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etdncku.lib.ncku.edu.tw 檢索結果共 20856 筆,本頁資料從第 1 筆到第 12 筆

Sensor network is an important issue in recent studies. Rapid advances in the micro-electronic and wireless telecommunications field in recent decades have made possible the realization of low-cost miniaturized sensor for a variety of applications. The success of many wireless sensor network (WSN) applications, such as moving target tracking and environment monitoring, ....

By 高宏政-電機工程學系碩博士班-國立成功大學-博士-2009-11-27
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In this dissertation, we investigate two research issues. One is about the super-peer overlay topology design in two-layer hierarchy unstructured peer-to-peer (P2P) systems, comprising an upper layer of super-peers and an underlying layer of ordinary peers. The two-layer P2P systems are commonly used to improve the performance of large-scale P2P systems. However, the op....

By 趙志宏-電機工程學系碩博士班-國立成功大學-博士-2009-11-27
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Understanding the effects of abrasive machining on the material removal mechanism and surface integrity of brittle materials, such as phase transformation and residual stress, can help selection of optimal conditions for ductile-regime machining of brittle material, and give the insights into the formation of phase change and residual stress on machined surface. In this....

By 廖永源-機械工程學系碩博士班-國立成功大學-博士-2009-11-27
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This qualitative study focuses on Taiwanese FDI in Poland in general rather than individual segments of industries. Taiwanese investments in Poland are very rare, making this an innovative area of study, and potential reference point for future Taiwanese investors considering Poland as a new location to invest. The research presented in this thesis is divided into two p....

By 馬瑞俠-國際管理碩士在職專班-國立成功大學-碩士-2009-11-24
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Extensive evidences from animal and human studies showing that psychological stress has a biphasic influence on cognitive function depend on the severity and context. Brief periods of stress can potentiate memory formation, where as more severe or prolonged stressors may cause neuron degeneration or synaptic plasticity blockade and exhibit marked deficits in various lea....

By 楊志豪-基礎醫學研究所-國立成功大學-博士-2009-11-23
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傳統 CRT TV 因尺寸的加大會導致過於笨重的缺點,以及數位電視興起而造成電視市場的重大變革,因此符合此需求之薄型平面電視便應運而生,尤其是面板廠商大規模的投入電漿與液晶電視的產出,更造成薄型平面電視蓬勃發展,然而此現象卻同時引發了電漿與液晶電視兩種電視技術彼此爭奪市場佔有率的競爭局面。 本研究以擴散模式為基礎,並結合人口成長的變動會影響潛在的使用者人數,進而會影響市場潛量的假設來建構產品擴散取代之預測模式,並應用於CRT 及LCD TV 電視市場產品的擴散取代效應進行分析。在探討PDP與LCD TV 兩者之間的動態競爭關係,採用競爭模式擴散系統-Lotka-Volterra 競爭模式,並藉由Lyapunov 函數進行均衡點之穩定性分析探討。結果顯示,對於首次購買的消費者而言,CRT TV 已非首選,而是轉而購買LCD TV。然而對....

By 王錫澤-工業與資訊管理學系碩博士班-國立成功大學-博士-2009-11-19
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本文針對摩擦攪拌銲接方法進行研究,透過對基礎銲接參數特性研究,進而深入探討銲接參數與機械性能及銲後變形量的關聯作用,建立可精準預測銲接變形量的參數設計方法,同時導入TRIZ設計方法協助進行創新設計,提供作為銲接設計者進行銲接製造時誘發創新靈感之設計工具。本文中首先對摩擦攪拌銲接方法與特性及TRIZ整合設計方法概述外,主要研究項目有三階段。首先進行「摩擦攪拌銲接銲接基礎參數與眾不同機械性能分析研究」,針對摩擦攪拌銲接銲接適用之鋁合金材料進行基本銲接參數特性研究,透過不同機械性質如抗拉強度、硬度、斷面組織等的基本性能分析,建立可行的銲接區域(welding zone);隨後進行「銲接參數與變形量關係特性研究」,透過適當的銲接參數實驗,提出銲接參數與銲後機械強度、收縮變形的量化關係,建立可預測銲接性能的設計方法。透過此特性設計研究,將銲接製....

By 謝興達-機械工程學系碩博士班-國立成功大學-博士-2009-11-19
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By 黃偉誠-微生物及免疫學研究所-國立成功大學-碩士-2009-11-19
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Globalization, customization, quick response and rapid technology changes are important environmental challenges facing enterprises in recent years. Firms increasingly must offer differentiated products that are differentiated in terms of quality, function, and so on to target fickle customer preferences as well as different levels of willingness to pay. Enterprises sho....

By 胡瑞明-工業與資訊管理學系碩博士班-國立成功大學-博士-2009-11-18
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Inter-Vehicle Communications (IVC) and Roadside-to-Vehicle Communications (RVC) in vehicular networks based on IEEE 802.11 are emerging technologies for Intelligence Transportation System (ITS). With them vehicles can opportunistically exploit infrastructures through open Access Points (APs) to efficiently communicate with other vehicles. This is to avoid long wireless ....

By 王奕翔-電腦與通信工程研究所-國立成功大學-碩士-2009-11-18
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The inability to collect cyclic garbage is generally considered the major weakness of reference counting. Reference counted systems handle this problem by incorporating either a global tracing collector or a local tracing collector that considers only the cycle candidates (i.e. objects that may contain cyclic garbage). Particularly, the latter has become a preferred one....

By 林錦陽-工程科學系碩博士班-國立成功大學-博士-2009-11-17
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Creating a comfortable environment has become a sought-after goal for both home appliances and motor manufacturers due to the increasing consumer demand for an improved quality of life in recent years. Thus, the issues on how to minimize the vibration and noise of motors have gradually received substantial attention. This dissertation explores the effects of electromagn....

By 陳航生-機械工程學系碩博士班-國立成功大學-博士-2009-11-17
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