Applied Mechanics and Materials Vols. 63-64

Abstract: At present a set of wholly mature design methods of impeller theory based on existential experiences do not exist, because of the complexity of internal flow characteristics of centrifugal fan. Therfore it will undoubtedly provide helps for the improving of existing mehtods to fully master the existed successful experience. Based on statistical datas, some new methods used to determine the main geometric parameters of centrifugal fan’s impeller was proposed in this paper.The paper analyzes the internal relations between a large number of existing aerodynamic sketches and performance parameters of centrifugal fans by means of statistical method and finds regularity, so provides help for simplifing calculation procedures and improving the reliability of impeller design.

Abstract: By analyzing the storage structures of forest and binary tree, this paper introduced the design ideas of the non-recursive simulation on the recursive algorithm of binary tree reverting to its corresponding forest, gave the non-recursive simulation algorithm in C using stack structure and loop structure, and then analyzed and evaluated the recursive and non-recursive algorithms on the two aspects of time complexity and space complexity.

Abstract: The stray capacitance in the process of MEDM has been the key problem of influencing the processing dimension and precision. This paper puts forward a method of measuring the stray capacitance of MEDM machine tool, through recording the charging waveform of two cases that the RC pulse power is on the machine tool or not by an oscilloscope, and then the measured data are substituted for the capacitance charging formula, we get the stray capacitance value of MEDM machine tool. This paper also tests the cases of different charging voltage and different tool-electrode length, finally we find that the tool-electrode length has a big influence on the stray capacitance.

Abstract: IC packaging equipment movement speed, high precision positioning, Requires not only high-rigidity mechanical structure, but also the velocity of the best planning, to meet the increased velocity under the positioning accuracy. In this paper, optimal control agencies to complete the first set point welding rod motion planning.

Abstract: In recent years, the internal combustion engine has been widely used through technological advances to improve its environmental performance. Mechanical and electrical integration of the engine turbocharging system is based on conventional turbocharging system to increase motor in parallel with the turbocharger and the corresponding reversible energy storage components, so that achieve by adjusting the energy input or output direction and the size of the motor to adjust the exhaust turbocharger operating point and the gas supply function. According to matching requirements of light vehicle diesel engine, the analysis model of exhaust gas energy is obtained through qualitative analysis of exhaust gas energy in turbocharged diesel engine.

Abstract: The main work of this paper was the following: based on various effects on train running imposed by operation conditions, showing the effect to train running speed by ramp; under different situation, forming automatically calculating control value of train running process through the highest speed tactics of traction and designing automatically calculating train traction calculating software under the single-particle model. The calculation of train running speed and its zonetime is the main function of train traction calculation software. Lastly, utilizing automatically calculating function, train running process of different teams, limited speed and running route is calculated and the validity, correctness and practicability of the automatic train traction calculation software are testified according to the contrastive analysis of automatically and manual cases.

Abstract: This study developed a lactic-acid beverage of Ganoderma lucidum fermented soybean liquid, and used DMAIC to improve soybean fermentation with Ganoderma lucidum. The Taguchi method was utilized to determine the important factors for improvement. The range of parameters (inoculation amount, dissolved oxygen content, and temperature) greatly affecting the process served as reference for controlled factor levels in the Taguchi method. The Taguchi method analyzed the contribution rates of various control parameters and obtained the optimal control factor combinations, with the highest Polysaccharides target value. The inoculation amount was 6%, dissolved oxygen content was 90%, and temperature was 30°C. By using the same fixed factors, Ganoderma lucidum Polysaccharides was 2.59-4.56 g/kg and 4.46-4.63 g/kg, before and after improvement, respectively. The process can increase Polysaccharides yield from Ganoderma lucidum and stabilize the yield rate.

Abstract: This study first introduced product life cycle management procedures for designing expert questionnaire, and employed the Delphi method to investigate managerial functions of an intelligent manufacturing system in order to demonstrate performance of preliminary research results. Following that, the intelligent manufacturing management system was constructed, and weighted values of management functions were collected. The management function performance was evaluated through value analysis in order to determine whether system functions meet corporate goals. All functions were obtained using the hierarchic analysis method in value engineering analysis. The rational function weights were guaranteed through hierarchy consistency, and compared with the labor costs of operating such system functions to analyze whether the functions were in a suitable domain. After a two-phase investigation, based on expert comments and application functions, production control based on an intelligent manufacturing system can reduce personnel and time costs, thus, effectively increasing corporate competitive power.

Abstract: This paper applies public governance theory to develop a model for controlling the quality and safety of vegetable, and analyzes the process of which government, vegetable suppliers, and vegetable cooperatives take party in vegetable safety governance. Based on the model analysis, our view is that the performance of vegetable safety governance can not improved only by the government. When the vegetable suppliers and the vegetable cooperatives participate in controlling vegetable safety, the governance performance can be improved effectively. The conclusion of model analysis is that the improvement of controlling vegetable safety should be based on the mechanism of which government, vegetable suppliers, and vegetable cooperatives participates in controlling quality and safety of vegetable together.

Abstract: Cluster supply chain risk contains weakened supply chain risks in cluster environment and suppressed cluster risks under the effect of supply chain. It has own risk system of unique characteristics, which is different from the supply chain risk and cluster risk. This paper is to discover and analyze operational risks of cluster supply chain networks on the basis of fully understand in their characteristics and the types ,and propose network governance to deal with and to avoid the cluster supply chain risks.