特征的

基本解释 (translations)

diagnostic  ·  stigmal

与特征的相关的网络例句 [注：此内容来源于网络，仅供参考]

In the image feature extraction stage, both global image features and local image features are introduced in this paper including gray-scale pixel values, Gabor Wavelet Filter, Local Binary Pattern, Scale Invariant Feature Transform and etc. In our experiments we focused more on Scale Invariant Feature Transform method and analyzed the detailed performances of these different methods for representing gender information.

在性别特征提取阶段，文中详细讨论了人脸图像全局特征和局部特征的提取方法，例如基于图像灰度的全局特征提取方法，基于小波滤波器变换的特征提取方法和基于局部二值模式的特征提取方法等，并提出了一种基于尺度不变性的特征变换提取方法。

First, the algrithm classify the measurement characteristics as point, line and surface which can be classified to conicoid and free surface. Then, this algorithm establishes the parametric equation according to various features. After that this paper brings forward the characteristic parameters utilising least square method with several characteristic points. Finally high precision probe radius compensation is carried out according to the features.

该算法首先把测量特征分为点、线、面3种基本特征（其中面特征又分为二次曲面和自由曲面），然后建立各种特征的参数方程，利用测量得到的少量特征点，采用最小二乘法拟合得到被测特征的参数，最后根据被测特征参数进行高精度半径补偿。

First it concludes elementary methods for product modeling such as feature recognition, feature-based design and feature mapping. Then it probes into the mechanism of constraint-based feature parametric modeling, representation of feature parametric model and methods for solving constraint in details. At the end it proposes a feature-based modeling system that makes good use of resources and synthesizes many feature modeling methods, and analyses the development of prototype system oriented to actual application.

首先全面归纳了基本的基于特征的产品建模方法，包括特征识别、基于特征设计和特征映射方法，然后对基于约束的特征参数化建模、特征参数化模型的表达和定义方法以及约束求解方法进行了深入研究，最后提出了一个充分利用现有资源，特征识别、基于特征设计和特征映射共用的特征建模系统，并探讨了面向实际应用的原型系统的开发技术。

The difference and relationship among design feature、machining feature and FEM feature are clearly presented. The necessary of feature mapping in product concurrent design system is discussed, and its theory and method are systematically studied.

详细分析了特征信息在产品生命周期中各应用环节的重要作用，揭示了设计特征、工艺特征以及分析特征的本质区别和内在联系，讨论了特征变换的必要性和特征变换的理论方法，指出建立一种柔性的特征表示模型，开发基于约束和参数驱动的特征造型系统，能方便的实现不同应用特征之间的变换，是实现CIM和CE的关键技术。

The concept of form feature and form feature line in terms of describing the automobile form was introduced based on the 100 digital models of automobile.20 form feature lines was captured from the 100 digital models,and sorted into three classes: the main feature line,the transition feature line,and the subjoin feature line.

在构建100个汽车造型数字模型的基础上，引入特征的概念对汽车造型进行描述，提取了20条汽车造型特征线，将其分类为主特征线、过渡特征线和附加特征线，建立了基于特征和特征线的汽车造型描述模型。

Then, the relation between vibration and sound, the acoustic holography method, the indeterminacy and identifiability of BSS, the BSS algorithm are discussed in detail. Based on above researches, the dissertation is divided in following four sections. The first section investigates the BSS algorithm suitable to acoustic feature separation. The algorithm of the joint approximate diagonalization of eigen-matrices is proposed. The spectra or the time-frequency distributions of source signals are the interesting features in ABD and they are separated from mixing signals by JADE algorithm. Then, the convolutive mixing model is transformed into a high-dimension instantaneous mixing model, and the deconvolution of source signals is achieved by the joint approximate block diagonalization of eigen-matrices. The proposed algorithm has a global minimum, and it is unsensitive to noise interference.

论文首先概述国内外声学诊断研究进展与盲分离研究进展，给出机器噪声声场与盲分离的数学描述，讨论了声振辐射、声全息、盲分离模型、盲分离可解性、盲分离结果不确定性、分离算法等基本问题，在此基础上，论文的研究工作分为以下四个部分：第一部分研究适用于声学特征分离的盲分离算法，提出基于特征提取的联合近似对角化盲分离算法，该算法以频谱特征或时频特征作为分离目标，从混合信号中分离源信号频谱特征或时频特征，最大限度地保留了与声学特征提取有关的频谱特征或时频特征，采用模型变换把卷积混合模型变换为一个高维瞬时混合模型，通过联合近似分块对角化算法实现源信号频谱特征与时频特征的盲反卷积。

As feature extraction acts an important role in pattern recognition system, we propose three novel feature extraction methods for HCCR: a、Two structural feature extraction methods, Stroke Cross Counting Features and Peripheral Features are studied. According to the characteristics of Chinese handwriting samples, we extend the SCCF and PF respectively to weighted elastic SCCF and weighted elastic PF. Experiments show that the modified feature extraction approaches are better than original approaches. b、A new statistical feature extraction method——Elastic Meshing Directional Decomposition Feature extraction is proposed. According to the stroke statistical properties of Chinese character, we first decompose a handwritten character pattern into four directional subpatterns. Then a set of elastic meshes are applied to each of the four subpatterns respectively to extract the pixel distribution features.

统计识别方法：利用统计模式识别的经典方法——Bayes分类方法来进行汉字识别的研究，特征提取是统计模式识别的关键，本文着重围绕手写体汉字的特征分析和提取方法进行了研究，提出了三种特征提取的新方法： a、两种改进的结构特征提取方法：在笔划密度特征和外围特征的基础上，结合手写体汉字的特点，提出了加权非均匀笔划密度特征、加权非均匀外围特征的特征提取新方案； b、一种新的统计特征提取方法——弹性网格方向分解特征，根据汉字方块字的特点及笔划分布的统计特征，对手写体汉字进行横竖撇捺四方向的分解，并利用一系列的弹性网格对汉字分解后各分量的象素进行统计而提取特征，实验证明该特征提取方法用来进行手写体汉字识别是十分可行和有效的。

The findings indicated that, the Japonica rice RVA profile characteristic is the concurrently Indica rice nature with the glutinous RVA profile characteristic continuously change body, assumes 5 kind of characteristics class groups, the few idioplasms has the glutinous starch RVA profile characteristic, also has some idioplasms for the starch RVA profile characteristic of Indica rice, the partial idioplasms have the high quality RVA profile characteristic, namely setback for the negative value, the overwhelming majority idioplasm RVA profile characteristic approx

研究结果表明，粳稻的RVA谱特征是兼具籼性与糯性RVA谱特征的连续变化体，呈5种特征类群，少量种质具有糯性淀粉RVA谱特征，即还有一些种质表现出为籼性淀粉RVA谱特征，部分种质具有优质的RVA谱特征，即消减为负值，绝大多数种质的RVA谱特征(约占样本数的85%)，其曲线的显著特征为消减值在250-1000cp。籼稻的RVA谱特征的分化亦呈现为多态性，主要表现为峰值粘度、最终粘度与消减值的分异性，在籼稻种质材料中主体RVA谱类型的特征表现为消减值在1000-2000cp间。特异的分化出3种类型，第一类表现为峰值粘度与消减值均在2000cp

What is more, these methods are applied to shape description of a small target on the sea bed.

提出r特征线及Δr特征，h特征线及Δh特征，l特征线及Δl特征的抽取方法，并将它们应用于沉底小目标形状分析方面。

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

与特征的相关的网络解释 [注：此内容来源于网络，仅供参考]

characterless：无特征的/平凡的/无人物证明书的

characterize /记述...的特徵/表现特徵/赋与特色/ | characterless /无特征的/平凡的/无人物证明书的/ | characters /字符/

featureless：无特征的

feature特征;地貌 | featureless无特征的 | FEB电子功能块

gynecoid：妇女的,有女性特征的

tumid 肿起的,肿胀的 | gynecoid 妇女的,有女性特征的 | typhoid 伤寒症

nondescript：无特征的

nondense 疏的 | nondescript 无特征的 | nondestructive 非破坏性的

undistinguishable：无特征的 不能区分的

undistilled 未蒸馏的 | undistinguishable 无特征的 不能区分的 | undistoredpower 不失真功率

Unlink Instances：取消所有引用特征的链接

Unify All 统一所有的材料侧 | Unlink Instances 取消所有引用特征的链接 | Update All Instances 更新所有的引用特征

estrous：动情期的; 有发情期特征的; 求偶期的 (形)

estrone 雌激素酮 (名) | estrous 动情期的; 有发情期特征的; 求偶期的 (形) | estrum 动情期; 动情周期 (名)

furunculous：[医]疖的 有疖子特征的

supracellular components 超细胞成分 | furunculous [医]疖的 有疖子特征的 | overinsure 给...超额保险

sexed：有性特征的; 性感的 (形)

sexcentenary 六百年的 (形) | sexed 有性特征的; 性感的 (形) | sexily 性感地; 富有魅力地 (副)

Qualifiers：描述关于一个特征的辅助信息

(1)Feature Key,它是描述域生物功能的关键字; | (2)Location,指明特征在序列中的特定位置; | (3)Qualifiers,描述关于一个特征的辅助信息;