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Exploiting remote learners in Internet environment with agents

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Science china(Information Sciences) 2010年第1期53卷 64-76页

作者： LI Ming, WANG Wei & ZHOU ZhiHua National key laboratory for novel software technology, nanjing university, nanjing 2.0093. china 1. National key laboratory for novel software technology Nanjing University Nanjing 210093 China

Data in the Internet are scattered on different sites indeliberately, and accumulated and updated frequently but not synchronously. It is infeasible to collect all the data together to train a global learner for prediction; even exchanging learners trained on different sites is costly. In this paper, aggregative-learning is proposed. In this paradigm, every site maintains a local learner trained from its own data. Upon receiving a request for prediction, an aggregative-learner at a local site activates and sends out many mobile agents taking the request to potential remote learners. The prediction of the aggregative-learner is made by combining the local prediction and the responses brought back by the agents. Theoretical analysis and simulation experiments show the superiority of the proposed method.

关键词： machine learning data mining aggregative-learning mobile agent Internet environment

Incoherent control of two classes of finite-level quantum systems

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Journal of Systems Engineering and Electronics 2011年第4期22卷 679-683页

作者： Chunlin Chen 1,2 and Zhenquan Qin 3,1.Department of Control and System Engineering,nanjing university,nanjing 2.0093.P.R.china 2.State key laboratory for novel software technology,nanjing university,nanjing 2.0093.P.R.china 3.School of software,Dalian university of technology,Dalian 116620,P.R.china Department of Control and System Engineering Nanjing University Nanjing 210093 P. R. China State key laboratory for novel software technology Nanjing University Nanjing 210093 P. R. China School of software Dalian University of Technology Dalian 116620 P. R. China

The incoherent control of finite-level quantum systems is investigated. Following a brief introduction to coherent control paradigms in quantum control, a control problem that can not be accomplished using only coherent control is presented. For such a control problem, it is proved that it can be accomplished using incoherent control based on projective measurement and coherent control for two classes of finite-level quantum systems, i.e., eigenstate controllable quantum systems and wavefunction controllable quantum systems.

关键词： quantum control eigenstate controllability wavefunction controllability coherent control incoherent control.

Loop reduction techniques for reachability analysis of linear hybrid automata

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Science china(Information Sciences) 2012年第12期55卷 2663-2674页

作者： PAN MinXue,LI You,BU Lei & LI XuanDong State key laboratory for novel software technology,Department of Computer Science and technology,nanjing university,nanjing 2.0093.china 1. State key laboratory for novel software technology Department of Computer Science and Technology Nanjing University Nanjing 210093 China

The problem of reachability analysis of linear hybrid automata(LHA) is very *** paper considers to improve the efficiency of the reachability analysis by optimizing the structures of *** identify two types of loops called the flexible loops and the zero loops,and present the techniques to replace the repetitions of those loops in the behavior of LHA with finite sequences of locations and in the meantime simplify the associated *** techniques work not only for the polyhedral computing based algorithms but also for the bounded model checkers.

关键词： real-time and hybrid systems linear hybrid automata reachability analysis

Technical framework for Internetware: An architecture centric approach

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Science in china(Series F) 2008年第6期51卷 610-622页

作者： YANG FuQing1,2, Lü Jian3,4 & MEI Hong1,2 1 key laboratory of High Confidence software Technologies (Peking university), Ministry of Education, Beijing 100871, china 2 School of Electronics Engineering and Computer Science, Peking university, Beijing 100871, china 3 State key laboratory for novel software technology, nanjing 2.0093. china 4 Department of Computer Science and technology, nanjing university, nanjing 2.0093. china 1. key laboratory of High Confidence software Technologies (Peking university) Ministry of Education Beijing 100871 China 2. School of Electronics Engineering and Computer Science Peking University Beijing 100871 China 3. State key laboratory for novel software technology Nanjing 210093 China 4. Department of Computer Science and technology Nanjing University Nanjing 210093 China

Being a new software paradigm evolved by the Internet, Internetware brings many challenges to the traditional software methods and techniques. Sponsored by the national basic research program （973）, researchers in china have developed an architecture centric technical framework for the definition, incarnation and engineering of Internetware. First of all, a software model for Internetware is defined for what to be, including that Internetware entities should be packaged as components, behaving as agents, interoperating as services, collaborating in a structured and on demand manner, etc. Secondly, a middleware for Internetware is designed and implemented for how to be, including that Internetware entities are incarnated by runtime containers, structured collaborations are enabled by runtime software architecture, Internetware can be managed in a reflective and autonomic manner, etc. Thirdly, an engineering methodology for Internetware is proposed for how to do, including the way to develop Internetware entities and their collaborations by transforming and refining a set of software architectures which cover all the phases of software lifecycle, the way to identify and organize the disordered software assets by domain modeling, etc.

关键词： Internetware component software architecture agent middleware

Contourlet HMT model with directional feature

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Science china(Information Sciences) 2012年第7期55卷 1563-1578页

作者： WANG XiangHai 1,2,3 ,CHEN MingYing 1 ,SONG ChuanMing 1,2 ,XU MengChun 1 & FANG LingLing 3 1 College of Computer and Information technology,Liaoning Normal university,Dalian 116029,china 2 State key laboratory for novel software technology,nanjing university,nanjing 2.0093.china 3 Provincial key laboratory for Computer Information Processing technology,Soochow university,Suzhou 215006,china 1. College of Computer and Information technology Liaoning Normal University Dalian 116029 China2. State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China3. Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215006 China

According to Shanno's information theory,the directional feature of texture is defined as the value of directional variable when an image signal attains a singularity of random *** terms of this definition,we calculate the texture's directional features using Tamura's method and study the directional probability distribution of Contourlet *** we find that the directional features tend to be conveyed across parent and child *** on this conclusion,we establish a novel probability distribution model of hidden direction variables under the condition of hidden state variable's distribution,named Contourlet HMT model with directional *** structure and training method of the model are presented as ***,an unsupervised context-based image segmentation algorithm is proposed on the basis of the proposed *** effectiveness is verified via extensive experiments carried out on several synthesized images and remote sensing images.

关键词： directional feature Contourlet HMT Contourlet HMT with directional feature unsupervised texture segmentation

The optimization of replica distribution in the unstructured overlays

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Science china(Information Sciences) 2012年第3期55卷 714-722页

作者： FENG GuoFu1,2 , LI WenZhong2, LU SangLu2, CHEN DaoXu2 & BUYYA Rajkumar3 1School of Information Science, nanjing Audit university, nanjing 210029, china 2.tate key laboratory of novel software technology, nanjing university, nanjing 2.0093. china 3Department of Computer Science and software Engineering, The university of Melbourne, Victoria 3010, Australia 1. School of Information Science Nanjing Audit University Nanjing 210029 China2. State Key Laboratory of Novel Software Technology Nanjing University Nanjing 210093 China3. Department of Computer Science and Software Engineering The University of Melbourne Victoria 3010 Australia

Replication is a widely used technique in unstructured overlays to improve content availability or system performance. A fundamental question often addressed by previous work focused on: how many replicas ought to be allocated for each data item given the fixed query rates and limited storage capability? In this paper, we have put forth two optimal replica distributions to achieve the highest success rate and the lowest message consumption. Especially, we have investigated the influence of item size on replica distribution. Our results show that Square-Root Replication, which is traditionally considered to be optimal, is not always the best choice. Our study offers a new deep understanding of resource managment in self-organized unstructured overlays.

关键词： unstructured overlay item size distribution query rate success rate expected search size

Slicing Java Generic Programs Using Generic System Dependence Graph

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Wuhan university Journal of Natural Sciences 2009年第4期14卷 304-308页

作者： CHEN Lin1,2,XU Baowen1,2 1.State key laboratory for novel software technology,nanjing university,nanjing 2.0093.Jiangsu china 2.Department of Computer Science and technology,nanjing university,nanjing 2.0093.Jiangsu china State key laboratory for novel software technology Nanjing University Nanjing 210093 Jiangsu China Department of Computer Science and technology Nanjing University Nanjing 210093 Jiangsu China

The existing slicing algorithms do not consider parameterized types in generic programs, so they are not suitable for generic programs. To solve this problem, this paper presents a generic system dependence graph for Java generic programs based on the traditional system dependence graph to express dependences for parameterized type information. A novel slicing criterion and slicing algorithm for generic programs is proposed. The slices computed by the algorithm can help to understand relations between concepts and types for generic programs and can express the features of generic programs better.

关键词： slicing system dependence graph generics program analysis

The Report of Virtual Exhibition software Development

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Wuhan university Journal of Natural Sciences 2001年第Z1期6卷 340-346页

作者： Yu Jian xin 1, Sun Yuan hao 1, Gong Zhen yu 2, Cao Jing 2 1. State key laboratory for novel software technology, nanjing university, nanjing 2.0093. china 2. Department of Computer Science and technology, nanjing university,nanjing 2.0093. china State key laboratory for novel software technology Nanjing University Nanjing 210093 China

The main structure and key techniques of our Virtual Exhibition software are summarized. It demonstrates the practice of software Engineering during the development of our project and discusses the use of UML in it.

关键词： software engineering software process software quality assurance software configuration management software configuration item UML virtual reality

Sensitive biosensing strategy based on functional nanomaterials

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Science china Chemistry 2011年第8期54卷 1202-1217页

作者： JU HuangXian State key laboratory of Analytical Chemistry for Life Science Department of Chemistry, nanjing university, nanjing 2.0093. china 1. State key laboratory of Analytical Chemistry for Life Science Department of Chemistry Nanjing University Nanjing 210093 China

The first decade of the 21st century has been labeled as "the sensing decade". The functional nanomaterials offer excellent platforms for fabrication of sensitive biosensing devices, including optical and electronic biosensors. A lot of works have fo- cused on the biofunctionalization of different nanomaterials, such as metal nanoparticles, semiconductor nanoparticles and carbon nanostructures, by physical adsorption, electrostatic binding, specific recognition or covalent coupling. These biofunc- tionalized nanomaterials can be used as catalysts, electronic conductors, optical emitters, carriers or tracers to obtain the ampli- fied detection signal and the stabilized recognition probes or biosensing interface. The designed signal amplification strategies have greatly promoted the development of stable, specific, selective and sensitive biosensors in different fields. This review in- troduces some novel principles and detection strategies in the area of biosensing, based on functional nanomaterials. The gen- eral methods for biofunctionalization of nanomaterials with biomolecules and their biosensing application in immunoassay of protein, DNA detection, carbohydrate analysis and cytosensing are also described.

关键词： nanobiosensing biosensors nanomaterials biofunctionalization signal amplification bioanalysis biological recognition