三角

If Z is a torsion-free abelian group, then the matrices of L relative to a suitable homogeneous basis of V are uppertriangular.

如果Z是挠自由的群，那么，在V内可选取一组齐次元素组成的基，使得L的矩阵是上三角的。

Methods Two hundred and ninety seven middle-aged and aged females were sampled randomly from the cases who were examined in the bone mineral density measurement department of The Second Affiliated Hospital of Nanchang University from January 2004 to January 2006, and their age, stature and body weight were recorded exactly. The BMD of lumbar (L2~4), femoral neck, Ward's and great trochanter was measured by dual energy X-ray absorptiometer, then statistically analyzed.

从2004年1月～2006年1月在南昌大学第二附属医院骨密度测定室检测的就诊者中随机抽取297例中老年妇女，准确记录其年龄、身高、体重；采用法国DMS公司Challenge：双能X线骨密度测定仪检测腰椎(L2~4)、股骨颈、ward's三角以及大转子的BMD，然后进行比较和统计分析。

In this paper, we discuss and resolve several problems, such as: the tansformationg form STEP neutral exchange file to data-base file; pick-up entity information and surface triangulation in ACIS; out-put VRML format file.

本文阐述了其中所包括的STEP中性文件到数据库文件的转换，基于ACIS的实体信息数据提取以及实体表面的三角剖分，VRML格式文件的输出等技术问题及其解决方法。

The larger the acromion index, the higher the ascending force component during active abduction and the higher of the pressure in the subacromial space. The situation may cause the subacromial impingement syndrome.

在较大的肩峰指数所反映的肩峰肱骨头位置关系中，外展时三角肌对肱骨头向上的分力大，肩峰下间隙内压力高，易引发肩峰下撞击综合征。

Either way, the seams of the shirt should lie on the curve of your deltoids (those are the muscles right behind your shoulders—the ones you'd work if you did push-ups).

或者，T恤的省/缝应该取决于三角肌的曲线三角肌在背部正后面，就是做跗卧撑时运动的肌肉

This method avoids the complex computing of cutting tri-prism in current methods by parameterization of surface triangulations.

该方法利用三角网格参数化在地层面三角网的基础上重建类三棱柱网格模型，避免了现有类三棱柱建模方法中切割三棱柱的复杂计算。

This method can effectively reduce the numbers of artificial dams and local minima.The algorithm has been implemented in five different terrains,showing that the method can effectively reduce the numbers of the local minima.So,it is more realistic for generating terrains model with higher order Delaunay triangulations.

实验结果表明，高阶Delaunay三角网能够有效地减少地形中局部极小的数量，因此，采用高阶Delaunay三角网建立的地形模型更接近于实际地形。

Firstly, because the triangle constrained matching propagation begins with the initial corresponding triangulations formed by a few seed points in the stereo pairs, this dissertation studies the affects of different numbers and different distributions of seed points on the image matching results through experimental analysis, and proposes a seed point selection strategy for different image texture conditions, an automatic selection algorithm is also designed that gives good distribution quality for a defined number of seed points.

首先，针对匹配传播过程中的种子点选取问题，通过实验分析研究了不同数量与分布的种子点所构成的初始三角网对匹配结果的影响，进而提出了不同影像条件下的种子点选取策略和一种自动提取一定数量、满足一定分布均匀度的种子点自动选取算法；其次，研究了海量数据情况下同名三角网的快速构建、数据组织存储与局部动态更新的方法；在此基础上，本文提出了随机传播、基于三角形拓扑关系的邻近传播和顾及纹理特征的自适应传播等三种传播策略，分别介绍了其详细的实现算法，并通过实验分析对这几种传播策略进行了比较，实验结果证明自适应传播方法在匹配的可靠性上最优。

During the TIN generating, it puts emphasis on analysis and treatment discrete data using Delaunay triangular net.

在不规则三角网TIN的生成中，重点采用Delaunay三角网分析和处理离散点的数据。

The Forum is jointly sponsored by China Council for the Promotion of International Trade and Invest in Sweden Agency ,and organized by Changxing County of China and Kalmar County of Sweden.

中国长三角与欧洲波罗的海地区合作发展论坛是由中国贸易促进委员会和瑞典政府投资促进署共同主办，中国长兴县和瑞典卡尔马省具体承办，旨在促进中国长三角地区与欧洲波罗的海地区经贸、科技合作、交流，推进两地共同发展的大型国际性论坛。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。