逐步法

逐步法合成杯[4]芳烃关环反应的改进

The Improvement of the Cyclization Step in the Stepwise Synthesis of Calix [ 4 ] arenes

收率为80%，与逐步法相比（69%×85%）收率提高21%。

Reaction yield , as 80 % , is 21 % higher than the step by step way , which is 59 % .

同时引入了一个用来求解该模型的算法&逐步法，并探讨了该方法中满意目标的选择与最大宽容值的确定。

Subsequently , an algorithm named Step Method is introduced to solve the model , and the choice of satisfactory goal and the definition of maximal allowance value are also discussed .

基于逐步回归法的IPO动态定价模型及实证研究

The Empirical Research on IPO Dynamic Pricing Model Based on Stepwise Regression Analysis

Cox逐步回归法分析影响预后的因素。

Cox stepwise regression model was used to detect prognostic factors of survival .

Bayes逐步判别法在绿茶板栗香化学识别上的应用

Application of Bayes Stepwise Discrimination Analysis on Chemical Recognition of Green Tea with Chestnut-like Aroma

运用逐步判别法和Logistic函数判别法，对所得的模型参数进行了心功能优劣的判别分类；

We also used stepwise discrimination and Logistic Function discrimination to classify and discriminate the model parameters by heart function condition .

一种基于QR分解的逐步累积法传感器配置

Successive Sensor Placement for Modal Paring Based-on QR-Factorization

采用纽马克（Newmark）逐步积分法求解运动微分方程，按照瑞利（Rayleigh）阻尼确定阻尼矩阵。

Newmark time integration method incorporating a Rayleigh damping is used to solve the equation of motion .

针对上述两种方案，基于逐步回归法选取了回归变量并分别在X、Y、Z三个方向建立了热误差预测模型。

Aiming at the two proposals that are discussed , the regression variables are selected by stepwise weakening and the thermal error models are established in three directions .

当逐步回归法的前提条件不具备时，可考虑采用GM（1，n）灰色模型或广义线性模型。

If the premise condition to apply the step regression method is not satisfied , we can use GM ( 1 , n ) grey model or general linear model .

方法：1.用逐步回归法，建立cox模型，对cGVHD的多因素变量进行危险因素分析。

Methods 1 . Cox proportional hazard regression model was used in multivariate analysis .

采用多元逐步回归法分析炎症因子与FMD的关系。

Stepwise regression was used to analyze the correlation between inflammatory factors and FMD .

应用非条件logistic回归模型进行单因素分析，将单因素分析有统计学意义的变量纳入到多因素logistic回归模型中，采用逐步回归法筛选变量。

The logistic regression model was used to analyze the single factors and multivariate analysis was used during stepwise regression for statistically significant variables in single factor analysis process .

文章以一跨线污水管碰接工程为例，简要介绍了小口径PVC塑料管的一种特殊的顶管施工方法&逐步扩孔法。

This article mainly discusses a special technique of enlarging excavation step by step according to an example of the intersection construction of small-diameter plastic sewage PVC-pipes crossing roads .

采用Newmark逐步积分法求解动力平衡方程，并编制了相应的计算机程序。

The dynamic equilibrium equation is solved by Newmark method , and the responding computer program is coded .

用倒数方程法来求得系统的COD稳定去除率，利用逐步回归法，建立了人工快速渗滤系统的主要设计参数与COD去除率之间的多元线性回归模型。

The stable removal rate of COD was obtained by the reciprocal equation method , and the model of multi-linear regression equation was established by stepwise regressive method .

用EDTA冲洗根管，逐步后退法预备根管，严密充填根管，可以获得良好的治疗C形根管系统的效果。

We can also gain satisfactory therapeutic efficacy of C-shaped root canal by using EDTA to clear root canal , preparing root canal by step-back technique , filling root canal firmly .

通过logistic逐步回归法成功建立肾虚血瘀证的诊断模型，预测准确率可达到93.7%。

Succeed to to set up the diagnosis model on type of Kidney Deficiency and Blood Stagnation by logistic stepwise regression , the prognostic accurate percentage achieves 93.7 % . 4 .

基于Gurtin变分原理的非时间步参数逐步积分法

A non-time-step - parameter direct integration method by Gurtin variational principle

基于Gurtin变分原理的一种逐步积分法

Step by Step Integration Method Based on Gurtin Variational Principle

最后，提出了具体的智能化算法，基于BP网络的结构健康状态的诊断方法&分层逐步识别法。

Finally , a detailed and intelligent solution is proposed for diagnosing the health condition of the structure , which based on BP neural net-the method identified step by step , combine with a numerical example .

基于位移型Gurtin变分原理计算动力响应的逐步积分法

A step by step integration method for dynamic response by Gurtin variational principle

通过对名义数据和有序数据的相关性分析，我们首先找出影响大学生作弊的因素，然后用逐步回归法和Logistic回归模型得出影响大学生作弊的主要因素。

Using correlative analysis about nominal and order data we found the main factors of cheat in the tests in the University of Science and Technology . Then we got the key factors by Logistic modeling .

采用多元逐步回归法建立了揭示模型线性关系的QSAR模型，对模型进行稳定性检验，并采用样本集外的化合物对所建立的QSAR模型进行预测；

The QSAR model was built with the multiple linear step regression method , and it was tested for the stability with other sample compounds .

编制Fortran程序，以逐步破坏法为基础，根据有限元法计算出的加筋板单元应力应变结果，可以用来计算船舶与海洋工程等箱型梁结构的极限强度。

The Fortran program is also complied to calculate the ultimate strength of the box girder structure based on the results about stress-strain relationship of stiffened panels calculated by FEM .

目的分析多种因素对根管治疗术的影响。方法追踪观察212例根管治疗术的患牙，通过SAS统计软件，采用LOGISTIC向后逐步回归法。

Objection To study the effect of many factors on root canal therapy ( RCT ) Methods 212 patients with RCT were retrospectively observed , then were analyzed with logistic regression in SAS statistical software .

主要应用多变量AR模型时序法和分段时序法，多变量AR模型时序法利用逐步最小二乘法和SBC准则定阶和参数估计；

Analysis of a multivariate autoregressive process deals with the estimation of the parameters by stepwise least squares method and the order of the AR process is determined by a new criterion function SBC .

综合分析结果表明，黄芩核心种质构建最佳方法为最小距离逐步取样法（LDSS）。

Comprehensive comparison showed that of least distance stepwise sampling ( LDSS ) is the .

然后，在实证研究阶段，结合单因素分析和其他学者的研究结果本文提出13个实证研究假说。采用逐步回归法，建立了多元回归模型，对IPO抑价程度的影响因素进行了多因素分析。

Secondly , in the part of empirical study , after one-factor analysis , we propose 13 hypotheses , use stepwise method to establish the multi-dimensional return model and do multi-factors analysis about the influence factor of IPO underpricing .