CN111275349A - Remanufacturing process planning method based on block chain and instance reasoning - Google Patents

Remanufacturing process planning method based on block chain and instance reasoning Download PDF

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CN111275349A
CN111275349A CN202010082718.5A CN202010082718A CN111275349A CN 111275349 A CN111275349 A CN 111275349A CN 202010082718 A CN202010082718 A CN 202010082718A CN 111275349 A CN111275349 A CN 111275349A
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case knowledge
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李胜强
张华�
鄢威
江志刚
邢世雄
贺杨晨玥
肖智文
方陈
王三平
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Abstract

The invention discloses a remanufacturing process planning method based on block chain and instance reasoning, and belongs to the technical field of remanufacturing of electromechanical products. The method comprises the following steps: the standardization represents the remanufacturing process planning problem to be solved; retrieving the remanufacturing process case knowledge through a nearest neighbor algorithm; and evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form. The invention can effectively help the small and medium-sized remanufacturing enterprises to rapidly and efficiently plan the optimal remanufacturing process scheme integrating economic, environmental and social benefits into a whole by safely and efficiently sharing the remanufacturing process case knowledge of the small and medium-sized remanufacturing enterprises, thereby realizing the steady forward development of the whole remanufacturing industry.

Description

Remanufacturing process planning method based on block chain and instance reasoning
Technical Field
The invention relates to the technical field of remanufacturing of electromechanical products, in particular to a remanufacturing process planning method based on a block chain and instance reasoning.
Background
In the past years, the rapid development of the electromechanical industry in China greatly improves the living standard of our materials, but also brings various electromechanical products such as waste engineering machinery, machine tools, automobiles and the like with residual values which are not fully utilized. Remanufacturing, which is a new End-Of-life (eol) strategy, can fully release the residual value Of the waste electromechanical product by integrating various links such as recovery, disassembly, cleaning, initial inspection, repair, final inspection and the like, so that each part Of the waste electromechanical product can be recycled in a remanufacturing, recycling or recycling manner. However, due to the large uncertainty of the waste parts in terms of quality, failure characteristics, remaining life, etc., the remanufacturing process planning, i.e., the repair process planning, of the waste parts is a time-consuming and knowledge-intensive activity. In addition, due to the limitations of scale, capital and development time, it is difficult for small and medium-sized enterprises in remanufacturing to accumulate sufficient and effective remanufacturing process case knowledge, so that the small and medium-sized enterprises are difficult to plan an optimal remanufacturing process scheme for waste parts with different failure forms, quality conditions and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a remanufacturing process planning method based on a block chain and instance reasoning.
The invention provides a remanufacturing process planning method based on block chain and instance reasoning, which comprises the following steps:
s1, standardizing to represent the remanufacturing process planning problem to be solved;
s2, retrieving remanufacturing process case knowledge through a nearest neighbor algorithm according to the remanufacturing process planning problem after standardized representation;
and S3, acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
Preferably, before the step S1, the method further includes:
and acquiring remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form, and constructing a remanufacturing process case knowledge block chain.
Preferably, the step S2 specifically includes:
and calculating the similarity of each characteristic attribute between the remanufacturing process planning problem to be solved and the remanufacturing process case knowledge through a nearest neighbor algorithm, then carrying out weighted summation on the similarity of the characteristic attributes to obtain the global similarity, and arranging the retrieval results according to the size of the global similarity.
Preferably, the obtaining of the retrieved remanufacturing process case knowledge in the step S3 specifically includes:
s31, the requester queries the remanufacturing process case knowledge recorded on the remanufacturing process case knowledge block chain;
s32, the requester generates a key pair, stores a private key used for creating the signature request and a public key shared with the owner of the remanufacturing process case knowledge, namely a provider, and creates the signature request through the private key;
and S33, after the provider verifies the signature through the public key to confirm the signature request, the requester fulfills a preset intelligent contract and obtains the retrieved remanufacturing process case knowledge, the system creates a transaction block recording the transaction information of the remanufacturing process case knowledge, and the private key of the provider encrypts the transaction block.
Preferably, the form of the knowledge block includes:
case knowledge numbering, case problem formulation and problem resolution,
wherein the case problem description comprises: the name, brand, type, material type, failure location, failure characteristics and failure degree of the waste part,
the problem solution comprises: recovery process, recovery equipment information and processing parameters.
Preferably, the process of constructing a remanufacturing process case knowledge block chain includes:
s61, utilizing an SHA256 hash function to generate hash codes, encrypting the remanufacturing process case knowledge stored on the remanufacturing process case knowledge block, and then encrypting the hash codes through a private key by an owner of the remanufacturing process case knowledge to generate a case knowledge block;
s62, broadcasting the remanufacturing process case knowledge block to all nodes of the remanufacturing process case knowledge block chain, and acquiring verification and permission of each node;
s63, decrypting the remanufactured process case knowledge block by each node by using the public key of the node uploading the remanufactured process case knowledge block, and looking up and verifying the basic information;
s64, if the verification passes and the permission of each node is obtained, the remanufactured process case knowledge block is linked to the remanufactured process case knowledge block chain to which the remanufactured process case knowledge block was successfully added according to the hash code of the last case knowledge block added to the remanufactured process case knowledge block chain and to the last transaction block.
The invention also provides a remanufacturing process planning device based on the block chain and the instance reasoning, which comprises the following steps:
a standardization module for standardizing the remanufacturing process planning problem to be solved;
the retrieval module is used for retrieving the remanufacturing process case knowledge through a nearest neighbor algorithm according to the remanufacturing process planning problem after standardized representation;
and the application module is used for acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
Preferably, the remanufacturing process planning apparatus based on the blockchain and the example reasoning further includes:
and the block chain generation module is used for acquiring the remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form and constructing the remanufacturing process case knowledge block chain.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of any remanufacturing process planning method based on the block chain and the example reasoning.
The present invention also provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of any of the above methods for remanufacturing process planning based on blockchain and instance inference.
Compared with the prior art, the invention has the beneficial effects that:
the invention solves the problem of remanufacturing process planning by combining the blockchain technology and the application example reasoning technology, fully exerts the advantages of the two technologies, and can effectively eliminate the worry of small and medium-sized remanufacturing enterprises about remanufacturing process case knowledge sharing risks by the characteristics of decentralization, non-tampering, collective maintenance and the like of the blockchain, thereby overcoming the limitation that the traditional example reasoning technology is only suitable for sharing and reusing knowledge in a single enterprise.
By providing the remanufacturing process planning method, the remanufacturing process knowledge sharing among enterprises can be realized while the safety and the efficiency are ensured, the limitation that small enterprises in remanufacturing lack scientific and effective remanufacturing process case knowledge is overcome, the small enterprises in remanufacturing are assisted to plan an optimal remanufacturing process scheme, the remanufacturing process planning level of the whole remanufacturing process of a small and medium enterprise alliance in remanufacturing is improved, and the coordinated development of economic benefits, environmental benefits and social benefits is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a remanufacturing process planning method based on blockchain and example reasoning in an embodiment of the invention;
FIG. 2 is a remanufacturing process case knowledge acquisition flow diagram in an embodiment of the invention;
FIG. 3 is a flow chart for building a remanufacturing process case knowledge blockchain in an embodiment of the invention;
fig. 4 is a block diagram of a remanufacturing process planning apparatus based on blockchain and example reasoning in an embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a remanufacturing process planning method based on a block chain and instance reasoning, as shown in fig. 1, the method comprises the following steps:
s1, standardizing to represent the remanufacturing process planning problem to be solved;
s2, retrieving remanufacturing process case knowledge through a nearest neighbor algorithm according to the remanufacturing process planning problem after standardized representation;
and S3, acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
Preferably, before the step S1, the method further includes:
and acquiring remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form, and constructing a remanufacturing process case knowledge block chain.
Preferably, the step S1 specifically includes:
dividing the remanufacturing process planning problem into three parts, namely case knowledge numbering, case problem description and problem solution, and standardizing the remanufacturing process planning problem to be solved according to a standardized template.
In a specific embodiment, in order to facilitate retrieving and sharing the remanufacturing process case knowledge information recorded on the remanufacturing process case knowledge block chain, each member in the small and medium-sized enterprise alliance needs to convert the remanufacturing process case knowledge in various forms inside the small and medium-sized enterprises into a uniform case knowledge representation form. Aiming at the remanufacturing and repairing process, the remanufacturing process case knowledge representation mainly comprises three parts, namely case knowledge serial numbers, case problem description and a problem solution. The problem description can be further refined into the names, brands, types, material types, failure positions, failure characteristics, failure degrees and the like of the waste parts; the solution mainly comprises information such as recovery process, recovery equipment information, processing parameters and the like. Therefore, in consideration of the characteristics of the waste parts and the corresponding repair processes, the remanufacturing process CASE knowledge can be defined as a set of triples, namely, CASE { I, P, S }, wherein I is a repair process CASE knowledge number, P is a problem description and mainly comprises basic information of a used part, fault characteristics of the used part and the like, and S is a solution corresponding to the remanufacturing repair process planning problem. According to the basic information of the waste parts and the characteristics of the remanufacturing and repairing process, the remanufacturing process case knowledge can be expressed in the form shown in the table 1:
TABLE 1 remanufacturing process case knowledge representation
Figure BDA0002380876400000071
Figure BDA0002380876400000081
Preferably, the step S2 specifically includes:
and calculating the similarity of each characteristic attribute between the remanufacturing process planning problem to be solved and the remanufacturing process case knowledge through a nearest neighbor algorithm, then carrying out weighted summation on the similarity of the characteristic attributes to obtain the global similarity, and arranging the retrieval results according to the size of the global similarity.
In a specific embodiment, in the case knowledge retrieval process, the feature attribute similarity between the remanufacturing process planning problem to be solved and the existing remanufacturing process case knowledge is firstly calculated by using a nearest neighbor algorithm, and then the feature attribute similarity is subjected to weighted summation to obtain the global similarity, wherein the formula is as follows:
Figure BDA0002380876400000082
wherein P isaAnd PbRespectively representing the remanufacturing process planning problem to be solved and the remanufacturing process case knowledge recorded on the remanufacturing process case knowledge blockchain,
Figure BDA0002380876400000091
and
Figure BDA0002380876400000092
respectively represent PaThe ith characteristic attribute of (1) and PbW (D) ofi) Is a characteristic attribute DiThe weight of (a) can be obtained by using an analytic hierarchy process.
Figure BDA0002380876400000093
Refer to
Figure BDA0002380876400000094
And
Figure BDA0002380876400000095
local degree of identification of (1), Sim (p)a,pb) Refers to the remanufacturing process planning problem P to be solvedaAnd recording the overall similarity of the remanufacturing process case knowledge on the remanufacturing process case knowledge blockchain;
for remanufacturing process case knowledge characteristics with values of numerical type, the degree of acquaintance between the characteristics belonging to the type is as follows:
Figure BDA0002380876400000096
where max (D)i) And min (D)i) Respectively represent characteristic attributes DiThe maximum value and the minimum value of (c).
For remanufacturing process case knowledge characteristics which take on a character string type, the similarity between the characteristics belonging to the type is as follows:
Figure BDA0002380876400000097
for remanufacturing process case knowledge whose value is enumerated, the similarity between features belonging to this type is:
Figure BDA0002380876400000098
where H is a characteristic attribute DiThe maximum enumerated value of.
Preferably, the obtaining of the retrieved remanufacturing process case knowledge in the step S3, as shown in fig. 2, specifically includes:
s31, the requester queries the remanufacturing process case knowledge recorded on the remanufacturing process case knowledge block chain;
s32, the requester generates a key pair, stores a private key used for creating the signature request and a public key shared with the owner of the remanufacturing process case knowledge, namely a provider, and creates the signature request through the private key;
and S33, after the provider verifies the signature through the public key to confirm the signature request, the requester fulfills a preset intelligent contract and obtains the retrieved remanufacturing process case knowledge, the system creates a transaction block recording the transaction information of the remanufacturing process case knowledge, and the private key of the provider encrypts the transaction block.
In a specific embodiment, the case knowledge is acquired from an enterprise which has the remanufacturing process case knowledge with the highest similarity in the form of transaction; and judging whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved or not by comprehensively evaluating the case knowledge, if so, directly using the acquired case knowledge to assist relevant technicians in the knowledge demander to solve the remanufacturing process planning problem, and further acquiring comprehensive and optimal remanufacturing economic, environmental and social benefits. If not, the acquired case knowledge is modified correspondingly according to the actual manufacturing situation to meet the requirement of solving the remanufacturing process planning problem, and the modified case knowledge, namely the form of the new case knowledge block, is added into a remanufacturing process case knowledge block chain for subsequent reuse and sharing.
Preferably, the form of the knowledge block includes:
case knowledge numbering, case problem formulation and problem resolution,
wherein the case problem description comprises: the name, brand, type, material type, failure location, failure characteristics and failure degree of the waste part,
the problem solution comprises: recovery process, recovery equipment information and processing parameters.
Preferably, the process of constructing the remanufacturing process case knowledge block chain, as shown in fig. 3, includes:
s61, utilizing an SHA256 hash function to generate hash codes, encrypting the remanufacturing process case knowledge stored on the remanufacturing process case knowledge block, and then encrypting the hash codes through a private key by an owner of the remanufacturing process case knowledge to generate a case knowledge block;
s62, broadcasting the remanufacturing process case knowledge block to all nodes of the remanufacturing process case knowledge block chain, and acquiring verification and permission of each node;
s63, decrypting the remanufactured process case knowledge block by each node by using the public key of the node uploading the remanufactured process case knowledge block, and looking up and verifying the basic information;
s64, if the verification passes and the permission of each node is obtained, the remanufactured process case knowledge block is linked to the remanufactured process case knowledge block chain to which the remanufactured process case knowledge block was successfully added according to the hash code of the last case knowledge block added to the remanufactured process case knowledge block chain and to the last transaction block.
Preferably, the method further comprises the following steps of constructing a remanufactured transaction information block chain:
generating a remanufacturing process case knowledge transaction block, the transaction block comprising: transaction time, basic information and requirements of both transaction parties;
generating a hash value through an SHA256 hash function, and encrypting basic information stored on the remanufacturing process case knowledge block;
the remanufacturing process case knowledge transaction block is broadcasted to all nodes of the remanufacturing process case knowledge block chain, and verification and permission of each node are obtained;
each node decrypts the remanufactured process case knowledge transaction block by using the public key of the node uploaded to the remanufactured process case knowledge transaction block, and basic information is consulted and verified;
and if the verification is passed and the permission of each node is obtained, according to the hash code of the last case knowledge transaction block added to the remanufacturing process case knowledge transaction block chain, the remanufacturing process case knowledge transaction block is successfully added to the remanufacturing process case knowledge transaction block chain and is connected with the last case knowledge transaction block.
In a specific embodiment, the transaction information of the remanufacturing process case knowledge is added in the form of transaction blocks in a chain of remanufacturing process case knowledge transaction blocks existing among the alliances of small and medium-sized enterprises in remanufacturing.
And generating a remanufacturing process case knowledge transaction block on the basis of the case knowledge block chain. The transaction block mainly comprises transaction time, basic information of both transaction parties and a statement from the remanufacturing process case knowledge demand party, namely the demand party obtains a certain remanufacturing process case knowledge required by the demand party from the case knowledge provider; in order to ensure the safety of the transaction information, firstly, the SHA256 is used for generating a hash value, the basic information stored on the remanufacturing process case knowledge block is encrypted, and then the remanufacturing process case knowledge demander uses a private key thereof to encrypt the generated hash value, so that the transaction information is prevented from being tampered.
In order to successfully add the remanufactured process case knowledge transaction block to the chain of remanufactured process case knowledge transaction blocks, the remanufactured process case knowledge transaction block is broadcasted to all nodes (i.e. member enterprises in a remanufactured middle and small enterprise alliance) to obtain the verification and permission of each node.
Each node enterprise decrypts the remanufactured process case knowledge transaction block by using the public key of the enterprise uploading the remanufactured process case knowledge transaction block, and looks up and verifies relevant basic information.
And if the verification is passed and the permission of each node is obtained, according to the hash value of the case knowledge block added to the remanufacturing process case knowledge transaction block chain, the remanufacturing process case knowledge transaction block chain to which the remanufacturing process case knowledge transaction block is successfully added is connected with the previous transaction block.
An embodiment of the present invention further provides a remanufacturing process planning apparatus based on a block chain and instance reasoning, as shown in fig. 4, including:
a standardization module 71 for standardizing the remanufacturing process planning problem to be solved;
the retrieval module 72 is configured to retrieve, according to the remanufacturing process planning problem after the standardized representation, remanufacturing process case knowledge through a nearest neighbor algorithm;
and the application module 73 is used for acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, and if not, modifying the remanufacturing process case knowledge and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
Preferably, the remanufacturing process planning apparatus based on the blockchain and the example reasoning further includes:
and the block chain generation module is used for acquiring the remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form and constructing the remanufacturing process case knowledge block chain.
Preferably, the search module is specifically configured to calculate feature attribute similarities between the remanufacturing process planning problem to be solved and the remanufacturing process case knowledge through a nearest neighbor algorithm, then perform weighted summation on the feature attribute similarities to obtain global similarities, and arrange the search results according to the global similarities.
Preferably, the application module includes:
the query unit is used for querying the remanufacturing process case knowledge recorded on the remanufacturing process case knowledge block chain;
the encryption unit is used for generating a key pair, storing a private key used for creating a signature request and a public key shared with an owner of the remanufacturing process case knowledge, namely a provider, and creating the signature request through the private key;
and the acquisition unit is used for fulfilling a preset intelligent contract after the signature request is confirmed through the public key verification signature, acquiring the retrieved remanufacturing process case knowledge, creating a transaction block recording the transaction information of the remanufacturing process case knowledge by the system, and encrypting the transaction block by the private key of the provider.
Preferably, the block chain generating module includes:
the block generation unit is used for generating a hash code by using an SHA256 hash function, encrypting the remanufacturing process case knowledge stored on the remanufacturing process case knowledge block, and then encrypting the hash code by using a private key by an owner of the remanufacturing process case knowledge to generate a case knowledge block;
the broadcasting unit is used for broadcasting the remanufacturing process case knowledge blocks to all nodes of the remanufacturing process case knowledge block chain and acquiring verification and permission of each node;
the review verification unit is used for decrypting the remanufactured process case knowledge block by utilizing the public key of the node uploading the remanufactured process case knowledge block, reviewing and verifying the basic information;
and the chaining unit is used for linking the remanufactured process case knowledge block to be successfully added to the remanufactured process case knowledge block chain and the last transaction block according to the hash code of the last case knowledge block added to the remanufactured process case knowledge block chain if the verification is passed and the permission of each node is obtained.
An embodiment of the present invention further provides an electronic device, where the device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the processor implements any of the steps of the above-mentioned remanufacturing process planning method based on blockchain and instance inference.
Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, which when executed by a processor implements any of the above steps of the remanufacturing process planning method based on blockchain and instance inference.
Compared with the prior art, the invention has the beneficial effects that:
the invention solves the problem of remanufacturing process planning by combining the blockchain technology and the application example reasoning technology, fully exerts the advantages of the two technologies, and can effectively eliminate the worry of small and medium-sized remanufacturing enterprises about remanufacturing process case knowledge sharing risks by the characteristics of decentralization, non-tampering, collective maintenance and the like of the blockchain, thereby overcoming the limitation that the traditional example reasoning technology is only suitable for sharing and reusing knowledge in a single enterprise.
The embodiment of the invention provides a remanufacturing process planning method, which can ensure safety and efficiency, realize inter-enterprise remanufacturing process knowledge sharing, make up the limitation that small and medium-sized enterprises in remanufacturing lack scientific and effective remanufacturing process case knowledge, assist the small and medium-sized enterprises in planning an optimal remanufacturing process scheme, improve the overall remanufacturing process planning level of a small and medium-sized enterprise alliance in remanufacturing, and realize coordinated development of economic benefit, environmental benefit and social benefit.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
Those of ordinary skill in the art will appreciate that the method steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of clearly illustrating the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A remanufacturing process planning method based on block chain and instance reasoning is characterized by comprising the following steps:
s1, standardizing to represent the remanufacturing process planning problem to be solved;
s2, retrieving remanufacturing process case knowledge through a nearest neighbor algorithm according to the remanufacturing process planning problem after standardized representation;
and S3, acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
2. The remanufacturing process planning method based on blockchain and instance reasoning of claim 1, wherein before the step of S1, the method further comprises:
and acquiring remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form, and constructing a remanufacturing process case knowledge block chain.
3. The remanufacturing process planning method based on blockchain and instance reasoning according to claim 1, wherein the step S2 specifically includes:
and calculating the similarity of each characteristic attribute between the remanufacturing process planning problem to be solved and the remanufacturing process case knowledge through a nearest neighbor algorithm, then carrying out weighted summation on the similarity of the characteristic attributes to obtain the global similarity, and arranging the retrieval results according to the size of the global similarity.
4. The remanufacturing process planning method based on blockchain and instance reasoning of claim 1, wherein the obtaining of the retrieved remanufacturing process case knowledge in the step S3 specifically comprises:
s31, the requester queries the remanufacturing process case knowledge recorded on the remanufacturing process case knowledge block chain;
s32, the requester generates a key pair, stores a private key used for creating the signature request and a public key shared with the owner of the remanufacturing process case knowledge, namely a provider, and creates the signature request through the private key;
and S33, after the provider verifies the signature through the public key to confirm the signature request, the requester fulfills a preset intelligent contract and obtains the retrieved remanufacturing process case knowledge, the system creates a transaction block recording the transaction information of the remanufacturing process case knowledge, and the private key of the provider encrypts the transaction block.
5. The remanufacturing process planning method based on blockchain and instance reasoning of claim 2, wherein the form of the knowledge block comprises:
case knowledge numbering, case problem formulation and problem resolution,
wherein the case problem description comprises: the name, brand, type, material type, failure location, failure characteristics and failure degree of the waste part,
the problem solution comprises: recovery process, recovery equipment information and processing parameters.
6. The remanufacturing process planning method based on blockchain and instance reasoning of claim 2, wherein the process of constructing the remanufacturing process case knowledge blockchain comprises:
s61, utilizing an SHA256 hash function to generate hash codes, encrypting the remanufacturing process case knowledge stored on the remanufacturing process case knowledge block, and then encrypting the hash codes through a private key by an owner of the remanufacturing process case knowledge to generate a case knowledge block;
s62, broadcasting the remanufacturing process case knowledge block to all nodes of the remanufacturing process case knowledge block chain, and acquiring verification and permission of each node;
s63, decrypting the remanufactured process case knowledge block by each node by using the public key of the node uploading the remanufactured process case knowledge block, and looking up and verifying the basic information;
s64, if the verification passes and the permission of each node is obtained, the remanufactured process case knowledge block is linked to the remanufactured process case knowledge block chain to which the remanufactured process case knowledge block was successfully added according to the hash code of the last case knowledge block added to the remanufactured process case knowledge block chain and to the last transaction block.
7. A remanufacturing process planning device based on block chain and instance reasoning is characterized by comprising the following components:
a standardization module for standardizing the remanufacturing process planning problem to be solved;
the retrieval module is used for retrieving the remanufacturing process case knowledge through a nearest neighbor algorithm according to the remanufacturing process planning problem after standardized representation;
and the application module is used for acquiring the retrieved remanufacturing process case knowledge, evaluating whether the remanufacturing process case knowledge can be directly used for solving the remanufacturing process planning problem to be solved, if so, ending the process, if not, modifying the remanufacturing process case knowledge, and adding the modified remanufacturing process case knowledge into a remanufacturing process case knowledge block chain in a knowledge block form.
8. The remanufacturing process planning apparatus based on blockchain and instance reasoning of claim 7, further comprising:
and the block chain generation module is used for acquiring the remanufacturing process case knowledge, expressing the remanufacturing process case knowledge in a standardized manner in a knowledge block form and constructing the remanufacturing process case knowledge block chain.
9. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of a block chain and instance inference based remanufacturing process planning method of any of claims 1 to 6.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of a block chain and instance inference based remanufacturing process planning method of any one of claims 1 to 6.
CN202010082718.5A 2020-02-07 2020-02-07 Remanufacturing process planning method based on block chain and instance reasoning Pending CN111275349A (en)

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