学位论文

On the termination date, the cultured explants were all examined by Western blot, HE and transmission electron microscope. Our results showed that after 12-days in culture, the cultivation treated with AS-ODN reduced the synthesis of AMBN and had a deformed dental cusp with thinner enamel matrix. Ultrastructure analyses showed that there was hardly any cisternae of the rough endoplasmic reticulum in the ameloblasts at the tip of the cusp of AS-ODN treatedexplants. However, on average the enamel matrix was thinner compared with that in the control group. Furthermore, the collagen fibers in extracellular matrix were found disorganized. These findings seemed to provide a direct experimental evidence that tended to indicate that the arrested AMBN translation in cultured tooth germs might result in the delay of the tooth development.

经用Western蛋白印迹检测表明，所设计的反义核酸对AMBN InRNA具有良好的封闭效果并成功阻断了牙胚对AMBN的表达；在缺乏AMBN情况下，与对照组相比，实验组牙胚在体外可以继续生长发育至钟状晚期，出现成釉细胞和成牙本质细胞的分化，成釉细胞可以分化成为分泌期型成釉细胞，胞浆中缺少合成蛋白质所必需的粗面内质网和高尔基氏体，缺乏溶酶体，表明对蛋白合成和脚的能力降低；实验组牙胚有牙尖形成和基质分泌，但牙尖形态异常，基质形成减少，牙尖周围基质最厚处为O.6卜m，明显薄于对照组的5.spin，基质中胶原纤维粗细不等，排列稀疏， 3 第四军医大学硕士学位论文未见钙化现象，充分证明了AMBN在牙胚发育中参与釉质基质形成和矿化过程，影响胶原纤维和牙本质基质的合成，促进成釉细胞对蛋白质的合成和釉质基质蛋白降解。

Three conditions of spermatogenic cells coculture with Sertoli cells in vitro were studied in the third experiment.

通过观察在这三种不同培养条件下生精细胞体外共广西医科大学硕士学位论文生精细胞体外培养的研究培养的生长行为、培养前与培养后不同时间内细胞的存活率以及生精细胞体外分化情况，进行统计学分析比较。

When subjected to single action of bittern attack or combined actions of bittern attack and wetting-drying cycles, damage of OPC, APC, and HSC are mainly due to chemical corrosions, resulting in several attack products, and also due to crystallization of NaCl-KCl.

在正常温度的单一腐蚀因素和等双因素作用下，OPC、APC和HSC的腐蚀破坏以形成多种腐东南大学博士学位论文蚀产物的化学腐蚀为主，NaCl-KCl物理结晶腐蚀为辅。

Finally, some strategies are formulated on how to reduce the deviances in the operation of supervision system.This thesis is divided into six parts.Part One analyzes the constitution of public power supervision system in current rural communities, centering on the target, main body and content of supervision based on my analysis of this research background.

浙江师范大学硕士学位论文文章共分为六个部分：第一部分，在分析本文研究背景的基础上，文章从监督的对象、监督的主体、监督的内容等几个主要监督外在形式要素出发，对现阶段的村社区公共权力监督体系的构成进行了分析。

Then introduced the composing structure and working principle of hydraulic excavators.

然后介绍本学位论文的研究意义和主要研究内容。

Applying the theories of thermodynamics and mechanics, the working process of basicAPE--single-stage expansion, is analyzed and its related mathematicmodel is built up. The simulation methods based on this model are discussed, which is the preparation for the later research work.Chapter 3: The working characteristics of the single-stage expansion engine are researched on by the simulation.

运用热力学和力学理论对最基础的气动发动机——单级膨胀气动发动机的工作过程进行了研究分析，建立了相应的数学模型，讨论了应用该模型对气动发动机进行理论分析的仿真计算方法，浙江大学博士学位论文：气动发动机探索性研究为后续理论研究打下基础。

Accordingly the whole understanding to the pressure and velocity state of flow field around high-speed train is comprehended.

从而得第 11页西南交通大学搏士研究生学位论文到列车外部流场中压力和速度分布状况的较为完整的认识，为列车的强度设计，列车周围设施的抗风设计以及路边作业人员的安全和行为规范的制定提供了一个可资参照的依据。

Its rule of change was obtained.On the basis of other studies,the flocculation kinetics and floes structure was studied. By making some assumptions, collision frequency were presented.Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict floes number and size during flocculation of Yellow River's loess particles without using empirical parameters.The TEM and SEM were used to obsever floes in the study of floe structure.The flocculation was divided as flocculi,floc and floe aggregate.The floes structure model was established by assumption that particles position in floe accords with tetrahedron.The fractal dimension of model and experimental floes was found to be coincidentSo the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符西安建筑科技大学博士学位论文合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能够反映高分子絮凝黄河泥沙生成的絮体结构。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

During my work, I have generally studied the honeypot, I design a network security architecture by using honeypots.

在学位论文工作期间，我对蜜罐进行了系统的理论研究，在此基础上，初步设计了一个包含蜜罐系统的网络安全架构。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。