A Correspondent Node Binding of Method Based on Early Binding Updates Option

The mobile IPv6 protocol solves the mobile communication problems in the next generation Internet.The mobile IPv6 not only provides huge address space,but also strengthens handover ability of mobile user,and realizes route optimization.IPv6 will become the next generation Internet protocol;so the mobile IPv6 will be widely used in the next generation Internet.The moblile IPv6 will provide in the future network,a uniform transmission platform that transmits data,voice data and video data,or other services.People not only put forward more and more requirements for multimedia playing operation,but also bring forward higher request,which is interaction capabiliby communication,Because the long latency associated with mobile IPv6's return routability procedure of correspondent node binding,this paper presents a fast correspondent node binding of method based on early binding updates option.The method not only eliminates at least 50% of the additional delay that a standard correspondent node binding adds to the network stack's latency,but also reinforces the ability to support alternant real-time application.     

Study of SOCKS Firewall Based on IPv4/IPv6

An extended function of SOCKS firewall that enables smooth heterogeneous communications between the IPv4 nodes and IPv6 nodes based on the SOCKSv5 protocol is introduced, the architecture of translating IPv4 and IPv6 by applying the SOCKSv5 protocol is presented, there are two models of translating IPv4/IPv6 techniques and its mechanism, principle are more illustrated in details, an example for a SOCKS client securely transparent accessing to remote destination computer with different IP addresses is discussed. As well as the techniques of Direct Address Translation and DNS Name Resolving Delegation are developed , which it keeps the old SOCKSv5 firewalls' advantages, and shows another new characteristics. Therefore, the new firewalls technology are presented much wider application fields.     

File Intertransmission Based on WinSock Component

WinSock is a group of API,which is used to transmit data and exchange information on Internet,the Socket Application programme impoldered by users may communicate with other Socket Application programes by Internet. Delphi provides Socket components,which sustains the TCP/IP protocol and makes the Internet programming acquiring much more flexibility.This paper probes that how to realize transmission of files in any format under nonblocking mode between clients and servers by means of Socket components of Delphi.     

Feature Recognition Based on Vector Picture

The technologyof recognition and understanding architecture engineering drawings by computer is a study hotspot in the field that computer isapplied in engineering research. Based on the characteristicof architectural ichnographyand criterionof architectural design fires prevention, the recognizing identification method and main program based on DXF format is proposed. Experimental results show that it has a preferableautomatic recognition results on the architecture ichnography,and effectivelyimproves the work efficiency.     

XMPP应用于物联网通讯协议的研究

为解决物联网系统之间的信息交换、互联共享问题,探索一种以XMPP协议为基础的物联网通讯协议。本协议定义了物联网端、网关、服务器3个角色,服务器承担各物联网的信息记录、连接管理和信息路由等功能,网关承担不同物联网系统之间的互联互通,各物联网之间相互通信的指令和数据采用XML数据流,采用类似电子邮件地址结构进行寻址。该标准技术协议在农情监测系统中进行了试用,能同时采集不同物联网系统的数据,相互之间还能进行数据交换,可促进物联网系统的整合和综合应用。     

基于JSP的牛肉质量安全可追溯网络化系统研究

为了保障普通老百姓消费牛肉的安全性,并适应中国牛肉的外贸出口的需要,设计构建了网络化牛肉质量安全可追溯系统。此项研究采用JSP设计面向对象的动态网页,采用My SQL数据库,将管理系统放在互联网上,运用B/S（浏览器/服务器）体系结构,使牛肉跟踪与追溯系统网络化、普及化。使得生产、销售商以及普通消费者可以在网络上查询到每一头牛、每一块牛肉的详细信息,既保证了消费者的合法权益,也能在第一时间找到牛肉质量安全生产中出现问题的环节所在。     

京郊乡村旅游业态化的主导类型分析

以京郊旅游专家入户诊断式培训涉及的140个行政村为对象,运用最小方差法和空间分析方法,在全面分析各村包含的业态种类的基础上,对京郊乡村旅游业态的主导类型进行研究。结果表明,京郊乡村旅游业态化大多呈组合结构,以采摘篱园化和休闲农庄化为主,其次为休闲农庄和山水人家,且表现出明显的地域分布。多业态化结构及其分布深受地理区位、自然条件和产业投入等因素的影响。水元素是京郊乡村旅游业的重要符号。近年来出现的新的经营方式应当纳入新业态范畴。     

Realtime Collaborative Design System Based on AutoCAD

It is hard to realize the Realtime Collaborative Design due to the limitation of network bandwidth and some other reasons over Internet. A Realtime Collaborative Design System is constructed with complete distribution construction and concentrated distribution construction. Based on the research of outcome of the research group, the dynamic data format is modified and optimized, it reduces the load of network in collaborative design to meet the requirement of realtime and enhances the capacity of rapid response and stability of the system.     

城市公园灰空间研究——以哈尔滨太阳岛公园为例

"灰空间"作为一个建筑概念被提出,主要指连接室内外的过渡空间。近年来,灰空间也逐渐被应用到园林领域。基于建筑和园林灰空间的研究,提出了城市公园灰空间的定义,确定了其属性、形态、密度和类型,并以哈尔滨太阳岛公园内12处灰空间为研究对象,按形态将其分为4类,结合属性、密度、类型3个方面进行实例分析,以期通过分析对未来城市公园的设计起到积极的作用。     

Does access to internet promote innovation? A look at the U.S. broadband industry

Access to the Internet is an essential determinant of innovation, which has received little attention in the literature. This paper emphasizes the role of Internet accessibility in lowering information costs and therefore boosting regional innovation activity. We construct a simple theoretical model to illustrate the positive impact of decreased discovery costs, proxied by the accessibility of the Internet, on innovation. To test this hypothesis, we exploit a county‐level data set in the U.S. and run three types of regression with and without instruments: OLS, negative binomial, and Poisson. Within each method, we employ four levels of download speeds. We find a positive relationship between the access to the Internet and the number of patents filed in that specific county. This effect is particularly strong in the case of access to download speeds of 10 Mbps. Our analysis suggests that access to the Internet lowers information disseminating costs and therefore encourages more patents filed in the county. The results also indicate that access to the Internet matters more than faster Internet speed for innovation. Policy implications for these results suggest that if there were a minimum Internet access initiative, there could potentially be a significant increase in innovation by the U.S.     

Impacts of IT Advances and E‐commerce on Transportation in Producer Services

ABSTRACT Producer services have been among the most rapidly growing industries, as measured by employment, in the United States and in Europe in recent decades. The production and delivery of these specialized forms of service industry work require the use of transportation and communications systems in a variety of ways, including the physical movement of people working in these industries, as well as the movement of the information related to the production and distribution of their work. Some of this work is performed in localized markets, requiring travel between clients and suppliers in local transportation modes, such as auto, bus, or other types of transportation. Other work is done by specialists who travel interregionally and globally to do their work, primarily traveling to their clients. There is little knowledge of how these production relationships have changed with the advent of the Internet and the widespread use of e‐mail in the business production process. Within the framework of this STELLA initiative, this paper outlines research needs in this area, and frames an approach that would produce badly needed knowledge about impacts on the producer services of the Internet and related e‐commerce initiatives on physical transportation systems at a local to interregional scale.     

“Bad Neighborhood” and Internet Adoption in Poor Countries: What is behind the Persistent Digital Gap?

The paper investigates the determinants of Internet adoption in poor countries, focusing on the role of macro‐geographic location (neighborhood). It is argued that neighboring countries are interconnected by various kinds of spillovers, including knowledge spillovers as well as spillovers of norms and attitudes that affect individual adoption behavior. The empirical findings support the view that Internet adoption is affected by adoption rates in neighboring countries, even when controlling for a wide range of covariates. Addressing potential endogeneity concerns using an instrumental variable approach moreover suggests these relationships to be causal. The findings imply that international policies to support Internet adoption in poor countries might be more effective if they target groups of neighboring countries rather than single countries in order to better exploit spillovers between neighboring countries.     

Broadband Data Push-casting Technology and the Composition of the Transport Stream Based on Software

Digitalization of TV program becomes the trend. It is possible to provide broadband data service through DVB. The specifications about data broadcast of DVB are outlined in this paper. A detailed theoretical analysis is made on data carousels applied to data push-casting, and the software flow chart of the composition of MPEG-2 transport stream is also given. Data push-casting can provide better service than Internet for the local subscribers, and it is a good method to resolve the problems such as high cost, low speed of accessing Internet, and great investment of reforming HFC networks.     

基于无线传感器网络的精准农业研究进展

无线传感器网络是集传感器、微处理器和无线通信等技术为一体的多学科的综合性技术,是当今信息领域中的一个研究热点。通过简述无线传感器网络的国内外研究现状,概括其特点与结构体系,重点分析了其在精准农业中的应用,并展望了其发展趋势。认为以无线传感器网络技术为基础的农业物联网是精准农业的发展方向。     

基于ASP.NET的粮库虫害诊断专家系统

采用B／S／S三层体系建立系统，分层产生式规则更接近于人的思维，有效地表达了粮库虫害领域的知识；知识库与推理机分离使得维护知识更加快捷；自动生成界面简约、方便，易于操作；系统通过ASP．NET发布在网上，可以进行远程操作。     

Morphological characteristics associated with winter survival of five growth types of tetraploid red clover

Summary The aim of this study was to correlate flowering response of tetraploid red clover (Trifolium pratense L.) in the year of seeding with winter survival and other characteristics (vigour, bloom date). In two different years about 2000 plants of two different cultivars (Hungaropoly and Tapiopoly) were established and in the fall were classified into five growth types based on rosette formation and flower production. Non-flowering types were shorter and had few petioles at 6–8 weeks of age, but showed better survival than flowering types. Hungaropoly non-flowering types were more vigorous and bloomed earlier in the second year but Tapiopoly non-flowering types were less vigorous and bloomed later. Although non-flowering in the seeding year was associated with better survival in the second year, there was adequate variation within both types for selection for improved persistence.     

Urban–Rural Differences in Internet Usage,e‐Commerce,and e‐Banking: Evidence from Italy

ABSTRACT By reducing the cost of performing isolated economic activities in remote areas, information technology might serve as a substitute for urban agglomeration. The paper assesses this hypothesis using data on Italian households' usage of the Internet, e‐commerce, and e‐banking. The results do not support the argument that the Internet reduces the role of distance. Internet usage is much more frequent among urban consumers than among their non‐urban counterparts. The use of e‐commerce is basically unaffected by the size of the city where the household lives. Geographically remote consumers are discouraged from purchasing goods by the fact that they cannot inspect them beforehand. Leisure activities and cultural items (i.e., books, CDs, and tickets for museums and theaters) are the only goods and services for which e‐commerce is used more in isolated areas. Finally, e‐banking bears no relationship to city size. In choosing a bank, non‐urban customers give more importance to personal acquaintance than do urban clients, partly because bank account holders in remote areas are more likely to have taken out a loan from their bank.     

MVC模式在粮油检验信息管理系统中的研究与应用

随着Internet的迅速发展和Web技术的广泛应用,出现了许多基于Web工作方式和MVC设计模式开发的大型应用系统。通过分析目前流行的MVC模式的工作原理和性能特点以及研究基于MVC和浏览器/服务器（B/S）多层体系结构,在J2EE开发环境下采用JSP、Servlet、EJB等核心技术对粮油检验信息管理系统进行了框架设计。     

利用MISA工具对不同类型序列进行SSR标记位点挖掘的探讨

为扩大MISA工具(MIcroSAtellite identification tool)的适用范围,本研究尝试用MISA对其他类型的序列进行分析,探讨关键参数对分析结果的影响。研究收集了5 种类型的甜菜序列数据,探讨了不同类型序列适用的相关分析参数,以及不同参数对分析结果的影响。利用MISA工具分析了5 种类型的甜菜序列,其中4 种来自公共数据库,1 种来自课题组前期工作。结果表明在适当的参数下,配合适当的序列库格式化处理,MISA可以应用于不同的甜菜序列类型。可分析的序列库长度上限取决于去冗余工具的要求,并影响去冗余处理的时间和结果,重复单元长度的限定参数影响位点挖掘数量和引物设计成功率,序列长度的分布范围不影响分析。应用参数调整后的脚本,从5 种甜菜序列库中共挖掘出了SSR标记位点约8000 个。可知MISA的应用范围可以扩展,需要调整的关键参数包括2 项：序列库的长度上限与重复单元长度。建议序列长度在程序与硬件允许的情况下尽量长,重复单元长度根据研究目标调整。     

粮情检测系统打印格式及数据处理研究

现有的粮情检测系统打印格式过于固定,使用者无法根据自身的需要进行分析或编排,限制了使用者对粮温数据更充分的利用,从一定程度上也限制了粮情检测系统功能的发挥。本文通过对电子粮情检测系统的认真研究,采用一定的手段将OPI粮情检测系统内测得粮温数据导出,然后通过文本格式的转换,将粮温数据变成可以进行编辑的数值,根据不同格式的需要随心所欲地进行各种打印报告编排,通过改进,进一步提高了粮情分析效率,节省打印纸张,降低储粮成本。