N,N''-取代邻苯二胺的合成

通过2-取代苯并咪唑盐的还原开环反应制备了8个N,N′-不同取代的邻苯二胺,并经1HNMR、IR、MS及元素分析表征,其中5个未见文献报道.这是一条由邻苯二胺和羧酸经2.取代苯并咪唑制取该类化合物的简洁合成路线.     

SW233 PIN驱动器自动测试系统的研制

介绍了一种集成电路自动测试系统，该系统采用计算机并口作通信接口，用VB6编程，实现了对外围测试电路的控制，用IEEE-488接口卡控制测试仪器，可对SW233电路的36个参数进行自动测试，并将测试结果自动保存在数据库中。该测试系统具有自动化程度高、操作方便、测试结果精确等特点。     

浅谈一次盐水的工艺指标控制

介绍了一次盐水的各项工艺指标对生产的影响以及稳定控制这些指标的方法，强调了在生产中控制好一次盐水的工艺指标是影响产品质量及离子交换膜使用寿命的关键。     

用于光纤并带的UV固化胶粘剂性能的研究

研究了用于光纤带的紫外光固化胶粘剂的剥离性、柔韧性、拉伸强度和延伸率的影响因素。     

Fuel combustion test in constant volume combustion chamber with built-in adaptor

Combustion tests of pre-mixture of methane and air in constant volume combustion chamber(CVCC) have been carried out by means of flame propagation photo and gas pressure measurement,the effects of CVCC body temperature,intake pressure of pre-mixture of methane and air,equivalence ratio and location of the built-in adaptor have been investigated.The whole combustion chamber can be divided into two parts,i.e.the upper combustion chamber and the lower combustion chamber,by the built-in adaptor with through hol...     

集中供热系统适量供热调节技术

集中供热的采暖用户实行计量收费并且具有自调节能力以后,必须要有与用户调节相匹配的运行调节手段,才能实现系统的适量供热.结合集中供热常用的系统形式,分别分析用户、热网及热源在各种运行方式下的调节特性及节能潜力,得出室内系统变流量、循环水泵变转速运行时节能量最高,并给出循环水泵定转速运行及变转速运行下的控制系统方框图.最后指出,应该针对新型供热系统和旧有供热系统的特点,制定相应的整体综合调节策略,才能实现节能最佳.     

人力资本约束下区域主导产业选择方法

为了合理的确立区域主导产业,制定符合区域一级发展模式的主导产业选择基准和相应指标,提出了区域主导产业选择的人力资本匹配基准,给出了相应指标的计算方法.实证结果表明:尽管中国的劳动力资源非常丰富,但整体的人力资本水平却依然很低,同时人力资本分配非常不平均,劳动力过剩和人力资本不足的结构性矛盾日益突出.考虑到中国各区域人力资本分配的地域差距,区域一方面应大力进行人力资本积累,改善人力资本现状,另一方面,正视区域人力资本现状的现实,在区域主导产业选择时理性抉择,才能实现人力资本积累与产业结构升级的同步和有效互动.     

Surface performance of workpieces processed by electrical discharge machining in gas

The surface performance of workpieces processed by electrical discharge machining in gas(dry EDM)was studied in this paper.Firstly,the composition,micro hardness and recast layer of electrical discharge machined(EDMed)surface of 45 carbon steels in air were investigated through different test analysis methods.The results show that the workpiece surface EDMed in air contains a certain quantity of oxide,and oxidation occurs on the workpiece surface.Compared with the surface of workpieces processed in kerosene,fewer cracks exist on the dry EDMed workpiece surface,and the surface recast layer is thinner than that obtained by conventional EDM.The micro hardness of workpieces machined by dry EDM method is lower than that machined in kerosene,and higher than that of the matrix.In addition,experiments were conducted on the surface wear resistance of workpieces processed in air and kerosene using copper electrode and titanium alloy electrode.The results indicate that the surface wear resistance of workpieces processed in air can be improved,and it is related with tool material and dielectric.