检索结果-内蒙古大学图书馆

Multivariate analysis of gene expression data and missing value imputation based on llsimpute algorithm

ICIC Express Letters 2012年第5期6卷 1335-1339页

作者： Moorthy, Kohbalan Mohamad, Mohd Saberi Deris, Safaai Ibrahim, Zuwairie Artificial Intelligence and Bioinformatics Research Group Faculty of Computer Science and Information Systems 81310 UTM Skudai Johor Malaysia Department of Mechatronics and Robotics Center of Artificial Intelligence and Robotics Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

Microarray ade4 or known as MADE4 is a multivariate software analysis package for microarray gene expression data. This software package is capable of accepting wide variety of gene expression data formats such as Bioconductor Affy Batch and exprSet. This MADE4 R package extends the advantages of ade4 package in multivariate statistical and graphical functions for the use in the microarray data application. Moreover, MADE4 provides new graphical and visualization tools that assist in the interpretation of multivariate analysis of microarray data. Besides that, LLSimpute algorithm has been incorporated to assist in handling of datasets with missing values and this has eased the application for the users to analysis on gene expression data that contain missing values.

关键词： Autocorrelation

来源：评论

学校读者我要写书评

暂无评论

A tuning parameter selector method for the gsvm-scad in determining significant genes and biological pathway

引用

ICIC Express Letters 2012年第4期6卷 851-856页

作者： Misman, Muhammad Faiz Mohamad, Mohd Saberi Deris, Safaai Hashim, Siti Zaiton Mohd Leham, Nurdyana Ibrahim, Zuwairie Artificial Intelligence and Bioinformatics Research Group Faculty of Computer Science and Information Systems 81310 UTM Skudai Johor Darul Takzim Malaysia Department of Mechatronics and Robotics Center for Artificial Intelligence and Robotics Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Darul Takzim Malaysia

A hybrid of support vector machines and a smoothly clipped absolute deviation with group-specific penalty terms (gSVM-SCAD) is a penalized classifier that has been used to identify and select significant pathways in pathway-based microarray analysis. Despite its advantages in identifying significant pathways, the gSVM-SCAD has some limitations, as it depends on the proper choice of tuning parameter. If the tuning parameter is too small, it can bring little sparsity and overfit to the classifier model, while if it is too large, it can make much sparsity to the classifier model and produce poor discriminating power. Therefore, it is important to choose an appropriate tuning parameter selector method for the gSVM-SCAD. The generalized cross validation (GACV) has been widely used as a tuning parameter selector method. Unfortunately, GACV has some limitations where it poorly performs when dealing with the low number of variables (in this paper referred as genes) and large sample sizes. This is because some pathways contain not more than 100 genes and even some pathways contain less than 10 genes. This scenario can lead to the poor performance of SCAD in selecting the informative genes and simultaneously identifying significant ones. In order to surmount the limitations of the gSVM-SCAD, we proposed to use the B-type generalized approximate cross validation (BGACV) as a tuning parameter selector method for gSVM-SCAD. ICIC International © 2012.

关键词： Genes

来源：评论

学校读者我要写书评

暂无评论

Visual and force-feedback guidance for robot-assisted interventions in the beating heart with real-time MRI

Visual and force-feedback guidance for robot-assisted interv...

引用

IEEE International Conference on robotics and Automation (ICRA)

作者： Nikhil V. Navkar Zhigang Deng Dipan J. Shah Kostas E. Bekris Nikolaos V. Tsekos The Computer Graphics & Interactive Media Lab and the Medical Robotics Lab at University of Houston TX USA The Computer Graphics & Interactive Media Lab and Computer Science Department at University of Houston Houston TX USA Methodist DeBakey Heart & Vascular Center Methodist Hospital Houston TX 77030 USA The Computer Science & Engineering Department’ University of Nevada Reno NV USA The Medical Robotics Lab and Computer Science Department at University of Houston Houston TX USA

Robot-assisted surgical procedures are perpetually evolving due to potential improvement in patient treatment and healthcare cost reduction. Integration of an imaging modality intraoperatively further strengthens these procedures by incorporating the information pertaining to the area of intervention. Such information needs to be effectively rendered to the operator as a human-in-the-loop requirement. In this work, we propose a guidance approach that uses real-time MRI to assist the operator in performing robot-assisted procedure in a beating heart. Specifically, this approach provides both real-time visualization and force-feedback based guidance for maneuvering an interventional tool safely inside the dynamic environment of a heart's left ventricle. Experimental evaluation of the functionality of this approach was tested on a simulated scenario of transapical aortic valve replacement and it demonstrated improvement in control and manipulation by providing effective and accurate assistance to the operator in real-time.

关键词： Manipulators Robot kinematics Real time systems Visualization Instruction sets Heart

来源：评论

学校读者我要写书评

暂无评论

Design and validation of a medical robotic system for laser phonomicrosurgery

Design and validation of a medical robotic system for laser ...

引用

25th International Conference on computer Applications in Industry and engineering, CaiNE 2012 and the 4th International Symposium on Sensor Network and Application, SNA 2012

作者： Giallo II, Joseph F. Mattos, Leonardo S. Miller, Sam Neistedt, Zack Draelos, Mark Lee, Gordon Grant, Edward UNC/NCSU Joint BME Dept. Intuitive Surgical Inc. Sunnyvale CA United States Department of Advanced Robotics Istituto Italiano di Tecnologia Genoa Italy Center for Robotics and Intelligent Machines NCSU Raleigh United States Dept. of Electrical and Computer Engineering SanDiego State University San Diego CA 92182-1309 United States NCSU ECE Dept. UNC/NCSU Joint BME Dept. Campus Box 7911 Raleigh NC 27695-7911 United States

ISBN: (纸本)9781880843888

This paper describes the design and validation of a new medical robotic system for automating laser phonomicrosurgeries. Initially, the goal was to design a laser aiming system to improve human control over currently available systems, both medically and ergonomically. However, with the new system, it quickly became apparent that design sub-goals had to be established, in particular sub-goals related to surgical margin definition and for the interactive user interface. To assist the surgeon, the humancomputer interface design needed to be based on a motorized and computer-controlled laser micro-manipulator, controlled remotely via an electronic joystick. With this new system, the surgeon is better placed ergonomically to conduct the surgery, and the prospect of a fully automated procedure became a practicality. This new system was modeled and simulated as well as fabricated, calibrated, and tested. Control algorithms were developed for testing system positional accuracy, consistency, motion scaling, and limitations. The software for automating laser micromanipulator motions, for tumor ablation, was based on active contours for defining tumor ablation margins. Copyright © 2012 by International Society of computers and Their Applications (ISCA).

关键词： Tumors

来源：评论

学校读者我要写书评

暂无评论

Reports of the AAai 2011 conference workshops

Reports of the AAAI 2011 conference workshops

引用

作者： Agmon, Noa Agrawal, Vikas Aha, David W. Aloimonos, Yiannis Buckley, Donagh Doshi, Prashant Geib, Christopher Grasso, Floriana Green, Nancy Johnston, Benjamin Kaliski, Burt Kiekintveld, Christopher Law, Edith Lieberman, Henry Mengshoel, Ole J. Metzler, Ted Modayil, Joseph Oard, Douglas W. Onder, Nilufer O'Sullivan, Barry Pastra, Katerina Precup, Doina Ramachandran, Sowmya Reed, Chris Sariel-Talay, Sanem Selker, Ted Shastri, Lokendra Singh, Satinder Smith, Stephen F. Srivastava, Siddharth Sukthankar, Gita Uthus, David C. Williams, Mary-Anne Department of Computer Science University of Texas at Austin United States Center for Knowledge Driven Information Systems Infosys Labs India Adaptive Systems Section Naval Research Laboratory Washington DC United States Department of Computer Science University of Maryland College Park United States EMC's Center of Excellence in Ireland Research Europe at EMC Ireland Department of Computer Science University of Georgia United States School of Informatics University of Edinburgh United Kingdom Department of Computer Science University of Liverpool United Kingdom Department of Computer Science University of North Carolina Greensboro United States Faculty of Engineering and Information Technology University of Technology Sydney Australia VeriSign Inc. United States Department of Computer Science University of Texas at El Paso United States Machine Learning Department Carnegie Mellon University United States Massachusetts Institute of Technology Media Laboratory United States Carnegie Mellon University's Silicon Valley Campus United States Darrell W. Hughes Program for Religion and Science Dialogue Oklahoma City University United States Department of Computing Science University of Alberta Canada College of Information Studies Institute for Advanced Computer Studies University of Maryland College Park United States Department of Computer Science Michigan Technological University United States Department of Computer Science University College Cork Ireland Cognitive Systems Research Insitute Athens Greece School of Computer Science McGill University Canada Stottler Henke Inc. United States School of Computing University of Dundee United Kingdom Department of Computer Engineering Istanbul Technical University Turkey Convergence Lab Infosys Technologies Ltd. United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor United States Robotics Institute Carnegie Mellon University United States University of Wisconsin

The AAai-11 workshop program was held Sunday and Monday, August 7-18, 2011, at the Hyatt Regency San Francisco in San Francisco, California USA. The AAai-11 workshop program included 15 workshops covering a wide range of topics in artificial intelligence. The titles of the workshops were Activity Context Representation: Techniques and Languages;Analyzing Microtext;Applied Adversarial Reasoning and Risk Modeling;Artificial Intelligence and Smarter Living: The Conquest of Complexity;Artifiicial Intelligence for Data center Management and Cloud Computing;Automated Action Planning for Autonomous Mobile Robots;Computational Models of Natural Argument;Generalized Planning;Human Computation;Human-Robot Interaction in Elder Care;Interactive Decision Theory and Game Theory, 2010;Language-Action Tools for Cognitive Artificial Agents: Integrating Vision, Action, and Language;Lifelong Learning from Sensorimotor Experience;Plan, Activity, and Intent Recognition;and Scalable Integration of Analytics and Visualization. This article presents short summaries of those events. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Human robot interaction

来源：评论

学校读者我要写书评

暂无评论

Landmark-Tree map: A biologically inspired topological map for long-distance robot navigation

Landmark-Tree map: A biologically inspired topological map f...

引用

IEEE International Conference on robotics and Biomimetics

作者： Marcus Augustine Frank Ortmeier Elmar Mair Darius Burschka Annett Stelzer Michael Suppa Otto-von-Guericke University Workgroup Computer Systems in Engineering Magdeburg Germany Department of Computer Science Technische Universität München (TUM) Garching bei München Germany German Aerospace Center (DLR) Institute of Robotics & Mechatronics Wessling Germany

Metric maps provide a reliable basis for mobile robot navigation. However, such maps are in general quite resource expensive and do not scale very well. aiming for a highly scalable map, we adopt theories of insect navigation to develop an algorithm which builds a topological map for global navigation. Similar to insect conduct, positions in space are memorized as snapshots, which are unique configurations of landmarks. Unlike conventional snapshot approaches, we do not simply store the landmarks as a set, but we build a landmark tree which enables us to easily free memory in case of a continuously growing map while still preserving the dominant information. The resulting navigation is not sensor specific and solely relies on the directions of arbitrary landmarks. The generated map enables a mobile robot to navigate between defined locations and let it retrace a previously pursued path. Finally, we verify the reliability of the Landmark-Tree Map (LT-Map) concept and its robustness on memory limitations.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Illumination Normalization using 2D Wavelet

引用

Procedia engineering 2012年 41卷 854-859页

作者： Mehran Emadi Marzuki Khalid Rubiyah Yusof Farhad Navabifar Center for Artificial Intelligence and Robotics University Technology Malaysia International Campus Kuala Lumpur 54100 Malysia emadi.mehran49@*** Tel.: +*** Department of Computer Engineering Mobarakeh Beranch-Islamic Azad University Mobarakeh Esfahan Iran emadi.mehran49@*** Tel.: +***

Pose, expression and illumination variation are some challenges in face verification research area. When lighting condition changes, the appearance of a face varies intensely. In this paper, an illumination normalization method for face verification under various lighting conditions is presented. In the proposed approach, 2D wavelet is applied on the Yale database B and XM2VTS human face databases for illumination normalization in face verification. The performance of the method under illumination variations is improved compared to other pervious methods. Moreover, this procedure is very effective to compensate the shadows and also is very simple and it implements easily in real-time face verification system.

关键词： Face verification Illumination variation 2D wavelet

来源：评论

学校读者我要写书评

暂无评论

Modeling of Visuospatial Perspectives Processing and Modulation of the Fronto-Parietal Network Activity during Action Imitation

Modeling of Visuospatial Perspectives Processing and Modulat...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Hyuk Oh Rodolphe J. Gentili James A. Reggia José L.Contreras-Vidal Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Kinesiology the Maryland Robotics Center and the Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Computer Science and the University of Maryland Institute for Advanced Computer Studies University of Maryland College Park MD 20742 USA Department of Electrical and Computer Engineering University of Houston Houston TX 77004 USA

ISBN: (纸本)9781424441198

It has been suggested that the human mirror neuron system (MNS) plays a critical role in action observation and imitation. However, the transformation of perspective between the observed (allocentric) and the imitated (egocentric) actions has received little attention. We expand a previously proposed biologically plausible MNS model by incorporating general spatial transformation capabilities that are assumed to be encoded by the intraparietal sulcus (IPS) and the superior parietal lobule (SPL) as well as investigating their interactions with the inferior frontal gyrus and the inferior parietal lobule. The results reveal that the IPS/SPL could process the frame of reference and the viewpoint transformations, and provide invariant visual representations for the temporo-parieto-frontal circuit. This allows the imitator to imitate the action performed by a demonstrator under various perspectives while replicating results from the literatures. Our results confirm and extend the importance of perspective transformation processing during action observation and imitation.

关键词： importance observation transformation

来源：评论

学校读者我要写书评

暂无评论

Human pose estimation in surveillance videos using temporal continuity on static pose

Human pose estimation in surveillance videos using temporal ...

引用

2011 International Conference on Image Information Processing, ICIIP 2011

作者： Sharma, Anima Mishra Venkatesh, K.S. Mukerjee, Amitabha Center for AI and Robotics DRDO Complex Bangalore India Department of Electrical Engineering Indian Institute of Technology Kanpur India Department of Computer Science and Engineering Indian Institute of Technology Kanpur India

ISBN: (纸本)9781612848617

Human pose estimation from monocular image sequences is attracting increasing attention, and 2D (image-based) as well as 3D (joint-motion based) approaches have been proposed. The former is computationally fast, and works also for less frequent poses, but reliability is low. The latter is computationally expensive owing to the high-dimensionality of the problem, despite attempts at dimensionality-reduction. We propose to impose temporal continuity constraints on the 2D approaches in order to improve reliability and obtain spatio-temporal descriptions of the action in the image plane. In the first stage, at each frame-level spatial localisation will be done by applying background subtraction, after that static image pose estimation is performed using CRF-based probabilistic assembly of parts, based on the approach by Ramanan [1]. Next, pose continuity is imposed via first-order Markovian constraints on the CRF search. This results in improved spatial accuracy as well as significantly reduced search. We present results from the Weizmann video dataset to demonstrate how such an approach can serve as an image-plane based alternative to full 3D modeling or manifold search. © 2011 IEEE.

关键词： Security systems

来源：评论

学校读者我要写书评

暂无评论

Cortex Inspired Model for Inverse Kinematics Computation for a Humanoid Robotic Finger

Cortex Inspired Model for Inverse Kinematics Computation for...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Rodolphe J. Gentili Hyuk Oh Javier Molina James A. Reggia José L. Contreras- Vidal Department of Kinesiology School of Public Health Maryland Robotics Center Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Systems Engineering and Automation Technical University of Cartagena 30202 Cartagena Spain Department of Computer Science University of Maryland Institute for Advanced Computer Studies University of Maryland College Park MD 20742 USA Department of Electrical and Computer Engineering University of Houston Houston TX 77004 USA

ISBN: (纸本)9781424441198

In order to approach human hand performance levels, artificial anthropomorphic hands/fingers have increasingly incorporated human biomechanical features. However, the performance of finger reaching movements to visual targets involving the complex kinematics of multijointed, anthropomorphic actuators is a difficult problem. This is because the relationship between sensory and motor coordinates is highly nonlinear, and also often includes mechanical coupling of the two last joints. Recently, we developed a cortical model that learns the inverse kinematics of a simulated anthropomorphic finger. Here, we expand this previous work by assessing if this cortical model is able to learn the inverse kinematics for an actual anthropomorphic humanoid finger having its two last joints coupled and controlled by pneumatic muscles. The findings revealed that single 3D reaching movements, as well as more complex patterns of motion of the humanoid finger, were accurately and robustly performed by this cortical model while producing kinematics comparable to those of humans. This work contributes to the development of a bioinspired controller providing adaptive, robust and flexible control of dexterous robotic and prosthetic hands.

关键词： reaching prosthetic providing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：