基于P2P的电子商务应用模式探讨

本文根据现有电子商务发展状况,探讨了如何将P2P对等通信应用于电子商务中,以实现动态集成的电子商务.基于P2P的电子商务模式结合了P2P与传统服务器模式的优点,在现有网络的基础上,整合IT技术,为商务主体提供了直接进行交互的方式,并通过服务器进行协调监控.     

电力系统调度员多通信媒体交互平台研究

为解决电力系统调度员使用电话通信中存在的过程难以保留、信息屏蔽、输入手段单一等问题,依据IM以及BBS的原理建立了一个基于计算机网络的调度员多通信媒体的交互平台.针对电力系统的调度特点,在该平台中设计了即时通信系统和信息发布与查询系统两个子系统,对其构成和实现方式进行了深入的探讨.该交互平台具有支持文本交互、提供多种途径的交互手段、支持多人即时通信、结合我国调度模式和减轻调度员负担等特点.与原来的电话交互相比,该平台所具备的特点将有助于实现信息过程保留、解除信息屏蔽、支持多人交互及交互手段多样等特点.     

E-Navigation系统中的MIP-AIS技术

为解决内河与沿海非公约适用船舶的避碰和安全航行问题,弥补现有基于VHF通信方式的AIS系统在该领域应用的缺陷,提出一种基于公众移动IP网络的AIS技术(MIP-AIS).研究实现基于MIP-AIS技术的两种船舶自动识别模式-S-C模式和S-S模式,以及其对通信网络带宽的需求模型.仿真试验与实际系统的实现均表明:MIP-AIS技术可经济可靠地提供沿海船舶与内河船舶之间以及船舶和MIP-AIS控制中心之间的信息交互;基于S-S模式的船舶自动识别系统的信息传输性能优于基于S-C模式,但是前者的船载终端设备的复杂度要高于后者.     

一种新的快速鲁棒多摄像头目标跟踪方法

多摄像头(视角)目标跟踪系统中,由于视角间存在大量信息冗余可有效提高跟踪鲁棒性.但在传统基于模板匹配方法中,由于视角不同导致匹配不准,会带来较大跟踪误差.针对这个问题提出了一种基于卡尔曼滤波的在线目标信息时空交互算法,利用多摄像头几何限制,实现多个摄像头的信息交互,减少了模板匹配的搜索范围,进而降低了多摄像头目标跟踪算法的计算复杂度.同时通过在线估计卡尔曼滤波模型中噪声功率,并且自适应调整卡尔曼增益将信息交互过程中误差传递降至最小.仿真结果表明,该方法可以实现更鲁棒的目标跟踪.     

网络编码混淆方法研究进展

以数据为中心的网络交互模式和拓扑结构动态变化的移动互联网使传统的匿名通信面临新的挑战,网络编码的提出为改变这一现状提供了新的思路.在研究传统匿名通信方法的基础上,首先对基于网络编码匿名通信的原理和特点进行了总结,其次对匿名路由协议的设计、全局编码向量的隐藏等层面的研究现状进行了分析,最后给出了网络编码混淆方法的研究展望.     

社会事件建模研究综述

对事件建模进行定义与说明,给出不同出发点下的研究分类。在抽取方法方面,回顾和分析基于模板生成网页的社会事件建模、不同驱动模式的机器学习引入和用户交互行为模型的3种技术方法的研究动态与进展;在不同驱动模式机器算法引入方面,重点阐述和讨论事件元素和事件实例研究领域的研究动态。介绍用户交互行为模型在事件建模中的应用,总结社会事件建模的现有成就和不足,提出社会事件建模研究可能面临的问题,对其发展前景进行展望。     

可信的网络交互模式设计与实现

为了充分利用信任关系来建立网络交互模式,提出了基于信任的基础交互模式及其模糊产生式规则,建立了交互事件确信度和整体交互模式确信度等概念,进一步提出了基于基础交互模式的网络交互模式的搜索算法和更新方法。模式的搜索算法是基于堆栈的深度优先搜索算法的,整体交互模式的主动更新是根据用户的需求进行改进,被动更新是根据交互实体信任关系的变化和交互事件的增减对模式进行更新。理论分析和实验结果表明,该方法可以快速建立可信的整体交互模式和更新整体交互模式的确信度。     

一种基于模板的管理Web页面用户交互表单的方法

提出了一种用于处理Web页面上的用户交互表格的元数据模型:模板模型.模板模型可以支持用户交互表格的集合语义,而且可以维护其层次结构.这种模型可能重用网页中的部分组件从而更容易的生成和维护网站页面中的大量用户交互表格.模板模型还可以帮助实现对于交互表格的查询.     

基于VxWorks的实时通信模块设计

一种基于VxWorks操作系统的实时通信模块,以PC104开发板为硬件平台,软件基于VxWorks实时操作系统。利用以太网、ISA总线等通信方式实现内部信号处理模块与外部其他模块的信息交互。着重介绍了实时多任务的设计流程,设计实现了ISA总线方式的数据通信和单点对多点的网络通信模式。     

现代远程教育系统应用研究

远程教育是随着现代通信技术和信息处理技术的发展而产生的一种以多媒体交互为主的新型教育模式.它突破了传统学校教育在时间和空间上的限制,有效的发挥各种教育资源优势,实现教育资源的共享.这种教育模式逐渐成为构筑知识经济时代人们终身学习体系的主要手段.本文对现代远程教育的特征、内涵、发展方向以及相关技术进行综合论述.通过分析某大学硬软件资源,教学对象,网络环境,设计出基于三网融合的实时交互远程教育系统.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with