角形

It comprises an in-put shaft hinged to its yoke through one axis, and an out-put shaft also hinged to its yoke through another axis, and these two yokes (13) were combined together by only one axis position, perpendicular to that two yoke axes like a cross, so that this combined axis will bend just like the angle bisector of that two shafts to maintain its constant velocity by a few methods, firstly, by using a section of gear teeth mesh at both ends of the shafts' teeth were so polished so that it can turn longitudinally as usual gear, and also sideways, to provide a larger solid angle of turning from ordinary 45 degrees into 60 or even more.

它包括输入轴，其通过一根轴铰链连接于叉形支架，和输出轴，其通过另一根轴也铰链连接于其叉形支架。并且这两个叉形支架(13)只需用一根相对垂直铰链轴相连而组合在一起，使得这种组合的轴总能形成这两个轴的角平分线，以通过少数几种方法保持其恒速，首先，通过用啮合在轴的两端的一段齿轮齿抛光为以能够像普通齿轮一样纵向转动，并且还能够侧向转动，以提供较大的转向立体角，从通常的45度变成60度或更大。

Another new spatial 3-RPS parallel pyramid manipulator mechanism is studied. The principal screws of this mechanism under three different configurations are identified by means of the conic section and the quadric degenerating theory, respectively. The planar conics representing the relations between the pitches of the output twists and the three linear inputs are described, and the three-dimensional distribution of the axes of all the twists with the same pitch is illustrated under each of the configurations.

研究了另一种新的空间三自由度3-RPS并联角台机构，分别用二次曲线和二次曲面分解法识别该机构在三种位形下的主螺旋，绘制了其在每种位形下的输出运动螺旋的节距与输入之间的平面图以及具有相同节距的所有运动螺旋轴线在每种位形下的空间分布的立体图。

In this paper,the methods of distance geometry are used to explore the angles of a simplex ,and the second cosine law of a simplex in another form is obtained.

运用距离几何的研究方法，研究了和单形相关的角，给出了单形第二余弦定理的另一种形式，以此为基础得出了BartO¨s体积公式一种简洁的证法；探讨了单形的几个体积公式之间的联系，并推广了单形的一个体积公式。

Leaves 5, not fully expanded at anthesis; petiole 5.5--15 cm, with thick long pilose hairs; leaf blade nearly kidney-shaped, rounded-ovate, or 5-angled, 2.5--7 × 4.5--11 cm,± equally 3-foliolate, abaxially with white hairs, adaxially glabrous, base broadly cordate; lateral leaflets subsessile, unevenly 2-lobed; central leaflet subsessile or with a 1--4 mm petiolule, deeply 3-lobed, lobes entire or dissected, ultimate lobes triangular to narrowly linear and 2--3.5 mm wide.

叶5，不完全膨大的在花期；叶柄5.5-15厘米，具厚具长柔毛毛；叶片差不多肾形，圆形卵形，或具5个角， 2.5-7 * 4.5-11厘米，多少具3小叶，背面具白色的毛，正面无毛，基部宽心形；侧生小叶近无柄，不均匀2裂；中心的小叶近无柄或具一1-4毫米小叶柄，3深裂，裂片全缘的或多裂，末级的裂片三角形到狭线形和2-3.5毫米宽。

An accurate measurement scheme is proposed for testing the error of cone prisms with Hartmann wavefront sensor. The measurement theory was discussed, the reconstruction of the wavefront reflected from a cone prism was studied, and the relation between the wavefront characteristics and the errors of a cone prism was given.

因此，提出一种用哈特曼波前传感器全面检测角锥棱镜角度误差和面形误差的技术方案，从理论上分析了哈特曼法的测量原理，深入研究了光经过角锥棱镜后的波面重建，给出了波面特征与角锥棱镜误差参量之间的关系。

Leaf blade oblate to 5-angled or oblate to orbicular-ovate, apex often 3-lobed, base often truncate or subcordate; spikes well branched into subpanicle.

叶片扁球形到具5个角或扁球形到圆形卵形的，先端通常3浅裂的，基部通常截形或近心形；穗状花序多分枝成近圆锥花序 16 B 。

The porosity and pore size distribution of HVFA pastes and concretes were determined by autoscan porosimeter. The results show that excessive fly ash content and comparatively high water-cementitious materials ratio will cause a big increase in porosity and harmful pore in HVFA pastes.

首次把X射线小角散射技术用于测定高掺量粉煤灰水泥浆体气孔—固体界面的分形维数，并就粉煤灰掺量、水胶比对气孔—固体界面分形维数的影响进行了分析，发现过高的粉煤灰掺量和较大的水胶比均会使分形维数大幅度增加。

Especially in processing of the special metallic materials. According as the adaption orthogonal tool edge bottom diameter and scraps' groove of taps ,using computer aid design the taps' trough shapes of taps, in order to tangency of the orthogonal .scraps' groove and tool edge' hack angle, making the scraps into streamline rolling scraps.

尤其被加工材料是特种金属时，根据丝锥所适合的前角、刃瓣、心径以及所允许容屑槽大小，运用计算机辅助设计改进丝锥槽形，使得丝锥前角、槽底圆弧以及齿背角光滑连接，切屑成流线形卷屑。

Cui teacher, respectively, as "ruler, regulation," or "a sub-Square", demonstration, complete the "arbitrary angle trisection, turning round to square, fold the cube, as is 7-gon, as is 9-gon, as is 10 side of the shape, as are 13-gon "Seven dead title.

崔老师，分别用&尺、规&或&一把分角尺&，演示、完成了&任意角三等分、化圆为方、倍立方体、作正七边形、作正九边形、作正十一边形、作正十三边形&七大死题。

After 3800 Death of the World's top math problems -- Ruler as "arbitrary angle trisection, turning round to square, fold the cube, as is 7-gon, as is 9-gon, as are 10 side of the form, as are 13-gon," The world, where people called mathematicians have challenged the "seven problems" Archimedes Newton Gauss, etc., Are hard to understand in the end.

历经3800年世界顶级数学死题——尺规作&任意角三等分、化圆为方、倍立方体、作正七边形、作正九边形、作正十一边形、作正十三边形&，全球，凡称得上数学家的人都曾挑战过这&七大难题&，阿基米德、牛顿、高斯等等，均以不得其解而告终。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。