Advanced Materials Research Vols. 204-210

Abstract: Assuming that ATO (assemble-to-order) supply chain is composed of multiple components suppliers and one manufacturer, who adopts JIT replenishment for some components while the others (Q，r) replenishment, this paper developed a components replenishment model for ATO manufacturer under supply chain management to make a study on its mixed components replenishment policies and the production strategies of suppliers, and presents the qualifications for manufacturer adopting JIT replenishment and the algorithm for optimal strategies of supply chain through theoretical and numerical analysis. We found that the manufacturer should adopt JIT replenishment for those components with higher purchase price, long lead time and high variability of demand to reduce the inventory cost of supply chain and increase its profits.

Abstract: In the context of e-commerce boom, network entrepreneurship education carried out by some universities in China plays an important and active role in promoting students’ overall quality cultivation, employment and enterprising, etc. However, researches on the network entrepreneurship education are few and at the initial stage. This paper tried to make an evaluation of universities’ network entrepreneurship education quality and established an evaluation index system from such four dimensions as entrepreneurial spirit, entrepreneurial knowledge and skills, entrepreneurial practice, and social effect. It also built an evaluation model by applying the fuzzy analytic hierarchy process. Empirical study shows that the established evaluation index system has high validity and the evaluation model is of accuracy and strong operability.

Abstract: In production process of continuous casting slab in ferrous metallurgy, in order to realize soft reduction and obtain continuous casting slabs without internal defects, it is important to determine the location of final solidifying end of slabs exactly. In this paper, a set of physical simulation device which simulates detecting the final solidifying end was designed according to similarity theory. Through experimental study and mathematical statistic method, we analyzed the influence of each factor on the detected results. The research results may provide certain guidance for the on-line detection final solidifying end in situ.

Abstract: A new automatic optical polarization demultiplexing method for NRZ-OOK polarization division multiplexed (PDM) system is proposed. The detected power differences of both the direct current (DC) and the radio frequency (RF) are used as control signals which are sensitive to the angles between the polarization controller (PC) and the polarization beam splitter (PBS). The characteristics of those control signals are thoroughly analyzed, and the best RF detection window is calculated out through system simulation.

Abstract: According to climatic characteristics of Zhangjiakou, energy saving rates of residential building which were generated respectively by heat transfer coefficient of different external walls and different external windows and air change rate were calculated and analyzed using Dest-h residential building energy consumption analysis software. Finally energy saving effect of these measures was obtained to provide some references for residential building designing the criterion of 65% energy saving.

Abstract: Knowledge community detection algorithm is a main technical means to knowledge discovery in complex network. It is used to discover the potential community structures to provide a basis for web services, for example, personalized recommendations. In this paper, a parallel algorithm for knowledge community detection based on MapReduce is proposed. This paper, through various experiments, proves that the efficiency of the parallel algorithm is increased significantly.

Abstract: On one hand, parallel machine tool enjoys many advantages over conventional serial counterpart, on the other hand, it also suffers from the disadvantages of coupled position and orientation, difficulty in kinematic modeling, strict requirements for components and difficulty in manufacturing of the spherical joint adopted in some limbs. Hybrid mechanism, however, will serve the turn in some cases. By using a three degree-of-freedoms parallel mechanism and a slide worktable which will fulfill one movement, a novel four degree-of-freedoms hybrid machine tool is put forward. The kinematic solutions are analyzed and closed-form kinematic solutions are given. The methods and theories adopted here can be used for design of other types of hybrid machine tools.

Abstract: This paper studies the impact of organizational slack on the performance of material production and processing firms by using empirical analysis based on the data get from 54 firms in Henan Province by questionnaire. The result shows that organizational slack is positively related to the performance of material production and processing firms. The analysis also finds that there is the inverted U-shaped relationship between organizational slack and performance, but this relationship is not significant. Overall, results highlight the importance of additional research into intervening factors impacting the slack–performance relationship.

Abstract: Research on the account sale only focused on account sale itself, and it can’t support enterprises sufficiently to make decision of account sale in theory and methodology. So considering the impact of account sale on cash sale in the process of account sale of enterprises, the demand shifting of cash sale because of account sale, the cash sale and account sale characteristics in declining period of products and applying the theories of product life cycle (PLC) and dynamic programming, the paper set up the optimal model of decision-making in declining period of life cycle for the purpose of maximizing total profit of cash sale and account sale and made out the optimal starting time, then determined the best credit policy by exploring the relation between the optimal starting time of account sale and enterprises making credit policies. The paper provides certain proof for enterprises to make reasonable and economical credit policies.

Abstract: Aiming at the demerit of the traditional flux coupling driving circuit, an improved driving circuit is proposed which has some advantages, such as simple structure, low cost, the driving source isolated from the main circuit, etc. The proposed circuit can be used on the maximum power point tracking circuit of solar cell which has a wide range duty cycle. The circuit principle analysis is given. At last, experimental results are provided to verify its practicability.