计算机系统

The TEMPEST technique's principle and its application to the computer system are discussed.

论述了TEMPEST技术的原理、及其在计算机系统中防护技术。

The matrix tensor product computation is important in matrix computation. Compared with its multiplication, the computing amount of tensor product is huger. Based on analyzing its mathematical properties.

0引言在工程设计、数值代数等领域中，许多的计算问题最终会归结到矩阵的计算问题，需要利用并行计算机系统进行大规模并行计算。

Returns the serial number of the current date or time.

返回计算机系统内部时钟的当前日期与时间。

This project was established based on the first cooperative development of optical in situ real time detecting technique probing the atomic scale layer-by-layer epitaxy growth of oxide film. Over the last three years, we have given full play to the advantages and characteristics of both sides and have finished the assumptions and plans of this subject satisfactorily. 1. In Institute of Physics, we set up advanced oblique-incidence reflectivity difference equipment and wrote one data acquisition procedure that made the simultaneous detection of optical signal and RHEED signal into reality. 2. The first observation of sustained oscillations over hundreds of monolayers in both real and imaginary signals during the epitaxy growth of SrNb0.1Ti0.9O3 on SrTiO3 substrate in LMBE testifies that oblique-incidence is an excellent method to detect and monitor film epitaxy growth real time. 3. For the first time, we verify that oblique-incidence reflectivity difference method can be used to monitor the layer-by-layer growth mode during continuous growth through the correspondence between optical signals to atomic or molecular step edge density on the growth surface. 4. Phenomenological analysis shows that optical signals comprise three parts, the first is proportional to the average thickness of the film and depends on the bulk phase dielectric response; the second is proportional to the coverage of terraces and depends on the dielectric response of atoms or unit cells in the terrace; the third is proportional to the coverage of step edges and depends on the effective dielectric response of atoms or unit cells at step edges. This makes oblique-incident reflectivity difference technique a quantitative macroscopic method to monitor film growth.

中文摘要：本课题是在合作首次发展了氧化物薄膜原子尺度层状外延生长光学原位实时探测方法的基础上立项的，三年来，我们充分发挥双方的优势和特点，圆满完成了课题的设想和计划。1、在物理所建立了一套先进的光反射差法装置，编写了计算机系统的数据采集程序，实现了两路光学信号和RHEED数据的同步采集和显示。2、用激光分子束外延在SrTiO3基底上生长SrNb0.1Ti0.9O3薄膜，首次观测到连续外延几百个原胞层，周期振荡的光反射差实部和虚部信号，证明了光反射差法是一种能原位实时探测与监控薄膜层状外延生长的好方法。3、首次验证了通过对生长表面原子或分子台阶密度的响应，光反射差法可用于原位实时监测在连续生长条件下薄膜的层式生长模式。4、通过唯象理论的研究，证明光反射差信号由三项组成，第一项只与薄膜的平均厚度和宏观光学电介质常数有关；第二项与分子台阶面覆盖度和台阶面上分子层的光学电介质常数有关；第三项与台阶边缘的覆盖度成正比，并和在台阶边缘的分子的有效光学介电常数有关。

For example, ancient timesharing computer systems had local "mail" services so its users could communicate.

例如，古老的分时计算机系统拥有本地的"邮件"服务，因此它的用户可以进行交流。

Roy Tomlinson develops a program for sending messages between computer systems.

雷。汤姆林森开发一种程序用于在计算机系统间传输信息。

The article explicates the ultramodern development and improvement of multislice CT in the detector,X-ray tube,techndogy of slip ring,computer system and software.

本文阐述了MSCT探测器、X线球管、滑环技术、计算机系统以及MSCT软件的最新进展和改进。

People who gain unauthorized access to a computer system for fun and challenge are called Hackers.

谁的人未经授权访问的乐趣和挑战的计算机系统被称为黑客。

This paper introduce an exertion way of mensurate unsteady state, much improvement have be mading in the mensuration of the thermal conductivity for conductor of undesirability with the counter system.

摘要介绍了一种非稳态测量方法的运用，结合计算机系统，使不良导体热导率的测定得到较大的改进。

Along with the computer system application and the microcomputer network development, the unimportance which the correspondence function more and more reveals.

摘要随着计算机系统的应用和微机网络的发展，通信功能越来越显的重要。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。