网上商店的网站建设

基于HTML语言,嵌套VBScript源代码的ASP编程技术,以IIS为服务平台,实现网上商店系统的构建。介绍了网站开发环境和运行平台、ASP.NET、HTML脚本及VBScript。使用ACCESS数据库管理整个购物系统的后台数据。用户先注册(新用户)或登陆(老用户),再按照分类导航,选物,购物。在整个过程中,用户可随时查询购物车,还可以对每一本书进行评论。管理员可以在后台查看库存,评论,了解购物情况,以便管理。     

基于线性加权法的远程网络评估方法

针对远程网络评估问题，提出一种基于线性加权算法（LWT）的远程网络评估方法，并用VBScript语言和动态网页技术相结合加以实现。在此基础上，构建了系统的体系结构，设计了查询、排名、计算、用户管理等功能模块和后台数据库。对于远程网络评估方法的核心问题，即如何用VBScript语言在ASP程序中实现线性加权算法进行了详细讨论，并以实例验证了方法的可行性和有效性。该方法能够综合考虑多种评价因素对评价结果的影响，客观性和公正性较好。     

基于ASP的在线购物车系统

随着网络购物进入日常生活，开发出更便捷的网络购物系统十分有必要。本文主要介绍了一个在践购物车系统的开发过程。本系统使用SQL数据库作为后台数据库，IIS发布器进行发布，ASP方法进行编程，在连接数据库方面用了ADO方法连接ODBC数据源实现，在编程过程中应用了VBScript和IavaScript语言实现了一些辅助功能。     

在ASP应用中实现网页与Wed数据库的连接

今天,网上测览和主页制作成了热门的话题。然而,遗憾的是HTML语言不能动态更新主页的内容,为了弥补这一缺陷,出现了脚本语言,如VBScript、JavaScript语言等。脚本语言可以嵌在HTML文本内,同网页一起下截到客户机上,并由客户机上的测览器解释执行,也可以使用Microsoft公司的ASP技术,让脚本语言在服务器上运行,生成简单的HTML文本,再送到客户机的创览器上。1ASP介绍服务器端脚本和HTML语言结合在一起而形成的文件称为ASP（ActiveServerPage,活动服务器页面）。在编写ASP时,开发者可以使用ASP内建又4象,这些对象…     

基于JSP技术的网上购物系统

本系统是基于JSP动态网页技术开发的网上购物系统、所开发的基于JSP技术的网上购物系统具有前台用户操作和后台管理两大模块．前台主要功能包括用户注册、产品订购、购物车查看、订单生成、订单查询、留言查看和留言发布等。后台由管理员使用，主要包括商品添加、订单处理、用户信息管理、添加链接、公告信息添加等。对在线购物方面，用户可查询自己需要的商品．选好商品后加入购物车，确定要买的商品后，可去收银台结帐，生成订单，这样就完成了整个购物流程。基于JSP技术的网上购物系统属于电子商务系统，应用B／S开发模型，其后台应用SQL Server2000数据库，前台应用1SP开发语言．在IDK和TOMCAT等工具的应用下可方便地对表系统进行测试。在系统设计中应时刻注意系统安全性，因为电子商务的安全性是非常重要的，必须给用户提供安全性的保征。     

基于ASP的在线购物车系统

随着网络购物进入日常生活,开发出更便捷的网络购物系统十分有必要。本文主要介绍了一个在线购物车系统的开发过程。本系统使用SQL数据库作为后台数据库,IIS发布器进行发布,ASP方法进行编程,在连接数据库方面用了ADO方法连接ODBC数据源实现,在编程过程中应用了VBScript和JavaScript语言实现了一些辅助功能。     

电脑英文通

ASP（ActiveServerPage）动态服务器网页技术ASP是微软公司为IIS（InternetInformationServer，Internet信息服务器）开发的一种专用接口（或者说脚本），利用它可以编写和运行动态、交互、高效率的Web服务应用程序。ASP功能强大而且容易编写，但是只能用在IIS上。ASP可以用VBScript和JavaScript编写，还附带一些常用的功能组件：如访问人数的计数器和判断用户对某个特定文件是否有权的检查器等等。BackDoor后门指绕过安全性控制而获取对程序或系统访问权的方法。在软件的开发阶段，程序员常会在软件内创建后门以便可以修改程…     

高校信息查询系统的设计与实现

本文是针对当前网上高校信息比较零散的问题提出解决方案。系统采用B／S模式,利用ASP（Active Server Pages）脚本开发语言VBScript,结合ADO（Acuve Data Object）数据库存取技术,建立一个高校信息查询系统。该系统可以实现各种不同类别的查询,能按照不同地区、不同的高校名称或是否为重点建设院校等来分类查询相应的高校信息,此外还具有留言板功能。后台管理能够进行高校信息实时的添加、删除、修改等工作和管理留言。     

利用ASP技术实现对数据库的操作

利用ASP,可以很容易地把HTML(超文本标记语言)文本、脚本命令及ActiveX组件混合在一起构成ASP页,以此来生成动态网页,创建交互式的Web站点,实现对Web数据库的访问。当用户使用浏览器请求ASP主页时,Web服务器响应,调用ASP引擎来执行ASP文件,并解释其中的脚本语言(JScript或VBScript),通过ODBC连接数据库,由数据库访问组件ADO(ActiveX Data Ob-jects)完成数据库操作,最后ASP生成包含有数据查询结果的HTML主页返回用户端显示。用ASP中数据库连接的多种方法,可以有效利用ASP技术访问WEB数据库。     

基于ASP的网上商城设计

随着是互联网络的普及,电子商务应运而生,并在近几年迅猛发展。本文主要研究的是利用ASP开发网上商城的一般方法。从立项到设计实施的整个过程。系统中主要实现了用户注册、商品检索、购物车、商品评论等功能和强大的后台管理功能。该系统具有一定的应用价值。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.     

Editorial: Special issue on recent advances in hybrid control theory and applications

正The demands of a rapidly advancing technology for faster and more accurate controllers have always had a strong influence on the progress of automatic control theory.In recent years control problems have been arising with increasing frequency in widely different areas,which cannot be addressed using conventional control techniques.The principal reason for this is the fact that a highly competitive economy is forcing systems to operate in regimes where     

Information for Authors

正Aim The Journals of Zhejiang University-SCIENCE(A/B/C)areedited by the international board of distinguished Chinese andforeign scientists,and are aimed to present the latest devel-opments and achievements in scientific research in China andoverseas to the world’s scientific circles,especially to stimulateand promote academic exchange between Chinese and for-eign scientists everywhere.     

Enhancing a leaf radiative transfer model to estimate concentrations and in vivo specific absorption coefficients of total carotenoids and chlorophylls a and b from single-needle reflectance and transmittance

The relative concentrations of different pigments within a leaf have significant physiological and spectral consequences. Photosynthesis, light use efficiency, mass and energy exchange, and stress response are dependent on relationships among an ensemble of pigments. This ensemble also determines the visible characteristics of a leaf, which can be measured remotely and used to quantify leaf biochemistry and structure. But current remote sensing approaches are limited in their ability to resolve individual pigments. This paper focuses on the incorporation of three pigments—chlorophyll a, chlorophyll b, and total carotenoids—into the LIBERTY leaf radiative transfer model to better understand relationships between leaf biochemical, biophysical, and spectral properties.Pinus ponderosa and Pinus jeffreyi needles were collected from three sites in the California Sierra Nevada. Hemispheric single-leaf visible reflectance and transmittance and concentrations of chlorophylls a and b and total carotenoids of fresh needles were measured. These data were input to the enhanced LIBERTY model to estimate optical and biochemical properties of pine needles. The enhanced model successfully estimated reflectance (RMSE = 0.0255, BIAS = 0.00477, RMS%E = 16.7%), had variable success estimating transmittance (RMSE = 0.0442, BIAS = 0.0294, RMS%E = 181%), and generated very good estimates of carotenoid concentrations (RMSE = 2.48 µg/cm², BIAS = 0.143 µg/cm², RMS%E = 20.4%), good estimates of chlorophyll a concentrations (RMSE = 10.7 µg/cm², BIAS = − 0.992 µg/cm², RMS%E = 21.1%), and fair estimates of chlorophyll b concentrations (RMSE = 7.49 µg/cm², BIAS = − 2.12 µg/cm², RMS%E = 43.7%). Overall root mean squared errors of reflectance, transmittance, and pigment concentration estimates were lower for the three-pigment model than for the single-pigment model. The algorithm to estimate three in vivo specific absorption coefficients is robust, although estimated values are distorted by inconsistencies in model biophysics. The capacity to invert the model from single-leaf reflectance and transmittance was added to the model so it could be coupled with vegetation canopy models to estimate canopy biochemistry from remotely sensed data.     

Mr. Twinn’s bombes

This article discusses the history and design of the special versions of the bombe key-finding machines used by Britain’s Government Code & Cypher School (GC&CS) during World War II to attack the Enigma traffic of the Abwehr (the German military intelligence service). These special bombes were based on the design of their more numerous counterparts used against the traffic of the German armed services, but differed from them in important ways that highlight the adaptability of the British bombe design, and the power and flexibility of the diagonal board. Also discussed are the changes in the Abwehr indicating system that drove the development of these machines, the ingenious ways in which they were used, and some related developments involving the bombes used by the U.S. Navy’s cryptanalytic unit (OP-20-G).