试验的

The fracture toughness testing technique for the central cracked circular disk specimen is given to investigate the fracture behavior of brittle material polymethyl methacrylate under pure mode Ⅰ, pure mode Ⅱ and mixed-mode loadings. The experimental results show that the load distribution angle is always greater than 8° for all different loading conditions.

给出一个中心裂纹圆盘断裂试验的较完整的试验技术，并用此试验技术在岛津材料试验机上对有机玻璃(polymethyl methacrylate， PMMA)这种典型的脆性材料成功地进行纯Ⅰ型、纯Ⅱ型和复合型加载条件下的断裂试验。

The results show that the test method is feasible and convenient on restriction of experimental conditions.

以镇胜公路平寨特大桥挂篮荷载试验为例，论述了采用等代千斤顶荷载进行挂篮预压试验的方案确定和结果分析，试验表明由于受试验条件限制采用此方法进行挂篮预压试验是方便可行的。

If the results of randomized trials unlimited uncountable results and the likelihood of each uniform, in the sample space every incident can use a basic one to describe bounded region, said the random tests for the geometric probability.

如果一个试验在相同条件下可以重复进行，而每次试验的可能结果不止一个，但在进行一次试验之前却不能断言它出现哪个结果，则称这种试验为随机试验 2。

Objective:To revaluate the diagnostic tests for keratoconjunctivitis sicca in primary Sjogren' s syndrome in China.

目的：在我国患者中重新评价原发性干燥综合征眼科诊断试验的临床价值。方法：用Schirmer试验、BUT试验和角膜荧光素活体染色试验。

There are some characteristics for reliability growth test evaluation of liquid rocket engine, such as its field test data is small sample, there are multi-kind stresses act on the system during accelerated life test, its life test data belongs to a dynamic parent population.

液体火箭发动机可靠性增长试验的特点有：系统现场试验为小子样、加速寿命试验中存在多种应力综合作用、可靠性增长试验数据属于动态统计母体。

This paper describes briefly the experimental results of resistance tests,pro- peller open water tests and self-propulsion tests of five geometrically similar models of a 24,000 DWT oil tanker.

本文简要介绍上海交通大学船模试验池对于24000吨油轮五艘几何相似船模的阻力试验、敞水试验及自航试验的结果，根据试验结果分析得出的下列结论可供今后船模试验研究参考之用。1。

Results Positive rate of Amsel was 28%, one step sialidase was 34%, Gram-stain was 30% and amines was 24%. Using Amsel as criterion, the sensitivity of one step sialidase and amines was 92.9% and 71.4%; specificity was 88.9% and 94.4%; positive predictive value was 76.5% and 83.3% negative predictive value was 97% and 89.5%, using Gram-stain method as criterion, the sensitivity of one step sialidase and amines was 93.8% and 66.7%, specificity was 92.1% and 94.3%, positive predictive value was 83.3% and 83.3%, negative predictive value was 97.2% and 86.8% respectively.

Amsel法阳性率28%，组织多胺试验阳性率24%，一步法唾液酸酶活性的检测试验阳性率34%，革兰染色细菌评分法阳性率30%；唾液酸酶活性检测法与Amsel法，革兰染色细菌评分法相比较差异无显著性；组织多胺试验与Amsel法，革兰染色细菌评分法相比较差异无显著性；以Amsel法为标准，一步法唾液酸酶活性检测法和组织多胺试验的灵敏度分别为92.9%和71.4%，特异性分别为88.9%和94.4%，阳性预期值分别为76.5%和83.3%，阴性预期值分别为97.0%和89.5%；以革兰染色细菌评分法为标准，一步法唾液酸酶活性检测法和组织多胺试验的灵敏度分别为93.8%和66.7%，特异性分别为92.1%和94.3%，阳性预期值都为83.3%，阴性预期值分别为97.2%和86.8%。

As showed in Fig.1, the diagrammed stress of short time endurance test forAs showed in Fig.1, the diagrammed stress of short time endurance test for500 hours at 565℃on welded-joint of T91-F12 is 240MPa. Considering the℃on welded-joint of T91-F12 is 240MPa. Considering thedispersity of±20％, stress of check test for 500 hours is 192MPa. The result±20％, stress of check test for 500 hours is 192MPa. The resultof short time endurance test for 500 hours at 565of short time endurance test for 500 hours at 565℃on T91-X20CrMoV121℃on T91-X20CrMoV121welded-joints is showed in Tab.5. The result shows that the short timewelded-joints is showed in Tab.5. The result shows that the short timeendurance stress of weldedendurance stress of welded-joints with two procedures at 565℃for 500 hours-joints with two procedures at 565℃for 500 hoursboth above 192MPa, and meet the requirement.both above 192MPa, and meet the requirement.

依据图1，对T91－F12 焊接接头 565℃温度下的短时持久性能 500 小时考核试验依据图1，对T91－F12 焊接接头 565℃温度下的短时持久性能 500 小时考核试验的图示应力值应为 240MPa，按照持久强度试验数据的±20％的分散度，取 500的图示应力值应为 240MPa，按照持久强度试验数据的±20％的分散度，取 500小时考核试验应力值为 192MPa.T91－X20CrMoV121 焊接接头 565℃、500 小时小时考核试验应力值为 192MPa.T91－X20CrMoV121 焊接接头 565℃、500 小时短时持久考核试验试验结果见表5 ，试验结果表明，两种工艺条件下的焊接接头短时持久考核试验试验结果见表5 ，试验结果表明，两种工艺条件下的焊接接头565℃温度下的短时持久性能，500 小时的持久断裂应力均高于 192MPa，结果符565℃温度下的短时持久性能，500 小时的持久断裂应力均高于 192MPa，结果符合要求。

According to concrete conditions of the wing flap retraction-extension system of the 18 trainer aircraft, this paper ca nes out a research into the relibility demonstration test and the life test plans of the system, and deals with some key issues related to the test in a deep manner, such as relation between the reliability test parameters and the reliability indexes, converting from working time, composite test profiles, the mathod determining reliability test parameters for success ratio and so on.

本文针本对L8机襟翼收放系统的具体情况，研究了其可靠性验证试验和寿命试验方案，并深入研究了涉及试验的关键问题，例如：可靠性试验参数与可靠性指标之间的关系，工作时间与工作次数的折算，合成试验剖面，确定成败型可靠性试验参数的方法等等。

Moreover,it describles the advantages of using voltage series resonance method on GIS in site,and thus the performance of field testing de- vice developed by Guangdong Electric Power Research Institute and the test effect.

本文简要地叔述了 GIS 在现场安装后，进行耐压试验的必要性，耐压试验电压波形的选泽、标准及试验程序，并介绍了用串联谐振方法进行 GIS 现场耐压试验的优点，以及广东电力试验研究所研制成功的 GIS 现场耐压装置的性能和试验效果

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。