Advanced Materials Research Vols. 179-180

Abstract: Uncooled infrared bolometer arrays have become mainstream low-cost thermal detector used in applications such as firefighting, security and surveillance, and environment temperature control for food operation. In order to resolve the pixel structure’s stress problem of microbolometer, this paper adopts finite element analysis method to model and analyze the mechanical properties of pixel structure. Several results of the stress and displacement are presented and the influence of structure optimization on the stress is also analyzed quantitatively. The research provides a good foundation and mechanics reference for mechanical design of uncooled microbolometer.

Abstract: Micro-actuator technology is important base of design and fabrication MEMS. According to a kind of bimorph thermal actuator, this paper obtains the thermal deflection and temperature distribution of MEMS thermal actuator by using finite element analysis. The relationship between the thermal deflection and some parameter such as length of flexure are analyzed in detail. Through simulation comparison, the influences of the length of flexure on thermal deflection and fatigue life are verified, which provides a good guide for the design of MEMS thermal actuator further.

Abstract: It refers to the main form and the mechanical characteristics of transfer structure. It analyzed the practical architectural mechanics basing on finite element theory. Using the finite element analysis software, it adopts three solutions and establishes models, then analyzes under seismic action. The results show that, the three transfer structure forms can be applied to the project without consideration of function of structure. The results of this study provides theoretical basis for high-rise building design with transfer story.

Abstract: As an important part of vehicle following control system, vehicle longitudinal dynamic model had significant effect on the research and development phases. The clutch engaging and exhaust brake process of AMT vehicle represented strong nonlinearity, and the theoretical models were complex and depended on many parameters. Focusing on the requirement of following control system, the models of the two processes above were simplified for the engineering application by combining theoretical analysis and real vehicle test data to describe the dynamic processes. Finally, the vehicle model based on MATLAB was build and the comparative experiments were conducted. The comparative results show that the simulation results agree well with the real vehicle tests.

Abstract: Scatter matrix based class separability criterion is commonly used in supervised feature extraction. But calculations of scatter matrixes depend on labeled data, so this criterion can not be used in unsupervised pattern. This paper presents a method to extend scatter matrix based class separability criterion to unsupervised pattern by fuzzy theory. The basic idea is to optimize the defined fuzzy Fisher criterion function to figure out fuzzy scatter matrixes in unsupervised pattern. Based on the obtained fuzzy between-class scatter matrix and fuzzy within-class scatter matrix, a novel class separability criterion based unsupervised feature extraction is proposed. Experimental results on its applications in UCI datasets show its effectiveness.

Abstract: CY7C68013 data acquisition card generally connect GPIF with other peripherals through the external FIFO, not only increasing the device but getting poor real-time relatively. This paper, USB2.0-Based data acquisition system, solves this problem successfully. The system based on high-speed USB2.0 transmission control chip CY7C68013, uses GPIF connected A / D device directly. Calculate time intervals correctly, not only avoiding data loss, but also saving the FIFO memory and related connections, which greatly reduce costs. This paper describes how the GPIF connects to A / D chip as well as designing of firmware and application programs.

Abstract: Taximeter measurement error is the vital relationship between the interests of drivers and passengers. In order to deal both fair and just, the need for regular taxi meter test vehicle is necessary, this time from the meter of the taximeter and the vehicle test meter error of the meter on the taximeter areas were more comprehensive pricing error analysis, to improve the efficiency and accuracy test.

Abstract: Classical spectral estimation, whether the direct method or indirect method, are available to fast Fourier transform method, their concepts are clear and easy to understand, its resolution is proportional to . This paper describes the commonly used in modern power spectrum estimation based on AR model Burg algorithm, MATLAB simulation shows this method to estimate the power spectrum curve, results showed that the Burg algorithm in spectral resolution and model in the order of sub-option square than the self-correlation algorithm has obvious advantages.

Abstract: Daqing spirit is the important component of Chinese nation spirit. Daqing spirit and enterprise culture are all in the Socialist era, Daqing spirit is the important content of socialist spiritual civilization, while the building of enterprise culture calls for the socialist spiritual civilization; Daqing spirit also has many identities for the competitive consciousness of enterprise culture under the condition of market economy. Therefore, the current socialism enterprise culture construction needs Daqing spirit.

Abstract: Corrosion rate in measuring metal corrosion by electrochemical sensors measuring speed, through the internal chip processed data to the screen, the traditional method of communication with the host computer is using RS232 or RS485 interface does not have hot swappable and Plug features used, storage capacity is also limited. To solve this problem, the device USB-interface to communicate with the host computer and realized the hot swap and plug and play function, memory is extended and improve equipment storage capacity, the design of PC applications that facilitates the user. Experimental results show that the system has good stability, easy operation, greatly increased the use of the instrument, a bright future.