CN106096786A - Urban land plot ratio codomain based on probability reference determines method - Google Patents
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Abstract
The invention discloses a kind of urban land plot ratio codomain based on probability reference and determine method, belong to urban planning technical field.The present invention is directed to prior art not enough, use for reference the method for measuring similarity in machine learning, the analogy reference relation between plot is set up according to the similarity between plot, and when considering similarity between plot, not only consider traditional directly to build, to land used, the controlled attribute that potentiality are relevant, also taken into full account and can not build, with land used, the attribute of a relation that potentiality are directly related；Then randomly select with reference to plot for probability with similarity coefficient in similar land used, thus according to the numerical value in part rationally plot ratio plot, obtain, by iterative computation, the reasonable plot ratio waving interval that each land used is different.The present invention can determine the reasonable plot ratio scope of land used unit the most rapidly and accurately, provides scientific basis for urban planning and management and control.
Description
Technical field
The present invention relates to urban planning technical field, particularly relate to urban land plot ratio codomain and determine method.
Background technology
Plot ratio is the ratio with overall floorage on the ground with land area, and it reflects Land Use Degree and accumulation is held
Carry the height of density, be one of government's land used regulation and control main contents with planning management, be also in regulatory detailed urban plan
Key issue, for each side development such as the economy in city, environment, society, views, there is material impact.Have volume at present
Rate decision method specifically includes that
(1) experience method.Mainly by associated specialist and professional and technical personnel by use for reference the exploitation of relevant urban land and
City, place recent development experience, considers the factors such as land character, position, infrastructure condition, spatial environments, to land used
Plot ratio numerical value directly makes estimation.The method is more employing in the practice that plot ratio judges, relies primarily on planner subjective
Experience, difficulty is big, is many times difficult to reach common understanding.
(2) scheme method is had a fling at.By carrying out architectural design scheme arrangement at land used, extrapolate and meeting urban planning and building
On the premise of building Main Specification and using requirement, take into account suitable spatial shape effect, in a certain appearance that can reach on the ground
Long-pending rate score.Although the method result of determination is the most credible, but program is complicated and time-consuming, and be only suitable for for indivedual plot is detailed
Research, and its result of determination equally exists bigger subjectivity, depends on experience and the level having a fling at scheme person.
(3) single to degree Model Construction method.The most only make " reason from the economic factor such as function optimization and investment return
Property " decision-making[1]；Or only day as requested is carried out single-factor measuring and calculating and research as unique ideal conditions[2][3]；Or advocate to hold
The determination of long-pending rate is from " technical rationale moves towards policy attribute "[4], show its public administration meaning.Should say, such research is for holding
The understanding important in inhibiting of long-pending rate generting machanism, but they are conceived to the research of the single visual angle of land used own substantially, and do not have
There is outside this key factor of incidence relation of consideration land used.
(4) multi-dimensionality model codomain integration method.It it is the limit state under retraining respectively with conditions such as economy, environment, sunshines
For foundation, take its interval common factor[5], judge finally to determine span in conjunction with urban design intention and policy；Or pass through
Affect the correlative factor of plot ratio value in analyzing plot and section different aspects, construct the mathematics of correlative factor and plot ratio
Relational model, thus show that the plot ratio codomain for different land use type and different land use yardstick is interval[6][7][8][9].The party
Method is more fully more comprehensive than a kind of upper method, but still ignores this key that influences each other between land used when plot ratio judges
Factor.
(5) land used factor overlapping method.Generally can build each factor of influence of potentiality and be evaluated as foundation describing land used, obtain
Relatively reasonable mining inetesity intermediate value, then by suitably revising and floating to delimit interval[10][11].The method has
The most sturdy data support, also establishes part data origination for this patent method, but the method is with simple factor superposition
Judge plot ratio, excessively the positive correlation between dependent factor evaluation and plot ratio, ignore the multiple probability of land used with
And the complex relationship between land used.
Additionally, there is researcher to propose a kind of new thinking[12], judge volume to based on the similarity relation between land used
Amount has carried out desk study.But, the method still suffers from problems with: first, though cubical content index and plot ratio index have one
Determine dependency, but visibly different two indices: and cubical content is (single with the ratio of land area by architectural volume on the ground
Position: rice), plot ratio is the ratio (without unit) with construction area on the ground with land area.More importantly, from method aspect
See: (1) said method is not distinguished and can be built potential factor and the simple factor embodying land used attribute of a relation；(2) said method
At land used with reference to simply being averaged by each similar land used when selecting as reference object, do not account for necessity in actual decision-making
Probability occasionality and each land used different with reference to balance state；(3), in said method, the result of calculation of every piece of land used plot ratio is all
It is fixed numbers, and the different plot ratio codomains being formed without embodying this land used feature are interval, do not meet actual volume rate management and control
In distinctiveness interval requirement to different land use.
List of references:
[1] Zhao Kuitao, Hooke, Wang Dongyan, etc. Economic Floor Area Ratio thinking in town-level land use Potential Evaluation. state
Soil resource scientific and technological management, 2005,22 (3): 18-20
[2] Song little Dong, Sun Chengyu. the building floor area ratio evaluation method under sunlight ordinance constraint is inquired into. Urban Planning Forum,
2004, (6): 70-73
[3] Zhang Fang, Tian Xin. solve maximum volume rate estimation problem with artificial neural network. computer utility and software,
2008,25 (7): 163-164,179
[4] Sun Feng. from technical rationale to policy attribute--plot ratio control way research in planning management. urban planning,
2009,33 (11): 32-38
[5] salty Po Lam, Chen Xiaojian. rationally plot ratio determines means discussion. planner, 2008,24 (11): 60-65
[6] Huang Minghua, Huang Ruqin. commercial development project plot ratio " codomain " research [J] in regulatory plan.
Planner, 2010,26 (10): 28 33.
[7] Huang Minghua, Wang Yang. codomain: the urban newly-built area mining inetesity under performance visual angle controls thinking. urban planning
Transactions, 2013 (4): 54-59
[8] Huang Minghua, Ding Liang. science, reasonability, operability: the independence under economic interests and public interest Double-visual angle
Business plot plot ratio " codomain " is studied. urban planning, and 2014 (6): 50-58
[9] Guo Jing, Li Jia, Liu Kewei. Urban New District plot ratio controls threshold value and inquires into: to live and as a example by commercial land.
Northwest University's journal (natural science edition), 2014,44 (5): 808-812
[10] Liu Genfa, Wang Sen. mining inetesity scale-model investigation based on GIS: as a example by the central city of Shanghai City. urban planning
Academic periodical, 2008, (supplementary issue 1): 272-275
[11] Feng Yigang, the fixed power of analogy, Yin Changlin etc. urban residence plot ratio research: as a example by Changsha. Beijing: China
Building industry publishing house, 2009
[12] Wang Jianguo, Zhang Yu, Feng Han. mining inetesity decision-making based on land used attribute similarity relation under urban design intervention
Model [J]. Chinese science: science of technology, 2010,40 (09): 983-993
Summary of the invention
The technical problem to be solved is to overcome prior art not enough, it is provided that a kind of city based on probability reference
City's land used plot ratio codomain determines method, and in city, similar plot is as reference, uses probability comparator algorithm iterative computation to treat
Determine the plot ratio codomain of land used unit, the reasonable plot ratio codomain scope of land used unit can be determined rapidly and accurately, for city
Planning and management and control provide scientific basis.
The present invention solves above-mentioned technical problem the most by the following technical solutions:
A kind of urban land plot ratio codomain based on probability reference determines method, comprises the following steps:
Step 1, each attribute to land used unit each in city quantify, and are normalized to corresponding scope in (0,1)
Attribute factor, the vector that all properties factor of same land used unit is constituted as this land used unit attribute character to
Amount；The attribute of described land used unit includes directly can building the controlled attribute that potentiality are relevant to land used, and can not build with land used
If the attribute of a relation that potentiality are directly related；The attribute factor of controlled attribute is controlling elements, and the attribute factor of attribute of a relation is for closing
It it is the factor；Described land used unit includes known use known to land used unit to be determined that one group of plot ratio is unknown and one group of plot ratio
Ground unit；
Step 2, according to described attribute feature vector, from usefully unit is selected with each land used unit to be determined it
Between similarity coefficient the best part land used unit, as the similar plot of corresponding land used unit to be determined；
Step 3, the plot ratio codomain of the use each land used unit to be determined of probability comparator algorithm iterative computation, specific as follows:
Step 3-1, the plot ratio initializing each land used unit to be determined are A0；
Step 3-2, using similarity coefficient as select probability, utilize similar from each land used unit to be determined of roulette algorithm
Plot select at least one similar plot as the reference plot of corresponding land used unit to be determined；
Step 3-3, to each land used unit to be determined, according to the controlling elements weighted sum of this land used unit to be determined
SumaWith current controlling elements weighted sum Sum with reference to plotbBetween relation, to current ith iteration walk in this land used to be determined
Plot ratio A of unitiIt is updated, then goes to step 3-2, carry out next iteration；Described renewal is specific as follows:
Current with reference to plot to each, try to achieve corresponding A the most in accordance with the following methodsi+1, then average as this
Land used unit to be determined exports in the plot ratio of epicycle iteration:
If Suma≠Sumb, then:
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi/Sab-Bi)*D2-Ai]v；
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi*Sab-Bi)*D3-Ai]v；
If Suma=Sumb, and Ai=Bi, then: Ai+1=Ai=Bi；
Wherein, v is the default undulated control factor that span is (0,1), and m is the species number of controlling elements, D1、D2、
D3It is default diversity factor corrected parameter, BiFor the current plot ratio with reference to plot, SabFor land used unit to be determined with current
Similarity coefficient with reference to plot；
Step 3-4, as reached stopping criterion for iteration, then to each land used unit to be determined, take turns iteration from the most some
The plot ratio of this obtained land used unit to be determined chooses maximum and minima, respectively as this land used unit to be determined
The plot ratio upper limit, lower limit, thus obtain the plot ratio codomain that each land used unit to be determined in city is optimum.
Preferably, the similarity coefficient between any two land used unit is that the two land used unit is in attribute character space
Distance.Distance metric can use Euclidean distance, manhatton distance, Chebyshev's distance, Minkowski Distance, Hamming distance
Deng, the Euclidean distance that the present invention is the most the most frequently used.
The technique scheme known land used unit by a small amount of known volume rate, by iterative computation, is respectively treated
Determine the reasonable plot ratio waving interval of land used；It is well known, however, that the plot ratio of land used unit is not necessarily reasonably, this can be to finally
The plot ratio codomain of land used unit to be determined judges to produce impact, for avoiding this situation, present invention further propose that following changing
Enter scheme: the plot ratio of described known land used unit is the reasonable plot ratio through expert amendment.
Compared to existing technology, technical solution of the present invention has the advantages that
The present invention uses for reference the method for measuring similarity in machine learning, sets up between plot according to the similarity between plot
Analogy reference relation；Then randomly select with reference to plot with similarity coefficient for probability in similar land used, thus according on a small quantity
Rationally the numerical value in plot ratio plot, obtains, by iterative computation, the reasonable plot ratio waving interval that each land used is different.More meet rule
Draw decision-making experience and actual fairness, embody the decision-making rationality accommodating reality occasionality.
The present invention, when considering similarity between plot, not only considers traditional directly to build, to land used, the control that potentiality are relevant
Attribute processed, has also taken into full account and can not build, with land used, the attribute of a relation that potentiality are directly related, land used relationship description is more careful,
With reference to the selection more comprehensive and reasonable in plot, the plot ratio codomain obtained is more scientific.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that in detailed description of the invention, plot ratio codomain of the present invention determines method；
Fig. 2 is that the land used unit plot ratio to be determined using the inventive method to obtain calculates process and codomain result.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in detail:
The present invention is directed to prior art not enough, use for reference the method for measuring similarity in machine learning, according to the phase between plot
Set up the analogy reference relation between plot like property, and when considering similarity between plot, not only consider traditional direct
The controlled attribute that potentiality are relevant can be built to land used, also taken into full account that can not build the directly related pass of potentiality with land used be
Property；Then randomly select with reference to plot with similarity coefficient for probability in similar land used, thus according to a small amount of rationally plot ratio ground
The numerical value of block, obtains, by iterative computation, the reasonable plot ratio waving interval that each land used is different.
For the ease of public understanding, with a specific embodiment, technical solution of the present invention is described in detail below.
Urban land plot ratio codomain of the present invention determines method, comprises the following steps:
Step 1, each attribute to land used unit each in city quantify, and are normalized to corresponding scope in (0,1)
Attribute factor, the vector that all properties factor of same land used unit is constituted as this land used unit attribute character to
Amount；The attribute of described land used unit includes directly can building the controlled attribute that potentiality are relevant to land used, and can not build with land used
If the attribute of a relation that potentiality are directly related；The attribute factor of controlled attribute is controlling elements, and the attribute factor of attribute of a relation is for closing
It it is the factor；Described land used unit includes known use known to land used unit to be determined that one group of plot ratio is unknown and one group of plot ratio
Ground unit；
By integrating city As-Is analysis and existing program results, in terms of land character, land used accessibility etc., to each
The construction potentiality of land used unit carry out factor scores, it is thus achieved that every factor F on every piece of groundk(0<Fk≤1).(different cities can be for
Its feature chooses different evaluation points).It is relevant that the ground blocking factor of traditional scheme only considers directly can to build potentiality to land used
Attribute, such as accessibility, land price, literary composition guarantor's scope control etc., this kind of factor and plot ratio have positive correlation or negative correlation
Relation.And all properties in plot is divided into two classes by the present invention: (a) directly can build the relevant control of potentiality and belong to land used
Property (the ground block's attribute i.e. considered in traditional method)；B () can not build potentiality with land used directly related, only reflection land used feature
Difference and the attribute of a relation contacted.The corresponding factor is called controlling elements and relationship factor.Traditional controlling elements and use
There is the closest positive correlation between ground plot ratio, such as, accessibility is as controlling elements, and it is good that is because accessibility
Land used, in general should have higher plot ratio；And relationship factor does not exist this positive correlation, but distinguish difference
Land used feature and contact, such as, general being difficult to determines urban green space periphery or the land used volume of urban look band periphery
Rate should be higher or lower, but when decision-making one is positioned at the land used plot ratio of urban green space periphery, is referred to other next-door neighbour cities
The Rational Land Use plot ratio numerical value in greenery patches, city makes a determination, and for another example, land area is also only as relationship factor, it is impossible to as control
The factor processed, because not land area is the biggest, its plot ratio just should be the highest or the lowest, but the close land used of size can phase
Mutually with reference to its development mode, the most often there is plot ratio index relatively.Therefore, it is no, use adjacent with urban green space
This kind of factor of ground area cannot function as the controlled attribute factor, and should be used as the attribute of a relation factor and describe.
In city, each plot (includes the known land used unit of known volume rate and the land used list to be determined that plot ratio is unknown
Unit) controlling elements and relationship factor i.e. may make up reflect this ground block feature characteristic vector.It is known that the appearance of land used unit
Long-pending rate can use its actual plot ratio, but the actual volume rate of these known land used unit is the most scientific and reasonable, as
Fruit utilizes these plot ratio numerical value to determine the plot ratio of land used unit to be determined, it is clear that can cause result error.To this end, this
Bright further the plot ratio of these known land used unit is modified, as obtained these known land used unit by expert's assessment
Reasonable plot ratio.Owing to the present invention uses the mode iterated to carry out subsequent calculations, it is only necessary to have reasonable volume on a small quantity
The known land used unit of rate, therefore can reject remaining known land used unit or directly as land used unit to be determined.
Step 2, according to described attribute feature vector, from usefully unit is selected with each land used unit to be determined it
Between similarity coefficient the best part land used unit, as the similar plot of corresponding land used unit to be determined；
The present invention uses for reference the method for measuring similarity in machine learning, according to the attribute feature vector in each plot, can calculate
Go out all plot similarity coefficient between any two.The tolerance of similarity coefficient can use the Euclidean distance in characteristic vector space, graceful
Hatton's distance, Chebyshev's distance, Minkowski Distance, Hamming distance etc., or comentropy, correlation coefficient etc..This is concrete
Similarity coefficient S between any two plot a and plot b in embodimentabCan pass through formula (1) to calculate, similarity coefficient is the biggest, then and two
Similarity between individual plot is the highest:
In formula, n is the dimension of the attribute feature vector in plot, that is total classification number of attribute；Fk(a)、Fk(b)It is respectively a, b
The attribute factor of the kth attribute in two plot；WkWeights for kth attribute.
By similarity coefficient cut-off S set in advance1, filter out the incidence relation between plot, the most only two plot phases
Like coefficient more than S1, just think their the most similar plot；The phase also can further adjacent plot being separately provided
Like coefficient threshold S2, S2S can be more than1Might be less that S1.Can be so that each land used unit to be determined is selected corresponding
Similarly set of blocks.
Step 3, the plot ratio codomain of the use each land used unit to be determined of probability comparator algorithm iterative computation, specific as follows:
Step 3-1, the plot ratio initializing each land used unit to be determined are A0；
Owing to the present invention uses iterative algorithm Step wise approximation optimum plot ratio, therefore original volume rate A0Arbitrarily set, example
As may be configured as 0.
Step 3-2, using similarity coefficient as select probability, utilize similar from each land used unit to be determined of roulette algorithm
Plot select at least one similar plot as the reference plot of corresponding land used unit to be determined；
To each land used unit to be determined, from its similarly set of blocks, with similarity coefficient SabFor probability, randomly select
NumIndividual plot, as the plot the highest with reference to plot, i.e. similarity coefficient of this land used unit to be determined, is selected the probability of reference
The biggest.The present embodiment uses roulette wheel selection: split roulette according to each select probability with reference to plot similarity coefficient
In disk, then produce the random number between [0,1], this random number determined selected individuality as select finger.
NumValue can be 1, it is also possible to for the integer (i.e. choose multiple with reference to plot) more than 1.
Step 3-3, to each land used unit to be determined, according to the controlling elements weighted sum of this land used unit to be determined
SumaWith current controlling elements weighted sum Sum with reference to plotbBetween relation, to current ith iteration walk in this land used to be determined
Plot ratio A of unitiIt is updated, then goes to step 3-2, carry out next iteration；
Controlling elements weighted sum Sum of arbitrary land used unit is represented by:
For each land used unit to be determined, according to its current plot ratio B with reference to plotiDetermine from changing in epicycle
Plot ratio A in Daii+1, plot ratio Ai+1Calculate according to controlling elements weighted sum Sum of this land used unit to be determinedaWith currently
Controlling elements weighted sum Sum with reference to plotbBetween the difference of relation and different, specific as follows:
If Suma≠Sumb, then:
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi/Sab-Bi)*D2-Ai]v；
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi*Sab-Bi)*D3-Ai]v；
If Suma=Sumb, and Ai=Bi, then: Ai+1=Ai=Bi；
Wherein, v is the default undulated control factor that span is (0,1), for the width of controlled plot of land change fluctuation
Degree, v value is closer to 1, and the fluctuating margin of result is the biggest, and v value is closer to 0, and result fluctuation is the most smooth；M is the kind of controlling elements
Number；D1、D2、D3It is default diversity factor corrected parameter, (can arrange voluntarily, usual value is 1), its role is to control to belong to
Property similar land used between diversity factor, its difference degree described by i.e. two plot similarity coefficients and its actual mining inetesity difference
Between conversion relation；BiFor the current plot ratio with reference to plot, SabFor land used unit to be determined and the current phase with reference to plot
Like coefficient.
If selected number N with reference to plotumMore than 1, then by each A corresponding with reference to ploti+1It is averaged.
Step 3-4, as reached stopping criterion for iteration, then to each land used unit to be determined, take turns iteration from the most some
The plot ratio of this obtained land used unit to be determined chooses maximum and minima, respectively as this land used unit to be determined
The plot ratio upper limit, lower limit, thus obtain the plot ratio codomain that each land used unit to be determined in city is optimum；
End condition in iterative algorithm usually reaches default maximum iteration time or degree of convergence is preset
Index.The present invention can use equally default maximum iteration time as end condition, or with each land used unit to be determined
Plot ratio change fluctuation tends towards stability as stopping criterion for iteration.Such as, concrete iteration ends calculation condition may be configured as: each
Land used unit continuous 10 to be determined is taken turns result of calculation meansigma methods and is both less than a certain number with 10 differences taking turns result of calculation meansigma methods before
Value (such as 0.2).After computing terminates, take the maximum in the result of calculation that every piece of ground (is taken turns such as 10 or 20 takes turns) the most some taking turns
Export with minima, as the upper and lower limit of its reasonable plot ratio codomain.
The flow process of above-mentioned whole algorithm is as shown in Figure 1.
In order to verify technical solution of the present invention effect, carry out confirmatory experiment: first, according to city As-Is analysis and existing
The construction potentiality of each land used unit, in terms of the view attribute of land used and functional attributes etc., are carried out the factor and comment by program results
Point, obtain every controlling elements；Then the relationship factor of each land used is marked, mainly include whether to adjoin city-level view
Band, if adjoin urban green space and scale of greenbelts；Then, by comparing the difference between all factors in plot two-by-two, calculate
Similarity coefficient between its land used；Then threshold value S is set1, filter out the incidence relation between plot, the most only two plot
Similarity coefficient is more than certain numerical value, just thinks that they are each other with reference to relation；Plot is adjacent can be regarded as a kind of special
Similarity relation, i.e. position are similar, therefore, can suitably reduce threshold value S of similarity coefficient between adjacent plot2.When system is run, right
Arbitrary plot ratio plot undetermined, filters out and the plot of its land used attribute similarity with certain threshold value, and from these similar plot,
With the height of similarity coefficient as probability, randomly select a plot as the plot the highest with reference to plot, i.e. similarity coefficient, selected
The probability taking reference is the biggest.(using roulette wheel selection here, specific algorithm is: split according to the select probability of each individuality
Disk in roulette, then produces the random number between [0,1], determines as select finger selected using this random number
Individual.) then according to aforementioned algorism launches iterative computation, until substantially meeting stopping criterion for iteration between plot, system is one
Determine to reach in degree dynamic equilibrium.The most just can get the reasonable plot ratio codomain scope in plot undetermined, meanwhile, the most steady
Fixed urban morphology is also its abiogenous legitimate result.
The experimental result that finally gives is as in figure 2 it is shown, as can be seen from the figure: the initial value in each plot ratio plot undetermined
It is 0.After system brings into operation, each plot undetermined plot ratio is stepped up in fuctuation within a narrow range that (fluctuating margin at this moment mainly takes
Certainly in parameter v), then progressively tend to relatively stable fluctuation at certain altitude, but this fluctuation will not stop.About 150
After secondary iterative computation, each plot fluctuating margin is the most substantially constant within a certain range.Plot ratio numerical value after becoming surely is currently
Under the conditions of predict the outcome, waving interval when each plot becomes steady can regard relatively reasonable mining inetesity codomain scope as.From
It can be seen that the control interval in different plot has notable difference in figure, relatively low 2,4,5, No. 6 lands used of such as plot ratio exist
After system becomes surely, fluctuating margin is the least, this is because the plot similar to these lands used, its plot ratio is smaller, they
Between difference the least；No. 68 land used then fluctuating margins that plot ratio is the highest have reached about 1.This is for determining each plot not
Same reasonable plot ratio codomain scope provides objective basis.Can get each plot by the method and be difficult to the difference of subjective forecast
Property plot ratio dynamic fluctuation codomain, credible and reduce the due complexity of urban morphology observantly.
Claims (5)
1. a urban land plot ratio codomain based on probability reference determines method, it is characterised in that comprise the following steps:
Step 1, each attribute to land used unit each in city quantify, and are normalized to the corresponding scope genus in (0,1)
Sex factor, the vector that all properties factor of same land used unit is constituted is as the attribute feature vector of this land used unit；Institute
The attribute stating land used unit includes directly can building the controlled attribute that potentiality are relevant to land used, and can not build potentiality with land used
Directly related attribute of a relation；The attribute factor of controlled attribute is controlling elements, and the attribute factor of attribute of a relation is relationship factor；
Described land used unit includes known land used unit known to land used unit to be determined that one group of plot ratio is unknown and one group of plot ratio；
Step 2, according to described attribute feature vector, from usefully unit is selected between each land used unit to be determined
Similarity coefficient the best part land used unit, as the similar plot of corresponding land used unit to be determined；
Step 3, the plot ratio codomain of the use each land used unit to be determined of probability comparator algorithm iterative computation, specific as follows:
Step 3-1, the plot ratio initializing each land used unit to be determined are A0；
Step 3-2, using similarity coefficient as select probability, utilize roulette algorithm from the similar plot of each land used unit to be determined
At least one similar plot of middle selection is as the reference plot of corresponding land used unit to be determined；
Step 3-3, to each land used unit to be determined, according to controlling elements weighted sum Sum of this land used unit to be determinedaWith
Current controlling elements weighted sum Sum with reference to plotbBetween relation, to current ith iteration walk in this land used unit to be determined
Plot ratio AiIt is updated, then goes to step 3-2, carry out next iteration；Described renewal is specific as follows:
Current with reference to plot to each, try to achieve corresponding A the most in accordance with the following methodsi+1, then average and treat really as this
Determine land used unit epicycle iteration plot ratio export target:
If Suma≠Sumb, then:
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi/Sab-Bi)*D2-Ai]v；
If Suma=Sumb, and Ai＜ Bi, then: Ai+1=Ai+[Bi+(Bi*Sab-Bi)*D3-Ai]v；
If Suma=Sumb, and Ai=Bi, then: Ai+1=Ai=Bi；
Wherein, v is the default undulated control factor that span is (0,1), and m is the species number of controlling elements, D1、D2、D3All
For default diversity factor corrected parameter, BiFor the current plot ratio with reference to plot, SabFor land used unit to be determined and current reference
The similarity coefficient in plot；
Step 3-4, as reached stopping criterion for iteration, then to each land used unit to be determined, take turns iteration gained from the most some
To this land used unit to be determined plot ratio in choose maximum and minima, respectively as the appearance of this land used unit to be determined
Long-pending the rate upper limit, lower limit, thus obtain the plot ratio codomain that in city, each land used unit to be determined is optimum.
2. method as claimed in claim 1, it is characterised in that the similarity coefficient between any two land used unit is the two
Land used unit distance in attribute character space.
3. method as claimed in claim 2, it is characterised in that described distance is Euclidean distance.
4. method as claimed in claim 1, it is characterised in that described stopping criterion for iteration is particularly as follows: reach default maximum and change
Generation number, or the change threshold that the change of continuous several times iteration output is respectively less than preset.
5. method as claimed in claim 1, it is characterised in that the plot ratio of described known land used unit is the conjunction through expert amendment
Reason plot ratio.
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| CN111401714A (en) * | 2020-03-10 | 2020-07-10 | 张邦妹 | Urban area reference density partitioning method |
| CN111507503A (en) * | 2020-02-28 | 2020-08-07 | 中国城市规划设计研究院 | Water supply pipe network parameter determining method and device |
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| CN111507503A (en) * | 2020-02-28 | 2020-08-07 | 中国城市规划设计研究院 | Water supply pipe network parameter determining method and device |
| CN111507503B (en) * | 2020-02-28 | 2024-04-09 | 中国城市规划设计研究院 | Water supply network parameter determination method and device |
| CN111401714A (en) * | 2020-03-10 | 2020-07-10 | 张邦妹 | Urban area reference density partitioning method |
| CN111401714B (en) * | 2020-03-10 | 2023-06-06 | 张邦妹 | Urban reference density partitioning method |
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