中心体

The full space calculation model, which suits for the asymmetric structure sometimes even including air below the surface of medium, can enable simulative result to approach real one. The FDTD algorithm based on the mixed ABCs is proper to calculate the transmission line where the electromagnetic wave is transmitted in order to send electromagnetic energy along central conductor. The calculation efficiency will be raised if the PML absorbing boundary condition is set on both planes of transmitting direction and so is the MUR two-order absorbing boundary condition in the other planes.

全空间计算模型是适合所有的不对称结构的待研究体的，而且包括了介质下面的空气部分，使仿真更加的接近实验真实情况；基于MUR-PML混合吸收边界条件的时域有限差分法非常适合计算传输线这种结构，因为传输线是传送电磁波的，电磁能量主要是沿着中心导带行进，因此在两个传输端面上设置PML完全匹配层吸收边界条件，在其他面上设置MUR二阶吸收边界条件，会大大提高计算效率，而且计算结果与XFDTD仿真软件计算结果相比较，基本趋于一致。

The result indicates that in the designed center of the wavelength, the retarder is not only confined within the low dispersive medium, but high-index material with higher dispersion can also obtain good achromatism, and at the same time the bigger angle of total reflection can improve achromatism of the phase retarder.

从全内反射相变方程出发，以菲涅尔菱体为例，分析了消色差相位延迟器的相位延迟量随折射率变化的光谱特性，结果表明：在所设计的中心波长处，延迟器件不仅仅局限于选择低色散的材料，色散较大的高折射率材料制作的延迟器件也可以具有良好的消色差性，且较大的全内反射角有利于改善延迟器件的消色差性。

This paper proposes that weak acid is a coordination compound that regards hydrogen ion as "coordination body" and regards acid radical as central atom.

本文首次提出将弱酸看成是以氢离子为"配体"，以弱酸的酸根为中心"原子"所形成的"配合物"，通过计算该"配合物"的生成函数N并绘制PH－N图，用Bjerrum，N。

These ligands were found to be very effective in construction of quaternary carbon centers by using asymmetric allylic alkylation.

这类配体在前手性亲核试剂的不对称烯丙基化构筑手性季碳中心的反应中，显示了较好的反应活性及对映选择性。

The ligands were found to be effective in palladium-catalyzed asymmetric allylic alkylation to construct chiral quaternary carbon center.

这类配体在前手性亲核试剂的不对称烯丙基化构筑手性季碳中心的反应中，显示了较好的反应活性及对映选择性。

Here we show that PRC1 recruits CLASP1 to the central spindle at early anaphase onset.

根据PRC1在中心纺锤体组成过程中的作用，我试图解析PRC1功能蛋白质群的分子构成及其作用机制。

Based on measuring data of relative solar irradiance on absorbers with cylindric shapes in evacuated collector tubeas well as that of solar absorptivity changing with incident angles on the coating,this paper has analyzed and investigated regular patterns of energy gain factor changing with incident angle at different center to center distances of ECT with cylindric absorbers.

在实验测定吸热板表面相对太阳辐照度和涂层太阳吸收比的基础上，分析研究了具有圆柱形吸热体的真空管集热器，在不同管中心距下的能量收益因子随光线入射角的变化规律。

Moreover, these circular structures were also divided into Archaean gneiss dome, intrusive body, buried intrusive body, volcanic center texture, ring fracture and fault, according as their genesis mechanism.

从成因机制上，这些环形构造可划分为太古宙片麻岩穹隆构造、岩浆侵入体、隐伏岩浆侵入体、火山中心机构及环状裂隙或断裂等形成的环形构造。

The SalesCenter taken as a platonic solid in space exudes its pure form in a given perspective. From it, the SalesCenter is designed with its form or interplay of a body or a volume in space.

作为空间里的纯体块，售楼中心被设置到透视图里后散发出其纯净的形态；从而，售楼中心的形态被设计成空间里互相影响的体积或容量。

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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。