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过滤筛选
- 2019
- 7nm silicon node
- chip-package interaction
- laser assisted bonding
- quick temperature cycling test
- mass reflow
- embedded trace substrate
- hammer test
- Electronic Science and Technology
- MediaTek, Inc.
- JCET STATS ChipPAC Pte. Ltd.
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Construction of ultraviolet protection, thermal insulation, superhydrophobic and aromatic textile with Al-doped ZnO–embedded lemon microcapsule coatings
摘要： Multifunctional textiles combining ultraviolet protection, thermal insulation, superhydrophobic and aromatic performance were successfully prepared using an aluminum-doped zinc oxide (AZO)-embedded lemon microcapsule and SiO2 dual-layer coating. AZO-loaded lemon microcapsules with average diameter of 1.5 mm were obtained via interfacial polymerization. Results showed that the high concentration of the AZO-embedded lemon microcapsule contributed to enhancing the waterproof property, aromatic performance, and visible and near-infrared light transmittance. The lemon content was up to 2.789 mg/g (weight of essence:weight of fabric). The water contact angle was high at 153.35°, exhibiting an outstanding superhydrophobic performance. The light transmittance decreased as the amount of AZO-embedded lemon microcapsule increased. The ultraviolet protection factor value reached 88.78 when the dosage of the AZO-embedded lemon microcapsule was 6%. Given the above research results, the cotton fabric coated with the AZO-embedded lemon microcapsule and SiO2 dual-layer composite coating would have potential applications in the water/oil purification field and functional protective fabrics.
关键词： AZO-embedded lemon microcapsule,aromatic textile,superhydrophobic,thermal insulation,ultraviolet protection
更新于2025-09-19 17:15:36
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Comparison of Structural and Optical Properties for N-embedded Polycyclic and Non-embedded Cationic Phosphorescent Iridium(III) Complexes
摘要： We designed and synthesized N-embedded polycyclic based cationic Ir-NO and non-embedded complexes Ir-N and Ir-O. Single crystal structures indicate that the N-embedded polycyclic unit in Ir-NO exhibits certain planarity and induces interesting π-π-stackings between 2,2’-bipyridine moieties of one molecule and two polycyclic units of the other molecule, and their shortest intermolecular distances are both 3.24 ?, which results in a stronger structural distortion of 2,2’-bipyridine ligand with a larger torsion angel (12.70o) in comparison with those of Ir-N (5.51o) and Ir-O (8.11o). Unpredictably, both Ir-N and Ir-O show deep red emission in solution whereas Ir-NO exhibits no emission. However, all complexes show significant luminescence in their respective polystyrene (PS) films, and Ir-NO displays a longer emission lifetime than those of Ir-N and Ir-O. DFT calculations reveal that unusual ligand-to-metal charge transfer (3LMCT) excited state character can be found in Ir-NO and Ir-N, which is in contrast to metal-to-ligand charge transfer (3MLCT) excited state property in Ir-O.
关键词： iridium complexes,N-embedded polycyclic ligands,phosphorescent cationic,polystyrene films
更新于2025-09-19 17:15:36
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Scalable Hardware-Based On-Board Processing for Run-Time Adaptive Lossless Hyperspectral Compression
摘要： Hyperspectral data processing is a computationally intensive task that is usually performed in high-performance computing clusters. However, in remote sensing scenarios, where communications are expensive, a compression stage is required at the edge of data acquisition before transmitting information to ground stations for further processing. Moreover, hyperspectral image compressors need to meet minimum performance and energy-efficiency levels to cope with the real-time requirements imposed by the sensors and the available power budget. Hence, they are usually implemented as dedicated hardware accelerators in expensive space-grade electronic devices. In recent years though, these devices have started to coexist with low-cost commercial alternatives in which unconventional techniques, such as run-time hardware reconfiguration are evaluated within research-oriented space missions (e.g., CubeSats). In this paper, a run-time reconfigurable implementation of a low-complexity lossless hyperspectral compressor (i.e., CCSDS 123) on a commercial off-the-shelf device is presented. The proposed approach leverages an FPGA-based on-board processing architecture with a data-parallel execution model to transparently manage a configurable number of resource-efficient hardware cores, dynamically adapting both throughput and energy efficiency. The experimental results show that this solution is competitive when compared with the current state-of-the-art hyperspectral compressors and that the impact of the parallelization scheme on the compression rate is acceptable when considering the improvements in terms of performance and energy consumption. Moreover, scalability tests prove that run-time adaptation of the compression throughput and energy efficiency can be achieved by modifying the number of hardware accelerators, a feature that can be useful in space scenarios, where requirements change over time (e.g., communication bandwidth or power budget).
关键词： dynamic and partial reconfiguration,FPGAs,Data compression,high-performance embedded computing,on-board processing,hyperspectral images
更新于2025-09-19 17:15:36
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Multiple embedded eigenstates in nonlocal plasmonic nanostructures
摘要： Trapping light in open cavities is a long sought “holy grail” of nanophotonics. Plasmonic materials may offer a unique opportunity in this context, as they may fully suppress the radiation loss and enable the observation of spatially localized light states with an infinite lifetime in an open system. Here, we investigate how the spatial dispersion effects, e.g., caused by the electron-electron interactions in a metal, affect the trapped eigenstates. Heuristically, one may expect that the repulsive-type electron-electron interactions should act against light localization, and thereby that they should have a negative impact on the formation of the embedded eigenstates. Surprisingly, here we find that the nonlocality of the material response creates new degrees of freedom and relaxes the requirements for the observation of trapped light. In particular, a zero-permittivity condition is no longer mandatory and the same resonator shell can potentially suppress the radiation loss at multiple frequencies.
关键词： spatial dispersion,nonlocal plasmonic nanostructures,light trapping,embedded eigenstates
更新于2025-09-19 17:13:59
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[IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - TeraHertz Josephson Plasmonics: Controlling Supercurrents in Cuprates
摘要： Hannan introduced in 1964 an embedded element efficiency concept that explains the so-called element-gain paradox in antenna arrays, i.e., that the array gain always is smaller than the sum of the element gains. In the present letter, we show for the first time the usefulness of his approach by evaluating directivities and aperture efficiencies of an array of open-ended waveguides by commercial full-wave electromagnetic (EM) solvers for a large range of element spacing. The results show also that by using embedded element analysis, the realized gain of regular arrays actually becomes equal to the sum of the realized gains of the embedded elements. Thus, the embedded element efficiency is more practical to use in design and numerical analysis than the more commonly used active element pattern approach. We also show that the embedded element efficiency can be approximated by a simple formula when the element spacing is smaller than half-wavelength.
关键词： fundamental limitations,embedded element efficiency,Array antenna
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Sozopol, Bulgaria (2019.9.6-2019.9.8)] 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Computed tomography dataset analysis for stereotaxic neurosurgery navigation
摘要： First-ever 28 nm embedded split-gate MONOS (SG-MONOS) ?ash macros have been developed to increase memory capacity embedded in micro controller units and to improve performance over wide junction temperature range from C to 170 C as demanded strongly in automotive uses. Much attention has been paid to the degradation of the reliability characteristics along with the process shrinkage. Temperature-adjusted word-line overdrive scheme improves random read access frequency by 15% and realizes both of 6.4 GB/s read throughput by 200 MHz no-wait random access of code ?ash macros and more than ten times longer TDDB lifetime of WL drivers. Temperature-adaptive step pulse erase control (TASPEC) improves the TDDB lifetime of dielectric ?lms between metal interconnect layers by three times. TASPEC is particularly useful for a data ?ash macro with one million rewrite cycles. Source-side injection (SSI) program with negative back-bias voltage achieves 63% reduction of program pulse time and, consequently, realizes 2.0 MB/s write throughput of code ?ash macros. A spread spectrum clock generation and a clock phase shift technique are introduced for charge pump clock generation in order to suppress EMI noise due to high write throughput of code ?ash macros, and peak power of EMI noise is reduced by 19 dB.
关键词： high-temperature operation,time dependent dielectric breakdown,Automotive application,high reliability,spread spectrum clock generation,word-line over-drive,split-gate MONOS(SG-MONOS),embedded ?ash memory,Fast random read operation
更新于2025-09-19 17:13:59
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Design Concepts for the Integration of Electronic Components into Metal Laser-based Powder Bed Fusion Parts
摘要： Additive manufacturing (AM) stands out from other manufacturing processes because it enables covering the functionality of an assembly by one single component only. In order to further increase the functional density in AM parts, it is of interest to integrate sensors in metal components during the Laser-based Powder Bed Fusion manufacturing process. This paper presents design concepts that facilitate an automated integration process of electronic components by using specific and individual criteria. In consideration of an automated embedding process, a standardized solid is outlined to unify different sensor types in a design space.
关键词： design concepts,embedded electronics,laser-based powder bed fusion,additive manufacturing,sensor integration
更新于2025-09-19 17:13:59
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[IEEE 2020 International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE) - Moscow, Russia (2020.3.12-2020.3.14)] 2020 International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE) - Simulation of Solar Energy Photovoltaic Conversion
摘要： Cardiovascular diseases are projected to remain the single leading cause of death globally. Timely diagnosis and treatment of these diseases are crucial to prevent death and dangerous complications. One of the important tools in early diagnosis of arrhythmias is analysis of electrocardiograms (ECGs) obtained from ambulatory long-term recordings. The design of novel patch-type ECG recorders has increased the accessibility of these long-term recordings. In many applications, it is furthermore an advantage for these devices that the recorded ECGs can be analyzed automatically in real time. The purpose of this study was therefore to design a novel algorithm for automatic heart beat detection, and embed the algorithm in the CE marked ePatch heart monitor. The algorithm is based on a novel cascade of computationally ef?cient ?lters, optimized adaptive thresholding, and a re?ned search back mechanism. The design and optimization of the algorithm was performed on two different databases: The MIT-BIH arrhythmia database (Se = 99.90%, P+ = 99.87) and a private ePatch training database (Se = 99.88%, P+ = 99.37%). The of?ine validation was conducted on the European ST-T database (Se = 99.84%, P+ = 99.71%). Finally, a double-blinded validation of the embedded algorithm was conducted on a private ePatch validation database (Se = 99.91%, P+ = 99.79%). The algorithm was thus validated with high clinical performance on more than 300 ECG records from 189 different subjects with a high number of different abnormal beat morphologies. This demonstrates the strengths of the algorithm, and the potential for this embedded algorithm to improve the possibilities of early diagnosis and treatment of cardiovascular diseases.
关键词： ePatch ECG recorder,real-time ECG analysis,Automatic QRS complex detection,embedded ECG analysis,patch-type ECG recorder
更新于2025-09-19 17:13:59
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Accelerated Degradation Test Investigation for Life-time Performance Analysis of LED Luminaires
摘要： As it becomes increasingly apparent that 4G will not be able to meet the emerging demands of future mobile communication systems, the question what could make up a 5G system, what are the crucial challenges, and what are the key drivers is part of intensive, ongoing discussions. Partly due to the advent of compressive sensing, methods that can optimally exploit sparsity in signals have received tremendous attention in recent years. In this paper, we will describe a variety of scenarios in which signal sparsity arises naturally in 5G wireless systems. Signal sparsity and the associated rich collection of tools and algorithms will thus be a viable source for innovation in 5G wireless system design. We will also describe applications of this sparse signal processing paradigm in Multiple Input Multiple Output random access, cloud radio access networks, compressive channel-source network coding, and embedded security. We will also emphasize an important open problem that may arise in 5G system design, for which sparsity will potentially play a key role in their solution.
关键词： massive random access,cloud radio access networks,embedded security,Compressed sensing,source coding
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC) - Chongqing, China (2019.10.11-2019.10.13)] 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC) - Research on Laser Cavity Ring-down Spectroscopy Measurement for SF6 Decomposed Gases
摘要： As it becomes increasingly apparent that 4G will not be able to meet the emerging demands of future mobile communication systems, the question what could make up a 5G system, what are the crucial challenges, and what are the key drivers is part of intensive, ongoing discussions. Partly due to the advent of compressive sensing, methods that can optimally exploit sparsity in signals have received tremendous attention in recent years. In this paper, we will describe a variety of scenarios in which signal sparsity arises naturally in 5G wireless systems. Signal sparsity and the associated rich collection of tools and algorithms will thus be a viable source for innovation in 5G wireless system design. We will also describe applications of this sparse signal processing paradigm in Multiple Input Multiple Output random access, cloud radio access networks, compressive channel-source network coding, and embedded security. We will also emphasize an important open problem that may arise in 5G system design, for which sparsity will potentially play a key role in their solution.
关键词： massive random access,cloud radio access networks,embedded security,Compressed sensing,source coding
更新于2025-09-19 17:13:59