Download or read book Acoustic Array Systems written by Mingsian R. Bai and published by John Wiley & Sons. This book was released on 2013-03-07 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a unified framework of far-field and near-field array techniques for noise source identification and sound field visualization, from theory to application. Acoustic Array Systems: Theory, Implementation, and Application provides an overview of microphone array technology with applications in noise source identification and sound field visualization. In the comprehensive treatment of microphone arrays, the topics covered include an introduction to the theory, far-field and near-field array signal processing algorithms, practical implementations, and common applications: vehicles, computing and communications equipment, compressors, fans, and household appliances, and hands-free speech. The author concludes with other emerging techniques and innovative algorithms. Encompasses theoretical background, implementation considerations and application know-how Shows how to tackle broader problems in signal processing, control, and transudcers Covers both farfield and nearfield techniques in a balanced way Introduces innovative algorithms including equivalent source imaging (NESI) and high-resolution nearfield arrays Selected code examples available for download for readers to practice on their own Presentation slides available for instructor use A valuable resource for Postgraduates and researchers in acoustics, noise control engineering, audio engineering, and signal processing.

Download or read book Advanced Array Systems Applications and RF Technologies written by Nicholas Fourikis and published by Elsevier. This book was released on 2000-05-16 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Array Systems, Applications and RF Technologies adopts a holistic view of arrays used in radar, electronic warfare, communications, remote sensing and radioastronomy. Radio frequency (RF) and intermediate frequency (IF) signal processing is assuming a fundamental importance, owing to its increasing ability to multiply a system's capabilities in a cost-effective manner. This book comprehensively covers the important front-end RF subsystems of active phased arrays, so offering array designers new and exciting opportunities in signal processing. - Provides an up to date record of existing systems from different applications - Explores array systems under development - Bridges the gap between textbook coverage of idealized phased arrays and practical knowledge of working phased arrays - Recognises the significance of cost to the realization of phased arrays - Discusses future advances in the field that promise to deliver even more affordable arrays ['intelligent' or self-focussing/-cohering arrays]

Download or read book Optimization of Performance Indices in Discrete Array Systems written by David Keun Cheng and published by . This book was released on 1967 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A basic theorem useful for the optimization of the performance indices of arbitrary antenna arrays is first reviewed. It is then applied to a general, three-dimensional array. In particular, it is specialized to determine the maximum obtainable directive gain and the main-beam radiation efficiency for circular and elliptical arrays. The gain optimization principle is also extended to arrays responding to quasi-monochromatic periodic signals and to arrays which are subject to random errors in excitation amplitudes and phases and in element positions. When the performance index of interest is the output signal-to-noise power ratio, consideration must be given to the power spectral densities of both the signal and the noise, the noise spatial distribution, the antenna space-frequency response function, the system internal noise, and the transfer function of the linear processor. The procedure for the maximization of the output signal-to-noise power ratio of an array of an arbitrary geometrical configuration when there are random variations in the design parameters is also reviewed. (Author).

Download or read book Cartesian Feedback Control for MRI Transmitter Array Systems written by Marta Gaia Zanchi and published by Stanford University. This book was released on 2010 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate control of the radio-frequency (RF) electromagnetic fields in Magnetic Resonance Imaging (MRI) is necessary to ensure patient safety and provide high-quality diagnostic capabilities. Precise control is however becoming increasingly difficult to achieve, given the recent trends toward high fields and transmitter array systems. At high fields, imaging is performed in a frequency regime where the wavelength is on the order of, or smaller than, the dimensions of the human body. This leads to prominent wave behavior, non-uniform field patterns, and increased power deposition. Multi-element transmitter array systems with independent phase and amplitude control of their elements support methods that can mitigate these problems. However, in turn, they demand high fidelity RF reproduction and may lead to undesired electromagnetic interactions between elements of the arrays and with interventional devices. Frequency-offset Cartesian feedback can be used to address all of these issues. In combination with the use of polyphase error amplifiers (to implement a low-IF control bandwidth), Cartesian feedback can be used with MRI power amplifiers and transmit coils to increase the fidelity of RF reproduction, without the in-bandwidth DC-offsets and quadrature mismatches that may lead to imaging artifacts such as bright spots and ghosting. In addition, the control system, which includes autotuning circuitry for stability and vector multipliers circuitry for feedback manipulation, can be used to tune the series output impedance of these amplifiers, thereby reducing the likelihood of interactions between elements of transmit array systems. Furthermore, a miniaturized variation of the control system (called Active Cable Trap) can be used on guidewires to suppress undesired currents elicited by coupling with the RF fields of the transmit coils. In an era of rapid progress in high field MRI for clinical applications, the frequency offset Cartesian feedback method and system thus promises to address many of the challenges faced by designers of multi-element transmitter array systems.

Download or read book Adaptive Array Systems written by Ben Allen and published by John Wiley & Sons. This book was released on 2006-02-03 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last fifty years, extensive studies have been carried out worldwide in the field of adaptive array systems. However, far from being a mature technology with little research left to tackle, there is seemingly unlimited scope to develop the fundamental characteristics and applications of adaptive antennas for future 3G and 4G mobile communications systems, ultra wideband wireless and satellite and navigation systems, and this informative text shows you how! Provides an accessible resource on adaptive array fundamentals as well as coverage of adaptive algorithms and advanced topics Analyses the performance of various wideband beamforming techniques in wideband array processing Comprehensively covers implementation issues related to such elements as circular arrays, channel modelling and transmit beam forming, highlighting the challenges facing a designer during the development phase Supports practical implementation considerations with detailed case studies on wideband arrays, radar, sonar and biomedical imaging, terrestrial wireless systems and satellite communication systems Includes examples and problems throughout to aid understanding Companion website features Solutions Manual, Matlab Programs and Electronic versions of some figures Adaptive Array Systems is essential reading for senior undergraduate and postgraduate students and researchers in the field of adaptive array systems. It will also have instant appeal to engineers and designers in industry engaged in developing and deploying the technology. This volume will also be invaluable to those working in radar, sonar and bio-medical applications.

Download or read book Space Time Wireless Systems written by H. Bölcskei and published by Cambridge University Press. This book was released on 2006-06-15 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive reference for readers wanting to learn about the entire range of relevant aspects in wireless communications.

Download or read book Practical Phased array Antenna Systems written by Eli Brookner and published by Artech House on Demand. This book was released on 1991 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to the principles of phased array antenna design. It is a set of 12 lecture notes that originally accompanied a series of intensive short courses presented in the mid-70s. With an explicitly tutorial approach, this book offers a concise, introductory-level survey of the fundamentals without dwelling on extensive mathematical derivations or abstruse theory. Its presentation focuses on step-by-step design procedures and provides practical results using extensive curves, tables and illustrative examples.

Download or read book Integrated Analytical Systems written by Salvador Alegret and published by Gulf Professional Publishing. This book was released on 2003-06-19 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lntegration, a new paradigm in analytical chemistry; Integration in science and technology; Integration in analytical chemistry; Partsand components; Supportedreagents; Separation membranes; Systems; Total analysis systems; Miniaturised systems; Networked systems; Sensors; Electrochemical sensors; Optochemical sensors; Arraysystems; Redundant-sensor array systems; Selective-sensor array systems; Cross-selective sensor array systems; Microsystems; Microsensors; Analytical microsystems; Array microsystems; Nanosystems; Conclusions and perspectives; lntegrated separation systems; General principIes ofbi-phase separation; Thermodynamics ofbi-phase equilibrium; Integration concepts in bi-phase separation; Integration of uptake and stripping steps; Multiplication of single separation effect; Frontal íon exchange chromatography; Reverse frontal íon exchange chromatography; Displacement chromatography; Tandem íon exchange fractionation; Combined separation techniques; Solvent extraction-ion exchange. Aqua impregnated resins; Ion exchange-crystallisation. Ion exchange isothermal supersaturation; Ion exchange supersaturation of zwitterlites; Ion exchange supersaturation of electrolytes; Solid-phase spectrometric assays; Integration of processes in solid-phase spectrometric assays; Types of solid-phase spectrometric assays; Features of solid-phase spectrometric assays; Particulated solid-phase spectrometric assays; Fixation process; Operational aspects; Analytical characteristics; Mixtures resolution; Analytical applications; Membrane solid-phase spectrometric assays; Membrane filtration systems; Membrane 'problem' equilibration systems; Membrane 'problem' deposit systems; Continuous flow analytical systems; Reverse flow injection; Integrating effect of conventional flow injection units; Confluencepoints; Exchangedunits; Modifiedunits; Duplicateunits; Derivatisation reactions in flow injection systems; Redox reactions involving solid reagents; Micellar media; Photoinduced reactions; Electrogenerated reagents; Catalytic reactions; External energy sources integrated with flow injection; Conventional heat sources; illtrasound energy sources; Use of electrical energy; Microwave energy assistance; In-line coupling of simple non-chromatographic continuous separation units and flow injection manifolds; Couplings with techniques involving gas-separation: gas-diffusers, pervaporators and others; Couplings with liquid-liquid separators: dialysers and liquid-liquid extractors; Couplingswith liquid-solid separators and solid phase formation; On-line separation equipment and flow injection manifolds; On-line coupling of robotics and flow injection manifolds; Detection in flow injection; Flow injection-detector interfaces; Automatic calibration; Special uses of conventional detectors coupled to FI; Three-dimensional and complex detectors coupled to FI; Screening and flow injection Integration and flow injection; Distributed analytical instrumentation systems; Theremoteconcept; Elements in a measurement system; Distributed systems topologies; Theremoteplace; The benefits of distributed intelligence; The computer-controlling function; Virtual instruments; Smart/intelligent sensors; The link; Industrial networks; Ethernet; Wireless links; The local place; Remote analytical instruments/systems: application examples; Laboratory information management systems; The analytical laboratory; Role of an analytical laboratory; Need to increase productivity; The aims oflaboratory automation; Problems with laboratory automation; Solutions for laboratory automation; What is laboratory automation?; A definition oflaboratory automation; Laboratory automation constituent groups; Instrument automation; Communications; Data to information conversion; Information management; A laboratory automation strategy in practice; Laboratory Information Management Systems; What is a LIMS?; A LIMS has two targets; Construction of the LIMS matrix; LIMS matrix views; Organisational integration and LIMS; LIMS and the system development life cycle; System development life cycle; Project proposal; The LIMS project team; User requirements specification and system selection; Functional specification; Qualification of the system; User training and roll-out strategies; Project close-out; Post-implementation review; Enhancement ofthe system and controlling change; Chemically modified electrodes with integrated biomolecules and molecular wires; Enzyme redox catalysis; Redox hydrogels; Self-assembled polyelectrolyte and protein films; Self-assembled enzyme films; Electrocatalysis; Electronhopping; Different molecular architectures; Structure ofself-assembled enzyme films; Atomic force microscopy; Ellipsometry; Combination of QCM and ellipsometric measurements; Infrared spectroscopy (FTIR); Composite and biocomposite materiais forelectrochemicalsensing; Composite electrode materiaIs; Conducting composite; Conducting biocomposites; Composite- and biocomposite-based electrochemical sensors; Conductometric sensors; Potentiometric sensors; Amperometric sensors; Thick-film sensors; Sensors for voltammetric stripping techniques; Optical chemical sensors and biosensor; Sensor structure; Optical fibers; Optoelectronic instrumentation; Molecular recognition element; Sensor designs; Modes of optical signal measurements; Absorbance measurement; Reflectance measurement; Fluorescence measurement; Chemiluminescence measurement; Electronic tongues: new analytical perspective of chemical sensors; General approach to the application of sensor arrays; Why use sensor systems?; Inspirations from chemometrics and biology; Advantages of sensor systems in comparlson with discrete sensors; Specific features of the sensors for the electronictongue; Electronic tongue systems; Sensors; System designs; Hybrid systems; Data processing; Selected applications ofthe electronic tongue; Application areas and analytes; Quantitative analysis; Qualitative analysis, recognition, identification andclassification; Comparison with human perception offlavours; Taste quantification; Application ofhybrid systems; Problems and perspective; A Taste sensor; Structure of the taste sensor; Response characteristics; Aminoacids; Classification oftaste ofamino acids; Discrimination of D-amino acids from L-aminoacids; Quantification ofthe taste of foods; Interaction between taste qualities; Suppression ofbitterness due to phospholipids; Scale ofbitterness; Suppression of bitterness due to taste substances; Detection of wine flavor using taste sensor and electronic nose; Perspective; Application of electronic nose technology for monitoring water and wastewater; Electronic nose technology; Sensor types; Analysis ofelectronic nose data; Electronic nose instrumentation; Sensor array components; Commercial systems; Application to water and wastewater monitoring; Laboratory-based systems; On-line monitoring systems; lntegrated optical transducers for (bio)chemical sensing; Basic concepts; Fundamentals of optical waveguides; Detection principIes: Types of devices; Technologies for integrated optical transducer fabrication; Substrate materiaIs and specific processes; Basic technological processes; Integrated optical sensors; Absorbancesensor; Gratingcoupler; Resonantmirror; Mach-Zehnder interferometer; Towards a total integrated system; High arder hybrid FET module for (bio)chemical andphysicalsensing; Design concepts of(bio)chemical sensor arrays; High arder sensor module based on an identical transducer principIe; Hybrid module design; ISFET fabrication; Measuring system and sensor configurations; Multi-parameter detection of both (bio)chemical and physical quantities using the same transducer principIe; ISFET-based pH sensor; ISFET-based penicillin sensor; ISFET-based temperature sensor; ISFET-based flow-velocity sensor; ISFET-based flow-direction sensor;ISFET-based diffusion-coefficient sensor; ISFET-based bioelectronic sensor; Applications of the hybrid sensor module; pH determination in human urine; pH measurement in rain droplets; Summary and conclusion; Microdialysis based lab-on-a-chip, applying a generic MEM Stechnology; The need for in vivo monitoring; Microdialysis; The microdialysis lab-on-a-chip; The micromachined double lumen microdialysis probe connector; The conventional microdialysis probe; Experimental; Results and discussion; The passive and the active calibration system; Passive contraI of a calibration plug; Active contraI of a calibration plug; Closed-loop controlled electrochemically actuated microdosing system; The flow-through potentiometric and amperometric sensor array; The flow-through potentiometric sensorarray; The flow-through reference electrode; The flow-through amperometric sensor; The integrated microdialysis-based lab-on-a-chip; The complete integrated microdialysis lab-on-a-chip; Measurements; Design methodology for a lab-on-a-chip for chemical analysis: the MAFIAS chip; The design path; The design; Chemistry; System schematics; Channel geometry; Specifications for the components; Thecomponents; Nanosensor and nanoprobe systems for in vivo bioanalysis; Background on biosensors and bioreceptors; Biosensing systems; Bioreceptor probes; Fiberoptics nanosensor system; Fabrication of the fiberoptic nanoprobe; Immobilization of receptors onto fiber nanoprobes; Experimental system and protocol for nanoprobe investigation of single cells; Optical measurement system; Applications in bioanalysis; Optical nanofiber probes for fluorescence measurements; Single-cell measurements using antibody-based nanoprobes.

Download or read book Machines Computations and Universality written by Jérôme Durand-Lose and published by Springer Science & Business Media. This book was released on 2007-08-23 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 5th International Conference on Machines, Computations, and Universality, MCU 2007, held in Orleans, France, September 2007. The 18 revised full papers presented together with nine invited papers cover Turing machines, register machines, word processing, cellular automata, tiling of the plane, neural networks, molecular computations, BSS machines, infinite cellular automata, real machines, and quantum computing.

Download or read book Solar electrochemical Power System for a Mars Mission written by Colleen A. Withrow and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quasi Optical Control of Intense Microwave Transmission written by Jay L. Hirshfield and published by Springer Science & Business Media. This book was released on 2006-02-12 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between February 17 and 20, 2004, approximately fifty scientists from ten countries came together at the Institute of Applied Physics (IAP), Nizhny Novgorod, Russia to participate in a NATO sponsored Advanced Research Workshop whose appellation is re flected in the title of this volume, namely Quasi Optical Control of Intense Microwave Transmission. The fashionable label “quasi optical ” has come into use in recent decades to denote structures whose characteristic dimensions exceed (sometimes by large factors) the free space radiation wavelength. Such structures were and are developed to replace the traditional single eigenmode ones in situations when high frequenc ies (short wavelengths) are combined with high powers, a combination that could otherwise lead to RF breakdown and high Ohmic wall heating rates. Treatments of guided wave propagation in oversized structures is aimed at pr eserving the propagating field coherence and thus to provide efficient transmission of RF power to remote destinations such as antennas, microwave ovens, plasma chemical reactors, nuclear fusion machines, and the like.

Download or read book Phased Array Based Systems and Applications written by Nicholas Fourikis and published by Wiley-Interscience. This book was released on 1997-02-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide to state-of-the-art phased array-basedsystems and applications First developed in 1937 to help improve communication links betweenthe United States and the United Kingdom, phased arrays haveevolved far beyond their original purpose. In addition to theirvalue in radio communications, phased arrays are now a vitalcomponent in national defense, space exploration, astronomy, andelectronic warfare. Phased Array-Based Systems and Applications was written forresearchers and engineers with a professional interest in phasedarray-based systems. Timely, authoritative, and comprehensive, itdiscusses the most current uses of phased arrays (operating at cmand mm wavelengths) in radar, radio astronomy, remote sensing,electronic warfare, spectrum surveillance, and communications. Thisexploration of systems that share the same principles and performsimilar functions helps phased array users in all these fieldslearn more about the systems and applications in which theyspecialize. More important, the complementary nature of a varietyof sensors is emphasized throughout the book. While his consistent focus is on practical applications, the authoralso provides generous coverage of basic theoretical principles tohelp readers understand the systems trade-offs made in the designof various phased arrays. An indispensable professional resource for radar and antennaengineers, Phased Array-Based Systems and Applications is also asuperior graduate-level text for students in these fields.

Download or read book Autodesk 3ds Max 2011 A Comprehensive guide written by Cadcim Technologies and published by Pearson Education India. This book was released on with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book FCC Record written by United States. Federal Communications Commission and published by . This book was released on 2003 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multifunction Array Radar written by Sergio Sabatini and published by Artech House Radar Library (Ha. This book was released on 1994 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details the advantages of MFAR main parameter design and guides you through parameter and performance evaluation procedures. It presents practical design information on combinations of various radar functions, clutter conditions, multipath, and transmitted waveform design when Doppler filters adapted for clutter cancellation.

Download or read book Radar Techniques Using Array Antennas written by Wulf-Dieter Wirth and published by IET. This book was released on 2001 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wirth (senior consultant, Research Establishment for Applied Science, Germany) introduces the techniques, procedures, and concepts related to modern radar using active array antennas. Chapters cover signal representation and mathematical tools, statistical signal theory, array antennas, beamforming, sampling and digitization of signals, pulse compression with polyphase codes, detection of targets by a pulse series, sequential detection, adaptive beamforming for jammer suppression, monopulse direction estimation, superresolution in angle, space-time adaptive processing, synthetic aperture radar with active phased arrays, inverse synthetic aperture radar, experimental phased array systems, the floodlight radar concept, and system and parameter considerations. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book On a Method of Comparison for Triple systems written by Louise D. Cummings and published by . This book was released on 1914 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: