羟甲基-双(二茂铁基)丙烷的合成方法研究

双二茂铁丙烷通过Vilsmeier反应得到了一元和二元的甲酰基-双(二茂铁)丙烷.并通过正交实验法获得了较好的产率(一元醛产率约70%～75%)和转化率(80%～86%).一元和二元的甲酰基-双(二茂铁)丙烷经KBH4/CH3CH2OH还原得到了两个新的化合物,即一元和二元的羟甲基-双(二茂铁)丙烷.     

浅议面向对象程序设计中的类与函数

类是面向对象程序设计过程中应用比较多的一个概念,初学者对它的理解总是与结构化程序设计中的函数相混淆,致使最终不能正确地理解并应用面向对象程序设计的特点去开发程序。将类与传统的结构化程序设计中的函数做一简单比较,多角度分析它们的异同,以帮助大家深刻地理解这一概念,最终达到灵活地应用面向对象设计思想开发软件的目的。     

HPLC测定万家寨段黄河水中部分芳烃的含量

应用反相高效液相色谱法测定了万家寨段黄河水中萘、菲、邻苯二甲酸二丁酯的含量.以甲醇—水(体积比68∶32)为流动相,采用WatersBondapakTMODS C18(3.9mm×150mm)色谱柱,在254nm进行测定,测定结果表明萘、菲、邻苯二甲酸二丁酯的含量分别为0.1103μg/L、0.03276μg/L、1.124μg/L.     

高分子负载钯催化下的氯苯加氢脱氯反应

首次考察了载体、碱、温度、在常压氢气氛及均相钯催化剂作用下对氯苯加氢脱氯的影响。筛选结果表明在０．１ＭＰａＨ２和６５℃条件下,ＰＶＰ－ＰｄＣｌ２／ＮａＯＡｃ／ＥｔＯＨ体系可有效还原氯苯。     

Super-service-oriented Architecture in Large-scale Pervasive Computing Environments

This paper proposes an architecture model to support enhanced system performance in large-scale pervasive computing environments. The muitiformity of device （or peer ） services and network types in such environment is apt to result in notable service isomorphs. And moreover, as the environment cannot assure the stability of network communication and device services, the situation gets worse. Therefore, it becomes urgent to simplify user operations and let them take full and highly efficient advantage of the environments. Super-Service-Odented Architecture （SSOA） is an Serrice-Otiented Architecture （SOA）-based architecture for service management and organization in peryasive environments. With combining one kind of isomorphic services into a super service, SSOA provides better scalability and quick, convenient service invocations. Also, the complexity and instability of services, and network types are transparent, and system performance is highly promoted under the architecture.