进行实验

Experiment and flow visualization are conducted in a water-filled cavity which cover the range of Ra=1×10〓----6×10〓 and Pr=3. 3---6. 5. Similarity theorem is applied in analytical investigations. And core region stratification effects to heat transfer are studied. By using scale analysis, temperature and velocity profiles in turbulent natural convection boundary layer are obtained. The results reveals that for turbulent natural convection in enclosures, the bulk of the cavity fluid is essentially statement with thermally stratified temperature and the only substantial motion is that in the boundary layer along four side walls.

在实验方面，作者在高Ra范围内（Ra〓=1×10'~Ra〓=6×10〓，Pr=3.3~6.3）对封闭空间实验台以蒸馏水为介质进行了换热实验与流动显示；在理论分析方面，作者采用相似原理导出了分析解；研究了核心区温度分层规律及其对换热的影响；另外还运用尺度分析法探讨了紊流自然对流边界层温度与速度分布。

First of all, the relationship between strain and pressure of slide valve membrane sensor under different loads was analyzed and simulated by using ANSYS software; then an experimental device was designed and used to calibrate the slide valve membrane sensor.

首先采用ANSYS软件模拟了阀瓣膜传感器承受不同载荷下的应变与压力的关系；同时也设计了一套阀瓣膜传感器的标定实验装置，利用该实验装置对阀瓣膜传感器进行了标定实验。

In this paper,the method of linear stability analysis is used to study the onset of slugging for oil-gas two-phase flow in a horizontal tube.

实验是在西安交通大学多相流国家重点实验室的油气实验台上进行的，实验台的结构简图见图1。

In the second experiment, the design of tow stype and crossover experiment was still adopted. Experimental subject and grouping method were same as the first experiment.

第二部分实验仍采用随机两阶段交叉实验设计方法，实验对象和分组方法同前，所不同的是进行情绪状态的评估。

In this thesis, three major achievements were made in theoretical study: conditions and rules for preparing nano-powders by chemical precipitation are analyzed from the point of view of thermodynamics and kinetics, the principle, standards and experimental method for the aqueous dispersion of nano-scaled metal oxide powders were proposed and verified, mathematical model of nano-filming addition of dopants by chemical coprecipitation was established. In experimental research, nm-ZnO, nm-Bi〓O〓, nm-Co〓O〓 and nm-MnO powder with spherical shape, narrow particle size distribution and small particle size were prepared successfully, highly stable and dispersive aqueous suspensoid of nm-ZnO, nm-TiO〓, nm-Co〓O〓 and nm-MnO powder were prepared successfully and surface modification on these nano-powders was also achieved, 0-3 nanocomposite ZnO varistors with nm-ZnO, nm-TiO〓and nm-MnO respectively were prepared successfully by conventional mechanical attrition, and exhibited much better electrical properties than those of conventional varistors.

综上所述，本文在理论研究方面取得了三项成果：（1）从热力学和动力学角度推导并分析了液相化学沉淀法制备纳米粉体的反应条件和规律，（2）提出了纳米氧化物的水分散体系的设计原理、规范和通用实验步骤，（3）提出了共沉淀的数学模型和计算方法；在实验方面所取得的成果有：（1）成功制备了粒度小、分布窄、形貌对称的纳米氧化锌、纳米氧化铋、纳米氧化钴和纳米氧化亚锰，（2）成功地制备了纳米氧化锌、纳米二氧化钛、纳米氧化钴和纳米氧化锰的高稳定分散悬浮液并实现了干粉体的表面改性，（3）成功地进行了纳米氧化锌、纳米二氧化钛和纳米氧化锰对压敏电阻的0—3复合掺杂实验，试样性能远优于常规压敏电阻，为实现压敏电阻的高能高压化提供了新的方法和思路。

The function of health protection of DF was investigated using the dregs and DF of white trumpet lily and tiger lily as test materials with mices, in which the samples were prepared to the concentrations of 1.6g/kg, 7.8g/kg, and 15.6/kg body weight. The results as follows:Effects of the DF on the gastic-intestinal function of mice were evaluated based on the feeding weight, the alimental using coefficient, the defecating weight, the first defecating time, the moisture of the dejecta, the alvine advancing rate. The results showed the feeding weight and weight of mice fed by high and middle concentrations of Lily DF were significantly increased compared with controlpO.

本实验以麝香百合渣、卷丹渣和麝香百合膳食纤维为原料，探讨不同品种和加工方法对其功能的影响，将其分别配制成1.6g/kg、7.8g/kg重、15.6g/kg体重三个浓度，同时设空白对照组和模型对照组，以白鼠为实验对象，其结果如下： DF对小白鼠胃肠道功能的影响：以小鼠进食量、食物利用系数、排便质量、粪便含水量、首次排便时间、小肠推进率以及重量为实验指标，对小鼠进行改善胃肠道的功能评价。

This paper puts forward an experimental model with the first-order response surface method and the design of experiments to study the impact of factors on dynamic performance of PEMFC. These factors include clamping pressure, fuel gas pressure and flux. The model is finally validated by volt-ampere experiments.

本文通过正交实验设计，利用一阶响应面法得到各因素对电池性能影响的实验模型，综合考虑了装配压力、燃料气体压力和流量对自增湿、自呼吸型PEMFC动态性能的影响，并结合伏-安特性实验进行了验证。

Comparison of four annona cultivars;2. Advances in the Studies on Postharvest Physiology and Fresh-keeping Methods of Annona Fruits;3. Plants of Annonaceae and their chemical components have very s.

番荔枝科植物及其化学成分具有很好的抗肿瘤作用，体外实验研究显示强大抑瘤效果，而体内实验不多，为此以番荔枝总提取物进行了防治肝癌的整体动物实验。

The test bedstand which is composed of electro-motor ,hydraulic pump ,hydraulic motor ,speed verily box and parallel compensating pump, can resolve the problem of power consumption and the power warm while large power hydraulic pump and motor testing.the principle of system is that electro-motor drive the hydraulic pump first,then the pump make the hydraulic motor work through its high pression oil,the follow working hydraulic motor feedback the power in niuju re-drive the hydraulic pump,at last the power is recovered.this bedstand make use of bishi hydraulic system ,which can have a closely construct ,and steadly chuandong ,lower noise ,high power recovery percentage and so on.

本实验台由电动机、油泵、油马达和变速箱以及并联补油泵等一起构成功率反馈实验油路，以解决大功率液压泵及马达在试验时的大功率消耗和能量耗散时的发热问题。实验台由电动机带动油泵，油泵输出油液驱动液压马达，油马达输出的扭矩通过变速箱传动回馈给液压泵的输入轴，从而实现功率回收。采用闭式液压系统，结构紧凑、运行平稳、噪声低、功率回收率高；机械补偿，电动机输入扭矩经变速箱传动驱动液压泵；液压补偿，并联补油泵对系统的高压油路进行流量补偿。

The test bedstand which is composed of electro-motor hydraulic pump hydraulic motor speed verily box and parallel compensating pump can resolve the problem of power consumption and the power warm while large power hydraulic pump and motor testing.the principle of system is that electro-motor drive the hydraulic pump firstthen the pump make the hydraulic motor work through its high pression oilthe follow working hydraulic motor feedback the power in niuju re-drive the hydraulic pumpat last the power is recovered.this bedstand make use of bishi hydraulic system which can have a closely construct and steadly chuandong lower noise high power recovery percentage and so on.

本实验台由电动机、油泵、油马达和变速箱以及并联补油泵等一起构成功率反馈实验油路，以解决大功率液压泵及马达在试验时的大功率消耗和能量耗散时的发热问题。实验台由电动机带动油泵，油泵输出油液驱动液压马达，油马达输出的扭矩通过变速箱传动回馈给液压泵的输入轴，从而实现功率回收。采用闭式液压系统，结构紧凑、运行平稳、噪声低、功率回收率高；机械补偿，电动机输入扭矩经变速箱传动驱动液压泵；液压补偿，并联补油泵对系统的高压油路进行流量补偿。

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