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Learning implicit information in Bayesian games with knowledge transfer

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Control Theory and Technology 2020年第3期18卷 315-323页

作者： Guanpu CHEN kai cao Yiguang HONG Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we consider to learn the inherent probability distribution of types via knowledge transfer in a two-player repeated Bayesian game,which is a basic model in network *** the Bayesian game,the attacker's distribution of types is unknown by the defender and the defender aims to reconstruct the distribution with historical *** is dificult to calculate the distribution of types directly since the distribution is coupled with a prediction function of the attacker in the game ***,we seek help from an interrelated complete-information game,based on the idea of transfer *** provide two different methods to estimate the prediction function in difftrent concrete conditions with knowledge *** obtaining the estimated prediction function,the deiender can decouple the inherent distribution and the prediction function in the Bayesian game,and moreover,reconstruct the distribution of the attacker's ***,we give numerical examples to illustrate the effectiveness of our methods.

关键词： Bayesian game repeated game knowledge transfer security

Sensor node-assisted asynchronous cooperative spectrum sensing for cognitive radio network

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The Journal of China Universities of Posts and Telecommunications 2014年第5期21卷 17-23页

作者： cao kai-tian WANG Dong-lin Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications National Mobile Communications Research Laboratory Southeast University Department of Electrical and Computer Engineering New York Institute of Technology (Nanjing Campus)

In order to take advantage of the asynchronous sensing information, alleviate the sensing overhead of secondary users （SUs） and improve the detection performance, a sensor node-assisted asynchronous cooperative spectrum sensing （SN-ACSS） scheme for cognitive radio （CR） network （CRN） was proposed. In SN-ACSS, each SU is surrounded by sensor nodes （SNs）, which asynchronously make hard decisions and soft decisions based on the Bayesian fusion rule instead of the SU. The SU combines these soft decisions and makes the local soft decision. Finally, the fusion center （FC） fuses the local soft decisions transmitted from SUs with different weight coefficients to attain the final soft decision. Besides, the impact of the statistics of licensed band occupancy on detection performance and the fact that different SNs have different sensing contributions are also considered in SN-ACSS scheme. Numerical results show that compared with the conventional synchronous cooperative spectrum sensing （SCSS） and the existing ACSS schemes, SN-ACSS algorithm achieves a better detection performance and lower cost with the same number of SNs.

关键词： cognitive radio asynchronous cooperative spectrum sensing Bayesian fusion rule ON-OFF model soft decision

The theory of early nonlinear stage of m=1 instability with locally flattened q-profile

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Matter and Radiation at Extremes 2018年第5期3卷 243-247页

作者： kai-Qi cao Xian-Qu Wang Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengduSichuan 610031China

In this paper,we analyze the modification of fast particles on the nonlinear radial displacement of m=1 internal kink mode with a shoulderlike equilibrium current *** the matching method on the solutions of the outer and inner regions,we derive the analytical form of nonlinear radial displacement in the limit of q'=q"=0,which is valid to the cases of weak shear due to a slight flattening of the q(r)profile around q=*** have taken into consideration the effects of the circulating and trapped fast particles on the nonlinear state of the *** is found that a fast particle can modify the nonlinear saturation level by the change of potential energy,depending on the fast particle *** the matching of linear dispersion relation to early nonlinear result,we also obtain the relations of radial displacement to the mode frequency and linear growth rate,and discuss the scaling for different stabilities of the MHD modes.

关键词： Tokamak Magnetohydrodynamics Weak magnetic shear Internal kink mode Fast particle

The DFF-PSP Iterative Separation and Theoretical Bound for PCMA with Long Memory

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Chinese Journal of Electronics 2016年第5期25卷 880-885页

作者： CUI Penghui JIANG Hua cao kai LI Taozhu National Digital Switching Engineering Technological Research Center

This paper proposes the Decision feedbackfeedforward per-survivor processing(DFF-PSP) iterative separation algorithm and the Monte Carlo integrationbased method to compute the theoretical bound for Paired carrier multiple access(PCMA) Single channel blind separation(SCBS) which is highly complex with long memory. The truncated PSP is employed while the pre- and post- cursors are disregarded to control the *** delayed decisions feedforward and local decisions feedback filters are designed to process the pre- and postcursors. The Bit-interleaved code modulation iterative decoder(BICM-ID) is combined with the second soft decision of the truncated PSP to obtain a better *** mixture signal model is regarded as a Multiple-access channel(MAC) with memory, and the theoretical performance bound is obtained via entropy inequality, Monte Carlo integration and Fano inequality. Simulation results show that the DFF-PSP iterative separation provides the good tradeoff between complexity and performance.

关键词： Paired carrier multiple access(PCMA) Single channel blind separation(SCBS) Decision feedbackfeedforward Per-survivor processing Bit-interleaved code modulation iterative decoder(BICM-ID) Multiple-access channel(MAC) Theoretical performance bound

SYNTHESIS AND CHARACTERIZATION OF Fe(Ⅱ-COORDINATED PS-b-P[NIPAM-co-(VBC-Fe-DMAP)]BLOCK COPOLYMERS

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Chinese Journal of Polymer Science 2012年第5期30卷 674-681页

作者： kai cao 徐君庭王晓松 Department of Materials Science and Engineering East China University of Science and TechnologyShanghai200237China MOE key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of Chemistry Waterloo Institute of NanotechnologyUniversity of Waterloo200 University Avenue WestWaterlooONN2L 3G1Canada

In this work, a new type of block polymers, polystyrene-b-poly[（N-isopropyl acrylamide）-co-（vinyl benzyl chloride）] （PS-b-P（NIPAM-co-VBC））, was prepared via reversible addition fragmentation transfer polymerization, then pentacyano（4-（dimethylamino pyridine））ferrate （Fe-DMAP） was attached to VBC units through a quatemization process. The Fe（II）-coordinated PS-b-P[NIPAM-co-（VBC-Fe-DMAP）] block copolymers were characterized by 1H-NMR, FT-IR and TGA. The self-assembly behavior of the block copolymers was also investigated and the micelle morphology was characterized by TEM. It was found that the PS-b-P（NIPAM-co-VBC） block polymer and Fe-coordinated block copolymer could both form spherical micelles in DMF/MeOH mixed solvent.

关键词： Micelle Block copolymer Metallic organic polymer.

Analysis of severe core damage accident progression for the heavy water reactor

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Nuclear Science and Techniques 2010年第4期21卷 251-256页

作者： TONG Lili YUAN kai YUAN Jingtian cao Xuewu School of Mechanical Engineering Shanghai Jiao Tong University' Shanghai 200240 China

In this study,the severe accident progression analysis of generic Canadian deuterium uranium reactor 6 was preliminarily provided using an integrated severe accident analysis *** selected accident sequences were multiple steam generator tube rupture and large break loss-of-coolant accidents because these led to severe core damage with an assumed unavailability for several critical safety *** progressions of severe accident included a set of failed safety systems normally operated at full power,and initiative events led to primary heat transport system inventory blow-down or boil *** core heat-up and melting,steam generator response,fuel channel and calandria vessel failure were *** results showed that the progression of a severe core damage accident induced by steam generator tube rupture or large break loss-of-coolant accidents in a CANDU reactor was slow due to heat sinks in the calandria vessel and vault.

关键词：重水反应堆损坏事故蒸汽发生器堆芯 CANDU堆严重事故热传输系统事故分析

A Bio-Inspired Biped Water Running Robot Incorporating the Watt-I Planar Linkage Mechanism

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Journal of Bionic Engineering 2013年第4期10卷 415-422页

作者： Linsen Xu Tao Mei Xianming Wei kai cao Mingzhou Luo Hefei Institutes of Physical Science Chinese Academy of Science Hefei 230031 P. R. China University of Science and Technology of China Hefei 230026 P. R. China Changzhou Institute of Advanced Manufacturing Technology Changzhou 213164 P. R. China

In this paper, a biped water running robot is developed by mimicking the water-running pattern of basilisk lizards. The dynamic mechanism of the robot was studied based on Watt-I planar linkages, and the movement trajectory of the double bar Assur Group was deduced to simulate the water-running foot trajectories of the basilisk lizard. A Central Pattern Generator （CPG）-based fuzzy control method was proposed to control the robot for realizing balance control and gait adjustment. The effectiveness of the proposed control method was verified on the prototype of a water running robot （weight： 320 g）. When the biped robot is running on water, the average force generated by the propulsion mechanism is 1.3 N, and the robot body tilt angle is 5~. The experiment results show that the propulsion mechanism is effective in realizing the basilisk lizards-like water running patterns, and the CPG-based fuzzy control method is effective in keeping the balance of the robot.

关键词： bio-inspired robot basilisk lizards-like robot biped water running CPG-based fuzzy control

Development of a subchannel code for blockage accidents of LMFRs based on the 3D fuel rod model

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Nuclear Science and Techniques 2022年第3期33卷 30-44页

作者： Xiao Luo Lian-kai cao Wen-Pei Feng Hong-Li Chen School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China

To predict the thermal-hydraulic(T/H)parameters of the reactor core for liquid-metal-cooled fast reactors(LMFRs),especially under flow blockage accidents,we developed a subchannel code called *** code uses a time-dependent,four-equation,singlephase flow model together with a 3D heat conduction model for the fuel rods,which is solved by numerical methods based on the finite difference method with a staggered *** to the local effect of the blockage on the flow field,low axial flow,increased forced crossflow,and backflow *** more accurately simulate this problem,we implemented a robust and novel solution *** verified the code with a low-flow(~0.01 m/s)and large-scale blockage *** the preliminary validation,we compared our results with the experimental data of the NACIE-UP BFPS blockage test and the KIT19ROD blockage *** results revealed that KMC-FB has sufficient solution accuracy and can be used in future flow blockage analyses for LMFRs.

关键词： Subchannel method Code development Blockage accident Liquid-metal-cooled fast reactor

Continuous-Time Distributed Algorithms for Solving Linear Algebraic Equation 36

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Continuous-Time Distributed Algorithms for Solving Linear Al...