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information theoretic analysis --- multiplexing system --- HSI for biology --- point target detection --- digital elevation model --- neural networks --- oxygen saturation --- black polymers --- PZT --- blood detection --- multivariate analysis --- integral imaging --- hemispherical conical reflectance factor (HCRF) --- sprouting --- fluorescence --- multitemporal hyperspectral images --- plant phenotyping --- hyperspectral data mining and compression --- Raman --- medical imaging by HSI --- compressive detection --- stereo imaging --- image processing --- wound healing --- quality control --- lossless compression --- infrared hyperspectral imaging --- spectral tracking --- time series --- remote sensing --- diabetic foot ulcer --- classification --- Raman spectroscopy --- imaging --- fingerprints --- fusion --- wavelength selection --- Cramer–Rao lower bound --- three-dimensional imaging --- chemical imaging --- CS-MUSI --- total variation --- coastal dynamics --- forward observation model --- hyperspectral imaging --- fluorescence hyperspectral imaging --- age determination --- potatoes --- painting samples --- predictive coding --- hyperspectral --- video --- bi-directional reflectance distribution function (BRDF) --- optimal binary filters --- watercolours --- deep learning --- spectroscopy --- moving vehicle imaging --- sorting --- maximum likelihood --- multivariate data analysis --- interval partial least squares --- disease detection --- Raman hyperspectral imaging --- primordial leaf count --- machine learning --- spatial light modulators (SLM) --- Virginia Coast Reserve Long Term Ecological Research (VCR LTER) --- digital micromirror device (DMD) --- hyperspectral microscopy --- alternating direction method of multipliers --- statistical methods for HSI --- multiband image fusion --- digital light processor (DLP) --- linear mixture model --- retouching pigments --- liquid crystal --- principal component analysis --- Chemometrics --- compressive sensing --- PLSR --- Hyperspectral imaging
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Advances in nanotechnology have boosted the development of more efficient materials, with emerging sectors (electronics, energy, aerospace, etc.) demanding novel materials to fulfill the complex technical requirements of their products. This is the case of polymeric foams, which may display good structural properties alongside functional characteristics through a complex composition and (micro)structure in which a gas phase is combined with rigid ones, mainly based on nanoparticles, dispersed throughout the polymer matrix. In recent years, there has been an important impulse in the development of nanocomposite foams, extending the concept of nanocomposites to the field of cellular materials. This, alongside developments in new advanced foaming technologies which have allowed the generation of foams with micro, sub-micro, and even nanocellular structures, has extended the applications of more traditional foams in terms of weight reduction, damping, and thermal and/or acoustic insulation to novel possibilities, such as electromagnetic interference (EMI) shielding. This Special Issue, which consists of a total of 22 articles, including one review article written by research groups of experts in the field, considers recent research on novel polymer-based foams in all their aspects: design, composition, processing and fabrication, microstructure, characterization and analysis, applications and service behavior, recycling and reuse, etc.
graphene oxide --- n/a --- microstructure --- multi-objective particle swarm optimization --- electromagnetic wave absorption --- polyamide --- lignin --- expandable microspheres --- surfactants --- aluminum microfibers --- biomaterials --- permittivity --- compression properties --- shock compression --- syntactic foams --- 1 --- impact wedge–peel test --- phenolic foams --- 3 --- foam extrusion --- energy conservation --- heat transfer --- heterogeneous nucleation --- polyurethane foam --- leaching test --- functional --- cellulose foam --- impact property --- foam injection molding --- itaconic acid --- composites --- foaming quality --- phosphorus flame retardants --- polymer waste --- metallic tube --- 5-benzene-trisamides --- polyurethane foam composites --- polyetherimide foams --- scCO2 --- Ethylene Propylene Diene Monomer --- thermal conductivity --- ethyl cellulose --- super critical CO2 --- thermal insulation --- cell nucleation --- crystalline --- polypropylene --- PZT --- burning characteristic --- foams --- quasi-static compression tests --- flame-retardant ABS microcellular foams --- nanotubes --- conductivity --- energy absorption capability --- intrinsic toughness --- ternary synergistic effect --- multilayers --- absorbent PMI foam --- semi-rigid polyurethane foams --- phosphorus --- EMI --- supramolecular additives --- MuCell® injection-molding foaming --- piezocomposite --- ultrasonication --- scCO2 foaming --- automobile structural adhesives --- thermogravimetric analysis --- rigid polyurethane foam --- failure mechanism --- mechanical properties --- multifunctional foams --- SANS --- fluoelastomer --- sound absorption coefficient --- acoustic performances --- functional foam --- foam morphology --- mechanical property --- polystyrene foams --- piezoelectric --- graphene --- Pluronic --- epoxy composite foam adhesive --- polymers --- flame retardancy --- core–shell rubber --- extrusion foaming --- equation of state --- cellulose nanofiber --- epoxy --- DOPO --- PUR --- grey relational analysis --- activation energies --- adjacent façade --- electrical conductivity --- impact wedge-peel test --- core-shell rubber --- adjacent façade
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Advances in miniaturization of sensors, actuators, and smart systems are receiving substantial industrial attention, and a wide variety of transducers are commercially available or with high potential to impact emerging markets. Substituting existing products based on bulk materials, in fields such as automotive, environment, food, robotics, medicine, biotechnology, communications, and other technologies, with reduced size, lower cost, and higher performance, is now possible, with potential for manufacturing using advanced silicon integrated circuits technology or alternative additive techniques from the mili- to the nano-scale. In this Special Issue, which is focused on piezoelectric transducers, a wide range of topics are covered, including the design, fabrication, characterization, packaging, and system integration or final applications of mili/micro/nano-electro-mechanical systems based transducers.
History of engineering & technology --- cylindrical composite --- piezoceramic/epoxy composite --- electromechanical characteristics --- transducer --- piezoelectric actuators --- positioning --- trajectory control --- numerical analysis --- trajectory planning --- square piezoelectric vibrator --- resonance --- piezoelectric diaphragm pump --- flexible support --- piezoelectric resonance pump --- piezoelectric ceramics actuators --- hysteresis modeling --- Bouc-Wen model --- P-type IL --- MFA control --- SM control --- evidence theory --- active vibration control --- piezoelectric smart structure --- piezoelectric material --- multiphysics simulation --- finite element method (FEM) --- fluid-structure interaction (FSI) --- micro electromechanical systems (MEMS) --- traveling waves --- piezoelectric --- microactuator --- MEMS --- piezoelectric current sensing device --- two-wire power cord --- cymbal structure --- force amplification effect --- sensitivity --- ciliary bodies touch beam --- piezoelectric tactile feedback devices --- anisotropic vibration tactile model --- human factor experiment --- nondestructive testing --- maturity method --- concrete early-age strength --- SmartRock --- ultrasonic waves --- PZT (piezoelectric) sensors --- structural health monitoring --- AlN thin film --- piezoelectric effect --- resonant accelerometer --- z-axis --- debonding --- non-destructive testing --- electromechanical impedance --- damage detection --- impedance-based technique --- damage depth --- piezoelectric vibration energy harvester --- frequency up-conversion mechanism --- impact --- PZT thick film --- piezoelectric ceramic materials --- Duhem model --- hysteresis model --- class-C power amplifier --- diode expander --- piezoelectric transducers --- point-of-care ultrasound systems --- transverse impact --- frequency up-conversion --- piezoelectric bimorph --- human-limb motion --- hybrid energy harvester --- cascade-connected transducer --- low frequency --- small size --- finite element --- acoustic telemetry --- measurement while drilling --- energy harvesting --- pipelines --- underwater networks --- wireless sensor networks --- control algorithm --- waterproof --- coating --- reliability --- flexible micro-devices --- aqueous environments --- seawater --- capacitive pressure sensors --- in-situ pressure sensing --- sensor characterization --- physiological applications --- cardiac output --- aluminum nitride --- resonator --- damping --- quality factor --- electromechanical coupling --- implantable middle ear hearing device --- piezoelectric transducer --- stimulating site --- finite element analysis --- hearing compensation --- adaptive lens --- piezoelectric devices --- fluid-structure interaction --- moving mesh --- thermal expansion --- COMSOL --- petroleum acoustical-logging --- piezoelectric cylindrical-shell transducer --- center-frequency --- experimental-measurement --- piezoelectricity --- visual servo control --- stepping motor --- nano-positioner --- stick-slip --- piezoelectric energy harvester --- cut-in wind speed --- cut-out wind speed --- energy conservation method --- critical stress method --- piezoelectric actuator --- lever mechanism --- analytical model --- stick-slip frication --- nanopositioning stage --- piezoelectric hysteresis --- mark point recognition --- piecewise fitting --- compensation control --- piezo-electromagnetic coupling --- up-conversion --- vibration energy harvester --- multi-directional vibration --- low frequency vibration --- hysteresis compensation --- single-neuron adaptive control --- Hebb learning rules --- supervised learning --- vibration-based energy harvesting --- multimodal structures --- frequency tuning --- nonlinear resonator --- bistability --- magnetostatic force --- robot --- miniature --- traveling wave --- leg --- piezoelectric actuators (PEAs) --- asymmetric hysteresis --- Prandtl-Ishlinskii (PI) model --- polynomial-modified PI (PMPI) model --- feedforward hysteresis compensation --- PIN-PMN-PT --- 1-3 composite --- high frequency --- phased array --- cylindrical composite --- piezoceramic/epoxy composite --- electromechanical characteristics --- transducer --- piezoelectric actuators --- positioning --- trajectory control --- numerical analysis --- trajectory planning --- square piezoelectric vibrator --- resonance --- piezoelectric diaphragm pump --- flexible support --- piezoelectric resonance pump --- piezoelectric ceramics actuators --- hysteresis modeling --- Bouc-Wen model --- P-type IL --- MFA control --- SM control --- evidence theory --- active vibration control --- piezoelectric smart structure --- piezoelectric material --- multiphysics simulation --- finite element method (FEM) --- fluid-structure interaction (FSI) --- micro electromechanical systems (MEMS) --- traveling waves --- piezoelectric --- microactuator --- MEMS --- piezoelectric current sensing device --- two-wire power cord --- cymbal structure --- force amplification effect --- sensitivity --- ciliary bodies touch beam --- piezoelectric tactile feedback devices --- anisotropic vibration tactile model --- human factor experiment --- nondestructive testing --- maturity method --- concrete early-age strength --- SmartRock --- ultrasonic waves --- PZT (piezoelectric) sensors --- structural health monitoring --- AlN thin film --- piezoelectric effect --- resonant accelerometer --- z-axis --- debonding --- non-destructive testing --- electromechanical impedance --- damage detection --- impedance-based technique --- damage depth --- piezoelectric vibration energy harvester --- frequency up-conversion mechanism --- impact --- PZT thick film --- piezoelectric ceramic materials --- Duhem model --- hysteresis model --- class-C power amplifier --- diode expander --- piezoelectric transducers --- point-of-care ultrasound systems --- transverse impact --- frequency up-conversion --- piezoelectric bimorph --- human-limb motion --- hybrid energy harvester --- cascade-connected transducer --- low frequency --- small size --- finite element --- acoustic telemetry --- measurement while drilling --- energy harvesting --- pipelines --- underwater networks --- wireless sensor networks --- control algorithm --- waterproof --- coating --- reliability --- flexible micro-devices --- aqueous environments --- seawater --- capacitive pressure sensors --- in-situ pressure sensing --- sensor characterization --- physiological applications --- cardiac output --- aluminum nitride --- resonator --- damping --- quality factor --- electromechanical coupling --- implantable middle ear hearing device --- piezoelectric transducer --- stimulating site --- finite element analysis --- hearing compensation --- adaptive lens --- piezoelectric devices --- fluid-structure interaction --- moving mesh --- thermal expansion --- COMSOL --- petroleum acoustical-logging --- piezoelectric cylindrical-shell transducer --- center-frequency --- experimental-measurement --- piezoelectricity --- visual servo control --- stepping motor --- nano-positioner --- stick-slip --- piezoelectric energy harvester --- cut-in wind speed --- cut-out wind speed --- energy conservation method --- critical stress method --- piezoelectric actuator --- lever mechanism --- analytical model --- stick-slip frication --- nanopositioning stage --- piezoelectric hysteresis --- mark point recognition --- piecewise fitting --- compensation control --- piezo-electromagnetic coupling --- up-conversion --- vibration energy harvester --- multi-directional vibration --- low frequency vibration --- hysteresis compensation --- single-neuron adaptive control --- Hebb learning rules --- supervised learning --- vibration-based energy harvesting --- multimodal structures --- frequency tuning --- nonlinear resonator --- bistability --- magnetostatic force --- robot --- miniature --- traveling wave --- leg --- piezoelectric actuators (PEAs) --- asymmetric hysteresis --- Prandtl-Ishlinskii (PI) model --- polynomial-modified PI (PMPI) model --- feedforward hysteresis compensation --- PIN-PMN-PT --- 1-3 composite --- high frequency --- phased array
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