为私密文件养只大狼狗

数据安全问题越来越受到重视,如果平时不重视自己的数据安全,你便有可能成为下一个"艳照门"受害者!如何保护自己的机密数据呢?除了养成良好的使用电脑习惯外,为你的机密数据养条看门的"大狼狗"(下载地址:http://www.dalanggou.com/web/index.php,快车代码:CF0810CMRJ11)也是一个有效的防范手段."大狼狗"是一款非常出色的免费数据加密软件,使用起来也非常简单。     

听外语歌曲So Easy!

我喜欢听外国歌,很多朋友也和我一样,开始并不知道在哪里能获取最新的外语歌曲,这里也推荐给大家使用酷狗音乐盒。下载安装好酷狗音乐盒(下载地址:http://download.kugou.com/2008.快车代码:CF0810SZDM02)。运行软件后,点击"音乐"按钮,打开Web窗格。在窗格中点击"排行榜"标签,这时你就可以看到"酷狗日韩榜"和"酷狗英文榜,点击后就可以看到近期好听的日、韩、英语歌了,想听哪首点击就会开始     

你用的是高档的大闸蟹吗? Realtek集成声卡也分高中低档

众多主板上标识着采用高档HDAudio音效芯片,ALC888,而各大媒体也统一说辞,凡提及HDAudio必说到采用最好的ALC888,且不谈集成声卡是否音质够好,ALC888真的是集成声卡里最好的吗?实际上大家都被欺骗了,888其实是     

惹不起我躲得起,换个DNS避广告

中国电信推出广告推送业务的时间已经不短了,很多人深受其扰。除了向电信的客服投诉外,其实我们还可以从技术的角度来解决它。电信的DNS服务器分为两种,一种是有广告推送的,其表现就是在打开网页时,页面请求DNS解析那一步,给你解析出来一个广告页面(或者在要访问页面内嵌入广告框架),     

基于XML的跨组织工作流程整合架构研究

利用XML语言的自我描述功能及跨平台特性,作为数据交换的信息载体,提出一个以XML为基础的工作流程系统整合架构。当系统产生所需的XML文件时,会触发相对应的工作流程程序,在跨组织或异质性系统间达到信息传递与整合的功能。以XML作为文件主要信息承载的媒介,可以让整个过程具有广泛而多元的表示能力。可以表示的内容包含相关公文信息、流程描述、流程核销记录等。并结合系统定义的映射文件转换规则,同时达到异质性信息库横向整合的目的。     

基于UML的医院门诊管理信息系统

UML是一种重要的面向对象软件开发方法,本文简述用UML进行系统建模的方法和步骤。以医院门诊管理信息系统为例,讲述如何利用UML对其进行需求分析、系统设计、实现及测试的具体过程。     

群体间竞争与协作的遗传算法解决旅行商问题

旅行商问题是经典的NP难组合优化问题之一,快速有效地解决旅行商问题具有重要的理论和实际意义。受自然界物种群体间相互联系的启发,提出了群体间竞争与协作的遗传算法来解决旅行商问题。该算法在迭代的过程中,每次只选择竞争力大的种群进行进化,同时为了维持各个种群间发展的平衡,对它们进行周期性的交流,能促使进化过程中中好的基因模式迅速地在各个种群中传播,提高了整体的进化速度。此算法不但能有效地维持群体的多样性,而且能提高收敛的速度。通过对旅行商问题的仿真实验,证明了该算法的可行性与有效性。     

Fabrication of silicon membrane using fusion bonding and two-step electrochemical etch-stopping

A new type of silicon membrane structure was fabricated using wafer fusion bonding and two-step electrochemical etch-stopping methods. An active wafer of p-type epi/n-type epi/p-type substrate was first elctrochemically etched to form a shallow cavity on the p-type epitaxial layer. Then, the cavity-formed side was fusionally bonded with p-type silicon working wafer and, afterwards, the p-type substrate of the active wafer part was removed by a second electrochemical etch-stopping leaving only the n-type membrane on the shallow cavity. Using the new membrane structure in mechanical sensors, more precise control of cavity depth and membrane thickness was achievable and the influence of crystalline imperfections on the sensing circuits located near the bonding seam was avoidable.     

Characteristics of Fe/AlPO4-5 catalyst prepared with organic solution

The Fe/AlPO₄-5 catalysts are prepared by impregnation with aqueous and organic solution (acetic acid, alcohol and acetone) of iron(III) nitrite respectively. The characterization of catalyst by means of XPS, Mössbauer spectroscopy, TPR and CO hydrogenation is reported. The catalyst prepared with the aqueous solution has no activity for CO hydrogenation because the Fe(III) in the catalyst cannot be reduced to -Fe. However, the catalysts prepared with organic solution possess obvious hydrogenation activity, in which -Fe is present in the initial reduced catalyst besides Fe³⁺ and Fe²⁺. The results may be explained by the interaction degrees between the metal and the support induced by the different impregnation solvents.     

Efficient encoding algorithms for computer-aided design of diffractive optical elements by the use of electron-beam fabrication

One of the general requirements of a computer-aided design system is the existence of efficient (in data size and running time) algorithms that are generally reliable for the broadest range of design instances. The restricted data formats of the electron-beam machines impose difficulties in developing algorithms for the design of diffractive optical elements (DOE's) and computer-generated holograms (CGH's). Issues that are related to the development of CGH algorithms for e-beam fabrication of DOE's and CGH's are discussed. We define the problems the CGH algorithms need to solve, then introduce general curve drawing algorithms for the e-beam data generation of diffractive optical components. An efficient algorithm for general aspherical DOE's is proposed. Actual design and fabrication examples are also presented.