Advanced Materials Research Vols. 225-226

Abstract: A remote distribution based agricultural mechanical fault diagnosis system was proposed against the characteristics of high technology and difficult fault diagnosis in the modern agriculture and the time-sensitive requirements in agricultural production. The paper introduced the overall system architecture and working principle, analyzed the development of site monitoring and diagnostic system, remote diagnosis center, network communication systems, and software systems development, and investigated the system’s main implementation techniques, which include network database technology, data compression and transmission technology and system security technology.

Abstract: With the development of English Teaching, different kinds of teaching reform have been performed in the reform course. In fact, in the course of teaching, there are many teachers trying different ways to develop teaching efficiency. Some reforms are concerned only with teaching ways or methods, but some are concerned with teaching theories. Only with the realization and change of teaching theories can teachers reform their teaching ways. In the paper, the teacher will analyse some successful teaching reforms to reach teaching aims and improve teaching efficiency.

Abstract: Based on the analysis of current kinds of sequence matrixes, Type 1 and Type 2, an expanded and refined sequence matrix was proposed. Then, based on the optimized expanded sequence matrix, an improved sequence matrix was brought forward, which could be easily written in a normalized form and whose calculation was simple and convenient. With operational rules of combined sequence matrixes defined, this expanded sequence matrixes can also be applied to the problems of mixed production lines. Finally, the improved matrix was successfully applied to an example of flowshop balancing problem, and it was implemented in the Excel environment in an automatic computing way.

Abstract: Mass Customization is the most advanced production mode. In Mass Customization Manufacturing (MCM), facility relayout is needed frequently in an instant, costless, seamless and frictionless mode. Three kinds of production line layouts are brought forward which are probably suitable for the MCM. These three types are the child production lines type, the C-shape lines type and the flower type, whose nature characteristics (the optimization of weak coupling relations) are also analyzed. Using a Genetic Algorithm with Sex Differentiation under the concept of quality loss, its model in MCM is built. Then a real small MCM production line in our lab and its digital model in e-Factory are described. Finally, the algorithm was integrated in the model and a petal type production line layout was implemented in a QUEST based simulation system.

Abstract: Evolutionary Multi-objective Optimization (EMO) is a hot research direction nowadays and one of the state-of-the-art evolutionary multi-objective optimization algorithms ——NSGA-II has gain wide attention and application in many fields. Gene Expression Programming (GEP) has a powerful search capability, but falls into local optimum easily. Based on the transformed GEP, NSGA-II and the virus evolution mechanism, a new multi-objective evolutionary algorithm GEP Virus NSGA-II is proposed. With the infection operation of virus population, the diversity of the host population is increased, and it’s much easier to jump out of the local optimum. And this algorithm has got good experimental results on 9 standard test problems.

Abstract: Minkowski sum has become an effective method in collision detection problem, which is a branch of computation geometry. Separated from the previous algorithm based on the traditional Gaussian Map, a new algorithm of computing exact Minkowski sum of convex polyhedron is proposed based on direct mapping method in the paper, and the correctness of direct mapping method is testified. The algorithm mapping the convex polyhedron into the bottom of regular tetrahedron according to the definition of Regular Tetrahedron Mapping and Point Projection, so the problem become form 3D to 2D. Comparing with the previous algorithm, the algorithm posed in the paper establishes mapping from 3D to 2D directivity, and only compute the overlay of one pair of planar subdivision. So, the algorithm’s executing efficiency has been improved in compare with the previous algorithm.

Abstract: The grey forecasting model has been successfully adopted in various fields and its accuracy is closely related with the original data. Improving the smoothness of the original sequence can increase the accuracy of GM(1,1) model and many researchers have done such work about the original sequence improvement. The paper adopts moving average operation on the original sequence and gets the new sequence with good smoothness. In the process of the establishment of GM(1,1) model the paper adopts the integral method to get the background values and expand the equal interval into the unequal interval. The examples show the method can fit and predict the system development more accurately which provides a new way for the data processing.

Abstract: Based on the ZigBee technology, Home monitoring system has been designed and implemented in Wireless Sensor Network, intelligent wheelchair, and communication modules. The system works on the existing TD-SCDMA network. The working principle of the system, hardware and software designing are described in detail. After the test, the information collection of indoor environment and user physiological indexes were realized well, and could transmit in time. The purpose of remote monitoring has been achieved. This system has high practical value.

Abstract: The aquifer thermal energy storage (ATES) system can make use of the heat of summer and the cold of winter, despite in different seasons, which can help to reduce the usage of the fossil fuel effectively, as a result, the atmospheric pollution can be reduced. This article firstly summarized the fundamental principles and the classifications of the ATES, and it also deduced and established the ATES mathematical model, and then numerical difference arithmetic was used to program so as to gain the simulation results. On the basis of the above, the author looks forward to the prospective of the aquifer thermal energy, and also provides the references to the applications of the ATES and the studies of the underground water source heat pump.

Abstract: Now human error has caused lots of accidents of dam break, but there is no direct method to calculate the probability of human error in dam risk analysis. So the paper invite the suggestion of introducing the human reliability into dam risk analysis, which can perfect the dam risk theory. It used improved HCR(Human Cognitive Reliability) method to calculate human reliability of dam risk, but the concrete parameters need further research combined with engineering practice.