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A unified character-based tagging framework for chinese word segmentation

ACM Transactions on Asian Language Information Processing 2010年第2期9卷 1–32页

作者： Zhao, Hai Huang, Chang-Ning Li, Mu. Lu, Bao-Liang Department of Computer Science and Engineering MOE-Microsoft Key Laboratory for Intelligent Computing and Intelligent Systems Shanghai Jiao Tong University 800 Dongchuan Road Minhang District Shanghai 200240 China Language Computing Group Microsoft Research Asia 49 Zhichun Road Haidian District Beijing 100080 China

Chinese word segmentation is an active area in Chinese language processing though it is suffering from the argument about what precisely is a word in Chinese. Based on corpus-based segmentation standard, we launched this study. In detail, we regard Chinese word segmentation as a character-based tagging problem. We show that there has been a potent trend of using a character-based tagging approach in this field. In particular, learning from segmented corpus with or without additional linguistic resources is treated in a unified way in which the only difference depends on how the feature template set is selected. It differs from existing work in that both feature template selection and tag set selection are considered in our approach, instead of the previous feature template focus only technique. We show that there is a significant performance difference as different tag sets are selected. This is especially applied to a six-tag set, which is good enough for most current segmented corpora. The linguistic meaning of a tag set is also discussed. Our results show that a simple learning system with six n-gram feature templates and a six-tag set can obtain competitive performance in the cases of learning only from a training corpus. In cases when additional linguistic resources are available, an ensemble learning technique, assistant segmenter, is proposed and its effectiveness is verified. Assistant segmenter is also proven to be an effective method as segmentation standard adaptation that outperforms existing ones. Based on the proposed approach, our system provides state-of-the-art performance in all 12 corpora of three international Chinese word segmentation bakeoffs. © 2010 ACM 1530-0226/2010/06-ART5 $10.00.

关键词： Learning systems

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Sparse deep belief net for handwritten digits classification

Sparse deep belief net for handwritten digits classification

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2010 International Conference on Artificial Intelligence and Computational Intelligence, AICI 2010

作者： Xie, Jiongyun Lu, Hongtao Nan, Deng Nengbin, Cai MOE-MS Key Laboratory for Intelligent Computing and Intelligent Systems Dept. of Computer Science Shanghai Jiaotong University Shanghai China Shanghai Forensic Center China

ISBN: (纸本)364216529X

It has been shown that the Deep Belief Network is good at modeling input distribution, and can be trained efficiently by the greedy layer-wise unsupervised learning. Hoglak Lee et al. (2008) introduced a sparse variant of the Deep Belief Network, which applied the Gaussian linear units to model the input data with a sparsity constraint. However, it takes much more weight updates to train the RBM (Restricted Boltzmann Machine) with Gaussian visible units, and the reconstruction error is much larger than training an RBM with binary visible units. Here, we propose another version of Sparse Deep Belief Net which applies the differentiable sparse coding method to train the first level of the deep network, and then train the higher layers with RBM .This hybrid model, combining the advantage of the Deep architecture and the sparse coding model, leads to state-of-the-art performance on the classification of handwritten digits. © 2010 Springer-Verlag.

关键词： Character recognition

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A parallel skeleton library for embedded multicores

A parallel skeleton library for embedded multicores

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International Workshop on Scheduling and Resource Management for Parallel and Distributed systems

作者： Liu, Xin Zhou, Jingyu Zhang, Daqiang Shen, Yao Guo, Minyi Department of Computer Science MOE-MS Key Laboratory for Intelligent Computing and Intelligent Systems Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China

ISBN: (纸本)9780769541570

Many SoCs adopt multicore architectures. As a result, embedded programmers are also facing the challenge of parallel programming. We propose a parallel skeleton library that can be used on embedded multicores. Our library is implemented in standard C++ using template features. We propose two parallel skeletons to support common program patterns on multicores. In our skeleton library, programmers can easily choose underlying parallel implementations with no code changes. Experimental results show that many applications can take advantage of these two skeletons for performance improvement, sometimes better than hand-parallelized code. © 2010 IEEE.

关键词： C++ (programming language)

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Comparative analysis of motor imagery on different scales based on brain computer interface

Comparative analysis of motor imagery on different scales ba...

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作者： Li, Junhua Zhang, Liqing Department of Computer Science and Engineering MOE-Microsoft Key Laboratory for Intelligent Computing and Intelligent Systems Shanghai Jiao Tong University Shanghai 200240 China

The event-related brain oscillatory responses have a substantial role in motor imagery experiments. There are two patterns, i.e. event-related desynchronization (ERD) and eventrelated synchronization (ERS). In clinical applications and scientific experiments, an obvious event-related potential (ERP) is pivotal to achieve required tasks. Therefore, we explore how subjects generate the obvious ERP more easily. Eight healthy subjects participated in the experiments and completed motor imagery on two different scales (index finger versus arm). The results indicate that the motor imagery of arm reaches the better performance compared with the motor imagery of index finger. Furthermore, we make a comparative analysis in averaged power spectrum in order to reveal inherent phenomenon. The analysis of power spectrum further confirms that arm motor imagery has an advantage over index finger motor imagery.

关键词： Brain computer interface

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Adaptive robust dynamic surface control of DC torque motors with true parameter estimates

Adaptive robust dynamic surface control of DC torque motors ...

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作者： Li, Zhiping Chen, Jie Gan, Minggang Fang, Hao Zhang, Guozhu Beijing Institute of Technology and Education Ministry Key Laboratory of Complex Systems Intelligent Control and Decision School of Automation Beijing China

ISBN: (纸本)9781424474264

This paper presents an adaptive robust dynamic surface control (ARDSC) algorithm for the position control of DC torque motors which are modeled as third-order nonlinear systems with parametric and nonlinear uncertainties. Based on the dynamic surface control (DSC) approach, the "explosion of terms" problem in the normal adaptive robust control (ARC) is avoided, which enhances the practicability of the controller. Furthermore, besides theoretically proving that the tracking error is uniformly ultimate bounded or asymptotically converge to zero in presence of parametric uncertainties only, the true estimates of the unknown parameters are achieved by designing a novel adaptation law, which improves the system performance and can be used in system monitor and diagnosis on-line as byproducts. Finally, the comparative simulation results illustrate that the proposed algorithm is very effective. © 2010 AACC.

关键词： Position control

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Control system design of inserting machine and its high precision alignment

Control system design of inserting machine and its high prec...

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作者： Yang, Ping Xu, De Key Laboratory of Complex Systems and Intelligent Science Institute of Automation China Craduate School of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 China

A control system for inserting machine is designed in this paper. It consists of a touch screen computer. a small Programmable Logic Controller (PLO,), sensors and servoing drivers to drive the four motion axes. The touch screen computer works as the master computer to realize Human Machine Interface (HMI,). and the PLC as the slave computer. Thr master computer receives the operator's commands, and sends working coordinates file to the slave controller through communication with RS-232C serial port. Thr slave controller outputs pulses to the drivers to control the motions of the four axes. A robust method with optical correction based on a fiber sensor is proposed to realize the high-precision alignment of inserting positions. It measures the accurate position of the ortgtn on the Printed Circutt Board in order to corrrct the positton errors tn coordinates file. The experimental results verify the validity of the proposed method.

关键词： Control systems

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Low Cost Control System with Hierarchy Architecture for Sequencer

Low Cost Control System with Hierarchy Architecture for Sequ...

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The 8th World Congress on intelligent Control and Automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Ping Yang De Xu Key Laboratory of Complex Systems and Intelligent Science Institute of Automation Chinese Academy o Key Laboratory of Complex Systems and Intelligent Science Institute of Automation Chinese Academy o

A low cost control system with hierarchy architecture for sequencer is designed in this paper. A touch screen computer is used as master computer to realize Human Machine Interface (HMI). A programmable logic controller (PLC) works as slave computer to receive sequence ?le and instructions from the master computer. It controls the component arranging, component inspecting, and component taping processes. Manipulating microprocessors work as the slave computers of the PLC. They receive commands from the PLC and control the ampli?ers to drive the rotary electromagnets, which are used to cut off components. A sequence algorithm realized in the PLC is proposed to track the identi?cation (ID) numbers of pallets on the chain. The ID numbers of the pallets are recorded in the PLC at the beginning of sequence procedure, and shifted as long as the movement of the chain. All the ID numbers of the pallets are compared with the ID numbers of component feeders over them. A component is fed into the pallet if its feeder has the same ID number as the pallet. Experimental results verify the validity of the designed control system and the proposed sequence algorithm.

关键词： Sensors Computers Assembly Inspection Control systems Microprocessors DC motors

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Mechanical decision for a class of integral inequalities

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Science China(Information Sciences) 2010年第9期53卷 1800-1815页

作者： YANG Lu1,3,YU WenSheng1,2* & YUAN RuYi2 1Shanghai key laboratory of Trustworthy computing,Software Engineering Institute,East China Normal University,Shanghai 200062,China 2The key laboratory of complex systems and Intelligence Science,Institute of Automation,Chinese Academy of Sciences,Beijing 100190,China 3laboratory for Automated Reasoning and Programming,Chengdu Institute of Computer Applications,Chinese Academy of Sciences,Chengdu 610041,China 1. Shanghai Key Laboratory of Trustworthy Computing Software Engineering Institute East China Normal University Shanghai 200062 China3. Laboratory for Automated Reasoning and Programming Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu 610041 China2. The Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing 100190 China

A class of integral inequalities is transformed into homogeneous symmetric polynomial inequalities beyond Tarski model,where the number of elements of the polynomial,say n,is also a variable and the coefficients are functions of *** is closely associated with some open problems formulated recently by Yang et *** Timofte's dimension-decreasing method for symmetric polynomial inequalities,combined with the inequality-proving package BOTTEMA and a program of implementing the method known as successive difference substitution,we provide a procedure for deciding the nonnegativity of the corresponding polynomial inequality such that the original integral inequality is mechanically decidable;otherwise,a counterexample will be *** effectiveness of the algorithm is illustrated by some more examples.

关键词： integral inequality symmetric polynomial inequality Timofte’s dimension-decreasing method successive difference substitution mechanical decision inequality-proving package BOTTEMA

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Building a Personal High Performance Computer with Heterogeneous Processors

Building a Personal High Performance Computer with Heterogen...

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The Ninth International Conference on Grid and Cloud computing(第九届网格与云计算国际学术会议 GCC 2010)

作者： Qiang Li Ninghui Sun Zhigang Huo National Research Center for Intelligent Computing Systems Beijing 100190 China Key Laboratory of National Research Center for Intelligent Computing Systems Beijing 100190 China Key Laboratory of

Personal high performance computer (PHPC) requires lower cost and high performance. The Teraflops PHPC systems with special accelerator units like GPGPU have been presented, but they have difficulties in programming, compatibility and applicability. In this paper, we present HPPPHPC, a hybrid architecture of heterogeneous processors connected by non-coherent off-chip system bus. The performance of HPP-PHPC is ensured by special processors integrated with vector units and high-efficiency interconnection between heterogeneous processors. And by the adoption of general processors and features like global physical address space and synchroniz ation semantics in hardware, HPP-PHPC is more compatible and convenient for massage passing and PGAS programming model. Also it is more applicable to most applications, including those with many execution branches. Initial results obtained from our prototype system have proved our design.

关键词： HPP-PHPC HPP Controller SSI Global Address Space (GAS)

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Hedge Detection and Scope Finding by Sequence Labeling with Normalized Feature Selection 14

Hedge Detection and Scope Finding by Sequence Labeling with ...

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14th Conference on Computational Natural Language Learning, CoNLL 2010

作者： Zhang, Shaodian Zhao, Hai Zhou, Guodong Lu, Bao-Liang Center for Brain-Like Computing and Machine Intelligence Dept of Computer Science and Engineering Shanghai Jiao Tong University China MOE-Microsoft Key Laboratory for Intelligent Computing and Intelligent Systems Shanghai Jiao Tong University China School of Computer Science and Technology Soochow University China

ISBN: (纸本)1932432841

This paper presents a system which adopts a standard sequence labeling technique for hedge detection and scope finding. For the first task, hedge detection, we formulate it as a hedge labeling problem, while for the second task, we use a two-step labeling strategy, one for hedge cue labeling and the other for scope finding. In particular, various kinds of syntactic features are systemically exploited and effectively integrated using a large-scale normalized feature selection method. Evaluation on the CoNLL-2010 shared task shows that our system achieves stable and competitive results for all the closed tasks. Furthermore, post-deadline experiments show that the performance can be much further improved using a sufficient feature selection. © 2010 Association for Computational Linguistics

关键词： Wooden fences

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