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1
胡潔如. "情緖輔導課程對少年感化院院童理性思考和情緖穩定之效果研究." Thesis, University of Macau, 2000. http://umaclib3.umac.mo/record=b1636517.
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Chen, Cu-wei, and 陳谷瑋. "多類別AdaBoost穩健性研究." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/18166604708630652149.
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LIN, MING-ZHE, and 林銘哲. "累進式直流伺服穩健性控制." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/03542362194993095211.
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黃雅琪. "時間序列迴歸參數之穩健估計." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/93209267146464120421.
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Lin, Ya-Ting, and 林雅婷. "測量網之三維穩健度分析研究." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/10762637997922443465.
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WANG, XIANG-BAO, and 王祥保. "PWR核電廠穩健性控制系統設計." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/14688781958130312922.
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Chen, I.-Lin, and 陳以林. "投資機會、會計穩健性與投資效率." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/72092768766277959817.
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碩士輔仁大學
會計學系碩士班
99
Balance sheet conservatism and conditional conservatism are two primary earnings attributes(Francis 2004; Watts 2003a, 2003b), and previous studies suggests that conditional conservatism could enhance investment efficiency by curbing over-investment and mitigating under-investment(Lara et al. 2009; Bushman et al. 2006). In this study, I extend related studies by exploring whether the effect of conditional conservatism on investment efficiency depends on the level of balance sheet conservatism. I expect that for firms without investment opportunities, when balance sheet conservatism is low, the likelihood of future recognizing economic losses is higher; therefore, the effect of conditional conservatism on curbing over-investment is more prominent. For firms with abundant investment opportunities, when balance sheet conservatism is low, the likelihood of future recognizing economic losses is higher; therefore, the effect of conditional conservatism on mitigating under-investment is more prominent. The sample consists of observations selected from listed and over-the-counter companies in Taiwan from 1996 to 2007. The main findings are summarized as follows. First, for firms without investment opportunities, the likelihood of over-investment decreases as conditional conservatism increases. Besides, relative to firms with high balance sheet conservatism, the likelihood of over-investment decreases more as conditional conservatism increases for firms with low balance sheet conservatism. Second, for firms with abundant investment opportunities, the likelihood of under-investment decreases as conditional conservatism increases. However, relative to firms with high balance sheet conservatism, the effect of conditional conservatism on mitigating under-investment for firms with low balance sheet conservatism is not supported by the evidence. To sum up, this study provides evidence that balance sheet conservatism would influence the effect of conditional conservatism on enhancing investment efficiency. The findings of study show that it would be necessary to take the role of balance sheet conservatism into consideration for future study in the effect of conditional conservatism on enhancing investment efficiency.
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方國富. "多品質特性產品之穩健參數設計." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/12068306125489117990.
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ZHANG, JIE-REN, and 張介仁. "沸水式反應器穩健性功率控制器." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/06010033812662384356.
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CHIEH, KU CHUN, and 古俊傑. "微飛行器強健穩定與導航之研究." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/52425224332389980480.
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碩士國防大學中正理工學院
兵器系統工程研究所
93
The objectives of this study are to explore the possibility of flight stability, navigation and guidance control technique of a whole-wing micro air vehicle(MAV). Since Autonomous flight of MAV’s plays a crucial role for implementing reconnaissance missions in unknown environment, advanced navigation and control technique are required. However, for its small size and low speed, MAV’s low Reynolds number flight leads itself to a situation of high sensitivity to the turbulence and low aerodynamic damping. Due to its size scale, it is difficult to control its flight and to distinguish its flight attitude and trajectory. Thus, the enhancement of the flight stability as well as navigation and guidance performance is desired. In this thesis, a nonlinear dynamical model for three-dimensioned motion of MAV’s was first constructed. The research will consider longitudinal and lateral stability, navigation and guidance of a whole-wing MAV. The components and payloads of the MAV not only include servos, a receiver and batteries, but also a CCD and an A/C transmitter. Then, linear time varint and invariant models were derived by applying small perturbation theory and linearizing around an equilibrium operating condition. Based on linearized dynamical model of the MAV, a classical PID controller, a LQR and four suboptimal controllers was designed to enhance the flight stability and the capability of navigation and guidance for improving the flying qualities of the MAV. In the navigation system of the MAV, a vision-based recognition system was constructed to obtain the flight attitudes of the MAV and cross-product guidance law was applied to accomplish the mid-course navigation along desired flight trajectory. Numerous simulations of liner and nonlinear model with feedback control were performed over a wide range of operating condition to evaluate the capability of these flight and navigation systems. This research results show that the flight stability is enhanced and the goal of designing navigation and guidance system is achieved.
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CHEN, CHUN-FEI, and 陳春妃. "時間序列模型穩健性估計之研究." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/35037499408299950113.
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shao-chieh, kuo, and 高紹傑. "微飛行器之強健穩定與控制研究." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/05059181842182579716.
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碩士國防大學中正理工學院
兵器系統工程研究所
91
Recently, The way to reduce casualties of our soldiers is an important goal for each country on a battlefield with high technology. Expect for increasing the protection, how to find and destroy the enemy at the first time is an important factor, so beyond a reconnaissance with man or UAV, Micro Aerial Vehicle is good equipment for small-scale troops to explore and get the information of the enemy. However, due to the small size and worse aerodynamic, it doesn’t performance very well on the stability. Therefore, we need to improve the properties of controllability if it is supposed to generally troop. In this research, we build the equations of non-linear six-Dimension of fly and take the robust control for primary control law to compare with PD and LQR control laws, and simulate the dynamic response in non-linear and linear system to show that the robust control has better efficiency than the others two laws in tolerance of variations of system and restraining the disturbance.
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游世吉. "強健性扇形區域穩定範圍之比較." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/52576947278310697627.
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GOU, HONG-YING, and 郭虹纓. "非常態製程能力指標之穩健性評估." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/83390687185725311564.
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Yen, Pei-Chun, and 顏培俊. "資本資產定價模型之穩健估計分析." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65413198663802284117.
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Chen, Jyh-Chang, and 陳志昌. "穩健性多元估計量之子樣本計算法." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/97023063524559022667.
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ZHENG, ZHEN-FA, and 鄭振發. "大型系統的強健性及分散穩定控制." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/37140976717973411763.
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楊錫卿. "數位系統之強健穩定性分析與設計." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/73814342916382502797.
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碩士國立中央大學
機械工程研究所
76
In this thesis, we first consider the stability of discrete multivariable systems subject to nonlinear time-varying model uncertainties. Based on the Lyapunov approach, stability robustness criteria are derived. Bymeans of a simple method to adjust the pole locations of the nominal closed-loop system, a design procedure for robust control is provided. The sturation possibility of the designed controllers is reduced using the porposed new control configuration. For linear time-varying perturbations, state transformatioin is proposed to improve bounds on structured perturbations as well as in unstructured perturbations. The allowable bounds for eigenvalue assignment inside a circular region are also provided for the linear time-invariant systems.
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Guo, Hong Ying, and 郭虹纓. "非常態製程能力指標之穩健性評估." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/80882482454591162877.
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LI, MEI-LING, and 李美玲. "複合常態分配中母體均數之穩健估計." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/23269793804725440528.
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XU, ZHANG-JIA, and 徐章家. "蒸汽產生器穩健性飼水控制系統設計." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/98319399458261813352.
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LIN, JIN-YU, and 林錦瑜. "二元配置中變異成分的穩健估計及測試." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/01112359720239212321.
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欉清全. "非恆定資料下統計推論之穩健性與改善." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/82035930652626970709.
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博士國立政治大學
國際貿易學系
88
This dissertation analyses asymptotic properties of test statistics when the data generating process is nonstationary.And proposes a test procedure to improve size distortions of the tests.This dissertation includes three articles. The first article invesigates the asymptotic properties of the Phillips-Perron tests and some of their variants when the error is MA with coefficient close to -1.Asymptotic distributions of the tests described above constructed by IV and OLS estimators diverge with rates of square root of T and T,respectively. So,the sizes of "IV-type" Phillips-Perron tests are better than those of "OLS-type".And increase sample size can not resolve the size problems. Meanwhile,I propose modified Phillips-Perron tests based on IV estimator.In large samples,the modified tests have robust size.Simulations reveal that when mdified tests are bootstrapped, their sizes are very close to the nominal size even in small samples. The second article uses localized parameteralizations to invesigate large sample properties of stationary tests when the DGP is AR.Asymptotic distributions explain why stationary tests would reject null hypothesis too often when AR root is close to unit.Finally,I discuss the possibility of improving size distrotion by bootstrap. The last article investigates the asymptotic property of the test proposed by Kuo (1998).When intercept is I(1), the distribution of the above test is different from that of Kuo (1998). This distribution not only explains the simulation results of Kuo which reveal serious size distrotions of the test but also can infer the size pattern simultaneously.
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Ke, Ray-Fen, and 柯瑞芬. "多重品質特性之產品穩健設計決策模式." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/86138096760634134992.
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Ludiansari, Mughniyah, and 陸滿擴. "於推進工法之施工規劃上應用穩健設計." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/6c3562.
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碩士國立臺灣科技大學
營建工程系
99
Microtunneling is one of the trenchless technologies available for underground pipeline installation or rehabilitation. Uncertainty in the existing soil conditions poses a potential risk for all trenchless tunneling projects. Compared with open-cut methods, trenchless methods require significantly more detail and accurate geotechnical data inside the construction area before any construction is estimated or commenced. This research is try to integrate two previous researches that have been proposed to handling uncertainty in geological condition and also machine performance, to get an optimum range of thrust index by minimizing its deviation using Robust Design Optimization. Robust Design Optimization is one method that available to find optimum thrust range to be adjusted in jacking process, by minimizing variance of the range. Optimum range is needed to result low deviation of rate of penetration so the machine is more stable as expected. When construction process is more stable, possibilities of construction failure can be reduced. The most robust value indicated by smallest sigma that resulted from each threshold’s distribution. The cost estimation also conducted in this thesis to show trade-off of application in robust design. Geological parameter and machine productivity parameter that involve in this research were following two previous researches. As the result, optimum thrust index range and its cost estimation will be provided. The result shows that by using Robust Design Optimization, stability of machine productivity can be reached even it have higher expected value than other methods.
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Ye, Jia Fan, and 葉嘉范. "多變數控制系統穩定強健度分析與設計." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/12892729151190869053.
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ZHOU, KUN-LI, and 周昆立. "廣義羅吉斯分配之母體平均數的穩健估計." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/54503798356308321421.
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Fu, Qun Chao, and 傅群超. "非線性控制系統之強健穩定性分析與設計." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/96443235571841513460.
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Huang, Yen-Shan, and 黃衍善. "穩健閉迴路供應鏈中的需求導向拆解規劃." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/27257168432932381159.
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碩士國立清華大學
工業工程與工程管理學系
99
現今隨著政府環境法規的要求以及消費者環境意識的興起，產品製造商必須負起將產品回收的責任。閉迴路供應鏈系統是在此議題下的一個值得採用的策略。它整合了正向及逆向物流，藉由回收再利用，保留可再使用的資源，並且延長產品的生命週期。在本論文中，我們針對一個閉迴路供應鏈系統提出一個求解需求導向拆解規劃問題的混整數規劃模型，同時考慮多期、多產品、以及產品的階層結構。模型的目的是決定從最終使用者手中各種壽終產品的回收時間及數量。回收產品進而被拆解以做為再使用、再製造、維修、與丟棄等再利用方式。同時，模型也決定這些回收產品的最佳拆解及再利用策略，且滿足產能與產品需求的限制。此外，本論文所提出的模型考量了在閉迴路環境中的一些市場機制，例如回收產品時間、品質、及數量的議題。經過數據測試讓模型獲得驗證，且所提供的結果具有效性，提供決策者足夠的資訊。 然而，由於在本研究所提出的閉迴路架構中，產品需求、回收產品品質、以及回收時間存在著許多不確定性，因此我們進行一系列的情境分析來確認這些不確定性因素的敏感度以及它們對於最佳策略的影響。而結果顯示，其中所有的參數皆顯著地改變了決策。因此，為了減緩不確定性造成的決策困難，本論文一開始即考慮可能的未來情境，在決策者對於風險的偏好態度下，以二階段穩健規劃方法來決定一個最適當的穩健決策。第一階段目的在於找出一個折衷的決策，以期能夠在所有情境中接近最佳解，同時允許一定程度的不可行性，例如需求的不滿足。而當情境確定發生的當下，決策者選用適合此情境的第二階段決策，並成為一個緩衝機制以吸收或減低不確定性所造成的影響。另外，測試結果也顯現出解穩健性與模型穩健性中的權衡關係。最後，當超額採購與緊急採購允許的情況下，本論文提供了一延伸的模型以求解應變計畫下的穩健決策，其利潤也獲得了改進。
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曾騰樟. "戰機飛控系統之輔助強健穩定與控制研究." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/34504808151796914887.
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碩士中正理工學院
兵器系統工程研究所
88
Abstract An auxiliary robust control (ARC) scheme is proposed for optimal control systems with plant parameter variations and uncertainties. Stability and sensitive issues of the ARC scheme are investigated as well. Based on small gain theorem, stability criterion is developed while robust performance is discussed by using the sensitivity function. Moreover, an extended control scheme constructed by auxiliary robust control with reference models (ARCm) is proposed to overcome the intrinsic complexity and instability of high-order systems and unstable plants. Optimal control systems are, in general, designed based on the idealized nominal systems. The performance of the optimal controllers is deteriorated drastically when system parameters vary due to changes of operating conditions and system uncertainties. In this paper, the concept of ARC is applied to optimal control systems. The controller in the ARC scheme consists of two parts, the optimal part and an auxiliary part. The optimal part is designed to control the idealized nominal systems. On the other hand, the auxiliary part is developed to cope with the uncertainties of the system dynamics and the changes of operating condition. As examples, ARC control schemes are designed for optimal control systems of a parcel packing system and a concentration control system for fertilizer production. Finally, to show the performance of ARCm control scheme, an inverted pendulum and the AFTI/F16 pitch control system are tested using the control scheme under ITAE criterion. A series of simulations are performed over a wide range of operating conditions to demonstrate the merit of the ARC and ARCm control schemes with plant parameter variations and model uncertainties. The influence of unexpected external disturbances such as gust is evaluated as well. The results show that the robustness is successfully increased. Substantial improvement is observed by comparing with the results with only traditional optimal controller.
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CHEN, QING-SHAO, and 陳慶紹. "大型延遲系統的穩定估測及強健分析與設計." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/36463669206849561360.
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DAI, YUAN-REN, and 戴元任. "利用H最佳化及強健穩定理論設計最佳控制器." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/94926080669418339758.
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LIU, BING-LIN, and 劉柄麟. "不定性時延係統之時嚴相關強健性穩定度研究." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/2knas7.
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Dai, Yuan-Ren, and 戴元任. "利用H∞最佳化及強健穩定理論設計最佳控制器." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/41716452018758363350.
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Huang, Wei-Ting, and 黃煒婷. "財務危機、會計穩健性與公司治理-來自中國之實證." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16247859833003467385.
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Lung, Yu Wei, and 余威龍. "質子交換膜燃料電池性能之穩健參數設計與分析." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/30113339473957229842.
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博士國防大學中正理工學院
國防科學研究所
97
The dissertation aims at investigating the performance of proton exchange membrane fuel cell (PEMFC) by robust parameter design (RPD) for ensuring lower variance and optimum of electric power. There are numerous operating parameters affecting the PEMFC operating performance, such as fuel cell operating temperature, anode and cathode humidification temperature, operating pressure and reactant flow rate. This study adopted a fractional factorial design of the design of experiments (DOE) with Taguchi method to screen first whether these factors have significant effects on a response and the interactions between various parameters. The orthogonal array of the Taguchi method is then utilized to determine efficiently the optimal combination of factors for a fuel cell. This dissertation also presents an integrated approach that combines the Taguchi method with neural networks to prevent discrete parameter levels in the Taguchi method from the estimation of the real optimum. The Taguchi method including the statical and the dynamic characteristics first acquires the primary optimums of the operating parameters in the PEMFC. Each treatment in a row of the orthogonal array together with its relative responses was used to establish a set of training patterns (input/target pair) to the neural network. The neural network can then construct relations between the control factors and responses in the PEMFC. The actual optimums of the operating parameters in the PEMFC were obtained by the trained neural network. Experimental results are presented for identifying the proposed approach. In the experiment, a single PEMFC (1-cell PEMFC) and a collection of three PEM fuel cells in series (3-cell stack) are adopted for experiments. The analyses by the results of the experiments reveal that the operating temperature, the operating pressure and the interaction between operating temperature and operating pressure have a significant effect on the fuel cell performance for the 1-cell and the 3-cell stack. In addition, the cathode humidification temperature has also a significant effect on the 3-cell stack. While both the operating temperature and pressure increase simultaneously with that, the other factors are at appropriate conditions, it is possible to improve the performance of PEMFC.
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李寶童. "非常態分配與變異數不等下比較均數之穩健方法." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/23431349161841445083.
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許懿允. "交談式多目標規劃求解多品質特性之產品穩健設計." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/55349797783328505307.
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Cheng, Chun-kai, and 鄭駿凱. "基於均勻設計法之CNC銑床的穩健最佳加工參數研究." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/30952493874826432555.
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碩士國立高雄第一科技大學
電機工程研究所碩士班
104
Recently, computerized numerical control (CNC) drilling plays an important role in aerospace component manufacturing processes. However, the machining parameters are usually selected prior to machining according to standards or user’s experience. In addition, the useful life of a cutting tool largely controls the economics of the machining operations. Hence, estimation of the tool wear of drilling tools can help decide about possible optimization of the process parameters or replacing the worn out tool with a fresh tool. The objective of this study is to optimize the process parameters of CNC vertical drilling such as spindle speed, and feed rate on minimizing cycle time and tool wear. The machining efficiency and cost saving rate are strongly affected by cycle time and the tool wear. In order to achieve the optimization, it is necessary to construct relationships between the output responses and process parameters of interest. Uniform design (UD) is used to construct a small set of drilling experiments by using uniformity measure, such that the experiments are uniformly scattered. That is, the experiment number is significantly decreased and it is especially suitable for cost-effective experiments with many experimental variables. Regression analysis (RA), back propagation artificial neural network (BP) and particle swarm optimization-based back propagation artificial neural network (PSO-BP) are used to evaluate the relationships between inputs and outputs, and optimize the process parameters of aerospace component for CNC vertical drilling. Experimental results confirm the excellent performance of PSO-BP by comparing with those obtained by RA and BP in modeling and optimizing the CNC vertical drilling.
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陳秋如. "盈餘穩健性、市價對淨值比與外資法人持股之關聯性." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/18487993202602514261.
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碩士國立政治大學
會計研究所
94
Prior empirical studies indicate that researchers have to control for the level of beginning-of-period earnings conservatism when discussing earnings conservatism in the current period. The negative association between beginning-of-period earnings conservatism and earnings conservatism in the current period will dilute the effect of our explanation of earnings conservatism in the current period. Using beginning-of-period price-to-book ratios to proxy for beginning-of-period earnings conservatism, this study examines earnings conservatism in Taiwan during the period from 1999 to 2004, and discusses the relationship between earnings conservatism and shareholding ratios of foreign institutional investors. The definition of earnings conservatism is based on Basu(1997). The empirical results show that earnings in Taiwan demonstrate the characteristic of earnings conservatism in recent years, and that beginning-of-period price-to-book ratios are negatively associated with the level of earnings conservatism. As for the analysis of the link between shareholding ratios of foreign institutional investors and earnings conservatism, this study fails to find the evidence that shareholding ratios of foreign institutional investors have significant impacts on earnings conservatism after controlling for the level of beginning-of-period price-to-book ratios. However, in the portfolio of the highest beginning-of-period price-to-book ratios, there is a positive relationship between earnings conservatism and shareholding ratios of foreign institutional investors in the next period. This result means that firms with the highest level of beginning-of-period earnings conservatism will have higher shareholding ratios of foreign institutional investors in the next period if their earnings in the current period are relatively more conservative. However, when this study uses the instrumental variable to measure shareholding ratios of foreign institutional investors, shareholding ratios of foreign institutional investors, whether in the current or next period, do not have a significant relationship with the level of earnings conservatism. In summary, using data from 1999 to 2004, this study finds that there is significantly negative association between beginning-of-period earnings conservatism and earnings conservatism in the current period, and that earnings in Taiwan demonstrate the characteristic of earnings conservatism whether controlling for the level of beginning-of-period earnings conservatism or not, but this study fails to obtain sufficient evidence to assert that foreign investment has systematic effects on earnings conservatism in Taiwan.
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LU, MEI-HUI, and 呂美慧. "銀行業的競爭程度及會計盈餘的時效性、穩健性之分析." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/09192143201978451287.
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博士國立政治大學
金融研究所
94
There are three issues in this dissertation. The first one is to analyze the yearly degree of competition and its variation in Taiwan’s banking industry with the Panzer-Rosse model. We find that the markets over the period 1996-2000 were characterized with monopolistic competition or perfect competition, while the system was characterized by monopolistic competition in 2001 and 2002 after we take into consideration the possibility of outliers. Furthermore, the results also suggest that the competition has declined in Taiwan’s banking industry. The second topic is to investigate the relationship between banking competition and the ratio of banks’ interest revenues to total assets. The results show that while the ratio of bank’s interest revenues to total assets is lower, the bank faces a more competitive market. Moreover, competitive pressures have been improved for banks with different levels of interest revenues over total assets in East Asia after the financial crisis occurred in 1997. About the final issue, we try to find whether firms’ contemporaneous earnings affect the timeliness and conservatism of accounting earnings and their relationship. Our results show that the degree of timeliness and conservatism of accounting earnings are relevant to the level of earnings. Specifically, firms with poor earnings will decrease their earnings in recognizing good news but increase the level of conservative accounting. On the other hand, the level of conservative accounting is a decreasing function of earnings while the timeliness in recognizing good is increasing in earnings.
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Wang, Wen-ting, and 王文廷. "應用模糊田口方法於沖頭微凸脊穩健多目標最佳化設計." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/23663993765864561951.
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碩士國立高雄第一科技大學
機械與自動化工程研究所
104
With the evolution of the times and technology, metal components produced through die forming have decreased in size leading to challenges in drawing forming. Micro-drawing is one of the important processes. It has the advantage of high capacity and high efficiency. In the traditional deep-drawing process, the stress concentration on the fillet of the punch, which cause cracking. For industry, treatment methods are use lubricants or multi-pass molding, but it may be costly. In this study, an optimal microridge punch was designed using the robust multi-objective design in the fuzzy Taguchi method to enhance the formability of deep drawing process. Using a round, stainless steel cup measuring 2.5 mm in inner diameter and 0.1 mm in thickness, four punch microridge dimension parameters that influenced the thinning rate (TR) and stripping force (SF) during drawing forming were explored, they are ridge nose radius (RRN), ridge to punch nose distance (DR), ridge height (HR) and ridge gap (GR). The effect of the design parameters on the objective functions were verified using a factor effect analysis and an analysis of variance (ANOVA), whereas the measuring index of optimal multiple performance characteristics (MPC) was obtained using fuzzy logic inference. The analysis results showed that the dimension parameters that influenced TR and SF contribution, listed in descending order, were ridge gap (45.25%), ridge nose radius (40.86%), ridge-to-nose distance (11.18%), and ridge height (2.71%). The optimal values were subsequently used to design and produce drawing dies and an experiment was performed to verify their effectiveness. The experiment result showed that the optimal ridge punch drawing distance reached 1.542 mm, which was an increase of 55.60% compared with the drawing distance of non-ridge punch 0.993mm.
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莊燕萍. "會計政策穩健性債權人-股東利益衝突與資金成本之關係." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/70690895240117874172.
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Zhang, Guan Yi, and 張貫一. "連續時間延遲系統的數位模式轉換與其強健穩定度分析." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/18954435426137376425.
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HENG, LIOU SHIUE, and 劉學鴻. "隨機需求之多重商品全面穩健配銷網路最佳化設計與信賴度探討隨機需求之多重商品全面穩健配銷網路最佳化設計與信賴度探討隨機需求之多重商品全面穩健配銷網路最佳化設計與信賴度探討隨機需求之多重商品全面穩健配銷網路最佳化設計與信賴度探討." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/35945005283382342137.
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Lee, Chien-He, and 李建和. "公司經理人的風險偏好及過度自信程度對公司會計穩健性之影響." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/08250419265915445446.
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碩士國立東華大學
財務金融學系
103
The main purpose of this paper is which level of accounting conservatism overconfident managers prefer in rational and unrational environment. We predict company managers prefer less accounting conservatism in risk aversion environment. Company managers prefer less accounting conservatism to prevent misestimate accounting reports income and then coming lawsuit risk. On the other hand non-confident company managers prefer accounting conservatism because they dont need to operate accounting reports numbers for misestimating prediction company income. In unrational environment overconfident company managers still prefer less accounting conservatism. Overconfident company managers will operate accounting reports income numbers for overoptimistic company operation performance and expect reversing company loss in next acconting year. We predict company managers will make the same choices in order to aviod misvalue company operation perfermance or keep reputation in rational and unrational situations.
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吳政峰. "順序特徵結構設計研究及其應用在最大強健穩定度與最小迴授增益." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/40215451767739522127.
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