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Backward erosion piping (BEP) is one of the major causes of seepage failures in levees. Seepage fields dictate the BEP behaviors and are influenced by the heterogeneity of soil properties. To investigate the effects of the heterogeneity on the seepage failures, we develop a numerical algorithm and conduct simulations to study BEP progressions in geologic media with spatially stochastic parameters. Specifically, the void ratio e, the hydraulic conductivity k, and the ratio of the particle contents r of the media are represented as the stochastic variables. They are characterized by means and variances, the spatial correlation structures, and the cross correlation between variables. Results of the simulations reveal that the heterogeneity accelerates the development of preferential flow paths, which profoundly increase the likelihood of seepage failures. To account for unknown heterogeneity, we define the probability of the seepage instability (PI) to evaluate the failure potential of a given site. Using Monte-Carlo simulation (MCS), we demonstrate that the PI value is significantly influenced by the mean and the variance of ln k and its spatial correlation scales. But the other parameters, such as means and variances of e and r, and their cross correlation, have minor impacts. Based on PI analyses, we introduce a risk rating system to classify the field into different regions according to risk levels. This rating system is useful for seepage failures prevention and assists decision making when BEP occurs.

"The Strengths and Limitations of Input-Output Analysis in Evaluating Fiscal Policy" by Bc. Lenka Liskova Abstract: The thesis addresses the recent debates on suitable macroeconomic policy and calls for an alternative evaluation and forecasting method of economic impact, by assessing the applicability of Leontief's input- output model. We concentrate on providing an insight into the entire process of input-output analysis, which yields computation of simple input-output multipliers - output, gross value added and income multi- pliers. Thanks to the ability to capture linkages in the economy, com- puted multipliers are used as a tool to evaluate the effects of vehicle scrappage schemes and ICT infrastructure investment subsidies applied within a sample of diverse developed countries - Australia, Germany, Japan, UK and USA. We also aim to provide a sufficient explanation of the input-output model and a computation manual based on the example of the Leontief open model and calculation of simple multipli- ers. In our research, we numerically evaluate the effects of fiscal stim- ulus measures in the automobile industry and ICT sector and provide their comparison among 5 countries with different industry structures. Most importantly, the thesis provides a suggestion for policy makers to consider applying input-output...

by Kwok Chak Hung. / Thesis (M.Ph.)--Chinese University of Hong Kong

譚英隆 = Chinese input systems : a comparative study of Cantonese ... / Thesis (M.A.)--香港中文大學. / Manuscript. / Tan Yinglong = Chinese input systems : a comparative study of Cantonese ... / Thesis (M.A.)--Xianggang Zhong wen da xue. / 摘要 --- p.1 / Chapter 第一章 --- 問題背景 --- p.3 / 資訊處理的重要性 --- p.3 / 資訊處理在漢字社會所遇到的困難 --- p.5 / 香港中文資訊處理的需要 --- p.7 / 中文電腦在香港的使用現況 --- p.9 / 中文輸入法在香港的現況 --- p.10 / 普及漢字輸入法的重要性 --- p.13 / 本研究的內容和目的 --- p.15 / 本研究在教育上的意義 --- p.19 / Chapter 第二章 --- 文獻評述 --- p.22 / 電腦中文化 --- p.22 / 漢字的屬性 --- p.22 / 中文輸入法的兩大形式 --- p.24 / 中文鍵盤輸入法的類別 --- p.28 / 漢字輸入編碼的種類 --- p.31 / 字根編碼輸入 --- p.33 / 角形代碼輸入 --- p.36 / 筆劃編碼輸入 --- p.38 / 香港運科國際有限公司的基本筆劃編碼法 --- p.45 / 本研究的基本筆劃編碼法 --- p.47 / 拼音輸入法 --- p.49 / 廣東拼音輸入法 --- p.57 / 廣東拼音的注意符號 --- p.59 / 香港慣用的廣東注音符號 --- p.62 / 較近代的字書所採用的廣東注音符號 --- p.64 / 超群電腦公司廣東拼音輸入法所採用的注音符號 --- p.66 / 聲調的標注 --- p.68 / 中文輸入法的評估 --- p.70 / 1984年在上海進行的中文輸入編碼評測 --- p.72 / 資訊工業策進會1983年所作的評測 --- p.73 / 1985年台灣國立清華大學方聖平等人所作的評測 --- p.76 / 1987年台灣資訊工業策進會的測試 --- p.78 / 幾次主要評測的評述 --- p.81 / Chapter 第三章 --- 研究設計 --- p.86 / 簡述 --- p.86 / 受測試的中文輸入法 --- p.86 / 受試者 --- p.87 / 研究範圍 --- p.89 / 見字編碼和不見字編碼 --- p.92 / 教學和測驗進程 --- p.93 / 廣東拼音輸入法的教學 --- p.94 / 基本筆劃輸入法的教學 --- p.95 / 測量工具 --- p.96 / 測驗字的選取 --- p.98 / 資料分析 --- p.100 / Chapter 第四章 --- 結果及討論 --- p.108 / 三次測驗的總平均成績 --- p.108 / 總平均成績的進步情況 --- p.109 / 見字編碼測驗的平均成績 --- p.111 / 見字編碼部份的進步情況 --- p.112 / 聽字編碼測驗的平均成績 --- p.113 / 聽字編碼測驗的進步情況 --- p.115 / 輸入法與測驗法的關係 --- p.117 / 兩種輸入法學習難易的比較 --- p.118 / 錯誤類型統計 --- p.120 / 錯誤出現的頻率 --- p.121 / 廣東拼音輸入法最常見的錯誤 --- p.123 / 基本筆劃輸入法的取常見錯誤 --- p.131 / 從實驗結果比較兩種輸入法的學習歷程 --- p.136 / 已有知識的比較 --- p.137 / 其他知識對學習的干擾 --- p.138 / 記憶量的比較 --- p.143 / 規則難度的比較 --- p.145 / 規則變異的比較 --- p.151 / 從使用者的不同要求看兩種輸入法不同的特性 --- p.151 / 針對兩種輸入法特點的一些改良建議 --- p.153 / 見字輸入和聽字輸入 --- p.157 / 總結 --- p.158 / Chapter 第五章 --- 研究的限制 --- p.160 / 對機操作 --- p.160 / 完整的學習曲線 --- p.161 / 受試者 --- p.161 / 研究裡所採用的教學設計 --- p.162 / Chapter 圖一 --- 三次測驗的總成績 --- p.110 / Chapter 圖二 --- 三次見字編碼測驗的成績 --- p.113 / Chapter 圖三 --- 聽字編碼測驗的成績 --- p.116 / Chapter 圖四 --- 根據學習歷史和一般學習曲線的常態推斷的基本筆劃輸入法和廣東拚音 --- p.150 / Chapter 表一 --- 三次測驗的總平均成績 --- p.109 / Chapter 表二 --- 總平均成績的進步幅度 --- p.110 / Chapter 表三 --- 見字編碼測驗的成績 --- p.111 / Chapter 表四 --- 見字編碼測驗的進步幅度 --- p.113 / Chapter 表五 --- 聽字編碼測驗的成績 --- p.115 / Chapter 表六 --- 聽字編碼測驗的進步幅度 --- p.116 / Chapter 表七 --- 兩種輸入法在不同測驗法中的成績差異 --- p.117 / Chapter 表八 --- 廣東拚音輸入法最常見的二十種錯誤 --- p.123 / Chapter 表九 --- 引致各項錯誤的原因分析 --- p.129 / Chapter 表十 --- 基本筆劃輸入法最常見的二十種錯誤 --- p.131 / Chapter 表十一 --- 出現最多的二十種錯誤和它們所牽涉的錯誤類型 --- p.134 / 參考書目 / Chapter 附錄一 --- 基本筆劃輸入法教案 / Chapter 附錄二 --- 廣東拼音輸入法教案 / Chapter 附錄三 --- 測驗題目樣本 / Chapter 附錄四 --- 錯誤類型統計表

Yeung Kai-hau, Alan. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references. / ACKNOWLEDGMENTS --- p.iv / ABSTRACT --- p.v / Chapter CHAPTER 1 --- Introduction --- p.1 / Chapter 1.1 --- The Information Age --- p.2 / Chapter 1.2 --- The Importance of Input/Output --- p.3 / Chapter 1.3 --- Redundant Arrays of Inexpensive Disks --- p.5 / Chapter 1.4 --- Outline of the Thesis --- p.7 / References --- p.8 / Chapter CHAPTER 2 --- Selective Broadcast Data Distribution Systems --- p.10 / Chapter 2.1 --- Introduction --- p.11 / Chapter 2.2 --- The Distributed Architecture --- p.12 / Chapter 2.3 --- Mean Block Acquisition Delay for Uniform Request Distribution --- p.16 / Chapter 2.4 --- Mean Block Acquisition Delay for General Request Distributions --- p.21 / Chapter 2.5 --- Optimal Choice of Block Sizes --- p.24 / Chapter 2.6 --- Chapter Summary --- p.25 / References --- p.26 / Chapter CHAPTER 3 --- Dynamic Multiple Parity Disk Arrays --- p.28 / Chapter 3.1 --- Introduction --- p.29 / Chapter 3.2 --- DMP Disk Array --- p.31 / Chapter 3.3 --- Average Delay --- p.37 / Chapter 3.4 --- Maximum Throughput --- p.47 / Chapter 3.5 --- Simulation with Precise Disk Model --- p.53 / Chapter 3.6 --- Chapter Summary --- p.58 / References --- p.59 / Appendix --- p.61 / Chapter CHAPTER 4 --- Dynamic Parity Logging Disk Arrays --- p.69 / Chapter 4.1 --- Introduction --- p.70 / Chapter 4.2 --- DPL Disk Array Architecture --- p.73 / Chapter 4.3 --- DPL Disk Array Operation --- p.79 / Chapter 4.4 --- Performance of DPL Disk Array --- p.83 / Chapter 4.5 --- Chapter Summary --- p.91 / References --- p.92 / Appendix --- p.94 / Chapter CHAPTER 5 --- Performance Analysis of Mirrored Disk Array --- p.101 / Chapter 5.1 --- Introduction --- p.102 / Chapter 5.2 --- Queueing Model --- p.103 / Chapter 5.3 --- Delay Analysis --- p.104 / Chapter 5.4 --- Numerical Examples and Simulation Results --- p.108 / References --- p.109 / Chapter CHAPTER 6 --- State Reduction in the Exact Analysis of Fork/Join Queues --- p.110 / Chapter 6.1 --- Introduction --- p.111 / Chapter 6.2 --- State Reduction For Closed Fork/Join Queueing Systems --- p.113 / Chapter 6.3 --- Extension To Open Fork/Join Queueing Systems --- p.118 / Chapter 6.4 --- Chapter Summary --- p.122 / References --- p.123 / Chapter CHAPTER 7 --- Conclusion and Future Research --- p.124 / Chapter 7.1 --- Summary --- p.125 / Chapter 7.2 --- Future Researches --- p.126

Limitations imposed on control functions can significantly affect the performance of a linear controller. When applied to the real physical system, such limitations convert a linear function to a nonlinear input signal that alters the convergence or stability of the solution. The main focus of this study is to identify, classify and propose appropriate techniques to overcome such problems. In this regard, we propose an exact definition for a conditionally controllable problem and investigate control function formulations for such problems under the lenses of planning-based and optimization-based methods.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH / Bibliography: leaves 335-336. / by Lorris Mizrahi. / M.C.P.