数据采集与监控软件Genie

Genie是具有国际先进水平的数据采集与监控软件，它提供了一个面向对象的图形化用户界面，因此简化了数据采集过程、控制应用程序开发和操作员界面。本文介绍了Genie的特点、功能、基本用途以及VISUALBA－SIC在设计这类监控软件中的作用。     

21世纪中国水价、水权与水市场建设研讨会召开

“21世纪中国水价、水权与水市场建设研讨会”于2001年3月20日在广西壮族自治区北海市开幕.在为期两天的研讨会上，有来自全国各地的近170位水行业的代表讨论和交流了中外水权和水价问题. 开幕式由主办方代表刘思政主持，广西壮族自治区水利厅副厅长陈中宁首先发表讲话，他代表广西对代表的到来表示欢迎，随后他向代表们介绍了广西的水价以及在水市场方面的情况.他说，此次研讨会的召开对广西水市场工作有指导意义. 参加会议的领导还有：中国水利经济研究会理事长陈美章、水利部经调司领导魏炳才、太湖流域管理局副局长叶寿仁、江苏省水利厅副厅长徐俊仁、湖南省水利厅副厅长皮颂妥、珠江水利经济研究会常务副理事长李志远. “21世纪中国水价、水权与水市场建设研讨会”引起了各新闻媒体的关注，水信息网、中国水利报、水利水电技术杂志、三联生活周刊、中国环境报等都派驻记者进行报道. (摘自“中国水利科技网”2001年3月20日)     

Structural Description of Polyaromatic Nucleus in Residue

The proton nuclear magnetic resonance spectroscopy （1H-NMR）, the synchronous fluorescence spectrometry （SFS） and the ruthenium ions catalyzed oxidation （RICO） method were used to determine the chemical structure of polyaromatic nucleus in Oman residue fractions. The results of 1H-NMR analyses showed that the average numbers of aromatic rings in the aromatics, resins and asphaltenes units were 3.2, 5.6 and 8.2, respectively. SFS was used to investigate the distribution of aromatic rings in residue fractions, the main distribution range of aromatic rings in aromatics, resins and asphaltenes were 3 4 rings, 3--5 rings and more than 5 rings, respectively. The aromatic network in residue fractions was oxidized to produce numerous carboxylic acids. The types and content of benzenepolycarboxylic acids, such as phthalic acid, benzenetricarboxylic acids, benzenetetracarboxylic acids, benzenepentacarboxylic acid and benzenehexacarboxylic acid disclosed the condensed types of aromatic nuclei in the core. The biphenyl fraction （BIPH）, the cata-condensed fraction （CATA）, the peri-condensed fraction （PERI） and the condensed index （BCI） were calculated based on the benzenepolycarboxylic acids formed. The results implied that there was less biphenyl type structures in all residue fractions. The aromatics fraction was almost composed of the cata-condensed type system, and the asphaltenes fraction was wholly composed of the peri-condensed type system, while in the resins fraction co-existed the two types, herein the peri-con- densed type was predominant over the cata-condensed type. Based on the analytical results obtained in the study, the components --aromatics, resins and asphaltenes -- were given the likely structural models.     

非直喷式柴油机气缸内NO_x 的变化历程:实验数据与模型预测的对比(英文)

用全气缸取样系统测量了一台小轿车用非直喷式柴油机气缸内 NOx 浓度的变化历程。共测量了11种工况。发动机转速为1000和1500r/min,负荷范围对应当量比0.32到0.94。还考察了喷油正时和废气再循环的影响。实验数据与用麻省理工学院为此发动机发展的燃烧模型所作的预测作了对比。一般来说,模型结果与实验结果相当吻合。主要的差别是模型未能预测缸内实测 NOx 浓度高于排气浓度这一点。     

我的手机你别想动

谁都有自己的秘密，而作为最容易泄密的工具——手机，又该如何防范呢？其实只须利用两款小软件MumSMS和《通讯加密》，即可完成从短信到通话记录的完全加密。这下，就再也不用躲躲藏藏地用手机了。[编者按]     

欢乐国庆音乐手机任我选

在本刊9月上期杂地中，我们对当前最热门的两款音乐手机做了一个PK。但有许多读者朋友来信说介绍的机型太少，不过瘾……读者就是上帝，你们的需求就是我们的方向。因此小编在本期特意准备了五款不同价位的经典机型，以供大家选择。[编者按]     

SECANT-FUZZY LINEAR REGRESSION METHOD FOR HARMONIC COMPONENTS ESTIMATION IN A POWER SYSTEM

In order to avoid unnecessary damage of electrical equipments and installations,high quality power should be delivered to the end user and strict control on frequency should be made, Therefore, it is important to estimate the power system's harmonic components with higher accuracy. This paper presents a new approach for estimating harmonic component in a power system using secant - fuzzy linear regression method. In this approach the non - sinusoidal voltage or current waveform is written as I linear function. The coefficient of this function is assumed to be fuzzy number with a membership function that has center and spread value. The time dependent quantity is written as Taylor series with two different time dependent quantities. The objective is to use the sample obtained from the transmission line to find the power system harmonic components and frequencies. We used an experimental voltage signal from a sub power station as a numerical test.     

提高冶金设备产品质量之浅见

产品质量是一个国家经济和技术水平的综合反映,是企业素质的重要标志,从一个侧面也反映了整个民族的素质。企业应当把生产高质量的产品作为对社会的责任和使命,作为坚持社会主义企业经营方向的基本原则之一。在1990年的全国冶金工作会议上,戚部长要求“全行业都要把产品质量、品种工作放在首位”。又在全国冶金科技质量工作会议上指示:     

水电站水锤数值计算

水锤计算是水电站水力过渡过程计算的重要内容,本文采用特征线方法,建立了水锤计算的特征差分格式。分析了串联管道、分岔管道、阀门和各种调压室的边界条件,着重讨论了水轮机组的边界条件和计算方法。由此编制的计算程序可适用于各种常规机组和水泵水轮机组(抽水蓄能电站)水锤计算,还可直接应用于泵站停泵水锤计算。