小角

The major purpose of this article was to illustrate the innovating instruction of the topic-"triangle" for the third graders. From the experience of the classrooms, it is considered that the curriculum is only to instill into children some geometric nouns, such as the sides, the apexes and the angles. A closed graph with three angles is usually to be named as a triangle without thinking about children's understanding of the real meaning.

本文的主要目的乃是针对教学者本身以往在教国小三年级学童的「三角形」这个单元时，自觉只是在灌输孩子一些几何的名词，例如：这个就是边、顶点和角；有三个角的封闭图形就是三角形，并没有去考虑到孩子是否真正的理解这些语词的涵意。

The effects of FPL andits three ingredients on growth of ovary,on micro-and ultra-structure andAlkaline phosphatase activity of endometrium,on structure andkeratinization rate of exfoliated cells in vaginal epithelium in mice,onmicrocirculation in rat and on uterine kinesis in rabbit were respectivelyobserved by the techniques of light and electron microscopes,histochemistry,microcirculation and organ cinetography.The results have confirmed themechanism of FPL for the sterility caused by ovary standstill and persistentcorpus luteum to be as follows:(1) a weak estrogen-like role which canprompt development of ovary,proliferation and secretion of endometrium andvaginal epithelium and cornification of exfoliated cells in vaginal epithelium;(2)enhancing AKP's activity of endometrium;(3)improving microcirculation;(4) exciting uterus.

分别采用光学显微镜和电子显微镜技术、组织化学技术、微循环技术和器官运动描记等现代医学实验技术，观察了促孕液对小白鼠的卵巢发育、子宫内膜的显微和超微结构和碱性磷酸酶活性、阴道上皮结构和脱落细胞的角化率、对大白鼠的微循环和对家兔的子宫运动的影响，结果证实了促孕液治疗卵巢静止、持久黄体的机理：(1)微弱的雌激素样作用，能刺激卵泡发育，促进子宫内膜和阴道上皮增生、分泌和阴道上皮脱落细胞角化；(2)提高子宫内膜碱性磷酸酶的活性；(3)改善微循环；(4)促进子宫运动。

Analyzed the changing of energy loss in turbine cascade with different backward wedge angles,and achieved the range of the backward wedge angles corresponding of the minimum energy losses on three typical sections in the turbine cascade.

分析了叶栅能量损失系数随不同后楔角的变化，得到了在该涡轮叶栅内对应最小能量损失的3个典型截面上的后楔角的范围。

By using this method, the angular frequency, amplitude, initial phase angle, decay constant of each component in transient voltage and/or current waveforms can be precisely extracted. Also, all other kinds of transient procedure can be analyzed by this method. Thirdly, a new definition of generalized instantaneous reactive power and generalized instantaneous reactive current in dq0 coordinates under any nonsinusoidal and unbalanced three-phase circuit is proposed for the first time. The detection and compensation method for different instantaneous reactive currents are also concerned.

本文首先提出了用于快速高精度频谱分析的一种改进快速傅立叶变换方法，该法具有速度快、精度高、抗混迭、不受采样定理约束、可以分析出谐次大于N／2的频谱系数等特点，可方便地应用于电力系统谐波分析及其它各类频谱分析；然后提出了基于非线性最小二乘优化法的电力系统暂态波形分析方法，可准确求出电力系统暂态电压、电流波形中各个分量的角频率、幅值、初相角及衰减常数，并可广泛应用于各类暂态过程波形分析。

Due to the transmission angle of the flexible rod deviates from 90°less than others, the pumping unit overcome the "dead angle restricted"problem of the conversional pumping unit and fixed four rods structure.

由于连杆为柔性杆，其传动角偏离90°较小，克服了常规机和固定四杆机构的"死角制约"问题，游梁摆角比常规机可加大30—50%。

When the water discharge is large, the curvature and the jet-trajectory angle should not be too big in order to assure the diffusibility.

在挑坎末端高程相同的条件下，下泄流量较小时，曲率和挑角越大，水舌单宽流量的横向分布越均匀，水垫塘底板最大时均压力越小；大泄流量时，曲率和挑角不宜过大，以保证水舌扩散效果。

Since theparabolic system is an approximation from the elliptic system under small ray angle,we may have reasons to question the result of the parabolic system under large rayangle.

由于抛物方程是椭圆方程在小掠射角条件下的近似，我们有理由对抛物系统在大掠射角情况下的考察结果的可靠程度保持怀疑。

Test and analysis show that, the distribution patterns of the tangent veloctiy fields in the big cone area and the small cone area, which are comprised of para-free vortex and para-forced vortex, are basically identical without a change of the radius of the boundary surface; with the increase of the angle of the small cone, the para-free vortex area decreases and the para-forced vortex area increases, and the emulsifiability of the fluid drips increases with the increase of velocity gradient; the tangent velocity increases with the increase of inlet flow, and the maximum tangent velocities of both the big cone area and the small cone area are 4.94 times of the inlet flow; and the maximum tangent velocity increases with the increase of the split ratio and with the radius of the boundary surface not changed.

试验分析表明，大锥段和小锥段切向速度分布规律基本相同，均由准自由涡和准强制涡构成，分界面半径rm没有变化；随着小锥角θ的增加，准自由涡区缩小，准强制涡区扩大，速度梯度增加会加大液滴的乳化程度；随入口流量增加，切向速度增大，经拟合得出大锥段和小锥段的最大切向速度均为入口流量的4.94倍；分流比加大，分界面半径基本不变，最大切向速度增加。

The discharge coefficient increases rapidly as the increase of the pressure ratio in the small blade entrance angle while change smoothly in the big blade entrance angle.

在较小几何进气角时，流量系数随压比增大而增大，在较大几何进气角时，流量系数随压比变化不大。

We find that the source region consists of two components: one is the core corresponding to the leading sunspot of group with a smaller diameter and a higher temperature, another is the halo arrounding core and corresponding to flocculus with a larger diameter and a lower temperature.

发现源区域由两部分组成，即对应于黑子群中前导黑子的角径较小、度较高的核，和对应于色球钙谱斑、绕核的角径较大、度较低的晕。

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。