查询词典 effective cross section

As a preliminary theoretical exploration, a limited series of stream function was employed to study the characteristics of the reattachment boundary layer. The tentative analysis showed that the reattachment boundary layer of the circular cylinder, so long as it began at the effective reattachment region discussed above, would be developing to its reseparated point downstream the cross section of the cylinder, which essentially gave the new idea RCDR a theoretical cycle.

本文提出的&再附—减阻&机制可表述为：柱面上扰流元件后向锐缘处诱发的流动分离，既改变了柱面压强分布格局，又破坏了柱面附近的流动状态；若扰流元件锐缘后方流动在圆柱壁面上再附，形成再附边界层，再附边界层将沿流向发展，直至越过柱面最大迎流截面之后，才从圆柱面上分离，致使分离流的尾涡区变窄，绕流阻力降低。

The is related to the frequency dependent absorption cross section and the density and spatial distribution of atoms in the lower level of the transition. Position dependent 5P3/2 state densities had been combined with the collisional broadening rate 5P3/2 5S1/2 line due to both helium and cesium perturbers to yield the .The effective radiative rates of the Rb D2 line as a function of the He pressure PHe were obtained . The fluorescence intensity I780 of the 5P3/2 5S1/2 emission was measured simultaneously.

由于辐射陷获存在，有效辐射率是自然辐射率与透射因子（发射的光子在探测区域内没有被吸收的平均概率，它与吸收截面及激发态原子密度和空间分布有关）的乘积。5P3/2原子密度及其空间分布结合5P3/2 5S1/2跃迁线的碰撞增宽计算了透射因子，从而得到了不同He气压下，Rb D2线的有效辐射率。

And those collision cross sections may be determined by fitting the simulation results from experiment data. At first, we calculate the effective ionization coefficients/N and drift velocity Ve of pure gas to determine collision cross sections in this paper, and the calculated results are agreement with the experiment data.

本文首先建立单一气体电子崩发展的蒙特卡罗模拟方法，用得出的电子崩参数与实验结果比较的方法，计算单一气体的/N和漂移速度Ve，并与实验数据比较，以确定碰撞截面的准确性。

This paper deduces the accurate formulas for calculating the geometric characteristics of effective cross sections of members with welded H-shaped cross sections in gabled frames,and in order to simplify the calculation,presents the corresponding approximate calculation formulas.

推导了门式刚架中焊接H形截面构件有效截面几何特性的精确计算公式，为简化计算过程，给出了相应的近似计算公式。

Considering, it is limited the cross-reactivity displayed by a single HVR peptide. We designed to ligate several high reactive HVR1 genes, and the recombinant fused protein containing several HVRls would have the ability to cross-react with most of HCV infected sera, and could be an effective immunogen of HCV vaccine.

但我们认为通过一条肽获得的交叉反应毕竟是有限的，故设想如果能将几个具有高交叉免疫反应性的HVR1片断用基因重组的方法连接起来，可能会获得与绝大多数病人血清发生免疫交叉反应性的抗原，并为疫苗的研究提供真正有效的免疫原。

If we want to make an effective and rational study of national psychology and a cross-cultural study between national bodies, we must first of all define the basis on which to make the studies as well as the comparisons. Namely, we should define the equivalence which we can make a comparative study of or a cross-cultural study of on the basis of methodology by building a platform of researching the equivalences of different nations so that we can make the study of national psychology there.

要有效而合理地进行民族心理学研究、进行民族族体间的跨文化研究，就必须首先确定这种研究与比较赖以开展的基础，亦即在方法论上对可以进行对比研究或跨文化研究的等值予以确定，搭建一个研究不同民族的等值平台，在这个平台上开展民族心理的研究。

The result shows that the effective cross-link fraction of the cross-linkers in copolymerization gels is, in general, very low.

结果表明：共聚合成的凝胶网络中，有效交联分数普遍较低。

With considering of the risk, and through analyzing effective equations, the paper gains the generation company's supply curve and the power distribution company's demand curve of contract thus finds the effective bargaining section, and establishes the relations between the transaction capacity and price.

研究了双边合同谈判的动态形成过程。在风险规避的条件下，通过效用方程分析得到发电公司的合同供给曲线和配电公司的合同需求曲线，并确定了合同的有效谈判区间，从而建立了合同数量和价格的谈判关系。

The invention relates to a code device, which is characterized in that: the device safety storage section has a blank mark which comprises at least two conditions as effective and ineffective; when the blank mark is effective, the code device only can be logged in by the device initial user; and when it is ineffective, the code device can be logged in by other user without the initial user.

本发明提供一种密码设备，其特征在于：在设备安全存储区内设置一空白标志，该空白标志至少具有有效及无效两种状态，当空白标志有效时，密码设备只接受设备初始用户的登录，当空白标志无效时，密码设备不接受设备初始用户的登录，其它用户可以正常登录。

The article is elaborated in advocate when arrow plume line is being set inside switchyard, section puts car line amount and effective length consideration, with the system foundation of actor melt into offers new method and conclusion proposal, make design of arrow plume line more reasonable and effective.

本文阐述在主调车场内设置箭翎线时，分段存车线数量及有效长度计算，以系统优化为基础提出新的方法和结论建议，使箭翎线设计更为合理有效。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。