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Lion pride optimizer:An optimization algorithm inspired by lion pride behavior

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Science china(information Sciences) 2012年第10期55卷 2369-2389页

作者： WANG Bo,JIN XiaoPing & CHENG Bo state key laboratory of Automotive Safety and Energy,Tsinghua University,beijing 100084,china 1. state key laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China

In this paper,we report a novel optimization algorithm,lion pride optimizer(LPO),which is inspired by lion pride *** framework is mainly based on lion prides’ evolution process and group living *** a lion pride,brutal competition of individuals happens among male lions both within and among prides;on the other hand,each member plays an important role in the persistence of a lion *** on this framework,concepts from lion prides behavior,e.g.,the strongest males occupy nearly all mating resources,and if a new cohort of males is able to take over a pride,they will seek to kill young cubs sired by their predecessors,are employed metaphorically to design optimum searching strategies for solving continuous optimization *** the studies of the algorithm property,it is found that the LPO algorithm is not sensitive to most parameters,which shows the robustness of the algorithm and the parameters are not *** tendency of the algorithm is not *** is found that the pride update strategy and brutal competition of individuals are two main factors that contribute to the performance of *** to the test results on 23 famous benchmark functions,the LPO algorithm has better performance than the other seven state-of-the-art algorithms on both unimodal and multimodal benchmark functions;in the test of high-dimensional multimodal problems,LPO outperforms the other five algorithms on all benchmark functions.

关键词： animal behavior evolutionary algorithm lion pride optimization swarm intelligence

Weight hierarchies of linear codes satisfying the Near-Chain condition

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Progress in Natural Science:Materials International 2005年第9期15卷 784-792页

作者： LIU Zihui1** and CHEN Wende2(1. School of Mathematical Sciences, Peking University, beijing 100871, china 2. laboratory of Systems and Control and key state laboratory of information security, Institute of Systems Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, beijing 100080, china) School of Mathematical Sciences Peking University Beijing 100871 China. laboratory of Systems and Control and key state laboratory of information security Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China

The weight hierarchies of a linear [n,k;q] code C satisfying the Near-Chain condition are studied, almost all the weight hierarchies of such code are determined.

关键词： weight hierarchy Near-Chain condition difference sequence linear code.

Logical verification of scientific discovery

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Science china(information Sciences) 2010年第4期53卷 677-684页

作者： LI Wei state key laboratory of Software Development Environment, School of Computer Science and Engineering, Beihang University, beijing 100191, china 1. state key laboratory of Software Development Environment School of Computer Science and Engineering Beihang University Beijing 100191 China

This paper shows that the discovery processes of Einstein’s special theory of relativity and Darwin’s theory of evolution of species can be formally verified by R-calculus which is a logical inference system. The aim of R-calculus is to delete the principles of scientific theories which contradict empirical evidence. The paper shows that the special theory of relativity is the only and correct choice for physics to meet the experimental evidence given at the time. As far as the biology of Darwin’s time is concerned, however, the R-calculus has derived three logically correct but different theories, which are all consistent with the empirical evidence provided by Darwin and his principle of natural selection. Darwin’s theory of evolution matches one of the three theories derived by R-calculus. This theory has a logical consequence that is "each species has been independently created is erroneous". But the other two theories support the negation of the above statement. The existence of the other two theories may be a reason of the controversies over Darwin’s theory.

关键词： R-calculus theory of relativity theory of evolution

Seasonal patterns of spatial differentiation of landcover change in china

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Chinese Science Bulletin 1999年第4期44卷 362-364页

作者： CHEN Yufengstate key laboratory of Resource and Environment information System , Institute of Geography, Chinese Academy of Sciences, beijing 100101, china state key laboratory of Resource and Environment information System Institute of Geography Chinese Academy of Sciences Beijing China

Using the 1°×1° NOAA AVHRR NDVI data set in china, an index on the spatial different gradient of landcover is created. Then based on the index and supported by the geographical information system, it is revealed through principal component and factor analyses methods that there exist four types of seasonal patterns of spatial differentiation of landcover change in china, i.e. November to next March type, June to September type, May or October type and April type.

关键词： landcover spatial differentiation seasonal pattern.

On the number of rotation symmetric Boolean functions

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Science china(information Sciences) 2010年第3期53卷 537-545页

作者： FU ShaoJing1, LI Chao1,2 & QU LongJiang1,3 1Science College of National University of Defense Technology, Changsha 410073, china 2state key laboratory of information security, beijing 100039, china 3National Mobile Communications Research laboratory, Southeast University, Nanjing 210096, china 1. Science College of National University of Defense Technology Changsha 410073 China2. State Key Laboratory of Information Security Beijing 100039 China3. National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China

Rotation symmetric Boolean functions (RSBFs) have been used as components of different cryptosystems. This class of functions are invariant under circular translation of indices. In this paper, we investigated balanced RSBFs and 1st order correlation immune RSBFs. Based on constructive techniques, we give an accurate enumeration formula for n-variable balanced RSBFs when n is a power of a prime. Furthermore, an original and efficient method to enumerate all n-variable (n prime) 1st order correlationimmune functions is presented. The exact number of 1st order correlation immune RSBFs with 11 variables is 6925047156550478825225250374129764511077684773805520800 and the number of 13 variables has 189 digits. Then for more variables, we also provide a significant lower bound on the number of 1st order correlation immune RSBFs.

关键词： cryptography rotation symmetry correlation immunity balancedness

Design theory and method of multivariate hash function

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Science china(information Sciences) 2010年第10期53卷 1977-1987页

作者： WANG HouZhen 1,2 , ZHANG HuanGuo 1 , WU QianHong 1 , ZHANG Yu 1 , LI ChunLei 1 & ZHANG XinYu 1 1 The key laboratory of Aerospace information security and Trusted Computing, Ministry of Education, School of Computer, Wuhan University, Wuhan 430072, china 2 key laboratory of Mathematics Mechanization, beijing 100080, china 1. The key laboratory of Aerospace information security and Trusted Computing Ministry of Education School of Computer Wuhan University Wuhan 430072 China2. Key Laboratory of Mathematics Mechanization Beijing 100080 China

This paper proposes a novel hash algorithm whose security is based on the multivariate nonlinear polynomial equations of NP-hard problem over a finite field and combines with HAIFA iterative framework. Over the current widely used hash algorithms, the new algorithm has the following advantages: its security is based on a recognized difficult mathematical problem; the hash length can be changed freely; its design can be automated such that users may construct specific hash function meeting the actual needs. Furthermore, we discuss the security, efficiency and performance of the new algorithm. Under some related difficult mathematical assumptions and theoretical analysis, the new algorithm is proven practical by the experiment results, and capable of achieving security of an ideal hash function by choosing suitable parameters. In addition, it can also be used as a pseudo-random number generator for the good randomness of its output.

关键词： cryptology hash function MQ problem multivariate polynomials

Study on thermal infrared remote sensing of Yarlung Zangbo River and Bangong Co-Nujiang River suture belt in Qinghai-Tibet Plateau

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Science china(Technological Sciences) 2006年第z2期49卷 108-113页

作者： BI Siwen, YAN Hao & WANG Changyao state key laboratory of Remote Sensing Sciences, Institute of Remote Sensing Application, Chinese Academy of Sciences, beijing 100101, china key laboratory of Three-Dimensional information Acquisition and Application, Ministry of Education, Capital Normal University, beijing 100037, china Chinese Acad Sci Inst Remote Sensing Applicat State Key Lab Remote Sensing Sci Beijing 100101 Peoples R China Capital Normal Univ Minist Educ Key Lab Dimens Informat Acquisit & Applicat Beijing 100037 Peoples R China

The area change of heat abnormity is not in accordance with conclusions of former thermal infrared remote sensing studies of the Qinghai-Tibet Plateau, which were that the temperature of Yarlung Zangbo River suture belt of the southern Plateau is high and the northern temperature is low. The study result in this paper shows that the highest temperature is found in the Bangong Co-Nujiang River suture belt, the Yarlung Zangbo River suture belt temperature is the second highest, and the northern Tibet temperature is the lowest. The study demonstration area was the suture belt areas of the Yarlung Zangbo River and the Bangong Co-Nujiang River in the Qinghai-Tibet Plateau, where the land temperature of the Qinghai-Tibet Plateau and the bore temperature of field land surface were measured and the emissivity of land surface was calculated. In addition, the authors explore the mechanism of the relationship between thermal infrared remote sensing and constructing thermodynamics and reach four new conclusions about the thermodynamics of the Tibet Plateau.

关键词： Qinghai-Tibet Plateau, Yarlung Zangbo River-Bangong Co-Nujiang River, suture belt, thermal infrared remote sensing, heat abnormity.

Study on internal quantum efficiency of blue InGaN multiple-quantum-well with an InGaN underneath layer

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Science china(Technological Sciences) 2010年第2期53卷 306-308页

作者： WANG JiaXing, WANG Lai, ZHAO Wei, ZOU Xiang & LUO Yi National laboratory for information Science and Technology/state key laboratory on Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, beijing 100084, china 1. National laboratory for information Science and Technology/state key laboratory on Integrated Optoelectronics Department of Electronic Engineering Tsinghua University Beijing 100084 China

Blue InGaN multiple-quantum-well (MQW) samples with different InxGa1-xN (x=0.01–0.04) underneath layers (ULs) were grown by metal organic vapor phase epitaxy (MOVPE). Temperature dependent photoluminescence showed that the InGaN UL can improve the internal quantum efficiency (IQE) of MQW effectively due to strain release. And a maximum IQE of 50% was obtained when the thickness and In content of the InGaN UL were 60 nm and 0.01, respectively. Furthermore, the larger In content or thickness of the InGaN UL makes the IQE lower. Arrhenius fit to the experiment data showed that the IQE fall was mainly caused by the quantity increase of the nonradiative recombination centers, which was believed related to the accumulated stress in InGaN ULs.

关键词： InGaN underneath layer (UL) multiple-quantum-well (MQW) internal quantum efficiency (IQE) Arrhenius formula

Dynamic weighted random load balancing algorithm for SIP application server

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The Journal of china Universities of Posts and Telecommunications 2009年第4期16卷 67-70页

作者： TENG Sheng-bo,LIAO Jian-xin,ZHU Xiao-min state key laboratory of Networking and Switching Technology,beijing University of Posts and Telecommunications,beijing 100876,china [a]state key laboratory of Networking and Switching Technology beijing University of Posts and Telecommunications beijing 100876 china

A new load balancing algorithm named dynamic weighed random （DWR） algorithm for the session initiation protocol （SIP） application server cluster is proposed. It uses weighted hashing random algorithm that supports dialog in the SIP protocol to distribute messages. The weight of each server is dynamic adaptive with feedback mechanism. DWR insures that the cluster is balanced, and it performs better than the limited resource vector （LRV） algorithm and minimum sessions first （MSF） algorithm.

关键词： dynamic load balancing weighted random sip application server