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The DC reactive power is the only parameter to be specified in calculation, and the partial differential formulas in Jacobian matrix do not change when the DC control model changes.

计算时，只需规定换流器直流侧的无功功率，而且当直流系统控制方式发生变化后不需重新推导Jacobian矩阵中的偏导公式。

I have calculated the species diversity for 3 layers (i.e. tree layer, shrub layer and herb layer) by means of various biodiversity index formulas and analyzed the relative species abundance using 9 models of the probability density distribution functions, such as, 3 Distribution (or Beta Distribution, Weibull Distribution, Lognormal Distribution, Poisson Distribution, Binomial Distribution, Negative Binomial Distribution ,Geometric Distribution, etc.. chi-square analyses were conducted on species distribution by using the chi-square test formulated by Pearson to test which distribution function is better, the result of chi square test made it possible to reject the other 8 distribution functions, theβdistribution function performs better than other probability density functions, it has a very close approximation, which can be used for the description of relative abundances of species in forest communities in this data set.

在相对多度研究上选用了九种概率分布模型，这九种概率密度分布函数依次为：贝塔分布、Weibull分布、对数正态分布、泊松分布、二项分布、负二项分布、几何分布、对数分布和奈曼A型分布，并进行了严格的卡方检验，结果表明：其它八种分布均被遭到拒绝，只有贝塔分布获得了通过，且拟合的结果非常理想。

In this paper the problem of rationa1 regulation in penstock of the mixed- flow water turbine is studied, comparative1y simple and exact computation formulas are given, together with concrete examples.

本文研究了混流式水轮机管道水锤压力的合理关闭规律问题，给出了较为严格的、简便的计算公式；并附有实例。

The first is a direct request using the explicit performative utterance formulas.

第1个是直接的请求使用外在的述行语表达公式。

The value of the Wiener Index for a class of linear phenylene molecular graph is calculated, and the linear recursive formulas is obtained, and then the exact expressions are gained by solving some difference equations of the recursions.

文章给出了一类一般线性聚亚苯基图hQ的Wiener拓扑指标的线性递推公式，通过求解差分方程而得到了它的Wiener拓扑指标的精确表达式。

A value of the Wiener index for a class of linear phenylene molecular graphhM is calculated, and a linear recursive formulas is obtained, and then a exact expressions is gained by solving some difference equations of the recursions.

给出了一类一般线性聚亚苯基图hM的Wiener拓扑指标的递推公式，通过求解差分方程而得到了它的Wiener拓扑指标的精确表达式。

Based on the non-linear system and in the light of the characteristics of piecewise linearization of the bumper performance curve in the calculation of train coupling s,the calculation formulas are re-deduced by use of the basic principles of Newmark-β method.

基于非线性系统，针对列车连挂计算中缓冲器特性曲线分段线性化的特点，利用Newmark-β方法的基本原理重新推导计算公式，改进了传统的Newmark-β方法，改善了算法的稳定性，减小了计算误差，使之适用于列车连挂的计算。

In fact, German pietism was but one chord in a symphony of variations on a common theme, the need to move beyond sterile formulas about God to a more intimate experience with him.

事实上，德国的虔诚主义是一个和弦，但在交响乐的变化对一个共同的主题，必须超越育公式上帝更亲密的与他的经验。

Based on failure model of brick masonry walls and truss bar model of fiber reinforced polymer, the formulas of shear capacity of brick masonry wall with pilaster strengthened with GFRP are established, which agree well with the experimental results.

基于未加固墙体的剪摩和剪压破坏模型和纤维复合材料的桁架受力模型，推导出在不同破坏形态下，GFRP加固带壁柱砖墙的抗震抗剪承载力理论计算公式。利用公式所得的计算结果与试验结果吻合。

I hope you like arithmatic because you'll need advanced mathematics knowledge for setting up formulas, pivoting and charting of data.

我希望你喜欢的除数，因为你需要高等数学知识，设立公式，旋转和制图数据。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。