晶粒

The discrete least- squares approximation method is proposed to determine the edge of the die first, then to estimate its centroid after the image processing.

而本影像识别之方法采用离散最小平方法逼近 discrete least-squares approximation 晶粒边缘，用以求得晶粒形心与摆向方位角度。

The effect of a kind of efficient grain refiner on the macrostructure of aluminum alloy was investigated.

本文研究了一种强有效的晶粒细化剂对铝合金宏观晶粒组织的影响。

The results showed the specimens by vacuum sintering had a typical Widmannstatten microstructure, which possessed coarser prior β-grains and secondary platelet α+β-phase, but the alloy had a more microporosity and a lower tensile strength and ductility. After HIP treatment, prior β-grains and secondary platelet α+β-phase became fine and uniform, and the alloy possessed a less microporosity and a higher tensile strength and ductility.

结果表明：真空烧结Ti-6Al-4V合金具有典型的魏氏体组织，其初始的β晶粒粗大，β晶粒内为次生片状α和薄β相片，空隙较多，合金的强度和塑性较低；合金经热等静压处理后，组织明显细化且均匀，空隙很少或几乎没有，从而强度和塑性都有所提高。

Monte Carlo computer simulation of grain growth is very important in research of grain growth.

晶粒生长过程的蒙特卡罗法计算机模拟是研究晶粒生长过程的重要内容，而Voronoi模型的建立是该计算机模拟的关键。

It is feasible to overgrow mesoporous MCM-41 on the rough surfaces of the grains. The obtained samples possess the ordered hexagonal mesoporous structure of MCM-41-type molecular sieves. Mesoporous molecular sieves (denoted as MZ-B) with ordered hexagonal structure have been successfully synthesized by the assembly of the precursors from filtrate of alkali-treated ZSM-5 zeolite with CTMABr surfactant micelles in alkaline media based on S+I– static electricity route.

而碱处理ZSM-5沸石得到的滤饼为富含超细化颗粒的晶粒，且晶粒粗糙度很高，因此易于附晶生长介孔分子筛，得到的微孔颗粒表面附晶生长的介孔分子筛，具有很好的长程有序度，为六方排列的孔道结构。

Finally, the PEC-treated LEDs are packeted as the TO-Can and Lamp formal to measure the output power. The fabricated LEDs through the PEC process have 14.6% output power enhanced compared with the general LED at 20 mA operation current.

最后将基板磨薄切割劈裂成晶粒，并且以 TO-Can 与 Lamp 形式封装，量测电性资料与光学特性，发现表面结构的改变也影响发散角度，经过处理的晶粒有较大的发散角度，最终封装成 Lamp 形式的光输出功率增加14.6%。

Crystal size of the iron based alloy foil is less than 10μm, while the crystal size of the nickel based alloy foil is about 2μm. Results show that the electrodeposited Fe-Ni foil has better magnetic properties than conventional milled Permalloy 1J79 foil.

实验表明：电沉积铁基合金箔晶粒小于10 μm，电沉积镍基合金箔晶粒大小在2 μm左右；电沉积Fe-Ni合金箔是一种性能良好的软磁材料，其基本磁性能优于传统熔铸-轧制坡莫合金1J79。

The results of experiment indicate that the films have the characteristic as the persistent photoconductivity effect .

实验结果表明，所制备的多晶硅薄膜具有类稳恒光电导效应，而且薄膜的稳恒光电导特性依赖于薄膜的晶化率和晶粒尺寸，随晶化率的增加和晶粒尺寸的增大而增大。

Among these particles, the prismy crystals and regular cubic crystals were specifically identified as sulfates of Ca and NaCl from sea salt respectively. But the spherical, fractal and sheet-like particles have very diverse compositions. b The composition of fractal particles is the most complicated, and that of spherical ones is less complex.

其中，棱柱形长棒晶粒和规则的立方形晶粒具有特定的组成，分别为钙的硫酸盐和来自海洋的NaCl晶体，而球形、块状和片状颗粒元素组成变化较大。b块状颗粒的化学成分最为复杂，球形颗粒其次。

It is shown that the lamellar spacing is inversely proportional to cooling rate and increases with decreasing colony size and increasing Al content.

通过分析锻造TiAl基合金在热处理时晶粒长大的动力学，发现TiAl基合金的晶粒尺寸依赖于热处理温度和保温时间。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。