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In order to fully refect the geo-tech basic mechanics behaviors and to rationally explain the strain localization, this paper establishes the theory framework of gradient-dependent plastic model based on the theory framework of gradient-dependent plastic mechanics and in considering the plastic strain's gradient-dependence in double yield function, offers a kind of possible concrete pattern of the generalized plas...

为了较全面地反映岩土的基本力学性质，同时合理解释应变局部化现象，本文基于广义塑性力学的理论框架，在双重屈服函数中考虑了塑性应变的梯度依赖，建立了广义塑性梯度模型的理论框架，并给出了广义塑性梯度模型的一种可能的具体形式，分析了该模型的各个模型参数，尤其是其中的&局部化参数&的物理意义和可能对其产生影响的因素。

The model could also explain the changing regularity of stress, the cause of generation of residual stress during drying and the relievable effect of viscoelastic strain and mechano-sorptive strain on drying stress.

模型验证实验表明，本文提出的干燥应力模型可以准确描述木材干燥应力应变变化规律；但此干燥应力模型不能计算和解释调湿处理过程中的干燥应力。

In the extensional rheometric tests, the occurrence of phenomena of "strain hardening1relied on the structure of linear long chains, and mPE didn"t show the behavior of "strain hardening", which implied that the melt strength of mPE was poor.

通过研究发现，在n1PE中混入少量LDPE，不仅能够显著降低n1PE的熔体粘度，提高其熔体粘度对剪切速率的依赖性，而且还可以有效地提高mPE的熔体强度，使mPE熔体在拉伸流动中出现显著的&应变硬化&现象。

During the non-isothermal crystallization, compared with common PE, the cooling rate had less impact on the crystallization rate of mPE. Second, the sensitivity of the melt viscosity of mPE to the shear rate was poor, and the introduction of long chain branches onto the molecular structure of mPE could improve the dependence of their melt viscosity on both shear rate and temperature. In the extensional rheometric tests, the occurrence of phenomena of'strain hardening' relied on the structure of linear long chains, and mPE didn't show the behavior of'strain hardening', which implied that the melt strength ofmPE was poor.

其中通过共聚方法在mPE分子中引入非线性长支链结构，对提高mPE熔体粘度对温度的依赖性作用较为明显，而对提高mPE熔体粘度对剪切速率的依赖性以及对提高mPE熔体强度作用较弱；采用共混方法在mPE体系中引入线性长支链结构，则对提高mPE熔体粘度对剪切速率的依赖性以及提高mPE的熔体强度的作用较为明显，而对于提高mPE熔体粘度对温度的依赖性作用相对较弱。

Under triaxial compressive conditions, with an increase of loading, the propagation and sliding of microcracks in rocklike materials become increasingly intense and lead to a serial of consequences, such as nonlinear stress-strain relationships, deterioration of elastic modulus, anisotropic deformation, volumetric dilatancy and irreversible plastic strain, etc..

三维压缩条件下，随着载荷的逐渐增加，岩石类材料内部微裂纹的传播与错动不断加剧，最终导致非线性应力－应变关系、弹性模量的减小、变形的各向异性、体积膨胀以及不可逆塑性变形等结果。

With routine method, from having elected contents higher one RNA bacterial strain among several saccharomycetes, beer yeast, and the method with Shan factor experiment have studied an experiment being bacterial strain's turn to produce more proper RNA culture medium made up of , optimum the pH value fermenting and the best fermentation time.

本实验用常规方法从数株酵母菌中选出了一株RNA含量较高的菌株——啤酒酵母，并用单因素实验的方法研究了该菌株产RNA较适宜的培养基组成、最佳发酵pH值和最佳发酵时间。

Methods The H gene was amplified and cloned from the passages of MeV23,MeV26,MeV27, MeV29,MeV32 and MeV37 of the attenuated strain of MeV vaccine strain S191 by reverse tran- scription potymerase chain reaction.

方法利用逆转录—聚合酶链反应方法扩增S191减毒株MeV23、MeV26、MeV27、MeV29、MeV32和MeV37代H基因，测序后与GenBank上U03663的序列进行比对分析。

The strain carrying pLEB590 was shown to be able to grow in medium containing a maximum of 550 IU Nisin/ml, and the host strain could maintain the segregational stability of pLEB590 under selective conditions.

携带载体pLEB590的菌株可以耐受最大为550 IU /ml 的Nisin浓度，并且在Nisin选择压力下能够保持外源质粒的遗传稳定性。

In terms of linear strain assumption and the ten- sile strain development of CFRP at the tension side of bending section, the efficiency for CFRP used to strength- en the moment capacity of bending section is studied.

在应变平截面假定的基础上，本文借助分析承载能力极限状态下受拉区碳纤维片材拉应变的发展规律，研究了碳纤维片材用于受弯构件正截面加固的有效性。

Objective: To investigate the mode of cell death caused by NDV-strain Changchun and NDV strain Siping.

目的：研究NDV长春株和四平株致细胞死亡的方式。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。