Advanced Materials Research Vols. 143-144

Abstract: Chebyshev-Legendre pseudo-spectral method was applied to resolve the modified Kawahara equation. The proposed approach is based on Legendre-Petrov Galerkin formulation but only the Chebyshev-Gauss-Lobatto nodes are used in the computation. The Petrov method is considered for the unsymmetry of the fifth-order derivative term appeared in the modified Kawahara equation and Chebyshev-Legendre method is used for reducing the computational complexity. Numerical tests are presented to verify the efficiency of the proposed approach.

Abstract: A wavelength tunable optical filter based on a fiber Bragg grating using piezoelectric bimorph is realized in this paper, and the tuning condition is theoretically and experimentally analyzed. The Bragg central wavelength of the filter can be easily tuned adopting to a DC voltage. The maximum strain of the central wavelength depends upon the maximum operating voltage, and the tuning range efficiency was as high as 1.2pm/V, the reflectivity, shape and the reflective spectrums of the fiber Bragg grating central wavelength almost keep unchanged before and after tunning. This paper provides a reference for optical fiber Bragg grating tuner.with high efficiency.

Abstract: Distribution tasks have typical feature of context dependence. Attaining the mission-related dynamic context information service timely and accurately has a significant effect to the execution efficiency of the distribution task. On the basis of the definition of four distribution contexts systematically: network context , product context, customer context, resource context, this paper proposes the model of context management of distribution task, and the collaborative service and process mechanism of distribution tasks base on task context, it is of great value and significance to support the effective implementation of collaborative management of the distribution task in dynamic environment.

Abstract: . During the software developing, more and more software designments are failed because of the requirements change. Requirements change has becoming the main error source of software developing, and it directly influences the quality of software. In this paper, we analyze the types of requirements change and its influence on the software developing. Our analysis will provide references for implement of the requirements change in software developing.

Abstract: The cut sequence describes the failure mode of the dynamic system, whose dynamic behaviors make the generation of cut sequence set very complicated. This paper brings forward the conception of extended cut sequence, which is incorporated with temporal logic and has more expressive capability than previous similar conceptions. According the type of logic gate, the minimal extended cut sequence set is generated using the basic set manipulation (union, intersection, difference and product). The expression form and generation process based on extended cut sequence are more efficient than that based on traditional cut sequence. As an example, apply this method to a famous hypothetical dynamic system. The system is modeled by dynamic fault tree and the minimal extended cut sequences are generated and analyzed. The result shows that this method can quickly acquire precise minimal extended cut sequence set.

Abstract: Green manufacturing is the embodiment of the strategy for sustainable development of human society in the field of manufacturing sector. The manufacturing of parts and components can not carry out without mechanical processing. The environmental pollution caused by the traditional mechanical processing technics is very serious, especially the emissions of waste water and waste liquid during the process of machining. This paper discussed several mechanical processing technics geared to green manufacturing which are beneficial to the environmental protection, such as the dry cutting, quasi-dry cutting, low temperature air-cooling cutting, high-speed cutting as well as the near net shape forming, and finally drew the conclusion that the new mechanical processing technics combined with green technology with full consideration of the carrying capacity of resource and environment is an important part of green manufacturing in the future.

Abstract: Based on the view of technical economics, improve on the agricultural value-added model through the introduction of new variables; format the value-added model of coal chemical products. Then take the development of coal chemical industry chain of Yulin City in Shaanxi Province for example, educe the necessity to upgrade its industrial chain. In addition, discuss the strategy to promote coal chemical industry chain from the perspective of strengthening the building of coal chemical industry chain and improving value-added.

Abstract: During the processing of handwritten Chinese characters recognition, pretreatment and segmentation has great effect to the recognition. On the base of review upon the often-used algorithm, the article proposes the methods which get the connected domain of binary image use the non-recursion Marking algorithm, and design the algorithm to coherent noise and delete image frame line and segment the character. The article segment the character in the whole scope with the connected domain merging algorithm to overcame the difficult about the tilt; and segment the Chinese character in the part scope with the projection to overcome the difficult about conglutination. The fact proved that this algorithm solves the problem by using single method.

Abstract: Based on the database of cotton boil spoiling disease in Xinxiang, a computerized intelligent expert system was established by using the Reverse Model of artificial neural network. With its speediness, robustness and 100%predicting accuracy, the system can be used as an effective method to predict the trend of cotton diseases. In recent years, we have seem some reports for which use artificial neural network system to forecast the disease of crops, but the artificial neural network using for predicting cotton boil spoiling disease have not been seen yet. Xinxiang is a city of Henan province of china, according to the survey materials of 10 years, the high output cotton boil spoiling disease break out every 4 years, the average quantity is 1.53, the rate of boil spoiling disease is 11.84%, so the loss is 168.28 . In order to prevent the cotton boil spoiling disease, we should forecast the disease, by doing this, it can increase quantity and quality of the cotton.

Abstract: Immune-SoftMan (ISM), a new concept, is an immune intelligent entity. ISM lives and acts in the computer network environment. It has great capabilities to deal with some things in certain circumstances without manual intervention and supervision. Comparing with Agent and Robot, ISM not only has more all-around humanized intelligence, humanized behavior and function, but also has the ability of environment identifying, network migration, self-determination and free will. In this paper, the concept, characteristics and individual overall model of ISM are presented. This system model can monitor the distributed dynamic network environment in real time, and alarm and diagnose faults in advance. On the basis of these, a novel ISM architecture is constructed and discussed. The presented architecture can achieve a self-organizing system that is more robust and flexible in dynamic network environment, and can be self-updated locally. ISM’s theory and technology fruits also provide a good foundation and reference for studying the present network security system.