特征量

AS级Internet拓扑基本特征量演化分析

Analysis of Basic Feature Evolution of AS-Level Internet Topology

形状特征量&相对平均半径误差Δr。

Picking up the average radius error as the shape feature .

Internet网络效能及其物理特征量分析

Internet Validity and Its Physical Properties Characteristic Quantity

以盒维数和信息维数为识别特征量的GIS局部放电模式识别方法

PD pattern recognition method using box dimension and information dimension as discriminating features in GIS

特征量被预处理后，输入到集成BP神经网络分类器中分类。

Finally , The features are preprocessed , then classified by integrating BP neural networks .

提出了BP算法和遗传算法相结合的电力系统暂态稳定性评估新方法，选取了以稳态特征量、故障初始时刻特征量和暂态特征量构成的综合特征量作为稳定性评估系统的输入特征量。

BP Algorithm is combined with Genetic Algorithm to generate a new scheme to assess power system transient stability .

基于Gabor特征量和核函数判决分析方法的人脸识别

Face recognition based on Gabor features and kernel discriminant analysis method

PAM对一维垂直入渗特征量影响的试验研究

The Experimental Study on the Influences of PAM on One-dimensional Vertical Infiltration

把Laws掩模和花纹图像卷积后计算的能量作为纹理描述的一个特征量，实现初步的鞋印纹理分类。

The initial classification is made according to the Laws energy characteristic quantity calculated from the convolution of the template and the shoe print image .

本文提出了一种以AR（p）参数构成的二次特征量来计算系统各种状态之间灰色关联度的AR-GR新方法。

In this paper , a new diagnostic method of grey-relation based on the parameters of the AR ( p ) modelis proposed .

从这个后验分布，可以进行可靠性特征量的Bayes点估计和区间估计。

According to the posterior distribution , Bayes point estimation and interval estimation is solved .

利用小波包分解技术对信号进行分析，得到有效的特征量作为BP神经网络的输入样本，并对网络进行学习训练，完成对刀具磨损状态的有效识别。

The selected features are then considered as inputs to BP neural network to complete recognition of the status of the cutting tool .

并通过SAS软件运行中心聚类算法验证了选取GPS经纬度作为特征量的正确性。

We verify the correctness of selecting GPS latitude and longitude as the characteristics through the center clustering by SAS software .

JONSWAP谱和N谱的几个对应特征量间的关系

Relations of JONSWAP spectrum and neumann-form spectrum characteristic variances

提出一种燃烧稳定性判别方法，该方法利用以上三个特征量作为BP神经网络输入参数，得到输出确定为火焰稳定性系数，然后用模糊判别给出准确的燃烧稳定性综合评估。

A method judging pulverized coal combustion stability by BP Neural Network and fuzzy pattern recognition was presented by using the three character values of image .

笔者认为VΔT是与介质的时间平均强度相应的，与地震活动的时、空分布图象有相应关系的特征量。

It is considered that V Δ T is a characteristic quantity which relates to medium strength and space - time distribution patterns of seismicity .

当可靠度特征量满足正态分布时，其分布参数（μ，h）的共轭型先验分布为正态伽玛分布。

When the pertinent parameter involved in reliability definition complies with normal distribution , the conjugate prior of its distributing parameters (μ, h ) is of normal-gamma distribution .

本文引入水气两相流模型，用kε紊流数学模型模拟计算了阶梯溢流坝自由表面掺气的特征量。

By introducing air-water two phase flow model , this article uses k - ε turbulence model to calculate the characteristic variables of free-surface aeration on stepped spillway .

引进能量、Shannon熵和标准差STD作为特征量对气固两相流频域空间进行分析。

Energy , Shannon entropy and standard deviation were applied to characterize gas-solid two-phase flow in frequency space .

阻性泄漏电流基波和3次分量是反映MOA劣化现象的两个故障特征量，仿真分析对此问题及间谐波电压对阻性泄漏电流的影响。

Resistive first-harmonic current and third-harmonic current are the two fault eigenvectors reflecting MOA 's aging phenomenon .

BP神经网络以这些能量特征量为输入对油气两相流不同流型（包括泡状流、塞状流、层状流、弹状流和环状流）进行分类。

With these energy features as inputs , five flow patterns such as bubble flow , plug flow , stratified flow , slug flow and annular flow are identified using BP neural network .

基于DGA特征量的变压器绝缘故障诊断专家系统的研究

Research on Expert System of Transformer Insulation Fault Diagnosis Based on DGA Characteristic Parameters

SVM的样本输入标签多表示为布尔型数值，而本方法采用公式计算特征量的权重，能更好的体现出每个特征在检测时的重要程度。

SVM sample input label expressed by Boolean value using , this paper use the formula calculate the characteristic amount of weight which reflects importance degree of each feature in the detection .

在提取作为刀具磨损特征量的AR模型参数时，考虑了切削用量对模型参数的影响，提出了特征量选取的准则，使所提取的特征量更加实用化。

The influence of cutting parameters was considered when the features sensitive to tool flank wear are extracted from the time series AR model . The principle of feature extraction was proposed .

应用文中方法，系统中各个测试系统的可用度、失效率等可靠性特征量可以直接由GO图计算，并解决了有共有信号时可靠性特征量计算的实际问题。

By using this method , the reliability characteristics for the quantity of each testing system usable degree , the failure rate can be derived directly from the GO graph . This method also solves the practical problem of the reliability parameter calculation with shared signals .

介绍了一种新研制成功的以坐标测量技术为核心，结合图像检测技术和Oracle数据库技术研究和开发出的炮弹结构特征量测量系统。

This paper introduces a newly-developed measuring system for shell structure characteristic parameters with the coordinate measuring technology as its core and in com - bination of image measuring technology and Oracle database technology .

将Bootstrap估计方法引入到可靠性统计分析，提出了可靠性参数和特征量的Bootstrap区间估计方法；

Based on Bootstrap estimate method being introduced into the reliability statistical analysis , the Bootstrap interval estimate method of the reliability parameter and characteristic value is proposed .

该方法通过测量某相电压，由该相电压的导数构造三相电压，进行d-q变换提取特征量；

Dummy three-phase voltages are gained by the derivative of any phase voltage , which is the improved d-q transform without delay .

其特征量为8.4Pg（Pg／0.0044A），RSD为1.4%～5%，铅回收率为90%～110%。

The feature amount is 8.4 Pg ( Pg / 0.004 4A ), RSD 1.4 % ~ 5 % and the recovery of lead reached 90 % ~ 110 % .

该方法基于活动轮廓模型以及本研究所定义的边缘对比度特征量，利用Hopfield神经网络并结合模拟退火算法自动提取IVUS序列图像冠状动脉血管壁的内、外膜边缘。

The method was based on the active contour model and the edge-contrast , and that Hopfield neural network was employed as well as the simulated annealing algorithm .