TEM IMAGING TECHNIQUE

This imaging technique is used for approximate interpretation of TEM data including ungrounded loopsource and grounded line source soundings.Loop source data can be collected as central-loop soundings or asout-of-loop soundings with a short or long offset configuration.The imaging method is based on the same princi-ple as that employed by Fullager(1989),with apparent resistivities computed directly from time-derivative data,db/d,and then associated with depths according to image theory.     

BREAKAGE MECHANISM OF TUNGSTEN BASED ALLOY BLOCK FOR ELECTRO-HEAT UPSETTING

The breakage mechanism of W-Ni-Fe alloy in the process of electro-heat upsetting studied both theoretically and experimetnally, and also the behaviors of crack formation and propagation were analysed. Alloy suffers from corrosion and thermal-mechanical fatigue mutual function. Simultaneously, the practical ways to improve the anvil life was discussed.     

企业漏洞扫描前应考虑的3个问题

企业漏洞扫描对于企业来说是十分重要的一个网络安全组成部分,做好漏洞扫描可以使企业网络安全程度得到很大程度的提升。但是企业漏洞扫描也是一项很复杂的工作,本篇文章就将介绍企业漏洞扫描应考虑的3个问题。     

移动安全策略制定必备五大要素

随着网络范围的不断扩大,IT部门不得不应对新的工作负担。根据Forrester公司的调查结果,全球已经有29％的企业员工以远程方式处理工作信息,他们常常利用三台或更多设备在不同地点处理日常事务,且在流程中往往涉及多种应用程序,这一状况已经引起了IT部门领导者的重视。     

Web浏览器扩展程序安全：缓解浏览器插件威胁

大多数Web浏览器用户都期望浏览器扩展程序、插件和浏览器帮助者对象（BHO）能提供一些便利。不幸的是,这些附加产品通过将组件添加到浏览器的默认功能来提高生产力的同时,也成为恶意攻击者的首要攻击目标。因为企业在修补和更新插件和扩展程序方面的能力普遍较差,所以浏览器就成为了终端最脆弱的攻击目标。对于终端环境来说,大多数企业的补丁周期是2～3个月,这个周期很长以至于企业不能及时地跟上利用浏览器扩展程序和插件漏洞的攻击组件。     

发掘经济困难时期隐藏的IT机遇

今天,IT正面临史上最强的挑战。IT经理们正在承受巨大的成本削减压力,而且这种压力正随着当前严峻的经济形势而不断增加。许多研究员在近期的研究报告中指出．IT机构正在谋求减少员工人数以及他们在2009年的整体开支。为应对这一挑战,其他业务领域比以往任何时候都更加依赖IT．以求借此应对日益激烈的竞争和资金减少等情况。预算紧缩也使企业对效率寄予更高的要求。     

Theory and techniques of data mining in CGF behavior modeling

For the large quantity of data,rules and models generated in the course of computer generated forces (CGFs) behavior modeling,the common analytical methods are statistical methods based on the tactical rules,tactical doctrine and empirical knowledge.However,from the viewpoint of data mining,we can find many of these analytical methods are also each-and-every different data mining methods.In this paper,we survey the data mining theory and techniques that have appeared in the course of CGF behavior modeling f...     

我国陆地观测卫星现状及发展战略思考

本文回顾总结了我国陆地观测卫星载荷体系、地面系统建设及数据应用等方面的发展现状和成就,分析了当前所面临的挑战和任务,以此为基础,对我国陆地观测卫星的未来发展进行了战略思考和展望,提出了加强国家顶层规划、加强地面系统统筹建设、实现系列化业务化运营、加强国际合作、推进产业化发展等建议.     

网络信息安全问题的法律探析

网络技术的发展以及应用深刻地影响着人类社会,在给人类带来巨大便利的同时也带来了诸如网络信息安全问题等隐患,这不仅在技术层面给我们提出新的问题,在法律层面也提出了更高的要求。本文介绍了对网络信息安全问题进行法理探讨的背景,并且在分析了国内外研究现状的基础上提出在法律层面解决网络信息安全问题的初步构想。     

Analysis of microwave brightness temperature of lunar surface and inversion of regolith layer thickness:Primary results of Chang-E 1 multi-channel radiometer observation

In China’s first lunar exploration project, Chang-E 1 (CE-1), a multi-channel microwave radiometer was aboard the satellite, with the purpose of measuring microwave brightness temperature from lunar surface and surveying the global distribution of lunar regolith layer thickness. In this paper, the primary 621 tracks of swath data measured by Chang-E 1 microwave radiometer from November 2007 to February 2008 are collected and analyzed. Using nearest neighbor interpolation based on the sun incidence angle in ...