光纤光栅电流传感器

本文提出并实验验证了一种利用新型材料制造的光纤电流传感器。通过结构的合理设计,提高了由光纤光栅和磁致伸缩材料构成的光纤电流传感器的检测灵敏度。所使用的致材料和传感器工作的动态范围的合理选择,使得传感器的输出有很好的线性,并且避开了磁致材料的磁滞效应对传感器特性的影响。     

Analysis of image sticking on a real MVA Cell

Abstract— Image‐sticking phenomenon is one of the most important issues affecting LCDs, especially LCD TV. It is known that image sticking is caused by residual DC voltage. An analysis of the cause that induces image sticking on a real LCD cell is very difficult to perform and is rarely reported. In this paper, the impurities that cause boundary image sticking on a real MVA cell was analyzed by examining a cross section of a cell, the bulk LC layer, the vicinity of the LC layer, the LC layer/PI alignment film interface using microanalysis methods such as infrared micro‐spectroscopy (μ‐IR) and micro‐sampling mass spectrometry (μ‐MS). It is clarified that there is quite a bit of aromatic acid at the boundary of the image‐sticking area than in the normal area at the LC/PI alignment film interface on the color‐filter side, not the TFT side, and it is assumed that aromatic carboxylic acid, a negative charged material, is condensed at the LC/PI alignment film interface on the color filter side by an electrically driven DC component inducing an electric‐condenser residual DC voltage.     

探寻十届美展壁画作品的材质美

材质是建构壁画形式美的重要因素之一。第十届全国美展壁画作品充分运用材质美感来加强壁画艺术的感染力,这些壁画无论使用那种类型的材料,这些材料都能各显其长,与建筑环境达到了统一的、和谐的关系。可见,材料不仅仅是壁画艺术家表现的工具,也是传递艺术家意志与观念的媒介。     

材料在城市公共设施设计中的应用

公共设施作为城市空间的要素之一,已是城市形象构筑中不可缺少的一部分。在提倡可持续发展的现代社会,产品在满足审美性、使用性的同时,材料的应用至关重要。本文分析现代社会,城市公共设施设计中材料的使用情况,并从绿色设计角度展望未来的材料前景。     

Physiological and psychophysical responses in handling maximum acceptable weights under different footwear--floor friction conditions

A study on combined manual materials-handling tasks performed on floors under three friction levels was conducted. Eight male subjects participated in the study. The maximum acceptable weight of handling, including lifting, carrying for 3m, lowering, and walking 3m back at twice per minute was determined. The subject then performed the same tasks for 10 min. Heart rate, Vo2, energy efficiency, perceived sense of slip, and rating of perceived exertion for whole body strain were measured. The results showed that the effects of friction level on the maximum acceptable weights of handling, perceived sense of slip, Vo2, and energy efficiency were statistically significant (p相似文献   

弹性波硬度传感器的设计应用

介绍采用磁弹性波检测材料硬度的一种新技术 ,采用该技术可实现在线、无损、便携测量 ,测量时间短 ,准确度高等特点     

纳米材料SnO_2的室温固相合成及其气敏特性

以无机物SnCl4 ·5H2 O、Na2 CO3 (摩尔比 1:2 )为原料 ,室温下研磨 ,使其发生固相化学反应 ,制得SnO2 ,采用X -射线衍射技术 (XRD)和透射电子显微镜 (TEM)等测试手段对材料的物相和微观结构进行了分析 ,结果表明 ,所得产物为理论产物 ,且平均粒径约为 2 5nm ;采用HWC - 30A汉威气敏元件测试系统对材料的气敏性能进行了测试 ,结果表明 ,该材料制成的烧结型元件对可燃性气体有很高的灵敏度 ,通过控制工作温度可提高元件的选择性     

一个农户生态经济系统的分析

对沈阳市桃仙镇荒山子村一个农户生态经济系统进行分析,结果表明：该农户正处于从传统农业向现代农业的过渡阶段,经济效益较好,整体技术水平和生态效益低,后两了该农户的进一步发展,以目前的生产水平,应采取户与户联合,取得规模效益,以当前农业产业化的发展。     

超声振动切削加工速度系数的研究

用速度系数K对振动切削的动态切削过程进行了分析,由试验研究得出:加工硬脆材料时,关键是振动切削中的冲击作用,当K=0.308时,冲击作用最强,切削效果最好,试验结果与理论分析基本一致。     

The use of an electrothermal plasma gun to simulate the extremely high heat flux conditions of a tokamak disruption

Disruption damage conditions for future large tokamaks like ITER are nearly impossible to simulate on current tokamaks. The electrothermal plasma source SIRENS has been designed, constructed, and operated to produce high density (> 10²⁵/m³), low temperature (1–3 eV) plasma formed by the ablation of the insulator with currents of up to 100 kA (100 s pulse length) and energies up to 15 kJ. The source heat fluence (variable from 0.2 to 7 MJ/m²) is adequate for simulation of the thermal quench phase of plasma disruption in future fusion tokamaks. Different materials have been exposed to the high heat flux in SIRENS, where comparative erosion behavior was obtained. Vapor shield phenomena has been characterized for different materials, and the energy transmission factor through the shielding layer is obtained. The device is also equipped with a magnet capable of producing a parallel magnetic field (up to 16 T) over a 8 msec pulse length. The magnetic field is produced to decrease the turbulent energy transport through the vapor shield, which provides further reduction of surface erosion (magnetic vapor shield effect).