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A prototype auto-human support system for spatial analysis

Progress in Natural Science:Materials International 2006年第9期16卷 954-966页

作者： LI Lianfa and WANG Jinfeng (State key laboratory of Resources & Environmental {2. System, {3. of Geographical sciences & Natural Resources Research, chinese academy of sciences, beijing 100101, china) [a]State key laboratory of Resources & Environmental {2. System Institute of Geographical Sciences & Natural Resources Research Chinese Academy Sciences Beijing China

Spatial analysis is a multidisciplinary field that involves multiple influential factors, variation and uncertainty, and modeling of geospatial data is a complex procedure affected by spatial context, mechanism and assumptions. In order to make spatial modeling easier, some scholars have suggested a lot of knowledge from exploratory data analysis (EDA), specification of the model, fitness and diagnosis of the model, to interpretation of the model. Also an amount of software has improved some functionalities of spatial analysis, e. g. EDA by the dynamic link (GeoDa) and robust statistical calculation (R). However, there are few programs for spatial analysis that can automatically deal with unstructured declarative issues and uncertainty in machine modeling using the domain knowledge. Under this context, this paper suggests a prototype support system for spatial analysis that can automatically use experience and knowledge from the experts to deal with complexity and uncertainty in modeling. The knowledge base component, as the major contribution of the system, in support of the expert system shell, codes and stores declarative modeling knowledge, e.g. spatial context, mechanisms and prior knowledge to deal with declarative issues during the modeling procedure. With the open architecture, the system integrates functionalities of other components, e.g. GIS’ visualization, DBMS, and robust calculation in an interactive environment. An application case of spatial sampling, design and implementation of spatial modeling with such a system is demonstrated.

关键词： spatial analysis automatic support system modeling of spatial data artificial inference for modeling.

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Polar differential power attacks and evaluation

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Science china(information {2.) 2012年第7期55卷 1588-1604页

作者： TANG Ming 1 ,QIU ZhenLong 1 ,GAO Si 1,2.,YI Mu 3.,LIU ShuBo 1 ,ZHANG HuanGuo 1 & JIN YingZhen 1 1 School of Computer Science,Wuhan University,Wuhan 43.072.china 2.State key {2. of information security,institute of software,chinese academy of sciences,{13. 100190,china 3.Centre for Computer and information security Research School of Computer Science and software Engineering University of Wollongong,Wollongong,NSW 2.2.,Australia 1. School of Computer Science Wuhan University Wuhan 430072 China2. State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China3. Centre for Computer and Information Security Research School of Computer Science and Software Engineering University of Wollongong Wollongong NSW 2522 Australia

Side channel attacks (SCAs) on security software and hardware have become major concerns on computer and system *** existing SCAs generally require the knowledge of the corresponding cryptographic algorithm and implementation adopted in the target; therefore,they are not fully suitable for practical *** this paper,we propose a novel SCA-polar differential power attack (polar DPA).We found that DPA peaks have different biases for different cryptographic algorithms and *** on these biases,we can successfully attack a block cipher,assuming that the cipher algorithm uses a secret {2. in its first round,without the knowledge of the cipher algorithm or *** rounds can be treated as a black *** present a detailed theoretical analysis and experiment to demonstrate the correctness and efficiency of our ***,our scheme has demonstrated an improvement over the leakage evaluation scheme due to Ichikawa et al.(CHES 2.05).Our evaluation method can be used in electronic design automatic (EDA) flows and can help security circuit designers to understand the data leakage due to SCAs.

关键词： computer security differential power attack side channel attack

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A particle-based method for granular flow simulation

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Science china(information {2.) 2012年第5期55卷 1062-1072页

作者： CHANG YuanZhang 1,BAO Kai 2.3.ZHU Jian 1 & WU EnHua 1,2.1 Department of Computer and information Science,University of Macau,Macao,{3. 2.State {2. laboratory of Computer Science,institute of software,chinese academy of sciences,beijing 100190,{3. 3.Division of Mathematical and Computer sciences & Engineering,KAUST,Thuwal,Saudi Arabia 1. Department of Computer and information Science University of Macau Macao China2. State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100190 China3. Division of Mathematical and Computer Sciences & Engineering KAUST Thuwal Saudi Arabia

We present a new particle-based method for granular flow *** the method,a new elastic stress term,which is derived from a modified form of the Hooke's law,is included in the momentum governing equation to handle the friction of granular *** force is also added to simulate the dynamic friction for the purpose of smoothing the velocity field and further maintaining the simulation *** from the Lagrangian nature of the SPH method,large flow deformation can be well handled easily and *** addition,a signed distance field is also employed to enforce the solid boundary *** experimental results show that the proposed method is effective and efficient for handling the flow of granular materials,and different kinds of granular behaviors can be well simulated by adjusting just one parameter.

关键词： granular materials sand smoothed particle hydrodynamics SPH Hooke’s law animation simu-lation

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Nondegenerative ML-sequences over ring Z/（2.）

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Science Bulletin 1999年第17期 1557-1561页

作者： YANG Junhui and ZHAI Qibin institute of software , {2. {3. of sciences , beijing 100080, china State key laboratory of information security , beijing 100080, china

The so-called quasi-period of an ML-sequence has been introduced. It is noted that an ML-sequence may degenerate in the sense that it has the quasi-period shorter than its period, and the problem of constructing the n... 详细信息

关键词： nondegenerate ML-sequence quasi-period.

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Scan chain design for shift power reduction in scan-based testing

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Science china(information {2.) 2011年第4期54卷 767-777页

作者： LI Jia 1,HU Yu 2.& LI XiaoWei 2.1 The School of software,Tsinghua University,{3. 100084,{2. 2.The institute of Computing Technology,chinese academy of sciences,{3. 100190,{2. 1. The School of software Tsinghua University Beijing 100084 China2. The Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

Test power of VLSI systems has become a challenging issue *** scan shift power dominates the average test power and restricts clock frequency of the shift phase,leading to excessive thermal accumulation and long test *** paper proposes a scan chain design technique to solve the above *** on weighted transition metric (WTM),the proposed extended WTM (EWTM) that is utilized to guide the scan chain design algorithm can estimate the scan shift power in both the shift-in and shift-out ***,the wire length overhead of the proposed scan chain design can also be reduced by the proposed distance of EWTM (DEWTM) *** results confirm that the proposed approach can significantly reduce scan shift power with low wire length overhead.

关键词： low power DfT scan-based testing test power reduction scan chain design

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QKD扩展BB84协议的Breidbart基窃听问题

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物理学报 2002年第5期51卷 961-965页

作者：杨理吴令安刘颂豪中国科学院研究生院信息安全国家重点实验室北京100039 中国科学院物理研究所北京100080 华南师范大学量子电子学研究所广州510631

给出了六态扩展BB84协议的Breidbart基窃听方案 ,分析并计算了各种截取重发策略下的Alice Eve平均交互信息量和施行QKD标准纠错手续后的有效平均交互信息量 ,结果显示Breidbart基窃听 Breidbart基重发策略 (B B策略 )最为有效 .考虑到... 详细信息

给出了六态扩展BB84协议的Breidbart基窃听方案 ,分析并计算了各种截取重发策略下的Alice Eve平均交互信息量和施行QKD标准纠错手续后的有效平均交互信息量 ,结果显示Breidbart基窃听 Breidbart基重发策略 (B B策略 )最为有效 .考虑到Alice和Bob可以在公开讨论阶段利用废弃数据检验是否存在B B窃听以降低秘密性增强算法的强度 ,减少量子密钥的损失 ,提出了修改BB84协议的建议 .

关键词：量子密码 BB84协议 Breidbart基窃听量子密钥分配 QKD

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Studies and advances on joint source-channel encoding/decoding techniques in flow media communications

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Science china(information {2.) 2010年第1期53卷 1-17页

作者： TU GuoFang1, LIU JianJun1, ZHANG Can1,2. GAO ShaoShuai3.& LI ShiDong4 1School of information Science and Engineering, Graduate University of chinese {2. of sciences, beijing 100049, china 2.tate key laboratory of information security, Graduate University of chinese {2. of sciences, beijing 100049, china 3.ational institute of Standards and Technology, Gaithersburg, MD 2.899, USA, 4Department of Mathematics, San Francisco State University, San Francisco, CA 9413.0} USA 1. School of information Science and Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China2. State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100049 China3. National Institute of Standards and Technology Gaithersburg MD 20899 USA4. Department of Mathematics San Francisco State University San Francisco CA 94132 USA

Joint source-channel coding/decoding (JSCC/JSCD) techniques in flow media communications have become a state-of-the-art and one of the challenging research subjects in the spatial communication area. They have great application prospective and deep impact in various manned space flights, satellite missions, mobile radio communications and deep-space explorations. In the last few years, there have been influential achievements in JSCC/JSCD studies. This paper aims at an introduction to the basic principles of joint source-channel optimal design. A general summarization and classification for various existing JSCC/JSCD methods is addressed. Also presented is a JSCD scheme based on variable-length coding, capable of providing reliable resolutions for flow media data transmission in spatial communications.

关键词： joint source-channel coding/decoding rate allocation variable-length coding/decoding iterative decoding

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A generalized mean shift tracking algorithm

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Science china(information {2.) 2011年第11期54卷 2373-2385页

作者： CHEN JianJun 1,4,ZHANG SuoFei 1,AN GuoCheng 2.& WU ZhenYang 1,3. School of information Science and Engineering,Southeast University,Nanjing 2.0096,{3. 2.Intelligence Engineering Lab,{2. of software chinese academy of sciences,beijing 100190,{3. 3.key {13. of Underwater Acoustic Signal Processing of Ministry of Education,Southeast University,Nanjing 2.0096,{3. 4 Nanjing Research {2. of Electronic Technology,Nanjing 2.0013.{3. 1. School of information Science and Engineering Southeast University Nanjing 210096 China4. Nanjing Research Institute of Electronic Technology Nanjing 210013 China2. Intelligence Engineering Lab Institute of Software Chinese Academy of Sciences Beijing 100190 China3. Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education Southeast University Nanjing 210096 China

CAMSHIFT algorithm and Comaniciu/Meer algorithm are two fundamental frameworks of mean shift procedure for video target *** paper generalizes the two well-known mean shift tracking algorithms,originally due to Bradski and Comaniciu/Meer.A new general similarity function which defines the distance between the target model and target candidate is employed to calculate the pixel weights and the target *** target size is iteratively estimated and updated based on the zeroth order moment of the pixel *** we prove that both the CAMSHIFT algorithm and the Comaniciu/Meer algorithm can be included in the generalized mean shift tracking *** tracking performances of three mean shift algorithms in the unified framework are shown and compared in the experimental results.

关键词： mean shift CAMSHIFT video target tracking similarity measure

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Robust Threshold Guillou-Quisquater Signature Scheme

Robust Threshold Guillou-Quisquater Signature Scheme

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The 1st chinese Conference on Trusted Computing and information {2.

作者： WANG Hong. ZHANG Zhen-feng, FENG Deng-guo State key laboratory of {2. {3. (Graduate School of chinese academy of sciences), beijing 10003., china State key laboratory of {2. {3. ({13. of software of chinese academy of sciences), beijing 100080, china

＜正＞ The deficiencies of the first threshold Guillou-Quisquater signature scheme presented by Li-San Liu, Cheng-Kang Chu and Wen-Guey Tzeng are analysised at first, and then a new threshold Guillou-Quisquater signature scheme is presented. The new scheme is unforgeable and robust against any adaptive adversary if the base Guillou-Quisquater signature scheme is unforgeable under the chosen message attack and computing the discrete logarithm modulo a prime is hard. This scheme can also achieve optimal resilience. However, the new scheme does not need the assumption that N is the product of two safe primes. The basie signature scheme underlyingthe new scheme is exactly Guillou-Quisquater signature scheme, and the additional strong computation assumption introduced by the first threshold Guillou-Quisquater scheme is weaken.

关键词： veriable secret sharing threshold cryptography digital signature scheme robust secure multiparty computation

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PROOF OF CHABAUD AND VAUDENAY'S ALMOST BENT FUNCTIONS CONJECTURE

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Journal of Electronics(china) 1999年第4期16卷 380-381页

作者： Feng Dengguo Wang Haibin(State key laboratory of {2. {3., Graduate School of USTC, beijing 10003.) (institute of software of chinese Academes of sciences, beijing 100080)

This paper proves that the conjecture of Chabaud and Vandenay(Proc. Euro-crypt’94) is right.

关键词： Cryptography Almost Bent functions

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