分层

The basic theories of mathematical morphology for binary image are stated, and the most simple structure elements of morphologic transformation for binary images are proposed and proved. The geodetic morphologic transformation models are also developed. For the purpose of improving the speed of transformation in computer, the"set symmetric difference"is introduced to adapt each model. Some new morphologic filtering models and quantitative evaluating model of filtering effects in image processing are proposed, under the applied condition. The morphologic thinning methods are studied, and two new morphologic thinning models are developed. On the basis of analyzing the characteristics of mining maps, the image vectorizing tactics and a series of algorithms are proposed, including dynamic adaptive image thresholding using two thresholds, graphic and text separation, noise removal, and multi elements extracting models with mathematical morphology. Accuracy preserving compressed vectorizing model for image vectorization is put forward to generate vector data in multi layer.

论文对二值图象形态学的基础理论进行了较系统的阐述，提出并证明了二值图象处理中形态变换的最简单结构元素，并发展了测地形态变换模型；为了提高形态变换的计算机实现速度，引入了集合论中"对称差"的概念对各形态变换模型进行了改化；针对数学形态学在图象处理中的实际应用，提出了新的形态滤波模型及滤波效果的度量评价模型；研究了形态细化方法，提出了快速形态细化和保形快速形态细化算法；在研究矿图基本特征基础上，提出了人机协同矿图扫描图象矢量化处理策略及一系列扫描图象处理算法模型，包括双阈值动态自适应图象二值化、图文分离、噪声去除、图面多种要素提取形态变换模型等；在图象栅格—矢量转换中，提出了保精度压缩矢量化模型，以生成分层要素矢量数据。

Analysis of its causes, in addition to the traditional sense of "historical influence of traditional" factors such generalization, but also by the concept of modern democracy-building in the village at the end; imperfect system of village representatives, the lack of monitoring the implementation of the institutions; villages appeared on behalf of villagers with the villagers of the impact of social stratification efficiency; Basis as a result of poor villages, the villagers than the cost of representatives of institutional arrangements for the proceeds of a direct impact on such factors.

分析其原因，除了在传统意义上的"受传统历史影响"这类普遍化因素外，还受到现代民主理念末在该村庄建立；村民代表制度不完善，缺乏监督执行的机构；村庄出现村民代表与村民的社会分层影响效能发挥；由于村庄基础较差，村民代表会议制度安排成本高于收益等因素的直接影响。

15 hospitals and 2 937 residents were selected and studied through random and systematic sampling methods in Hainan Province.

采用分层抽样和随机抽样方法对15家医疗机构和2 937名疟区居民进行流行病学调查。

At present,the methods of random sampling,systematic sampling and stratified sampling are widely used in remote sensing sampling.

目前，随机抽样、系统抽样和分层抽样方式在遥感抽样调查技术领域应用比较广泛。

Methods 3944 persons were selected by systematic sampling in 3 districts.

采取分层随机整群抽样的方法，于2006年10月和2007年9月进行2次调查，以示范路上沧浪区、金阊区、高新区的33个单位、10个社区居民，共计3 944人作为调查对象。2007年9月，以非示范路上某区采取同样方法抽取居民809人进行问卷调查。

All subjects in the sample of 600 individuals were selected by a stratified systematic random sampling method and interviewed by trained interviewers.

本研究采横断面研究方法，以苗栗县所有65岁以上老年人作为研究母群体，采分层随机抽样的方法，共得到600位样本，其中男性302人，女性298人。

Systematic grid sampling is the most popular method at present, but it could loss some important distribution information. Systematic unaligned sampling is the most ideal method. It is easy to find periodical distributing field information with systematic unaligned sampling method.

其中规则栅格采样是目前最常采用的方法，但容易丢失一些比较重要的分布信息；系统分层采样是最理想的方法，容易发现具有周期性分布的农田信息。

Application of a natural stratification heat storage tank toindustrial waste h.

自然分层蓄热技术在工业余热回收中的应用。

So the optic rectum is centrum of visual system. The avian optic tectum showsthe highly organized lamination.

视顶盖是视叶外侧部一个分层很明显的结构，在顶盖下的视叶内侧区包括顶盖前区、峡核和中脑网状结构。

In this paper,the scanning strategy of Internet worm In hybrid（IPv4/IPv6） network environment which existing a large number of NAT are first analyzed.A new type of worm,TeredoWorm based on Teredo service is built.This worm applies two different layers scanning strategy.It means that the worm apply subnet scanning strategy in local subnet and apply scanning strategy based on Teredo service in inter-subnet.

首先在存在大量NAT的混合型（IPv4/IPv6）网络环境中分析了网络蠕虫的扫描策略，构建了一种新型的基于 Teredo服务的网络蠕虫—TeredoWorm，该蠕虫应用分层扫描策略为在本地应用子网内扫描策略；在子网间应用基于Teredo服务的扫描策略。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。