查询词典 stepwise

Hydrolysis,homolysis and oxidation are emphasized differently in stepwise thermal degradation.

PBO纤维是迄今耐高温性能最好的高聚物纤维。

Inelastic collision ; selective stepwise excitation ; fine-structure tran-sition cross-section ; senaitized fluorescence.

非弹性碰撞；选择两步激发；精细结构转移截面；敏化荧光

In order to introduce the formal techniques such as stepwise refinement, automatic transformation and testing based on formal specification to the multimedia field, we first present a powerful subset of Allen's interval algebra as the temporal specification language to multimedia program.

为了在多媒体领域中应用逐步求精、程序自动生成和面向形式规范的并发系统测试等形式化技术，本文首先研究一个表达能力足够的Allen区间代数的子集合，以它作为多媒体对象时序关系的描述语言。

The adsorption equilibrium constants K1 and K2 were calculated by the isothermal equation of surface stepwise ion exchange.

用分级离子交换等温式求出了平衡常数K1和K2.pH值是影响吸附作用的主要因素，随着pH值的增大沉积物与稀土离子的交换吸附作用相应增强。

Stepwise regression analysis was used to build mathematical model of radial keratotomy, for analyzing factors influencing on the result, and predicting the RK result.

本文运用逐步回归方法建立放射状角膜切开术预测系统的非线性数学模型，分析各因素对手术效果的影响。

Results of stepwise discriminant analysis indicated that at Datang the key factors affecting habitat use by hoolock gibbons in spring were two factors, and that there were three factors (distance to open field, average height of bamboo and liane density) impacting habitat use by hoolock gibbons between Nankang and Datang in spring.

判别分析结果显示，在大塘影响白眉长臂猿春季生境利用的关键因子是藤本密度和坡度2个因子；影响赧亢与大塘白眉长臂猿的则是距空旷地距离、竹子平均高度和藤本密度等3个因子。

Based on intensive observation and measurement to the characteristics of tissue anatomical structure of some tree species, the relation of anatomical structure of tree species and their resistance to longicorn beetles was studied systematically with stepwise regression analysis.

作者中文名：刘晶岚；温俊宝；马履一；谢琛；吴彤；田海燕；罗彦文摘要：该文通过对9种树种组织解剖结构特征的观测，运用逐步回归方法，分析了树种解剖特征的差异与天牛危害之间的关系。

The maj or obj ect of this paper is the medium.small size concrete dams that have been used for many years.They have the characteristic that the alteration of water height of reservoirs is unobvious and the dams, displacements are affected mainly by temperature.With a case,the method of stepwise regression is used to analyze the vertical displacement prototyDe observed data.Then regression equation is established,the relation of dam,s displacement with hydraulic pressure、temperature、time effect is analyzed and the displacement change rule is obtained,the dam'S displacement onlv dependent to temperature is received.According to the theory of Finite Elements Method,the quasi-stationary temperature field formula and temperature stress formula are deduced.The QTP program and TFEM3D program are written with FORTRAN.The same case is calculated through QTP program to solve the quasi-stationary temperature and through TFEM3 D program to solve the dam'S displacement and find tlle dam,s deformation rule.This rule is accordant with the regression,S resuIt.

本文主要针对运行期间库水位变化很小、坝体的位移主要受温度变化影响的中小型混凝土坝，结合工程实例，采用逐步回归的方法对垂直位移原型观测资料进行分析，建立回归方程，分析坝体位移与水压、温度、时效之间的关系以及位移变化规律，分析结果坝体位移只与温度有关，而基本上不受库水位变化和时效的影响；根据有限元原理推求了混凝土坝准稳定温度场公式和温度应力公式，利用FORTRAN语言编制出QTP准稳定温度场程序和TFEM3D位移场程序，对大坝的温度场和位移场进行计算，求出坝体结点的变温值和坝体结点位移值以及单元应力分量，分析得到大坝的变形规律与实测资料以及回归统计变形规律一致，说明对坝体准稳定温度场的研究是正确的。

Sample data were selected by standard deviation law and factor variables were selected by the method of principal components analysis, stepwise and enter regression analysis. The forecast precision of the model is 87.35%.

样本数据筛选采用标准差法，因子变量筛选采用主成分因子分析法、多元线性回归的逐步回归和强行进入法等方法，建立的多元回归模型预测总体精度达到87.35%。

Topics covered by this course are:(1) Simple linear regression,(2) Inference based on fitted regression model,(3) prediction based on fitted regression model,(4) Application of simple linear regression,(5) Verification of regression assumption,(6) Multiple regression,(7) Qualitative independent variables,(8) Multicollinearity, and (9) Stepwise regression.

课程内容包含：（1）简单线性回归；（2）回归模式适合性的推论；（3）利用回归模式的预测；（4）线性回归的应用；（5）回归模式假设条件的检定；（6）复回归模式；（7）质量性独立变数的处置；（8）共线性的探测；与（9）逐步回归分析法。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。