In the paper, a touch mode capacitive pressure sensor with double-notches structure is presented. The sensor employs a special SiC-AlN-SiC sandwich structure to achieve high-accuracy pressure measurement in hash environment such as high-temperature. The analysis to the relation of capacitance and external pressure of the sensor shows that the sensor has high sensitivity and long linear range simultaneously. In addition, the technical process of the sensor has been designed in detail in the paper. The research shows that the sensor packaged in a high-temperature ceramic AlN can withstand higher temperature. Consequently, the sensor can be applied in high-temperature and harsh environment.
The nonlinear output properties of scattered triangulation laser displacement measurement sensors with charged-coupled devices (CCDs) ware analyzed and optimized. In order to improve the high measurement precision and performance of the displacement and inclination for an object surface, dynamic skewness was regarded as coefficient for weighted linear optimization fitting algorithm to calculate the displacement instead of the averaging method; kurtosis was used to select the minimum and maximum of asymmetric distribution for inclination calculation. And, a novel calibration framework, which configured with a stepped motor to correct the discrepancy and update the coordination origin for CCD array, was introduced.
In this paper we present a global approach for the automatic inspection of spot-type defects in TFT-LCD module process. The proposed method is based on a global image reconstruction scheme using the Fourier transform. Since TFT-LCD surface has the statistical and periodic texture, the isotropic spread of frequency components in the power spectrum space forms the shape approximate to a circle. By computing the convolution between the Fourier transform result and a ideal low pass filter (ILPF) , we can remove the TFT-LCD periodic and repetitive patterns using the inverse Fourier transform. In the restored image, the global structurally textured background is eliminated and the spot-type defects are preserved. This converts the difficult defect detection in TFT-LCD images into a simple segmentation problem. The spot-type defects are classified into general point defects and spot Mura defects .The experimental results from point defects and spot Mura defects have shown the efficacy of the proposed method.
Interoperability is a key issue in implementing an e-Government system. Grid Computing based service for interoperability (e-Gov Grid Computing) could be a solution for resource sharing and interoperability of e-Gov systems. The main objective of this paper is to develop an e-Gov Grid Computing Model through e-Gov policy in Bangladesh in order to ensure good governance. The necessary reformation which are required for implementation of ICT Grid Computing system for e-Government are administrative reform for governmental and non-governmental organizations for ensuring transparency and accountability, economic and financial systems reform, politics and political parties reform, planning and policy reform, judicial reform, reform in organizations engaged in ensuring law and order.
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