检索结果-内蒙古大学图书馆

New segmentation methods of the comet assay images

IFAC Proceedings Volumes 2003年第15期36卷 129-134页

作者： Bogdan Smolka Konstantinos N. Plataniotis Anastasios N. Venetsanopoulos Rastislav Lukac Department of Automatic Control Silesian University of Technology Akademicka 16 Str. 44-101 Gliwice Poland. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada. Slovak Image Processing Center Jarkova 343 049 25 Dobsina Slovak Republic

The single cell gel electrophoresis, called Comet Assay is a microelectrophoretic technique of direct visualization of DNA damage at the cell level. In the comet assay, the cells suspended in an agarose gel on a microscope slide are subjected to lysis, unwinding of DNA and electrophoresis. After staining with fluorescent DNA binding dye, cells with DNA damage display increased migration of genetic material from the cell nucleus. Under the influence of weak, static electric field, charged DNA migrates away from the nucleus forming a so called comet. The damage is quantified by measuring the amount of the genetic material, which migrates from the nucleus to form the comet tail. The foremost advantage of the comet assay is that it analyses individual cells, thus allowing the measurement of the heterogeneity of response within a cell population. In this paper we present three novel methods of the comet tail and head extraction.

关键词： Comet assay Image segmentation Medical applications Image enhancement

来源：评论

学校读者我要写书评

暂无评论

Numerical tools for the study of instabilities within the positive-differential-resistance regions of tunneling devices

Numerical tools for the study of instabilities within the po...

引用

IEEE Conference on Nanotechnology

作者： M.S. Lasater P. Zhao C.T. Kelley D.L. Woolard Center for Research in Scientific Computation and Department of Mathematics North Carolina State University Raleigh NC USA Electrical and Computer Engineering Department North Carolina State University Raleigh NC USA U.S. Army Research Office U. S. Army Research Laboratory NC USA

This paper presents theoretical results on instability processes that occur in the positive-differential-resistance region of nanoscale tunneling structures and reports on efforts to development advanced numerical techniques for use in future optimization studies. These results were obtained from numerical implementations of the Wigner-Poisson electron transport model. Here, the primary focus of the reported research is on developing simulation methods that are adaptive to parallel-computing platforms. Together, these investigations demonstrate the high computational demands associated with modeling fully time-dependent phenomenon in resonant tunneling structures (RTS) and offer new numerical solutions for the rapid and efficient analysis of these types of problems. Furthermore, the simulation tools under development will enable future investigations into new quantum phenomenon that strongly influence instability processes in RTSs.

关键词： Oscillators Quantum well devices Resonant tunneling devices Frequency Power generation Military computing computational modeling Circuits Mathematics Laboratories

来源：评论

学校读者我要写书评

暂无评论

Angular multichannel sigma filter

Angular multichannel sigma filter

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： R. Lukac B. Smolka K.N. Plataniotis A.N. Venetsanopoulos P. Zavarsky Slovak Image Processing Center Dobsina Slovak Republic Department of Automatic Control Silesian University of Technology Gliwice Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto Canada Nagaoka University of Technology Nagaoka Japan

Adaptive nonlinear filtering methods are preferred in situations when it is necessary to adapt a filter behavior for varying signal and noise statistics. In the case of impulsive noise corruption, the problem is stated often as searching for the switching function that allows the filtering effect only to noisy samples. Thus, the undesired smoothing of non-corrupted image areas, which results in blurring, especially of small image structures and details, is reduced. We provide a new adaptive framework between a basic vector directional filter and an identity operation based on the angular multichannel definition of J.S. Lee's sigma filter (see Comp Vision, Graphics, Image Proc., vol.24, no.2, p.255-69, 1983).

关键词： Filtering Adaptive filters Color Smoothing methods Colored noise Noise reduction Image processing Strontium Educational institutions Programmable control

来源：评论

学校读者我要写书评

暂无评论

New approach to the impulsive noise removal in microarray images

引用

IFAC Proceedings Volumes 2003年第15期36卷 145-150页

作者： Rastislav Lukac Bogdan Smolka Konstantinos N. Plataniotis Anastasios N. Venetsanopoulos Slovak Image Processing Center. Jarkova 343. 049 25 Dobsina. Slovak Republic. Department of Automatic Control. Silesian University of Technology. Akademicka 16 Str. 44-101 Gliwice Poland The Edward S. Rogers Sr. Department of Electrical and Computer Engineering. University of Toronto. 10 King's College Road Toronto Canada

In this paper a new method of impulsive noise reduction in microarray images is presented. The new technique is capable of attenuating impulsive noise, while preserving the sharpness of the image edges. Extensive simulations reveal that the new method outperforms significantly the standard techniques widely used in multivariate signal processing. In this work we apply the new noise reduction method for the enhancement of the images of the microarray chips. We demonstrate that the new technique is capable of reducing impulsive noise, which is very often present in the microarray images and that it enables efficient spot localization and estimation of the gene expression level, due to the smoothing effect and preservation of the spot edges. This paper contains the comparison of the efficiency of the new technique of noise reduction with the standard procedures used for the processing of vector valued images, as well as examples of the efficiency of the new algorithm when applied to typical microarray images.

关键词： Impulsive Noise Removal Multichannel lmage Smoothing Gene Chips

来源：评论

学校读者我要写书评

暂无评论

Noisy heart sequences filtering by optimal median based operators

引用

IFAC Proceedings Volumes 2003年第15期36卷 311-316页

作者： Rasto Lukac Bogdan Smolka Pavol Zavarsky Kostas N. Plataniotis Anastasios N. Venetsanopoulos Slovak Image Processing Center Jarkova 343 049 25 Dobsina Slovak Republic Department of Automatic Control Silesian University of Technology Akademicka 16 Str. 44-101 Gliwice Poland Nagaoka University of Technology 1603-1 Kamitomioka 940-2188 Nagaoka Japan The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada

Bit errors and impulses introduced into cardiographic image sequences prohibit to process and evaluate the heart dynamics correctly. Thus, biomedical imaging such as vascular imaging and quantification of heart dynamics is closely related to digital filtering. We provide three-dimensional impulse detection based adaptive median filters designed to perform the optimal filtering situation, where the robust median filter affects only noisy samples, whereas the desired image features remains unchanged. The proposed method holds excellent preserving characteristics and takes the advantage of the superposition property despite the nonlinearity of the median filtering.

关键词： Detection Impulses Median Filters Optimal Filtering Sequences Smoothing

来源：评论

学校读者我要写书评

暂无评论

Human systems integration and advanced technology in engineering department workload and manpower reduction

引用

NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

来源：评论

学校读者我要写书评

暂无评论

Convexity in zero-sum differential games

Convexity in zero-sum differential games

引用

IEEE Conference on Decision and control

作者： R. Goebel Center for Control Engineering & Computation Department of Electrical & Computer Engineering University of California Santa Barbara CA USA

A new approach to two-player zero-sum differential games with convex-concave cost function is presented. It employs the tools of convex and variational analysis. A necessary and sufficient condition on controls to be an open-loop saddle point of the game is given. Explicit formulas for saddle controls are derived in terms of the subdifferential of the function conjugate to the cost. Existence of saddle controls is concluded under very general assumptions, not requiring the compactness of control sets. A Hamiltonian inclusion, new to the field of differential games, is shown to describe equilibrium trajectories of the game.

关键词： Cost function Open loop systems Sufficient conditions Differential equations control engineering control engineering computing Integral equations

来源：评论

学校读者我要写书评

暂无评论

Robust congestion control in high speed communication networks: A model predictive control approach 15th

Robust congestion control in high speed communication networ...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Wang, Hua O. Gu, Yongru Fang, Huajing Department of Electrical and Computer Engineering Duke University DurhamNC27708-0291 United States Center for Nonlinear and Complex Systems Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9783902661746

In this paper, the design of explicit rate-based congestion control in high speed communication networks is considered. At a bottleneck node, there are multiple best-effort sources competing with other high priority cross traffic sources. The goal of congestion control is to achieve high link utilization, low packet loss, low delay, and fairness among the best-effort sources. In this paper, the high priority traffic is described by an autoregressive integrated moving average (ARIMA) process. To deal with the propagation delays associated with the best-effort sources, model predictive control, particularly, generalized predictive control, techniques are proposed to solve the congestion problem here. It is demonstrated that the proposed controller performs well and is robust to delay uncertainties. In addition, in a multiple-nodes configuration, the controller provides max-min fairness. Copyright © 2002 IFAC.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Stochastic learning methods for dynamic neural networks: simulated and real-data comparisons

Stochastic learning methods for dynamic neural networks: sim...

引用

American control Conference (ACC)

作者： K. Patan T. Parisini Institute of Control and Computation Engineering University of Zielona Góra Poland Department of Electrical Electronic and Computer Engineering University of Trieste Trieste Italy

In the paper some stochastic methods for dynamic neural network training are presented and compared. The considered network is composed of dynamic neurons, which contain inner feedbacks. This network can be used as a part of fault diagnosis system to generate residuals. Classical optimisation techniques, based on back propagation idea, suffer from many well-known drawbacks. Two stochastic algorithms are tested as training algorithms to overcome these difficulties. Efficiency of proposed learning methods is checked on two examples: modelling of an unknown linear dynamic system basing on simulated data and modelling of the actuator behaviour in the first section of the evaporation station in the Sugar Factory, Lublin using real data measurements. In these two significant examples, the stochastic learning algorithms are extensively compared from many different perspectives.

关键词： Stochastic processes Learning systems Neural networks Neurons Fault detection Mathematical model Nonlinear dynamical systems Fault diagnosis Neurofeedback Production facilities

来源：评论

学校读者我要写书评

暂无评论

Positive realness and the analysis of a class of 2D linear systems 15th

Positive realness and the analysis of a class of 2D linear s...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Galkowski, K. Paszke, W. Sulikowski, B. Rogers, E. Xu, S. Lam, J. Lin, Z. Owens, D.H. Institute of Control and Computation Engineering University of Zielona Gora Poland Department of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Departament of Electrical and Computer Engineering University of Alberta EdmontonABT6G 2V4 Canada Department of Mechanical Engineering University of Hong Kong Hong Kong School of EEE Nanyang Technological University Nanyang Ave. Singapore639798 Singapore Department of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom

ISBN: (纸本)9783902661746

Repetitive processes are a distinct class of 2D linear systems with applications in areas ranging from long-wall coal cutting and metal rolling operations through to iterative learning control schemes. The main feature which makes them distinct from other classes of 2D linear systems is that information propagation in one of the two independent directions only occurs over a finite duration. This, in turn, means that a distinct systems theory must be developed for them, which can then be translated into efficient routinely applicable controller design algorithms for applications domains. In this paper, we give the first significant results on a positive realness based approach to the analysis of these processes. Copyright © 2002 IFAC.

关键词： Linear systems

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：