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The OAR Model for Knowledge Representation

The OAR Model for Knowledge Representation

引用

Canadian Conference on Electrical and computer engineering (CCECE)

作者： Yingxu Wang Theoretical and Empirical Software Engineering Research Center Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

The cognitive models of information representation and the mechanisms of long-term memory are fundamental research areas in cognitive informatics. This paper develops an object-attribute-relation (OAR) model for describing knowledge and information representation in the brain. According to the OAR model, the human memory and knowledge are represented by relations, i.e. synaptic connections between neurons, rather than by the neurons themselves as the traditional container metaphor described. Based on the OAR model, human knowledge can be formally described as dynamic conjunctions of the existing OAR and the newly identified or generated objects, attributes, and/or relations. The OAR model can be used to explain a wide range of cognitive mechanisms and mental processes in natural and artificial intelligences such as learning, comprehension, and reasoning

关键词： Knowledge representation Humans Neurons Cognitive informatics Brain modeling Containers Information representation Artificial intelligence Learning software engineering

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A Mathematical Model for Explaining the Mythic Man-Month

A Mathematical Model for Explaining the Mythic Man-Month

引用

Canadian Conference on Electrical and computer engineering (CCECE)

作者： Yingxu Wang Theoretical and Empirical Software Engineering Research Center Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

This paper presents a collaborative work theory for explaining the mythic man-month in software project organization. A mathematical model of the mechanisms and behaviors of group workload in software engineering is created, which reveals the transformability between labor and time in software engineering projects. Based on the model, the actual effort, labor allocation, and project duration can be quantitatively analyzed. A set of laws of work organization for software engineering are formally described, which can be applied in optimizing software engineering decisions on best labor allocations, shortest durations, and lowest costs in project organization

关键词： Mathematical model software engineering Collaborative work Collaborative software Drives Cost function Application software Project management engineering management Standardization

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Design of a Cognitive Complexities Measurement and Analysis Tool

Design of a Cognitive Complexities Measurement and Analysis ...

引用

Canadian Conference on Electrical and computer engineering (CCECE)

作者： Vincent Chiew Yingxu Wang Theoretical and Empirical Software Engineering Research Center Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

The complexities of software systems are more prominent now than ever, due to progression of simple software applications to large integrated systems, either centralized or distributed. The challenges to software engineer somehow to understand and manage such large software systems and deal with software cognitive complexities. Although there are research areas such as human machine interface or human factor engineering, there is still little research on how to quantitatively measure and analyze human cognitive complexities in comprehending and understanding complex software systems. This paper studies human interaction with software programs in the cognitive perspective on software complexity. Based on the findings, a pilot software cognitive complexity measurement and analyses tool (CCMAT) is presented

关键词： software measurement software engineering Cognitive informatics software systems Human factors software tools computer industry Robustness Brain modeling Electric variables measurement

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A detection scheme for frontalis and temporalis muscle EMG contamination of EEG data

A detection scheme for frontalis and temporalis muscle EMG c...

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28th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBS'06

作者： Fu, Michael J. Daly, Janis J. Çavuşoǧlu, M. Cenk Department of Electrical Engineering and Computer Science Case Western Reserve University Cleveland OH 44106 Department of Neurology Case Western Reserve University School of Medicine Cleveland OH 44106 Motor Laboratory FES Center of Excellence LSCDVA Medical Center Cleveland OH 44106

ISBN: (纸本)1424400325

Electroencephalogram (EEG) recordings are highly susceptible to noise from electromyogram (EMG) signals of the frontalis and temporalis muscles. In this paper, we propose and evaluate a new method for detecting frontalis and temporalis muscle EMG contamination In EEG signals based on recent findings on topographic and spectral characteristics of cranial EMG. © 2006 IEEE.

关键词： Data recording

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Hot Block Ring Counter: A Low Power Synchronous Ring Counter

Hot Block Ring Counter: A Low Power Synchronous Ring Counter

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International Conference on Microelectronics, ICM

作者： Mohammad Dastjerdi-Mottaghi Anahita Naghilou Masoud Daneshtalab Ali Afzali-Kusha Zainalabedin Navabi Nanoelectronics Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Department of Electrical and Computer Engineering Northeastern University Boston USA

In this paper, we propose a new and low-power architecture for synchronous ring counters which can noticeably reduce the switching activity of the conventional ring counters. To achieve the goal we partition the ring counter into some blocks for each of which we use a special clock gator. The Hot block (the block in which the '1' exists) is the only block the flip-flops of which are clocked. The delay and area overhead of the proposed clock gator is independent of the block size; this enables designer to freely resize the blocks and compromise with area and power overheads. The latency increase in the proposed architecture is independent of the counter width and depends only on the technology. For 90 nm technology it increases the latency by 5%. The architecture noticeably (about 85%) reduces the total switching activity of the counter especially for wide counters.

关键词： Counting circuits Clocks Flip-flops Nanoelectronics Delay Logic circuits computer architecture Latches Switching circuits Energy consumption

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Designing semantics-preserving cluster representatives for scientific input conditions 06

Designing semantics-preserving cluster representatives for s...

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15th ACM Conference on Information and Knowledge Management, CIKM 2006

作者： Varde, Aparna S. Rundensteiner, Elke A. Ruiz, Carolina Brown, David C. Maniruzzaman, Mohammmed Sisson Jr., Richard D. Department of Computer Science Worcester Polytechnic Institute Worcester MA United States Center for Heat Treating Excellence Worcester Polytechnic Institute Worcester MA United States Department of Mechanical Engineering Worcester Polytechnic Institute Worcester MA United States

ISBN: (纸本)1595934332

In scientific domains, knowledge is often discovered from experiments by grouping or clustering them based on the similarity of their output. The causes of similarity are analyzed based on the input conditions characterizing a given type of output, i.e., a given cluster. This analysis helps in applications such as decision support in industry. Cluster representatives form at-a-glance depictions for such applications. Randomly selecting a set of conditions in a cluster as its representative is not sufficient since distinct combinations of inputs could lead to the same cluster. In this paper, an approach called DesCond is proposed to design semantics-preserving cluster representatives for scientific input conditions. We define a notion of distance for conditions to capture semantics based on the types of their attributes and their relative importance. Using this distance, methods of building candidate cluster representatives with different levels of detail are proposed. Candidates are compared using the DesCond Encoding proposed in this paper that assesses their complexity and information loss, given user interests. The candidate with the lowest encoding for each cluster is returned as its designed representative. DesCond is evaluated with real data from Materials Science. Evaluation with domain expert interviews and formal user surveys shows that designed representatives consistently outperform randomly selected ones and different candidates suit different users. Copyright 2006 ACM.

关键词： Semantics

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software Requirements Retrieval Using Use Case Terms and Structure Similarity Computation

Software Requirements Retrieval Using Use Case Terms and Str...

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Asia-Pacific Conference on software engineering

作者： Akadej Udomchaiporn Nakornthip Prompoon Pizzanu Kanongchaiyos Department of Mathematics and Computer Science Faculty of Science King Mongkut''s Institute of Technology Ladkrabang Thailand Center of Excellent in Software Engineering Department of Computer Engineering Faculty of Engineering Chulalongkom University Thailand

For a large scale of software development, there is a tremendous number of software requirements documents in a collection which may be produced for different domains by different developer teams. They may be later reused to reduce cost and time for the next development. Thus, there is a need to retrieve ones that meet user's need efficiently. This paper presents an approach for software requirements specification retrieval in a form of use case description using use case structure and similarity computation between terms of use case query and use cases in the collection. The contribution of the paper has five main points; 1) the approach for retrieving use case description is proposed, 2) the developed tool supporting the approach is presented, 3) the experiment is designed to measure effectiveness of the approach, 4) the results of the experiment are shown to compare effectiveness of the approach to that of a general approach, and finally 5) the recommended use case description query template is proposed.

关键词： Programming Costs Unified modeling language software engineering Production software quality Mathematics computer science Large-scale systems software systems

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High SNR flexible top hat monopole probe for 1.5 T MRI

High SNR flexible top hat monopole probe for 1.5 T MRI

引用

作者： Mohammadzadeh, M. Shahabadi, M. Soltanian-Zadeh, H. Tavakoli, A. Rafiei, B. Javidnia, D. Oghabian, M.A. Department of Physics Amir-Kabir University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI United States Department of Electrical Engineering Amir-Kabir University of Technology Tehran Iran Medical Imaging Center Imam Khomeyni Hospital Tehran Iran Research Center for Science and Technology in Medicine Tehran University of Medical Sciences Tehran Iran

In this paper, design principles and application of a thin and flexible intravascular top hat monopole probe with increased signal-to-noise ratio (SNR) and improved longitudinal and radial coverage are described and compared with the conventional monopole probe. The top hat probe is constructed by removing a segment of the shield of a coaxial cable. A flexible thin copper foil in contact with the inner conductor of the cable is added to the end section of the cable. The copper foil acts as an antenna top hat load increasing the uniformity of the current distribution on the probe and establishes a uniform region of SNR distribution around the probe. Improvement of the SNR distribution of the top hat probe relative to the conventional monopole probe is evaluated using quantitative indices. Experimental results show that for the top hat probe, the ratio of the maximum image SNR to its relative standard deviation (SR) is 2.73 times higher than that of a conventional probe. © 2006 IOP Publishing Ltd.

关键词： Medical imaging

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JAAT: Java alias analysis tool for program maintenance activities

JAAT: Java alias analysis tool for program maintenance activ...

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International Symposium on Object-Oriented Real-Time Distributed Computing

作者： F. Ohata K. Inoue Toshiba Software Engineering Center Kawasaki Japan Department of Computer Science Osaka University Osaka Japan

Alias analysis is a method for extracting sets of expressions which may possibly refer to the same memory locations during program execution. Although many researchers have already proposed analysis methods for the purpose of program optimization, difficulties still remain in applying such methods to practical software engineering tools in the sense of precision, extensibility and scalability. Focusing mainly on a practical use for program maintenance activities such as program debugging and understanding, we propose an alias analysis method for object-oriented programs and discuss our implementation. Using this method, we have developed a tool named JAAT. Our proposed method employs a two-phase, on-demand, and instance-based algorithm, in which intra-class analysis is done in phase 1 for whole programs and libraries, and inter-class analysis is done in phase 2 only for a user-demanded target. JAAT can analyze large programs or libraries such as JDK class library. Also, JAAT includes various features for program maintenance activities, such as GUI for displaying aliases, and an XML database for storing analysis information

关键词： Java Libraries Algorithm design and analysis Optimization methods software engineering Scalability Debugging Graphical user interfaces XML Spatial databases

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Auto-tune Predictive Control of Switched Reluctance Motor

Auto-tune Predictive Control of Switched Reluctance Motor

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Arash Sadeghzadeh Babak N. Araabi Control and Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Tehran Iran

This paper is based our previous work on model predictive control (MPC) of switched reluctance motor (SRM). A local linear neuro-fuzzy model is used to model SRM. Then a MPC schema is devised considering an appropriate energy term in the objective function during optimization phase. Commutation occurs naturally as an outcome of the predictive control design process, not as an extra step added to the control policy. In this paper, an adaptive -time varying- objective function is proposed to better cope with nonlinear nature of the SRM. A fast and easy algorithm is devised to adjust the weights in the objective function. This new algorithm allow for an auto-tune MPC approach to SRM control. From a computational view point, we use locally linear model predictive control that with a quadratic cost and linear constraints reduces to a simple quadratic programming, which can be solved very fast in a closed form. Simulation studies justify applicability of our proposed method and algorithm to SRM applications

关键词： Predictive control Reluctance motors Predictive models Magnetic materials Photonic crystals Reluctance machines Commutation Costs Strontium Power system modeling

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