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Search Results: 1 - 10 of 361477 matches for " 朱万祥<br>Hai-yan KANG "
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位置服务隐私保护
Privacy preservation for location-based services

康海燕,<br>Hai-yan KANG,Wan-xiang ZHU
- , 2018, DOI: 10.6040/j.issn.1671-9352.0.2018.128
Abstract: 隐私的泄露问题不仅包含用户提交的位置和查询数据,更是包含了其中隐藏的用户身份、兴趣爱好、社会习惯、行为模式等。对位置服务隐私保护的技术进行综述,介绍了位置服务的应用场景、位置隐私的攻击方法。对现有的隐私保护体系结构和保护技术进行整理归纳。对未来的研究进行了展望,并提出一种基于缓存的时空扰动方法和LBS隐私保护度量假设方案。
The disclosure of privacy involves not only the users' locations and queries data, but also the users' identities, interests, social habits, behavior patterns and privacy hidden in these data. A review of privacy preserving for location-based services (LBS) is provided. The application scenarios of location services is introduced, the method of location privacy attack is given. The existing research on the privacy protection system structure and protection technology is summarized. Finally, future research is prospected, and a cache-based spatiotemporal disturbance method and LBS privacy protection metric hypothesis scheme are proposed.
差分隐私保护在数据挖掘中应用综述
Survey on application of data mining via differential privacy

康海燕,马跃雷<br>KANG Hai-yan, MA Yue-lei
- , 2017, DOI: 10.6040/j.issn.1671-9352.2.2016.053
Abstract: 摘要: 针对差分隐私在数据挖掘中的最新成果进行了研究,介绍了差分隐私保护的定义和实现机制,分析了差分隐私在模式挖掘、分类和聚类中的相关研究,着重解析了部分重要技术的实现原理,对比分析了其优缺点和算法复杂度。最后,展望了差分隐私在动态数据发布和大数据环境下的研究方向。
Abstract: The latest results of differential privacy in data mining were surveyed. The basic concepts of differential privacy were introduced. It analyzes the differential privacys research in pattern mining, classification and cluster. It was focused that on the analysis of the principle of some important technology to achieve. And also it was made that comparative analysis of its strengths and weaknesses and algorithm complexity. Finally, the future research of difference privacy under the dynamic data publication and big data environments was discussed
A study on the vegetation parameterization scheme
一个新的植被参数化方案研究

Chen Wan-long,Shao Hai-yan,<br>陈,邵海燕
中国生态农业学报 , 2000,
Abstract: 为定量描述土壤-植被-大气连续体的热量及水分交换,建立了以有效比湿等为基础且具普适性的植被参数化方案——1种等温大叶模式。利用拉萨、狮泉河和南京3个试验站的气象观测资料验证并由此计算的感热通量和潜热通量以及净辐射量、土壤温度等观测结果进行对比分析表明,该植被参数化方案成功地反映了下垫面的水、热传输特征。
Knowledge-Intensive Business Service within Cluster Innovation Systems: A Bridge for Innovation
集群创新系统的创新桥梁:知识密集型服务业

WEI Jiang,ZHU Hai-yan,<br>魏江,海燕
浙江大学学报(人文社会科学版) , 2007,
Abstract: 产业集群作为区域经济的助推器,其内部的制造业企业、一般服务业、大学科研机构、政府以及知识密集型服务业五大主体之间的交互学习与创新显得尤为重要。而知识密集型服务业作为创新系统内的知识中介,扮演着四种不同的创新桥梁角色:(1)传统桥梁;(2)“蜜蜂式”桥梁;(3)“红娘式”桥梁;(4)“网关式”桥梁。从KIBS知识生产和知识转移的角度,深入分析创新桥梁的要素构成及知识生产和转移情况,可以得出创新桥梁的作用机理为知识获取、知识整合和新知识转移三大环节。
YHFT-QDSP: High-Performance Heterogeneous Multi-Core DSP
Shu-Ming Chen,Jiang-Hua Wan,Jian-Zhuang Lu,Zhong Liu,Hai-Yan Sun,Yong-Jie Sun,Heng-Zhu Liu,Xiang-Yuan Liu,Zhen-Tao Li,Yi Xu,Xiao-Wen Chen,<br>陈书明,江华,鲁建壮,刘仲,孙海燕,孙永节,刘衡竹,,李振涛,徐毅,陈小文
计算机科学技术学报 , 2010,
Abstract: Multi-core architectures are widely used to enhance the microprocessor performance within a limited increase in time-to-market and power consumption of the chips.Toward the application of high-density data signal processing, this paper presents a novel heterogeneous multi-core architecture digital signal processor(DSP),YHFT-QDSP,with one RISC CPU core and 4 VLIW DSP cores.By three kinds of interconnection,YHFT-QDSP provides high efficiency message communication for inner-chip RISC core and DSP cores,inner-c...
Construction of a Plant Transgenic Expression Vector of Peanut
一种花生转基因表达载体的构建

WANG Jing,YAN Hai-Yan,KANG Qiang-Sheng,<br>王静,严海燕,康强胜
植物科学学报 , 2005,
Abstract: 通过用一对特异性引物,PCR扩增得到花生(Arachis hypogaea)主要致敏蛋白Arah1的基因的启动子片段1957bp,其序列组成与已发表序列基本一致。用其替换pBIN 35S-mGFP4载体中的35S启动子部分,组成一种花生转基因表达载体pGA1。该载体含有种子特异表达调控元件、增强表达元件和一些与转录因子结合的调控元件,是一个强启动子,便于将外源基因转入花生,实现外源基因在花生中的表达,为建立花生生物反应器奠定了基础。
SIP Authentication Mechanism and Its Performace Analysis
SIP协议的认证机制及其性能分析

JIN Kang-shuang,WANG Ze-bing,FENG Yan,CHEN Hai-yan,<br>金康双,王泽兵,冯雁,陈海燕
计算机应用研究 , 2004,
Abstract: Session Initiation Protocol(SIP) is the Internet Engineering Task Force (IETF) standard for IP telephony,and it has a promising applied prospect.In this work,the security authentication mechanism used by SIP is described.Moreover an experimental performance analysis of the SIP security mechanisms is provided,which based on the open source Java implementation of a SIP proxy server.
基于视频分析的地理信息隐私保护方法
Enhancing privacy for geographic information based on video analysis

康海燕,黄渝轩,陈楚翘<br>KANG Hai-yan, HUANG Yu-xuan, CHEN Chu-qiao
- , 2018, DOI: 10.6040/j.issn.1671-9352.2.2017.077
Abstract: 摘要: 社交网络中的视频资源常常包含了丰富的地理信息,因而给用户隐私安全带来严重的威胁。针对视频中的位置隐私等问题,利用太阳影子定位技术以及图像局部扭曲技术原理,提出了基于图像处理的视频地理信息隐私保护方法。根据观测直杆影子的视频建立太阳影子变化模型,挖掘该视频的地理信息,对视频进行处理,确定自然投影阴影区域。使用自适应网格技术对视频局部区域扭曲,达到了地理信息隐私保护的目的。实验表明,该方法能够对地理信息中包含的个人信息进行伪装和隐藏,同时保证视频连续完整性和可用性。
Abstract: Video resources in social networks contain abundant geography information, which always cause severe security challenge to individual privacy. A method of enhancing privacy for geographic information based on video analysis(EP-VGI)is proposed with the analytical principle of sun shadow positioning and local image artifacts. To extract geographic information, we set up a model of sun shadow by observe the changing shadow in the video. We selected the natural projection shadow area by processing the video image sequence. By using the methods of adaptive mesh, we achieved our purpose to protect the geographic information and privacy protection. Experiments show the method can be successful to mislead the hacker by hiding geographic information, and ensure the videos availability at the same time by actual testing
One Management Strategy of Reconfigurable Resource Using Graph Theory
一种应用图论方法管理可重构资源的策略

ZHANG Hong-lie,ZHANG Guo-yin,CONG Wan-suo,HU Hai-yan,<br>张宏烈,张国印,,胡海燕
计算机科学 , 2010,
Abstract: The management of reconfigurable resource is an important task for operating system of reconfigurable system. This paper presented UPFS algorithm for FPGA based on graph theory. The main idea of UPFS is the free space of FPGA mapped to undigraph, and then calculated the biggest loop and chain using adjacency matrix and direction vector inclination in undigraph concept, at last we found a set of the biggest rectangular satisfied the conditions. The simulation results show that, compared with existent algorithms, UPFS is feasible management strategy, which can reduce the waste of system resource and decrease the time of hardware distribution.
Periodic oscillation of rare-gas atoms in carbon nanotubes
稀有气体原子在纳米碳管中的周期性振荡

Jin Nian-Qing,Zhang Hai-Yan,Li Shi-Ying,Zeng Xiang-Hua,<br>金年庆,张海燕,李世影,
物理学报 , 2007,
Abstract: Based on the classical molecular dynamics method by using TLHT potential, the dynamical process of rare-gas atoms injected into single-walled carbon nanotube (SWCNT) is discussed. Firstly, the minimal diameters of SWCNT absorbing rare-gas atoms He, Ne, Ar, Kr, Xe are obtained as 6.3 ?,7.0 ?, 8.6 ?,8.6 ? and 8.6 ?, respectively. Then, the threshold energies to encapsulate the rare-gas atoms in SWCNT of different diameters are calculated. The interesting result is that the encapsulated rare-gas atoms are constantly oscillating in SWCNT, and the oscillation period bears no relation to the injection energy, while the amplitude depends on the injection energy, that is, the amplitude increases with increasing injection energy. The investigation indicates that for a suitable SWCNT, rare-gas atoms with a relative small kinetic energy will oscillate steadily in SWCNT, and the oscillation frequency can reach GHz order.
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