基于Delphi的微机数据采集监测系统开发

计算机对化学实验数据进行实时采集和处理具有效率高和可靠性好等优点 ,以往采用单片机、PLC系统的较多 ,为了改进系统的设计 ,采用自行设计的小信号调理接口板、智能数据采集模块、RS - 485网络与微机连接的硬件设计 ,以及先进的Delphi语言和面向对象的软件开发技术 ,成功地开发出一种通用、任意通道的微机数据采集监测系统。该系统通用性和扩展性好 ,可以进行多通道、远距离的数据采集。系统硬件、软件和网络结构设计灵活 ,功能强大 ,首先在 72 1型分光光度计上得以成功应用 ,并可广泛应用于多种化学实验和相关科学研究与教学中     

Estimating the Removal of Anthropogenic Organic Chemicals from Raw Drinking Water by Coagulation Flocculation

A mathematical model was developed to estimate the efficacy of coagulation–flocculation treatment for removing neutral hydrophobic organic chemicals from raw drinking water. The model assumed that the only significant removal mechanism was the destabilization and settling of organic matter containing sorbed anthropogenic organic compounds. The model was validated with standard jar tests using compounds with a range of hydrophobicities (log?Kow = 1.89?to?5.48), including contaminant candidate list chemicals, pesticides, pharmaceuticals, and endocrine disrupting chemicals. Final concentrations of test compounds after coagulation and flocculation were in good agreement with model estimations for synthetic waters composed of Aldrich (Milwaukee, WI) humic acid solutions. The final compound concentrations in coagulated natural waters from two drinking water reservoirs were about 80% lower than those estimated with the model. Overestimations of treated water concentrations by the model were attributed to an increase in sorption by natural organic matter when coiled in aluminum hydroxide flocs, compared to sorption to dispersed natural organic matter in untreated water.     

Grid-Controlled Lightpaths for High Performance Grid Applications

Grid applications call for high performance networking support. One attractive solution is to deploy Grids over optical networks. However, resource management in optical domains is traditionally very rigid and cannot successfully meet the requirements of Grid applications, such as flexible provisioning and configuration. In this paper, we present a customizable resource management solution for optical networks where users can create lightpaths on demand and manage their own network resources. Thanks to a Grid-centric system architecture, lightpath resources can be shared among users and easily integrated with data and computation Grids.     

新式笔记本电脑

有谁相信Intel和MIcrosoft所说的一切吗7我也不相信。所以我对过去两周PC Magazine实验室的结果感到吃惊：配备新型1.6GHz Intel Pentium M CPU的centnno系统堪与配备3.06GHz台式机芯片的笔记本媲美，Centrino系统的电池寿命几乎是近期的高端笔记本的两倍。Centrino笔记本几乎具备我们所希望的以及Intel所声称的一切优点。     

更好的浏览器

就性能而非市场份额来说,Opera一直是MicrosoftInternet Explorer的强有力的替代产品在过去两周,我一直在使用Opera 7.1作为我的主要浏览器。我想说它给我的印象深刻。就性能而非市场份额来说,Opera(www.opera.com) 一直是Microsoft InternetExplorer的强有力的替代产品。我感觉Opera比IE要快,并且它还有一个很棒的下载管理器,在一个单独的屏幕上保留着下载文件。再加上一个弹出式阻截器和带有标签的界面,可以将你打开的页面限定在Opera主窗口内。多元搜索窗口把你的搜索请求发送到Google 和AlltheWeb,然后在并列的窗口显示结果。对O…     

2003年采购指南

现在名牌笔记本电脑也卖到1000美元以下了,你也该想想你的下一台PC是否应该是笔记本     

Using network hacking techniques to disrupt military operational networks

It starts in a small way. An Internet-originated electronic mail message received by various technical ratings and Combat Information Center (CIC) officers on a ship deployed in a very high threat area of the Persian Gulf relays news of a natural disaster involving their families that supposedly occurred during a cookout:     

Personal security

I am sitting on a plane, listening to two executives outline their strategy for a major buyout of a bridge/router vendor. Since I am a geek and understand what they are talking about, it's an interesting set of tactics that they are considering to get the price of the company down to something they want. What's even more interesting is how open they are with what they are talking about and, even more, I know the president of the company which they are planning to acquire. It would be very easy for me to make a phone call when we land and completely trash all their plans.     

A local and global tour on MOMoT

Software and Systems Modeling - Many model transformation scenarios require flexible execution strategies as they should produce models with the highest possible quality. At the same time,...