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Firstly, a dynamic reduction method, which integrates genetic algorithm and resample technology, is introduced. Then dynamic reduction method is used to get reduct sets that have stable and good generalization ability.

首先，通过结合遗传算法求约简和重采样技术介绍了一种动态约简方法，通过动态约简方法可以获得稳定的、泛化能力较强的属性约简集。

The relationship between torque and temperature was investigated with a rheometer and dynamic mechanical property was analyzed by dynamic mechanical thermal analysis.

用硫化仪考察了不同温度下材料转矩随时间的变化情况，并对材料的动态力学性能进行了分析。

A dynamic rill erosion model is established according to the dynamic theory of sedimentation and soil erosion.

根据泥沙运动力学及土壤侵蚀学的基本理论和知识，建立了细沟侵蚀的动力学过程模型。

Three-dimensional dynamic finite element methods and theories , improved the Ritz vector method and vibration shapes superposition method are applied to analyze and calculate the dynamic response of drilling string.

本文采用三维动力有限元理论方法和改进的Ritz向量法及振型迭加法对钻柱进行了动力响应分析和计算。

The theory studies have showed that, rock burst is a kind of dynamic phenomenon of mining rock, and is a kind of dynamic disaster coming from mining.

理论研究表明，冲击地压实质为一种矿山岩体的动力现象，是矿山开采带来的一种动力学灾害。

A new dynamic finite element method for dynamic analysis of frame structures considering the effect of rotatory inertia and of shear deformation is presented in this paper.

在本文中，作者提出了一种可以考虑梁单元剪切变形和转动惯量影响的框架结构动力分析的动态有限元方法。

The combinations of 0.018 inch stainless steel round wire and all brackets produced significantly the lowest static and dynamic frictional resistance than that of other archwires . The 0.019× 0.025 inch stainless steel rectangular wire produced the highest static and dynamic frictional resistance combined with all preadjusted brackets combinations .

在4种弓丝中，0.019× 0.025英寸不锈钢方丝动、静摩擦力最大，0.018英寸不锈钢圆丝的动、静摩擦力最小，两者之间有显著性差异；0.020英寸不锈钢圆丝与0.019×0.025英寸不锈钢方丝之间无显著差异。

Based on physical and psychological theories of driver's dynamic vision, combined related research methods and conclusions in home and abroad, the basic modes and characteristic parameters of driver's visual behavior were discussed systemically. Several indexes were determined as basic characteristic parameters of dynamic visual search mode, including fixation duration, visual angle, visual search scope, saccade amplitude and saccade velocity.

在驾驶员动态视觉生理学和心理学理论的基础上，结合国内外相关领域的研究方法和研究结论，对驾驶员视觉行为的基本形式和表征参数进行了系统的论述和分析，确定以注视持续时间、视角、视觉搜索广度、扫视幅度和扫视速度几个指标作为动态视觉搜索模式的基本表征参数。

It is shown that the effect of dynamic thermal tensioning by trailing intensive cooling is greatly influenced by the heat-dissipating conditions of the fixtures.Without uniform preheating it is difficult for trailing intensive cooling alone to create a saddle-shaped temperature field and the mechanism of reducing distortion is equivalent to the decrease of welding heat input. While combined with uniform preheating ,dynamic thermal tensioning comes into being to some degree and the effect of reducing distortion increases obviously.

研究表明，由随焊激冷造成的动态温差拉伸减小焊接变形的效果受夹具自身散热条件的影响较大：不采用整体预热时，难以造成马鞍形温度场，此时减小焊接变形的机理主要是焊接线能量的等效降低；采用整体预热后，能够造成一定程度的温差拉伸，减小焊接变形的效果明显提高。

Low speed principle of closed - loop system , it can be concluded that the existence of the difference between static frictional and dynamic frictional torque , and the periodic saltation of the dynamic frictional torque , are the main reasons of the low speed stick - skip to the electrohydraulic position servo system

针对伺服马达的低速性能，进行了低速实验研究，并兼顾快速性能进行了阶跃响应和正弦响应实验研究，对实验结果进行了分析，得出了一些有价值的结论，提出下一阶段进行实验的建议。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。