无锡在经济转型中前进

无锡是中国近代民族工商业的摇篮之一,解放前即有“小上海”之称。上世纪70年代乡镇企业异军突起,“苏南模式”传遍天下。八九十年代,无锡致力于引进外资,成为日资企业的集聚高地。工业一直是无锡经济的主要支柱。工业发展了,污染也一日重似一日,尤其是近年来太湖蓝藻的连续暴发给无锡敲响了警钟。     

智能电网模式下220kV变电二次设计要点探析

本文主要概述了智能变电站变电二次设计要求的相关内容,并对智能电网模式下220kV变电二次设计的关键技术进行分析,仅供相关人士参考.     

Simulation of Electron-Beam Generating Plasma at Atmospheric Pressure

As electron-beam generating plasma is widely applied, the software tool EGS4 （Electron-Gamma Shower） was used to simulate the transmission and energy deposition of electron-beam in air. The simulation results indicated that the range of the electron-beam was inversely proportional to the gas pressure in a wide range of gas pressure, and the electron-beam of 200 keV could generate a plasma with a density 10^11 cm^-3 in air of latm. In addition, the energy distribution of the beam-electron and plasma density profile produced by the beam were achieved.     

Construction of Larger Area Density-Uniform Plasma with Collisional Inductively Coupled Plasma Cells

The plasma density and electron temperature of a multi-source plasma system composed of several collisional inductively coupled plasma （ICP） cells were measured by a doubleprobe. The discharges of the ICP cells were shown to be independent of each other. Furthermore, the total plasma density at simultaneous multi-cell discharge was observed to be approximately equal to the summation of the plasma density when the cells discharge separately. Based on the linear summation phenomenon, it was shown that a larger area plasma with a uniform density and temperature profile could be constructed with multi-collisional ICP cells.     

SPECT、CT对脊柱关节病的诊断价值

为探讨CT、SPECT对脊柱关节病（SpA）的诊断价值，将临床诊断为SpA的102例患者，包括强直性脊柱炎（AS）63例，未分化脊柱关节病(uSpA）39例，分别进行CT骶髂关节扫描及SPECT全身及骶髂关节局部骨显像。结果显示，SPECT对AS的诊断总阳性率为50.8%（32／63），而且随着病情的发展而下降。CT对检查uSpA的阳性率仅为15.4%（6／39），远低于SPECT的阳性率82.1%(32/39)。因此，SPECT作为早期诊断SpA尤其是uSpA较敏感，并可作为AS治疗监测的重要手段，对临床SpA诊治具有重要意义。     

Influence of La, Y, Gd, Cu, NH4^＋ Ions and DMSO on Luminescent Property of Terbium Complexes with Sulfosalicylate

Ｔｈｅｌａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｏｆｏｒｇａｎｉｃｌｉｇ ａｎｄｓａｓｆｌｕｏｒｅｓｃｅｎｔｍａｔｅｒｉａｌｓｈａｖｅｒｅｃｅｉｖｅｄｅｘ ｔｅｎｓｉｖｅａｔｔｅｎｔｉｏｎ .Ｔｈｅｕｓｅｏｆｆｌｕｏｒｅｓｃｅｎｔｏｒｇａｎｏ ｌａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｒｅｑｕｉｒｅｈｉｇｈｆｌｕｏ ｒｅｓｃｅｎｃｅｉｎｔｅｎｓｉｔｙａｎｄｌｏｗｃｏｓｔｃｏｍｐｌｅｘｅｓ .Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｔｈｅｆｌｕｏｒｅｓｃｅｎｃｅｅｎｈａｎｃｅｍｅｎｔｏｆＴｂ(Ⅲ )ｏｒＥｕ(Ⅲ )ｃｏｍｐｌｅｘｅ…     

关于无穷区间上一类最佳反馈控制系统*

本文提出新的最佳控制问题:在允许集合U={u=α(t)x+β(t)x′|(?)α(t)∈C〔0,T〕,(?)β(t)∈C〔0,T〕}中求u~(?)∈U,在约束x~(?)+α(t)x=u,x(0)=x_0,x′(0)=x_1之下指标J(u)=integral from x=0 to ∞(t;x_0,x_1)dt=min,并证明两个定理,求出了最佳反馈控制u~*的表达式。     

WLAN安全规范WPA的研究

随着WEP协议漏洞的不断曝光,安全问题已经成为无线局域网的最大挑战。首先简要介绍了WEP协议的缺陷,然后通过将WEP和WPA的比较,描述了WPA的框架,且详细分析了WPA中采用的核心技术,如TKIP、EAP、MIC、802．11X。最后介绍了WPA在企业级和家庭、SOHO不同场合的应用。     

汽车空调制冷剂的类型及其系统改进

市场上的制冷剂品种繁多，均以字母R统一代表制冷剂的称谓，在汽午空州系统中基本采用两大类制冷剂，传统空渊制冷剂中含有氯离子，而现代空调制冷剂中不含氯离子成分。     

能否再创辉煌

电子商务不现实 谈到电子商务,机械行业实现网上销售和在线支付目前并不可行.起重机属于专业购买,买一台起重机,对于客户来说相当于买了一个大件商品,客户要亲自来厂家看一看,一台起重机至少要用十几年,而且一次性花费很大,每一个客户在选择的时候都会很慎重.