查询词典 electronic engineering

In addition, some modifications on several computational methods are also presented. Using LMTO method the electronic structure of several systems are studied, and some results are obtained. They are: The ideal Nb (100) surface has three surface states, the multi-layer relaxed surface has two surface states. The surface energy of the ideal surface is higher than that of the relaxed surface, that means that the multi-layer relaxed surface is more stable than the former one, which supports the LEED results. The mono-layer relaxed Ag (111) surface is the most stable one among several" stable surface models"presented by several researchers. The surface energy of Ag (111) surface is higher than that of surface Ag (001), which supports some experimental results such as different reaction rate at different surface orientations for the same material. The surafce states of Si (111) surface not only locate near the Fermi level, but also in the valence band, which agrees well with Cohen's conclusion. Si (111)-H is an effective model for analysing the surface states and H adsorbed on the back surface is a good method for improving the convincingness of the results obtained on thinner slab models. The surface stability depends on three different kinds of MoSi〓(001) surfaces, the surface with mono-layer Si is the most stable one, and the surface with Mo at the first layer is the most unstable one among them. These are consistant with the Kemoda's experimental results. The valence bands of clean or K adsorbed CdTe (111) surface agrees well with the synchrotron radiation studies. The surface of CdTe (111) consists of four kinds of surface models which show different surface electronic structures and different surface structure stabilities. The conclusion agrees well with Wu's experimental work. The different absorbed alkali metals on the CdTe (111) surface give different adsorption characteristics which have relations not only with the valence electrons, but also with the core ones of the alkali metals. The electonic structures of Si-C alloys are different from that of Si-Ge alloys, and the energy band gaps of Si-C alloys do not increase linearly with Carbon concentration, our conclusion supports Alexander's results, but conflicts with Soref's one.

现分述如下： LMTO方法及其应用方面：1）通过对Nb（100）表面电子态分析发现清洁理想表面有三个表面态，多层弛豫表面有两个表面态；表面能大小说明多层弛豫表面更稳定，支持了LEED结果。2）通过对采用不同方法获得的几种不同Ag（111）表面稳定结构的表面能计算分析，给出了单层弛豫表面为Ag（111）表面的最稳定结构；从Ag（111）单层弛豫表面和Ag（001）表面的表面能比较，发现了Ag（001）表面表面能要比Ag（111）小的，表明了同种物质不同表面取向将表现出不同物理、化学性质，这是与实验中得出的结论是吻合的，3）通过对Si（111）表面态分析，不仅发现了Si（111）表面不仅具有居于费米能级附近的悬挂键所对应的表面态，而且还有很多表面态位于价带能量范围内，与Cohen等结果一致，H饱和slab模型背表面相当于增加了slab层的厚度，是一有效的变相增加slab层厚的方法，弛豫表面较清洁理想表面价带谱们低能端的少许移动，预示着总能降低，说明弛豫表面较清洁理想表面稳定。4）MoSi〓具有三种表面，从费米能级上态密度值大小得到单层Si表面最稳定，Mo原子为表层原子的表面最不稳定，双层Si原子表面居中的结论，这与Kemoda等人实验结果是一致的。5）通过对CdTe（111）表面表面电子态、表面结构稳定性及表面H、碱金属吸附的电子结构系列研究，不仅得出了CdTe（111）清洁及碱金属K吸附价带谱与同步辐射光电子谱相吻合的结果，而且发现了CdTe（111）表面具有四类不同原子近邻特征，表现出四类不同的表面结构及电子结构特征：不同表面态分布、不同的表面结构稳定性（表层原子与次层原子成三键有一悬挂键的表面要比表层原子与次层原子成一键有三悬挂键稳定（与Wu等人实验结果一致））、不同的H吸附特性。

Coquimbo Dragon Electronics Co., Ltd., located in Bao'an District, Shenzhen City, relying on the verge of Hong Kong's advantages, product design novel fashion, when compared with similar products to lead the world trend, professional commitment to electronic gifts and electronic toys design development and production.

金博龙电子有限公司，位于深圳市宝安区，依托濒临香港的优势，产品设计新颖时尚，在同类产品中引领世界潮流，专业致力于电子礼品及电子玩具的设计开发和生产。

Recently for the applications such as modern communications, synthetic aperture radars , electronic detect, electronic counterplot, and radar polarmeters, etc., the dual-polarization and polarization-agile functions of antennas are demanded and their optimization designs of systems are required. Their theory and further applications are being in the process of developing.

近年来在现代通信系统、合成口径雷达、电子探测、电子对抗、极化测量等应用中，要求天线具有双极化、变极化功能，而且整个系统需要优化设计，其理论与应用均处于发展之中。

Current, the academic research that the country manages to electronic file already experienced more than 20 years, file of plasticity of of all kinds compasses from draft, pilot, arrive again the time that applied also be passed nearly 10 years, but its application still is in experiment phase, electronic file management still is run in non-standard ground.

目前，国家对电子文件管理的理论探究已经历了二十多年，各类规范性文件从起草、试点，再到施行也经过了近十年的时间，但其应用仍处于试验阶段，电子文件管理仍在不规范地运作。

With the development of electronic technique of banks, traditional bill validity check method has been an obstacle because of its low efficiency and bad security. As a result, the electronic payment cryptograph system emerges, and it has been used widely in banks.

随着银行业电子化的发展，传统的银行票据验证方式由于效率低、安全性差，成为制约银行业务发展的一大障碍；于是，电子支付密码系统应运而生，并在银行业被广泛应用。

Electronic measurement techniques is a basic course of electronic and information, cybernation and measuring instrument specialty.

电子测量技术》是电子信息、自动控制、测量仪器等专业的通用技课程改革，计划总结，公文术基础课程。

The security of an electronic defrayal communications network system is the fundamental problem of implementing electronic business .

电子支付网络系统中的保密通信问题是实现安全电子交易的核心问题。

Chapter 4 introduces the defrayment system of E-commerce and analyzes several digital defrayment fashions, such as credit card, electronic cash, electronic check and micropayment.

第4章介绍电子商务支付系统，并分析比较了几种典型的电子支付方式，包含信用卡支付，电子现金支付，电子支票支付和微支付，最后提出了电子支票延迟支付方案。

Since electronic diesel system performs high accuracy as well as rapid respond and is suitable to various algorithms, and has obvious effect on improving of derivability and emissions for diesel engine, electronic control technique has been the main trendy in diesel engine field.

由于柴油机电控系统具有良好的控制精度、快速的响应和灵活的控制算法，在改善发动机动力性、经济性和排放性等方面能取得明显的效果，柴油机电控技术已经成为当今柴油机领域的发展热点。

The development and the application of electronic design automation technology not only cause revolutionary change to the design and manufacture of electronic system, but also bring forward new requirements on the Didactics reform of relative college courses.

电子设计自动化技术的发展与应用不仅使电子系统设计与制造发生了革命性的变化，也对高等院校相关课程的教学改革提出了新的要求。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。