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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
431

Analysis of E-banking Innovation and Impact using a Hypercube Model

Chen, Po-sheng 12 May 2006 (has links)
Over the past decade, the rapid developments and growth of information and communication technology (ICT) have triggered a new wave of financial innovation¡Ðelectronic banking (e-banking). This study utilizes a hypercube model with secondary data analysis to analyze the differences in technological knowledge and business model aspects used in e-banking versus bricks-and-mortar banking, so as to explore the core capabilities in these two dimensions of e-banking innovation. The results indicate that the nature of e-banking innovation is disruptive, leading to drastic changes in both technological knowledge and business model for customers and incumbent banks. However, the innovation is modular for provider and architectural for regulators. We further identify nine core technical and eleven core business capabilities that are necessary for the stakeholders to cope with the change, each appearing to address either technical or business aspects of e-banking transformation. The findings have the potential to contribute to the understanding of impacts occurring in the change associated with e-banking and offer rich insights for the stakeholders to exploit e-banking opportunities.
432

Molecular dynamic simulation of solute concentration in front of a solidifict front

Liao, Dun-cai 18 July 2006 (has links)
We use molecular dynamics to simulate the rapid directional solidification of binary alloy solid-liquid interface in the non-equilibrium state. In the pulling fixed velocities, we report the temperature, density, and diffusion coefficient of the interface. In cooling fast, controlling the velocities of solidification for the important parameter of this text¡Ait produces different changes that velocity value will be affected by atom potential energy and system temperature and density¡Athough the system is pulling a fixed velocities, that the speed of every atom of the system is all not constant .The velocity will be changed into the driving force that the solute will be separated and trapped. In the segregation regime, we recover the exponential form of the concentration profile within the liquid phase. Solute trapping is shown to settle in progressively as V is increased or reduction and our results are in good agreement with the theoretical predictions of Aziz.
433

Dynamic Simulation and Performance Optimization of Reheating Furnace

Chen, Jian-Wen 06 July 2000 (has links)
Nowadays, many industries are searching new and effective substitutes for traditional energy resources. Heavy industries are not excluded. In order to use the most of the limited resources, they look for new techniques and new energy management systems which are efficient in energy consumption. Studying in saving energy for reheating furnace and in approving operation conditions may help heavy industries to reduce costs and to enhance quality of products. ¡@¡@Inevitably, the inner compositions of alloy ingots are not uniform during continuous casting. To solve this problem, we usually do heat treatment on alloy ingots before casting. Besides, to ensure the quality and stability of alloy ingots in heat treatment, we need an effective tool to monitor the temperature distribution on ally ingots. Moreover, the precise control over energy consumption can improve the efficiency of reheating furnace and can reduce costs. ¡@¡@This study focuses on alloy ingots. We simulate heat transfer by numerical methods and construct the integrated software to simulate the characteristics of reheating furnace in batch type operation. Analyses in the temperature distribution and energy consumption of alloy ingots in reheating process are also included. Besides, we choose some parameters, which might affect the energy consumption and try to find the best level parameter composition in reheating furnace analysis by Taguchi method. Some results are shown below: ¡]1¡^When temperature rising process starts, our model provides ¡@ ¡@reasonable and exact prediction in one or two hours. ¡]2¡^Reheating furnace treatment ability is the most important ¡@ ¡@control factor (out of eight) in this study. ¡]3¡^We can reduce around 3% of the consumption with the ¡@ ¡@parameters obtained by Taguchi method. ¡]4¡^The soaking degrees are all below 0.01¢J after heat treatment ¡@ ¡@on alloy ingots. ¡]5¡^We change the temperature rising rate to simulate the situation ¡@ ¡@of heated alloy ingots. We find that the higher temperature ¡@ ¡@rising rate is, the more significant temperature difference ¡@ ¡@inside alloy ingots is. On the other hand, the lower rate would ¡@ ¡@increase the soaking degree.
434

Observations on Dynamic Characteristics of Roller Gear Cams Due to Various Torque Compensations

Liu, Chung-Han 21 July 2000 (has links)
Roller gear cam (RGC) mechanisms are widely used in modern industries. While operated at high speeds, the indexing precision of these devices will be influenced by their dynamic characteristics. In this study, the Bond Graph Method is employed to construct a mathematical model to simulate the dynamic responses of RGC mechanisms. Meanwhile, associated experiments will be made to verify the effectiveness of this model. The influences of torque compensation mechanisms and different cam motion curves affecting the dynamic response of a RGC mechanism are observed. And the results show that the torque compensation mechanism is effective to the dynamic performance, and high-speed stability of a RGC mechanism. Besides, the simulated results also indicate that the kinematic properties of cam motion curves have certain influences on the residual vibrations of the system.
435

Design and Implement an Efficient Web Application Server

Wu, Jr-Houng 01 August 2000 (has links)
Web application servers are rapidly becoming the essential resources for competitive advantage, because e-businesses can gain amount of revenues. However, benefits are coming from consumers, more consumers cause more benefits. So web application server, which can provide more efficient services, will attract more people. To gain the biggest advantage, we research in Internet to find out a new method. A web application server means it will have frequent transactions. And it will access data in database and produce new web pages to respond consumers through the CGI (Common Gateway Interface) programs. In this paper, we present a new method that can improve performance of web application server through saving network¡¦s bandwidth, reducing web server loading and cutting wait-time of end user. The method primarily uses divided dedicated data and common information of the source web page. With saving the multiple download time of the common information, the efficiency of network¡¦s bandwidth and the user waiting time can be improved effectively. The method also can be easily combined with other existed technologies that can solve Internet efficiency problems. And we developed an approach to design and implement an efficient web application server. Finally, we measure the result of the traditional method and the new method to prove that our method really can save network¡¦s bandwidth, reduce web server loading and cut wait-time of end user. We hope the method can improve general existed problems in Internet.
436

Determination of chromium in water sample by inductively coupled plasma dynamic reavtion cell mass spectrometry

Chang, Yu-Ling 10 July 2001 (has links)
none
437

Distributed Power Control and Monitoring System with Internet Integration

Wang, Long-Cheng 28 June 2002 (has links)
With the rapid development of Internet and computer technology, users can already have many applications with remote Control and Monitoring ¡]CM¡^capability, including the CM on hardware power devices. Form the state-of-the-art Internet Technology the server-side computer can be used to integrate all client-side CM devices with distributive process and unified management to realize the development of distributed power CM system with Internet integration, which is also the goal of this thesis. The Internet based distributed power control and monitoring system was proposed in this thesis by the use of 8051 Micro-controller to develop a low cost, high stability, and user-friendly CM devices for home and factory uses. LabVIEW language was used to develop the Man-Machine Interface (MMI), and DataSocket tool was used to share the information on net. The MMI¡¦s designed for the CM devices are Multi-channel digital Input/Output acquisition system, Voltage/Current acquisition system and Temperature acquisition System. In this thesis, we used newly developed Internet technology and standards, also developed ActiveX control by using programming-language tools. So the ActiveX control will be embedded in the web browsers. Using ASP (Active Server Page) and Dynamic HTML for development, this research also built a web database system on Internet.
438

LDV Assisted Bubble Dynamic Parameter Measurements From Two Enhanced Tubes Boiling in Saturated R-134a

Lai, Wen-Chuan 23 July 2002 (has links)
Abstract Pool boiling process is frequently encountered in a number of engineering applications. It is difficult to exactly predict the heat transfer coefficient. This is because the boiling phenomenon is rather complex and influenced by many factors, such as surface condition, heater size, geometry, material, arrangement of heated rods, and refrigerants, etc. The key boiling parameters (bubble dynamics data) such as bubble departure diameter, frequency, velocity and nucleation site density will be varied in such different heated rod pitches resulting in the different effect of heat transfer. Furthermore, more fundamental of the physical phenomenon can be obtained. Pool boiling heat transfer of R-134a is investigated experimentally on twin tube arrangement. The tube pitch is 1.65 and 2.5. The surface condition was prepared with plasma spray coating. In addition, using the high-speed digital camera and LDV, the bubble diameter and dynamics of R-134a were measured while growing. The boiling curves in different twin-tube pitches were drawn and the influence of bubble velocity on heat transfer coefficients was also examined. Finally, to broaden our basic understanding of different arrangement of heated rods and heat transfer mechanisms, thermal design data of a flooded type evaporator of high performance as well as more and further physical insight of the above-stated nucleate boiling heat transfer can be acquired. The results would hopefully be helpful not only for the academia but also for the industry.
439

The study on operating system of game software firms, from Dynamic Capability Perspective's point of view.

Huang, Yu-Ju 24 June 2003 (has links)
In the present day, the worldwide competition has emerged in the high-tech industry, such as semi-conductor, information, and software etc. Industry observers have perceived a dilemma companies encountered. A large number of companies have accumulated some valuable resources, but they can¡¦t transfer their valuable resources into useful capabilities, let alone using them to build the long-term competitive advantage. However, in the shadow of worldwide recession, game software industry acts in the opposite way. Due to the prosperity of online games, increasing numbers of game software companies perform quite well, even more go on pubic offerings. In fact, the game software industry is a highly competing and turbulent context. In this industry, understanding how these firms striving to accumulate and make use of their resources and capabilities to achieve the expected performance brings the motive of this research. The focal point lies in the interrelationship between these processes. To react to the new type of competition, the research starts from dynamic capability viewpoints, analyzing the operating processes of game software industry firms towards resources and capabilities and interrelationship between them and organizational performance. The result shows in two dimensions: 1. The mutual influence between dynamic capabilities In the evolutionary process of a firm, the development of a successful path has been influenced by the intensity and direction of firm¡¦s learning capability. In a high velocity market, learning capability has obtained not only from the performance and trial and error experiences from events, but also from external environment. Besides, learning capability facilitates the fostering of resources reconfiguration when it¡¦s necessary to make any prompt correction. In such a turbulent context, in order to lower the increasing complexity of internal resources position resulted from external risks, firms tend to enhance the elaboration towards managerial process, such as the capabilities of integration, learning, reconfiguration, and transformation. Systematic tools used in traditional managerial process have difficulty when applying to the high velocity markets. To improve the timeliness of integration, informal interactions become the most important parts of internal operations. 2. The relationship between dynamic capability and organizational performance Due to high organizational flexibility firms in the game software industry need, more emphasis should be put on the integration of managerial processes and routines of execution. The consistency within process and routine can be regarded as one of the standards of performance evaluation because the well development of managerial process and routine will facilitate the building of competitiveness. Meanwhile, research shows, in a high velocity market, both the technological capabilities and timeliness of interaction between complementary assets are the two main factors in the process of commercialization of new technology, thus become another factors that influence on the market performance of organizations. In responding to the change of external industrial structure, in order to improve the performance by external resources, firms tend to make use of their high popularity and reputation to form alliance with different industries. This move not only improves their popularity but also facilitates the fostering and obtaining of new capabilities.
440

A Dynamic Programming Based Method for Multiclass Classification Problem

Pao, Yi-Hua 03 July 2003 (has links)
Abstract On the whole, there are two ways to dispose of multiclass classification problem. One is deal it with directly. And the other is dividing it into several binary-class problems. For this reason, it will be simpler as regards individual binary-class problems. And it can improve the accuracy of the multiclass classification problem by reorganize the effect. So how to decompose several binary-class problems is the most important point. Here, based on our study, we use Dynamic Programming as foundation to get the optimal solution of multiclass¡¦s decomposition. Not only get it simplify but also can achieved the best classified result.

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