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In this paper, the concept of network security and security structures of OSI and Internet is introduced, and various threats confronting the computer network are also discussed. Several kinds of network information security technologies, including firewall technology, virtual private network, intrusion detection system, data encryption technology, identity authentication and security protocol etc. are also examined. The security of internal network is the biggest problem in the construction of each network. The solution to this problem lies in setting up a firewall. The theory of a firewall and the approach to its actualization is studied. Intrusion detection system, an important part of the computer network security system, has gained extensive attention. IDS monitors the computer and network traffic for intrusion and suspicious activities. It not only detects the intrusion from the extranet hacker, but also the intranet users. The emergence of virtual private network paves the way for realizing secure connection of LAN quickly and at a relatively low cost. The concept, function, key techniques, including the tunnel technology, and the ways to realize VPN are expounded in this paper. Also introduced is the data encrypt network technology, which is called the soul of computer network security, such as digital digest, digital signature, digital certificate, digital encrypt arithmetic and so on. At the same time, the principle and the process of implementing network security by digital certificate and digital signature, the basic principle and characters of security protocols, and finally, three of the security protocols, concerning the security problems in network, IPsec, SLL and SET are analyzed in detail Computer network system should be a system of dynamic defence, both dynamic and static, passive as well as active, and even offensive, combined with management and technology.

本文系统地介绍了网络安全的概念、OSI及Internet的安全体系结构，并讨论了计算机网络面临的各种安全威胁；内部网络的安全问题是每个建网单位面临的最大问题，可以认为防火墙技术是解决网络安全的一个主要手段，本文研究了防火墙的原理及其实现手段；作为一种主动的防御措施，入侵检测系统作为网络系统安全的重要组成部分，得到了广泛的重视，TDS对计算机和网络资源上的恶意使用行为进行识别和响应，不仅检测来自外部的入侵行为，也监督内部用户的未授权活动；虚拟专用网技术的出现，为实现网络间的连接提供了快速安全但又相对便宜的手段，本文较深入的探讨了实现VPN的隧道技术，并对VPN的概念、功能、实现途径、基本构成、关键技术及发展前景等问题进行了全面论述；数据加密技术是网络安全核心技术之一，本文从数据加密算法、数字摘要、数字签名及数字证书等几方面简要介绍了数据加密技术，并分析用数字证书和数字签名实现网络安全的原理和过程；对安全协议的基本原理、主要特点进行了较为深入的研究，并就网络的安全性问题剖析了三种安全协议：IPsec协议、SLL协议和SET协议。

G. speech perception and understanding. These stages are described and interpreted in terms of the findings from recorded corpus and questionnaires in education. As for speech production, students' speech motives are explored in detail. Speaker's speech intention is interpreted in connection with listener's reception of it. Findings are presented to show that, in the course of formulating speech plan, the previous sentences is often processed, the construction of sentence is a process of accumulative expansion of speech items through sequential or inversive appending or insertion, and the interaction between long-term and short-term speech plans often occurs.

本文运用录音语料、问卷调查材料具体分析了师生在言语生成、言语理解各阶段的特点和规律：在言语生成方面，本文探讨了学生的言语动机及其分类；结合言语意图的领会考察了言语意图；发现在制订言语计划过程中，常常出现对所听话语的处理加工，语句的建构是一个语项累加扩展过程，这种累加可以是顺序的，也可以是插序或倒序的，言语计划的制订还表现为预定计划与即时计划的相互作用；考察了言语计划执行过程中的一些现象，如制订计划与执行计划的交替、执行计划的中断等，并分析了产生这些现象的原因。

Secondly, according to the construction and characteristic of the N-isopropylacrylamide and the temperature-sensitivity of PNIPA hydrogel, Pdualistic hydrogel was synthesized by microwave low temperature plasma. The effects of the factors on the swelling characteristic of P dualistic hydrogel, such as treatment time and power of plasma, concentrations of crosslinking agent and total monomers, proportion of AMPS, polymerizing temperature etc, was discussed in detail. The three dimensions structure , thermostability , reversional volume , swelling/deswelling kinetics, temperature-sensitivity and pH-sensitivity of the hydrogel were also investigated. The optimal synthesizing technics of P dualistic hydrogel initiated by microwave low temperature plasma was confirmed.

在此基础上，结合NIPA的结构特征和PNIPA的温敏性，用微波低温等离子体引发聚合了P二元智能凝胶，详细探讨了微波低温等离子体处理功率、处理时间、总单体浓度、AMPS单体浓度、交联剂浓度及聚合反应溫度等因素对P二元凝胶溶胀性能的影响；并对其三维交联结构、热稳定性、失水-吸水动力学、温度敏感性、pH敏感性、体积复原性等进行了研究；确定了适合微波低温等离子体引发聚合P二元智能凝胶的最佳工艺。

This text regards development of the personnel management subsystem in the management information system construction of enterprises as the background,Have described the concept of the management information system,Basic principle and method of structure and system development, The full text is divided for the preamble altogether, the management information system survey , development approach, developing platform , tool and system plan and analyse , realize , operate and maintain , appraise systematically systematically systematically, procedure debug with trouble dealing with , developing 9 chaptering of summarizing etcThis text has explained the basic conception of Visual Basic 6.0 at first; Then the basic function of " administrative system of the personnel " taking technology of the database as technological background of elaboration and course of realizing, introduced the design of the software and realized the network analysis of exposition , technology and application of the design systematically in detail especially finally

本文以企业管理信息系统建设中的人事管理子系统的开发为背景，论述了管理信息系统的概念结构及系统开发的基本原理和方法，全文共分为序言管理信息系统综述开发方法开发平台和工具系统规划和分析系统实现系统运行及维护系统评价程序调试与故障处理开发总结等九章本文首先阐述了Visual Basic 6.0的基本概念；然后详细说明了以数据库技术为技术背景的&人事管理管理系统&的基本功能及实现过程，最后重点介绍了软件的设计与实现详细阐述了系统分析系统设计的技术及其应用

This text regards development of the personnel management subsystem in the management information system construction of enterprises as the background,have described the concept of the management information system,basic principle and method of structure and system development, the full text is divided for the preamble altogether, the management information system survey , development approach, developing platform , tool and system plan and analyse , realize , operate and maintain , appraise systematically systematically systematically, procedure debug with trouble dealing with , developing 9 chaptering of summarizing etcthis text has explained the basic conception of visual basic 6.0 at first; then the basic function of " administrative system of the personnel " taking technology of the database as technological background of elaboration and course of realizing, introduced the design of the software and realized the network analysis of exposition , technology and application of the design systematically in detail especially finally

绪论 本文以企业管理信息系统建设中的人事管理子系统的开发为背景，论述了管理信息系统的概念结构及系统开发的基本原理和方法，全文共分为序言管理信息系统综述开发方法开发平台和工具系统规划和分析系统实现系统运行及维护系统评价程序调试与故障处理开发总结等九章本文首先阐述了visual basic 6.0的基本概念；然后详细说明了以数据库技术为技术背景的的基本功能及实现过程，最后重点介绍了软件的设计与实现详细阐述了系统分析系统设计的技术及其应用3.3。面向对象的编程。。7

This text regards development of the personnel management subsystem in the management information system construction of enterprises as the background,have described the concept of the management information system,basic principle and method of structure and system development,the full text is divided for the preamble altogether,the management information system survey ,development approach,developing platform ,tool and system plan and analyse ,realize ,operate and maintain ,appraise systematically systematically systematically,procedure debug with trouble dealing with ,developing 9 chaptering of summarizing etc.this text has explained the basic conception of visual basic 6.0 at first; then the basic function of administrative system of the personnel taking technology of the database as technological background of elaboration and course of realizing,introduced the design of the software and realized the network analysis of exposition ,technology and application of the design systematically in detail especially finally

本文以电力系统分析视频电力系统分析视频信息系统建设中的人事管理子系统的系统分析视频为电力系统分析视频，论述了管理信息系统的概念、结构及系统开发的基本原理和方法，全文共分为序言、管理信息系统综述、开发方法、开发平台和工具、系统规划和分析、系统实现、系统运行及维护、系统分析视频、程序调试与故障处理、开发总结等九章。本文首先阐述了visual basic 6.0的基本概念；然后详细说明了以数据库技术为技术背景的人事管理管理电力系统分析视频的基本功能及实现过程，最后重点介绍了软件的设计与实现详细阐述了系统分析、系统设计的技术及其应用。

Synthetically considering these characteristics, the method of freeway management and control are presented according to four aspects: system objective orientation and concept design, system demand and requirement analysis, system data management and network structure, traffic control and accident detecting theory as well as its application. Function and structure of system are delimitated from the point view of integration. Construction and function demand of subsystem are analyzed and basic implement projects are presented. In this thesis, system data flow and management method and target which based on system network topology structure and equipment demand are described. Traffic modeling ideology and the process of making dynamic model as well as accident detecting program are presented with centralized and distributed traffic control theory in detail, then freeway ramp control theory which based on predictive model and its theoretic pattern are explored. Finally, based on the object oriented programming, program of accident detecting and checking on freeway is developed by using visual C++ as tool.

论文综合考虑高速公路交通管理系统的上述特征，分别从系统目标定位及概念设计、系统需求分析、系统数据管理及网络结构分析、交通控制与交通事件检测理论与应用四个层面，对高速公路交通管理与控制问题进行了系统阐述，界定了系统的功能及各功能的实现要求，并从系统集成角度划分了系统的结构；分析了各子系统的信息、功能、建设等方面的需求，给出了基本实施方案要求；对系统数据流程进行了描述和梳理，提出了数据管理的方法、目标及措施，分析、设计了系统网络拓扑结构及设备需求；阐述了交通模型的建模思想和动态交通模型的建立过程，对集中式和分散式全局交通控制理论进行了详细的分析，提出了基于预测的高速公路匝道控制理论，并对理论模式及相关的问题进行了研究，分析了高速公路事件检测系统，并采用面向对象的编程思想，以Visual C++为编写工具，开发了高速公路事件检测系统分析软件。

The press process of blanking,drawing, perforating, flaring, trimming are adopted. In this paper, the process suitability of part is analysed. The process parameters, such as blank layout and press force are calculated. The general construction of mold and main parts are designed. The compound die of blanking,drawing,perforating and the simple press tool of flaring,trimming and detail drawings of main parts are drawn.

设计中分析了工件的冲压工艺性，对毛坯排样、冲压力、刃口尺寸等进行了计算，并且对模具相对应的凸模和凹模进行了强度校核，以及模具总体结构、主要零部件的选择与设计，绘制了落料、拉深、冲孔复合模和翻边、切边的单工序模具装配图和模具的主要零件图。

Based on the characteristics of parameterized design and key technologies of knowledge based engineering, and specially according to the characteristics of the construction, figure, assembly-parameter of bicycle frame design, the article has achieved repeated using of experiential parameter and knowledge by adopting methods such as automatic reading experiential datasheet, computing parameter by making use of program, manual data-input or modifying and so on. Based on analyzing the characteristics of Rear End design and the associated characteristics with Chain Stay and Seat Stay, different design methods are analyzed in detail, and rapidly assembling of Rear End, Chain Stay and Seat Stay is achieved by using the method of combining top-down-assembly with down-top-assembly method. Based on analyzing special technologies and UDF characteristics, the repeated using of different sectional shapes by using UDF technology on the tube section design is also achieved, and this will greatly shorten the time spent on fixing the dimensions and orientations on sketches.

在探讨了参数化设计技术特点和知识工程关键技术的基础上，针对自行车车架设计中的结构、形状、装配参数特点，分别采用了读入经验数据表、参数程序求解、手工录入或修改方法实现车架设计经验参数和知识的重复利用；在分析自行车后叉片设计特点及与平、立叉的关联特性的基础上，对不同的设计方案进行了详细分析，并采用自顶向下和自底向上相结合的方法，实现了后叉片的快速装配定位与平、立叉设计相关联；在分析了特征技术和UDF特点的基础上，将UDF用于管件截面的设计上，使各种截面形状能不断重复利用，大大节省了约束草图尺寸和位置的时间。

Design on the principle that security , economy are rational , esthetic , fix up the selection of structure and structural level of every floor, assign , turn into with PK software AutoCAD revise the part behind the structural level well; Adopt stair and floor calculating and designing a teacher to appoint by hand, and calculate the appointed floor with PKPM software, compare with the floor that calculates by hand, fetch the drawing construction drawing of the head of the two; Calculate by hand the frame which the teacher appoints loads, set up good PKPM and calculate the procedure model of the frame , calculate frame internal force and output file result with PKPM , calculate , get PKPM structure mix muscle picture turn into AutoCAD carry on part punish; Build up pieces of internal force association from frame that PKPM obtain , choose three group unfavorable association design the materials as the foundation most, carry on the design basis of the craft, and draw and obtain the basic detail drawing and match the muscle with AutoCAD.

本毕业设计以指导老师发放的《港市公安局巡警支队办公楼》建筑施工图纸为原始资料，进行结构设计和施工组织设计，设计的主要依据为现行的建筑行业规范以及指导老师的指导思想。设计以安全、经济合理、美观为原则，进行结构选型和各楼层结构平面布置，用PK 软件布置好结构平面后再转到AutoCAD上进行局部修改；采用手工计算设计老师指定的楼梯和楼板，并用PKPM 软件计算指定楼板，与手工计算的楼板进行比较，取二者之长绘制成施工图；手工计算老师指定的框架荷载，建立好PKPM计算框架程序模型，用PKPM计算框架内力并输出文件结果，把PKPM计算得到结构配筋图转到AutoCAD进行局部处理；从PKPM得出的框架构件内力组合，选择三组最不利的组合作为基础设计资料，进行手工设计基础，并用AutoCAD绘制得出基础详图及配筋。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。