查询词典 breech-loading

The test means of cyclic loading between the set constant of strain seem to be more reasonable for low cycle fatigue with large strain.

对高应变状态下的低周疲劳，采用在设定的应变界限之间重复受力的试验方法似乎更加合理。

The fatigue tests of concrete on biaxial tension-compression under constant -amplitude cyclic loading with constant confined stress are described in this part of the thesis.

总结了混凝土边界面模型发展的历史及其基本概念，分析了混凝土边界面模型构建的一般方法。

In the research of high cycle fatigue of concrete, the test means of cyclic loading between the set constant or various upper limit and low limit of force or stress has been extensively used. But this kind of test means can't be used to study the behavior of concrete low cycle fatigue under large strain.

同时高周疲劳问题研究中使用的在设定的力或应力的上下界限之间重复受力的试验方法已无法用于混凝土高应变低周疲劳性能的试验研究。

It was found that the low cycle fatigue character has close internal relations with the high cycle fatigue character. In the research of high cycle fatigue of concrete, the test means of cyclic loading between the set constant of force or stress has been extensively used. But this kind of test means can't be used in studying the behavior of concrete low cycle fatigue under large strain.

在研究中发现低周疲劳特征与高周疲劳特征有着密切的内在联系，但高周疲劳问题研究中使用的是在设定的力或应力的上下界限之间重复受力的试验方法，这种方法已无法用于混凝土高应变低周疲劳性能的试验研究。

Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years.

飞机结构日历寿命的确定与腐蚀环境对飞机结构寿命的影响紧密相连，材料抗疲劳性能随日历年限的变化规律和腐蚀环境作用后的疲劳累积损伤理论是科学地确定飞机结构日历寿命的基础。

The deformation characteristics of granite under constant amplitude cyclic loading were studied with multi-function apparatus RMT-150B.

摘 要：利用RMT-150B岩石力学多功能试验机，对花岗岩进行常幅循环加载试验，研究循环加载过程中岩石的变形特性。

This study consists of three parts. Firstly the equivalently accelerative corrosive environment is determined through the analysis of statistic data of corrosion environment. Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years. Four S-N curves with different corrosive time are obtained based on the fatigue experiment. Finally the regression method of S-N curves for experimental data is researched and a weighted least square fit is put forward in which the weigh of a group of test data is inversely proportional to the length of the confidence interval.

进行了以下几个方面的工作：(1)通过实测、统计、分析得到了当量加速环境谱；(2)完成了在当量加速环境谱下预腐蚀日历年限0年、3年、8年和13年的腐蚀试验，并进行了成组常幅疲劳试验，得到了不同预腐蚀年限下的S-N曲线；(3)进行预腐蚀后的S-N曲线的数据拟合方法的研究，提出了考虑置信区间长度影响的加权最小二乘法。

The research adds a successful explorative achievement for application of strut-tie model on the statically indeterminate and low cyclic loading condition in which field academic circles has just begun to study over the world.

这项研究为各国学术界刚刚起步的将拉杆-压杆模型用于超静定及低周交变条件的努力添加了一项成功的探索性成果。

Following results have been obtained: a novel method of surface modification of transparent silicon rubber with plasma to adapt it to cell adherence and spread was developed, and a set of elastic matrix cell culture devices based on the method was developed; it is found that MSCs oriented 90 degrees to the applied cyclic strain field and aligned, the reaction of MSCs to the cyclic stretch is related to the loading regimen and aging of MSCs, cyclic strain may lead to differentiation of MSCs.

主要研究结果有：研究出利用等离子体对硅胶进行表面改性以利于细胞粘附和铺展的新方法，并基于此研制出了可动态加载的应变均匀的新型弹性基底细胞培养装置。发现MSC在受到交变拉伸加载后沿与受力垂直的方向排列的现象，该现象与加载的条件和MSC的老化程度有关，交变拉伸加载可能有促进MSC分化的趋势。

1 Which of the following is not a recommended method of cyclic loading improvement ?

下列哪个方法在周期载荷结构的补强和修理时不推荐使用？

There are two types of gold deposits in this area, namely altered rock type and quartz vein type.

本区金矿床包括两种类型：柴胡栏子金矿床为蚀变岩型金矿；莲花山和红花沟金矿床属石英脉型。

You were home and it was two weeks ago.

你回到了家里。当时是两周前。