初步数据

At the end of the course students will be able to apply the transmission theory to the performance analysis and design of different transmission system.

使学生了解现代通信系统的组成，初步掌握对各种通信系统的分析与设计，学会分析各种数据信号、信号编码在信道中的传输性能。

Based on the technological theory of quick-cooked rice, by a series of variance trial and taste trials the paper gives the best technological conditions of quick-cooked rice soup ( cooking time 20 min., soak time 60 min, and soak temperature 45℃) and provides basic data for ist production on a large scale.

本文以速煮米生产工艺为指导，通过一系列正交试验和品尝试验，初步摸清了速煮粥生产工艺各个环节的最佳条件，为速煮粥大规模生产提供了基本数据。

Through documents checking and data collecting,this paper analyzed the items and values of input/output parameters of N cycling in stock farming system,and ascertained the estimation parameters of N balance in the system,which could offer the theoretical foundation for nutrient management in animal husbandry ...

本研究对该系统的N输入、输出项参数进行分析讨论，包括平衡计算中每一个输入和输出项需要的参数种类、参数的选择以及建议采用的数值。讨论过程参考了大量的文献资料和统计数据，初步确定了我国畜牧系统N养分平衡计算参数。

Through the data provided by regular wave model experiment, a dynamicanalysis model and the corresponding numerical analysis method are checked andproved to be reliable which will provide theory instruction to dynamic design methodof breakwaters.

通过实验室提供的规则波模型实验数据对论文中使用的动力分析模型和数值模拟方法进行验证，证明了动力模型及相关理论的可靠性，为实际工程的初步设计提供了理论基础。

According to the preliminary estimations, the cost of distributed system storage data will be about 1 dollars for giga-byte.

根据初步的估计，成本的分布式系统存储的数据将约1美元的千兆字节。

According to the preliminary estimations, the cost of distributed system storage data will be about 1 dollars for giga-byte.

据初步估计，成本的分布式系统存储的数据将约1美元千兆字节。

This proposed scheme had been incorporated into science data grid project of CAS. Preliminary results demonstrate its flexibilities and effectiveness.

在中国科学院e-science科学数据网格项目中的初步应用实施表明了该模型的灵活性和有效性。

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。

I am sure after a few weeks of adaptation and familiarization I will have no difficulty in functioning on a daily basis in an English speaking society or in participating fully in graduate studies.

在大学的三年的学习生活不仅给予我自身的充实，更重要的是磨练和培养了我较强的自觉能力和严谨，踏实的作风以及不怕困难的精神，对未来充满了信心！

As the first volcanoes erupted, one of the gases that bellowed out was steam.

在第一批火山喷发时，喷出的气体之一就是水蒸汽。