Advanced Materials Research Vols. 291-294

Abstract: Considering the increase of the driving current for nano-node MOSFET devices, source/drain (S/D) site etched and refilled with SiGe material is a promising process to promote the channel mobility due to the tensile or compressive effect. Using SiGe-S/D process comparing the performance with Si-S/D and control devices on (110) wafer to probe the nano-scale mass-production possibility is a good integration. Besides the discussion in the room temperature, the device characteristics with temperature dependence are more impressive. Through analysis for the cumulated data, the temperature impact in the performance of long channel MOSFETs is higher than that in the short channel ones. The phenomena can be attributed to the tensile or compressive effect to n- or p-MOSFETs with phonon scattering disturbance.

Abstract: This paper presents a feasibility step in the development of biomimetic microrobotic insects. Advanced engineering technologies available for applications such as the micro-electro-mechanical system (MEMS) technologies are used. A flapping-wing flying MEMS concept and design inspired from insects is first described. Then different kinds of materials used feasibly for flapping-wing microrobotic insect by MEMS technology, such as SU-8, Titanium alloy and Parylene-C, are discussed. And artificial insect wings and thoraxs with different materials by MEMS Technology are fabricated and analyzed. Finally, summarize the paper and propose future research priorities.

Abstract: The MEMS gyroscope used in Spinning Projectiles is a single-chip and axis gyroscope drive by high-speed rotary of Spinning Projectiles. To analysis this theory, a corresponding mathematical module was established based on the structural principle of the gyroscope and the Kinetic parameters included in the mathematical module was analyzed and calculation. By calculation, the paper had drawn the curve between the displacement of mass and the input angular velocity. By using ANSYS software the vibration mode and harmonic response have been done, after comparing the results of imitation and calculation, it is found that the difference is little, so the theory based on the displacement of mass is correct.

Abstract: In the face of problems of labor shortage, high cost and low efficiency, if the company can implement industrial projects scientifically, enterprises could effectively increase the garment processing efficiency and enhance their marketability. This article firstly takes a clothing firm for example, analyzes and identifies problems on the production line, by using methods of program analyzing and stopwatch measuring; Secondly, this article will analyze enterprises’ methods of working and balancing to improve its balance; Finally, the results show that the application of the researching method has dramatically increased the balance of the assembly line and enterprises’ production rate.

Abstract: A seawater source heat pump (SWHP) system refers to the utilization of solar energy stored in sea water as heat source and heat sink , offer an attractive option for heating and cooling residential and commercial buildings owing to their higher energy efficiency compared with conventional systems The purpose of this study is to present an exergy analysis of a SWHP system The exergy transports between the components and the consumptions in each of the components of the SWHP system were determined for the average measured parameters obtained from the experimental results. In addition the exergy loss was presented for the SWHP system studied to give quantitative information regarding the proportion of the exergy input that is dissipated in the various system components.

Abstract: Reservoir characteristic of Underground gas storage（UGS）was not only unique, but also complex, which decided the steady and reliability of operation for UGS in the long run, brought the initial building difficulties, and affected the long effective period of economy and important parameters. So learning building and operation mechanism of UGS could help us in the process of actual production. According to the characteristic of UGS, Indoor physical modeling system was developed. The building process and several injection-production cycles of UGS were simulated. Basing on the operation rule of injection-production cycles of UGS and the flow mechanism of gas and water in reservoir, dynamic analysis theory of UGS was built. It was concluded that, porosity and permeability of reservoir, flooded condition, and heterogeneity degree of reservoir determined the building and operation effect of UGS together. Above all, flooded condition and heterogeneity were the main reasons of the long building period, the poor effect of operation and the unrealized program targets. So physical homogeneous reservoir should be used as the main target layer of UGS, and the flooded condition in gas reservoir need to be paid close attention in the long run of UGS .

Abstract: This paper focuses on evaluation of the heat exchange process based on cumulative exergy analysis method. The case study chosen is the countercurrent heat exchange process that is widely used in the industrial processes. The optimal design is achieved by minimizing the annual total cumulative exergy consumption of the cold stream. The natural resource-oriented mathematical models are established in details. Obviously, the results from cumulative exergy optimization are imposed by the present state of the technology compared with the ones from thermoeconomics.

Abstract: Inertia moment of engine is a quite important parameter for power measuring without load, instantaneous speed calculating and in cylinder pressure reconstruction. In order to get this important parameter, a new method named instantaneous speed fluctuation comparison is brought out. The detail theory and approach is introduced. After experiment on the 6135 diesel, the validity of the method is proved, and the error of the method is analyzed.

Abstract: Based on cellular automata (CA), the new technology diffusions of domestic cars and completely knocked down (CKD) cars were modeled and simulated. It is found that: (1) CA method successfully examined the new technology diffusion of domestic and CKD cars, (2) the predicted results of domestic cars show four stages of the life cycle of new technology, but those of CKD cars display only the decline stage of the life cycle, (3) the present technology of domestic cars in China is in the period of growth stage and that of CKD cars is at the decline stage, (4) with the advanced technology and new service are created and introduced into the industry of domestic cars, CKD cars will lose their market and be gradually out of the market.

Abstract: Aimed at the problems existed in the production logistics system for the automobile parts’ shop which has the characteristics of multi-product and small quantities, in this paper a production logistics simulation model is first established based on the witness to analyze the bottleneck of the current production line and to reengineer a new production process. Then a visual simulation model is established based on the e-factory to optimize the layout planning and the dynamic material handling system of the production logistics system which has been improved above. The results of this investigation present guidance and reference for other small and medium enterprises.