查询词典 strain

On the basis of the data obtained from Cam Plastometer,an RBF neural network prediction model is established by Matlab neural network toolbox,which corresponds with the relationship between flow stress and chemistry elements,temperature,deformation strain and strain rate of carbon steel.

以凸轮式高速形变试验机得到的实验数据为基础，利用Matlab人工神经网络工具箱，建立了碳钢的变形抗力与其化学成分、变形温度、变形程度及变形速度对应关系的RBF神经网络预测模型。

On the basis of the data obtained from the cam-type plastometer, four prediction models including the BP, Elman, RBF and GRNN neural network prediction models were established, which corresponded to the relationship between the deformation stress of nickel-chrome steel with chemistry elements, temperature, strain rate and deformation strain of the steel respectively. A comparative analysis for the prediction accuracy of the four models was obtained.

以凸轮式高速形变试验机进行的热模拟压缩实验得到的实验数据为基础，建立了热轧铬镍钢的变形阻力与其化学成分、变形温度、变形速度及变形程度对应关系的BP、Elman、RBF和GRNN 4种神经网络预测模型；并对4种网络的训练过程和预测精度进行比较分析。

Poisson's Ratio—Ratio of lateral strain to axial strain in an axial loaded specimen.

泊松比—轴向负荷下试样侧向应变对轴向应变的比率，与刚性模量和杨氏模量有关

Transgenic tobacco plants were obtained through screening with kanamycin. The transgenic tobacco plants could delay TMV infection for about 25 days compared with non-transgenic tobacco plants. Pokeweed antiviral protein Ⅱ is expressed with high level in summer leaves. The expression of PAPⅡ is regulated by season. The total RNA was extracted from pokeweed (Phytolacca americana L.) leaves in summer using the method of TRIzol and used as template to amplify the PAPⅡ gene by RT-PCR and then the gene was cloned into E. coli expression vector and secreted expression pPIC9K vector. The two vectors with PAPⅡ gene were then transferred into E. coli strain BL21 (DE3)-plysS and Pachia pastoris GS115 strain respectively. The specific protein was produced induced by IPTG and methanol.

由于美洲商陆抗病毒蛋白Ⅱ是一个受季节调控表达的蛋白，本实验以美洲商陆夏季叶片为材料，通过对其总RNA的提取、反转录、并用PAPⅡ的特异引物进行PCR扩增，对PAPⅡ进行了基因克隆、序列分析，结果扩增出来的PAPⅡ基因与已经报道的序列同源性是99.9％，然后将该基因构建到原核、真核表达载体上，分别转化了大肠杆菌和毕赤酵母并对它们进行了诱导表达，在两个表达系统中均获得了有活性的PAPⅡ表达蛋白，体外生物测定表明表达的蛋白均具有抑制病毒的活性，PAPⅡ基因在酵母中还没有表达的报道，这为获得具活性PAPⅡ蛋白提供了一种简便可行的方法。

The transgenic tobacco plants could delay TMV infection for about 25 days compared with non-transgenic tobacco plants.Pokeweed antiviral protein II is expressed with high level in summer leaves. The expression of PAPII is regulated by season. The total RNA was extracted from pokeweed (Phytolacca americana L.) leaves in summer using the method of TRIzol and used as template to amplify the PAPII gene by RT-PCR and then the gene was cloned into E.coli expression vector and secreted expression pPIC9K vector. The two vectors with PAPII gene were then transferred into E.coli strain BL21 (DE3)-plysS and Pachia pastor is GS115 strain respectively. The specific protein was produced induced by IPTG and methanol.

由于美洲商陆抗病毒蛋白Ⅱ是一个受季节调控表达的蛋白，本实验以美洲商陆夏季叶片为材料，通过对其总RNA的提取、反转录、并用PAPⅡ的特异引物进行PCR扩增，对PAPⅡ进行了基因克隆、序列分析，结果扩增出来的PAPⅡ基因与已经报道的序列同源性是99.9％，然后将该基因构建到原核、真核表达载体上，分别转化了大肠杆菌和毕赤酵母并对它们进行了诱导表达，在两个表达系统中均获得了有活性的PAPⅡ表达蛋白，体外生物测定表明表达的蛋白均具有抑制病毒的活性，PAPⅡ基因在酵母中还没有表达的报道，这为获得具活性PAPⅡ蛋白提供了一种简便可行的方法。

The research was performed to select certain typical bacterial strain as the vaccine strain to produce polyvalent inactivity vaccine for the local prevention and counterchecking of the disease on the basis of the separation and identification of streptococcosis suis, in the southern part of Xinyang region of Henan Province.

本研究是在对信阳地区猪链球菌病病原分离、鉴定的基础上，挑选具有一定代表性的菌株作为疫苗株，研制多价灭活疫苗用于本地区该病的免疫防制。

Test results show that, with the addition of polyvinyl acetate, the compressive strength and compressive modulus of mortar decrease distinctly, but the ultimate strain increases significantly. The uniaxial tensile strength and bending strength increase a little, but the tensile peak-strain and the ratio of tensile-compressive and bending-compressive increase remarkably.

试验结果表明，随着聚醋酸乙烯的掺入，砂浆的轴压强度和弹性模量显著下降，但极限应变却明显增大；砂浆的轴拉强度和抗弯强度均略有提高，而极限应变、拉压强度比和弯压强度比则显著增加。

The plastic deformation induced due to cyclic rotation of principal stress axes alone can be in the same magnitude as that due to shear with fixed principal stress axes. 2 The volumetric strain due to shearing of cyclic rotation of principal stress axes is found to be composed of a reversible dilatancy component and an irreversible dilatancy component. The former is characterized by its reversibility and is independent of past shear history, the latter by its irreversibility increases with the increase of cycle number yet its increase rate decreases with its accumulation. 3 The obvious non-coaxiality between directions of the principal stresses and principal strain increments is found and its degree depends largely on the change of shear stress component. 4 The intermediate principal stress has considerable effects on the deformation behavior of sands in the condition of cyclic rotation of principal stress axes. The accumulation rate of the irreversible dilatancy component increases with the increase of the intermediate principal stress parameter.

具有初始各向异性的砂土在纯应力主轴循环旋转排水条件下的主要变形规律为：①纯应力主轴循环旋转可产生与应力主轴固定单调剪切处于同一数量级的塑性变形；②纯应力主轴循环旋转引起的剪切体变包含可逆性剪切体变分量和不可逆性剪切体变分量两部分，其中可逆性剪切体变分量在一周内可完全恢复，基本与应力历史无关；不可逆性剪切体变分量随循环周数的增加呈单调增加，且增加速率随其自身累积值的增大呈减小趋势；③应变增量主轴与应力主轴之间的非共轴现象显著，且在一周内具有分段性；④中主应力对应力主轴循环旋转条件下砂土的变形特性有重要影响，不可逆性剪切体变分量的累积速率随中主应力系数的增加而增加。

Principal stress in the direction of zero principal strain has significant effect on strength and deformation of soil in plane strain state.

零应变方向的主应力对平面应变状态下土的强度和变形均有重要影响，认识土的弹塑性特性是正确确定零应变方向主应力的前提。

A great quantity of any angle strain rosette readings was gathered in structural test, the principal strain and the principal direction were calculated by computer program written in this paper.

在结构试验中采集得到的成百上千个任意角度应变花的读数，可用本文编写的计算机程序确定其主应变及主方向，从而替代了科研人员大量的手工计算。

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。