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Copyright of Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper characterized the dietary characteristics of the catering consumer group from sales data of Chinese optional restaurants and predicted the dish sales of the restaurant. Due to the huge changes in the daily dishes served in Chinese optional restaurants, traditional time series forecasting methods can hardly solve the problem. This paper proposed a forecas ting model based on decision theory. It used the MACBETII method and the expected utility theory to transform the restaurant 's dishes into a unified utility value, which served as the basis for the dining group to choose dishes, used the decision weight to represent the dietary characteristics of the consumer group, and then designed a decision model for catering consumers based on the behavioral decision theory. This paper used the running data of Chinese optional restaurants for training. The crossentropy of the prediction model on the training set is 0. 082 and the cross -entropy on the test set is 0 . 086. Compared with the prediction model based on neural network, the model is more accurate and has good interpretability. Therefore, the model can accurately predict the sales volume of Chinese optional restaurants under a given dish supply, thereby supporting the efficient operation of Chinese optional restaurants . [ABSTRACT FROM AUTHOR]

A three-degree-of-freedom fighter model is established to solve the maneuver decision problem in cooperative air combat, and an extended basic maneuver decision set is designed according to the pilot's actual operation in air combat. The air combat situation assessment model is established by constructing angle, velocity, distance and altitude superiority functions. Based on group decision making theory, Cook-Seiford decision making algorithm is designed and applied to the research of multi-aircraft cooperative air combat maneuver decision making for the first time, which effectively optimizes the decision flow. Under the initial situation disadvantage, Cook-Seiford group decision algorithm, Copeland and Dodgson group decision algorithm are used to simulate adversarial air combat under typical air combat conditions of 2 versus 2 and 3 versus 2. The simulation results show that the cooperative maneuver decision algorithm based on Cook-Seiford group decision algorithm can effectively obtain obvious countermeasures advantage, which verifies the effectiveness and superiority of the algorithm designed in this paper, and provides a new idea for using the group decision algorithm to solve multi-aircraft cooperative air combat decision. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Hebei University of Science & Technology is the property of Hebei University of Science & Technology, Journal of Hebei University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to solve the problems of poor volume stability of steel slag and premature cracking of steel slag-asphalt mixture roads, modification via silica colloidal solution immersion of steel slag was carried out. The physical and mechanical properties of modified steel slag, the performance of modified steel slag-asphalt mixture and the modification mechanism of steel slag were investigated through mechanical property test, scanning electron microscope (SEM), road performance test, and the ash target theory decision method was also introduced to synthesize the performance indexes of modified steel slag-asphalt mixture to determine the best modification scheme of steel slag. The results show that the physical and mechanical properties of modified steel slag is significantly improved. The greater the modified concentration of steel slag, the better the high-temperature performance of the asphalt mixture. Extending the modification time of steel slag improves the low-temperature crack resistance of the asphalt mixture, and the water stability of the asphalt mixture is significantly improved after the modification of steel slag. Based on the gray target decision theory, the best modification solution for steel slag is finally determined to be a 24 h immersion in a solution with a modification concentration of 3%. [ABSTRACT FROM AUTHOR]