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In this thesis, the crystal structure and phase transition behaviors of a andβforsterite (Mg2SiO4) at high temperature and high pressure were investigated by the first principle calculations and the quasi-harmonic Debye model. Variations of elastic properties, band structure, density of state, band gap ofαandβforsterite with pressure were calculated, and the effect ofα/βphase transition on these characters was analyzed. The effects of water on elastic modulus, sound velocity and band gap of forsterite were also simulated. Finally, the effect ofα/βphase transition and water on seismic discontinuity in earth was discussed.

通过第一性原理结合准简谐德拜模型研究了α和β镁橄榄石的高温高压结构及相变特征；计算了α和β镁橄榄石的弹性模量、波速、电子带结构、带隙等随压力的变化规律，并探讨了相变对这些性质的影响；研究了水对α镁橄榄石弹性模量、波速和带隙的影响；探讨了水对地幔中不连续层的作用以及矿物相变对过渡带波速不连续的作用。

The variations of macular volume and foveal thickness were smallest.

黄斑容积和直径1mm中心环视网膜厚度这两个指标的变异最小。

Earthquake source faults of continental intraplate are characterized by complicated regional variations which depend on tectonic settings and geodynamic processes.

大陆板内的震源断层具有复杂的区域特征，依赖于构造环境和地球动力学背景的差异而变化。

In order to evaluate the effects of important ecophysiolorical factors, such as light intensity, temperature, relative humidity, leaf structure(SLW, specific leaf weight; and SLA, specific leaf area) etc., on the net photosynthetic rate of Gordonia under natural conditions, the diurual and seasonal variations in Pn are measured with the improved dry-weight method.

为了探讨在自然条件下重要生理生态因子，如光照强度、温度、相对湿度、叶结构(SLW，单位叶面积干重；SLA，单位叶面积率)等对四川大头茶净光合作用的影响，本文采用改良半叶法测定四川大头茶净光合作用日变化和年变化，并结合遮阴实验详细研究了生理生态因子与Pn的关系。

Relationship between seasonal variations in gymnodinium spp.

大亚湾裸甲藻种群的季节变化与环境条件的关系。

New strains with high protein and fatty acid and high yield could be selected by HAB.The characteristics of these variations in the new strain is hereditable.

经高空气球搭载可选育出高产、蛋白质和脂肪含量高新品种，这些新品种的性状变异在后代中能够表达，可以遗传。

Surveys of their cocoon and filament quality show variations compared with control plot, found a mutant that has hereditable character. All those indicated that He-Ne laser has distinct inductive effects on mulberry wild silkworm.

丝质调查与对照相比也有差异，产生显著差异的个体，能继代遗传，显示He--Ne激光辐照对野桑蚕生理生化性状有明显影响。

Inclinical,CML has been divided into chronic period,acceleration period andblast period.Each period has distinct heterogenicity,and,extra variations ofchromosomes and genes emerge in blast period.

CML在临床上分为慢性期、加速期和急变期，它们在细胞遗传学及分子生物学上存在着较大异质性，在急变期常会出现额外的染色体和基因的变异。

Results The study showed hish variations in prevalence of infection and infection intensity across villages,ranging between 3%-73%,0.1-100 epg,respectively.

结果 现场调查显示以村为单位的人群血吸虫病感染率和感染强度分别在3%～73%和平均克粪虫卵数在0.1至100.0之间。

OBJECTIVE: To summarize the characterization of epithelial cells and epidermal stem cells and their interaction in wound healing so that we can recognize the mechanisms of scarring from histomorphology, biochemistry and molecular variations.

目的：总结上皮细胞与表皮干细胞的特征以及在创伤愈合中的相互交织作用，从形态学和分子生物学上提高对瘢痕形成机制的认识。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。