安全

This topic is focus on building a safe, reliable, and fairly active defense capabilities campus network security model, by the security assessment, vulnerability scanning and other technical means, to reinforce the existing shortcomings and vulnerabilities of information systems, and to establish a strong defensing ability information system platform; useing related network security precautions technologies, to establish campus network security and prevention system, to fundamentally eliminate security threats from internal and external network.

本课题致力于构建一个安全、可靠、具有一定主动防御能力的校园网安全模型，通过安全评估、漏洞扫描等技术手段，对现有信息系统的缺陷、漏洞进行加固，建立具有较强防范能力的信息系统平台；利用网络安全防范的相关技术，建立校园网安全防范体系，从根本上解决来自网络内外部对网络安全造成的各种威胁。

With some insecure factors existing Short Message Service system which is on the basis of wireless network, such as the short message will be filched, intercepted and lost.

针对当前基于无线网络的短消息系统的一系列不安全的因素(如数据包被窃取、截获及丢失)，提出基于GSM Modem设备的安全短消息系统，引入安全短消息协议，利用证书以及安全认证因子两种方式对手机终端和安全短信网关进行安全认证，调用加解密算法对短消息数据包进行加密传输。

The second part: It was the main text point, elaborated the formation process of petroleum safety policy in Middle East of the United States, insured the American national security, chastened Soviets petroleum to extend, and guarantied the western allies petroleum to supply safety, which was the United States the outward policy's important and strategic target to the safety policy of petroleum of Middle East particularly. At the foundation that the second part discussed on, the third part talked about the United States building the natural cover that was set up to keep Soviets petroleum influence from going down south, controlled Middle East petroleum resources, maintained the petroleum charter power, insured the western petroleum to supply and transport safety, kept Soviets petroleum from entering Western Europe, chastened "" newcomer"" and carried on the total analysis to the American petroleum of Middle East safety policy's contents and substances from four aspects. The fourth part: carried on the valuation to the safe policy of American petroleum of Middle East fromfour aspects, analyzed its gain and loss.

确保美国国家安全，遏制苏联石油扩张，保障西方盟国石油供给安全，是美国对外政策尤其是对中东石油安全政策的重大战略目标；在第二部分论述的基础之上，第三部分从美国构建阻止苏联石油势力南下的屏障，控制中东石油资源、维持石油特许权，确保西方石油供给、运输安全，阻止苏联石油进入西欧、遏制&新来者&四个方面对美国中东石油安全政策内容及实质进行总体分析；第四部分，从四个方面对美国中东石油安全政策进行评估，分析其得失。

It is influenced by resources,the level of economic development,management,policy and other factors.The paper sets up indexs of assessing,and analyses the status of cultivated land resources quantity security on time and space.The result indicts that since the reform and open,the level of security ascended firstly then descended.From the point of view of regional distribution,the security standard o...

本文在分析耕地资源数量安全影响因素的基础上，构建其评价指标体系，并对我国耕地资源数量安全的时空差异规律进行了分析，结果表明，自改革开放以来，我国耕地资源数量安全状况呈先增后减的变化趋势；从安全水平的区域分布来看，北部和西部省份的安全水平普遍高于东部和南部省份，同时发现，区域安全水平与经济发展水平呈负相关关系。

Surveying and mapping equipment for the safe use and maintenance, mapping data management and strict registration, electricity water security checks, driver safety education and vehicle safety management, fire training and fire fighting equipment, the knowledge of the actual operation, smoking places and out of entry - card security management, bearer visiting inquiry and inspection, operation of regional sanitation and rodent control pest and disease prevention work systems and the implementation of the check out the problems and hidden dangers, a deadline for rectification, and as an important basis for performance evaluation of cadres , which effectively ensure the safety of personnel and equipment.

加强测绘仪器设备的安全使用和保养、测绘资料管理和严格登记、用电用水的安全检查、驾驶员安全教育和车辆安全管理、消防知识的培训和消防器材的实际操作、吸烟场所和出入门卡的安全管理、来人来访的询问和检查、作业区域环境卫生和防鼠防虫防病工作等制度的建设和执行，对检查出的问题和隐患，限期整改，并作为考核干部实绩的重要依据，从而有效地保证了人员和设备的安全。

A safety level-based evacuation scheme of subway station is presented in this paper, with performance-based evacuation design combined. According to the evacuation characteristics of subway station, accidental evacuation time and available safety evacuation time under smoke control have been classified into three safety levels respectively. Then four safety levels have been proposed based on them. A flow chart of safety evacuation scheme of subway station under fire was then proposed based on the guidelines of safety evacuation and code for design of metro.

针对地铁车站人员疏散特点，以人员安全疏散准则和现行地铁设计规范为基础，融合了火灾安全工程学的性能化人员疏散设计思路，分别将事故疏散时间和烟控可用安全疏散时间划分为三个等级，综合形成了四类人员疏散安全等级标准，并在此基础上提出了框架性的基于安全等级的地铁车站火灾人员安全疏散方案设计流程。

This thesis will pass the detailed analysis, taking safe mode of electronic commerce as the main line, connecting get up, draw lessons from domestic and international to the electronic commerces advanced technique and experiences of safe mode research, introduce the electronic commerce of the Donguan present condition of the safe mode with the present condition of the our country electronic commerce and the present condition of the abroads existent problem, then usher in to resolve the related and safe technique of safe mode problem of electronic commerce, negotiate, mode and strategy, take this as the core, discuss the electronic commerce safe mode problem of the Dongugan to resolve the measure and paths.

本论文将通过详细的分析，以电子商务安全模式为主线，将我国电子商务的现状和国外的现状连接起来，借鉴国内外对电子商务安全模式研究的先进技术和经验，介绍东莞市电子商务安全模式的现状及存在的问题，再引进解决电子商务安全模式问题的相关安全技术、协议、模式和策略，以此为核心，论述东莞市电子商务安全模式问题的解决措施和途径。

Access-reception System takes charge providing multifarious means to accept and treat the access from E-business customer, while Management System administers the information in the platform in all-round on the basis of Certification Authorize System. Payment System achieve the task that customer pay their money in bank to the dealer. Safeguard System is the basis of other three systems, and it concerns with the safety of while transaction system. Safeguarding System includes many fields, such as safety of system management, safety of operating system, safety of network communication etc.

其中接入体系主要负责为用户提供各种不同的接入手段，例如电话、计算机等，并提供相关接入层的计费管理等功能；平台的管理体系建立在身份安全认证体系基础之上，为具体业务应用提供综合性的管理，其中主要包含信息交换的管理和运营数据的管理两个方面；支付体系实现各种电子商务业务的支付和结算工作；安全体系则是电子商务服务平台其它三个体系的基础，它的完善与否直接关系到整个系统交易的安全，它本身覆盖了系统管理安全、操作系统安全、网络通讯安全等多个方面。

Based on probability theory, a method for describing and calculating the collision probability between rendezvous and docking vehicle and debris is presented, and the method involves quantitatively analyzing the collision probability using quasi maximum instantaneous collision probability and total collision probability. The method calculating the indexes is developed, and the input required to perform a calculation includes the respective state vectors, position error covariance matrices and physical sizes of objects involved.(3) Two methods to analyze relative trajectory safety between chaser and target are developed, which are 3-sigma ellipsoid based methodology and collision probability based methodology.

1分析了交会对接各阶段面临的主要轨迹安全威胁，阐述了被动和主动安全策略、目标器的交会对接控制区域等保证交会安全的措施；(2)基于概率思想发展了线性和非线性运动情况下飞行器与空间碎片的碰撞判断方法，提出采用总碰撞概率和拟最大瞬时碰撞概率来综合描述飞行器与空间碎片的碰撞危险程度，推导了通过飞行器和空间碎片各自的状态矢量、位置误差协方差矩阵以及形状尺寸来计算碰撞概率的公式；(3)提出了两种分析追踪器和目标器之间相对轨迹安全的新方法：基于3σ椭球的轨迹安全分析方法和基于碰撞概率的轨迹安全分析方法。

A two-level-caches mechanism is brought in the Generalized Framework for Access Control based on a three levels model of access, and is implemented in Red-Flag Secure OS .

本文以一个商品化安全操作系统的大量实际开发工作为基础，结合国内外在多安全政策支持框架、安全模型和安全操作系统等方面的最新研究成果，对多安全政策支持框架的理论及其在安全操作系统中的实施进行了研究。

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。