The conception of principal direction Gaussian image (PDGI) is created.
提出了基于主方向高斯映射的概念和定义。
Precision estimation of principal direction is more objective by using principal stress deflection error proposed in this paper.
提出了主应力的偏角误差概念及其计算方法，使主应力方向的精度评定更加真实客观。
The method of determining earthquake input principal direction are studied, which is used for seismic analysis of irregular bridges.
讨论了不规则桥梁地震反应分析中地震动输入主方向的问题。
Principal directions of a rotational surface were mapped to Gaussian sphere in the algorithm, and principal direction Gaussian image(PDGI) was generated.
该算法对旋转面主方向映射到高斯球面，生成主方向高斯图像（PDGI）。
In the graphical method of the oblique axonometry, the affine transformation is taken as the ellipse's principal direction and the size of the principal radius.
在斜轴测的图解法中，用仿射变换作椭圆的主方向和主半径大小。
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。
Provide direction to Engineer to design schematic diagram. Principal Engineer may also require designing circuit at components level.
为工程师绘制设计示意图提供指导。必要时在小组阶段进行线路设计。
With proper design, the grain flow can be oriented in the direction of principal stresses encountered in actual use.
通过适当的设计，可以使晶粒流动方向与实际使用时的主应力方向一致。
The principal chess piece, which can move one square in any direction and must be protected against checkmate.
王象棋中主要的棋子，可以向任何方向移动一个方格，但必须保护它不被将死。
The theoretical result shows that the direction of plastic strain increment is determined by the direction of principal stress and stress increment.
从理论上说明塑性应变增量的方向不仅与应力的主方向有关，还与应力增量的方向有关。
An equation for the calculation of true shear strain was derived from the integration of infinitesimal shear strain in plane shearing process with constant principal shear strain direction.
对切应变主轴不变的平面简单切变过程，通过无穷小应变的积分，导出了真实切应变计算公式。
The controlled reserves and productivity of a horizontal well were determined by the wellbore direction, the principal values of main direction and permeability of the anisotropic reservoir.
结果表明，水平井的控制储量和产能由水平井方位、各向异性渗透率主值及主方向共同决定。
The results show that vertical stress is equal to overburden stress at shallow level. Maximum principal stress is sub horizontal stress in the NE direction.
结果表明：显德汪煤矿垂直应力近似等于上覆岩层的自重应力，最大主应力为北东方向，且为近水平压应力。
For Z direction, the principal periods are annual, semi-annual, 51-day and 609-day periods.
方向的主周期是年周期变化、半年周期变化、51天和609天的周期变化。
This paper introduces a new way for defining the maximum principal strain direction in plane strain condition.
本文介绍了一种确定平面应变中最大主应变方向的新方法。
The fault movement and the direction of principal stresses may be determined by considering the relationship between the different secondary structures and en-echelon patterns.
因此可以通过这些次级构造和雁列类型的关系，来判断断层的运动和主应力方向。
The result shows that the deformation of platform makes the change on the direction of inertia principal axes which results in an error on the attitude precision.
结果表明由于平台变形使主惯性轴方向变化从而使气浮台姿态准确度产生误差。
In the article, a simple method is discussed to confirm the principal stress direction un-den the plane stress condition.
文章给出了一种判断平面应力状态主应力方向的简便方法。
While direction of previous main faults that intersect the maximum principal stress by minor Angle also probably becomes the major migration direction of oil and gas.
与最大主应力小角度相交的先期主要断裂的方向也可能成为油气运移的主要方向。
Keeping the minor principal stress and medium principal stress fixed, the loading in the direction of the major principal stress is a potential stress path in practical projects.
保持小主应力、中主应力不变，在大主应力方向加荷是实际工程中可能存在的一种应力路径。
The influences of the Angle of internal friction, the Angle of wall friction to the direction of principal strain rate are analyzed.
分析了内摩擦角、壁面摩擦角对最大主应变率方向的影响。
The results show that: with the initial principal stress direction angle increases, the axial residual deformation from the compression state gradually transits to the elongation.
结果表明：随着初始主应力方向角的增大，轴向残余变形由压缩状态的正值逐渐过渡到伸长状态的负值。
The direction of the major principal stress in a region remains the same from tens of meters to 4000 meters below surface.
一个地区的主压应力方向在地下几十米至4000米大体是一致的。
The result shows that the principal compressional stress field is in the SW NE direction.
结果表明，该区域应力场主压应力方向为SW- NE向。
Recent tectonic stress field is entirely dominated by the principal compressive stress with the components, whose orientation is in level, approximate level or sideling direction.
该带现今以水平、近于水平兼有一定斜向作用的主压应力为主。
It is pointed out that the principal compressive stress direction of tectonic stress field in the area is nearly s - n.
指出，该区构造应力场的主压应力方向为近南北向。
Results show that the displacement in horizontal direction and the maximum principal stress of core wall will increase to a larger extent if the creep effect of asphalt concrete is considered.
分析结果表明，考虑蠕变效应，心墙的水平变形与最大主应力将有较大的增加。
The principal, component and performance of this kind of sensors are demonstrated, also some existent problems and the research direction in future are discussed.
对其原理、组成和性能进行了评述，并讨论了一些存在的问题和今后的研究方向。
The numerical results show that the extremum direction of shear waves coincides with the direction of far-field principal stress. Furthermore, we verify the validity condition of the simplified model.
数值结果表明横波波速的极值方向与岩石远场应力的方向相一致，指出了简化模型的适用条件。
The numerical results show that the extremum direction of shear waves coincides with the direction of far-field principal stress. Furthermore, we verify the validity condition of the simplified model.
数值结果表明横波波速的极值方向与岩石远场应力的方向相一致，指出了简化模型的适用条件。
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