角

A new feature angle criterion and local greedy triangulation method are presented to simplify vertexes of smooth polyhedral model.

提出了顶点的特征角定义方法、特征角准则及删除顶点后对遗留空洞的局部贪婪剖分方法，解决了多面体表示的光滑曲面模型的简化问题。

The research results are as follows:1. EpNPV is a kind of nuclear polyhedrosis virus.

结果表明： 1.EpNPV为核型多角体病毒，多角体为不规则的三角四面体，大小为0.95～2.69μm，平均1.72±0.07μm。

Polyhedron particles of Antheraea pernyi nuclear polyhedrosis virus were isolated and purified.

对柞蚕多角体病毒的多角体颗粒进行了分离和纯化，并在显微镜下进行了形态观察。

Cytoplasmic polyhedrosis virus which can infect more than two hundred insects belongs to the Cypovirus genus in the Reoviridae family.

质多角体病毒属呼肠孤病霉科质多角体病霉属，其宿主包括200多种昆虫。

The vessel's upper deck camber is to be of knuckled line, and the knuckle camber is 150mm; poop deck has parabola camber of 150mm; compass deck is to have a parabola camber of 150 (half width of 12m).

本船上甲板梁拱为折角线，折角梁拱为150mm；首、尾楼甲板为抛物线梁拱150mm；罗经甲板为抛物线梁拱150（半宽12m时）。

Sub-volcanic rocks include andesitic porphyrite, rhylitic porphyry, cryptoexplosive breccia as well as autobreccia etc.(2) Volcanic lithofacies——through the observation of cores, identification of thin sections and interpretation of well logs and seismic data, there are 8 kinds of lithofacies for the volcanic rocks of Yingcheng Formation are identified: fallout facies, effusion facies, pyroclastic flow facies, base surges facies, lahar facies, eruption-sedimentary facies, subvolcanic facies and extrusion facies.(3) Three types of eruption——i. e. explosion, effusion and surge.(4) Two kinds of eruptive environments——Subaerial (e. g. volcano in Well Shangshen 3) and subaqueous .(5) Three remarkable volcanic apparatus in Shengping-Wangjiatun area——layered, micro-shield and cone volcanoes according to volcanic processes and lithofacies distribution.

次火山岩有安山玢岩、流纹斑岩、隐爆角砾岩及自碎角砾岩等；(2)火山岩相——通过岩芯观察、镜下鉴定、测井与地震资料解释，营城组火山岩中发育8种岩相类型，即爆发空落相、溢流相、火山碎屑流、基底涌流相、喷发沉积相、火山泥石流相、侵出相和次火山相等；(3)火山喷发的形式——有爆发、溢流和涌流三种；(4)火山喷发环境——有陆上(如尚深3井火山)和水下两种；(5)火山机构类型——根据火山作用特点和岩相分布特征，在升平—汪家屯地区识别出三类截然不同的火山机构，即层火山、微型盾火山和渣锥火山。

And the distribution of the magnetic shear angles exhibits the hemisphere sign rule as the asymmetry of helicity. In our dataset, 53% of the active regions in the south hemisphere have positive shear angle and 62

磁场剪切角具有南北半球符号的反对称手征性，在南半球有53％的活动区的磁场剪切角是正的，而在北半球有62％是负的。

A container. such as a powder horn.

角制容器一种由动物的角制成的容器。

The experiment results show that the method is effective in estimating precession angle and cycle when the precession angle is not very large.

实验结果表明，该方法在目标进动角不大条件下可以有效估计目标的进动角和进动周期。

Considering the effect of the angle of internal friction on the inclination of sliding plane of soils behind retaining wall, circular and catenary, the two shapes of minor principal stress arch are theoretically analyzed. According to the shapes of minor principal stress arch, the coefficients of earth pressure corresponding to different angle of internal friction and that of wall friction are gained.

为克服现有考虑土拱效应的土压力计算方法不能考虑墙土摩擦角变化对挡土墙后土体滑裂面的影响的不足，考虑墙土摩擦角变化对挡土墙后上体滑裂面倾角的影响，对圆弧和悬链线两种拱形分别进行了分析，并与现有方法计算结果进行了比较。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。