伏安

The principle and method for determining the total acid number of oil product by voltammetric techniques was described,the results of voltammetric techniques and standard method analysis were compared.

介绍了用伏安法测定石油产品总酸值的原理、方法，并将伏安法测定润滑油酸值的结果与标准方法测定结果进行了比较。

In the detection experiments, the scan rate is set at 0.3 V/s under the analysis of linear sweep voltammetry. On the cyclic voltammetry plot, each pair of clear redox peaks was observed for 4-chlorophenol (4-CP), 2,4-dichlorophenol (2,4-DCP), and penta- chlorophenol. The potentials of the redox pairs were 1.218 and -0.460 V for 4-CP, 1.128 and -0.448 V for 2,4-DCP, and 1.037 and -0.473 V for PCP.

在侦测污染物的实验之中，使用0.3 V/s做为线性扫描伏安法的最佳扫描速度，利用循环伏安法扫描可测得4-氯酚、2，4-二氯酚及五氯酚水溶液中氧化与还原波峰，4-氯酚的氧化与还原电位为1.218与-0.460 V、2，4-二氯酚之氧化与还原电位为1.128与-0.448 V及五氯酚之氧化还原电位为1.037与-

In addition, the voltage-current characteristic of linear resistive components is the general solution of Clairaut equation, and the voltage-current characteristic of non- linear components is the singular solution of Clairaut equation.

论文摘要：本文讨论了任意伏安特性电阻元件满足的基本微分方程以及非线性电路的功率匹配问题的几个定理，指出任意伏安特性电阻元件均满足非线性一阶的clairaut方程，并且，线性电阻元件的伏安特性是clairaut 方程通解，而非线性电阻元件的伏安特性是clairaut 方程的奇解。

At last, adsorbent and covalent Ag nanoparticles modified electrodes were prepared by adsorbent and covalent method, respectively. The electrochemical behaviours of SCN-, brilliant cresyl blue and nicotinamide adenine dinucleotide on modified electrode were studied by Cyclic voltammetry, differential pulse voltammograms and electrochemical impedance spectroscopy.

最后，用吸附法和共价键合法制备了吸附型和共价自组装银纳米修饰电极，采用循环伏安法、示差脉冲伏安法和交流阻抗谱等电化学方法研究了SCN-、灿烂甲酚蓝和还原型烟酰胺腺嘌呤二核苷酸的电化学行为。

The purpose of the study was to investigate the mechanism of nickel-tungsten electrodeposition.

为进一步探讨镍钨合金的电沉积机理，采用循环伏安法和电位阶跃法研究了玻碳电极上镍钨电沉积的循环伏安特性和初期行为。

From the result of CV, it can be concluded that azomethine diamine and p-amino-phenyl-9-ethyl- carbazolyl azomethine possess electrochemical activity, and the electrochemical activity arised from the heteroatom of molecules.

我们用循环伏安表征了化合物的电化学性质，从循环伏安的结果来看，偶氮甲碱二胺和对氨基苯基-9-乙基咔唑基偶氮甲碱具有一定的电化学活性，并且这些电化学活性主要来自分子中的杂原子。

In this paper, diode bridge method instead of volt-ampere characteristics of the voltammetry measurement, to exclude the impact of a meter, the result shows that the results of voltammetric curves and the real would like to close, is a better measurement method.

翻译下面的句子摘要：本文采用电桥法测量二极管的伏安特性来代替伏安法测量，排除了电表的影响，结果证明，伏安曲线与真实结果想接近，是一种较好的测量方法。

Moreover, adsorptive property of compound on electrode was studied by some methods, such as linear sweep voltammetry , normal pulse voltammetry , electrocapillary measurement , cyclic voltammetry.

此外，还利用线性扫描伏安法、常规脉冲伏安法、电毛细管曲线法、循环伏安法等方法研究了体系物质在电极上的吸附性质。

As a result, distorted responses were observed in ac and ER voltammograms, and the real and imaginary parts in ER voltammogram changed in different ways during potential sweep. The differences between the forward and the reverse scans in the cyclic ER voltammogram reflected the extent of the loss of the reoxidation activity of the film.

因而，在ER和交流伏安图上观察到不同程度的信号变形；在电位扫描过程中，ER伏安图上的实数和虚数部分发生不同的变化；而ER循环伏安图上正反扫的差异变化反映了沉积膜重新氧化活性损失的程度。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐