MEMS Resonator‐Based Insulated Voltage Sensor Withstanding Higher Voltage

The Si resonator is applied for measuring the voltage in a highly isolated manner. The working principle is based on the resonant frequency shift caused by the electrical field from the electrode connected to the high‐voltage source (supposing the battery). Here, the resonator is electrically floated, and its potential is decided by the relative position against the electrodes which are connected to the high voltage and the driving voltage. The induced voltage on the resonator is analyzed against the driving frequency. The resonance is found by the paired peaks in the amplitude curve. The setup for the electrical measurement can make the sensor system compact. A new sensor design for avoiding the electrical field concentration realizes the measurement over 400 V without the breakdown. This will match with the high‐voltage dc power supply system.     

As_2S_8薄膜光致折射率效应及其在条波导制备中的应用研究

分别采用紫外光和He—Cd激光辐照,实验研究了As2S8非晶态薄膜的光致折射率变化以及膜厚变 化的现象,归纳了实验规律,初步分析了机理。利用光诱起折射率变化效应试制了As2S8玻璃条波导,实现了良好 的导波特性。     

Estimation of the order of autoregressive process

Though there are several methods for estimating the order of the autoregressive process, it is hoped that it can be estimated with high sensitivity. In this paper, an approach based on an information measure which characterizes the autoregressive process has boon made to the estimation of the order of the process. A mixing operator, which is found by adding an independent random variable to the sub-sequence of the original data sequence, is introduced. By applying the operator to the conditional entropies, we developed a statistic which estimates the order of the autoregressive process. Results of computer simulation are presented to verify and compare this algorithm with other methods.     

采用光学方法研究陶瓷绝缘材料的沿面闪络特性

对比研究了真空中交流电压下采用和未采用真空溅射金属电极的氧化铝陶瓷材料,在沿面闪络发生前不同的表面发光特性。基于固体的能带理论,提出了２类试品在金属电极－介质的界面处不同的能量状态分布模型;并在此基础上同时考虑电荷注入复合和场致电子发射对发光的影响,解释了２类试品发光的差异性,指出了采用和未采用真空溅射金属电极的氧化铝陶瓷存在不同的沿面闪络起始机理及发展过程。     

东京成德学园十条台校园与明治大学生田第二校舍A馆

东京成德学园十条台校园1.城市景观的改善与校园的再构成东京成德学园是一个在东京,千叶、埼玉拥有大学、短期大学、高中、初中及幼儿园的综合学园,其中十条台校园是于1965年开设的以短期课程为中心的大专教育基地。该校园位于安静的住宅区     

鞋材料革的卫生研究

我们在鞋内卫生方面完成了系统研究，并注明了条件。本文中，我们报导了湿气的累积和微生物的生长取决于鞋的不同材料。我们得出结论，鞋的用料和结构对累积湿气和它对微生物环境的影响方面是最重要的卫生因素。     

Estimation of surface orientation from directional derivatives of shading image

A new estimation approach is proposed to reconstruct the surface shape from shading images. The reflectance property of the object surface material is the uniform lambertian property; the light source produces a uniform parallel beam, and image projection is orthographic. The illuminating direction is varied slightly to obtain directional derivatives of image density. The new approach shows that the local surface orientation is reconstructed from the directional derivatives of the image density. Differently from other approaches, all components of the illuminating direction vector or the proportional constant are not necessary for this reconstruction. Computer simulations show the evaluation of errors in approximating and quantizing process. The effectiveness of this approach is demonstrated in the shape reconstruction simulations for the curved objects     

DESIGN OPTIMIZATION FOR ROBUSTNESS USING QUADRATURE FACTORIAL MODELS

Abstract

This paper describes a robust optimization methodology for designs involving either complex simulations or actual experiments. The methodology adopts a new objective function that consists of the Expected Performance (EP) and the weighted Deviation Index (DI). The proposed Quadrature Factorial Model estimates the expected performance and the standard deviation of a design. This scheme greatly reduces the number of experiments and provides superior results for systems with significant interaction effects and nonlinear variations. The proposed methodology is applied to the design of helical gears with minimum transmission error. The robust optimum shows a significant reduction of the expected transmission error compared with previous studies, while maintaining the insensitivity to manufacturing errors and load variation.     

Rapid Enzymatic Assay for Ascorbic Acid in Various Foods Using Peroxidase

Based on direct spectrophotometry and the oxidation of ascorbic acid by guaiacol peroxidase, this method was simple, rapid and highly specific for ascorbic acid. No interference was seen for any food sample tested, including vegetables, fruits, potatoes, beans, chicken liver, processed food, tea and seaweed. This method was applicable to colored and/or sugar-rich samples, and more precise than officially adopted chemical methods.