11 results about "Fuzzy operators" patented technology

The invention discloses an article label identification method based on fuzzy logic control. The method comprises the following steps: S1, data acquisition; s2, preprocessing the image data and the environment data; s3, performing classification according to an improved clustering algorithm to generate an initial fuzzy rule base; s4, using an improved genetic algorithm to optimize the initial fuzzy rule base, adopting adaptive variation and crossover operation, introducing an elitist retention mechanism, designing a multi-objective optimized fitness function, and generating an optimized fuzzy rule base; s5, constructing a three-layer fuzzy system; s6, fusing three layers of reasoning results through a fuzzy operator to obtain a final label identification result, and if the reasoning confidence is relatively low, performing reasoning again; and S7, storing related data, and if the user corrects the identification result, automatically triggering the improved genetic algorithm to update the fuzzy rule base and the reasoning parameters. Article label identification is optimized through multi-level fuzzy reasoning and the improved genetic algorithm, and the method has the advantages of high adaptability, high precision and the like.

The invention discloses a multivariate factor optimization production feeding scheduling method and system based on a fuzzy operator, and the method comprises the steps: 1), obtaining an order set and the stock of various materials, and carrying out the ascending sorting according to the sorting reference value of orders, and obtaining an initial order queue; 2) traversing each order in the initial order queue, and performing state updating and state subtraction to obtain an intermediate order queue in which the total consumption of different materials of each traversed order is not greater than the stock and the comprehensive priority score of each traversed order is accumulated to be the highest; and 3) selecting the intermediate order queue corresponding to the highest accumulation of the comprehensive priority scores of all the orders from all the intermediate order queues as an optimal order queue so as to carry out production supply scheduling. The method has the advantages of improving the order punctual delivery rate, improving the comprehensive priority score, shortening the scheduling response time and the like.

The invention relates to the field of tourism data analysis, in particular to a tourism comment sorting method based on fuzzy logic, which comprises the following steps: crawling tourism comment information publicly published in a tourism website, performing index data decomposition according to comment subject classification data of the tourism comment information, and performing fuzzy description on each decomposed index data to obtain a fuzzy description result; and obtaining the sorting score of each comment theme by using a fuzzy operator, and outputting a final sorting result based on the score. According to the method, the tourism comment data which is obtained by a crawler and is preprocessed is used as input, sorting of the data is achieved through a sorting method that multi-index calculation, fuzzy operator sorting and tourism comment theme sorting results are used as output, and the tourism comment sorting efficiency and accuracy can be effectively improved.

The present invention discloses a dissipative sliding mode control method under the Delta operator framework. The method is as follows: establish a dynamic model of a T-S fuzzy Delta operator system with time delay and external disturbance; design a fuzzy state observer for the dynamic model; obtain a corresponding observation error system according to the dynamic model and the fuzzy state observer; construct a fuzzy sliding mode surface and a fuzzy sliding mode controller; obtain the discriminant conditions for ensuring the asymptotic stability, strict dissipativity and reachability of the sliding mode surface of the fuzzy state observer system and the observation error system through the Lyapunov stability method, the Delta operator method and the convex optimization method; according to the discriminant conditions, obtain the fuzzy state observer gain matrix and the fuzzy sliding mode controller gain matrix and substitute them back into the fuzzy state observer and the fuzzy sliding mode controller. This method can achieve dissipative sliding mode control of a T-S fuzzy Delta operator system with time delay and external disturbance.

The present application relates to the technical field of drainage board, and particularly relates to a fuzzy comprehensive evaluation method, equipment and medium for degradable drainage board degradation performance, which comprises the following steps: preparing PLA / PBAT composite modified degradable drainage board and burying the drainage board in soft soil samples or simulated soil solution environment; testing initial performance of the drainage board and mechanical properties, hydraulic performance and molecular structure related indexes of the drainage board at different predetermined ages; performing dimensionless processing on the test indexes to obtain corresponding retention rates and glass transition temperature retention degrees; based on the dimensionless indexes, constructing an evaluation index factor set and a comment set, determining index weights by using a combination method of entropy weight method and analytic hierarchy process, and performing fuzzy comprehensive evaluation by using minimum upper bound and type fuzzy operators to calculate a comprehensive evaluation score; combining with an engineering predetermined safety threshold, determining a drainage board degradation completion time or a reasonable service upper limit according to a change curve of the comprehensive evaluation score with the age, and constructing a multi-index evaluation system, which reduces engineering risks caused by single index evaluation.

The invention discloses a comprehensive evaluation method and device for the health condition of a drainage pipe network and a medium, and relates to the technical field of drainage monitoring, and the method mainly comprises the steps: carrying out the construction of a judgment matrix for each evaluation element of a criterion layer based on a relative importance score between factors; obtaining a maximum characteristic value of the judgment matrix and a corresponding characteristic vector thereof, and performing normalization processing to form a weight vector of each evaluation element; establishing a fuzzy evaluation set for each evaluation element and the corresponding evaluation item, and determining a membership degree vector of each evaluation item in the index layer to each grade of the fuzzy evaluation set; performing synthesis operation on each evaluation item in the evaluation elements based on a fuzzy operator to obtain a fuzzy comprehensive evaluation result of the corresponding evaluation element; and according to the fuzzy comprehensive evaluation result of each evaluation element, combining the weight vector of each evaluation element, and performing synthesis again to obtain a comprehensive evaluation result of the health condition of the drainage pipe network. The operation efficiency and the service level of the drainage pipe network are improved.

The invention relates to the technical field of landslide evaluation, in particular to a surface mine slope landslide disaster early warning method based on a fuzzy comprehensive evaluation method, which comprises the following steps: determining the membership degree of each evaluation factor in an evaluation factor set based on a factor comment set, quantizing a fuzzy evaluation matrix representing a fuzzy relationship among the evaluation factors according to the membership degree; constructing a self-adaptive weight for each evaluation factor; and selecting a fuzzy operator, performing fuzzy calculation on the adaptive weight and the fuzzy evaluation matrix of each evaluation factor by using the fuzzy operator, and constructing a dynamic quantitative model. According to the method, a fuzzy comprehensive evaluation method is used for evaluating the landslide risk, multi-attribute and multi-level evaluation factors are covered, the comprehensiveness of evaluation criteria is improved, the evaluation effect is ensured, and a dynamic quantitative model for evaluating the landslide risk of the mine slope in real time is constructed in combination with an adaptive mechanism. The slope landslide risk is continuously monitored, and the applicability of slope landslide evaluation is enhanced.

The invention relates to a technical standard implementation evaluation method and device based on a fuzzy theory, and the method comprises the steps: determining all levels of evaluation index discourse domains U of an evaluated object executing a technical standard; according to the implementation degree of the technical standard, determining a comment set discourse domain V, V = {good, general, poor and extreme difference}; according to the weight of each evaluation index, a fuzzy relation matrix is generated, and the fuzzy relation matrix is used for indicating the degree of membership of the evaluation indexes in the evaluation index discourse domain U to the comment set discourse domain V; performing fuzzy synthesis operation on the weight of each evaluation index and the fuzzy relation matrix by using a preset fuzzy operator to generate an evaluation vector of the evaluated object; and the implementation of the technical standard is evaluated according to the evaluation vector, so that the problem of lack of implementation and supervision of a standardization system in related technologies is solved, and the effect of accurately and efficiently evaluating the implementation of the technical standard is realized.

The invention discloses a multistage fuzzy comprehensive evaluation method for exoskeleton efficiency enhanced heavy protective clothing, and the method comprises the steps: employing a Delphi consultation method to combine with the function and application scene of the exoskeleton efficiency enhanced heavy protective clothing, and determining a multilayer evaluation index system for evaluating the wearing comfort, the equipment efficiency and the practicality; setting a quantification rule for each evaluation index in the evaluation index system; constructing an indirect discrimination matrix by introducing an importance degree sorting index, performing consistency check to obtain a subjective weight of the evaluation index, obtaining an objective weight of the evaluation index by adopting a CRITIC method, and performing linear combination on the subjective weight and the objective weight according to a principle of solving an equilibrium solution by a game theory to obtain an optimal combination weight; and selecting a membership function according to the numerical characteristics of each evaluation index, determining a comment set, constructing a fuzzy discrimination matrix of the evaluation indexes to the comment set, and performing fuzzy operation by using the optimal combination weight and a fuzzy operator to obtain a fuzzy comprehensive evaluation result.

Embodiments of the present disclosure relate to methods, systems, and computer program products for observation data evaluation. In a method, a hierarchical relationship between a plurality of observation items is obtained based on a dataset including a plurality of observation samples. Here, an observation sample in the plurality of observation samples includes a group of measurements for the group of observation items, respectively. A plurality of evaluation models for evaluating an observation sample is generated based on the hierarchical relationship according to a predefined group of membership functions and a predefined group of fuzzy operators. An evaluation model is selected for a further evaluation from the plurality of evaluation models based on a plurality of confidence intervals for the plurality of evaluation models. With these embodiments, the evaluation model may be obtained in an easy and more effective way.

The application discloses a multi-objective vehicle path optimization method based on fuzzy time window satisfaction degree, which is suitable for a distribution scene containing a distribution center, vehicles and customer sites. The method first acquires customer coordinates, demand, time window and other data and calculates a distance matrix, generates a disturbed time window after disturbance on the basis of random disturbance of the deterministic time window, and represents the disturbed time window as a three-parameter fuzzy number [a, m, b]. The fuzzy arrival and service time are obtained through fuzzy operator recursion. Then, a quasi-trapezoidal membership function is constructed to calculate customer satisfaction and average satisfaction through barycenter and similarity. A heuristic and roulette are used to generate an initial population, and a distribution cost Cost and average satisfaction AvgMu are used as double targets. After non-dominated sorting, tournament selection, crossover and mutation evolution, the solution quality is optimized by combining local search, and the Pareto optimal solution set is output after the termination condition is met. The application integrates the uncertainty of the time window into optimization, balances the cost and satisfaction, and improves the path robustness.