Advanced Materials Research Vols. 225-226

Abstract: Arithmetic operation and arithmetic expression evaluation are basic operations of a computing model. Based on the rules with priority, this paper discusses arithmetic operation and arithmetic expression evaluation in transition P system. We present the rules of arithmetic operation and the arithmetic of constructing arithmetic expression evaluation’s membrane structure based on the arithmetic operation rules. In the arithmetic operation rules, we use some specifically symbols to make rules applied in a maximally parallel manner, and also assure synchronization need during the rules application.

Abstract: In order to let the combine working in the best condition, it is necessary to control its speed according to the crop conditions in the field. The walking office of combine is analyzed in this paper. It is a high order system, some parameters will change during its working, and it is impacted by external disturbance. Then a servocontroller based on RBF neural network is designed. The model is simplified, and there are 2 parameters in it. Then a RBF neural network is established. The speed of combine, its integral value and differential value are inputted to identify the parameters. The inverse controller is established base on the simple model. The result of simulation and real vehicle tests shows that the controller can effectively adapt to changes in the internal parameters, overcome the external disturbance, and achieve the purpose of tracking a given speed.

Abstract: Regeneration index of depreciated metal products was the index to describe sufficient degree of metal regenerated resources in metal industry. Two approaches for defining the quantities of old aluminum scrap, methods based on aluminum social stock and aluminum products use life, were given. The average use life of aluminum products in China was calculated to be about fifteen years by the weighted average method. Calculating formula for regenerative index of depreciated aluminum products was given, and regenerative index of depreciated aluminum products in the history of China and USA were analyzed.

Abstract: The remarkable interest in the supply chain management related research in the last decade has been due to its potential to improve the efficiency of operations and reduce cost. Vendor managed inventory is an integrated approach for market patricians coordination according to which the vendor decides on the appropriate inventory levels within bounds. The coordination problem for a two stage supply chain composed of a medical equipment supplier and a retailer is considered in this paper. The inventory management of medical equipment vendors under the uncertain demand is analysis and the model is designed, the variables of shortage cost and inventories cost are derived on the two cases with the demand fluctuations and the results are also discussed.

Abstract: This paper adopts the methods of entity type experiment, experience model test, analyze model simulation artificial method to research of strengthen design method of product dependability. It is found that the design need to search and lock risking factors to influence product quality carrying on product dependability and need to set up product reference system of index to weigh properties to construct figure analyze model, mathematics derive model and entity prove testing model, establish function value of terminal parameter to carry on the experiment. The result indicates that implement of product dependability strengthen design need to test foundational test target of pertinence implement model plan using entity test, model emulation, deriving, experience judgement comprehensive method of mathematics to implement experiment plan, lock risk factor, construct risk factor system in order to optimize whole product dependability design plan model.

Abstract: This paper adopts the methods of entity type experiment, experience model test, analyze model simulation artificial method to research of strengthen design method of product dependability.It is found that dependability is strengthened and can launch going on to design at each stages of product design and development, model prototype of machine test link rely on means that entity prove can judge and find quality defect and hidden danger of products accurately in entity especially. Rely on the highly reliable design method to make the performance parameter value of the prototype of the model in a terminal range changed rationally. Terminal parameter includes the most heavy terminal parameter function, minimum terminal parameter function, specified performance parameter, uproar wave interfere intensity. The result indicates that uproar wave interfere terminal of product properties play seriously, uproar wave interfere intensity should be reduced to minimum extent.

Abstract: This paper adopts the methods of analysising and summarizing the primitive information which is from the users to study on how to transfer initial requirements of users and research content into product specific property parameter and functional service project. It is found that it needs to summarize the research materials, to discover structural systematicness, technological detail, man-machine interoperability, semantic symbolic, economic rationality, manufacturing simplicity, model artistry among them, base on the peripheral culture history development system, humanization entity system, rational system, society and politics system, economy environment system, social life environment system of the design object to put forward the solutions centrally, systematically and scientifically. The result indicates that every performance index and function service content of products should take people's physical, mental and emotional tolerance as measure.

Abstract: Resilient S-boxes have many applications in quantum cryptographic key distribution, random sequence generation for stream ciphers, and fault-tolerant distributed computing. In this paper, we provide a novel method of constructing new resilient S-boxes from old ones. The proposed method is a simple modification on the recursive construction technique for resilient S-boxes due to Zhang and Zheng. The modified Zhang-Zheng construction has better performance since it increases the output dimensions of S-boxes, whereas having the same resiliency as the existing method. Using this new method, given an (n, m, t)-resilient S-box, one can construct an ((h+1)^kn, (h+1)^km, 2^k(1+t) -1)-resilient S-box for all h = 2, 3,…, and k =1, 2,….

Abstract: This paper uses the method of model production planning, various of models are woven in the whole product research progress of each link, R&D team should assess and adjust the real role the models playing in time according to the actual product research progress to prevent the model from overlapping in the course of researching and developing. When more broad overlay take place in different model functions, one model function will be reduce greatly when studying and using the function of making technological progress for reference from the previous model, so R&D team should adjust and change the progress of research and working content in time, and cut down production of some little value model prototype in right time and amount in order to raise the development efficiency, reduce research and develop cost.