Ultra wide band (UWB) is an emerging technology that recently has gained regulatory approval. It is a suitable solution for high speed indoor wireless communications due to its promising ability to provide high data rate at low cost and low power consumption. Another benefit of UWB is its ability to resolve individual multi-path components. This feature motivates the use of RAKE multi-path combining techniques to provide diversity and to capture as much energy as possible from the received signal. Potential future and rule limitation of UWB, lead to two important characteristics of the technology: high bit rate and low emitting power. Based on the power emission limit of UWB, the only choice for implementation is the low level modulation technology. To obtain such a high bit rate using low level modulation techniques, significant inter-symbol interference (ISI) is unavoidable. </p>Three N (N means the numbers of fingers) fingers RAKE receiver structures are proposed: the N-selective maximal ratio combiner (MRC), the N-selective MRC receiver with least-mean-square (LMS) adaptive equalizer and the N-selective MRC receiver with LMS adaptive combiner. These three receiver structures were all simulated for N=8, 16 and 32. Simulation results indicate that ISI is effectively suppressed. The 16-selective MRC RAKE receiver with LMS adaptive combiner demonstrates a good balance between performance, computation complexity and required length of the training sequence. Due to the simplicity of the algorithm and a reasonable sampling rate, this structure is feasible for practical VLSI implementations.

Ultra wide band (UWB) is an emerging technology that recently has gained regulatory approval. It is a suitable solution for high speed indoor wireless communications due to its promising ability to provide high data rate at low cost and low power consumption. Another benefit of UWB is its ability to resolve individual multi-path components. This feature motivates the use of RAKE multi-path combining techniques to provide diversity and to capture as much energy as possible from the received signal. Potential future and rule limitation of UWB, lead to two important characteristics of the technology: high bit rate and low emitting power. Based on the power emission limit of UWB, the only choice for implementation is the low level modulation technology. To obtain such a high bit rate using low level modulation techniques, significant inter-symbol interference (ISI) is unavoidable. </p>Three N (N means the numbers of fingers) fingers RAKE receiver structures are proposed: the N-selective maximal ratio combiner (MRC), the N-selective MRC receiver with least-mean-square (LMS) adaptive equalizer and the N-selective MRC receiver with LMS adaptive combiner. These three receiver structures were all simulated for N=8, 16 and 32. Simulation results indicate that ISI is effectively suppressed. The 16-selective MRC RAKE receiver with LMS adaptive combiner demonstrates a good balance between performance, computation complexity and required length of the training sequence. Due to the simplicity of the algorithm and a reasonable sampling rate, this structure is feasible for practical VLSI implementations.

Tuned vibration absorbers (TVAs) are spring-mass-damper devices used to mini-mize energy in a vibrating body. TVAs decrease in efficiency when the vibrating body is subjected to variable, broadband, or random excitation. A state-switched absorber (SSA) can be used in these variable, broadband, or random excitation cases to more effectively reduce excitation. An SSA is a mass-spring-damper where one or more of these elements can instantaneously and discretely change. An SSA was designed, built and tested to fit the specifications for TVAs found on ATR 72 and 42 airplane fuselages. A magnetorheological elastomer (MRE), an elastomer with imbedded iron particles, was selected as a variable spring. Flux lines concentrated through all MREs in absorber configurations. MREs containing 35% iron by volume yielded the largest frequency shift. A 35% MRE based absorber had a frequency range of 45-183 Hz, which corresponds to a 360% frequency increase. Transient absorber behavior was observed by recording rise and drop times to step field intensity changes.The 35% MRE absorber yielded a 0.20 second rise time and a 0.03 second drop time. Future work will determine whether a modified input signal can generate an appropriate transient response.

At the beginning of 21st century, the enterprise is experiencing the steep competition which creates by the fast change, has covered enterprise reforming and the globalization upsurge and the market mechanism expansion, the enterprise except the rapid reaction market shift, and does the global e tendency, how promote the competitive power which internal and already has, namely becomes the present most important topic, penetrates the information system the vigorous development, the information automation just like becomes the enterprise to promote to manage and to manage the competitive power most convenient method, plans from the Enterprise Resources Planing (ERP), Supplies Chain Manage (SCM), Customer Relations Manage (CRM) and so on each large-scale complex information system, by massive inductions with use, promotionThe enterprise manages the management level, the enterprise internal network and the Internet wide band development, inducts the use work flow system (Workflow System) to conducive toward favor the organization community to communicate, coordination, cooperation function, therefore in this research, carries on the research case in view of the domestic three major industries, work flow system induction to organizes the enterprise by the personnel which composes to bring in what kind of structure the change, because the coverage expands and the enterprise overall personnel, therefore regarding the organization culture, the work, the knowledge, the management, and so on all has the significant influence, therefore specially provides the correlation by this research the discussion, assists by the time to solve the enterprise to choose inducts work flow system it Question of the organization compatibility management.

This thesis presents an adaptive excitation controller of power systems. The control law is derived by using model reference adaptive control (MRAC) or adaptive pole placement control (APPC) and an equilibrium tracking mechanism is implemented to obtain equilibrium. By our approaches, system damping improvement is achieved to increase loadability as well as strengthen stability properties.

The adaptive dynamic inversion control methodology uses dynamic inversion to calculate the control, and adaptation to compensate for the errors in the inversion due to model uncertainties. Traditionally, adaptive control assumes full authority control and lacks an adequate theoretical treatment for control in the presence of actuator saturation limits. The objective of this research is to investigate the problems introduced in the adaptive dynamic inversion control scheme due to bounds on the control, and design control strategies to overcome these problems. The unique contribution of this research is that it identifies the maximum possible domain of attraction considering the control position limit, and uses a switching control strategy to contain the plant within the maximum possible domain of attraction. Another novel idea is that of a direction consistent control constraint mechanism which maintains the resultant direction of the rate of change of state the same as that of the desired, even in the presence of control saturation. This research uses a modified adaptation mechanism to prevent incorrect adaptation arising from trajectory errors due to control saturation. Mathematical development of the control laws and the adaptation mechanisms is presented along with rigorous proofs for convergence of the tracking error and stability of the overall control scheme. Finally, numerical simulation results are presented to validate the control methodology.

Taiwan's semiconductor industry to foster the Government's Trillion, Twin Stars of the second focus of the development of high value-added industries, while Taiwan's semiconductor industry is that the strengths of high economic efficiency of the factory production management capabilities. This article attempts to study qualitative narrative approach to explore the internal semiconductor factory management factory guided practical side the core of the park will be the text in a large semiconductor factory production of new products in development issues in the two abnormal debug ( debug), the engineering units of the mutual interaction between the key issues discussed by the cases described in the story to explore the impact of the competitiveness of the semiconductor wafer manufacturing background causes of temporal and spatial dynamics of the paper try to explore new management theory with meaning to the new management. In this paper, the use of research methods repeated quenching of the chain and found three new management direction and way of thinking: (1) semiconductor factory in adaptive learning and inter-departmental communication is often to throw the issue of interoperability between the ball acts to the surface ball on the culture may appear to be due to cross-border barriers to the field of communication, in fact, the semiconductor industry this is a special kind of division of labor approach to the play of its mobile emergency power needs. (2) In practice, the real effective and valuable cross-border organization of adaptive learning often takes place in the "after the review of the object", new object collection by different departments of the adaptive learning and communication can smooth-going until the object was to clarify the boundaries. (3) in practice, whether novice or veteran engineers through the KM (knowledge benchmark) or OJB (on job training) will be ready a certain degree of "Sense of the object", but because the pressure of the workplace, emotional, responsibilities will Engineers do not have a conscious "Selected Sense", the deliberate lowering of objects Sense. In this paper, semiconductor plant by practical examples of projects dealing with abnormal events to re-find and explore the meaning of new management practices with a view to the future management of the semiconductor manufacturing plant competitiveness have contributed to analysis and improvement, and look forward to the future, Taiwan's semiconductor sustainable manufacturing plant, to maintain competitiveness and enhance the management of a new theoretical framework and practices.

Thesis (Ph. D.)--University of Florida, 2000. / Title from first page of PDF file. Document formatted into pages; contains v, 181 p.; also contains graphics. Vita. Includes bibliographical references (p. 165-180).

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Adaptive Management (AM) is an “approach to managing natural resources that emphasizes learning from the implementation of policies and strategies” (Allan & Curtis, 2005). The approach involves the monitoring and evaluation of hypotheses regarding system responses and/or the success of individual projects followed by integration of the findings into future efforts. It can be characterized as active (focused upon testing hypotheses) or passive (focused upon implementation). AM has been used by several federal and state agencies for the implementation of large-scale restoration efforts. This paper explores the use of AM in two large, regional water resources projects with state and federal agency involvement and significant ecological and economic resources at risk without intervention: the Sacramento-San Joaquin Bay Delta in California and the Everglades Restoration in Florida. The paper explores potential avenues for further improvement of the AM efforts with an emphasis on: governance; establishment of networks to aid adaptive management, provisions for funding especially for active AM; cost-benefit analyses; and delegation of authority to allow for implementation of adaptive management. / text