Broadband design on dual and circularly polarized antennas for wireless communication systems
Broadband design on dual and circularly polarized antennas for wireless communication systems
... impedance bandwidth The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations Dual linear polarization is attained ... operating bandwidth This thesis presents the broadband design of dual and circularly polarized antennas, and the bandwidth definitions are first established 1.2 Bandwidth Definitions The bandwidth ... ABSTRACT The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations The quality of polarization is related...
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Design and analysis of rectifying circuits and antennas for wireless power transmission and ambient RF energy harvesting
... Suggestions for Future Works 141 Bibliography 143 iv Summary This thesis presents the design and analysis of antennas and rectifying circuits for applications in wireless power transmission ... capable of recycling low RF power A new rectenna with broad-band 1×4 quasi-Yagi antenna array and a dualband rectifier is designed to harvest the ambient RF power of GSM-1800 and UMTS-2100 bands ... RF energy harvesting 1.2.3 60-GHz Rectennas Since the invention of a rectenna, considerable research has been performed on rectennas for WPT applications Most of the development of RF power transmission...
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A Survey on Network Security and Attack Defense Mechanism For Wireless Sensor Networks pdf
... Data Traditional sensor network wireless Attack Data Traditional sensor network wireless or Random Kay Predistribution Data and information spoofing, Attacks in information in Transit Traditional ... sensor network wireless REWARD Blackhole attacks Traditional sensor network wireless Tiny Sec Data and Information spoofing, Message Replay Attack Data and Information spoofing, Message Replay ... active attacks involve some modifications of the data steam or the creation of a false stream in a WSN Mote-class versus laptop-class attacks: In moteclass (sensor- class) attacks, an adversary attacks...
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Báo cáo khoa học: The influence of cold shock proteins on transcription and translation studied in cell-free model systems pdf
... occurs on the transcriptional or on the translational level, the system of combined transcription translation was decoupled The inuence on the transcriptional level was investigated by in vitro transcription ... dissociation constants were derived for the inhibition of the protein expression by CSP using two models In the most simple model the inhibition is predominantly due to the binding of CSP to one component ... non -cold shock mRNA can be combined with the results of [3] They found an increase in the translation of cold shock mRNAs and of cold tolerant mRNAs with the addition of CspA to a translation...
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channel adaptive technologies and cross layer designs for wireless systems with multiple antennas
... PUBLICATION Channel- Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas Channel- Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas ... with respect to the target channel Channel -Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas: Theory and Applications By V K N Lau and Y.-K R Kwok ISBN 0-471-64865-5 ... Channel- Adaptive Technologies and Cross- Layer Designs for Wireless Systems with Multiple Antennas Theory and Applications Vincent K N Lau The Hong Kong University of Science and Technology...
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Báo cáo khoa học: "Independent position correction on tumor and lymph nodes; consequences for bladder cancer irradiation with two combined IMRT plan" pptx
... distribution was calculated for the following four situations: No position correction Daily position correction based on the bone match for both plans Daily position correction based on the tumor ... compared with correction on bony anatomy, correction on tumor position and no position correction Methods Patients and prescribed dose This simulation study included 20 patients with a histologically ... small corrections on a daily basis will become clinically applicable Conclusions Based on this study we conclude that applying independent position correction on bone for the elective field and on...
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Some fundamental issues in receiver design and performance analysis for wireless communication
... SOME FUNDAMENTAL ISSUES IN RECEIVER DESIGN AND PERFORMANCE ANALYSIS FOR WIRELESS COMMUNICATION WU MINGWEI (B.Eng, M.Eng., National University of Singapore) A THESIS SUBMITTED FOR THE ... Just like in any communication, two fundamental research issues in wireless communication are receiver design and performance analysis The objective of receiver design is to find an optimum receiver ... design for flat fading in this thesis Similarly, in the performance analysis for flat fading channels, there remain many unsolved problems We want to obtain the performance in a simple closed form,...
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Iterative receiver design for broadband wireless communication systems via expectation maximization (EM) based algorithms
... ITERATIVE RECEIVER DESIGN FOR BROADBAND WIRELESS COMMUNICATION SYSTEMS VIA EXPECTATION MAXIMIZATION (EM) BASED ALGORITHMS THE-HANH PHAM (B Eng., Hanoi ... recommendations for future works Chapter Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectation Maximization ... Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectation Maximization Algorithm...
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DSP algorithm and system design for UWB communication systems
... Three types of UWB systems are defined in this R&O: imaging systems, communication and measurement systems, and vehicular radar systems Specifically, UWB characterizes transmission systems with ... comparison for communication systems Figure 1.2 FCC regulated spectral mask for UWB indoor communication systems Figure 1.3 Operation distance and data rate of major wireless standards ... precision at the centimeter level); and More importantly, UWB systems have low system complexity and low cost, since they are essentially baseband systems and can be made nearly "all-digital",...
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Research on a novel buck boost converter for wind turbine systems
... the operation for this inverter have proved its feasibility for dc-ac conversion in wind turbine applications ACKNOWLEDGMENT The authors wish to thank Natural Sciences and Engineering Research Council ... possibility for a low cost and high efficiency dc-ac converter appropriate for small wind turbine applications The inverter has a low component count with only power semiconductor switches to accomplish ... Idisch+ Iout1 ON ON Q1 ON Q2 ON ON D1 ON ON D2 t0 ON t1 Fig Operation waveforms in a positive half cycle Mode 3: Negative half cycle (NHC) discharge mode Mode follows Mode in a negative half cycle...
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Tài liệu Synchronization and Linearity An Algebra for Discrete Event Systems doc
... where γ operates as z −1 For instance, the γ -transform of u is defined as ∞ u(i) ⊗ γ i , U (γ ) = i=0 1.3 Issues and Problems in Performance Evaluation 31 and Y (γ ) and X (γ ) are defined likewise ... in algebra, probability theory and linear system theory form an ideal background For algebra, [61] for instance provides suitable background material; for probability theory this role is for ... array processors (VLSI stands for ‘Very Large Scale Integration’) The theory of discrete events provides a method for analyzing the performances of so-called systolic and wavefront array processors...
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Báo cáo khoa học: "A FRIENDLY AND FLEXIBLE FRONT-END FOR DATA MANAGEMENT SYSTEMS" pptx
... to data items, and then express the query in a standard language (IL) A translator is written for each data management system in order to rephrase the IL query into the language of the data management ... Distributed Data Management and Computer Networks, May 25-27 1977, Berkeley, CA SECURITY Burger, J., Leal, A., and Shoshanl, A "Semantic Based Parsing and a Natural-Language Interface for Interactive Data ... specialist or learn a language to query his own data base, It is modular and table driven so that it can be interfaced with different data management systems and different applications It is written...
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THE AFTERLIVES OF COURSES ON THE NETWORK: INFORMATION MANAGEMENT ISSUES FOR LEARNING MANAGEMENT SYSTEMS pptx
... roles and responsibilities surrounding the operation and management of learning management systems Highlights of Information Management Issues If we examine the materials that a learning management ... interests in the course site that persist beyond the conclusion of the course for a number of reasons The course site may be critically important documentation of the quality of teaching by the faculty ... essentially part of the contract between the faculty member and the institution The nature of these institutional policies was a matter of considerable debate, and in some cases controversy, over the past...
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MEMS-based Circuits and Systems for Wireless Communication docx
... Switzerland a e-mail: marc-alexandre.dubois@csem.ch; claude.muller@csem.ch C.C Enz and A Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, ... 333, USA e-mail: piazza@ece.cmu.edu C.C Enz and A Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, DOI 10.1007/978-1-4419-8798-3 2, © ... exempt from the relevant protective laws and regulations and therefore free for general use While the advice and information in this book are believed to be true and accurate at the date of publication,...
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