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The thermodynamical properties of the two dimensional square lattice and the three dimensional simple cubic lattice transverse Ising model with spin - 1/2 are investigated within the framework of the finite cluster appraximation.

本文在有限集团近似的框架内研究了自旋为1/2的二维平方晶格和三维简立方晶格横场伊辛模型的热力学性质,得到了相应的相图,临界温度和临界横场。

In this paper,that a series of sodium tungsten bronze crystals were prepared by electrolysis of molten salts containing sodium tungstic and tungstic oxide was reported.

文中采用熔盐电解法,电解钨酸钠与三氧化钨熔盐制备出系列钠钨青铜晶体,选用离子选择电极分析法快速、简便、可靠地测定了晶体中的钠含量,并通过X-射线粉末衍射确定了晶体的晶型结构及晶格常数a。

The result obtained form wide angle X-ray diffraction proves that the crystallite structure in the blend is still triclinic as the same as PET, and the cell index has no change.

用高斯和柯西混合函数对WAXD结果进行分峰处理后证实:共混物中晶体结构与PET相同,仍为三斜晶系,晶胞参数未改变。

P. P. Raevski〓, and pointed that this polarization at grain boundary between WO〓 monoclinic and triclinic phases causes a modification to Schottky barrier is origin of nonlinear electrical characteristic of tungsten oxide polycrystalline ceramics.

Raevski〓的铁电半导体非线性电输运理论模型的框架内,我们重点考虑了铁电极化对WO〓陶瓷非线性电输运特性的影响,指出由于三斜和单斜晶相的共存,在其晶界处存在的电极化可以对Schottky势垒产生一种修正,是导致出现压敏现象的一个重要因素。

In the third stage, the column-shaped ice crystals grew mainly in its length and the ice crystals had the acerose shape gradually, and the growth rate of frost thickness increased rapidly to 3-5.8 times that in the second stage. It is found that the performance degradation of the ASHP unit was caused by the wall temperature drop of the evaporator, the rapid increase in the frost thickness, and the decrease in the air flow rate.18Refs.

对实验结果的分析表明,热泵机组性能恶化主要是由于蒸发器表面温度下降、霜晶形态变化引起霜层厚度快速增长及空气流动阻力增加导致风机流量下降三个因素之间形成的恶性循环所致,其中换热器表面温度下降引起的霜晶形态变化起到了至关重要的作用。

The polycrystalline or amorphic diamond thin films may have three ways of field emission:"antenna effect", the emission site of quasi-n-type and low work function, the field emission of graphite particles.

多晶或非晶金刚石薄膜可能存在三种场发射方式:&天线效应&,准n型低功函数发射点和石墨微粒场发射。

The stress resistance of common roof garden plants, e.g. Dahlia hybrida, Callistephus chinensis, Calendula officinalis and Chrysanthemum multicaule were determined by mensurating such index as chlorophyll content, electrolyte leakage, water content, Pro content, MDA content and dissoluble sugar content. The result indicates that Dahlia hybrida is the best, Callistephus chinensis next, Calendula officinalis and Chrysanthemum multicaule are weaker as to drought resistance;while in the experiment on coldness resistance, the ability to bear coldness ranks from the best to the worst is Poa annua, Festuca arundinacea and Trifolium.

对小丽花、矮翠菊、金盏菊与黄晶菊等常见城市绿化植物进行的抗逆性试验研究,测定了叶绿素含量、膜相对透性、相对含水量、脯氨酸含量、丙二醛含量、可溶性糖含量等指标,结果表明:在抗旱性试验中小丽花的耐受性最强,矮翠菊次之,金盏菊与黄晶菊的耐受性较弱:抗寒性试验中所选植物材料的耐受性次序分别是早熟禾强于高羊茅强于三叶草。

GroupⅠ, the peridotite inclusions with typical pyrolite textures (metamorphic and deformation textures);(2) GroupⅡ, the peridotite and olivine-pyroxenite inclusions with metamorphic and deformation textures and overlaid mineral reaction textures or relic magmatic crystalline textures or/and cumulate textures; and (3) GroupⅢ, the pyroxenite inclusions with crystalloblastic texture and cumulate textures.

深源岩石包体的岩相学表明,鲁西深源岩石包体具有三种结构类型:①具有典型地幔岩结构的橄榄岩类岩石包体;②具有变质变形结构,并叠加有矿物反应结构以及残留有岩浆结晶结构的橄榄岩、橄辉岩类岩石包体;③具有变晶结构或堆晶结构的辉石岩类包体。

A disturbance to simulate fluctuations at the interface is added to simulate the growth of secondary and third dendrites.

研究了不同过冷度和各向异性系数等相场参数对枝晶生长的影响,最后采用加入非平衡扰动的方式,进行了二次及三次枝晶生长的模拟。

This company uses from produces the high-quality sapphire raw material, main production: Upscale sapphire glass, Shan Qiao, Twinbridge, Shan Bo, double divination, plane, slot, aperture, handset surface Bolivia, mp3 surface Bolivia, mp4 surface Bolivia, three agglutination chips, calendar crystal, heteromorphous table mirror as well as laser infrared sapphire window glass, pressure transmitter window, precision instrument instrument element and so on. The design is diverse, by the fine product, the price which most gives preferential benefit, provides the high quality at low price for the customer the commodity.

本公司采用自产高级蓝宝石原材料,主要生产:高档蓝宝石玻璃、单桥、双桥、单卜、双卜、平面、开槽、开口、手机面玻、mp3面玻、mp4面玻、三件粘合晶片、日历晶、异形表镜以及激光红外线蓝宝石窗口玻璃,压力传感器窗口、精密仪器仪表元件等。

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推荐网络例句

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

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。