针对结构动力失稳的判定问题，提出了一种适用于杆系结构动力稳定分析的应力变化率法。
Considering the judgment of dynamic instability of truss structures, a stress rate method for dynamic instability analysis of truss structures was proposed.
运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。
The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.
在考虑储集层应力敏感影响的情况下，推导出新的产能方程，计算了渗透率变化对单井产能的影响。
Considering effect of stress sensitivity, it derives new productivity equation, and calculates effect of permeability change on single well productivity.
目的：探讨氧化锆梯度复合羟基磷灰石内固定材料的应力遮挡率的变化。
Objective: To approach the change of stress shielding rate of internal fixation materials made of nano zirconia gradient compounded with hydroxyapatite.
通过对板岩试样进行泡水试验及膨胀试验，建立起板岩在吸水后吸水率、膨胀应力及膨胀变形随时间的变化规律；
Variation law of water absorption, dilation stress and dilation deformation with time were get from the water-absorption and dilation experiments.
但单向连续碳纤复合材料的纵向电阻率随应力的增加变化不大。
But the electric resistivity changed little when the tensile stress changed for the resin composites filled with single direction continual carbon fibers.
基于渗透率随压力呈指数变化规律，建立了任意形状应力敏感性双重介质油藏不稳定渗流的数学模型。
Based on the law of permeability changing with pressure, a mathematical model is established for unsteady percolation in dual-porosity reservoirs with arbitrary shape of stress sensitivity.
不同的应力、温度组合条件下，渗透率的变化机制不同。
Under different combinations of the stress and temperature, there are different changing mechanisms of permeability.
示例分析说明，本模型可用于研究应力、应变、孔隙度和渗透率的动态变化规律以及可能对生产造成的影响。
Analyzed by an example, it is shown that the parameters of stress, strain, porosity and permeability change with time and space.
用热重分析仪 （TGA）和动态应力流变仪 （DSR）分别测量了聚硫醚酰亚胺热聚合反应过程中转化率和粘度随时间的变化。
Thermogravimetry analysis(TGA) and Dynamic Stress Rheometer(DSR) were used to measure the conversion and viscosity changing with time during the thermopolymerization to form polythioetherimides.
薄膜应力和折射率的改变主要是由于Y2O3含量的改变使得薄膜结构发生了变化引起的。
Moreover, the variations of residual stress and the shifts of refractive index correspond to the evolution of structures induced by the addition of Y2O3.
水平各向同性土层，在应力作用下，不同方向电阻率变化不同，呈现出方向性。
For horizontally isotropic soil layers, resistivity changes due to stress variation exhibit directivity, that is, the changes measured along different profiles are not identical.
沉积物的颗粒组成、结构、密度、含水率等决定了冲刷率与剪应力的变化关系。
The relationship between erosion rates and shear stress was determined by the particle composition, structure, wet density and water content of the sediment.
根据螺栓的轴向应力与超声波传播时间变化率的关系，作者研究了一种可直接测量螺栓轴向应力的仪器。
On the basis of relationship between bolt axial stress and rate of change in ultrasonic wave transmission time, the author has developed a device to directly measure axial stress in bolts.
国内外关于注水对地层渗透率影响的研究主要集中在应力变化上，对注水温度效应的研究非常少。
There is more attention on pressure change of water injection to the permeability of layer at home and abroad, but a little research on the temperature influence.
储层岩石渗透率受应力变化而减小的现象称为储层岩石的应力敏感性。
The phenomenon of the decrease in reservoir rock permeability owing to the change in stress is called reservoir rock stress sensitivity.
重点讨论了建立湿度应力场理论的两大要素：膨胀岩石含水率变化对其力学性质的影响和岩体中湿度变化规律。
Two basic problems, which are change of mechanical properties of swelling rock by effects of water content and the humidity field swelling rock mass, are discussed.
研究了连续碳纤维单丝的应变电阻效应，分析了在拉应力作用下其电阻率的变化规律。
The effect of tensile strain on electrical resistance of continuous carbon fiber monofilament was investigated in this paper.
油藏岩石的渗透率随应力变化的性质为岩石的应力敏感性。
Permeability of rock will change with the stress applied on, which is called the stress sensitivity of reservoir rocks.
在此基础上，分析渗透率模量变化对气藏压力和产量的影响，分析应力敏感性高压气藏井流入动态。
Then, the influence of the permeability modulus on the pressure and production of gas reservoirs and the inflow performance of stress-sensitive gas Wells with high pressure are analyzed.
定义了渗透率的应力敏感系数，在应力敏感系数的基础上，建立了渗透率随有效应力的变化关系式，为建立应力敏感性油气藏渗流模型奠定了基础。
By this method, core permeability in reservoir condition can be calculated conveniently, which provides a basis to establish percolation model of stress sensitivity oil and gas reservoir.
声发射事件率在不同应力水平变化很大，峰值强度后的声发射现象仍然明显，其声发射特征随岩样破坏形式的不同而不同。
The AE rates change dramatically in different stages. In post-peak region, AE events stay evident and the AE characteristics depend on the failure type of rocks.
分析了应力变化对人为差错率的影响 ，研究了变应力条件下人为差错率、人为差错前平均时间及人的工效可靠度三者间的关系 。
This article analyzes reliable factors which influence people, puts forward the means and measures that can improve peoples reliability and reduce the man-made errors.
分析了应力变化对人为差错率的影响 ，研究了变应力条件下人为差错率、人为差错前平均时间及人的工效可靠度三者间的关系 。
This article analyzes reliable factors which influence people, puts forward the means and measures that can improve peoples reliability and reduce the man-made errors.
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