查询词典 extrinsic feature

The paper sees Horton code as a primary characteristic value and generalizing condition of the river network, and selects, simplifies and generalizes river based on scale of before and after generalization,, The main contents of paper include:(1)Reviews generalization concept, arithmetic operators, methods, influence factor and frame of map generalization and design, analyze core theory of feature —oriented map generalization, discuss the main context and applicable method of river feature generalization(2) Summarizes natural form and spatial configuration characteristic of the river network, and describe the river network using digraph Paper mostly researches tree —like river, identifies the direction of river based on the angle of the main and secondary reach, and identifies the main river based on most length and predominant continuation of the flow direction along the major channel , then receives the grade of river by recursion and structuralize river network, builds hiberarchy rank system of river based on Horton coding(3)Designs the model of river network based on Horton code, and organizes the data of node, branch and river.

本论文把Horton编码作为水系网的一个主要特征值并以此作为综合条件，并根据综合前后的比例尺对水系网进行选取、化简和概括。论文的主要工作包括：(1)总结地图综合的概念、算子分解、实现方法、主要影响因素和总体设计框架，分析面向地理特征的制图综合的核心理论支撑，在此基础上讨论水系专题要素综合的主要内容和综合适用的方法。(2)总结水系网的自然形态和空间结构特征，用图论对水系网进行描述。以树状水系作为主要研究对象，依据树状水系的主支流交汇关系确定水系流向，依据水系中主流的长度最长和主流保持原有的流向趋势确定主流，按此递归得到河流的不同级别，对基于河段组织的水系网结构化，自动建立水系的Horton编码。(3)设计基于Horton码的水系网模型，对结点、河段、河流和河系的数据进行有效的组织。

By getting the FFT angular feature parameters from outline image of tracheid,a lotof common angle of cell walls can be obtained.This method can be used to describing theshape of tracheid and reduced tracheid's feature model,which can't be achieved by traditionalobservation method.

通过管胞轮廓图的FFT角度特征参数提取，还原出大量样本数统计意义上的细胞壁角度，解决了管胞的形状描述问题，还原出管胞的形态模型，这也是传统的观察法无法做到的。

Though analyzing and studying the following conclusions are gotten:(1) The fault features can be extracted from the unstably and stably vibrant signals in different extents by the methods of STFT, WPARMS and SOCS effectively (2) The acceleration signals not only possess far higher signal-noise rate of feature information than that of the stable, but also conceal the feature information which has not in the stable signals.

通过分析与研究，得出了如下结论：(1)短时Fourier变换、小波包AR谱、二阶循环谱均能有效处理发动机稳态和非稳态振动信号。它们都能在不同程度上提取出包含在振动信号中分析对象的故障特征。

Selection feature of vocational and technical education isn't in contradiction with that basic development feature of education.

职业技术教育的&选拔功能&与&教育的基本功能是发展&的理论并不矛质。

According to Maxwell' geomorphology theory and the standardization characteristic of surface texture feature based on GPS'(geometrical product specification) areal method, deeply research the change tree and Wolf pruning technology which were used in analyzing surface topography. Further standardized the Wolf pruning standard of area, line and point feature etc and the quantification parameters of charactering surface texture. And expound its feasibility in engineering practicability by taking an example.

基于Maxwell的地貌学理论及GPS(geometrical product specification)区域法表面结构要素的规范特点，深入研究应用于表面形貌分析中的变化树及Wolf修剪技术；进一步规范区域、线、点等要素的Wolf修剪标准及表征表面结构的量化参数；并以实例阐述其在工程实践中的可行性。

Put forward improvement DF algorithm and TD-IDF algorithm, the time that used DF algorithm to have linear on one hand is complex degree, suit the characteristic that large-scale text handles quite, adopt the method that adds a keyword appropriately, the insufficient; that made up for its to filter to mistake of individual and useful information on the other hand, use a feature the weight that chooses level in the feature undertakes adding counterpoising handling to TD-IDF method, the dimensions of documentation collect expanded below the circumstance that does not increase expenditure, still raised likeness to spend calculative accuracy.

提出改进的DF算法和TD-IDF算法，一方面利用了DF算法具有线性的时间复杂度，比较适合大规模文本处理的特征，并通过适当增加关键词的方法，弥补了其对个别有用信息错误过滤的不足；另一方面，利用特征项在特征选择阶段的权重对TD-IDF方法进行加权处理，在不增加开销的情况下扩大了文档集的规模，还提高了相似度计算的精确度。

Meanwhile, the feature model also gives a definition of reflection in the requirements of middleware, that is, the reflection of middleware is a feature that crosscuts other middleware features that can be bound or unbound at runtime. The architectural style of reflective middleware presents the structure and mechanisms internal of reflective middleware from the perspective of the developers of middleware.

其次，从软件体系结构的角度考察了反射式中间件的内部结构与运行机理，总结出反射式中间件软件体系结构风格，不仅为反射式软件中间件的研究与实践提供了统一的术语空间，还为反射式中间件开发人员提供了一个直观、易于理解的基准模型。

Four aspects are studied in this paper: the study of non-linear syllable theory of the analysis ofdengyunxue of the syllabic structure of Chinese character, the study of the distinctive feature theory of the four types of the articulation of initials, the study of the markedness theory of the devoicing of the fully voiced initials and the study of the feature geometry theory of the correlates between the devoicing of the fully voiced initials and tonal change. Through our studies, conclusions can be drawn as follows:(1) Contemporary phonological theories can be used to elucidate the principle of Chinese dengyunxue;(2) Contemporary phonological theories can be used to explain the historical phonetic change of Chinese;(3) Different theories and methods of contemporary phonology should be applied to deal with different problems of Chinese phonology;(4) The application of contemporary phonological theories to the study of the historical phonetic change of Chinese is helpful to test and verify the universalizability of these theoretical hypotheses

通过对等韵字音结构分析的非线性音节理论研究、声纽四等的区别特征理论研究、全浊声母清化的标记理论研究和浊音清化与声调演变相互关系的特征架构理论研究等四项初探，揭示了：（1）当代音系理论可以阐明汉语等韵学学理；（2）当代音系理论可以解释汉语历史音变现象；（3）不同的汉语音韵问题，应该用不同的当代音系理论方法来研究；（4）当代音系理论在汉语历史音变研究中的运用，有助于验证其理论假设的普适性

By SWOT method, the paper analyses Chi Zhou's conditions of developing feature agriculture from its advantages and disadvantages and chances and challenges. With agricultural regional layout, Chizhou's feature agriculture areas fall into following categories: the one with mass characteristic in diked bases in the west north along Changjiang River, the one with interactive characteristics in middle mountainous part, and the one with agricultural and forest integration characteristics in low mountains in the southeast, among which emphasis should be put to develop fine rice and cotton and tea and sericulture and medicinal materials and bee-related product and distinctive seafood and livestock product.

为了充分发挥池州市发展特色农业的优势和潜力，促进池州市特色农业的快速发展，该文通过SWOT分析方法从优势、劣势、机遇、挑战等方面深入分析了池州市特色农业的发展条件，结合农业区域划分的成果将池州市特色农业的区域布局分为西北沿江洲圩基地规模型特色农业区、中部丘陵产业互动型特色农业区和东南部中低山农林复合型特色农业区三个区，其中优质米、优质棉、茶叶、蚕桑、中药材、蜂产品、特色水产品和畜产品等的生产是各区的发展重点。

A heuristic search strategy and a practical example are given.The result shows the consistent feature selection reduction method can eliminate the disaccords of the sample dataset,select the optimal feature variables,drop the dimension of the data and reduce the redundancy information effectively.

给出的启发式搜索策略和应用实例表明：一致化特征选择约简方法能有效消除分类数据集的不一致性，选择最优的特征变量、降低数据的维数、减少数据集中的冗余信息。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。