Advanced Materials Research Vols. 201-203

Abstract: According to the features of lithium ion battery packs, a distributed battery management system (BMS) for battery electric vehicle (BEV) is designed in this article. The BMS consists of a master module with several sampling modules. The kernel of master module is TMS320C2812 digital signal processor, and the kernel of sampling module is P87C591 singlechip. The main functions of master module include estimation of state of charge (SOC) and security management of lithium ion battery packs, and the main functions of sampling module include battery information collection and CAN bus based communication. SOC estimation method based on Extended Kalman filtering (EKF) theory is adopted in this article to precisely estimate the SOC of lithium ion battery packs.

Abstract: For the parrel bolt of Egongyan Yangtze River Bridge uses rust-proof paint which can easily come off, workers should often examine cable and re-paint. Without repairing in time, bolt will be rusty in a short time, which causes serious problems. According to the present state of naked bolt of Egongyan Yangtze River Bridge, we investigate the corrosion action of high effective paint stripper and conduct an analytic experiment, using high effective paint to remove the paint of naked high-strength bolt and testing four engineering plastics in a high temperature and freezing temperature. Through a comparative analysis, we adopt MC-PA for protective cover and load it on the top for bolts, achieving a good protective effect.

Abstract: To improve the general performance of knee-joint rehabilitation trainer (KRT), an embedded control system for the KRT based on embedded linux OS was designed, taking 32bits processor S3C2440 as core control unit. The overall scheme, hardware and software architectures of the system were designed. The key technologies dealing with the embedded linux drivers and the applications based on QT were studied. Experimental results proved that the designed embedded control system is reliable, easy to handle, and can control the KRT to realize isokinetic continuous passive motion and isokinetic active resistance motion. This can provide the guidance for the design of embedded control system in similar medical devices.

Abstract: An evaluation index system for the coordinated development of the manufacturing and logistics industry (hereafter CDMLI) was established in this paper. An assessment and analysis model for CDMLI was constructed utilizing DEA method; and an empirical research was carried out based on 18 years’ data in China. It was found that the general effect of CDMLI in China was just at a normal level.

Abstract: In this paper, we focus on the need for researching the performance of clothing materials. It chose the knitting fabric to be the object of study, and took the performance tests, which include basic performance, style, comfort and clothing comfort. After that, it analysis that these three variables— “fibers”, “yarn properties” and “fabric performance”— influence clothing thermal-wet comfort. The statistic analyses include one-way ANOVE, correlation analysis and principal component analysis. Based on the contrastive analysis of test results, it can be gain the effect of these three variables on clothing comfort.

Abstract: Large amount of methane is emitted into the atmosphere by mine ventilation and methane drainage systems each year. In this paper, a mixer is developed, which can mix drained coal mine methane with ventilation air methane to be oxidized together in the thermal flow-reversal reactor. The mixing process and the effects of the structural parameters of the mixer on the mixing effect are numerical investigated. The calculation results indicate that reducing the maximum injector diameter will lead to worse uniformity of the mixture. While the uniformity can be improved with increasing the injector angle from 30 to 45 degree, and the improvement is more obvious by reducing the injecting hole diameter under the sum area of the injecting holes fixed. This work is helpful to improve the design of the mixer.

Abstract: Teacher performance appraisal in college is important to stimulate teachers’ motivation and promote college development. Teacher is a special group in society, based on the several appraisal principles, to make reasonable performance appraisal system of them. It can strengthen staff construction in college and make significance to its development. This paper brings Balanced Scorecard to evaluate teachers’ performance, and follows equality principle to make comprehensive teacher performance appraisal in college.

Abstract: The thermal-mechanics coupling rule and analytic method of coupling based on principle of cellular automation (CA) have been put forward for the sake of solving coupling effect problem of multi-physics field on the milling insert during milling. The evolution rule of stress function was derived on milling insert according to thermal elasticity by analysis of thermal-mechanics coupling of milling insert based on principle of CA. The temperature change function of the milling insert was deduced in the event of fixed cutting parameter based on heat transfer theory. The local rule of CA on thermal-stress of milling insert was established. The influence factor and distribution regularities of thermal stress were obtained. Compared the numerical-value result of analysis on thermal-mechanics coupling based on principle of CA with analytic result of finite element method(FEM), the effectiveness of CA method was testified. A way of analysis with flexibility was provided for coupling problem of thermal stress field and mechanical stress field for milling insert. The theory basis of research was provided for optimum structural design of indexable milling inserts.

Abstract: Building energy consumption is a vital part of the total energy consumption in China, it is meaningful to predict the building energy consumption exactly as it is useful in the effective implementation of energy policies and is propitious for further expansion of the housing industry. In this paper, based on the factor analysis theory to reduce the dimension of the building energy consumption index, hybrid models of BP neural network and Least Squares Support Vector Machines are constructed respectively to predict the building energy consumption. Relevant data is collected from National Bureau of Statistics of China (1981~2009). Data analysis shows the proposed models, especially based on LS-SVMs, have more steady performance and higher accuracy.

Abstract: According to the national standard, this paper presents the evaluation indexes of power quality and the classifications of each index. The method integrates advantages of both G1 and entropy weight coefficient method. Also, it establishes an fuzzy synthetic evaluation for power quality evaluation by fuzzy theory. 5 observation points on the power quality was graded. The test shows that the combination weighting evaluation model based on fuzzy synthetic evaluation can evaluate the power quality comprehensively and effectively.