查询词典 clustering

Junction area; environment geology; protogenic geological environment protogenic geological environment; grey clustering method; environment geology quantity divise

论文导师王运生，论文学位硕士，论文专业环境工程论文单位成都理工大学，点击次数 1，论文页数 86页File Size4825K

The main work and result in this paper are described as the following: Aiming at the defects like slow-speed and low-efficiency of the traditionalhierarchical clustering method in pattern-recognition, this paper provides an improvedclustering method by the quartation in the particular image-processing field.

本文的主要工作和成果如下：针对模式识别中传统的谱系聚类法聚类速度慢、效率过于低下的缺点，提出一种在特定图像领域中利用四叉树分割进行改进的聚类方法。

The major achievement of this paper is: Based on characteristics of the traffic data distribution, execute pattern recognition operations on traffic condition on two dimensions by clustering, then use BP neural network to describe and forecast traffic flow aiming at each pattern. Making use of classic flow-occupancy inverse "V" model, implement polynomial fitting using least-squares algorithm and statistics method on flow curves to detect outliers which are proved to be not accord with practice through the actual implement, then use the moving average model to recorrect the outliers and absent. Make correlation analysis on muti-direction flow queues of the intersection and ones of upriver intersections, choose flow queue with high correlation as assistant one to improve the error tolerance of the prediction system, at the same time we can use the method to give an estimation of flow in intersection with out sensors. We design and implement an SOA(Service-Oriented Architecture)-based UTDD(urban traffic data mining development) with high expansibility and performance, which implement unified management and call of the data-mining application though defining a XML-based description of data-mining process and a common interface to call data-mining process, finally we build traffic flow prediction application model on UTDD.

根据交通流量数据分布的特征，提出基于k-means的二次聚类方法，对交通流量在流量大小和时间上进行模式划分，进而对各个交通流模式进行基于BP神经网络的描述和预测，从而提高模型对流量预测的精度； 2）根据流量/时间占有率倒&V&字形曲线分布模型，提出基于最小二乘法的三次多项式曲线拟合和统计方法的异常检测方法，实际应用表明该方法能够有效识别异常数据，然后根据移动平均算法对异常数据进行修正； 3）基于序列相关性分析，分别对预测方向的交通流量数据序列、上游路口相关序列以及预测路口其它各个方向上的交通流量序列进行分析，选择相似性流量序列，作为辅助序列提供其他没有检测器路口的流量估计； 4）设计和实现了基于SOA（Service-Oriented Achitecture）的高性能、可扩展的智能交通数据挖掘系统UTDD，该系统通过定义基于XML的数据挖掘过程描述和通用的过程模型接口，实现数据挖掘应用的统一管理和调用，最后在UTDD上建立了基于路口流量预测的应用模型。

Clustering of behavioral phases is performed to represent the function of a circuit more explicitly and refinedly.

提出了一种新的行为模型的描述方法：行为阶段聚类描述。

A new clustering method based on Web users' interests regressively analyzes users' behaviors, partitions the interesting matrix with a threshold λ, and finally relocates some elements of clusters based on the joint strength between an element and a cluster.

采用了多元线性回归分析用户浏览行为，直接对兴趣相似矩阵进行λ截聚类，最后通过计算项与类的连接强度来调整聚类结果。

When 20% accessions were selected, Mahalanobis distance and Ward's method using stepwise clustering combining with preferred sampling can construct a most reprehensive core collection and was the most suitable method for constructing M. sieversii core collection.

本研究显示，当取样比例为20%时，采用马氏距离，利用离差平法和法进行多次聚类，结合优先取样策略构建的核心种质最有代表性，是构建新疆野苹果的最佳的方法。

Then, cor ners were clustered according to the corner clustering strategy to build the inv a riant model of local features of unknown natural landmark.

根据角点聚类策略提取自然路标局部特征，并提出不随距离、角度变化的局部特征不变性表示及匹配方法。

At first, this algorithm obtains rough similar series by clustering the broad moving average; Second, based on this, we can construct the similarity degree of time series trend, by using this similarity degree of time series trend, the users can do riddling secondly. At last, through calculating the distance of the residual time series, accurate similar time series are reached.

该方法首先利用对时间序列广义移动均值的聚类进行相似搜索的粗匹配；然后通过构造时间序列趋势的相似度，利用用户对趋势相似度的要求可以进行第二次筛选；最后对剩余的时间序列进行距离计算，就可以获得最终符合用户需求的相似时间序列。

Finally, the origin and evolution of wild Rosa rugosa in china were discussed in terms of the clustering result and the evolution roles of botanic pollen.

最后，结合聚类分析结果及花粉形态的演化规律，对中国野生玫瑰的起源及演化进行探讨。

Clustering displacing of small朾owel loops were found in 9 cases. Reduced enhancement of intestion wall were found in 5 cases. Demonstrated as a saclike mass between stomach and pancrase were found in 2 cases.

结果 小肠内疝主要表现为：8例有疝口，9例有肠管聚集、肠系膜走行异常，5例显示肠壁强化减弱，2例显示胃和胰腺之间囊实性肿块；肠梗阻、腹水。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。