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Four basic processes are analyzed in detail in network security decision,which are the base of NSDSS security decision. Then, developing strategies and methods are analyzed according to the objective and task of the system. Antetype method with RAD speciality is chosen to lead the developing process of the system. The structure of "Four-Base and Seven-System" of NSDSS is decided, based on which, the Function and Structure of Man-Machine Conversation system, General Management system, Data Base system, Model and Method Base system, knowledge base system, Causing and solving problems system are discussed. The basic theories and methods of each part are discussed. In the designing process of Model Base System, detailed analysis is given to the models of prediction, evaluation and management in the course of security decision. Moreover, basic process and method are discussed on question generation and solution. Then, detailed explanation is provided on the integration and implement of the system. After that, it is suggested that implement of the system should be carried through the process of the system.
论文首先对NSDSS涉及到的相关知识进行了讨论,详细分析了网络安全决策中的四个基本过程,这是NSDSS进行安全决策的基础;随后依据系统的目标和任务,对系统的开发策略和方法进行了分析,选择具有RAD能力的原型法指导整个系统的开发过程;确定了NSDSS"四库七系统"的整体结构;在此基础上,分别探讨了人机对话系统、通用管理系统、数据库系统、模型库和方法库系统、知识库系统、问题生成和求解系统的功能和结构,对各部件的基本原理和实现方法进行了论述;在模型库系统的设计过程中,对安全决策过程中运用到的安全预测、安全评估、安全管理等模型进行了详细的分析;仔细探讨了问题生成和求解的基本过程和方法;较为详细地阐述了系统集成和实施的有关问题,面向系统的成功实现,提出了将系统实施贯串于整个系统开发过程中的思想。
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The article first analysis on the natures of public welfare and nature of expressway ,makes a detailed analysis on the expressway's natures of inremovability、inseparability、cingulum、reticulation、and wear,demonstrates the importance of engineering projects of maintenance of expressway .
本文从分析高速公路的自然属性和社会属性入手,详细分析了高速公路的不可移动性、不可分割性、带状性、网状性及耐久性等自然属性,论证了高速公路养护在保持高速公路的自然属性方面的重要性,详细分析了高速公路的公路的规模收益特性、公路的资金密集性、公路的价值和使用价值、公路的国民经济基础性、公路发展的超前性、公路的社会公益性等特性,说明了高速公路在国民经济中不可或缺,同时也说明高速公路仍然具有局部的、一定程度的商品性,所以高速公路具有较复杂的特性。
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The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.
本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能,主要内容包括:利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系;详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念,进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系,即:△=-(40h+2180)ε+9.8;分析了该种结构的动力性能,并指出:在时域内采用直接积分法计算该种结构的动力响应时,应该考虑采用不引起振幅率减小的Newmark-β法,以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。
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New type of water chemistry for utility drum boiler and its principle and characteristic Two kinds of water chemistry's main principle and characteristic are detailedly analyzed. Against the problem of high eroding speed, high Fe content in feed water and boiler water, high scaling speed, short chemical cleaning interval, needing poisonous chemical deoxidant, etc for drum boiler's deoxidization water chemistry and difficulty of using oxidation water chemistry, a new type of water chemistry is put forward on the basis of analyzing the characteristic of whole power station's water steam cycle system, principle of two kinds of water chemistry and their practical effect in every cycle stage. Considering two water chemistry's merit, a new water chemistry called Limited Oxidation Water Chemistry is put forward, which is a local slight oxidization no-deoxidant water chemistry. And the proposed method's principle, control parameter, applying condition, start-lay up and emergency measures are initially calculated and analyzed.
三、新型汽包炉水化学工况的提出及其原理和特点详细分析了国内外现行两大类水化学工况处理的核心原理和特点,针对现行汽包炉还原性水化学工况处理所存在的系统腐蚀速度相对较大、给水和炉水铁浓度高、锅炉结垢速度快、机组酸洗间隔短、无法避免有毒化学除氧剂的使用以及氧化性水化学工况在汽包炉机组上应用的困难等问题,在详细分析电站整个水蒸汽循环系统的特点、两类水工况处理的原理和对循环中各段处理的实际效果等的基础上,综合两者的优点,提出了一种新型的局部轻微氧化性无除氧剂汽包炉水化学工况-"汽包炉有限氧化性水化学工况"处理原理,并初步计算、分析和确定了该种新型水化学工况的主要工艺控制参数、应用条件、启停与紧急情况处理等。
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Primarily, the thesis assays the condition of network framework, the network was divided into three levels in terms of network management in order to establish the distributed method ,and still pointing out the intention and denotation of studying the Topology Discovery.Next, the thesis analyzes SNMP protocol minutely, including its development, principle, and the Network Management system that established on the SNMP protocol. Have analysed MIB in detail and the application way of MIB in network management .The thesis also assays the ICMP protocol, describing its working principle and the format of datagram minutely , and describing two important tools of ICMP- Ping and TraceRoute in detail. On the base of upper analysis, the thesis expounds a kind of distributed Topology Discovery project, and book it in one autonomy system. Topology Discovery was divided into two levels in terms of network management, and analyses the way of linking up between the two level. The thesis minutely assays Router-Level Topology Discovery technology basing on SNMP and Subnet-Level Topology Discovery technology basing on ARP and ICMP. According to these analyses, the thesis explores the specific methodology and the technology of XML data object which using the WinSNMP API to achieve topology discovering system on the development platform of Visual C++, and also analyses the technology of topology analysis and topology graph minutely. Moreover, the thesis assays the technology of basic firewall and Topology Discovery response strategy. Finally, the thesis analyses the underlying blind problem of the topology finding, and also analyses the reason that the blind problem produced and the way that reduced. The distributed algorithm that this paper puts forward has a certain directive significance in wireless network or other fields.
本文首先分析了网络结构状况,将网络从网络管理的角度划分为三个层次,为分布式的方法奠定了基础,同时还指出拓扑发现研究的目的及意义;接着本文分析了SNMP协议,详细分析了SNMP协议的发展状况,协议的工作原理,以及由SNMP协议基础上建立的SNMP网络管理体系,详细分析了MIB,以及MIB在网络管理上的应用方式;本文又分析了ICMP协议,详细描述了ICMP的工作原理和数据报格式,并详细描述了ICMP的两个重要工具-Ping 和TraceRoute;然后本文在结合上述分析的基础上,提出了一种分布式的拓扑发现方案,将拓扑发现拟订在一个自治系统内,将拓扑发现从网络管理角度划分为路由器级和子网级两个层次,分析了两个层次之间的衔接方式,同时从拓扑地域的角度将拓扑发现过程分布化,分析了分布式算法的具体方法和分布式结点之间的数据通讯方法,本文详细分析了基于SNMP的路由器级拓扑发现技术和基于ARP和ICMP的子网级拓扑发现技术;根据这些分析,本文利用XML数据对象作为分布式算法中的数据对象,分析了XML的技术,本文使用Visual C++开发平台实现网络拓扑发现系统,详细分析了使用WinSNMP API实现基于SNMP的路由器级拓扑发现和基于ARP的子网级拓扑发现,分析了使用Winsock编程实现基于ICMP的子网级拓扑发现,本文还对拓扑分析和拓扑图的绘制技术作了较细致的分析;本文最后还分析了基本防火墙技术,分析了几种类型的防火墙对拓扑发现带来的影响,以及在拓扑发现时的应对策略,本文还分析了拓扑发现中可能产生的盲点问题,分析了盲点产生的原因以及拓扑发现中减少盲点的方法。
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Based on the further study of deformation rule of MgO-mixed concrete, the theory of 3-D finite element simulation analysis of MgO-mixed concrete arch dam is discussed in this dissertation combining with the example of YangChun MgO-mixed concrete arch dam. Moreover, the pertinent simulation analysis software is developed by the author and his colleagues. The main contents are as follows.( 1 ) Transformation rules of MgO-mixed concrete are studied. Hyperbola model of MgO-mixed concrete"s autogeny deformation, especially deduce of the model"s parameter and building process of the model are analyzed in detail.
本文结合阳春外掺MgO混凝土拱坝,在深入研究外掺MgO混凝土变形规律的基础上,详细论述了外掺MgO混凝土拱坝三维有限元仿真分析的原理,与相关人员一起研制了有关仿真分析软件,其主要研究内容如下:(1)研究分析了MgO混凝土的变形规律,并重点对MgO混凝土的自生体积变形的双曲线模型,尤其对模型中参数变量的推求及模型的建立过程作了详细分析。
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So its important for network managers to develop system to monitor network traffic, attacks and resources. It will help network managers to manage network more effectively.The article analyzes two normal approaches to realize network monitor, one is based on packets captured and another is based on logs generated by network gateway. Then, it introduces the three common kinds of log format, syslog, traffic log and WELF.
本文首先分析了网络监视系统实现的常用技术,基于包捕获的技术和基于网关设备日志分析的技术,接着详细分析了三种通用的网络设备日志——Syslog格式日志、Traffic Log格式日志与WELF格式日志,在此基础上详细介绍了本文的重点,基于网关日志分析的网络监视系统一LNMS (Log-based Network Monitor System)的设计和实现。
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At first This paper formulates the necessity for depurating network information content,and introduces the history of information security and study point in information security.Also this paper analyses in detail the key technology of content filtering such as data frame capture,bridge, network protocol analysis and content analysis.And then this paper comes up with the solution for content filtering facing application layer which is based on the technology of protocol analysis and format conversion in combination with text filtering techonology of Multiple Patterns Matching..Also this paper amplifies on the design and the implement method of each module.Finally this paper introduces how the client of content filtering system manages the keywords and log and makes suggestion for the improvement of the system.
本文首先阐述了对网络信息内容净化的必要性,介绍了信息安全的发展过程以及当前信息安全方面的研究重点,详细分析了内容过滤的关键技术,如数据帧捕获、网桥、网络协议分析和内容分析等方面的技术,然后提出了在Windows2000下实现基于协议分析技术,结合多模式匹配的文本过滤技术,面向应用层的内容过滤解决方案,并给出了内容过滤引擎的详细设计以及各个模块的实现方法,最后介绍了内容过滤系统客户端对有害信息关键词和日志的管理以及对本系统改进的一些建议。
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The sketch and specific design approaches of mid-block street crossing are generalized and three management and control modes are discussed. Based on extensive investigation and survey, the paper analysis the arriving laws in different land-use condition and the traffic characteristics of different crossing entities under different control modes. The initial characteristic, the speed and dispersion of the mobile flow are also intensive studied, as well as the effect of mid-block street crossing. Establish the linear planning models on the coordination between the signals of mid-block crossing and intersection. Finally the evaluation of the model output is carried out from time saving results, safety, economic results and social results. Set the example of Taiping north road in Nanjing, surveying the traffic situation, applying the method of signal coordination between the mid-block crossings and intersection to realize the south-to-north signal coordination design. The evaluation results show the coordination plan are more superior to the current signal plan.
本文首先阐述了行人过街物理设施的概略设计和详细设计方法,讨论了路段人行横道的三种交通管制方式的设计方法和实用条件;其次,在充分的实际调查基础上,详细分析了不同用地性质条件下的过街需求的到达特性和不同交通管制下不同过街实体的交通特性,分析了进入路段的机动车初始流特性,并对机动车在路段中的车速特征、离散性以及路段信号控制人行横道对机动车流的影响进行了研究;然后,根据以上分析的过街交通和机动车交通的交通特性,建立了路段行人过街信号与交叉口信号协调控制的线性规划模型;最后,对模型输出的协调控制方案进行了效益评价分析,从时间效益、安全性、经济效益和社会效益四个方面,定量和定性相结合地对其实施效果予以评价;以南京市太平北路路段为例,根据现状交通状况,应用行人过街信号与交叉口信号协调控制的方法,对该路段由南向北方向进行单向协调控制设计,并进行方案效益分析评价,提出了优于现状控制方案的人行过街信号与交叉口信号协调控制方案。
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The main work of this paper: Firstly, Basing on the summarization and analysis of the walking mechanism, Parallel drive five-bar mechanism is applied for walking mechanism. And then the characteristic of the trail and positive kinematics as well as reverse kinematics are discussed. Secondly, the model of walking mechanism is established according to Parallel drive five-bar mechanism, and then a figure planning is designed for the foot-end trail. The characteristics of the parallel drive are emphasized to research in this paragraph by the method of insert value. At last, the simulation is performed in the ADAMS to compare the real result to the theoretical value. Thirdly, a sealed structure of a Quadruped Walking Robot is designed and established. The whole control system, including motor, sensor and control circuit, is sealed in the robot. Walking is derived in the way of the shaft driving and the dynamic torque sensor is used to the surrounding conditions of the robot's foot-end to be the foundation of the robot's control. At last, the applying principle of the dynamic torque sensor is researched in detail basing on the traditional sensor of the walking robot. Moreover, the principle is divided into several sorts to discuss. Finally, simulation and verification of the monitor principle are come through in the Mechanism of the Pro/Engineer.
论文的主要工作有:在对传统步行机构总结分析的基础上,提出将平面并联五杆机构应用于四足步行机器人的腿部结构,并对其轨迹特性、正运动学、逆运动学特性做了详细计算分析;依据平面并联五杆机构的模型,建立机器人步行机构的实体模型,对其足端的轨迹做了图谱规划,并利用插值法对并联驱动端的特性曲线作了研究,并在ADAMS中进行仿真,将结果与理论值相比较;然后设计了一套四足步行机器人密封装配结构设计方案,建立四足步行机器人单足结构、驱动以及传感器监测的三维实体模型,将机器人的整个控制系统,密封装配在步行机器人的机体中,通过轴传动来驱动步行机构实现步行,采用动态扭矩传感器监测步行机构的驱动关节受到的扭矩变化,从而获得四足步行机器人足端的周围情况,为步行机器人的控制方案奠定了基础;论文的最后在分析步行机器人传统控制传感器的基础上,详细分析了动态扭矩传感器的监测原理,并分几种情况分别分析了其监测原理,并在Pro/E的Mechanism模块中实现了监测原理的仿真与验证,最后给出了传感器监测信息与系统判断之间的关系。
- 更多网络解释与详细分析相关的网络解释 [注:此内容来源于网络,仅供参考]
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address mapping:位址对映
ARM记忆体管理单元(MMU)表格显示功能可以同时呈现实体与虚拟位址和保护资讯,进而显示位址对映(address mapping)的所有细节. 筛选与排序功能协助程式设计人员针对特定的区域、处理程序或记忆位置执行详细分析.
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almandine:铁铝榴石
其化学成分和岩浆成因的石榴子石的化学成分截然相反,而和本文借助电子探针详细分析了研究区古元古代 花岗岩中的石榴石化学成分,发现花岗岩中的石榴 石化学成分均以铁铝榴石(Almandine)和镁铝榴石(Pyrope)为主,
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Banding:条带
由于交流电的能量按照正弦波的形式周期性变化,当外界光源为灯光时,在曝光时间不满足交流电能量周期的整数倍的情况下,会使图像亮度随着行数的变化产生周期性变化,动态的图像看起来有条带(banding)在表面闪烁,即产生flicker.本文详细分析了flicker产生的原因,
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detailed design:详细设计
如图,涉众需求(Stakeholder/User Requirement)、系统需求(System Requirement)、概要设计(Architectural Design)和详细设计(Detailed Design)体现该研发团队捕获和分析需求的层次;而对应的需求层次会有对应的测试去覆盖,去验证.
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dimensional analysis:维量分析
而且,OLAP 扩展为 DB2 而存在,它将维量分析(dimensional analysis)带入数据库引擎,这一点我将更详细地讨论. 空间分析. 空间代表一个广阔的分析画面所需的分析锚的一半;时间则代表另一半. 我所描述的仓库包括时间和空间的基础. 时间戳按时间锚定分析,
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The film has been minutely dissected by the critics:影评家对这部电影做了详细的分析
4423. Commentators are still dissecting the el... | 4424. The film has been minutely dissected by the critics. 影评家对这部电影做了详细的分析. | 4425. According to the result of the dissection, the ma...
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pedigree analysis:系谱分析法
系谱分析法(pedigree analysis)是了解遗传病的一个常用的方法. 其基本程序是先对某家族各成员出现的某种遗传病的情况进行详细的调查,再以特定的符号和格式绘制成反映家族各成员相互关系和发病情况的图解,然后根据孟德尔定律对各成员的表型和基因型进行分析.
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pedigree analysis:系谱分析
系谱分析(pedigree analysis)是了解遗传病的一个常用的方法.其基本程序是先对某家族各成员出现的某种遗传病的情况进行详细的调查,再以特定的符号和格式绘制成反映家族各成员相互关系和发生情况的图解,然后根据孟德尔定律对各成员的表现型和基因型进行分析.通过这样的分析,
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Survival analysis:生存分析
生存分析(Survival analysis)为您识别出短期内食品行业解决方案有可能流失的客户,这样您就可以及时采取行动维持他们的忠诚度. 使用一般线性模型(GLM)过程,根据产品特性和购买相关变量测定出关键字段;然后基于背景特性详细描绘那些字段.
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zeus:宙斯
近日,著名安全厂商卡巴斯基实验室发表了一篇技术分析文章,详细分析了一种名为"宙斯"(ZeuS)的木马所引发的互联网疫情. 宙斯木马是一种传染性非常强的恶意软件,在全球各地的计算机上都能够看到它的身影.