试验

After looking up a large amount of native and foreign information, the materials used in the experiment were as follows: PTFE base, graphite filler, molybdenum disulfide filler, copper powder filler, carbon fiber and so on. The experimental method is that the formula was designed according to uniform experimental method, the relationship between formula and frictional property was found with spline function and then the representative test points were chosen from fitting curve to make verification test for optimization.

经过查阅大量国内外文献资料后确定原料为：聚四氟乙烯树脂为基体，加入石墨、二硫化钼、铜粉、碳纤维等填料；试验方法为：根据均匀试验方法设计配方，用样条函数找出配方与摩擦性能的关系，然后在拟合曲线上选取具有代表性的试验点进行验证试验，达到优化的目的；制备工艺：冷压烧结法制备固体润滑剂。

Its rule of change was obtained. On the basis of other studies, the flocculation kinetics and flocs 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 flocs number and size during flocculation of Yellow River's loess particles without using empirical parameters. The TEM and SEM were used to obsever flocs in the study of floc structure. The flocculation was divided as flocculi, floc and floc aggregate. The flocs structure model was established by assumption that particles position in floc accords with tetrahedron. The fractal dimension of model and experimental flocs was found to be coincident. So 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，在一定程度上能眵反映高分子絮凝黄河泥沙生成的絮体结构。

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 effect of experiment duration and the factors influencing the valid duration of model test are analyzed based on the experimental data given by predecessors obtained from conceptual models carried out in flumes.

结合对概化水槽试验的分析，论述了河流自然模型试验时效的定义、实质及其影响因素，初步得出试验时效与河床组成、河谷比降以及流量的关系，并提出时效的判定指标。

In addition to comparing the simulation with experimental results of compressor rig, the experiments on forcing the engine into stall have been conducted to verify the simulation.

模拟的证实除了和部件试验结果比较外，还专门在发动机试验台上作了逼喘试验。

Sativa meal and both weight gain rate and relative growth rate also increased significantly. The above indexes of fish fed 4% and 12% M. sativa meal were higher than those of fish fed 16% M. sativa meal and were lower for fish fed fresh M. sativa than that of the control group. 2 With increased levels of M. sativa meal in the diets, crude protein content in the muscle of fish fed M. sativa meal increased significantly, while EE and cholesterol were significantly decreased and moisture showed a quadric curve variation. Fish fed fresh M. sativa had no improvement in comparison to the control group. 3 Protease and amylase in foregut, midgut, hindgut and hepatopancreas of C. carpio increased with increased M. sativa meal but the variation was not linear.

试验Ⅰ、Ⅲ组的上述2项指标高于对照组，试验Ⅳ组低于对照组，苜蓿鲜草组低于对照组，但差异均不显著。2和对照组相比，添加苜蓿草粉显著或极显著提高了禾花鲤肌肉中粗蛋白质含量，随着苜蓿草粉添加水平的增加，肌肉中粗脂肪和胆固醇水平显著下降，肌肉中水分含量呈先降后升的二次变化趋势，苜蓿鲜草组的肌肉中粗蛋白质、粗脂肪含量和胆固醇水平无显著变化。3添加苜蓿草粉后对消化道各部位蛋白酶活性及淀粉酶活性有促进作用，均呈先升后降的变化趋势，其中试验Ⅱ组的酶活性最高。

The experiments of single channel system and multi- channel show that the design of the device to measure the forming force of the press is successful, and could be used for production.

对单通道系统的标定试验和中间试验以及多通道系统的电模拟试验表明：压力机成形力检测系统的设计是成功的，系统的检测结果是可靠的，可以用于生产。

The most powerful tool of tribology study is experiment and all kinds of friction testing system is designed and manufactured for friction test.

但在这些摩擦试验系统上都无法实现摩擦速度实时改变的试验，为了验证摩擦速度变化对摩擦磨损情况的影响，同时也为了研究周期性波动摩擦速度变化下的摩擦材料性能和特点，从探讨非匀速摩擦磨损过程的构思出发，提出构建一种非匀速摩擦磨损试验装置。

High-pressure gas shell test should be carried out after hydraulic test case, and have appropriate security measures, the gas shell test pressure should be under 100 (30 ℃) the maximum allowable pressure of 110% or by order of the provisions of , does not allow a visible leak.

高压气体壳体试验应在液压壳体试验之后进行，并要有相应的安全防护措施，气体壳体试验压力应是100下(30℃)时最大许用压力的110％或按定单中的规定，不允许有可见的泄漏。

Basic topics and ideas in the design of experiments: randomization and randomization tests; the validity and analysis of randomized experiments; randomized blocks; Latin and Greco-Latin squares; plot techniques; factorial experiments; the use of confounding and response surface methodology; weighing designs, lattice and incomplete block and partially balanced incomplete block designs.

实验设计：实验设计：试验设计的基本思想和论题：随机化和随机化检验；随机试验的效度与分析；随机区组设计；拉丁方和希腊拉丁方；制图技术；析因试验，混杂法和反应曲面法的运用；加权设计，方格设计和不完全区组设计，部分平衡的不完全区组设计。

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。