参数方程

According to the analogy between structural mechanics and optimal control, the critical parameter γ-2cr corresponds to the fundamental eigenvalue of a generalized Rayleigh quotient.

按照结构力学与最优控制的模拟关系，Riccati方程解存在的临界参数γ-2cr对应于广义Rayleigh商的一阶本征值。

The constants in regression equation could be well defined and the calculated results were acceptable.

回归方程中的常数具有明确的物理意义且可以通过实验数据计算出参数。

Non-linear regression technique was used to estimate the parameters k and n of semi-empirical Page s equation Eq.

非线形回归技术被用来估计参数K和N的半经验一页S方程（等式（ 1 ））对于给定干燥条件（表1 ）和健身显示在图。

Introduced a different strategy for estimating the working correlation so that the estimator always existed, and, even if the correlation was misspecified, the regression estimator remained optimal within the assumed family.

这一思想的好处是不用直接估计工作相关阵中的多余参数，而是利用广义矩估计的思想建立估计方程。

For a seemingly unrelated regression system consisting of m equations, we propose a new type of estimator called pre test ridge regression estimator by combining the idea of preliminary test and ridge regression methodology and establish some statistical properties of PTRRE.

对于由 m个相依线性回归方程组成的线性回归系统，本文作者基于岭回归估计和预检验估计，提出了回归参数的一种新型估计，即预检验岭回归估计。并讨论了它的统计性质。

First, based on the analysis of the grid Reynold number, the necessity for adopting high order scheme is emphasized when there is the complex flows with strong separation and high parameters gradient regions. Then, according to the entropy increased condition, the third order ENN scheme is constructed. Meanwhile, a fast, effective, and simple implicit numerical method called hybrid flux splitting method is developed. After that, the one dimensional model problem with many extrema and Burgers equation are simulated. Through the comparisons with exact solutions, the accuracy and effectiveness of the ENN scheme are confirmed.

首先通过对网格雷诺数的分析，论证了在求解含分离及较大参数梯度的流动时，采用高阶格式的必要性，然后从熵增原理出发，提出了建立三阶ENN格式的准则，同时发展并建立了一种快速、有效的简单隐式算法"混合通量分裂法"，通过对一维模型问题及Burgers方程的数值试验，检验了三阶格式的计算精度。

The obtained result only needs to solve a modified Riccati equation with two scale parameters.

结果仅需求解一个含有两个尺度参数的修正代数Riccati方程。

The obtained result only needs to solve a single parameter dependent Riccati equation.

结果仅需求解一含有一个尺度参数的Riccati方程。

First, one root of the N-order nonlinear equation is derived with the Aitken iterative method.

LSP参数可以通过求解一个与线性预测系数相关的非线性N阶方程得到。

In order to reach the high-G resistance, finite element analysis is carried out to optimize the size of fuse safety mechanism. The dynamic equations of fuse safety mechanism are established.

对微引信保险机构进行了有限元分析，得到了满足高过载条件的尺寸参数，建立了保险机构的动力学方程，时发射时解脱双重保险的可靠性进行了仿真验证。

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。