利用Alpha Shapes算法提取离散点轮廓线     

周飞 《湖北广播电视大学学报》2010,30(2):155-156

本文介绍了Alpha Shapes算法的原理和具体的实现方法,并将其应用到LiDAR离散点云数据的轮廓线提取,取得良好效果。  相似文献   

高校构建和谐校园评价指标体系研究     

郭德  高岩岩  李月娟  马晓宇 《未来与发展》2013,(10):75-80

基于对和谐校园文献的查阅和高校教师的访谈,结合对西北工业大学行政管理人员、教师和学生关于高校构建和谐校园的229份调查问卷数据,运用Cronbach’s Alpha和探索性因子分析方法对样本数据进行信度和效度检验,构建了高校和谐校园评价指标体系。井在此基础上应用结构方程模型探析了和谐校园评价指标中一级指标之间的相互关系。为高校和谐校园的构建提供了新思路。  相似文献   

Teaching Classic Probability Problems with Modern Digital Tools     

Sergei Abramovich  Yakov Yu. Nikitin 《学校用计算机》2017,34(4):318-336

This article is written to share teaching ideas about using commonly available computer applications—a spreadsheet, The Geometer's Sketchpad, and Wolfram Alpha—to explore three classic and historically significant problems from the probability theory. These ideas stem from the authors’ work with prospective economists, mathematicians, and teachers. The historical contexts include the problem of the division of stakes (14^th century), the problem of the Grand Duke of Tuscany (17^th century), and the problem of co-primality of two natural numbers chosen at random (19^th century). The suggested use of computers can be extended to other probability contexts to achieve at least two goals: to make complex mathematical ideas more accessible and to emphasize the importance of experimental evidence as a means of conceptual development in mathematics for all student populations.  相似文献   

南京栖霞寺基岩及溶洞特征研究     

韩晓南 《环球赛鸽科技》2014,(28)

由于零星岩溶塌陷等地质灾害威胁了栖霞寺的安全,运用高密度电阻率法和α卡2种方法研究了栖霞寺基岩面变化情况、构造分布和溶洞区域分布情况。研究结果表明,栖霞寺内第四系厚度在0-25m之间,厚薄不均,基岩面起伏较大,勘查区出现由断层导致的异常低阻带和土氡异常带,溶洞主要发育区呈现为北东向的长条状区域。  相似文献   

Alpha通道在多媒体课件作品开发中的应用   总被引：2，自引：0，他引：2  

周中云 《现代教育技术》2003,13(2):71-73

Alpha通道本质上是采用8位二进制数存储于图象文件中代表各像素点透明度的附加信息,Alpha通道技术因而成为图象合成最基本技术,利用它能够创作出十分丰富的图象效果,并在Photoshop、3dmax、Flash、Premiere等多媒体素材软件以及Authorware多媒体集成工具中得到广泛应用。  相似文献   

基于计算的知识搜索引擎Wolfram Alpha研究     

蒙柳 《图书馆学研究》2010,(4)

Wolfram Alpha是一个全新的、基于计算的知识搜索引擎,它将其创始人史蒂芬.沃尔弗拉姆开发的Mathematica和NKS技术应用到了互联网搜索中,为互联网用户提供了一种与传统搜索引擎截然不同的知识搜索和发现方式。凭借着独特的知识检索机制,它被《大众科学杂志》评为计算领域的2009年度最佳创新。本文介绍了Wolfram Alpha的一些基本情况,阐述了其理论背景和技术手段,并探讨了其知识检索机制和存在的一些问题。  相似文献   

Sybase在Tru64 UNIX操作系统上的安装与配置     

彭莹 《现代情报》2009,29(2):207-209

在实际操作的基础上,详细介绍了Sybase在Compaq Alpha小型机的Tru64 UNIX操作系统上的安装与配置。  相似文献   

Effect of anti-epileptic drugs in pregnancy and teratogenesis     

Sowbhagya Lakshmi  Kulkarni Sunanda 《Indian journal of clinical biochemistry : IJCB》2008,23(3):267-271

Epilepsy raises special concern in women during pregnancy. Antiepileptic drugs are known to induce major and minor malformations in the foetus. Aim of the study was to find an association between maternal serum alpha fetoprotein levels, foetal abnormalities and antiepileptic drugs mediated teratogenicity. Maternal serum alpha feto protein levels, kidney and liver function tests in age matched normal pregnant women and seizure free epileptic pregnant women during 12–14 weeks of gestation were estimated. Cases were subjected to ultrasonography at 11^th–14^th week of pregnancy and again at 20^th week of pregnancy. maternal serum alfa feto protein was assayed by a specific Electro Chemiluminescence Immuno Assay test. There was no significant difference in kidney and liver function tests in cases as compared to controls. There were elevated levels of alpha feto protein in cases as compared to controls but this was not statistically significant. No anomalies were detected in ultrasound reports. Most women had normal full term delivery with healthy children but of low birth weight. No correlation was seen between maternal serum alfa feto protein levels and antiepileptic drug leading to teratogenesis.  相似文献