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Correlation between fillet yield and ratio of two body measurements was higher than the individual variables, especially in male fishes.

对可量性状之间的比值与出肉率进行相关性分析，相关系数普遍比单个性状高，特别在雄性个体中表现明显。

The model takes into account the flow and physical property characteristics of the systems as well as geometric variables such as corrugation angle.

根据质量和动量守恒原理，考虑下降液膜和气相的相互作用、系统内气液两相流动、物性特征以及填料结构参数对压降的影响，提出了填料塔内规整填料的压降模型。

The maximum principle of the optimal control for the stochastic systems described by Zakaj stochastic partial sifferential equationis proved by approximately minimum point theorem of E. Ekeland. The convexity and compactness of the set of control values is not assumed, and it is not necessary for the maximum principle about differentiability in control variables included in drift term of the stoch astic system and the integrand in index functional, and costate process satisfies the stochastic partial ...

在不假便定控制变量取值的集合是凸的和紧的，不要求随机系统的漂移项和指标泛函的被积函数关于控制变量具有可微性的情况下，用E，Ekeland的近似极小点定理证明了Zakai随机偏微分方程描述的随机系统的最优控制的最大值原理，和用很简洁的方法证明了协态过程满足一个随机偏微分方程。

As a result, it shows thatthe static or dynamic subsystem optimum alone is not equal to the system optimum. Three initial value problems met in the optimal design of flying vehicle are studied andconclusions are derived that: orthogonal test method can be adopted to decide the initial valueof static optimization problem, some mathematical techniques can be used to deal with thecostate variables of Maximum Principle and decide the initial value of the costate variable,the indirect method can be used to get the analytical solution under ideal case to guide thechoice of the initial control curve in the direct method. With some numerical examples oftrajectory optimization, it shows that all these methods are useful not only in accelerating theconvergence but also in converging to the global optimum.

针对飞行器优化设计中的三种初始值问题进行了研究，以远程弹道导弹弹道的工程优化为例说明，对于静态优化问题，采用正交试验法选取初始值，不仅可以大大加快收敛的速度，而且更有可能收敛到全局最优解；以气动力辅助变轨问题为例说明，用共态变量的一阶泰勒级数展开可以解决极大值原理中共态变量初值难于确定的问题；以二级弹道导弹的主动段弹道优化为例说明，利用间接法在理想情况下得到的解析解来指导直接法初始控制曲线的选择，将大大有利于提高直接法的收敛速度。

For the value of n given 4m-3,the author uses the propositional transformation,the counterevidence and one-to-one correspondence between variables and the value of the functionso to prove the validity of Erds conjecture.

对于n为4m-3形的奇数，文章采用命题转化法及反证法，并用自变量与函数值的一一对应关系证明了Erd■猜想成立。

It is a hot research topic to eliminate irrelevant variables from counterexample, to make it easier to be understood.

使用反例压缩算法，从反例中剔除冗余信息，从而使反例易于理解，是目前的研究热点。

According to the concept of space-vector ,the method to deal with system coupling variables is analyzed in detail.

采用空间矢量的概念，对系统耦合量的处理方式进行了详细分析。

This project derives a general express of experiential covariance function, which is the basis of achivement of interpolation, extrapolation and continuation of local gravity field variables and estimation theirs at different heights.

提出局部重力场元经验协方差函数的通用表达方法，为实现局部重力场元的内插、外推、延拓或其他不同高度的重力场元估计一体化奠定理论基础。

Traditional multivariable analysis method, for example, principal component analysis method and factor analysis method, are common in calculating the mean vector, the covariance matrix of sample and other variables.

摘要传统的多元统计分析方法，如主成分分析方法和因子分析方法等的共同点是计算样本的均值向量和协方差矩阵，并在这两者的基础上计算其他统计量。

As an example, the ANOVA model with covariant variables is considered. The generalized p-value of this model is given, and then the critical region is proposed.

作为例子，又考虑了具有协变量的ANOVA模型中等均值假设检验问题，给出了其检验问题的广义p-值。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。