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Extended multivariate public key cryptosystems with secure encryption function

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Science china(information Sciences) 2011年第6期54卷 1161-1171页

作者： WANG HouZhen 1,2 , ZHANG HuanGuo 1,2 , WANG ZhangYi 1,2 & TANG Ming 1,2 1 The key laboratory of Aerospace information Security and Trusted Computing, Ministry of Education, School of Computer, wuhan university, wuhan 430079, china 2.state key laboratory of Software engineering, wuhan university, wuhan 430072, china The key laboratory of Aerospace information Security and Trusted Computing Ministry of Education School of Computer Wuhan University Wuhan China state key laboratory of Software engineering Wuhan University Wuhan China

Advances in quantum computers pose great threats on the currently used public key cryptographic algorithms such as RSA and ECC. As a promising candidate secure against attackers equipped with quantum computational power, multivariate public key cryptosystems (MPKCs) have attracted increasing attention in recently years. Unfortunately, the existing MPKCs can only be used as a multivariate signature scheme, and it remains unknown how to construct an efficient MPKC enabling secure encryption. Furthermore, some multivariate signature schemes have been shown insecure in recent years, and it is also not trivial to build MPKC which can serve as a secure signature scheme. By employing the basic MQ-trapdoors, this paper proposes a novel MPKC and shows how it can be used as a multivariate signature scheme and a multivariate encryption scheme, respectively. The goal is achieved by incorporating our new hash authentication techniques and some modification methods such as the Shamir's minus method. Thorough analysis shows that our schemes are secure and efficient. Our MPKC gives a positive response to the challenges in multivariate public key cryptography.

关键词： cryptography post-quantum cryptography MQ problem hash function

Processing Approach of Non-linear Adjustment Models in the Space of Non-linear Models

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Geo-Spatial information Science 2003年第2期6卷 25-30页

作者： LI Chaokui ZHU Qing SONG ChengfangLI Chaokui,associate professor,Ph.D,state key laboratory of information engineering in surveying,mapping and remote sensing,wuhan university,129 Luoyu Road,wuhan 430079,china. state key laboratory of information engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan China

This paper investigates the mathematic features of non-linear models and discusses the processing way of non-linear factors which contributes to the non-linearity of a non-linear model. On the basis of the error definition,this paper puts forward a new adjustment criterion, ***,this paper investigates the solution of a non-linear regression model in the non-linear model space and makes the comparison between the estimated values in non-linear model space and those in linear model space.

关键词： non-linear adjustment model model space multi-robustness

An efficient method for detecting concurrency errors in object-oriented programs

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Science china(information Sciences) 2012年第12期55卷 2774-2784页

作者： HE YanXiang 1,2,WU Wei 2 & CHEN Yong 2 1 School of Computers,wuhan university,wuhan 430072,china 2.state key laboratory of Software engineering,wuhan university,wuhan 430072,china School of Computers Wuhan University Wuhan China state key laboratory of Software engineering Wuhan University Wuhan China

Multicore and multi-threaded processors have become the norm for modern ***,concurrent programs have become more and more prevalent despite being difficult to write and *** errors are highly likely to appear in concurrent code,conventional error detection methods such as model checking,theorem proving,and code analysis do not scale smoothly to concurrent *** is an indispensable technique for detecting concurrency errors,but it involves a great deal of manual work and is *** paper presents an automatic method for detecting concurrency errors in classes in object-oriented *** method uses a heuristic algorithm to automatically generate test cases that can effectively trigger ***,each test case is executed automatically and a fast method is adopted to identify the actual concurrency error from anomalous run *** have implemented a prototype of the method and applied it to some typical Java *** shows that our method is more effective and faster than previous work.

关键词： concurrency error dynamic test data race atomicity violations test case generation

Multiple constraints QoS multicast routing optimization algorithm in MANET based on GA

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Progress in Natural Science:Materials International 2008年第3期18卷 331-336页

作者： Baolin Sun a,c, Shangchao Pi b, Chao Gui a, Yue Zeng d, Bing Yan a, Wenxiang Wang c, Qianqing Qin c a School of Computing, Hubei university of Economics, wuhan 430205, china b College of Science, Zhongyuan university of Technology, Zhengzhou 450007, china c state key laboratory of information engineering in surveying, mapping & remote sensing, wuhan university, wuhan 430079, china d Department of Computing, Jiangxi Vocational College of Finance and Economics, Jiangxi 332000, china School of Computing Hubei University of Economics Wuhan 430205 China state key laboratory of information engineering in surveying Mapping & Remote Sensing Wuhan University Wuhan 430079 China College of Science Zhongyuan University of Technology Zhengzhou 450007 China Department of Computing Jiangxi Vocational College of Finance and Economics Jiangxi 332000 China

Usually multiple quality of service (QoS) guarantees are required in most multicast applications. This paper presents a multiple con-straints algorithm for multicast traffic engineering in mobile ad hoc networks (MANET). The proposed algorithm is a new version of multiple constraints QoS multicast routing optimization algorithm in MANET based on genetic algorithm (MQMGA). The proposed MQMGA can optimize the maximum link utilization, the cost of the multicast tree, the selection of the long-life path, the average delay and the maximum end-to-end delay. Experimental result shows that the approach is efficient, has promising performance in multicast traffic engineering and for evaluating the route stability in dynamic mobile networks.

关键词： Ad hoc network Multicast routing QoS Genetic algorithm

About the convergence rates of a class of gene expression programming

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Science china(information Sciences) 2010年第4期53卷 715-728页

作者： DU Xin1,2* & DING LiXin1 1state key laboratory of Software engineering, wuhan university, wuhan 430072, china 2Department of information engineering, Shijiazhuang university of Economics, Shijiazhuang 050031, china state key laboratory of Software engineering Wuhan University Wuhan China Department of information engineering Shijiazhuang University of Economics Shijiazhuang China

This paper studies the convergence rates of gene expression programming based on maintaining elitist (ME-GEP) by means of Markov chain and spectrum analysis. We obtain the following results: (1) ME-GEP algorithm converges to the global optimum in probability. (2) The convergence rates of ME-GEP algorithm depend on the revised spectral radius of transition matrix of Markov chain corresponding to the algorithm. (3) The upper bounds of revised spectral radius are estimated, which are determined by the parameters of ME-GEP algorithm. (4) As an application of the theoretical results acquired in the paper, the convergence rates of ME-GEP for the polynomial function modeling problem are also analyzed, which verifies the relations between the convergence rates and the algorithm parameters.

关键词： GEP ME-GEP convergence rates Markov chain revised spectral radius

Atmospheric correction of HJ-1A/B CCD images over Chinese coastal waters using MODIS-Terra aerosol data

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Science china(Technological Sciences) 2010年第S1期53卷 191-195页

作者： TIAN LiQiao 1,LU JianZhong 1,CHEN XiaoLing 1,2,3,YU ZhiFeng 1,XIAO JingJing 1,QIU Feng 1 & ZHAO Xi 1 1 state key laboratory of information engineering in surveying,mapping and remote sensing,wuhan university,wuhan 430079,china 2key laboratory of Poyang Lake Wetland and Watershed Research,Ministry of Education,Jiangxi Normal university,Nanchang 330022,china 3 The key laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang university,Nanchang 330031,china state key laboratory of information engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan China key laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education Jiangxi Normal University Nanchang China The key laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education Nanchang University Nanchang China

This paper demonstrates an atmospheric correction method to process HJ-1A/B CCD images over Chinese coastal waters with the aid of MODIS-Terra aerosol *** on the assumption of zero water-leaving radiance at the two near-infrared (NIR)bands or the shortwave infrared(SWIR)bands,the atmospheric aerosol optical depth(AOD)is firstly retrieved from MODIS-Terra with a simple extension of the NIR-SWIR combined atmospheric correction approach embedded in SeaDAS (SeaWiFS data analysis system).Then the"turbid"and"non-turbid"waters are separated by the turbid water *** probability of AOD at 551 nm band is derived based on the NIR information over"non-turbid"waters and FLAASH model is selected to do the atmospheric correction of the HJ-1A/B CCD imagery using the AOD values of highest probabilities as ***,according to the histogram of the AOD distribution at 551 nm band,the studied turbid water area is divided into several blocks and HJ-1A/B CCD imagery is corrected with the corresponding AOD values displayed with the highest frequency in each *** method has been applied to several HJ-1A/B images over Chinese coastal waters and validated by synchronous in-situ *** results have shown that this method is effective in the atmospheric correction process of HJ-1A/B CCD images for ocean color remote sensing study and application in the coastal waters.

关键词： ocean color remote sensing atmospheric correction turbid coastal waters HJ-1A/B MODIS

Hierarchical Classification of Chinese Documents Based on N grams

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wuhan university Journal of Natural Sciences 2001年第Z1期6卷 416-422页

作者： Zhou Shui geng 1, Guan Ji hong 2, He Yan xiang 2 1. state key laboratory of Software engineering, wuhan university, wuhan 430072, china 2. School of Computer Science, wuhan university, wuhan 430072, china state key laboratory of Software engineering Wuhan University Wuhan China School of Computer Science Wuhan University Wuhan China

We explore the techniques of utilizing N gram information to categorize Chinese text documents hierarchically so that the classifier can shake off the burden of large dictionaries and complex segmentation processing, and subsequently be domain and time independent. A hierarchical Chinese text classifier is implemented. Experimental results show that hierarchically classifying Chinese text documents based N grams can achieve satisfactory performance and outperforms the other traditional Chinese text classifiers.

关键词： Chinese text classification N grams feature selection hierarchical classification

Calculation of maximum ground movement and deformation caused by mining

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中国有色金属学会会刊：英文版 2011年第S3期21卷 562-569页

作者： LI Pei-xian1, 2, TAN Zhi-xiang1, 2, DENG Ka-zhong1, 2 1. key laboratory for Land Environment and Disaster Monitoring of state Bureau of surveying and mapping, china university of Mining and Technology, Xuzhou 221116, china 2. Jiangsu key laboratory of Resources and Environmental information engineering, china university of Mining and Technology, Xuzhou 221116, china key laboratory for Land Environment and Disaster Monitoring of state Bureau of surveying and mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu key laboratory of Resources and Environmental information engineering China University of Mining and Technology Xuzhou 221116 China

In order to know the maximum mining ground deformation of arbitrary surface point, directions of the maximum surface tilt, curvature,horizontal displacement and horizontal deformation caused by multi-working faces were deduced based on probability integral method. The distribution forms of surface deformations in all direction φ∈[0, 2π] were obtained and also equations of maximum deformations were given based on calculation of mining ground deformation in direction φ. A mining subsidence analysis system was developed with VB6.0. The system implements the probability integral mining subsidence prediction with direct integration method, and it can avoid errors of arbitrary shaped working face subdivision of traditional method, and accuracy of mining subsidence prediction can be improved with the direct integral method. The system implements the contour chart and profile chart and also data analysis automation by manipulation of the SURFER kernel function and it complements the defect of existing subsidence prediction software. Calculation of maximum deformations caused by multi-working faces mining in a coal mine of Xuzhou, china was shown as application example. engineering application indicates that maximum deformation of mining ground surface can be calculated and analyzed by the system. The research provides a theoretical basis and calculation tool for mining subsidence prediction and analysis.

关键词： mining subsidence probability integral method movement and deformation system development

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线路勘测设计中的三维可视化协同环境

系统仿真学报 2006年第1期18卷 128-131,161页

作者：朱庆钟正周艳吴波武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079

设计一个线路勘测设计的三维可视化协同环境,应用主席-委员模式的会议系统结构,以协同可视化设计层和协同管理层为核心的系统框架以及分布式加锁策略等实现多用户间的协同管理。同时,在三维可视化环境中,将每个线路模型的空间对象表示为... 详细信息

设计一个线路勘测设计的三维可视化协同环境,应用主席-委员模式的会议系统结构,以协同可视化设计层和协同管理层为核心的系统框架以及分布式加锁策略等实现多用户间的协同管理。同时,在三维可视化环境中,将每个线路模型的空间对象表示为Agent模型,它由具备推理能力的行为和描述对象空间特征的几何模型组成,以此实现多用户环境下线路的三维可视化协同设计与评价。

关键词：三维可视化协同环境智能体线路勘测设计