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MTCrossBit: A dynamic binary translation system based on multithreaded optimization

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Science china(Information Sciences) 2011年第10期54卷 2064-2078页

作者： GUAN HaiBing 1,MA RuHui 1 ,YANG HongBo 1,YANG YinDong 1,LIU Liang 2 & CHEN Ying 2 1 shanghai key laboratory of scalable computing and systems,shanghai jiao tong university,shanghai 200240,china 2 IBM china Research laboratory,Beijing 100101,china 1. shanghai key laboratory of scalable computing and systems Shanghai Jiao Tong University Shanghai 200240 China2. IBM China Research Laboratory Beijing 100101 China

Dynamic optimization has been proposed to overcome many limitations caused by static optimization and is widely applied in dynamic binary translation (DBT) to effectively enhance system ***,almost all the existing dynamic optimization techniques or methods employed in DBT systems for a single-threaded executive environment considerably increase the complexity of the hardware or the striking runtime *** propose a multithreaded DBT framework with no associated hardware called the MTCrossBit,where a helper thread for building a hot trace is employed to significantly reduce the *** addition,the main thread and helper thread are each assigned to different cores to use the multi-core resources efficiently to attain better performance,two novel methods yet to be implemented in the MTCrossBit are presented: the dual-special-parallel translation caches and the new lock-free threads communication mechanism—assembly language communication (ASLC).We then apply quantitative analysis to prove that MTCrossBit can speed up the original ***,we present results from the implementation of the MTCrossBit on the uniprocessor machines with multi-cores utilizing the benchmark-SPECint 2000,and illustrate that we achieved some success with the above concurrent architecture.

关键词： dynamic binary translator hot trace multithreaded framework parallelism multicore

Maximally parallel attribute on P systems: Properties and applications

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Progress in Natural Science:Materials International 2008年第5期18卷 629-632页

作者： Chunyi Huang, Xiaoju Dong BASICS, shanghai jiao tong university, shanghai 200240, china BASICS Shanghai Jiao Tong University Shanghai 200240 China

In this paper, we investigate the maximally parallel attribute of P systems. Some properties of P systems are introduced, which are the lter property and the enumeration property. The two properties are applied to sol... 详细信息

关键词： Membrane computing P systems Maximally parallel

A multi-layer grid approach for fluid animation

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Science china(Information Sciences) 2011年第11期54卷 2269-2278页

作者： TAN Jie 1,2,YANG XuBo 1,2,ZHAO Xin 2 & YANG ZhanXin 21 MOE-Microsoft key Lab for Intelligent computing and System,shanghai jiao tong university,shanghai 200240,china 2 Digital Art Lab,School of Software,shanghai jiao tong university,shanghai 200240,china 1. MOE-Microsoft key Lab for Intelligent computing and System Shanghai Jiao Tong University Shanghai 200240 China2. Digital Art Lab School of Software Shanghai Jiao Tong University Shanghai 200240 China

Real fluid phenomena often present multi-scale behavior,such as tiny splashes and foams in the ocean and small vortexes near the bank of a wide river,which requires sufficiently fine grids and long computational time in the simulation to get adequately resolved *** present a new method to address this issue by solving Navier-Stokes equation on multiple layers of grids with different resolutions or *** governing equations are solved on different layers in successive *** the velocity and pressure fields are synchronized between adjacent layers through the processes of prolongation and *** multi-layer approach enables combining the respective advantages of various grid types,catching the multi-scale behavior of fluids and optimizing the computational *** simple examples,the regular-tetrahedral and the coarse-fine bi-layer grids,are given to illustrate the powerfulness of the multi-layer framework.

关键词： Navier-Stokes equation fluid animation multi-layer grids computer graphics

Car-Parinello molecular dynamics simulations of thionitroxide and S-nitrosothiol in the gas phase,methanol,and water——A theoretical study of S-nitrosylation

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中国科学:化学 2012年第10期42卷 1497-1498页

作者： LIANG Juan1,CHENG ShangLi1,HOU JunWei1,XU ZhenHao1,2 & ZHAO Yi-Lei1,2,3* 1 State key laboratory of Microbial Metabolism,School of Life Sciences and Biotechnology,shanghai jiao tong university,shanghai 200240,china 2 shanghai Center for systems Biomedicine,shanghai jiao tong university,shanghai 200240,china 3 MOE laboratory of Scientific and Engineering computing,shanghai jiao tong university,shanghai 200240,china State key laboratory of Microbial Metabolism School of Life Sciences and Biotechnology shanghai jiao tong university shanghai 200240 china shanghai Center for systems Biomedicine shanghai jiao tong university shanghai 200240 china MOE laboratory of Scientific and Engineering computing shanghai jiao tong university shanghai 200240 china

A dilemma about whether thionitroxide radical(RSNHO) or S-nitrosothiol(RSNO) is observed in protein S-nitrosylation has arisen *** illustrate the effect of chemical environment on these structures,this paper presents quantum mechanical molecular dynamics of thionitroxide,and cis-and trans-S-nitrosothiols in the gas phase,methanol,and *** using Car-Parrinello molecular dynamics(CPMD),we have observed that there is free rotation about the S-N bond at 300 K in thionitroxide,but no such rotation is observed for *** C-S-N-O torsion angle distribution in thionitroxide is significantly dependent upon the surrounding environment,leading to either gauche-,cis-,or *** the case of S-nitrosothiol the C-S-N-O plane is twisted slightly by 5°-15° in the cis-isomer,while the periplanar structure is well-retained in the *** calculated results are in agreement with the X-ray crystallographic data of small molecular RSNO ***,for both compounds,the CPMD simulations show that solvation can cause a decrease in the S-N bond ***,the oxygen atom of thionitroxide is found to be a good hydrogen-bond acceptor,forming an oxyanion-hole-like hydrogen bonding network.

关键词： quantum mechanical molecular dynamics S-nitrosylation thionitroxide S-nitrosothiol solvent effect

Lie Point Symmetries of Differential-Difference Equations

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Communications in Theoretical Physics 2004年第5期41卷 645-648页

作者： DING Wei~1 TANG Xiao-Yan~(2,3) 1 Department of Applied Mathematics,shanghai jiao tong university,shanghai 200030,china2 Department of Physics,shanghai jiao tong university,shanghai 200030,china3 State key laboratory of Scientific and Engineering computing,Institute of Computational Mathematics and Scientific Engineering computing,Academy of Mathematics and System Sciences,the Chinese Academy of Sciences,P.O.Box 2719,Beijing 100080,china State key laboratory of Scientific and Engineering computing Institute of Computational Mathematics and Scientific Engineering Computing Academy of Mathematics and System Sciences the Chinese Academy of Sciences P.O. Box 2719 Beijing 100080 China

In this paper,the classical Lie group approach is extended to find some Lie point symmetries of differential-difference *** reveals that the obtained Lie point symmetries can constitute a Kac-Moody-Virasoro algebra.

关键词： Lie point symmetry differential-difference equation Kac Moody-Virasoro algebra

Asymmetric encryption and signature method with DNA technology

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Science china(Information Sciences) 2010年第3期53卷 506-514页

作者： LAI XueJia1, LU MingXin2, QIN Lei3, HAN JunSong4 & FANG XiWen11Department of Computer Science & Engineering, shanghai jiao tong university, shanghai 200030, china 2School of National Information Security, Nanjing university, Nanjing 210093, china 3BIOCOMPLEX, 4915 Bathurst St. Unit# 209-366, ON M2R 1X9, Canada 4National Engineering Center for BioChip at shanghai, shanghai 201203, china 1. Department of Computer Science & Engineering Shanghai Jiao Tong University Shanghai 200030 China2. School of National Information Security Nanjing University Nanjing 210093 China3. BIOCOMPLEX 4915 Bathurst St. Unit# 209-366 Toronto ON M2R 1X9 Canada4. National Engineering Center for BioChip at Shanghai Shanghai 201203 China

This paper proposes DNA-PKC, an asymmetric encryption and signature cryptosystem by combining the technologies of genetic engineering and cryptology. It is an exploratory research of biological cryptology. Similar to conventional public-key cryptology, DNA-PKC uses two pairs of keys for encryption and signature, respectively. Using the public encryption key, everyone can send encrypted message to a specified user, only the owner of the private decryption key can decrypt the ciphertext and recover the message; in the signature scheme, the owner of the private signing key can generate a signature that can be verified by other users with the public verification key, but no else can forge the signature. DNA-PKC differs from the conventional cryptology in that the keys and the ciphertexts are all biological molecules. The security of DNA-PKC relies on diffcult biological problems instead of computational problems; thus DNA-PKC is immune from known attacks, especially the quantum computing based attacks.

关键词： cryptology asymmetric encryption digital signature biological cryptology DNA

New method for measuring the degree of conflict among general basic probability assignments

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Science china(Information Sciences) 2012年第2期55卷 312-321页

作者： HE You1,HU LiFang1,2,GUAN Xin1,3,DENG Yong4 & HAN DeQiang5 1Research Institute of Information Fusion,Naval Aeronautical and Astronautical university,Yantai 264001,china 2Navy Armament Academy,Beijing 102249,china 3The Institute of Electronic Science and Engineering,National university of Defense Technology,Changsha 410073,china 4School of Electronics and Information Technology,shanghai jiao tong university,shanghai 200240,china 5Institute of Integrated Automation,Xi'an jiaotong university,Xi'an 710049,china 1. Research Institute of Information Fusion Naval Aeronautical and Astronautical University Yantai 264001 China2. Navy Armament Academy Beijing 102249 China3. The Institute of Electronic Science and Engineering National University of Defense Technology Changsha 410073 China4. School of Electronics and Information Technology Shanghai Jiao Tong University Shanghai 200240 China5. Institute of Integrated Automation Xi’an Jiaotong University Xi’an 710049 China

There is doubt about Dempster's rule of combination because of counter-intuitive results when dealing with conflict information in intelligent ***,many modified combination rules have been presented in the literature on multi-source information fusion and reasoning with ***,the issue of identifying conflict among evidence has been ignored.A new parameter measuring conflict evidence called the conflict distance parameter is defined to determine whether there are conflicts in evidence based on the analysis of existing conflict *** the same time,a decisive rule,which a reasonable conflict measure function should satisfy,is put ***,an analysis of two typical counter-intuitive situations is given,showing that the new parameter can not only satisfy the decisive rule,but can also attain the same effect as a two-dimensional measure when deciding whether to use the Dempster's rule of combination,and can exceed its effect when deciding whether to use Dezert-Smarandache theory.

关键词： conflict evidence Dezert-Smarandache theory Dempster’s rule of combination information fusion uncertainty

Rational design of vitamin C/defective carbon van der Waals heterostructure for enhanced activity,durability and storage stability toward oxygen reduction reaction

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Journal of Energy Chemistry 2024年第1期88卷 103-111,I0003页

作者： Ruiqi Cheng Kaiqi Li Huanxin Li Tianshuo Zhao Yibo Wang Qingyue Xue jiao Zhang Chaopeng Fu shanghai key laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Christopher Ingold laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK

Metal-free defective carbon materials with abundant active sites have been widely studied as low-cost and efficient oxygen reduction reaction(ORR)electrocatalysts in metal-air ***,the active sites in defective carbon are easily subjected to serious oxidation or hydroxylation during ORR or storage,leading to rapid degradation of ***,we design a van der Waals heterostructure comprised of vitamin C(VC)and defective carbon(DC)to not only boost the activity but also enhance the durability and storage stability of the DC-VC *** formation of VC van der Waals between DC and VC is demonstrated to be an effective strategy to protect the defect active sites from oxidation and hydroxylation degradation,thus significantly enhancing the electrochemical durability and storage anti-aging ***,the DC-VC van der Waals can reduce the reaction energy barrier to facilitate the *** findings are also confirmed by operando Fourier transform infrared spectroscopy and density functional theory *** is necessary to mention that the preparation of this DC-VC electrocatalyst can be scaled up,and the ORR performance of the largely produced electrocatalyst is demonstrated to be very ***,the DC-VC-based aluminum-air batteries display very competitive power density with good performance maintenance.

关键词： Van der Waals heterostructure Oxygen reduction reaction Stability scalable production Aluminum-air battery

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An Enhanced Semantic Speech Recognition System in Traffic Area

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An Enhanced Semantic Speech Recognition System in Traffic Ar...