体密度

For general bipartite system [34], a complete set of invariants for generic density matrices with full rank has been presented.

对于一般的两体系统，[34]中给出了满秩一般密度矩阵的不变量的完全集合。

The variations of oxygen-containing functional groups in carbon black surface (［O ZJY〗CO］mainly) were the main factors influencing on surface and interface properties of carbon black,which could adjust the CB—LDPE interface interactions, and the n result in the change of morphology of carbon black dispersed in LDPE matrix.

正是由于炭黑表面性质的这种改变，从而调节了炭黑-低密度聚乙烯的界面相互作用，导致炭黑在聚乙烯基体中的分散形态发生了相应的变化。

Using canonical correlation analysis method to analyze the relation of nine stature traits and three semen quality traits of the line H males of recessive white rock, it indicate that the first canonical correlation coefficient between two traits is 0.8481(p.05), which takes up about 50.5%in total correlation information. The correlation relation between stature traits and semen quality mainly engendered by the heart girth(X8) and sperm concentration(X11), and it is a negative correlation .

用典型相关分析法对隐性白H系公鸡9个体尺指标与3个精液品质指标进行了相关分析，结果表明：两组性状间的第一典型相关系数为0.8481(p.05)，占总相关信息的50.5%，体尺性状与精液品质之间的相关关系，主要是由胸围(X8)和精子密度(X11)之间的密切相关所引起，此相关为负相关。

In this study, the electrical conductive composites (comprised of thermoplastic matrix resins-high density polyethylene, polyphenylene sulfide and polyarylethersuifone with cardo group, and conductive fillers-short carbon fiber, carhon black and graphite) are prepared and characterized in detail. The relation among composite structure and directalternating electric properties, some electric and magnetic parameters under X-band microwave and shielding effect, the mechanical behaviour are analysed. And furthermore, some relative experimental devices are developed.

本工作利用短切碳纤维、炭黑、石墨为导电填料填充热塑性树脂高密度聚乙烯、聚苯硫醚、酚酞型聚芳醚砜，制得具有良好导电性能和机械性能的导电性高分子复合材料，并以此为对象，研究了材料的稳恒电场和交变电场的基本特性与材料结构的关系，研究了在X波段微波场下的电磁参量及屏蔽效应，以及研究了复合材料及其基体树脂的力学行为，与此同时还建立了相应的表征测试手段。

The results showed that (1) Surface charge density of apoptotic cell of electret group was significantly reduced as compared with those of control group.

结果显示：（1）负极性驻极体作用3T3细胞能减少凋亡细胞的表面电荷密度。

Positive electret can restrain cell growth and reduce cell surface charge density.

正极性驻极体具有抑制成纤维细胞生长和降低细胞表面电荷密度的作用。

In comparison with the bulk material,smaller magnetization,larger coercive force and anisotropy energy density for nanoparticles were observed.

相对块体材料，纳米颗粒具有较小的磁化强度、较大的矫顽力和各向异性能密度。

In this paper. we discuss the history origin of integral geometry, its product anddevelopment in the introduction. Also. the kinematic in-variant density formulas forpairs of needles and lines in R~2 and R~3 the concept and properties of chord-powerintegrals of a convex body are introduced in brief.

本文在绪论部分综述了积分几何与几何概率的历史渊源及它的产生与发展，简单介绍了R~2和R~3上点偶、线偶的运动不变密度公式以及凸体的弦幂积分的概念和性质。

A human model using polynomial convolution surface is presented which is modeled by articulated skeletons convolved with some kernel function. The convolution surface and curve correspondence theorem under orthogonal projection is presented. The human contour is approximated with a convolution curve and 3D human pose can be estimated using a nonlinear optimization algorithm.

首先建立了一种新颖的多项式密度卷积曲面人体模型，该模型由连接体线骨架与某种卷积核卷积而成，整个曲面是一张连续曲面，调节多项式和半径参数可以让人体任意变形；给出了正交投影下卷积曲面和曲线对应的概念和相关定理，为二维的图像轮廓和三维人体模型之间建立对应关系；根据正交投影下卷积曲面与曲线对应定理，用卷积曲线去逼近人体的图像轮廓曲线，从而估计和恢复出三维人体运动姿态。

The body density has a negative correlation with the cross-sectional areas of the thigh, but positive correlation with fat ratio.

运动员身体密度与大腿断面各组成的面积均呈一定的负相关，而体脂率与其呈正相关。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐