分类

For the first one, it is a way that merge the traditional unsupervised classification methods and supervised classification methods.

在基于光谱特征的分类方法中采用了传统的非监督分类方法和监督分类方法。

Finally, the ideas of principal component analysis and support vector machine can also be used to document classification, the results of simulation is discussed.

在此基础上，提出了一种Web文档分类的基本框架，分析了用于文档分类的降维技术，给出了基于主分量分析和支撑矢量机的文档分类的基本思想，分析了仿真实验的结果。

Many polarimetric target decompositions were explored, and support vector machine was applied to the classification of polarimetric SAR image. A new algorithm of target classification was presented based on polarimetric target decomposition and support vector machine. Finally, the effect of classification results was discussed by selecting different kernels and different parameters.

五系统地对各种极化目标分解方法进行了深入的探讨，并应用支持向量机对极化SAR图像进行分类研究，提出了一种基于极化目标分解和支持向量机的目标分类算法，并通过选择各种类型的核函数以及不同的参数，探讨其对地物目标分类结果的影响。

It firstly presents a survey of basic concepts and knowledge. Then it analyses the representation effectiveness of Vector Space Model and factors influencing the classification performance.

本文主要从文本表示及分类算法两个角度展开了深入的研究，首先对文本分类的基本概念和知识进行了归纳，分析了目前最为流行的向量空间模型的表示效力以及它对于分类效果的影响因素。

Firstly, the target vector is transformed to the state with minimization of cross-polarization; then the parameters u/v/H are used to characterized scattering mechanism, and the fuzzy membership is adopted instead of "hard" division of parameter plan; finally, characterizing the coherency matrix as multivariable complex Wishart distribution, the polarimetric SAR image is classified based on Bayes maximum likelihood criteria.

该文提出了一种新的非监督分类算法，该算法首先根据去取向理论，将目标向量旋转到最小交叉极化方向；然后，采用u/v/H参数描述散射机制，以模糊隶属函数代替参数平面的"硬"阈值划分；最后，以多元复Wishart分布描述相干矩阵，基于Bayes极大似然分类准则进行分类。

In the zoological classification, the lowest-ranking group of taxa the names of which are regulated by the Code.

在动物分类中，其名称受本规约规范而分类层级最低的分类单元群。

The following results are made from this research: Assessing data quality and band combination of different bands in line with geo-target features in desertification areas, and determining basic bands for desertification monitoring. And understanding and studying the spectral features and variation rules of geo-targets in the experimental area, raising that it is the basis of geo-targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo-targets, realizing that in a great extent spectral-integrated-form-based classification method can remove the phenomenon of "different spectrum with same objects" resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo-target with similar spectral forms and much different values of whole reflectionratio. It is suggested that "red edge" range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel-based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. The remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed.

研究结果如下：首先针对荒漠化地区的地物特征，对高光谱数据不同波段的数据质量、波段组合进行了评价，提出了适用于荒漠化监测的基本波段选择集；初步了解和掌握了研究地区的地物光谱特性及变异规律，进一步明确了掌握地物光谱特征和变异规律是用成像光谱仪数据提取地物信息的基础；发现了基于光谱整体形状的分类方法在很大程度上能够消除由于传感器、地物目标观测方向之间的角度变化引起的反射率曲线整体平移的&同物异谱&现象，对于谱形相似而整体反射率的值相差较大的两类地物，通过引入均值和方差图像参与分类得到解决；研究还表明在植被&红边&范围内的波段是进行荒漠化监测的主要特征波段，这些波段与植被生物量和盖度都有密切的关系，是开展精细植被分类研究和植被定量反演的重要基础；像元的导数光谱分析可以消除土壤背景的影响，是进行植被生物量和盖度定量反演的有力工具；建立了荒漠化监测主要评价因子的定量反演模型，并分析了模型的适用性。

The classification accuracy is approximatively the same in the test plots under identical classification conditions of the differential images.

相同判释标准探讨测试区差值影像分类结果；全体精度差异很小，但水稻生长期些许差异及地籍界线与丘块不吻合处，区块式分类法会降低分类准确性。

On the basis of the results obtained in the present study, the opinion on bamboo evolution were proposed:(1) Bamboos are monophyletic group,(2) Unicaespitose bamboo are not the original bamboo group,(3) Bamboos of genus Arundinaria are multiphyletic group, and (4) Bamboos of genus Phyllostachys are multiphyletic group.

同时对竹类植物分类系统提出新的看法：(1)在目前生殖体特征仍不完全的情况下，以地下茎为基础建立竹子分类系统或对现有分类系统进行修订是合理的，需要对地下茎进行更为详尽的研究并辅以地上秆的高度等方面的信息；(2)青篱竹属复合群中的现有划分方法可依据分子进化研究的结果作适当调整，如可依据MOC1分析的结果划分为低矮灌木、较高灌木和乔木3种类型。

You can search Biosystematic Codes by name or code; you can also add "new taxon" to each for example, muridae new taxon.bc.

你可以通过名字和密码来搜索生物系统密码，也可以在每个搜索后面加入&新分类&（如：鼠科新分类。bc，或者86375新分类。bc

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。