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Messung und Berechnung des Resonanzverhaltens gekoppelter Helmholtz-Resonatoren in technischen Verbrennungssystemen

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ISBN: 9783866446588 Year: Pages: XIV, 150 p. DOI: 10.5445/KSP/1000022479 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Chemical Engineering
Added to DOAB on : 2019-07-30 20:01:59
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Für eine quantitative Vorhersage des Stabilitätsverhaltens eines technischen Verbrennungssystems in Hinblick auf das Auftreten selbsterregter Druck-/Flammenschwingungen, ist es u. a von entscheidender Bedeutung das Übertragungsverhalten der Brennkammer einschließlich vor- und nachgeschalteter Bauteile zu kennen (Helmholtz-Resonatoren). In dieser Arbeit wurde ein Modell zur Vorhersage des Resonanzverhaltens realer, gedämpfter Verbrennungssysteme auf gekoppelte Systeme erweitert.

Untersuchung der Eigenschaften von planaren Mikrowellenresonatoren für Kinetic-Inductance Detektoren bei 4,2 K

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Book Series: Karlsruher Schriftenreihe zur Supraleitung / Hrsg. Prof. Dr.-Ing. M. Noe, Prof. Dr. rer. nat. M. Siegel ISSN: 18691765 ISBN: 9783866447158 Year: Volume: 5 Pages: V, 211p. DOI: 10.5445/KSP/1000023889 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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Das Konzept der Kinetic-Inductance Detektoren (KID) bietet ein großes Potential für den Entwurf von hochempfindlichen und hochauflösenden Detektorarrays. In dieser Arbeit werden für KIDs planare Leitungsresonatoren optimiert und deren Güten maximiert. Anhand von Simulationen und Messungen wird die Packungsdichte von Multi-Resonator-Systemen untersucht und parasitäre Kopplungen minimiert. Die Erweiterung vom Einzelresonator zum Array wird aufgezeigt.

Hybrid quantum system based on rare earth doped crystals

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Book Series: Experimental Condensed Matter Physics / Karlsruher Institut für Technologie, Physikalisches Institut ISSN: 21919925 ISBN: 9783731503453 Year: Volume: 16 Pages: II, 140 S DOI: 10.5445/KSP/1000045903 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Physics (General)
Added to DOAB on : 2019-07-30 20:02:00
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Hybrid quantum circuits interfacing rare earth spin ensembles with microwave resonators are a promising approach for application as coherent quantum memory and frequency converter. In this thesis, hybrid circuits based on Er and Nd ions doped into Y?SiO? and YAlO? crystals are investigated by optical and on-chip microwave spectroscopy. Coherent strong coupling between the microwave resonator and spin ensemble as well as a multimode memory for weak coherent microwave pulses are demonstrated.

Development of CMOS-MEMS/NEMS Devices

Authors: ---
ISBN: 9783039210688 / 9783039210695 Year: Pages: 165 DOI: 10.3390/books978-3-03921-069-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-06-26 08:44:07
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Micro and nano-electro-mechanical system (M/NEMS) devices constitute key technological building blocks to enable increased additional functionalities within Integrated Circuits (ICs) in the More-Than-Moore era, as described in the International Technology Roadmap for Semiconductors. The CMOS ICs and M/NEMS dies can be combined in the same package (SiP), or integrated within a single chip (SoC). In the SoC approach the M/NEMS devices are monolithically integrated together with CMOS circuitry allowing the development of compact and low-cost CMOS-M/NEMS devices for multiple applications (physical sensors, chemical sensors, biosensors, actuators, energy actuators, filters, mechanical relays, and others). On-chip CMOS electronics integration can overcome limitations related to the extremely low-level signals in sub-micrometer and nanometer scale electromechanical transducers enabling novel breakthrough applications. This Special Issue aims to gather high quality research contributions dealing with MEMS and NEMS devices monolithically integrated with CMOS, independently of the final application and fabrication approach adopted (MEMS-first, interleaved MEMS, MEMS-last or others).]

Glassy Materials Based Microdevices

Authors: ---
ISBN: 9783038976189 Year: Pages: 284 DOI: 10.3390/books978-3-03897-619-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Electrical and Nuclear Engineering --- General and Civil Engineering --- Technology (General)
Added to DOAB on : 2019-03-21 15:50:41
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Microtechnology has changed our world since the last century, when silicon microelectronics revolutionized sensor, control and communication areas, with applications extending from domotics to automotive, and from security to biomedicine. The present century, however, is also seeing an accelerating pace of innovation in glassy materials; as an example, glass-ceramics, which successfully combine the properties of an amorphous matrix with those of micro- or nano-crystals, offer a very high flexibility of design to chemists, physicists and engineers, who can conceive and implement advanced microdevices. In a very similar way, the synthesis of glassy polymers in a very wide range of chemical structures offers unprecedented potential of applications. The contemporary availability of microfabrication technologies, such as direct laser writing or 3D printing, which add to the most common processes (deposition, lithography and etching), facilitates the development of novel or advanced microdevices based on glassy materials. Biochemical and biomedical sensors, especially with the lab-on-a-chip target, are one of the most evident proofs of the success of this material platform. Other applications have also emerged in environment, food, and chemical industries. The present Special Issue of Micromachines aims at reviewing the current state-of-the-art and presenting perspectives of further development. Contributions related to the technologies, glassy materials, design and fabrication processes, characterization, and, eventually, applications are welcome.

Keywords

micro-crack propagation --- severing force --- quartz glass --- micro-grinding --- microfluidics --- single-cell analysis --- polymeric microfluidic flow cytometry --- single-cell protein quantification --- glass molding process --- groove --- roughness --- filling ratio --- label-free sensor --- optofluidic microbubble resonator --- detection of small molecules --- chalcogenide glass --- infrared optics --- precision glass molding --- aspherical lens --- freeform optics --- micro/nano patterning --- 2D colloidal crystal --- soft colloidal lithography --- strain microsensor --- vectorial strain gauge --- compound glass --- microsphere --- resonator --- lasing --- sensing --- microresonator --- whispering gallery mode --- long period grating --- fiber coupling --- distributed sensing --- chemical/biological sensing --- direct metal forming --- glassy carbon micromold --- enhanced boiling heat transfer --- metallic microstructure --- microspheres --- microdevices --- glass --- polymers --- solar energy --- nuclear fusion --- thermal insulation --- sol-gel --- Ag nanoaggregates --- Yb3+ ions --- down-shifting --- photonic microdevices --- alkali cells --- MEMS vapor cells --- optical cells --- atomic spectroscopy --- microtechnology --- microfabrication --- MEMS --- microfluidic devices --- laser materials processing --- ultrafast laser micromachining --- ultrafast laser welding --- enclosed microstructures --- glass --- porous media --- fluid displacement --- spray pyrolysis technique --- dielectric materials --- luminescent materials --- photovoltaics --- frequency conversion --- device simulations --- europium --- luminescence --- hybrid materials --- microdevices --- light --- photon --- communications --- waveguides --- fibers --- biosensors --- microstructured optical fibers --- whispering gallery modes --- light localization --- optofluidics --- lab-on-a-chip --- femtosecond laser --- laser micromachining --- diffusion

Quantum Probability and Randomness

Authors: ---
ISBN: 9783038977148 9783038977155 Year: Pages: 276 DOI: 10.3390/books978-3-03897-715-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-04-25 16:37:17
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The last few years have been characterized by a tremendous development of quantum information and probability and their applications, including quantum computing, quantum cryptography, and quantum random generators. In spite of the successful development of quantum technology, its foundational basis is still not concrete and contains a few sandy and shaky slices. Quantum random generators are one of the most promising outputs of the recent quantum information revolution. Therefore, it is very important to reconsider the foundational basis of this project, starting with the notion of irreducible quantum randomness. Quantum probabilities present a powerful tool to model uncertainty. Interpretations of quantum probability and foundational meaning of its basic tools, starting with the Born rule, are among the topics which will be covered by this issue. Recently, quantum probability has started to play an important role in a few areas of research outside quantum physics&mdash;in particular, quantum probabilistic treatment of problems of theory of decision making under uncertainty. Such studies are also among the topics of this issue.

Keywords

quantum logic --- groups --- partially defined algebras --- quasigroups --- viable cultures --- quantum information theory --- bit commitment --- protocol --- entropy --- entanglement --- orthogonality --- quantum computation --- Gram–Schmidt process --- quantum probability --- potentiality --- complementarity --- uncertainty relations --- Copenhagen interpretation --- indefiniteness --- indeterminism --- causation --- randomness --- quantum information --- quantum dynamics --- entanglement --- algebra --- causality --- geometry --- probability --- quantum information theory --- realism --- reality --- entropy --- correlations --- qubits --- probability representation --- Bayes’ formula --- quantum entanglement --- three-qubit random states --- entanglement classes --- entanglement polytope --- anisotropic invariants --- quantum random number --- vacuum state --- maximization of quantum conditional min-entropy --- quantum logics --- quantum probability --- holistic semantics --- epistemic operations --- Bell inequalities --- algorithmic complexity --- Borel normality --- Bayesian inference --- model selection --- random numbers --- quantum-like models --- operational approach --- information interpretation of quantum theory --- social laser --- social energy --- quantum information field --- social atom --- Bose–Einstein statistics --- bandwagon effect --- social thermodynamics --- resonator of social laser --- master equation for socio-information excitations --- quantum contextuality --- Kochen–Specker sets --- MMP hypergraphs --- Greechie diagrams --- quantum foundations --- probability --- irreducible randomness --- random number generators --- quantum technology --- entanglement --- quantum-like models for social stochasticity --- contextuality

Humidity Sensors. Advances in Reliability, Calibration and Application

Authors: --- ---
ISBN: 9783039211227 / 9783039211234 Year: Pages: 198 DOI: 10.3390/books978-3-03921-123-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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Humidity detection has deep significance for the scientific research surrounding medical care and human performance, and the industrial development of agriculture, geography and automated instruments. This special issue aims to showcase some of the advancements in humidity sensor design and calibration, and its applications. The selected papers cover a variety of humidity sensor-related topics including material science, chemistry and industrial engineering. Through dedicated contributions from peer reviewers and the editorial team, this book aims to offers reader some insight into the field of humidity sensor development and use.

MEMS Accelerometers

Authors: --- ---
ISBN: 9783038974147 / 9783038974154 Year: Pages: 252 DOI: 10.3390/books978-3-03897-415-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-06-26 08:44:06
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Micro-electro-mechanical system (MEMS) devices are widely used for inertia, pressure, and ultrasound sensing applications. Research on integrated MEMS technology has undergone extensive development driven by the requirements of a compact footprint, low cost, and increased functionality. Accelerometers are among the most widely used sensors implemented in MEMS technology. MEMS accelerometers are showing a growing presence in almost all industries ranging from automotive to medical. A traditional MEMS accelerometer employs a proof mass suspended to springs, which displaces in response to an external acceleration. A single proof mass can be used for one- or multi-axis sensing. A variety of transduction mechanisms have been used to detect the displacement. They include capacitive, piezoelectric, thermal, tunneling, and optical mechanisms. Capacitive accelerometers are widely used due to their DC measurement interface, thermal stability, reliability, and low cost. However, they are sensitive to electromagnetic field interferences and have poor performance for high-end applications (e.g., precise attitude control for the satellite). Over the past three decades, steady progress has been made in the area of optical accelerometers for high-performance and high-sensitivity applications but several challenges are still to be tackled by researchers and engineers to fully realize opto-mechanical accelerometers, such as chip-scale integration, scaling, low bandwidth, etc.

Keywords

low-temperature co-fired ceramic (LTCC) --- capacitive accelerometer --- wireless --- process optimization --- performance characterization --- MEMS accelerometer --- mismatch of parasitic capacitance --- electrostatic stiffness --- high acceleration sensor --- piezoresistive effect --- MEMS --- micro machining --- turbulent kinetic energy dissipation rate --- probe --- microelectromechanical systems (MEMS) piezoresistive sensor chip --- Taguchi method --- marine environmental monitoring --- accelerometer --- frequency --- acceleration --- heat convection --- motion analysis --- auto-encoder --- dance classification --- deep learning --- self-coaching --- wavelet packet --- classification of horse gaits --- MEMS sensors --- gait analysis --- rehabilitation assessment --- body sensor network --- MEMS accelerometer --- electromechanical delta-sigma --- built-in self-test --- in situ self-testing --- digital resonator --- accelerometer --- activity monitoring --- regularity of activity --- sleep time duration detection --- indoor positioning --- WiFi-RSSI radio map --- MEMS-IMU accelerometer --- zero-velocity update --- step detection --- stride length estimation --- field emission --- hybrid integrated --- vacuum microelectronic --- cathode tips array --- interface ASIC --- micro-electro-mechanical systems (MEMS) --- delaying mechanism --- safety and arming system --- accelerometer --- multi-axis sensing --- capacitive transduction --- inertial sensors --- three-axis accelerometer --- micromachining --- miniaturization --- stereo visual-inertial odometry --- fault tolerant --- hostile environment --- MEMS-IMU --- mode splitting --- Kerr noise --- angular-rate sensing --- whispering-gallery-mode --- optical microresonator --- three-axis acceleration sensor --- MEMS technology --- sensitivity --- L-shaped beam --- n/a

Nonlinear Dynamics and Entropy of Complex Systems with Hidden and Self-excited Attractors

Authors: --- --- --- --- et al.
ISBN: 9783038978985 / 9783038978992 Year: Pages: 290 DOI: 10.3390/books978-3-03897-899-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-06-26 10:09:00
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In recent years, entropy has been used as a measure of the degree of chaos in dynamical systems. Thus, it is important to study entropy in nonlinear systems. Moreover, there has been increasing interest in the last few years regarding the novel classification of nonlinear dynamical systems including two kinds of attractors: self-excited attractors and hidden attractors. The localization of self-excited attractors by applying a standard computational procedure is straightforward. In systems with hidden attractors, however, a specific computational procedure must be developed, since equilibrium points do not help in the localization of hidden attractors. Some examples of this kind of system are chaotic dynamical systems with no equilibrium points; with only stable equilibria, curves of equilibria, and surfaces of equilibria; and with non-hyperbolic equilibria. There is evidence that hidden attractors play a vital role in various fields ranging from phase-locked loops, oscillators, describing convective fluid motion, drilling systems, information theory, cryptography, and multilevel DC/DC converters. This Special Issue is a collection of the latest scientific trends on the advanced topics of dynamics, entropy, fractional order calculus, and applications in complex systems with self-excited attractors and hidden attractors.

Keywords

new chaotic system --- multiple attractors --- electronic circuit realization --- S-Box algorithm --- chaotic systems --- circuit design --- parameter estimation --- optimization methods --- Gaussian mixture model --- chaotic system --- empirical mode decomposition --- permutation entropy --- image encryption --- hidden attractors --- fixed point --- stability --- nonlinear transport equation --- stochastic (strong) entropy solution --- uniqueness --- existence --- multiscale multivariate entropy --- multistability --- self-reproducing system --- chaos --- hidden attractor --- self-excited attractor --- fractional order --- spectral entropy --- coexistence --- multistability --- chaotic flow --- hidden attractor --- multistable --- entropy --- core entropy --- Thurston’s algorithm --- Hubbard tree --- external rays --- chaos --- Lyapunov exponents --- multiple-valued --- static memory --- strange attractors --- fractional discrete chaos --- entropy --- projective synchronization --- full state hybrid projective synchronization --- generalized synchronization --- inverse full state hybrid projective synchronization --- inverse generalized synchronization --- multichannel supply chain --- service game --- chaos --- entropy --- BOPS --- Hopf bifurcation --- self-excited attractors --- multistability --- sample entropy --- PRNG --- Non-equilibrium four-dimensional chaotic system --- entropy measure --- adaptive approximator-based control --- neural network --- uncertain dynamics --- synchronization --- fractional-order --- complex-variable chaotic system --- unknown complex parameters --- chaotic map --- fixed point --- chaos --- approximate entropy --- implementation --- hidden attractor --- hyperchaotic system --- multistability --- entropy analysis --- hidden attractor --- complex systems --- fractional-order --- entropy --- chaotic maps --- chaos --- spatial dynamics --- Bogdanov Map --- chaos --- laser --- resonator

Applications of Power Electronics

Authors: --- ---
ISBN: 9783038979746 / 9783038979753 Year: Volume: 1 Pages: 476 DOI: 10.3390/books978-3-03897-975-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2019-06-26 08:44:06
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Power electronics technology is still an emerging technology, and it has found its way into many applications, from renewable energy generation (i.e., wind power and solar power) to electrical vehicles (EVs), biomedical devices, and small appliances, such as laptop chargers. In the near future, electrical energy will be provided and handled by power electronics and consumed through power electronics; this not only will intensify the role of power electronics technology in power conversion processes, but also implies that power systems are undergoing a paradigm shift, from centralized distribution to distributed generation. Today, more than 1000 GW of renewable energy generation sources (photovoltaic (PV) and wind) have been installed, all of which are handled by power electronics technology. The main aim of this book is to highlight and address recent breakthroughs in the range of emerging applications in power electronics and in harmonic and electromagnetic interference (EMI) issues at device and system levels as discussed in ?robust and reliable power electronics technologies, including fault prognosis and diagnosis technique stability of grid-connected converters and ?smart control of power electronics in devices, microgrids, and at system levels.

Keywords

energy storage --- lithium-ion battery --- battery management system BMS --- battery modeling --- state of charge SoC --- grid-connected inverter --- power electronics --- multi-objective optimization --- switching frequency --- total demand distortion --- switching losses --- EMI filter --- power converter --- power density --- optimal design --- electrical drives --- axial flux machines --- magnetic equivalent circuit --- torque ripple --- back EMF --- permanent-magnet machines --- five-phase permanent magnet synchronous machine --- five-leg voltage source inverter --- multiphase space vector modulation --- sliding mode control --- extended Kalman filter --- voltage source inverters (VSI) --- voltage control --- current control --- digital control --- predictive controllers --- advanced controllers --- stability --- response time --- lithium-ion batteries --- electric vehicles --- battery management system --- electric power --- dynamic PV model --- grid-connected VSI --- HF-link MPPT converter --- nanocrystalline core --- SiC PV Supply --- DC–DC converters --- multi-level control --- renewable energy resources control --- electrical engineering communications --- microgrid control --- distributed control --- power system operation and control --- variable speed pumped storage system --- droop control --- vector control --- phasor model technique --- nine switch converter --- synchronous generator --- digital signal controller --- static compensator, distribution generation --- hybrid converter --- multi-level converter (MLC) --- series active filter --- power factor correction (PFC) --- field-programmable gate array --- particle swarm optimization --- selective harmonic elimination method --- voltage source converter --- plug-in hybrid electric vehicles --- power management system --- renewable energy sources --- fuzzy --- smart micro-grid --- five-phase machine --- fault-tolerant control --- induction motor --- one phase open circuit fault (1-Ph) --- adjacent two-phase open circuit fault (A2-Ph) --- volt-per-hertz control (scalar control) --- current-fed inverter --- LCL-S topology --- semi-active bridge --- soft switching --- voltage boost --- wireless power transfer --- DC–DC conversion --- zero-voltage switching (ZVS) --- transient control --- DC–DC conversion --- bidirectional converter --- power factor correction --- line frequency instability --- one cycle control --- non-linear phenomena --- bifurcation --- boost converter --- converter --- ice melting --- modular multilevel converter (MMC) --- optimization design --- transmission line --- static var generator (SVG) --- hardware-in-the-loop --- floating-point --- fixed-point --- real-time emulation --- field programmable gate array --- slim DC-link drive --- VPI active damping control --- total harmonic distortion --- cogging torque --- real-time simulation --- power converters --- nonlinear control --- embedded systems --- high level programing --- SHIL --- DHIL --- 4T analog MOS control --- high frequency switching power supply --- water purification --- modulation index --- electromagnetic interference --- chaotic PWM --- DC-DC buck converter --- CMOS chaotic circuit --- triangular ramp generator --- spread-spectrum technique --- system in package --- electric vehicle --- wireless power transfer --- inductive coupling --- coupling factor --- phase-shift control --- series-series compensation --- PSpice --- fixed-frequency double integral sliding-mode (FFDISM) --- class-D amplifier --- Q-factor --- GaN cascode --- direct torque control (DTC) --- composite active vectors modulation (CVM) --- permanent magnet synchronous motor (PMSM) --- effect factors --- double layer capacitor (DLC) models --- energy storage modelling --- simulation models --- current control loops --- dual three-phase (DTP) permanent magnet synchronous motors (PMSMs) --- space vector pulse width modulation (SVPWM) --- vector control --- voltage source inverter --- active rectifiers --- single-switch --- analog phase control --- digital phase control --- wireless power transfer --- three-level boost converter (TLBC) --- DC-link cascade H-bridge (DCLCHB) inverter --- conducting angle determination (CAD) techniques --- total harmonic distortion (THD) --- three-phase bridgeless rectifier --- fault diagnosis --- fault tolerant control --- hardware in loop --- compensation topology --- electromagnetic field (EMF) --- electromagnetic field interference (EMI) --- misalignment --- resonator structure --- wireless power transfer (WPT) --- WPT standards --- EMI filter --- electromagnetic compatibility --- AC–DC power converters --- electromagnetic interference filter --- matrix converters --- current source --- power density --- battery energy storage systems --- battery chargers --- active receivers --- frequency locking --- reference phase calibration --- synchronization --- wireless power transfer --- lithium-ion batteries --- SOC estimator --- parameter identification --- particle swarm optimization --- improved extended Kalman filter --- battery management system --- PMSG --- DC-link voltage control --- variable control gain --- disturbance observer --- lithium-ion power battery pack --- composite equalizer --- active equalization --- passive equalization --- control strategy and algorithm --- n/a --- common-mode inductor --- high-frequency modeling --- electromagnetic interference --- filter --- fault diagnosis --- condition monitoring --- induction machines --- support vector machines --- expert systems --- neural networks --- DC-AC power converters --- frequency-domain analysis --- impedance-based model --- Nyquist stability analysis --- small signal stability analysis --- harmonic linearization --- line start --- permanent magnet --- synchronous motor --- efficiency motor --- rotor design --- harmonics --- hybrid power filter --- active power filter --- power quality --- total harmonic distortion --- equivalent inductance --- leakage inductance --- switching frequency modelling --- induction motor --- current switching ripple --- multilevel inverter --- cascaded topology --- voltage doubling --- switched capacitor --- nearest level modulation (NLM) --- total harmonic distortion (THD) --- dead-time compensation --- power converters --- harmonics --- n/a

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