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• The conception of principal direction Gaussian image (PDGI) is created.

提出了基于方向高斯映射概念和定义。

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• Precision estimation of principal direction is more objective by using principal stress deflection error proposed in this paper.

提出应力偏角误差概念及其计算方法，使主应力方向精度评定更加真实客观

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• 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方向问题。

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• Principal directions of a rotational surface were mapped to Gaussian sphere in the algorithm, and principal direction Gaussian image(PDGI) was generated.

算法旋转方向映射高斯球面，生成主方向高斯图像PDGI）。

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• 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.

轴测图解中，仿射变换作椭圆方向主半径大小

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• 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.

结构试验采集得到的成百上千个任意角度应变花的读数，可用本文编写计算机程序确定应变方向，从而替代了科研人员大量手工计算。

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• Provide direction to Engineer to design schematic diagram. Principal Engineer may also require designing circuit at components level.

工程师绘制设计示意图提供指导必要小组阶段进行线路设计

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• 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实际使用应力方向一致。

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• The maximUm difference of failure strength among various principal stress direction is up to 30%.

不同应力方向破坏强度最大差别可达30%。

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• The principal chess piece, which can move one square in any direction and must be protected against checkmate.

象棋中主要的棋子，可以任何方向移动一个方格，但必须保护它不被将死。

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• The theoretical result shows that the direction of plastic strain increment is determined by the direction of principal stress and stress increment.

理论上说明塑性应变增量方向不仅应力方向有关，还与应力增量的方向有关。

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• 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.

应变主轴不变平面简单切变过程通过无穷小应变积分，导出真实切应变计算公式

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• 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，水平井的控制储量产能水平井方位、各向异性渗透率方向共同决定

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• 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岩层的自重应力，最大应力为方向，且水平压应力。

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• For Z direction, the principal periods are annual, semi-annual, 51-day and 609-day periods.

方向周期是年周期变化、半年周期变化、51天和609的周期变化。

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• 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最大应变方向方法

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• 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类型关系，来判断断层的运动应力方向

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• 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惯性方向变化从而使气浮台姿态准确度产生误差

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• 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应力方向的简便方法

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• 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.

最大应力角度相交的先期主要断裂方向可能成为油气运移主要方向。

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• 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.

保持应力主应力不变主应力方向实际工程可能存在一种应力路径

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• The influences of the Angle of internal friction, the Angle of wall friction to the direction of principal strain rate are analyzed.

分析内摩擦壁面摩擦角对最大主应变方向影响

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• 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.

结果表明随着初始应力方向增大轴向残余变形压缩状态的正值逐渐过渡伸长状态的负值。

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• The direction of the major principal stress in a region remains the same from tens of meters to 4000 meters below surface.

一个地区压应力方向地下几十至4000米大体是一致的。

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• The result shows that the principal compressional stress field is in the SW NE direction.

结果表明区域应力场主应力方向为SW- NE向

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• 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.

该带现今水平近于水平兼有一定斜向作用的应力为主

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• 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应力方向南北向

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• 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水平变形最大应力较大增加

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• The principal, component and performance of this kind of sensors are demonstrated, also some existent problems and the research direction in future are discussed.

原理、组成性能进行了评述讨论了一些存在问题今后研究方向

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• The principal, component and performance of this kind of sensors are demonstrated, also some existent problems and the research direction in future are discussed.

原理、组成性能进行了评述讨论了一些存在问题今后研究方向

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