Applied Mechanics and Materials Vols. 121-126

Abstract: The local linear embedding algorithm(LLE) is applied into the anomaly detection algorithm on the basis of the feature analysis of the hyperspectral data. Then, to deal with the problem of declining capacity of identifying the neighborhood caused by the Euclidean distance, an improved LLE algorithm is developed. The improved LLE algorithm selects neighborhood pixels according to the spectral gradient, thus making the anomaly detection more robust to the changes of light and terrain. Experimental results prove the feasibility of using LLE algorithm to solve the anomaly detection problem, and the effectiveness of the algorithm in improving the detection performance.

Abstract: In this work, a field survey is performed in 309 residential building clusters in South China to obtain the basic characters of urban planning and design of residential buildings in this area. Based on it, the basic model of residential building clusters in this area is established, and CFD method is used to simulate the outdoor wind environment around residential buildings with different planning and design factors. The influence of building coverage ratio on the pedestrian spatial mean velocity ratio under 16 wind directions is found to be more remarkable than those of the floor area ratio and building layout. 10% increase of the building coverage ratio results in 0.1 linear decrease of the mean velocity ratio under 16 wind directions at the pedestrian level.

Abstract: For making the conceptual design process optimization, achieve its various function demand, and confirm the optimal proposal. Contra pose the shortage of conceptual design process, combine the basic national conditions in china, we put forward the basic definition of the conceptual design. Firstly we discussed the basic content and basic step of the conceptual design, secondly, we analyzed demand design, function design, principle design and conceptual design according to designing weapon cupboard for the armed forces department in swallow village located in Hefeng country. We get the superiority of the conceptual design, Benefit designers to use their talents, benefit the innovative design, Stimulate the product design standardization and formulation, benefit product design sustainable and rapid development.

Abstract: Not all of the measurement data of IC (Integrated Circuit) reference material are valid, so some work would be do to eliminate the null and wrong ones. This paper presents an algorithmic model of the characterization for IC reference material, which can help choose the valid data for the property value validated of IC reference material. The experimentation results of the characterization procedure are detailed in the paper, which proves to be helpful steps to IC reference material characterization and preparation.

Abstract: The necessity on construction for practical teaching base on campus for petroleum engineering is described from such three aspects as requirement of practical talents training, requirement of vocational skills training as well as requirement of subject construction and campus culture construction in this article, the construction mode of practical teaching base on campus for petroleum engineering is discussed and the advantage of establishing the practical teaching base on campus cooperated jointly by campus and enterprise is analyze. Finally, the efficiency produced by the practical teaching on campus is summarized with combination of the operation condition of practical teaching base on campus for petroleum engineering.

Abstract: The energy usage of building has occupied the large portion of total energy consumption. It is important to develop the building energy consumption minimization method. The new study adopted the thermal conservation equation for this multivariable control issue and the linear matrix inequality based on linear quadratic regulator for mixed H2&H∞ control. After substituting the obtained control gains into the original thermal systems, the asymptotically stabilities of whole systems are guaranteed. The comparison between the traditional and current control scheme are made.

Abstract: By the CI (Covariance Intersection) fusion algorithm, based on the ARMA innovation model, the two-sensor CI fusion Kalman estimators are presented for the systems with unknown cross-covariance. It is proved that their estimation accuracies are higher than those of the local Kalman estimators, and are lower than those of the optimal fused Kalman estimators. A Monte-Carlo simulation result shows that the actual accuracy of the presented CI fusion Kalman estimator are close to those of the optimal fused Kalman estimators with known cross-covariance.

Abstract: A low power 32-bit microcontroller using different kinds of low-power techniques to adapt to the dynamically changing performance demands and power consumption constraints of battery powered applications is designed and tested. Four power domains and six power modes are designed to fulfill low-power targets and meet different functional requirements. Varieties of low power methods such as dynamic voltage and frequency scaling (DVFS), multiple supply voltages (MSV), power gating (PG) and so on are applied. A novel zero steady-state current POR circuit which makes excellent performance in the chip’s OFF mode is also integrated. The SoC occupies 20 mm2 in a 0.18 um, 1.8 V nominal-supply, CMOS process. Test results show that the microcontroller works normally at the frequency of 70MHz and performs well in different power modes. Yet it only consumes 1.67μA leakage current in the OFF mode.

Abstract: With the changes of learning psychology and information technology, CSCL tools should also keep up with the times and meet the growing needs of learners. The appearance of RIA can make up the deficiencies of Web-based CSCL tools at present. With the use of RIA, the next generation tools could be realized with high interactivity and richer user interfaces. Silverlight is one of mainstream technologies of RIA, and it has the advantages of better user interfaces, high development efficiency, newer way of communication, and so on, which other RIA technologies could not reach. In order to facilitate collaborative knowledge construction of learners, the paper design and develop a Web-based CSCL tool which has the function of real-time interactivity with words or graphics.

Abstract: Flight control system (FCS) is the command center for the unmanned aerial vehicle (UAV). A low-cost, high-precision micro-UAV attitude calibration table is designed by utilizing the structure of the vertical gyroscope of the flight attitude angle sensor. The detection device for the UAV FCS developed by loop-in-simulation achieves unmanned attitude calibration and overall performance detection of the FCS.