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Sequence analysis showed that the amplified 16S rDNA fragment was closely related to those in the 16Sr Ⅰgroup, with a homology rate of more than 99 %. This fragment had maximum homology, upto 100 %, with those of Ash witches' broom, Epilobium phyllody, and Chinaberry witches' broom phytoplasma strain Jiangxi. Its similarity of 16S rDNA sequence is obviously lower than 97 % as compared with other phytoplasma groups.

结果表明,该片段与16Sr I组中的各植原体同源率均达到99 %以上,其中与16Sr I中的白蜡树丛枝(Ash witches'-broom,AWB,AY566302),柳叶菜变叶(Epilobium phyllody,EP,AY101386)和苦楝丛枝江西株系(Chinaberry witches'-broom,CWB-JX,AY859543)的同源率最高,达到100 %,而与其它组的植原体16S rDNA序列的同源率均低于97 %。

On this foundation, the followingfew problems are resolved. Firstly, we have a kinematic density formula for pairs of needles by using thekinematic density formula for pairs of oriented lines. The geometric probability thatthe random pairs of needles intersect at a point in convex body K is considered.

在此基础上,重点解决了以下几个问题:首先利用R~2上有向直线偶的运动不变密度公式,得到了针偶的运动不变密度公式,考虑了针偶与凸体K相交且针偶的交点属于K的这样一个几何概率问题。

So we mention another geometricprobability problem which is the geometric probability of the intersection of pairs ofintersecting lines belonzs to convex body K in R~2 by using the concept of doublechord-power integrals and a kinematic invariant density formula for pairs of lines.

利用R~2上双弦幂积分的概念和线偶的运动不变密度公式,提出了另一个几何概率问题:R~2上两根与凸体K相交的小针依附在两直线上,求两直线的交点落入凸体K内的几何概率。

This article applies the simplified differential coefficient equation on rising-sinking and swinging movement of high-speed sliding body model in the static water. The paper presents a method of theoretical prediction for the movement of high-speed planning hulls with a constant dead rise angle in regular waves.

应用简化了的高速滑行体模型在静水中滑行的升沉和纵摇运动的微分方程,提供了对不变侧缘角的高速滑行体在规则波浪中运动的动力分析方法。

Moreover, this paper makes an effort in incorporating theCosserat theory in the VCFEM for the elastic-plastic analysis of heterogeneous materialsbased on the PVP. The chapters are divided as follows: In Chapter 1, the author summarizes the study on the equivalent mechanics properties ofheterogeneous materials (including the development of the universal relationship which isirrelevant to the micro structure, the discussion of the limitations of the effective moduli, thecomputation of the effective properties of heterogeneous materials with the micromechanicsmethod and the FEM, and the equivalence of the heterogeneous micropolar materials) and thepresentation, the evolution, the corresponding numerical studies of the Cosserat model and itsapplications in engineering.

本文基于参数变分原理,构建了Cosserat体弹塑性有限元分析模型并用于求解应力集中和应变局部化问题;利用Voronoi有限元法提出了适用于非均质材料宏观弹塑性性能计算的参数二次规划算法;进一步将Cosserat模型应用到Voronoi有限元法中,提出了基于Cosserat理论的Voronoi杂交有限元法,并采用参数变分原理进行新模型的分析计算。

The result shows that B combines with N prior to Al at high temperature and brings about coarse particles of BN (about 900 nm), which effectively reduces the amount of fine and dispersive AlN particles, and BN precipitate clinging to MnS precipitation coarsens MnS particles, the pinning of austenite grain boundary is alleviated and the grain growth of ferrite is suppressed.

结果表明高温时B优先于Al与N结合生成粗大的BN粒子(约900 nm),有效降低了热轧过程细小而弥散的AlN析出量,同时BN依附MnS析出而粗化MnS粒子,减弱了细小弥散析出粒子对奥氏体晶界钉扎以及相变后铁素体晶粒长大的抑制作用。

The injection moulding shrinkages of HDPE/LLDPE blend and its blend filled with CaCO3 were studied.

研究了高密度聚乙烯/线性低密度聚乙烯共混物及其碳酸钙(CaCO3)填充体系的注射成型收缩率,分别用示差扫描量热仪和AR2000高级流变仪分析测定了共混物的结晶度和熔体黏度,并探讨了不同配比下共混物结晶度和熔体黏度与成型收缩率的关系。

The injection moulding shrinkages of HDPE/LLDPE blend and its blend filled with CaCO3 were studied. The effects of the crystallization and melt viscosity of the blends with different mass ratio on the shrinkage were analyzed by means of DSC and advanced AR2000 rheometer.

研究了高密度聚乙烯/线性低密度聚乙烯共混物及其碳酸钙(CaCO3)填充体系的注射成型收缩率,分别用示差扫描量热仪和AR2000高级流变仪分析测定了共混物的结晶度和熔体黏度,并探讨了不同配比下共混物结晶度和熔体黏度与成型收缩率的关系。

The effect of tilting in oxygen octahedra on the dielectric properties is due to the interoctahedral angle increasing to 180℃ consuming the thermal energy, which results in the less effect on polarizability with increasing temperature.

氧八面体扭转能使介电常数温度系数朝正的方向变化的本质是,氧八面体间角吸收热能朝180℃变化,导致纯温度变化对极化率的影响变小。

Models of physical activity, functional fitness, and the number of fall, and the fall efficacy among elderly according to different living arrangement and health status perceptions were identified.

本研究发现人口学变项、自觉健康、跌倒资讯的有无等变项和身体活动、体适能的交互作用,可以解释20.3%跌倒次数与28.6%跌倒效能的变异量。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

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我比喻得过头了。