selection methods

However, it is often infeasible to deal with such high dimensional data by classical variable selection methods.

然而，经典的变量选择方法面对如此的高维数据有可能完全失去作用。

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Firstly, the paper adopts the horizontal and vertical data smoothing method to process different load data, for the missing data, it uses similar selection methods for addenda, which avoids the impact for load forecasting accuracy by error data or missing data.

首先，本文采用数据横向和纵向平滑处理法对负荷异点进行了处理，用相似日选取方法对缺失的数据来进行补遗，避免了因错误数据或者缺失数据对负荷预测精度造成的影响。

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This paper compares several feature selection methods in text categorization, proposes a new feature selection method based on term frequency and inverse document frequency.

本文在分析比较几种用于文本分类的特征选择方法的基础上，提出了一种基于术语频率和逆文档频率的特征选择方法TDF。

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Experiments are made to compare the algorithms in four aspects: different feature selection methods, dimension, classifier and training set number, using F1 value and false ratio to evaluate.

从四个方面对各种算法进行测试，即不同的特征选择方法、维数、分类算法和训练集个数，采用F1值和虚报率对结果进行评价。

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In this thesis, feature selection methods and emotion recognition methods in a facial emotion recognition system are studied.

本文就人脸表情识别系统所涉及的特征选择和识别方法进行研究。

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This paper introduces the sample methods, testing point selection, testing procedures and results processing of portable gas detector applied in the confined space in the petro-chemical company.

介绍了便携式气体检测报警仪用于石油化工企业中有限空间的气体检测时的采样方法、检测点选择、检测工作程序以及检测结果的处理。

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Methods: The methods of preparation, selection and preserving of autogenous plantar dermis were studied.

方法自体足底皮的取材制备与保存方法,足底皮移植修复眼睑缺损术前后护理.

网络文摘精选

Heritability estimates from different selection methods in rice breeding

水稻不同选育方法的遗传率研究

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innovative selection methods have enabled the isolation of high-affinity cancer-targeting and antiviral antibodies, the latter capable of redirecting viruses for gene therapy applications.

改革的筛选方法已经能够分离出高亲和力的癌-靶向及抗病毒的抗体，后者能够抑制病毒用于基因治疗。

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The traditional feature selection methods are based on the mathematical statistics, ignoring the semantic relationship between terms from text.

传统的文本特征提取方法都是基于数理统计的，忽略了文本中词项之间的语义关系。

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In this paper, we summarize the key methods to the realization of 3D terrain Flythrough: DTM, terrain simplification, terrain illumination, texture mapping and terrain dynamic display, the selection of fly's track and the set of viewport.

论述了三维地形飞行浏览实现的各个阶段的关键技术：地形可视化的数字地形模型、地形的简化、地形的光照处理、纹理映射、动态显示，实现飞行浏览的轨迹设置、视点选择等。

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This paper also introduces the design methods of fact base, rule base and reasoning machine design method of NC tool selection system, and establishes NC tool selection model based on expert system.

论文还详细介绍了数控刀具事实库、规则库以及数控刀具选配系统推理机的设计方法，并建立了基于专家系统的数控刀具选配系统模型。

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Selection methods for pneumatic booster valve

气动增压阀的选型方法

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Selection of methods for determining radiochemical purity of (~ ( 201) T1) thallous chloride

氯化亚铊（~（201）Tl）放射化学纯度测定方法的选择

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We conducted experiments using three existing feature selection methods and combined organically these methods with genetic algorithms.

在实验中，使用三个现存的特征选择方法，用遗传算法将这些基于不同准则的方法有机地结合起来，以达到较好的特征选择效果。

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Three potential task scheduler group selection methods are proposed and simulation tests are made.

提出了3种选择任务调度组的方法，并进行了仿真测试。

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Selection Principle and Development Status of Thick Seam Mining Methods in China

我国厚煤层开采方法的选择原则与发展现状

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A Comparative Study on Several Typical Feature Selection Methods for Chinese Web Page Categorization

几种典型特征选取方法在中文网页分类上的效果比较

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With respect of web service selection methods, globally optimized selection methods suffer exponential costs, causing the efficiency as a bottleneck of these methods.

在Web服务组合的服务选择方法方面，全局最优的Web组合方案引起的指数级性能开销仍然是Web服务组合的一个瓶颈。

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Through example two statistic amendment methods for 'reverse order' data of stockpile reliability test of air ammunition are studied, the incomplete method is mended and the rule of parameter vale selection of amendment function is presented.

文中通过实例，对两种逆序数据的统计修正方法进行了研究，对存在问题的方法进行了改进，并得出了修正函数参数的取值规律。

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The reciprocal recurrent selection inter-population has been used in CIMMYT, and FS, HS, S 1, S 2 and modified row recurrent selection methods have less used.

CIMMYT已经全面转向相互轮回选择，而沿用了几十年的全同胞、半同胞、S1、S2及改良穗行法等已很少使用。

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Review on drill bit selection methods

钻头选型方法综述

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In this paper, the new research and developments made in various aspects of transgenic maize was summarized, including selection of receptor, methods and theory of transformation, selection of marker genes and promoters, establishment of expression vector, aiming characters and the prospect of application.

从玉米转基因的受体选择、遗传转化方法和原理、标记基因的选择、表达载体构建和启动子的选择及玉米转基因研究、生产和应用前景等方面，阐述了玉米转基因研究的进展。

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Reasonable Selection Methods of Deformation Monitoring Analysis Reference for Crustal Movement Based on CORS

基于CORS的地壳运动变形监测分析基准的合理选择方法

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The selection methods applied in soybeen breeding are those used in improving autogamous plant species.

大豆育种工作中应用的选择方法即是那些用于改良自花授粉植物的方法.

词典精选例句

In the classifier design process, different feature selection methods and different classification algorithms and different measurement methods are used. This paper uses BP neural network to classify.

在分类器设计过程中，可以采用不同的特征选择方法和不同的分类算法以及使用的不同的度量方法，文中采用了BP神经网络分类器。

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Expectedly, jQuery provides powerful selection methods that allow you to find and select objects on the page.

jQuery如我们所愿地提供了一些强大的选择方法，帮助我们在页面上寻找和选择对象。

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The commonly used feature selection methods include Information Gain, Mutual Information,χ 2 statistics, Expected Cross Entropy, Word Frequency method, Document Frequency method, Text Evidence and so on.

首先要进行特征选择，常用的特征选择方法包括：信息增益、互信息、χ2统计、期望交叉熵、词频方法、文档频次方法、文本证据权等。

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The selection methods include in vitro assays animal models and a human patient.

目前,筛选方法包括体外途径、动物模型和患者体内途径.

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Comparing Variable Selection Methods for Microarray Classification Models Based on Logistic Regression.

根据逻辑回归方法来对微阵列归类模型做各种不同选择方法的比较.

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