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Description: 为了提高数字图像中椭圆检测的效率和准确性,提出了一个基于最小二乘法的改进的随机椭圆检测算法.
该算法随机选取图像中的3 个边缘点,在以这3 个点为中心的窗口内,从边缘点中拟合出可能椭圆,并通过随机选
取的第4 个边缘点来确认可能椭圆. 利用直接最小二乘法椭圆拟合的特性,引入可能椭圆边缘点收集和椭圆重新
拟合的迭代过程来提取最终的椭圆参数. 通过对含有不同噪声的仿真图片和包括残缺椭圆的实际图片的实验表
明,新算法的改进是有效的. 与原算法相比,新算法降低了对参数的依赖性,提高了检测的速度、稳定性和准确性,
同时保留了原算法的抗噪声能力.-: An imp roved randomized ellip se detection algorit hm based on least square approach was proposed
to enhance t he efficiency and accuracy of ellip se detection in digital images. This algorit hm randomly se2
lect s three edge point s in t he image , and t hen uses least square approach to fit all t he edge point s in three
windows , which are defined by t he t hree edge point s. The forth edge point is randomly selected to judge
whet her a possible ellip se exist s in t he image. Utilizing the characteristic of direct least square fit ting of
ellip se , an iteration process of edge point collecting and ellip se refit ting of possible ellip se was int roduced
to ext ract t he final ellip se’s parameters. Artificial images wit h different level s of noise and nature images
containing incomplete ellip ses were employed to test t his algorithm. Experimental result s show that t he
improvement s are notable. Compared with the original algorit hm , t he propo sed algorit hm reduces
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Size: 369664 |
Author: 刘镖峰 |
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Description: Ext JS发布正式版的3.0. ，RC结束
在经历数次RC版之后，extjs.com终于发布3。0的正式版了。总体而言，较2.0改进不大，依然还是那套组件模型，但具体的变化就按照website的标题介绍如下：
* 提供了参照DWR后与后台的通讯包Direct，支持具有明显的REST风格的CRUD服务
* 一系列的新的组件和例子，包括有图表（Charting， By YUI Flash）
* 功能增强和Bug修正，大约有1k多个吧~IE6下面的内存管理亦有所改善了
* 文档有新内容了，CSS业已重构
* 巩固向后的兼容性，升级没有1。x-〉2。x那时的痛苦。-Ext JS officially released version 3.0., RC end after going through several RC version, extjs.com finally released 3.0 version of the official. Overall, little improvement over 2.0, the set of component model is still, but the specific changes in the title in accordance with the website as follows:* to provide the DWR with the background light of the communication package Direct, support for REST-style visible CRUD services* A range of new components and examples, including a chart (Charting, By YUI Flash)* Enhanced and Bug amendment, about 1k more than you ~ IE6 the following memory management also has improved the document* new content, CSS has been remodeling* consolidate backward compatibility, the upgrade is not 1. x-> 2. x then the pain.
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Size: 1142784 |
Author: yuchao |
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Description: ExtJS MVC 为了积分-ExtJS MVC for points
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Size: 841728 |
Author: benjamin |
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Description: 学习ext+direct的tree源码，功能完全，代码完整，对初学者有用-The tree learning ext+ direct source, fully functional, code complete, useful for beginners
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Size: 5595136 |
Author: feiyong |
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Description: 掏钱学ext，影响了一代人，是ext初学者最直接、最有用的书籍了-Pay school ext, influenced a generation, is the most direct ext beginners, the most useful books of the ... ...
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Size: 1710080 |
Author: jadeneo |
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Description: asp.net无限级分类管理
程序采用Ext+Asp.net3.5+sqlserver2000框架开发。完全无刷新实现添加、删除、编辑节点，鼠标拖动对节点排序和转移父级目录
安装
1.数据库在Data目录，直接附加到sqlserver2000即可
2.修改web.config的CmsSql节点数据库连接信息
3.演示页面地址 主目录/Manage35pe/Ext/ClassManage.aspx
使用
1.右键左边树的任何节点，就有快捷操作弹出-asp.net unlimited classification management program developed Ext+Asp.net3.5+sqlserver2000 framework. Completely refresh realize Add, delete, edit node, the mouse to drag the nodes sorted and transferred the parent directory to install 1. Database in the Data directory, direct-attached the sqlserver2000 can modify the web.config of CmsSql node database connection information. home directory/Manage35pe/Ext/ClassManage.aspx demo page address the Right any node of the tree on the left, there are shortcuts pop-up
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Author: dfasweio |
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Description: 核磁共振（NMR）技术探测地下水是目前唯一的直接找水的地球物理方法。与传统的地球物理方法相比具有高分辨力，高效率，信息量丰富和解唯一性等优点。利用核磁共振地下水探测系统可以高效率地进行区域水文地质调查，确定找水远景区，圈定地下水在三维空间内的分布，进而可靠地选定水井位置等。但是由于水中氢核产生的核磁共振信号的幅度小（纳伏级），要求探测系统的灵敏度高，将引入大量的自然和人为噪声，导致采集信号的信噪比低，解释结果不清楚。
本文用LMS自适应算法提高MRS信号的信噪比，用Hilbert变换提取MRS信号的包络信号，用线性拟合提取水文地质参数并通过仿真实验结果，验证了本文提出的数据处理方法的有效性和准确性。
-Nuclear magnetic resonance (NMR) technique to the detection of direct water division is the only geophysical method to find water. Compared with conventional high-resolution geophysical methods, efficient, informative unique advantages of reconciliation. Groundwater exploration using nuclear magnetic resonance system can efficiently carry out the regional hydrogeological investigation to determine the prospective areas to find water, delineation of ground water distribution in three-dimensional space, and then reliably the location of the selected wells. However, because the water proton NMR signal amplitude generated by small (Na V level), requiring high sensitivity detection systems, will introduce a large number of natural and man-made noise, resulting in low signal to noise ratio acquisition, interpretation of results is not clear.
In this paper, LMS adaptive algorithm improves the MRS signal to noise ratio, with the Hilbert transform to extract the signal envelope MRS signal ext
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Author: zhang chao |
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