Differed from the existed applications of generalized stochastic Petri net(GSPN) theory in machine-tool manufacturing system, reliability computation of FMS, testabilityparameters determination and fault analysis, a n...Differed from the existed applications of generalized stochastic Petri net(GSPN) theory in machine-tool manufacturing system, reliability computation of FMS, testabilityparameters determination and fault analysis, a new idea of applying GSPN to model and performanceanalysis for the serial and parallel production system is proposed. And one typical discrete eventdynamic system (DEDS), turner-unit of palletizing system, is taken as a real case to research. Basedupon the established GSPN models, the working performances of serial and parallel layout arecompared. Furthermore, their differences of working mechanisms including feeding mechanism,coordinating mechanism and monitoring mechanism are discussed. Thus the theoretical basis which ishelpful to appraise layout plan and its reasonableness is provided. Meanwhile, the research resultsshow that parallel layout is more advantageous to greatly improve the operational speed ofproduction system than serial one.展开更多
The ordered event model is improved to describe serial production lines with limited buffer sizes. The improved model hasthe same computational burden as the original one and can be constrUcted directly according to g...The ordered event model is improved to describe serial production lines with limited buffer sizes. The improved model hasthe same computational burden as the original one and can be constrUcted directly according to given principles. Several simulationexamples are cited to verify this improved model. Extensions and open problems are also indicated. By means of this new model, serialProduotion lines with limitations of resources can be stUdied analytically.展开更多
In order to apply the knowledge based engineering to solve the low efficiency of serialized design,by analyzing the top-down design characteristics,a composite representation method for the design knowledge is propose...In order to apply the knowledge based engineering to solve the low efficiency of serialized design,by analyzing the top-down design characteristics,a composite representation method for the design knowledge is proposed.The object-knowledge is expressed by framework,and the construction principles of the framework are given,the design knowledge element is used to express the process-knowledge.Then the knowledge reasoning model for design decision-making is established.Finally,a case shows that the proposed method and model are effective.展开更多
The tuber of the multiflower knotweed, both white and red, is a precious Chinese herbal medicine for boosting the liver and kidneys and enriching the blood. According to legend, taking the medicine helps people turn g...The tuber of the multiflower knotweed, both white and red, is a precious Chinese herbal medicine for boosting the liver and kidneys and enriching the blood. According to legend, taking the medicine helps people turn gray hair back to black, recover their youth, and delay ageing.展开更多
Yimnlong brand serial products anufactured by the Xiangyang Hemp and Cotton Textiles Corp. include 18N, 24N, 32N and 48N pure hemp yarn; 10N, 21N, 32N and 45N pure cotton yarn; 11N, 21N/2 and 11N/2 hemp/cotton yarn; a...Yimnlong brand serial products anufactured by the Xiangyang Hemp and Cotton Textiles Corp. include 18N, 24N, 32N and 48N pure hemp yarn; 10N, 21N, 32N and 45N pure cotton yarn; 11N, 21N/2 and 11N/2 hemp/cotton yarn; and 32N, 40N and 45N polyester/cotton year.展开更多
In this paper, the efficiencies of two production lines, one is with commonly, the other is with separately buffer capacities are compared, the result is that the former one is better than the latter
基金This project is supported by National 863 Hi-Tech Project of China (No.512980106) Provincical Natural Science Foundation of Zhejiang (No.ZD0107).
文摘Differed from the existed applications of generalized stochastic Petri net(GSPN) theory in machine-tool manufacturing system, reliability computation of FMS, testabilityparameters determination and fault analysis, a new idea of applying GSPN to model and performanceanalysis for the serial and parallel production system is proposed. And one typical discrete eventdynamic system (DEDS), turner-unit of palletizing system, is taken as a real case to research. Basedupon the established GSPN models, the working performances of serial and parallel layout arecompared. Furthermore, their differences of working mechanisms including feeding mechanism,coordinating mechanism and monitoring mechanism are discussed. Thus the theoretical basis which ishelpful to appraise layout plan and its reasonableness is provided. Meanwhile, the research resultsshow that parallel layout is more advantageous to greatly improve the operational speed ofproduction system than serial one.
文摘The ordered event model is improved to describe serial production lines with limited buffer sizes. The improved model hasthe same computational burden as the original one and can be constrUcted directly according to given principles. Several simulationexamples are cited to verify this improved model. Extensions and open problems are also indicated. By means of this new model, serialProduotion lines with limitations of resources can be stUdied analytically.
基金the outsourcing project of the AECC Sichuan Gas Turbine Establishment and the science and technology project of Sichuan province(grant number 2019YFG0312)。
文摘In order to apply the knowledge based engineering to solve the low efficiency of serialized design,by analyzing the top-down design characteristics,a composite representation method for the design knowledge is proposed.The object-knowledge is expressed by framework,and the construction principles of the framework are given,the design knowledge element is used to express the process-knowledge.Then the knowledge reasoning model for design decision-making is established.Finally,a case shows that the proposed method and model are effective.
文摘The tuber of the multiflower knotweed, both white and red, is a precious Chinese herbal medicine for boosting the liver and kidneys and enriching the blood. According to legend, taking the medicine helps people turn gray hair back to black, recover their youth, and delay ageing.
文摘Yimnlong brand serial products anufactured by the Xiangyang Hemp and Cotton Textiles Corp. include 18N, 24N, 32N and 48N pure hemp yarn; 10N, 21N, 32N and 45N pure cotton yarn; 11N, 21N/2 and 11N/2 hemp/cotton yarn; and 32N, 40N and 45N polyester/cotton year.
文摘In this paper, the efficiencies of two production lines, one is with commonly, the other is with separately buffer capacities are compared, the result is that the former one is better than the latter
