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At first, the rought C〓F〓 mixed gases are obtained by pyrolysis process of R22. A experimental pyrolysis device is designed and made by ourself. The optimum operating conditions are offered in the paper. Secondly, the much efforts is on the synthesis of R134. After through the discussion of basic thermodynamics and kinetics, selecting and preparating catalyst, it is possible that the synthesis of R134 by pyrolyzed gases hydrogenation. Base on the character of catalytic process, the kinetics equation about C〓F〓 catalytic hydrogenation is established. The rate constant of the reaction is obtained through experiment data regression. In order to achieve higher yield of R134, some optimum technological conditions is determined.

论文首先对R22裂解制成四氟乙烯混合原料气的裂解过程进行了讨论，自行设计和制作裂解反应装置，并确定裂解反应的最佳操作条件；然后，重点对R134的合成进行基础研究，分别从热力学和动力学的角度探讨以含四氟乙烯的R22裂解混合气为原料合成R134这一全新工艺的可能性，选择和制备加氢催化剂，根据催化过程特点建立四氟乙烯催化加氢反应的总包动力学方程，并在此基础上自行设计和制作中试合成装置，获得了以裂解混合气为原料合成R134的最佳工艺条件，为R134的工业化生产提供了必要的理论依据和实验基础。

Based on this observation,this dissertation focuses on the study of the rate of convergence of nonlinear rescaling methods for nonconvex second order cone programming.

本论文主要研究非凸二阶锥规划的非线性重新尺度化方法的收敛速度，所阐述的主要研究结果可概括如下：1。

In order to resolve these problems, a method for telemedical image enhancement is preposed in this paper. It's based on DM6437 and improved Retinex algorithm. This paper employs adaptive linear stretching method on the basis of the Global Retinex algorithm to enhance the contrast of the image.

本文提出了一种基于DM6437和改进型的Retinex算法的远程医学图片增强方法，本文在全局Retinex算法的基础上利用自适应的线性拉伸方法增强图像。

In order to improve the precision of strip shape and gauge, the author carried out study on load distribution and set-up calculation on the basis of conventional mathematic models with improved Genetic Algorithms.

本文的主要内容如下：详细的介绍了热连轧带钢负荷分配的发展状况和热连轧设定计算的主要数学模型。

In order to prevent wheat stem lodging and to fertilize precisely, the experiments on the influence of phosphate and potash fertilizers on mechanical properties of wheat stem were performed with Zhengzhou-wheat 9023 as an object. Mechanical properties (such as flexural strength and flexural rigidity) of second base inter-node were measured by six treatments at five growth stages of wheat, which were jointing stage, booting stage, flowering stage, grain-filling stage and maturity stage. Nonmetallic material testing machine was used in the experiments.

为了对小麦精准施肥，提高小麦的抗倒伏能力，该文以郑麦9023为研究对象，磷钾肥配施共6个处理，分别在小麦拔节期、孕穗期、扬花期、灌浆期、成熟期等5个生长期，利用非金属材料万能试验机，对去鞘茎秆作3点弯曲试验，测试茎秆基部第2节间的弯曲强度和抗弯刚度。

In order to explore the influence of the interactions between particles and between gas and particles on the formation of heterogeneous flow structure, a computational study was carried out by using a two-fluid model based on the particle kinetic theory.

应用双流体模型 CFD模拟的方法，从恢复系数和曳力两方面，研究了气固密相流化床中颗粒之间和气固相之间的相互作用对床内非均匀流动结构形成与变化的影响。

Our board knows that the ultimate scorecard on its performance will be determined by the record of my successor. He or she will need to maintain Berkshire's culture, allocate capital and keep a group of America's best managers happy in their jobs. This isn't the toughest task in the world – the train is already moving at a good clip down the track – and I'm totally comfortable about it being done well by any of the four candidates we have identified. I have more than 99% of my net worth in Berkshire and will be happy to have my wife or foundation (depending on the order in which she and I die) continue this concentration.

我们的董事会相当了解，其功过将由其选定接任我的继承者实际的成绩来论定，他或是她必须要能够维持Berkshire的企业文化、分配资金同时让这群全美最优秀的经理人乐在各位的岗位上，这绝非世界上最困难的任务，因为我们的事业早已步入正轨，而我个人对于目前四位可能接替我的人选都感到相当放心，目前我个人将超过99%的身家都摆在Berkshire之上，而往后我也很乐见我太太或基金会将财产继续集中在Berkshire。

In order to resolve the curing technology of loose tobacco curing barn, and spreading it in most tobacco planting area, the series of research of curing capability, technology of loading and curing technology on loose tobacco curing barn were studied. We found out the curing technology of loose tobacco curing barn when adopting nature loading method, the loading density were 75-85kg/m3, and the thermometer were hanged at the bottom layer. This technology was on the base of its own characteristic, it also integrated the technology of the three stage curing technique, and it had the virtue of simplicity of operation, earthliness and understandability, better curing effects, and preferably spreading foreground.

为解决散叶烤房烘烤工艺难题，使其能在广大烟区快速推广，通过对该烤房烘烤性能、装炕技术和烘烤工艺的系列研究，提出了采用自然堆积法装烟，装烟密度75~85kg/m3，温度计挂在一层时的散叶烤房烘烤技术，该技术根据散叶烤房自身的特点并结合&三段式烘烤工艺&，操作简单，通俗易懂，易于被烟农掌握，烘烤效果较好，有较好的推广应用前景。

On the basis of those, the flow field of the three-thread screw element with 45mm and 60mm pitch have also been completed simulating calculation in order to analyze by comparison the different effect on flow fields in the screw elements resulted from the different pitch.

以此为基础，还计算了螺距45mm和60mm的三头螺纹元件的相关流场，用以对比分析螺距对流场的不同影响。

In laser assisted microprocessing, the temperature of the spot irradiated by laser has a tremendous impact on the distribution of impurity concentration, the depth of p-n junction , the resistance of ohm contact and so on. In order to improve the performance of the devices, the temperature of the exposed region should be measured accurately.

在激光微细加工中，激光曝光区的温度对激光诱导扩散生成p-n 结的结深、杂质浓度的分布和激光辅助合金生成欧姆接触的接触电阻等具有决定性影响，必须准确测定。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。