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Document classification using phrases

Joint IAPR 9th International Workshop on Structural and Syntactic Pattern Recognition, SSPR 2002 and 4th International Workshop on Statistical Techniques in Pattern Recognition, SPR 2002

作者： Bakus, Jan Kamel, Mohamed Pattern Analysis and Machine Intelligence Lab Department of Systems Design Engineering University of Waterloo WaterlooON Canada

ISBN: (纸本)3540440119

This paper presents a Bayes document classifier using phrases as *** e phrases are extracted using a grammar that iteratively applies the rules to the sequence of words in the document. This grammar is generated from a training set using statistical word association. W e report an improvement in the classification over the "bag of words" representation. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Classification (of information)

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Nanodiamond/Ti_(3)C_(2) MXene-coated quartz crystal microbalance humidity sensor with high sensitivity and high quality factor

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Rare Metals 2024年第6期43卷 2719-2729页

作者： Yao Yao Qiao Chen Yan-Qi Li Xian-He Huang Wei-Wei Ling Zhe-MiaoXie Jia-QiWang Chang-Ming Chen College of Communication Engineering Chengdu University of Information TechnologyChengdu 610225China School of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Advanced Micro-/Nano-Devices Lab Department of Systems Design EngineeringUniversity of WaterlooWaterlooON N2L 3GlCanada

To address the challenge of achieving both high sensitivity and a high quality factor in quartz crystal microbalance(QCM)humidity sensors,a nanodiamond(ND)/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor was *** material characteristics of ND,Ti_(3)C_(2)MXene,and ND/Ti_(3)C_(2)MXene composite were analyzed by transmission electron microscopy(TEM)and Fourier transform infrared(FTIR)*** experimental results demonstrated that the hydrophilic ND nanoparticles coated on Ti_(3)C_(2) MXene nanosheet prevented the self-stacking of Ti_(3)C_(2)MXene and enhanced the sensitivity of Ti_(3)C_(2) MXene-based QCM humidity ***,the high mechanical modulus of Ti_(3)C_(2) MXene material helped ND/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor to achieve a high quality factor(>20,000).ND/Ti_(3)C_(2)MXene compositecoated QCM humidity sensor exhibited a sensitivity of 82.45 Hz/%RH,a humidity hysteresis of 1.1%RH,fast response/recovery times,acceptable repeatability,and good stability from 11.3%RH to 97.3%*** response mechanism of ND/Ti_(3)C_(2) MXene composite-coated QCM humidity sensor was analyzed in combination with a bi-exponential kinetic adsorption ***,the potential application of ND/Ti_(3)C_(2)MXene composite-coated QCM humidity sensor was demonstrated through its frequency response to wooden blocks with different moisture contents.

关键词： Humidity sensor Quartz crystal microbalance Nanodiamond Ti_(3)C_(2)MXene High quality factor

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A work domain analysis for virtual private networks

A work domain analysis for virtual private networks

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IEEE International Conference on systems, Man and Cybernetics

作者： J. Kuo C.M. Burns Advanced Interface Design Lab Department of Systems Design Engineering University of Waterloo Canada

For businesses, virtual private networking has become a new method of building corporate communication networks. In addition to providing improved flexibility, security and global reach, virtual private networks (VPNs) can offer substantial cost-savings by reducing the dependence on expensive, private leased-line networks and troublesome remote-access solutions. Unfortunately, the deployment and management of such systems may come at a high cost. Depending on the nature of the business relationship between the enterprise and the Internet Service Provider (ISP), the network manager may have to deal with the increasingly daunting task of configuring, operating, and fixing security leaks and other faults in the system as the communication needs of the organization expand and change. However, a new design technique known as ecological interface design (EID) has been shown to be a promising approach for supporting operator tasks in complex work domains, such as nuclear power plants or petrochemical systems. A distinguishing feature of this approach is that display interfaces are designed by first conducting a work domain analysis (WDA), which focuses on identifying the important goals and environmental constraints that govern system behavior. By visually portraying the relationships between system goals, constraints, and the state of physical components in a structured manner, the problem-solving activities of operators can be effectively supported during abnormal or unanticipated situations. Due to the problem-solving nature of VPN management, interfaces for network management tools can be made more effective through the application of EID principles.

关键词： Virtual private networks Business communication Communication system security Problem-solving Communication networks Costs Web and internet services Power system security Power generation Petrochemicals

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A Method for Developing Data Quality Measures and Metrics for Primary Health Care

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Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care 2016年第1期5卷 28 - 30页

作者： Justin St-Maurice Catherine M. Burns Advanced Interface Design Lab University of Waterloo Ontario Canada Advanced Interface Design Lab University of Waterloo Ontario CanadaCentre for Bioengineering and Biotechnology University of Waterloo Ontario Canada

The secondary use of primary care data has many potential applications. By using data from a local primary care organization, a method for developing data quality measures and metrics in primary care is presented as a case study. The method that was created included an exploratory meeting with a subject matter expert, the creation of a first draft of measures with the information management team, the discussion of the proposed measures with a focus group and a final data quality report encompassing all the collected feedback. The method was used to create rules and formulae to measures timeliness, completeness, accuracy and usefulness in the primary care ecosystem. Future work will involve completing a detailed quantitative analysis of the data quality measures calculated with the proposed metrics. In the future these measures can be broken down and compared on a monthly, professional and users basis to provide insight into the behavior and nuance of data quality in primary care.

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Canyon: Providing location awareness of multiple moving objects in a detail view on large displays 13

Canyon: Providing location awareness of multiple moving obje...

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31st Annual CHI Conference on Human Factors in Computing systems: Changing Perspectives, CHI 2013

作者： Lon, Alexandra Chang, Y.-L. Betty Haller, Michael Hancock, Mark Scott, Stacey D. Media Interaction Lab. University of Applied Sciences Upper Austria Hagenberg Austria Management Sciences University of Waterloo Waterloo ON Canada Systems Design Engineering University of Waterloo Waterloo ON Canada

ISBN: (纸本)9781450318990

Overview+Detail interfaces can be used to examine the details of complex data while retaining the data's overall context. Dynamic data introduce challenges for these interfaces, however, as moving objects may exit the detail view, as well as a person's field of view if they are working at a large interactive surface. To address this "off-view" problem, we propose a new information visualization technique, called Canyon. This technique attaches a small view of an off-view object, including some surrounding context, to the external boundary of the detail view. The area between the detail view and the region containing the off-view object is virtually "folded" to conserve space. A comparison study was conducted contrasting the benefits and limitations of Canyon to an established technique, called Wedge. Canyon was more accurate across a number of tasks, especially more complex tasks, and was comparably efficient. Copyright © 2013 ACM.

关键词： Visualization

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Restructuring rule bases to improve performance 8th

Restructuring rule bases to improve performance

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8th International Symposium on Methodologies for Intelligent systems, ISMIS 1994

作者： Lopez-Suarez, Alex Kamel, M. Lab Department of Systems Design Engineering University of Waterloo WaterlooONN2L 3G1 Canada

ISBN: (纸本)9783540584957

This paper presents a new methodology to restructure rule bases through the combination of Explanation-Based Learning (EBL) and knowledge abstraction techniques. Performance improvements resulting from restructuring are assessed in terms of pattern matching activity during problem solving. The introduction of redundancy that results as a side effect of the restructuring techniques is discussed and algorithms are presented to control it. Examples and experimental results using typical problems are presented. © Springer-Verlag Berlin Heidelberg 1994.

关键词： Pattern matching

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Particle swarm clustering ensemble 08

Particle swarm clustering ensemble

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10th Annual Genetic and Evolutionary Computation Conference, GECCO 2008

作者： Ahmadi, Abbas Karray, Fakhri Kamel, Mohamed Pattern Analysis and Machine Intelligence Lab. Department of Systems Design Engineering University of Waterloo 200 University Avenue West Waterloo ON Canada

ISBN: (纸本)9781605581309

Extracting natural groups of the unlabeled data is known as clustering. To improve the stability and robustness of the clustering outputs, clustering ensembles have emerged recently. In this paper, an ensemble of particle swarm clustering algorithms is proposed. That is, the members of the ensemble are based on the cooperative swarms clustering approaches. The performance of the proposed particle swarm clustering ensemble is evaluated using different data sets and is compared to that of other clustering techniques.

关键词： Particle swarm optimization (PSO)

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Enhancing operator task performance during monitoring for unanticipated events through ecological interface design

Enhancing operator task performance during monitoring for un...

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52nd Human Factors and Ergonomics Society Annual Meeting, HFES 2008

作者： Lau, Nathan Skraaning, Gyrd Jamieson, Greg A. Burns, Catherine M. Cognitive Engineering Laboratory University of Toronto Toronto ON Canada Man-Technology-Organization OECD Halden Reactor Project Halden Norway Advanced Interface Design Laboratory University of Waterloo Waterloo ON Canada

ISBN: (纸本)9781605606859

A full scope simulator study with licensed Nuclear Power Plant (NPP) operators was conducted to evaluate the effectiveness of ecological displays in supporting operators with different types of tasks. The results suggest that ecological displays have a advantage in supporting operator performance during monitoring for unanticipated events as compared to mimic-based displays. Furthermore, ecological displays seem to achieve this performance advantage without imposing workload increases. This study provides supporting evidence that EID is effective at a scale and level of complexity representative of NPP operations.

关键词： Ecology

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A global optimal algorithm for class-dependent discretization of continuous data

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Intelligent Data Analysis 2004年第2期8卷 151-170页

作者： Liu, Lili Wong, Andrew K.C. Wang, Yang PAMI Lab Department of Systems Design Engineering University of Waterloo Waterloo ON N2L 3G1 Canada Pattern Discovery Software Systems Ltd. Unit B9 550 Parkside Drive Waterloo ON N2L 5V4 Canada

This paper presents a new method to convert continuous variables into discrete variables for inductive machine learning. The method can be applied to pattern classification problems in machine learning and data mining. The discretization process is formulated as an optimization problem. We first use the normalized mutual information that measures the interdependence between the class labels and the variable to be discretized as the objective function, and then use fractional programming (iterative dynamic programming) to find its optimum. Unlike the majority of class-dependent discretization methods in the literature which only find the local optimum of the objective functions, the proposed method, OCDD, or Optimal Class-Dependent Discretization, finds the global optimum. The experimental results demonstrate that this algorithm is very effective in classification when coupled with popular learning systems such as C4.5 decision trees and Naive-Bayes classifier. It can be used to discretize continuous variables for many existing inductive learning systems. © 2004-IOS Press and the authors.

关键词： Learning systems

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Analysis and optimization of a non-time based motion controller for a nonholonomic mobile robot

Analysis and optimization of a non-time based motion control...

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2003 IEEE International Symposium on Computational Intelligence in Robotics and Automation, CIRA 2003

作者： Li, Hao Yang, Simon X. Karray, Fakhri Lab. School of Engineering University of Guelph Canada Lab. Dept. of Systems Design Engineering University of Waterloo Canada

ISBN: (纸本)0780378660

In this paper, a non-time based tracking controller of a nonholonomic mobile robot is first analyzed. Non-time based motion controllers have been successfully applied to many areas such as robot motion control, multi-robot coordination, force control, robotic teleoperation and manufacturing automation. However, by the traditional non-time based motion controller many suffer from oscillations in both the linear and angular velocities when there is a large initial tracking error. In this paper, a traditional non-time based tracking controller is optimized using a genetic algorithm, which is used to generate the model parameters that could guarantee the system stability and convergence of tracking error. Simulations using a nonholonomic mobile robot model with a four degree of freedom are conducted to investigate the performance of the proposed controller. The results using the proposed model is compared to those of the conventional model. Generally the proposed model performs better than the conventional model because the genetic algorithm can provide better parameters to minimize tracking error and the oscillation. © 2003 IEEE.

关键词： Genetic algorithms

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