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IEEE systems, Man and Cybernetics Society, Proceedings - 2005 International Conference on systems, Man and Cybernetics

作者： Shervais, Stephen Zwick, Martin Kramer, Patricia College of Business and Public Administration Eastern Washington University Cheney WA 99004 Systems Science Ph.D. Program Portland State University Portland OR 97207 Department of Neurology Oregon Health Science University Portland OR 97239

There are a number of human diseases that are caused by the epistatic Interaction of multiple genes. detecting these interactions with standard statistical tools is difficult, because there may be an interaction effect, but minimal or no main effect. Reconstructability analysis uses Shannon's information theory to detect relationships between variables in categorical datasets. We apply reconstructability analysis to data generated by five different models of gene-gene interaction, with heritability levels from 0.053 to 0.008, using 200 controls and 200 cases. We find that even with heritability levels as low as 0.008, and with the inclusion of 50 non-associated genes in the data-set, we can identify the interacting gene pairs with an accuracy of 80% or better. © 2005 IEEE.

关键词： Genes

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An agent-based model of trade with distance-based transaction cost

An agent-based model of trade with distance-based transactio...

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Summer Computer Simulation Conference 2006, SCSC 2006, Part of the 2006 Summer Simulation Multiconference, SummerSim 2006

作者： Venkat, Kumar Wakeland, Wayne W. Surya Technologies Inc. 4888 NW Bethany Blvd. Portland OR 97229 United States Systems Science Ph.D. Program Portland State University Portland OR 97207 United States

ISBN: (纸本)9781622763528

This paper describes an application of agent-based modeling to investigate the effect of a distance-based transaction cost on trade. Long-distance trade is rapidly increasing, but may ultimately be constrained by our ability to move material goods between sellers and buyers. Unlike information exchange, trade in material goods is dependent on the price of oil and vulnerable to future scarcities of oil. In addition, there are growing concerns about greenhouse gas emissions from long-distance transportation. Our purpose in this study is to take the first step in understanding the impact of a distance constraint on free global trade using a simple artificial economy. We use the perspective of agent-based computational economics to model two different scenarios of random initial allocations of goods among traders, and investigate the response of the economy as a distance-based transaction cost is applied. We show that a geographically skewed initial allocation of goods performs poorly, while a more uniform initial distribution responds in a highly resilient way as the transaction cost is varied. Underlying this resilience is the emergence of a stable trade network that has some of the properties of scale-free networks.

关键词： Commerce

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Corporate planning, forecasting, and the long wave

Corporate planning, forecasting, and the long wave

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Portland International Conference on Management of Engineering and Technology (PICMET)

作者： H.A. Linstone Systems Science Ph.D. Program Portland State University Portland OR USA

The author describes how his two decades of experience in corporate planning and three in professional journal editing suggest a correlation of technological innovation clusters, corporate planning and technological forecasting with the well-known 50 to 60 year-long wave cycles, i.e., the knowledge consolidation associated with the upswing phase and the creative destruction/knowledge innovation corresponding to the downswing phase of the 4/sup th/ long wave.

关键词： Technological innovation Technology forecasting Technology planning Space technology Evolution (biology) Power generation economics Economic forecasting Military computing Operations research Information technology

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Hamilton's rule applied to reciprocal altruism

Hamilton's rule applied to reciprocal altruism

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Congress on Evolutionary Computation

作者： J.A. Fletcher M. Zwick Systems Science Ph.D. Program Portland State University Portland OR USA

Reciprocal altruism and inclusive fitness are generally considered alternative mechanisms by which cooperative, altruistic traits may evolve. Here we demonstrate that very general versions of Hamilton's inclusive fitness rule (developed by Queller) can be applied to traditional reciprocal altruism models such as the iterated prisoner's dilemma. In this way we show that both mechanisms rely fundamentally on the same principle - the positive assortment of helping behaviors. We discuss barriers to this unified view, including phenotype/genotype differences and nonadditive fitness (or utility) functions that are typical of reciprocal altruism models. We then demonstrate how Queller's versions of Hamilton's rule remove these obstacles.

关键词： Equations Genetics Frequency Productivity Yarn Predictive models Costs

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Altruism, the prisoner's dilemma, and the components of selection

Altruism, the prisoner's dilemma, and the components of sele...

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IEEE International Conference on systems, Man and Cybernetics

作者： J.A. Fletcher M. Zwick Systems Science Ph.D. Program Portland State University Portland OR USA

The n-player prisoner's dilemma (Pd) is a useful model of multilevel selection for altruistic traits. It highlights the nonzero-sum interactions necessary for the evolution of altruism as well as the tension between individual and group-level selection. The parameters of the n-player Pd can be directly related to the equation due to Price (1970) as well as to a useful alternative selection decomposition. Finally, the n-player Pd emphasizes the expected equilibrium condition of mutual defection in the absence of higher levels of organization and selection.

关键词： Equations Evolution (biology) Biological systems Organisms Game theory Costs Psychology Ethics Computer simulation Marine animals

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Transforming technology management courses for Web delivery

Transforming technology management courses for Web delivery

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Portland International Conference on Management of Engineering and Technology (PICMET)

作者： W. Wakeland Systems Science Ph.D. Program Portland State University Portland OR USA

This paper is a reflection on the author's efforts for the past three years to use Web-based technology to improve a sequence of computer modeling and simulation courses by replacing lectures with self-paced reading materials and labs conducted in computer-equipped classrooms. Students work at their own pace on "labs" that are designed to reinforce key concepts in the readings. Learning is assessed via projects, examinations, and exercises that are written up and submitted by the students. Self-tests are also available to the students. The motivation behind these changes was primarily to improve course quality using active learning principles, and also to improve the efficiency of delivery.

关键词： Technology management Built-in self-test Vehicles Computational modeling Computer simulation Conducting materials Content management Terminology Streaming media

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An Accurate Estimate of Effective Thermal-Mechanical Properties of Coreless Circuit Substrate for Advanced Packaging

An Accurate Estimate of Effective Thermal-Mechanical Propert...

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International Conference on Electronics Packaging (ICEP)

作者： W. Y. Jhu H. C. Cheng Department of Aerospace and Systems Engineering Feng Chia University Taichung Taiwan Ph.D Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung Taiwan

This study aims to give an accurate estimate of the effective thermal-mechanical properties of a coreless circuit substrate for advanced IC packages. To achieve the goal, a subdomain-based effective method is proposed, incorporating a sub-domain three-dimensional (3d) copper trace mapping and modeling (TMM) method, a volume-averaging rule of mixture (ROM) technique and finite element modeling. Furthermore, the proposed effective method is combined with an FEA-based process simulation framework to investigate the process-induced warpage of a flip-chip chip scale package during fabrication. At last, parametric analysis is performed to identify the crucial factors influencing the process-induced warpage of the package.

关键词： Solid modeling Three-dimensional displays Predictive models Packaging Electronic packaging thermal management Finite element analysis Flip-chip devices

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INTEGRATING SENTINEL-1 SYNTHETIC APERTURE RAdAR ANd CHIRPS dATA FOR UNdERSTANdING HEAVY PRECIPITATION ANd FLOOdING IN AN GIANG PROVINCE, VIET NAM 44

INTEGRATING SENTINEL-1 SYNTHETIC APERTURE RADAR AND CHIRPS D...

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44th Asian Conference on Remote Sensing, ACRS 2023

作者： Minh, Ton Binh Chiang, Shou-Hao International Ph.D Program in Environmental Science and Technology University System of Taiwan No. 300 Zhongda Rd. Zhongli District Taoyuan City32001 Taiwan Center for Space and Remote Sensing Research National Central University No. 300 Zhongda Rd. Zhongli District Taoyuan City32001 Taiwan

ISBN: (纸本)9781713893646

Understanding the mechanisms of heavy precipitation and flooding is essential for effective climate change adaptation and response. The cloud-penetrating ability of microwaves makes Synthetic Aperture Radar (SAR) an ideal tool for providing weather-independent images for flood mapping. Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) is a land-only rainfall dataset that incorporates 0.05° resolution satellite imagery with in-situ station data to create gridded rainfall time series for various analysis applications. This study employs intensity images from Sentinel-1 satellites to generate flood maps and utilizes CHIRPS to derive heavy rainfall frequency. The segmentation technique is applied to distinguish between pre-existing standing water, recently flooded areas, and non-flooded regions within the study area. By combining SAR and CHIRPS data, this research yields valuable insights into the relationship between heavy rainfall and flood occurrences in An Giang province, Viet Nam. The escalating frequency of heavy precipitation correlates with an augmentation in local rainfall amounts, and a positive correlation emerges between heavy rainfall and the extension of flood-prone areas. While recognizing that flooding influences water flow from the upstream of the Mekong River, flooding discharges from neighboring areas, and tidal levels, the accelerated trend of urbanization has also played a significant role. The expansion of impervious surfaces contributes to the severity of deep floods and elevates flood potential in the region. Furthermore, this research affirms the effectiveness of SAR intensity image mapping for flood detection, and the integration of SAR and CHIRPS data furthers our understanding of heavy precipitation mechanisms. As the implications of climate change persist, the findings are crucial for developing sustainable flood management strategies, as well as enhancing resilience to climate-induced challenges in the Mekong River del

关键词： CHIRPS climate change Flood Mekong River delta Sentinel-1

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deep Learning-Based Positioning Error Fault diagnosis of Wire Bonding Equipment and an Empirical Study for IC Packaging

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IEEE Transactions on Semiconductor Manufacturing 2023年第4期36卷 619-628页

作者： Kao, Sheng-Xiang Chien, Chen-Fu International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu30013 Taiwan Intelligent Manufacturing and Circular Economy Research Center National Tsing Hua University Artificial Intelligence for Intelligent Manufacturing Systems Research Center National Science and Technology Council Department of Industrial Engineering and Engineering Management Hsinchu300044 Taiwan

Little research has been done for artificial intelligence applications of semiconductor backend. This study aims to develop a deep learning based fault diagnosis framework as prognostics and health management (phM) solutions with a comprehensive analytics process. A linear encoder sensor is employed to measure position, while data preparation is conducted to convert position information into a signal. Then, signal processing is used to extract the features, in which high pass filter is applied to normalize the signal and emphasize the features. High-dimensional features including time domain statistical features, time-frequency domain features obtained by continuous wavelet transform (CWT), and frequency domain features converted by fast Fourier transform (FFT) are extracted to prepare the dataset. An ensemble neural network model that integrates deep neural network (dNN) and convolutional neural network (CNN) is employed to recognize the pattern and diagnose the positioning errors. The accuracy and false alarm rate are considered to support maintenance decisions. An empirical study was conducted in a world leading IC assembly and testing company for validation. The results have shown that the proposed approach can effectively detect inappropriate installation of the bond head in wire bonding equipment for predictive maintenance and cost reduction. © 1988-2012 IEEE.

关键词： Failure analysis

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A comparison of system dynamics and agent-based simulation applied to the study of cellular receptor dynamics

A comparison of system dynamics and agent-based simulation a...

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The Hawaii International Conference on System sciences, HICSS 2004

作者： Wakeland, Wayne W. Macovsky, Louis M. Gallaher, Edward J. Aktipis, C. Athena Systems Science Ph.D. Program Portland State University United States Dynamic BioSystems LLC Behav. Neurosci. Pharmacol./P. Oregon Health and Science University United States Department of Psychology University of Pennsylvania United States

Cellular receptor dynamics are often analyzed using differential equations, making system dynamics (Sd) a candidate methodology. In some cases it may be useful to model the phenomena at the biomolecular level, especially when concentrations and reaction probabilities are low and might lead to unexpected behavior modes. In such cases, agent-based simulation (ABS) may be useful. We show the application of both Sd and ABS to simulate non-equilibrium ligand-receptor dynamics over a broad range of concentrations, where the probability of interaction varies from low to very low. Both approaches offer much to the researcher and are complementary. We did not find a clear demarcation indicating when one paradigm or the other would be strongly preferred, although Sd is an obvious choice when studying systems at a high level of aggregation and abstraction, and ABS is well suited to studying phenomena at the level of individual receptors and molecules.

关键词： systems analysis

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