基于5G移动网络技术的人影数字终端功能扩展

依据人工影响天气业务发展需要,该文结合第一代人影数字终端的功能与技术特点,探讨了如何在5G移动网络技术的发展情况下,实现人影数字终端的功能提升以及业务扩展需要的实现方式;并结合第一代人影数字终端的特点和5G技术特点和应用,分析如何扩展基于5G技术的人影新终端的功能扩展,实现视频、数据、作业指令互联,提升人影指挥作业能力。     

基于网络功能虚拟化的网络切片管理方案

随着5G愿景和概念的清晰,网络切片已逐渐成为解决多种使用场景的潜在方案;但在多个网络实例共存的情况下,网络的管理和用户对网络的附着将面临诸多问题。基于5G的发展趋势与其关键技术,提出一种以网络切片管理器为核心的管理方案。借助网络功能虚拟化技术实现网络切片创建与修改的完全自动化;在多个网络实例共存的情况下,网络切片选择模块辅助用户实现网络附着。该体系将网络分为了基础资源、网络实例和业务三层;并形成开放的平台,使得每一层都将可以单独作为服务进行出售、租赁和管理。这将改变现有电信领域的商业模式,并为其运维带来更多的灵活性。     

基于5G网络的工业产品识别系统设计

针对工业产品识别准确度的不足,提出一种基于5G网络的工业产品识别系统框架。在传统卷积神经网络CNN基础上,提出DNN深度神经网络算法,并引入控制参数k_p实现采集数据的变换特征映射;基于5G网络传输和加密,实现实时数据传输和保密通信;基于云平台,使用Pytorch进行物体识别的匹配运算;最后开发了一套基于5G网络的工业产品识别与溯源平台,验证本设计的实用性。结果表明,本系统对于工业产品识别具有很高的准确率和识别效果。     

分析化学计算机网络考试系统

本文介绍用于分析化学考试的计算机网络系统，该系统在UCDOS5．0中文平台上，利用Turbo-Basic和Foxpro2．5混合编程，模拟传统的标准化笔试，利用Novell网络，进行多卷联网实时考试，实现了成卷、批卷、试卷分析全程自动化的无纸化考试目标。     

基于防火墙的网络入侵检测系统

提出了一个基于防火墙的网络入侵检测系统模型,克服了传统入侵检测系统不能实现主动控制的缺陷,并对设计与实现中的关键技术做了详细的描述·该系统在数据链路层截取实时的数据包,对其进行基于安全策略的访问控制分析;同时利用事件发生器从截获的IP包中提取出概述性事件信息并传送给入侵检测模块进行安全分析·入侵检测模块采用基于统计的入侵检测技术,并采用了NaiveBayes算法·基于该模型设计实现的系统在实际测试中表明对于具有统计特性的网络入侵具有较好的检测与控制能力·     

基于网络环境下的信息资源整合模式探析

分析了网络用户信息环境下的变化和用户信息需求的变化,在此基础之上提出了图书馆门户的5种服务模式以及为实现这些服务图书馆门户系统应当具有的功能构成。     

基于以太网的列车通信网络冗余结构可靠性分析

列车通信网络是轨道车辆可靠安全运行的重要保障,具有可靠性高、实时性强、故障切换与恢复时间短等特点.提出基于PRP和HSR的列车通信网络结构,实现网络故障零恢复时间.在此基础上依据系统可修性和功能相关性及冗余性特点,采用DFTA对其进行可靠性建模;引入BDD和Markov矩阵分解静态子树和动态子树以优化传统故障树分析的计算量;针对具体算例对PRP、HSR、RSTP协议的可靠性指标进行量化求解与对比分析.研究结果表明:提出的PRP与HSR冗余结构和RSTP相比,平均故障间隔时间分别增长了5 764h与5 269h,有效提升了网络可靠性.     

合理架构校园网络的分析与研究

在分析校园网络现存问题的基础上,依据提出了把网络分层管理的构建方法,并对每层功能及实现进行了详细的研究;通过合理的划分网络层次,实现更科学的管理校园网络。     

网络电子海图系统

研究利用成熟的网络地理信息技术和GeoBeans5．5工具软件,建立网络电子海图系统的技术方案,实现在互联网上通过通用的网络浏览器,浏览、查询和获取基于电子海图的空间数据及其相关的业务属性数据的地图服务．从技术的角度对系统做了简要的介绍．     

基于Web的网络教学系统

首先讨论了基于Web网络教学系统的结构框架和设计 ,并着重分析了教学课件模型设计的中心环节以及环节的功能和相互关系 ;其次 ,讨论了实现网络教学的Web环境 ,最后分析了该模型设计的特点     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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