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正如在任何转换过程中，信息可能不小心被更改或删除。

a kind of design project of multifunction electric power quality gauged instrument based on virtual instrument is put forward in this article.this system integrates virtual instrument programming and power electronics together,to realize diverse signals of current electric power quality field allin one.the integrated signal generator unit which carries out the collection of high speed digital data,d/ a conversion and analog output in four channels,unsymmetrical synchro control fifo etc.by fpga are introduced,the flow of electric power system various signal which generates by vc programming is elaborated,and the structural design of signal amplification unit is analysed.the experiment text result shows that this gauged instrument has attained current advanced high grade of accuracy and it will accelerate the steps of electric power quality calibration because of its accuracy and versatility.

摘 要：提出一种基于虚拟仪器技术的多功能电能质量标定仪的设计方案，采用虚拟仪器编程技术和电力电子技术相结合实现集目前电能质量领域的多样信号于一体。介绍采用fpga实现高速数字量采集、d/a转换及4通道模拟量输出、非对称同步控制fifo等的集成信号发生单元，阐述利用vc编程实现的电力系统多样信号的产生流程，分析信号放大单元的结构设计。实验测试结果表明该标定仪达到目前先进的高精度等级，由于其准确性和多功能性将加快电能质量标定的步伐。

The effects of various reaction conditions were studied by GC analysis. Reaction time has slight effect on the conversion of acenaphthene. The selectivity of N-phenyl aminoacenaphthene increases with reaction time. Biacenaphthenyls or N-phenyl aminoacenaphthene is in the majority, 77.6% or 90.2% when the molar ratio of AlCl3 to acenaphthene is 1.2 and 2.4 respectively.

GC考察了不同反应条件对苊转化率和产物选择性的影响，时间对苊转化率影响不大，N-苯基氨基苊的选择性随着时间增加而增大；随着AlCl3用量的增加，苊转化率和N-苯基氨基苊的选择性随之增加；AlCl3与苊的摩尔比为1.2和2.4时，产物中联苊和N-苯基氨基苊的选择性分别达到77.6%和90.2%。

At this temperature, the selectivity of acrylonitrile is 92.7% and the conversion of acetonitrile is 19.9%.

在反应温度为400℃时，Mn_(0.2)/BaCO_3催化剂上丙烯腈的选择性为92.7%，乙腈的转化率为19.9%。

A comparison of using two different nitriles, acetonitrile and benzonitrile, shows that benzonitrile gives higher conversion.

通过以乙腈和苯甲腈分别作为反应用腈的对比实验发现，苯甲腈的效果优于乙腈。

Under appropriate conditions, the conversion of acetophenone could be as high as 100% and the enantiomeric excess of-1-phenylethanol exceeded 99.0%.

在合适的条件下底物苯乙酮的转化率高达100%，产物-1-苯基乙醇的对映体过量值大于99.0%。

Conversion and 79.1% ee were obtained for acetophenone under optimized conditions.

实验结果表明，离子液体介质中的纳米钌催化剂体系具有良好的催化活性和对映选择性。

The results indicate that the acetophenone conversion is affected orderly by substrate concentration, reaction time, reaction temperature and yeast concentration.

结果表明，影响苯乙酮转化率的因素依次为底物浓度、反应时间、反应温度和酵母浓度，影响1苯基乙醇对映选择性的因素依次为反应温度、底物浓度、酵母浓度和反应时间。

A gas chromatographic method to determine the conversion of asymmetric hydrosilylation of acetophenone has been established.

建立了由气相色谱法测定苯乙酮不对称硅氢化反应转化率的定量方法，操作简便、迅速，重复性和精密度较好，多个样品各重复6次的变异系数均小于1％，且结果与1HNMR法测定结果一致。

Under the optimal conditions 1.5×10~(-3 mol/L of 22, 1.0 MPa of O_2, 120℃, 20 h, the conversion of ethylbenzene was 37.8%, and the selectivity for acetophenone and 1-phenylethynol was 82.5% and 13.5% respectively.

在22浓度为1.5×10~(-3)mol／L，氧气压力为1.0 MPa，120℃反应20 h，乙苯转化率为37.8％，苯乙酮的选择性为82.5％，1-苯基乙醇的选择性为13.5％，锰配合物23次之。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。