基于复杂度算法的安全指标分配分析

城市轨道交通信号工程建设过程中,信号设备供应商需要将业主设定的总体运营安全指标分配给信号系统的各个子系统.首先分析城市轨道交通信号系统的体系架构、安全功能和安全指标,然后针对设计的三种安全指标分配方法,分析这些方法的具体要求和原则,结合系统架构、安全逻辑模型和具体工程建设参数,利用三种不同方法,将整个系统总体安全指标分...     

浅析云计算用户数据传输与存储安全

云计算是目前IT领域一项新兴技术,随着该项技术的发展,其安全问题备受关注.本文从云计算体系架构分析入手,对用户数据进行了简要分类,对云计算工作流程和安全风险进行了简要分析,以数据加密为重点,同时兼顾第三方安全手段发展和行业法律法规及技术标准建设提出了安全保障策略.     

区块链风险与安全问题研究——从技术架构的角度

当前,区块链技术正在改变不同领域的应用场景和运行规则,成为发展数字经济、构建信任经济体系的重点前沿技术之一.因此,预见性思维来认识区块链技术风险和应用安全,具有现实意义.构建了一个区块链技术参考架构,并从架构的角度对区块链不同层面上的风险和安全问题进行分析,提出一些区块链安全应用的应对措施.     

Web GIS安全架构的设计与实现

在分析WebGIS安全威胁的基础上 ,按照PDR(Protection ,DetectionandResponse)模型 ,提出了具有安全防护、入侵监测、攻击反应和事故恢复功能的WebGIS安全体系架构     

论电子政务安全管理体系建设

通过“十二五”以来电子政务发展的回顾,结合国际社会电子政务发展形势和我国电子政务建设的实际,分析电子政务发展的基本趋势.基于此,提出电子政务安全管理体系的建设目标、体系架构以及主要建设内容,其中对电子政务安全的解决方案-集中管理与应急响应中心进行了系统设计.     

IMS网络安全技术初探

本文主要介绍了IMS网络可能面临的安全隐患和现有的安全体系架构，并对接入及核心侧网络安全机制作分析。     

IMS网络安全技术初探

本文主要结合OSI七层架构分析介绍了目前IMS网络中可能面临的各类安全威胁及其典型攻击手段,同时针对这些威胁对IMS接入侧及核心侧网络的安全体系、机制做了较具体的介绍分析。     

可信网络架构安全模型的设计与实现

可信网络架构安全模型是针对用户现有的网络安全资源进行有效整合和管理的。阐述了可信网络架构的概念,介绍了可信网络架构安全模型的设计,探讨了可信网络架构安全模型的实现,重点讨论了体系中新引入的安全机制以及用于安全资源整合的相关机制。     

基于GBA的TD-MBMS网络安全体系研究

手机电视是TD-SCDMA系统的关键业务,3GPP R6版本中引入多媒体广播组播业务(MBMS)。安全在TD-MBMS多媒体组播业务中至关重要,介绍了通用自举架构(GBA),分析了基于通用自举架构的TD-MBMS业务安全体系架构和密钥管理体系,并讨论了该安全体系的优势和不足,结合组播特点给出了改进建议。     

基于白名单与主动防御混搭的安卓终端安全应用研究

在安全关注程度极高的安卓终端无线组网模式下,提出了白名单与主动防御混搭的安卓终端安全防御体系.对防御体系架构和技术架构进行了设计和梳理,并对安卓环境下的防御链、杀伤链、管理链进行了研究和分析,提出并实现了以权值为基础的行为分析算法,并在Android 5.x、Android 6.x进行核心算法验证,有效的提高了终端安全性能.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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