Fabrication of a high aspect ratio nanoporous array on silicon

In this study, a simple method for the fabrication of high aspect ratio silicon nanoporous arrays is developed. A N-type silicon wafer is used as the substrate material. A micro-scale pattern of the desired porous array is transferred to the front surface of the silicon wafer by photolithography after which the wafer is placed in a home-made fixture to efficiently expel the etching generated air and promptly hold the back-side illumination light. A halogen lamp is used as the light source for backside illumination to enhance the electron–hole pair generation. An anodization process is then carried out using a new etchant consisting of hydrofluoric acid and mixed EtOH and EMSO surfactant to effectively polish the pore surfaces and sharpen the tips of the etched pores. A nanochannel array with a nano-tip of 61.4?nm is obtained.     

Approximate controllability of stochastic impulsive functional systems with infinite delay

This paper studies the approximate controllability of stochastic impulsive functional system with infinite delay in abstract space. By using the contraction mapping principle, some sufficient conditions are given with no compactness condition imposed on the semigroup generated by the linear part of the system. Then with the help of the Nussbaum fixed point theorem, the restriction of the combination of system parameters is dropped. Finally, an example is shown to illustrate our results.     

工程总承包公司的合同管理研究

山东鲁能工程有限责任公司开展电力工程总承包始于上世纪九十年代中期,近五年来总承包事业发展迅速,公司陆续签订了嘉峪关宏晟2×300M W电厂、重庆永川2×125M W电厂、费县2×600M W电厂脱硫、章丘2×300M W电厂脱硫、潍坊2×25M W电厂、单县1×25M W生物发电厂等一批总承包合同,均采用了国际上通行的FID IC合同条款。为规范公司的经营管理,防范合同风险,维护公司合法权益,我们研究摸索了一套适应矩阵管理的总承包公司合同管理体系,在此做简要介绍,与同行交流。一、合同管理中常见问题合同是市场经济下确定不同主体之间经济关系的重…     

Cooling rate effects on the microstructure and phase formation in Zr51Cu20.7Ni12Al16.3 bulk metallic glass

A detailed transmission electron microscope (TEM) study has been conducted to investigate the microstructures of the Zr₅₁Cu_20.7Ni₁₂Al_16.3 metallic glass formed at different cooling rates. It has been found that the most competitive crystalline phase to the amorphous structure is an oxygen-stabilized FCC NiZr₂-type phase, which in turn acts as the leading phase to trigger the formation of other crystalline phases in the slow-cooled alloy.     

澳大利亚插头产品标准及测试的分析

文章介绍了澳大利亚的插头产品的标准、测试要点，主要的标准要求，以及易出现不合格的情况，以期给出使用澳洲插头的有益指引．     

Preparation of a sensor substrate using functionalized mesoporous silica on a gold film for surface plasmon resonance (SPR) spectroscopy

The use of surface plasmon resonance (SPR) spectroscopy has been applied to a wide variety of fields such as biosensors and surface analysis instruments. In general, a SPR substrate is prepared using self-assembled monolayer (SAM) method of organic molecules as receptor for the target on a layer of gold or silver. However, mesoporous inorganic materials such as SBA-15 have benefits as sensor substrate for SPR. Mesoporous silica has a large surface area which receptor molecule can be attached and has a rigid body which has an excellent stability in the extreme condition compared to organic sensing layer. We prepared an organic modified mesoporous silica and successfully immobilized it on a gold surface, in an attempt to use as a substrate for SPR spectroscopy. For the comparison of sensitivity of prepared substrate, Pt²⁺ detection was selected as a model system. Substrate prepared in this study exhibited the capability of selective sensing for Pt²⁺ ions.     

货运通道控制系统设计与实现

本文介绍了一种应用于出口加工区的货运通道控制系统的设计思路与实现方法。该系统作为出口加工区的卡口控制管理系统的前台部分,主要实现对过往车辆的集装箱号与电子车牌的识别、数据查验比对和外围设备控制等功能。