution of the contribution is much larger, the distance E between degree of membership and degree of non-membership f (A) The influence is not great; the influence of the expected information of the hesitation degree on the weight coefficient is large, and the influence of the standard deviation is small. Therefore, in practical application, if the data is better, the entropy model can be selectedIf the requirement on the precision is high, the calculation can be selectedThe weights are calculated.
Example 5:
the verification experiments of the multi-attribute decision making system based on the intuitionistic fuzzy entropy and the interval fuzzy entropy described in the embodiments 2 and 4 comprise the following contents:
calculating decision maker and attribute weights r using a proposed entropy model (32-35) i ,w k (i, k ═ 1,2,3), and the agroecological regions are preferably ranked by the composite attribute score.
First, calculate the hesitation and standard deviation of the decision maker
S L (π i (X))=(0.0587 0.0660 0.0849),S U (π i (X))=(0.0921 0.1003 0.0957)
Substituting the models (32-35) to obtain the corresponding entropy of the models as
Step 2, the larger the entropy is, the smaller the ambiguity is, and the hesitation degree weight r of the decision maker i The following process is performed to make the following processes,
step 3, similarly, the attribute weight coefficient w i Can obtain
Step 4, calculating the comprehensive attribute value of each ecological agricultural area by using the following formula
Step 5, finally, according to the comprehensive scoreThe larger the model is, the more optimal the ecological agricultural area is, and from the conclusion of the empirical analysis, the comprehensive sequencing conclusion of the proposed models is consistent, and all the conclusions are alpha 1 >α 4 >α 2 >α 5 >α 3 >α 7 >α 6 。
In order to check the validity of the model, the proposed model was analyzed in comparison with the models mentioned in the prior art. Their analytical data are shown in Table 2.
Table 2 interval intuition fuzzy set different measurement method experimental result λ ═ (0.5,0.2,0.3)
As can be seen from Table 2, the algorithm proposed in this embodiment has an additional weight coefficient caused by the randomness of the hesitations of the decision maker, so that all the composite scores are smaller, but their preferred ranks are consistent. Taking the example as a research object, the comprehensive scores of the four proposed model entropies are very similar, namely the probability information entropy part of the hesitation degreeThe occupied effect is much larger, and the distance between the membership degree and the non-membership degreeThe influence on the comprehensive score is small; the influence of the expected information of the hesitation degree on the weight coefficient is large, and the influence of the standard deviation is small. Therefore, in practical application, if the data is better, the entropy model can be selectedIf the requirement on the precision is high, the calculation can be selectedThe weights are calculated.
And (4) conclusion:
in this embodiment, three measurement frames and four entropy models are provided for the intuitive fuzzy set and the interval intuitive fuzzy set, and theoretical proofs are made. The advantages of these models are:
(1) the metric framework includes the traditional degree of membership and the distance difference part E of the degree of membership f (A) Andand E f (A) Andcan be embodied by directly applying related research results.
(2) Example analysis shows that the probability information entropy E of the hesitation degree provided by the embodiment pi (A) Andthe method plays an absolute role in multi-attribute decision making; and the proposed entropy model E 4 (π i (A)),Simple and effective.
(3) The proposed metric framework applies to both Intuitive Fuzzy Sets (IFS) and interval fuzzy sets (IVIFS).
Claims (10)
1.A multi-attribute decision-making system based on intuition fuzzy entropy and interval fuzzy entropy is characterized in that: the fuzzy entropy calculation system comprises the decision information acquisition module, a fuzzy entropy calculation module and a decision result generation module.
The decision information acquisition module is used for acquiring a plurality of decision information matrixes of the target and transmitting the decision information matrixes to the fuzzy entropy calculation module.
The fuzzy entropy calculation module processes the decision information matrix to obtain a decision maker hesitation degree weight coefficient and a benefit attribute hesitation degree weight coefficient, and transmits the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient to the decision result generation module;
and the decision result generation module calculates the comprehensive evaluation result of each decision information matrix according to the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient, and obtains the optimal decision according to the comprehensive evaluation result of the decision information matrix.
2. The multi-attribute decision system based on intuitive fuzzy entropy and interval fuzzy entropy as claimed in claim 1, wherein the decision information matrix is denoted as R i (u jk ) (ii) a i represents the number of decision makers, j represents the evaluation number, and k represents the benefit number;
the fuzzy entropy calculation module is used for determining a decision information matrix R i (u jk ) The step of processing to obtain the decision maker hesitation degree weight coefficient and the benefit attribute hesitation degree weight coefficient comprises the following steps:
1) calculating the expectation and standard deviation of the hesitation degree of the decision maker and the expectation and variance of the hesitation degree of the benefit attribute of each decision information matrix;
wherein the desired vector is noted asThe vector of standard deviations is denoted S k (π i (X))={S(π 1 (X)),S(π 2 (X)) }, k ═ 1, 2; k-1 represents the hesitation degree of the expert, and k-2 represents the hesitation degree of the benefit attribute;
2) and (4) inputting the respective expectation and standard deviation of the hesitation degree and the benefit attribute weight of the decision maker into a fuzzy entropy calculation model, and calculating the fuzzy entropy.
The fuzzy entropy calculation model is stored in a decision maker hesitation degree weight coefficient and benefit attribute weight coefficient calculation module;
3) establishing a decision maker hesitation degree weight r ij The calculation formula, namely:
wherein (E) 1 ) ij Representing fuzzy entropy corresponding to the hesitation degree of the decision maker;
4) according to the data of the formula (1), calculating a hesitation degree weight coefficient matrix r (R) of each decision maker, namely:
in the formula, r 4n Representing a hesitation degree weight coefficient of the decision maker;
5) establishing a benefit attribute weight coefficient w ij The calculation formula, namely:
wherein i represents a method, and k represents the number of benefit attributes; (E) 2 ) ij Representing fuzzy entropy corresponding to the benefit attribute;
6) according to the data of the formula (2), calculating to obtain a hesitation degree weight coefficient matrix w (C) of each benefit attribute, namely:
in the formula, w 4k And a hesitation degree weight coefficient representing the benefit attribute.
3. The multi-attribute decision making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 2, wherein the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, which are respectively as follows:
in the formula,respectively outputting 4 intuitive fuzzy entropy calculation submodels; hesitation degree pi of fuzzy set A at point x A (x)=1-u A (x)-v A (x);μ A (x):X→[0,1],v A (x):X→[0,1]Respectively representing the membership degree and the non-membership degree of the fuzzy set A; e f (A) A distance representing a degree of membership and a degree of non-membership; s (pi) A (X)) is a hesitation degree pi A (x) Standard deviation of (d).
5. the multi-attribute decision-making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 4, wherein when the fuzzy entropy calculation model comprises 4 intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result Z of the decision information matrix fpi (u j ) As follows:
in the formula of lambda i Is a weight vector; r i (u jk ) Is decision information.
6. The multi-attribute decision making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 2, wherein the interval fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, which are respectively as follows:
in the formula,respectively calculating the output of the submodels for the 4 intervals of fuzzy entropy;a distance representing a degree of membership and a degree of non-membership; degree of hesitation of intervalSuperscript U, L represents an upper triangular matrix and a lower triangular matrix, respectively; is degree of hesitation of intervalDegree of hesitation of intervalStandard deviation of (d).
8. the multi-attribute decision-making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 7, wherein when the interval fuzzy entropy calculation model comprises 4 interval intuitive fuzzy entropy calculation submodels, the comprehensive evaluation result of the decision information matrixAs follows:
9. The multi-attribute decision making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 1, wherein: the decision information is obtained by expert experience.
10. The multi-attribute decision making system based on intuitive fuzzy entropy and interval fuzzy entropy of claim 1, wherein: the system also comprises a database used for storing data of the decision information acquisition module, the fuzzy entropy calculation module and the decision result generation module.
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