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Search Results: 1 - 10 of 23367 matches for " 魏景芝 "
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用于入侵检测的快速多模式匹配
,,景芝,钮心忻
北京邮电大学学报 , 2008, DOI: 10.13190/jbupt.200803.19.xiny
Abstract: 针对目前入侵检测匹配算法速率过慢的问题,提出了一种快速多模式匹配算法.一般情况下,该算法能充分利用匹配过程中本次匹配不成功的信息和已经匹配成功的信息,尽可能多地跳过待查文本串中的字符,不需要匹配目标文本串的每个字符,就能一次性实现对文本的快速搜索.此外,该算法由于采用组合状态自动机,还能对中文进行快速搜索.实验结果表明,本文算法具有更高的检测效率,能有效降低系统的丢包率.
用于检测过滤的多模式匹配
景芝,辛阳,杨义先,钮心忻
北京邮电大学学报 , 2007, DOI: 10.13190/jbupt.200706.69.weijzh
Abstract: 针对目前匹配速率过慢的问题,在有限自动机的多模式匹配算法的基础上,结合Boyer-Moore(BM)算法和改进的quicksearch(QS)算法的优点,提出了一个快速的多模式字符串匹配算法。一般情况下该算法能充分利用匹配过程中本次匹配不成功的信息和已经匹配成功的信息,尽可能多地跳过待查文本串中的字符,所以不需要匹配目标文本串的每个字符就能一次性实现对文本的快速搜索。实验证明,在模式串较长和较短的情况下,算法都有很好的匹配性能,能有效改善关键字检测过滤系统的性能。
缩短文章发表周期的几点做法
景芝
中国科技期刊研究 , 1992,
Abstract:
h指数在学科专业研究水平评价上的应用——以植物病理专业国内发表文献为例
景芝
图书情报工作 , 2011,
Abstract: ?由hirsch提出的h指数是评价研究人员科研产出的新指标,也可应用于高校学术水平评价。以cnki为数据源,以《中国科学引文数据库》2001-2010年间收录的关于植物病理的论文为样本,测算高校及各科研院所在植物病理专业研究水平的h指数,并运用h指数审视中国病理专业科研机构科研水平以及论文的质量和重要程度、创新性、实用性,体现其学术影响力。?
理顺关系办好科技期刊
景芝
中国科技期刊研究 , 1995,
Abstract:
缩短文章发表周期的几点做法
景芝
中国科技期刊研究 , 1992,
Abstract:
氯化四唑蓝比色法测定微量2-脱氧-D-葡萄糖
景芝,赵夏令
分析化学 , 1983,
Abstract: 氯化四唑蓝是还原糖的灵敏试剂,可在加热的碱性溶液中与还原糖反应,生成不溶性的三苯福尔马散红色沉淀。2-脱氧D-葡萄糖虽也属还原糖,但还原性显著减弱。我们试用四唑蓝比色法对2-脱氧-D-葡萄糖进行了微量测定。改进了操作步骤,提高了灵敏度,而且数据稳定,重现性好。
社会支持与农民工随迁子女生活满意度:自我认知的中介作用
江波,景芝
南京农业大学学报(社会科学版) , 2016,
Abstract: 选取积极心理学视角,以农民工随迁子女为研究对象,探究社会支持、自我认知、自我评价对其生活满意度的作用机制。研究结果表明:(1)社会支持对农民工随迁子女生活满意度具有显著的正向预测作用,自我认知和自我评价与农民工随迁子女的生活满意度呈显著相关。(2)自我认知在社会支持影响农民工随迁子女生活满意度中起中介作用,即社会支持对农民工随迁子女的生活满意度影响路径有两条,一是直接影响生活满意度,二是通过自我认知间接影响其生活满意度。但社会支持对生活满意度的直接影响是主要路径,通过结果分析从构建正式和非正式社会支持角度提出相应对策和建议。
The research, which takes urban migrant children as the research object, mainly discusses the effect of social support on life satisfaction and prediction for urban migrant children, as well as the mechanism of self-cognition between social support and life satisfaction. Research results show that:(1) Social support, self-cognition and self-evaluation are related with urban migrant children’ life satisfaction and social support plays a positive role for urban migrant children’s life satisfaction. (2) Self-cognition plays a mediate role in the situation where the social support affects city migrant children’s life satisfaction. The social support, which can directly influence life satisfaction, also can affect life satisfaction through self-cognition indirectly, however, the direct influence of social support on life satisfaction is the main way. The paper offers corresponding countermeasures and advice from the perspective of the construction of informal and informal social support
Research on the Telebiometric Authentication System Based on PKI and PMI
基于PKI和PMI的生物认证系统研究

Xin Yang,Wei Jing-zhi,Li Chao,Yang Yi-xian,
辛阳
,景芝,李超,杨义先

电子与信息学报 , 2008,
Abstract: The biometric technologies for user authentication have been applied widely to identity authentication fields. But at present, the result of research on a biometric authentication system which is used for open networks has not been found. Identity authentication based on X.509 Public Key Infrastructure(PKI) and Privileges Management Infrastructure(PMI) are used widely and effectively in open network fields for authentication and privileges management. So on the basement of PKI and PMI technology, with the function of identity authentication and privileges management, the currency biometric identity authentication system based on Biometric Certificate is introduced. Finally, by designing a highly secure biometric smart card which can realize identity authentication and privileges management, proved the ability and operation of the currency biometric identity authentication system based on PKI and PMI technology.
Overview of Study on the Technical Architecture of OMA DRM
OMA DRM技术体系研究综述

Wei Jing-zhi,Yang Yi-xian,Niu Xin-xin,
景芝
,杨义先,钮心忻

电子与信息学报 , 2008,
Abstract: In order to have a thorough understanding of the technical architecture of OMA DRM specification, and to actively promote creation of the Chinese DRM standard and application research of digital content protection technology, a systematic approach of OMA DRM is presented. The following functions of the latest release of OMA DRM2.0 are analyzed: rights object acquisition protocol, security model, architecture, content format and rights expression language. Then, these features are synthesized to present a complete working mechanism of OMA DRM: working flow and principle of OMA DRM. Finally, the capabilities of the latest release are analyzed by presenting the main difference between OMA DRM2.0 and OMA DRM1.0, and the limitations of OMA DRM2.0.
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