In China ancient times in currency history, down to all the money copper steel turtle shell and so on, separately has acted as the currencies, but, looked from the entire currency history development's general trend, Song Yuan before the copper is the most main coin material, but after Song Yuan, the silver becomes the principal currency gradually, the copper cash and the silver coordinates.
在中国古代货币史上，举凡金银铜铁以至龟贝等等，都分别充当过货币，但是 dddTt ，从整个货币史发展的总趋势看，宋元以前铜是最主要的币材，而宋元以后 ssbbww ，白银逐步成为主要货币，铜钱与白银相辅而行。
Change of components of inertia tensors in rotation of coordinates and calculation of principal moment of inertia is particularly complicated. MOHR'S CIRCLE AND AXIS MOMENTS OF INERTIA, INERTIAL PRODUCT
其中惯性矩、惯性积的转轴公式以及主惯性轴和主惯性矩的计算尤为复杂，在教学过程中，是学生学习的难点内容之一.莫尔圆与轴转动惯量、惯性积
The first order and the second order principal coordinates of hydroelastic vibration of a moored floating body are calculated. The frequency characteristics of the principal coordinate are discussed.
计算了系泊浮体水弹性运动的一阶和二阶主坐标，重点讨论了主坐标的频率特征。
The magnitude of the range about the principal coordinates on elastic mode decides the contribution which every elastic mode makes to total distortion and the range of low frequency mode is much larger than it of high frequency mode.
弹性模态各主坐标幅值的大小决定着各弹性模态对总体变形的贡献，低频模态的主坐标幅值要比高频模态的大很多。
Thus realizing the calibration correction of the camera host, the coordinates of the principal point as well as the system error because of the lens distortion.
从而实现相机主距，像主点坐标以及因光学畸变等因素引起的系统误差改正数的检校改正。
Based on the second-order nonlinear hydroelasticity theory proposed in a previous paper, the frequency characteristics of the principal coordinates of a moored floating body are analyzed.
采用前文建立的海洋浮体二阶非线性水弹性理论，本文分析了一个弹性系泊浮体在波浪中的主坐标响应的频率特征。
The conventional ground survey taking goniometry, ranging and leveling as the principal part for a long time is gradually being replaced by GPS technology with one-time determination of 3-D coordinates, high-velocity, high-efficiency and high-precision.
长期以来用测角、测距、测水准为主体的常规地面测量，正在逐步被以一次性确定3维坐标的高速度、高效率、高精度的GPS技术所代替。
By use of principal directions and coordinates of center or apex of a quadric cure, a Descartes'orthogonal coordinate transformation formula such as the reduced equation of the cure is expressed in terms of its invariants and semi invariants.
利用二次曲线的主方向、中心或顶点坐标，给出了使得曲线的简化方程由其不变量和半不变量表示的直角坐标变换公式。
Combining the principal coordinates from the covariance analysis of the original pressure field and the new proper mode values above, the wind pressure time series on the location were acquired where the pressure taps are not distributed.
结构由原风压场协方差分析得到的主坐标和上述新本征模态值获得未布置测压点位置的风压时间序列。
Second Order Nonlinear Hydroelastic Analyses of Floating Bodies & Frequency Characteristics of the Principal Coordinates of a Moored Floating Body
海洋浮体二阶非线性水弹性力学分析&系泊浮体主坐标响应的频率特征
Based on these data, together with the input nodal coordinates and node-numbers of each element, the principal stress contour can be plotted automatically.
本方法就是以上述数据为基础，用计算机自动完成主应力等值线的绘制工作。
In this paper, a new conception of metric principal coordinates is proposed. A theorem of diagonalization, which transforms the curvilinear arbitrary coordinates to the metric principal coordinates, is derived and proved.
本文提出了度量主坐标的新概念，并证明导得了由任意曲线坐标系到度量主坐标系的相似变换定理。
The paper introduces the method and application procedure for the accurate measurement on highway cross-section by use of infrared ray instrument based on the principal of polar coordinates.
介绍一种根据极坐标原理和利用红外仪精确测量公路横断面的方法及实施步骤。
The result of the principal coordinates analysis is consistent with UPGMA clustering analysis.
再通过主坐标分析，结果也与UPGMA聚类结果基本一致。
The UPGMA cluster analysis could distinguish the individual of 3 geographic populations clearly. The principal coordinates analysis (PCA) of polymorphic bands showed this result directly.
UPGMA聚类分析能够清楚区分3个地理居群的个体，多态条带表型的主座标分析（PCA）更直观地展现了这一结果。
The foundation soil is divided for finding the ultimate bearing capacity of a foundation with given buried depth and size. Supposing a uniform load acts on the foundation, Mindlin's integral formula and comer points method are used to get extra stress of every mesh knot by MATLAB program, then the principal stress is found. Combining with failure criterion, MATLAB program is used to find coordinates of points which are destroyed. Using graphic processing function of MATLAB, the failure points are showed in the coordinate.
为确定作用在已知埋深、给定基础形状地基土上的极限承载力，对基底下的土体进行网格划分，先假定一均布荷载作用在此地基土上，运用明德林解的积分公式，结合角点法，编制MATLAB语言程序，求出每个网格节点上附加应力，进而求得每个网格节点上主应力，根据破坏准则，结合程序找出破坏点的坐标，利用MATLAB的图形处理功能，把破坏点的坐标在坐标图中显示出来。