Thesis. 1976. M.ArchAS--Massachusetts Institute of Technology. Dept. of Architecture. / Microfiche copy available in Archives and Rotch. / Bibliography: leaves 94-97. / M.ArchAS

Advances in semiconductor technology and design automation methods have introduced a new era for electronic products. With design sizes in millions of logic gates and operating frequencies in GHz, defects-per-million rates continue to increase, and defects are manifesting themselves in subtle ways. / Diagnosing functional failures in complicated electronic boards is a challenging task, wherein debug technicians try to identify defective components by analyzing some syndromes obtained from the application of diagnostic tests. The diagnosis effectiveness and efficiency rely heavily on the quality of the in-house developed diagnostic tests and the debug technicians’ knowledge and experience, which, however, have no guarantees nowadays. To tackle this problem, this thesis proposes a novel agent-assisted diagnostic framework for board-level functional failures, namely AgentDiag, which facilitates to evaluate the quality of the diagnostic tests and bridge the knowledge gap between the diagnostic programmers who write diagnostic tests and the debug technicians who conduct in-field diagnosis with a lightweight model of the boards and tests. / Machine learning algorithms have been advocated for automated diagnosis of board-level functional failures due to the extreme complexity of the problem. Such reasoning-based solutions, however, remain ineffective at the early stage of the product cycle, simply because there are insufficient historical data for training the diagnostic system that has a large number of test syndromes. Guided by a proposed metric isolation capability, AgentDiag is able to leverage the knowledge from the lightweight model to selecting a reduced test syndrome set for diagnosis in an adaptive manner. / While AgentDiag is effective to improve the diagnostic accuracy, this technique, by excluding some test syndromes, may cause information loss for diagnosis. The thesis further presents a novel test syndrome merging methodology to address this problem. That is, by leveraging the domain knowledge of the diagnostic tests and the board structural information, we adaptively reduce the feature size of the diagnostic system by selectively merging test syndromes such that it can effectively utilize the available training cases. / Experimental results on real industrial boards and an OpenRISC design demonstrate the effectiveness of the proposed solutions. / 半導體技術和設計自動化的高速發展開啟了電子產品的新紀元。百萬級別的設計尺寸和上G赫茲的操作頻率使得每百萬次採樣數的缺陷率繼續上升，缺陷顯現方式也日益微妙。 / 複雜電子板的診斷是一項極具挑戰的工作。調試人員通常通過分析診斷測試所產生的症狀，甄別有缺陷的元件。診斷的有效性和效率就極大地依賴於診斷測試的質量和調試人員的知識經驗，但是現在這些都是沒有確定性的。為了解決這一問題，本文提出一個新穎的針對板級功能性故障的代理輔助診斷系統AgentDiag。它幫助評估診斷測試的質量，並架起編寫診斷測試的測試程式員和從事實際診斷工作的調試人員之間的橋樑。 / 因為板級診斷的極度複雜，機器學習算法已經被提出來解決這一問題。但是這些基於推導的方法在早期很難達到好的效果，原因是過大的測試數量和相對較少的訓練數據。在度量Isolation Capability的引導下，能夠適應性地利用來自輕量級模型的知識去選取一個症狀集進行診斷。 / AgentDiag可以有效地提高診斷準確率，但是由於是直接剔除一部分測試症狀，所以有可能造成信息的丟失。本文進一步提出了一個測試症狀合併的方法來解決這一問題。那就是利用診斷測試和電路板的結構描述，我們可以適應性地利用選擇性合併的測試症狀來減少測試症狀的數目，從而有效地利用已有的測試數據。 / 來自實際的工業電路板和OpenRisc設計的實驗數據驗證了提出的方法的有效性。 / Sun, Zelong. / Thesis M.Phil. Chinese University of Hong Kong 2014. / Includes bibliographical references (leaves 47-51). / Abstracts also in Chinese. / Title from PDF title page (viewed on 12, October, 2016). / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only. / Detailed summary in vernacular field only.

"June 27, 2004" / Includes bibliographical references (leaves 180-195) / xiii, 195 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Architecture, Landscape Architecture and Urban Design, 2004

Typescript (photocopy)

A simulation and decision-support software product for aquaculture facility design and management planning is described (AquaFarm, Oregon State University��), including comprehensive documentation and applications to practical problems. AquaFarm provides (1) simulation of physical, chemical, and biological unit processes, (2) simulation of facility and fish culture management, (3) compilation of facility resource and enterprise budgets, and (4) a graphical user interface and data management capabilities. These analytical tools are combined into an interactive, decision support system, for the analysis and development of facility design specifications and management strategies. Intended user groups include aquaculture research, engineering, education, and production. As guided by the user, aquaculture facilities can be of any type, configuration, and management objectives, for purposes of broodfish maturation, egg incubation, and/or growout of finfish or crustaceans in cage, single pass, serial reuse, water recirculation, or solar-algae pond systems. User-accessible specifications include (1) site climate and water supplies, (2) components and configurations offish culture systems, (3) fish and facility management strategies, (4) unit costs for budget items, (5) production objectives (species, time schedules, and fish numbers and weights), and (6) parameters of unit-process and fish performance models. Based on these specifications, aquaculture facilities are simulated, resource requirements are compiled, and operation schedules are determined so that production objectives are achieved. Facility performance is reported to the user as management schedules, summary reports, resource and graphical compilations of time-series data for unit process, fish, and water quality variables. If unsatisfactory resource requirements or unattainable production objectives are found, procedures of iterative design and management refinement are supported. To provide this analytical capacity, a wide range of existing and newly developed, quantitative methods and models are assembled and synthesized into an integrated analytical framework, including aquatic chemistry, aquatic biology, fish biology, aquacultural engineering, and simulation techniques. Unit-process and system-level validation exercises are demonstrated for a wide range of aquaculture facilities, in which (1) facilities are constructed according to reported studies, (2) simulation trials are accomplished, and (3) good agreement between predicted performance and empirical observations is demonstrated, given that sufficient specification of site-specific variables is provided. / Graduation date: 2000

published_or_final_version / Architecture / Doctoral / Doctor of Philosophy

published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy

An algorithm which adopts a moving cone approach but is guided by maximal network flow principles is developed. This study argues that from a network flow point of view, the re-allocation problem is a major obstacle to prevent a simulation oriented pit design algorithm from reaching the optimum solution. A simulation oriented pit design algorithm can not resolve the re-allocation problem entirely without explicit definition of predecessors and successors. In order to preserve the advantages of moving cone algorithm and to improve the moving cone algorithm, the new algorithm trys to avoid the re-allocation situations. Theoretical proof indicates that the new algorithm can consistently generate higher profit than the popular moving cone algorithm. A case study indicates that the new algorithm improved over the moving cone algorithm (1% more profit). Also, the difference between the new algorithm and the rigorous Lerchs-Grossmann algorithm in terms of generated profit is very insignificant (0.015% less). The new algorithm is only 2.08 times slower than the extremely fast moving cone algorithm. This study also presents a multi-period 0-1 programming mine sequencing model. Once pushbacks are generated and the materials between a series of cutoffs are available for each bench of every pushback, the model can quickly answer, period by period, what is the best (maximum or minimum) that can be expected on any one of these four items: mineral contents, ore tonnages, waste tonnages and stripping ratios. This answer is based on a selected cutoff and considers the production capacity defined by the ore tonnage, the desired stripping ratio and the precedence constraints among benches and pushbacks. The maximization of mineral contents is suggested to be the direct mine sequencing objective when it is permissible. Suggestions also are provided on how to reduce the number of decision variables and how to reduce the number of precedence constraints. A case study reveals that the model is fast and operational. The maximization of mineral contents increases the average grades in early planning periods.

published_or_final_version / Architecture / Master / Master of Architecture

No description available.