Search results: Found 7

Listing 1 - 7 of 7
Sort by
Entwurf und Modellierung von Breitbandverstärkern mit variablem Gewinn in SiGe BiCMOS Technologien

Author:
Book Series: Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik ISSN: 18684696 ISBN: 9783731509103 Year: Volume: 91 Pages: XII, 156 p. DOI: 10.5445/KSP/1000091844 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:00
License:

Loading...
Export citation

Choose an application

Abstract

The present work deals with the development of broadband amplifiers with adjustable gain. Different circuit topologies for gain control are investigated, and several compact and distributed amplifiers are fabricated in SiGe BiCMOS technologies. Another key aspect of the work is the modeling of distributed amplifiers by means of image parameters, which enable an analytical and compact description.

Making Publics, Making Places

Authors: ---
ISBN: 9781925261431 Year: DOI: 10.20851/publics Language: English
Publisher: University of Adelaide Press
Subject: Information theory
Added to DOAB on : 2017-03-10 11:03:39
License:

Loading...
Export citation

Choose an application

Abstract

This book focuses on the surprising generative possibilities which digital and smart technologies offer media consumers, citizens, institutions and governments in making publics and places, across topics as diverse as Twitter audiences, rural news, the elasticity of the public sphere, Weibo, cultural heritage and responsive spaces in smart cities. Multidisciplinary perspectives engage with critical questions in new media scholarship. General readers, curious about how technologies are enabling social, public and civic participation, will enjoy the book’s mix of fresh approaches and insights.

Advancing Earth Surface Representation via Enhanced Use of Earth Observations in Monitoring and Forecasting Applications

Authors: --- --- --- --- et al.
ISBN: 9783039210640 9783039210657 Year: Pages: 262 DOI: 10.3390/books978-3-03921-065-7 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-12-09 11:49:15
License:

Loading...
Export citation

Choose an application

Abstract

The representation of the Earth's surface in global monitoring and forecasting applications is moving towards capturing more of the relevant processes, while maintaining elevated computational efficiency and therefore a moderate complexity. These schemes are developed and continuously improved thanks to well instrumented field-sites that can observe coupled processes occurring at the surface–atmosphere interface (e.g., forest, grassland, cropland areas and diverse climate zones). Approaching global kilometer-scale resolutions, in situ observations alone cannot fulfil the modelling needs, and the use of satellite observation becomes essential to guide modelling innovation and to calibrate and validate new parameterization schemes that can support data assimilation applications. In this book, we review some of the recent contributions, highlighting how satellite data are used to inform Earth surface model development (vegetation state and seasonality, soil moisture conditions, surface temperature and turbulent fluxes, land-use change detection, agricultural indicators and irrigation) when moving towards global km-scale resolutions.

Novel Photoactive Materials

Author:
ISBN: 9783038976509 Year: Pages: 166 DOI: 10.3390/books978-3-03897-651-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Physics (General) --- Science (General)
Added to DOAB on : 2019-03-05 14:29:32
License:

Loading...
Export citation

Choose an application

Abstract

Photoactivity represents the ability of a material, generally speaking a semiconductor, to become active when interacting with light. It can be declined in many ways, and several functionalities arising from this behavior of materials can be exploited, all leading to positive repercussions on our environment. There are several classes of effects of photoactivity, all of which have been deeply investigated in the last few decades, allowing to develop more and more efficient materials and devices. All of them share a common point, that is, the interaction of a material with light, although many different materials are taken into account depending on the effect desired—from elemental semiconductors like silicon, to more complex compounds like CdTe or GaAs, to metal oxides like TiO2 and ZnO. Given the broadness of the field, a huge number of works fall within this topic, and new areas of discovery are constantly explored. The special issue “Novel Photoactive Materials” has been proposed as a means to present recent developments in the field, and for this reason the articles included touch different aspects of photoactivity, from photocatalysis to photovoltaics to light emitting materials.

Solar Radiation, Modelling and Remote Sensing

Authors: ---
ISBN: 9783039210046 9783039210053 Year: Pages: 230 DOI: 10.3390/books978-3-03921-005-3 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-06-26 08:44:06
License:

Loading...
Export citation

Choose an application

Abstract

Accurate solar radiation knowledge and its characterization on the Earth’s surface are of high interest in many aspects of environmental and engineering sciences. Modeling of solar irradiance from satellite imagery has become the most widely used method for retrieving solar irradiance information under total sky conditions, particularly in the solar energy community. Solar radiation modeling, forecasting, and characterization continue to be broad areas of study, research, and development in the scientific community. This Special Issue contains a small sample of the current activities in this field. Both the environmental and climatology community, as the solar energy world, share a great interest in improving modeling tools and capabilities for obtaining more reliable and accurate knowledge of solar irradiance components worldwide. The work presented in this Special Issue also remarks on the significant role that remote sensing technologies play in retrieving and forecasting solar radiation information.

Keywords

Himawari-8/Advanced Meteorological Imager (Himawari-8/AHI) --- Geostationary Korea Multi-Purse Satellite/Advanced Meteorological Imager (GK-2A/AMI) --- broadband albedo at the top of the atmosphere (TOA albedo) --- reflected shortwave radiation at the top of the atmosphere (RSR) --- Clouds and the Earth Radiant Energy System (CERES) --- surface solar radiation --- remote sensing --- validation --- India --- solar radiation trends --- Solis scheme --- clear sky --- radiation model --- radiative transfer --- high turbidity --- water vapor --- solar radiation --- understory light condition --- forest canopy --- subcanopy light regime --- PAR --- shortwave radiation --- light attenuation --- remote sensing --- solar irradiance --- nowcasting --- AMESIS --- MSG --- SEVIRI --- radiance --- brightness temperature --- motion vector field --- photosynthetically active radiation --- global horizontal irradiance --- clustering analysis --- Kato bands --- solar irradiance --- MSG --- SEVIRI --- HRV --- AMESIS --- solar radiation --- global horizontal irradiance --- satellite-derived dataset --- validation --- solar energy --- aerosol impact --- earth observation --- clear sky index --- solar irradiance --- downward shortwave radiation --- global horizontal irradiance --- solar variability --- cloud categories --- GOES satellites --- evapotranspiration --- insolation --- surface energy balance --- data fusion --- water resource management --- California Delta --- solar radiation --- radiative transfer --- solar energy systems --- solar radiation forecasting

State-of-the-art Laser Gas Sensing Technologies

Authors: --- ---
ISBN: 9783039283989 9783039283996 Year: Pages: 278 DOI: 10.3390/books978-3-03928-399-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:08
License:

Loading...
Export citation

Choose an application

Abstract

Trace gas sensing technologies are widely used in many applications, such as environmental monitoring, life science, medical diagnostics, and planetary exploration. On the one hand, laser sources have developed greatly due to the rapid development of laser media and laser techniques in recent years. Some novel lasers such as solid-state, diode, and quantum cascade lasers have experienced significant progress. At present, laser wavelengths can cover the range from ultraviolet to terahertz, which could promote the development of laser gas sensing technologies significantly. On the other hand, some new gas sensing methods have appeared, such as photothermal spectroscopy and photoacoustic spectroscopy. Laser spectroscopy-based gas sensing techniques have the advantages of high sensitivity, non-invasiveness, and allowing in situ, real-time observation. Due to the rapid and recent developments in laser source as well as the great merits of laser spectroscopy-based gas sensing techniques, this book aims to provide an updated overview of the state-of-the-art laser gas sensing technologies.

Keywords

tunable mid-infrared solid-state laser --- thermal control --- all-fiber laser --- thermoelectric cooling --- finite-element analysis --- optical parametric oscillator --- Tm,Ho:LuVO4 laser --- PQS --- graphene saturable absorber --- mid-infrared --- single-frequency --- optical parametric oscillator (OPO) --- MgO:PPLN crystal --- continuous-wave (CW) --- diffuse integrating cavity --- TDLAS --- gas detection --- non-linearity --- quartz-enhanced photoacoustic spectroscopy --- quartz tuning fork --- gas sensing --- detection limit --- laser spectroscopy --- practical applications --- real-time observation --- optical sensing --- stokes vectors --- information processing technology --- tunable laser absorption spectroscopy --- mid-infrared fingerprint spectrum --- broadband spectrum --- trace gas detection --- wavelength modulation spectroscopy --- quantum cascade lasers --- interband cascade lasers --- carbon dioxide monitoring --- absorption spectroscopy --- temperature compensation --- wavelength modulation --- methane detection --- support vector machine --- chicken swarm optimization --- algorithm --- concentration prediction --- combustion diagnostic --- femtosecond laser --- two-photon femtosecond laser-induced fluorescence --- femtosecond laser-induced breakdown spectroscopy --- femtosecond laser electronic excitation tagging --- filament-induced nonlinear spectroscopy --- femtosecond laser-induced plasma spectroscopy --- hollow-core photonic crystal fiber --- GRIN fiber probe --- coupling efficiency --- gas sensing --- near-infrared --- C2H2 detection --- TDLAS --- time division multiplexing differential modulation --- a multi-reflection chamber --- laser absorption spectroscopy (LAS) --- combustion sensing --- direct absorption spectroscopy (DAS) --- wavelength modulation spectroscopy (WMS) --- design optimization --- noise reduction algorithms --- methane --- tunable diode laser --- wavelength modulation spectroscopy --- frequency modulation spectroscopy --- two-tone frequency modulation spectroscopy --- photothermal spectroscopy --- gas sensing --- detection limit --- laser spectroscopy --- practical applications --- intracavity gas detection --- interferometric gas detection --- deep-sea natural gas hydrate exploration --- 13CO2/12CO2 isotope ratio detection --- TDLAS technique --- mid-infrared ICL --- n/a

Signal Processing and Analysis of Electrical Circuit

Authors: --- ---
ISBN: 9783039282944 9783039282951 Year: Pages: 604 DOI: 10.3390/books978-3-03928-295-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2020-04-07 23:07:09
License:

Loading...
Export citation

Choose an application

Abstract

This Special Issue with 35 published articles shows the significance of the topic “Signal Processing and Analysis of Electrical Circuit”. This topic has been gaining increasing attention in recent times. The presented articles can be categorized into four different areas: signal processing and analysis methods of electrical circuits; electrical measurement technology; applications of signal processing of electrical equipment; fault diagnosis of electrical circuits. It is a fact that the development of electrical systems, signal processing methods, and circuits has been accelerating. Electronics applications related to electrical circuits and signal processing methods have gained noticeable attention in recent times. The methods of signal processing and electrical circuits are widely used by engineers and scientists all over the world. The constituent papers represent a significant contribution to electronics and present applications that can be used in industry. Further improvements to the presented approaches are required for realizing their full potential.

Keywords

VMD --- signal analysis --- ICEEMD --- IMF --- random noise --- attenuation --- commutator motor --- fault diagnosis --- method --- technique --- signal processing --- acoustic --- Inner and outer product --- tensor --- FPGA --- hardware --- direct digital synthesizer (DDS) --- frequency tuning word (FTW) --- stability --- accuracy --- demodulation --- phase-locked loop --- Chebyshev filter --- measurement noise suppression --- class AB operation --- CMOS --- current mirror --- current buffer --- quasi floating gate --- low power --- CMOS --- dynamic comparator --- offset calibration --- high speed --- low noise --- low power --- ADC --- all-pass filter --- CMOS --- time delay --- broadband --- true-time-delay --- electrochemical impedance spectroscopy --- FRA --- multichannel acquisition --- impedance spectrometry --- microcontroller --- intelligent vehicles --- LiDAR odometry --- range sensing --- simultaneous localization and mapping (SLAM) --- tilt sensor --- sensor data fusion --- complementary filters --- overlap-add processing --- spectral analysis --- variational mode decomposition (VMD) --- duffing chaotic oscillator (DCO) --- permutation entropy (PE) --- feature extraction --- frequency characteristic --- underwater acoustic signal --- ship-radiated noise --- PM/PWM --- capacitance-to-time conversion --- differential capacitive sensor --- brick-wall filter --- fuzzy logic --- induction motor --- Shannon entropy --- short-circuit fault --- APF --- CNFET --- pole-frequency --- chirality --- phase angle --- tuning --- DC–DC converter --- switched capacitor --- power management integrated circuit --- CMOS technology --- frequency standard comparator --- dual Mixing Time difference --- phase difference --- correlation function --- chebyshev polynomial --- compressed sensing --- estimated sparsity --- least squares solution --- stochastic gradient --- reconstruction probability --- direct position determination --- array signal processing --- Doppler shifts --- matrix eigen-perturbation theory --- system errors --- Cramér–Rao bound --- differential power analysis (DPA), SIMON --- fault injection --- double rate --- power randomization --- intention of movement classification --- EMG-Signals --- Support Vector Machines --- asynchronous --- delay cell --- passive resistor --- SAR ADC --- loop delay circuit --- Resistance-to-Period converter --- robust read-out circuits --- ratiometric technique --- Fresnel lens --- wingbeat --- insects --- optoelectronics --- bees --- wasps --- fruit flies --- e-traps --- analog-to-digital converter --- successive approximation register --- direct sampling --- time-interleaved --- channel-selection-embedded bootstrap --- segmented pre-quantization and bypass --- LVDS --- high-speed serial interface --- transmitter --- receiver --- low-power --- image fusion --- multi-sensor fusion --- night vision --- hierarchical heterogeneous multi-DAG workflow --- multigroup scan --- ultrasonic phased array --- heterogeneous earliest finish time --- resolver --- discrete wavelet transform --- singular value decomposition --- automatic calibration --- noise reduction --- ripple voltage measurement --- DAC --- comparator --- peak-ripple estimation --- binary search --- low-cost --- secret image sharing --- digital image --- n-out-of-n scheme --- color palette --- colluder attack --- image restoration --- impulse noise --- ADMM --- HOCTVL1 --- spatially adapted regularization parameter --- rod electrode --- electrostatic induction --- method of images --- induced charge --- induced current --- 3D-IC design --- NILT --- TSV noise coupling --- RDL --- chain matrix --- interconnect line --- n/a

Listing 1 - 7 of 7
Sort by