变量

Willingness to pay is chosen as dependent variate in this study, while the independent variates are some demographic variates and values (the reasons for this option are described in the article).

在文献阅读、市场调查和思考的基础上，本研究选取空调为典型产品加以考察，选取支付意愿为因变量，选取一些人口统计变量和价值观变量为自变量。

Chapter two proposes the unified form of Hojman"s conservation law and Lutzky"s conservation law. Firstly, the author introduces the general Lie group of transformations that the variations of both the time and the generalized coordinates are considered, derives the determining equation of Lie symmetry for the system, presents a new conservation law, which contains the Hojman"s and the Lutzky"s conservation law as two special cases, and obtains a condition to exclude trivial Hojmans conserved quantities.

第二章，Hojman定理和Lutzky定理的统一形式：首先，引入一般意义下的Lie变换群(即位型变量q_s和时间变量t同时变换)，给出系统的Lie对称性确定方程，提出一个新的守恒律，Hojman定理与Lutzky定理则分别是这个新守恒律在两个特殊情况下的推论，导出一个可排除平凡Hojman守恒量的定理，并分别讨论了Birkhoff系统和非完整系统的Lie对称性和Hojman守恒量，最后，讨论了Hamilton系统的梅对称性与Lie对称性的关系，给出了由梅对称性求Hojman守恒量的方法。

Finally,the correlation analysis was used for continuous variables andvariance analysis for dichotomization variables to analyze and check the factors' influence of declining scores of behavior scale.

对于连续型变量采用相关分析，对二分变量采用方差分析检验各因素对行为量表减分的影响。

The concept of topology optimization of truss structures with discrete variables including two kinds of variables and the relative difference quotient algorithm for discrete optimization are extended to the topology optimization of plate and shell structures composed by plate and shell elements.

将包含两类变量的桁架结构拓扑优化设计的概念及求解离散优化的相对差商法进一步推广到由板壳单元组成的板壳结构的拓扑优化，建立了包含两类变量的板壳结构拓扑优化设计模型，并采用相对差商算法进行求解。

If someone analyses a large dataset for long enough, they are bound to find a statistically significant effect or difference between some set of variables.

如果说分析一个大数据组的时间足够长，他们就肯定可以找到某些变量在统计学上具有的显著效应，或者不同变量组之间的差别。

Differential Algebra related to the idea of AC = BD are presented firstly in chapter two.

最后提出了C-D分离变量的概念，予以形式分离变量法新诠释。

Next, what have double input and variable of 2 dimension appearance in the light of a kind is nonlinear system, used opposite curvature concept and curve to design controller of contract of appearance of 2 dimension plane by basic theorem, the curve of contrail of appearance be accusinged that controller of contract of this kind of appearance can assure a system and referenced contrail curve have identical figure.

梗概： 针对一般控制系统，利用微分几何中的曲线理论提出了外形变量、被控外形轨迹曲线和外形合同控制等概念。然后，针对一类具有双输入及二维外形变量的非线性系统，利用相对曲率概念和曲线论基本定理设计了二维平面外形合同控制器，这种外形合同控制器能够保证系统的被控外形轨迹曲线和参考轨迹曲线具有完全相同的外形。

Then it is often possible to reduce the dimensionality of the data without losing important information.

这时可以只选择有助于问题求解的变量而不考虑其余的变量，从而减少了数据的维度。

Finally, the impact of some demographic variables and organizational variables on each dimensionality was discussed.

最后，本研究还探讨了一些人口学变量和组织变量对师徒关系各维度的影响。

The number of packet s generated by users in a segment of time is a discrete random variable whose distribution varies with situation.

在一个时段内用户产生的信息包数是一个离散的随机变量，对于不同的情况该随机变量有不同的分布。

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。