Advanced Materials Research Vols. 457-458

Abstract: By combining the field theory in natural science and the research on E-commerce system, this paper puts forward the theoretical framework of “synergy field”. Therefore, the quantitative expression of the endogenous disturbance and exogenous disturbance, and the long-term and short-term responses to the disturbance could be contained in a unified theoretical paradigm. It reveals the process and level of the transformation of E-commerce System and makes judgment and prediction on the status and direction of the system’s transformation according to the quantization description of E-commerce system synergy field. On the basis of dynamic mechanism, the paper constructs the cooperative field equations for synergy field and further completes the design of the theoretical structure of the synergy field.

Abstract: Many experiments in research and development in the paint preparation involve mixture components. These are experiments with mixtures in which the experimental factors are the components of a mixture and the response variable depends on the relative proportion of each components, but not on the absolute amount of the mixture. Thus the mixture components cannot be varied independently. A common variation of the mixture experiment occurs when there are also one or more process factors that can be varied independently of each other and of the mixture ingredients, to bring about a mixture–process variable experiment. We discuss the design and analysis of these types of experiments, using flame-retardant coating formulation as an example. Goal of this paper is to encourage greater utilization of these techniques in paint preparation research and development.

Abstract: A differential capacitive accelerometer with four folded springs and changeable area was designed and fabricated. It was composed of upper electrode(proof mass), four folded springs、lower comb electrode. Modal and statics were analyzed by ANSYS, accelerometer was fabricated by bond and ICP etching technology. Detection circuit was fabricated and the test was completed. The maximum measured acceleration is 12g, sensitivity is 86mV/g, and precision is higher than ±4.5%.

Abstract: In the course of producing material pulp, water-content (or the density of material pulp) is a very important process parameter. There are many elements which affect the water-content of material pulp, therefore it is very difficult to build precise mathematical module. In the meantime, the control system is nonlinear and retarded. For such control systems, the classical control system and modern control system is always hard to be applied, but fuzzy control can usually gain good results. This paper briefly illustrates the basic composing frame graph of the fuzzy control system of the automatic measuring and controlling apparatus on water-content in material pulp. We design the fuzzy controller of the automatic measuring and controlling apparatus on water-content in material pulp from these aspects: from the fuzzification of the sendout values, the rules of fuzzy reasoning, the adjustment of fuzzy control rules through the principle of double-factor self-organized fuzzy control, and the précising of the input values, and etc., and give the program frame graph of the fuzzy control algorithm. The successful application of the Intelligence Measuring and Controlling Apparatus on water-content proves that the design of the fuzzy controller is reasonable.

Abstract: Rail gas press welding is a sophisticated process which involves physics, chemistry, heat transfer, material metallurgy and hydromechanics and other subjects concerned. The welding phenomenon includes heat transfer process during the welding, melting and coagulation of the metal, cooling change, welding stress, distortion and so on. In order to gain a fine welding structure, one must design the craft plan properly and scientifically. This paper introduces an automatic rail gas press welding solution, to which the core of DSP is applied to obtain the best welding effect.

Abstract: This paper puts forward a mathematical method for computing the closure extent of object contours—a specific instance of Gestalt law of closure. The method introduces the concept of virtual line to interpret the size of contour gaps vector points and measure the closure extent. Experimental results show that the computation results is consistent with the human perception interpretation in most cases.

Abstract: In this document, the pitch period is detected according to the sensitivity to weak sinusoidal signal and strong immunity ability to noise of Duffing oscillator, at the background of strong noise. And then enhancing pitch obtained by harmonic method. The test results show that the enhancing effect of this method is obvious under low SNR condition, and speech distortion is small.

Abstract: Based on the previous research on decision and optimization of process routing,this paper analyzes the characteristic of process knowledge, establishes the representation methods of process knowledge based on feature. According to the constraints mong process knowledge, decision space of process routing based on process constraints is constructed which improved search efficiency of GA. In allusion to the uncertainty of decision of process routing, the multi-objective optimization function is established, and GA is applied to decision and optimization of process routing. Process routing is optimized using the reasonable coding strategy,objective function, crossover and mutation algorithm. An case is offered to illustrate the process of decision and optimization of process routing based on GA.

Abstract: In this work we consider the problem of designing a secret error-correcting network coding scheme against an adversary that can re-select the tapping links in different time slot and inject z erroneous packets into network. We first derive a necessary condition for keeping the transmitted information secret from the adversary, while the network is only subject to the eavesdropping attack. We then design an error-correcting scheme by combining the rank-metric codes with shared secret model, which can decode the transmitted information correctly provided a sufficiently large q. With that, a secret error-correcting network coding is proposed by combining this error-correcting scheme with secret communication. We show that under the requirement of communication can achieve a rate of packets. Moreover, it ensures that the communicated information is reliable and information-theoretic security from the adversary. In particular, the requirement of packet length is not as large as the required in [12]. Finally, the security and performance analyses illustrate the characteristics of our scheme.

Abstract: It introduces the algorithm of particle filter and the Bayes theory. The way is improved necessarily in the navigation system and then used in it. When one channel in the system is interfered and can’t work, using the changing particle’s weight factors which stand for the emanative channel in the system can control the interferer. The simulation shows the particle filter algorithm can through other channels control the interferer which occurs in the one channel. So the system also can work naturally.