查询词典 classification

In degraded PSM matching classification, errors modification method of degraded PSM is presented and the matching tensor of every canonical scattering centers is given. In Chapter 4, the theory of wideband millimeter-wave radar target identification is introduced. It is indicated that, for HR radar target identification, description of temoral relations among features and pattern recogntion adaptive to variation of target angles are of key importance. A rule-based pattern recogniton method of sequential reasoning is proposed, which uses a series of rules to describe relations of features variation caused by target angles variation and has the advantages of adaption to unrandom variation and false probability control in classification over traditional statistical pattern recognitiop method. Feature extraction is crucial step in target identification. In range profiles identification application, features are extracted by means of range domain pre-processing algorithm, spacial and amplitude visual computation directly from range profiles and transform algorithm based on range profiles. Visual or transformed features are either sufficiently convinced or necessarily convinced and both of them are effective and robust to range profiles identification.

在第四章，首先对宽带毫米波体制背景下目标识别方法的一些特点进行了阐述并指出，在毫米波雷达目标识别中，特征之间动态关系的描述以及能适应目标姿态角变化的模式识别方法的研究乃是要解决的关键问题；进而提出了一种基于规则库的序贯推理模式识别新方法，在这种方法的研究中，主要包括序贯推理规则库的规则排列与特征选用顺序以及规则库的收敛等问题；这种方法克服了传统的统计模式识别方法特征利用效率不高、难以适应特征值的非随机性变化的缺点，把姿态角变化所引起的特征的变化用一系列规则加以表示，其优点是能适应特征值的非随机性动态变化，并能控制分类过程中的差错概率α；特征抽取是目标识别中的关键步骤，在基于目标距离像的特征抽取方法研究中，提出了距离空间域的预处理算法、距离空间域与幅度域的直观特征抽取方法以及基于目标距离像变换分析的特征抽取方法。

A character-codes model based pattern recognition method by using amplitude data of targets frequency response is proposed after the establishment of high frequency response equation of radar targets. The method uses the same unvariant character-codes to express the same target of different angles and uses sequential separating of regions of target's reference variables to obtain multiple coding vectors of all regions for every target. The category and pose of target can be determined after a two-staged classification processing such as coding processing of target range profile data and errors correcting processing of coded data. The two-stage classification results are used to target identification as posterior hypothesis to be tested by sufficient convincing and necessary convincing. The character-codes model based pattern recognition method is also adaptive to variation of target angles and controllable in error probability. Time-consuming and complicated iterative computation is not necessary in the train process of pattern recognition.

首先建立了雷达目标的高频频率响应方程，这种方程将目标多散射中心理论与目标局部谐振理论有机地结合起来；进而提出了目标多频响应结构成像方法，这种方法将瑞利区频率响应或谐振区频率响应曲线的不同部位用各种不同的近似方法去逼近，通过特征谱估计方法将目标的局部频响特征与宽带距离响应特征结合起来；然后提出了一种基于姿态角变化区域的序贯划分与多模匹配的特征编码识别方法，这种方法具有能适应目标姿态角的变化以及能控制识别的差错概率α等优点，在目标识别时只需要目标在少数有限个频率激励下的幅频响应数据。

This paper introduce the classification algorithm of using decision tree ,and to compare and e- valuate for the various decision tree classification algorithm.

介绍了利用判定树分类的算法，并对各种判定树分类算法进行比较和评价，在此基础上提出判定树分类算法的改进方向。

He founded the dual classification, the Chinese school of the classification of flower varieties, established gene pools of golden camellias and tested out a successful breeding technology. With the wild flowers of China as the parents and through wild breeding, he nurtured new varieties of golden camellias, Chinese roses, and groundcover Chrysanthemum with anti-stress and ornamental properties. He is the authority of the international registration of Mei cultivars.

他创立了花卉品种分类的中国学派——&二元分类法&；建立了金花茶基因库，试验出一套成功的繁殖技术；以我国野生花卉作亲本，通过&野化育种&，培育出具有抗逆性与观赏性的金花茶、月季和地被菊等花卉新品种。

Except in the higher echelons, extensive classification has no place in the classification of vegetation.

除高阶类级之外，外延分类在植物分类中还是没有地位的。

This article took the materials importance;urgency and scarcity as the classified criterion, put the velues after being fuzzed as the input of PPSVM, selected the classification which is corresponding with the Max Posterior Probability as the output , the results of the classification are obtained finally .

把物资的重要性、时效性和缺口程度三个因素作为物资需求分级的评价标准，将模糊化后的评价值作为PPSVM的输入，选择后验概率最大所的类别作为测试样本的类别输出来完成整个分类过程，从而得到对应的分级结果。

The experimental result indicates that the post classification comparison based on Bayesian Network classification algorithm is a newly effective approach for remote sensing imageries change detection.

实验结果表明：基于贝叶斯网络分类算法的后分类比较变化检测方法是遥感影像变化检测的一种新的有效方法。

Data classification is an important task of data miming. To discover a high-performance, high-speed classification is one of key problems for data mining.

分类知识发现是数据挖掘的一项重要内容，研究各种高性能、高速度的分类算法是数据挖掘面临的主要问题之一。

The classification below reflects another traditional classification of cantes more based on rhythmic pattern, but also taking the origin into account.

下面的分类反映出另外一种建立在节奏型基础上却也考虑了起源因素的刚代传统分类。

This will cause the final Pareto optimal frontier perform feature subsets with many features erasing and less improvement of classification rate. In order to improve the accuracy of classification, it is necessary to avoid the over trimming of the features. In this study, we propose a constraint based niched Pareto genetic algorithm to adjust the thread of search.

由於在实际问题中，提升分类准确率，常常会比大幅删减使用特徵数来得重要，本研究提出限制型利基柏拉图基因演算法，透过在基因演算法的挑选过程中，增加一准确率限制的手段，调整基因演算法之搜寻方向，以避免特徵的过度删减，并确保分类准确率的提升。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。