入侵检测技术综述

根据检测技术的不同，入侵检测系统可以分为误用检测、异常检测和数据完整性分析．不同的检测方法各有其优缺点，因此得出一个结论：只有将不同的检测技术集成，才能提高入侵检测系统的性能．     

出钢口下渣检测系统

介绍了新研制的转炉炼钢出钢口钢渣检测系统，阐述了检测原理和检测系统的硬软件结构，实验结果表明该系统达到了技术指标要求，其占空比＜５％。     

快中子飞行时间法检测隐藏爆炸物系统

利用具有位置灵敏且伴随ａ粒子探测器的快中子飞行时间谱技术，建立了隐藏爆炸物检测系统，能够同时测定待测物中的Ｃ，Ｎ，Ｏ３种元素，以确定炸药的存在；并具有较高的空间分辨率。此系统检测爆炸物，其漏检率、误检率低，检测灵敏度高。用此系统对多种炸药和有机物品进行了测量，其测得的复杂γ谱用人工神经网络进行识别，能够将炸药和普通有机物品区分开。此系统检测炸药的灵敏度为 ３００ ｇ。     

人工智能在入侵检测系统中的应用

人工智能和入侵检测技术的结合，将克服入侵检测系统的一些缺点，同时对人工智能技术本身也有很大的推动力。介绍了在入侵检测系统中出现的主要人工智能技术，并讨论了其在入侵检测系统中所起的作用。     

数据挖掘技术在网络入侵检测中的应用

论述了入侵检测系统的基本概念，针对目前入侵检测系统中存在的问题，提出了一个基于数据挖掘技术的自适应入侵检测系统模型。介绍了该系统模型的基本思想，阐述其结构及主要功能，着重分析了该系统的数据挖掘和检测过程。利用数据挖掘技术自动地从大量数据中提取重要的特征和新的模式，生成有意叉的规则并建立检测模型，实现对分布式拒绝服务攻击DDoS（Distrbute Denial of Service）入侵的检测方法。     

纱线强度测量系统的设计与实现

提出一种纱线强度测量方法，设计了单片机纱线强度测量系统．系统采用AT89C51作为纱线强度测试仪的检测与控制核心，扩展了键盘输入、数码管显示、电机驱动、图数检测及纱线断裂检测等5个电路模块，编制调试了其系统软件程序．系统可以替代人工手段检测纱线强度的特性参数，从而界定纱线的品质，有效提高纺织品的质量和稳定性．     

超声无损检测机械手的设计与实现

为了解决由平面、弧面、球面等组成的零部件的超声无损检测问题，提高检测的自动化程度和可靠性，提出了基于机械手的超声无损检测系统。借助于超声检测技术、机器人技术、数字控制技术、计算机技术等，研制了一种用于超声无损检测的机械手。该机械手由机械系统、控制系统、伺服系统、检测系统等组成，通过PC机控制，能够实现自动控制并实时获取坐标信息，有利于缺陷的定位、定量和定性分析，其结构简单，性能价格比高，不仅能够用于超声无损检测，而且也可以用于其他场合，具有广泛的适应性。     

入侵防御系统

入侵防御系统(Intrusion Prevention System，IPS)又称为入侵检测与防御系统(Intrusion Detection ＆ Prevention，IDP)，是集防火墙和入侵检测、入侵防御为一体的网络安全技术。既可以进行入侵的检测，又可以进行实时的防御。当检测到入侵发生时，通过一定的响应方式，实时地阻止入侵行为，并阻止其进一步发展，保护信息系统不受实质性攻击。     

SCDMA编码系统中MUD技术的应用研究

从Turbo编码的同步CDMA系统中多用户检测技术的应用着手，重点研究了多步联合检测技术和迭代多用户检测技术，并在仿真结果的基础上把2种技术结合起来，提出了一种新的检测技术，相对于单纯的MSJD，其系统性能将大大提高，相对于单纯的迭代多用户检测，运算量也将大大减少。     

串匹配型入侵检测系统的改进

针对当前串匹配型入侵检测系统普遍面临的误报率漏报率高、自身的性能难以适应快速增长的网络流量需求等问题，本文以提高检测的速度和准确率为目的对串匹配型入侵检测系统进行分析，从串匹配算法、规则库结构等方面对其进行改进，并提出了具体的方案。     

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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