检索结果-内蒙古大学图书馆

作者： Wakeland, Wayne W. Martin, Robert H. Raffo, david Systems Science Ph.D. Program Portland State University P.O. Box 751 Portland OR 97207 United States Software Management Consulting 2017 Maple Terrace West Linn OR 97068 United States School of Business Administration Portland State University P.O. Box 751 Portland OR United States Portland State University P.O. Box 751 Portland OR 97207 United States

Hybrid simulation models combine the high-level project issues of System dynamics models with the process detail of discrete event simulation models. Hybrid models not only capture the best of both of these simulation paradigms, but they also are able to address new issues that are important in managing complex real-world development projects that neither the System dynamics nor discrete Event simulation paradigms are able to address alone. In order to reap the full benefits from a simulation model, a structured approach for analyzing model results is necessary. This article applies design of Experiments (dOE) and broad range sensitivity analysis (BRSA) to a hybrid system dynamics and discrete event simulation model of a software development process. dOE is used to analyse the interaction effects, such as the degree to which the impact of the process change depends on worker motivation, schedule pressure and other project environmental variables. The sensitivity of the model to parameter changes over a broad range of plausible values is used to analyse the non-linear aspects of the model. The end result is a deeper insight into the conditions under which the process change will succeed, and improved recommendations for process change design and implementation. In this particular study, significant interactions and non-linearities were revealed, supporting the hypothesis that consideration of these complex effects is essential for insightful interpretation of model results and effective decision-making. Copyright © 2004 John Witey & Sons, Ltd.

关键词： Software engineering

来源：评论

学校读者我要写书评

暂无评论

Artificial Neural Network Implementation Using Many-Valued Quantum Computing

Artificial Neural Network Implementation Using Many-Valued Q...

引用

International Joint Conference on Neural Networks 2003

作者： Al-Rabadi, Anas N. Lendaris, George G. Systems Science Ph.D. Program Portland State University Portland OR United States

Neural network (NN) implementation using the general scheme of many-valued (MV) quantum computing (QC) is presented in this paper. The proposed method uses the many-valued orthonormal computational basis states to implement such computations. physical implementation of NNQC is performed by controlling the potential to yield specific wavefunction as a result of solving Shrodinger's equation that governs the dynamics of QC.

关键词： Neural networks

来源：评论

学校读者我要写书评

暂无评论

Using design of experiments, sensitivity analysis, and hybrid simulation to evaluate changes to a software development process: a case study

引用

Software Process: Improvement and Practice 2004年第2期9卷

作者： Wayne W. Wakeland Robert H. Martin david Raffo Systems Science Ph.D. Program Portland State University P.O. Box 751 Portland OR 97207 USA Software Management Consulting 2017 Maple Terrace West Linn OR 97068 USA School of Business Administration Portland State University P.O. Box 751 Portland Oregon USA

关键词： software process model hybrid simulation design of experiments sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

Accelerating Critic Learning in Approximate dynamic programming Via Value Templates and Perceptual Learning

Accelerating Critic Learning in Approximate Dynamic Programm...

引用

International Joint Conference on Neural Networks 2003

作者： Shannon, Thaddeus T. Santiago, Roberto A. Lendaris, George G. NW Compl. Intelligence Laboratory Systems Science Ph.D. Program Portland State University Portland OR United States

The concept of value templates and perceptual learning are introduced as refinements to the reinforcement learning (RL) paradigm. We demonstrate a method for accelerating dual Heuristic programming (dHP) critic training using value templates and perceptual learning. Both faster and more stable learning are achieved by using the value template and utilizing its inherent constraints to regularize the perceptual learning task. The method is demonstrated by tuning a neurofuzzy control system for a highly nonlinear 2nd order plant proposed by Sanner and Slotine. We take advantage of the TSK model framework throughout to keep the controller, critic, and model components used in dHP highly interpretable.

关键词： Learning systems

来源：评论

学校读者我要写书评

暂无评论

Controller design via Adaptive Critic and Model Reference Methods

Controller Design via Adaptive Critic and Model Reference Me...

引用

International Joint Conference on Neural Networks 2003

作者： Lendaris, G.George Santiago, Roberta McCarthy, Jay Carroll, Michael Systems Science Ph.D. Program Electrical and Computer Engineering Portland State University Portland OR 97201 United States Systems Science Ph.D. Program Portland State University Portland OR 97201 United States Electrical Engineering Department Portland State University Portland OR 97201 United States Computational Neuroscience University of Chicago Chicago IL United States

dynamic programming (dP) is a principled way to design optimal controllers for certain classes of nonlinear systems;unfortunately, dP is computationally very expensive. The Reinforcement Learning methods known as Adaptive Critics (AC) provide computationally feasible means for performing approximate dynamic programming (AdP). The term 'adaptive ' in A C refers to the critic 's improved estimations of the Value Function used by dP. To apply dP, the user must craft a Utility function that embodies all the problem-specific design specifications/criteria. Model Reference Adaptive Control methods have been successfully used in the control community to effect on-line redesign of a controller in response to variations in plant parameters, with the idea that the resulting closed loop system dynamics will mimic those of a Reference Model. The work reported here 1) uses a reference model in AdP as the key information input to the Utility function, and 2) uses AdP off-line to design the desired controller. Future work will extend this to on-line application. This method is demonstrated for a hypersonic shaped airplane called LoFL YTE®;its handling characteristics are natively a little "hotter" than a pilot would desire. A control augmentation subsystem is designed using AdP to make the plane "feel like " a better behaved one, as specified by a Reference Model. The number of inputs to the successfully designed controller are among the largest seen in the literature to date.

关键词： Adaptive control systems

来源：评论

学校读者我要写书评

暂无评论

Artificial neural network implementation using many-valued quantum computing

Artificial neural network implementation using many-valued q...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： A.N. Al-Rabadi G.G. Lendaris Portland State Univ. OR USA Systems Science Ph.D. Program at Portland State University USA

关键词： Quantum computing Artificial neural networks Computer networks Neural networks Quantum entanglement Quantum mechanics Schrodinger equation Grid computing physics computing Logic gates

来源：评论

学校读者我要写书评

暂无评论

Modeling intracranial fluid flows and volumes during traumatic brain injury to better understand pressure dynamics

Modeling intracranial fluid flows and volumes during traumat...

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： W. Wakeland J. McNames M. Aboy d. Hollemon B. Goldstein Systems Science Ph.D. Program Portland State University Portland OR USA Biomedical Signal Processing Laboratory Electrical and Computer Engineering Portland State University Portland OR USA Complex Systems Laboratory Division of Pediatric Critical Care Oregon Health and Sciences University Portland OR USA

We describe a computer model of intracranial pressure (ICP) dynamics that evaluates clinical treatment options for elevated ICP during traumatic brain injury (TBI). The model uses fluid volumes as primary state variables and explicitly models fluid flows as well as the resistance, compliance, and pressure associated with each intra- and extracranial compartment (arteries and arterioles, capillary bed, veins, venous sinus, ventricles, and brain parenchyma). The model evaluates clinical events and therapies such as intraand extra-parenchymal hemorrhage, cerebral edema, cerebrospinal fluid drainage, mannitol administration, head elevation, and mild hyperventilation. The model is able to replicate observed clinical behavior in many cases, including elevated ICP associated with severe cerebral edema following subdural, epidural, or intraparenchymal hematoma. The model also mimics cerebrovascular regulatory mechanisms that are activated during TBI.

关键词： Brain modeling Brain injuries Fluid dynamics Blood Logic Laboratories Fluid flow Medical treatment Signal processing Cranial pressure

来源：评论

学校读者我要写书评

暂无评论

Significance of intracranial pressure pulse morphology in pediatric traumatc brain injury

Significance of intracranial pressure pulse morphology in pe...

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： M. Aboy J. McNames d. Cuesta-Frau W. Wakeland T. Thong S. Lai B. Goldstein Biomedical Signal Processing Laboratory Electrical and Computer Engineering Portland State University Portland OR USA Computer Vision Group ETS-Alcoi Polytechnic University of Valencia Spain Systems Science Ph.D. Program Portland State University Portland OR USA Biomedical Engineering OGI School of Science and Engineering Oregon Health and Sciences University Portland OR USA Complex Systems Laboratory Department of Pediatrics Oregon Health and Sciences University Portland OR USA

We investigated the relationship between the intracranial pulse pressure (ICP/sub PP/) and the mean intracranial pressure (ICP/sub M/). In adult patients, several research groups have described a linear relationship between ICP/sub PP/ and ICP/sub M/ within the range of cerebral autoregulation. Current monitoring and therapy are mainly based on the mean ICP/sub M/, since it is believed that the ICP/sub M/ contains most of the information provided by the other pulse morphology metrics. In this paper we attempt to answer whether there is further information within the ICP morphology not explained by ICP/sub M/ that might be of prognostic significance. We screened ICP records of 42 patients admitted to the Pediatric Intensive Care Unit at doernbecher Children's Hospital for segments in which the ICP/sub M/ varied at least 5 mmHg during a 1-hour period. We found 54 segments in 9 different pediatric TBI patients (ages 0.2-17.8 years, mean=9.9 years). ICP/sub PP/ and ICP/sub M/ were calculated for each pulse using an automatic pressure detection algorithm. The coefficient of linear correlation r was > 0.70 in 43/54 segments (p < 0.001), which indicates that there exists a linear relationship between ICP/sub PP/ and ICP/sub M/. However, we found r > 0.90 only in 16/54 segments (p=NS) . This result and visual inspection of ICP/sub PP/ vs. ICP/sub M/ density plots suggest that ICP pulse pressure is not fully explained by the ICP M.

关键词： Cranial pressure Morphology Brain injuries Iterative closest point algorithm Pediatrics Patient monitoring Medical treatment Hospitals detection algorithms Inspection

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

decision-aid system for survivability of damaged conventional military submarines

引用

NAVAL ENGINEERS JOURNAL 2002年第4期114卷 21-30页

作者： Lee, d Lee, J Lee, KH DONGKON LEE has served as a research engineer in Korea Research Institute of Ships and Ocean Engineering(KRISO)/KORDI for 19 years. He obtained his Ph.D in naval architecture at Pusan National University Korea in 1995. His current research interests include artificial intelligence maritime safety damage survivability evacuation and computer simulation. He is a member of the American Society of Naval Engineers Society of Naval Architects of Korea Korea Information Science Society and Korea Intelligent Information System. JAEYONG LEE has served as an engineering duty officer a commander in Korea Naval Sea Systems Command for 20 years. He graduated from Korea Naval Academy in 1979 with a bachelor of science degree in electric engineering. He received a master of engineering degree in industrial engineering from Yeonse University in 1997 and a master of engineering degree in naval architecture from Chungnam National University in 2000. His current research interests include design and safety of submarine. KYUNG-HO LEE has served as a research engineer in Korea Research Institute of Ships and Ocean Engineering(KRISO)/KORDI for 11 years. He obtained his Ph.D in naval architecture at Seoul National University in 1998. His current research interests include artificial intelligence maritime safety and concurrent engineering. He is a member of the Society of Naval Architects of Korea

AEven small leakage in submarines can lead to serious consecutive damage, since they operate under high water pressure. Such leakage including damage to piping and the bull eventually result in human casualties and loss of expensive equipment as well as the loss of combat capabilities. In such cases, a decision-making system is necessary to respond immediately to the damage in order to maintain the safety or the survival of the submarine. So it is necessary to have an automatic system that can generate responses and give advice to the operator on bow to make decisions to maintain the survivability of the damaged vessel. In this paper a knowledge-based decision support system for submarine safety is developed. The domain knowledge is acquired from submarine design documents, design expertise, and interviews with operators. The knowledge consists of responses regarding damage of the pressure bull and piping systems. Expert elements are deduced to obtain the decision from the knowledge base, and the system makes recommendations on bow to cope with damage to the bull and piping and whether the submarine should stay in the sea or to surface. It is demonstrated that the developed system is well simulated to the real situation through sample applications.

关键词： Submarines

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：