参数方程

As an additive N-way classification model is fitted to the data, the structure of the coefficient matrix of reduced normal equation obtained by eliminating the parameters of the other factors is discussed.

当对由实验所产生的资料配适具相加性的N-方式分类模型，我们讨论消去与其他因子有关的未知参数所获得之缩小的正规方程的系数矩阵之结构。

With 3 waxy maize varieties and a normal maize variety as the tested material, the Logistic equation was used to fit the grain filling process so as to analyze the relationship between the a series of filling parameters and days after pollination and compared the grain filling characteristics of normal maize and waxy maize.

方法］以3个糯玉米品种和1个普通玉米品种为试验材料，用Logistic方程拟合籽粒灌浆过程，分析一系列籽粒灌浆参数与授粉后天数的关系，比较普通玉米与糯玉米的籽粒灌浆特性。

Based on the one-dimension two-phase drift flow model, the simulation of system characteristic under HTRL-5 condition was performed.

基于一维两相四方程漂移流模型，采用数值模拟的方法对5MW低温核供热堆热工模拟回路（HTRL-5）的自然循环进行模拟，分析在自然循环系统中存在的分岔特性及其参数效应。

Based on the axial symmetric N-S equation of compressible liquid, we establish the onflow model to simulate convergent nozzles' free jet with different internal parameters by using structural grid and finite volume of quadratic precision.

建立了会聚型喷嘴的湍流模型，根据可压缩流体轴对称N－S方程，采用结构网格和二阶精度的有限体积法，对不同内部形状参数的会聚型喷嘴自由射流进行了数值模拟。

Calculate way 1: Inside it the parameters number have already known, the unknown X of the square equations , can pass to push the estimate of with following calculate way: Among them α=0.95 ～ 0.99 for forgetting the factor, mean the oushifan number, block diag to mean to divide an opposite angles matrix .

算法1：当中参数已知时，方程的未知数X，可用如下算法递推估计：其中α=0.95～0.99为遗忘因子，表示欧氏范数，block diag 表示分块对角阵。

A class of singularly perturbed boundary value problem of weakly nonlinear equation for fourth order on the finite interval with two parameters is considered.

讨论了一四阶具有双参数的弱非线性方程在有限区间上的奇摄动边值问题。

Usingquality and stability theory of ordinary differential equation discussed themathematical model.

利用常微分方程的定性和稳定性理论，根据参数值的不同情形对所建立的数学模型进行讨论，得出了一些新的结果。

On the basis of establishing the differential equations of motion of the pantograph and catenary system, the TSG3 pantograph has been simulated.

在建立弓网系统运动微分方程的基础上，本文对TSG3受电弓几个主要参数进行了模拟计算。

Based on the structure of a non-tracking internal-concentrator solar PV-thermal tube collector and the absorber design requirements, the optical design for the compound parabolic concentrator with half cylinder absorber is proposed to improve the solar energy efficiency. Matlab software was used for the optimization and simulation of the concentrator curve and shape. The curve equation of concentrator for maximum incidence of light of the collector was obtained; and the installation locations for CPC/half cylinder absorber and the necessary CNC processing parameters were optimized.

针对非跟踪内聚光光电－光热复合管的结构及接收器的设计需求，对管内具有特殊形状的半圆柱接收器的复合抛物面聚光器进行了光学设计，并利用Matlab软件对聚光器曲线和形状进行了优化与数据仿真，得到了光热复合管能够得到最大入射光的聚光器的曲线方程、安装位置以及供数控机床加工所需的参数，给出了不同入射角的光线和光强分布图，提高了太阳能的利用率。

Critical parameter ; evaluation method ; group contribution method ; Racektt equation

临界参数；估算方法；基团贡献法； Rackett方程

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。