- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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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) - Nanocomposites Polymer/Gold Nanoparticles/Chlorin e6 for Antitumor Laser Medicine
摘要： Stained glass windows are designed to reveal their powerful artistry under diverse and time-varying lighting conditions; virtual relighting of stained glass, therefore, represents an exceptional tool for the appreciation of this age old art form. However, as opposed to most other artifacts, stained glass windows are extremely difficult if not impossible to analyze using controlled illumination because of their size and position. In this paper, we present novel methods built upon image based priors to perform virtual relighting of stained glass artwork by acquiring the actual light transport properties of a given artifact. In a preprocessing step, we build a material-dependent dictionary for light transport by studying the scattering properties of glass samples in a laboratory setup. We can now use the dictionary to recover a light transport matrix in two ways: under controlled illuminations the dictionary constitutes a sparsifying basis for a compressive sensing acquisition, while in the case of uncontrolled illuminations the dictionary is used to perform sparse regularization. The proposed basis preserves volume impurities and we show that the retrieved light transport matrix is heterogeneous, as in the case of real world objects. We present the rendering results of several stained glass artifacts, including the Rose Window of the Cathedral of Lausanne, digitized using the presented methods.
关键词： computational relighting,stained glass,recovery,Banded matrices,light transport,dictionary learning,sparse cultural artifacts
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Enabling ultrathin III-V solar cells using dual photonic crystals
摘要： This paper presents a significant change in current electric power grid response and recovery schemes by developing a framework for proactive recovery of electric power assets with the primary objective of resiliency enhancement. Within the proposed framework, which can potentially present the next generation decision-making tool for proactive recovery, several coordinated models will be developed including: 1) the outage models to indicate the impact of hurricanes on power system components; 2) a stochastic pre-hurricane crew mobilization model for managing resources before the event; and 3) a deterministic post-hurricane recovery model for managing resources after the event. Proposed models will be extended to ensure applicability to a variety of electric power grids with different technologies and regulatory issues. The theoretical and practical implications of the developed models will push the research frontier of proactive response and recovery schemes in electric power grids, while its flexibility will support application to a variety of infrastructures, in response to a wide range of extreme weather events and natural disasters.
关键词： resiliency,smart grid,recovery,restoration,Natural disaster
更新于2025-09-19 17:13:59
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[IEEE 2019 Winter Simulation Conference (WSC) - National Harbor, MD, USA (2019.12.8-2019.12.11)] 2019 Winter Simulation Conference (WSC) - On the Consequences of Un-Modeled Dynamics to the Optimality of Schedules in Clustered Photolithography Tools
摘要： This paper presents a signi?cant change in current electric power grid response and recovery schemes by developing a framework for proactive recovery of electric power assets with the primary objective of resiliency enhancement. Within the proposed framework, which can potentially present the next generation decision-making tool for proactive recovery, several coordinated models will be developed including: 1) the outage models to indicate the impact of hurricanes on power system components; 2) a stochastic pre-hurricane crew mobilization model for managing resources before the event; and 3) a deterministic post-hurricane recovery model for managing resources after the event. Proposed models will be extended to ensure applicability to a variety of electric power grids with different technologies and regulatory issues. The theoretical and practical implications of the developed models will push the research frontier of proactive response and recovery schemes in electric power grids, while its ?exibility will support application to a variety of infrastructures, in response to a wide range of extreme weather events and natural disasters.
关键词： recovery,smart grid,restoration,Natural disaster,resiliency
更新于2025-09-19 17:13:59
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Capacity Expansion based Network Failure Recovery with Genetic Algorithm
摘要： To overcome the network bottleneck when a failure occurs, a capacity expansion based recovery model is established, and is solved by genetic algorithm under link recovery and path recovery strategies, achieving the minimal network expansion cost.
关键词： Fault Recovery,Genetic Algorithm,Network Capacity Expansion,IP + optical
更新于2025-09-16 10:30:52
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Effect of recovery time of nonlinear absorber saturated losses on the soliton pulse structure in a fibre laser with different cavity lengths
摘要： Using numerical simulation methods, we have calculated the dependences of the pulse profile and spectrum of a ring fibre laser in the region of anomalous group velocity dispersion on the length of the laser cavity and the recovery time of the nonlinear absorber saturated losses. It is found that with increasing cavity length the laser pulse acquires a pedestal, the positions of its edges corresponding to the frequencies of the Kelly sidebands. It is shown that the finiteness of the recovery time of the saturable absorber leads to an asymmetry in the profile and spectrum of the laser pulse.
关键词： recovery time,saturable losses,Kelly sidebands,soliton fibre laser,nonlinear saturable absorber
更新于2025-09-16 10:30:52
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Techno-economic analysis of a modified concentrating photovoltaic/organic Rankine cycle system
摘要： The combination of concentrating photovoltaic (CPV) and organic Rankine cycle (ORC) systems not only leads to a reduction of photovoltaic (PV) operating temperature, but also leads to an additional electric power production. Increase in the temperature of the PV decreases its operating efficiency, while increases the ORC efficiency. Therefore, there is an optimum temperature in which the total electricity produced by the combined system will be maximum. In this study, a modified CPV/ORC system is simulated and the optimum operating temperature of the PV panel is determined for different PV efficiencies. The most striking result is that increase in the PV nominal efficiency will result in the selection of a lower temperature for the PV optimum temperature. The results indicate that for the PV panels with efficiencies of 10%, 14%, 18%, and 22% the PV optimum temperature are 145.0°C, 139.8, 132.3, and 121.2°C, respectively.
关键词： heat recovery,organic Rankine cycle,solar energy,Photovoltaics,PV
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - AlGaAs/InGaP MBE-grown heterostructures for 1.73eV Solar Cells With 18.7% Efficiency
摘要： In this paper, the energy recovery in microstrip passive circuits from the power losses into heat is studied. For this purpose, a thermoelectric generator (TEG) based on the Seebeck effect principle is used, which converts part of the power dissipated into heat to dc electrical power. A solution integrating the TEG with the microstrip circuit is proposed, and design guidelines in order to optimize the recovered power keeping a good isolation between the RF signal and the TEG system are provided. As will be shown, under moderate applied signal powers of just 1–5 W, the levels of recovered power in microstrip passive circuits can be notable. As a demonstrator circuit, an integration device formed by an embedded microstrip bandpass filter for WiMAX applications and a TEG is designed, fabricated, and characterized (thermal and electrically). Different scenarios are considered, depending on frequency and thermal loads. For an applied in-band CW input signal power of 2 W at 3.48 GHz, a recovered power of around 250 μW has been continuously supplied to the electrical load. Several aspects, such as efficiency and future improvements, are also discussed.
关键词： power applications,Average power handling capability (APHC),microwave devices,planar circuits,energy recovery,electro-thermal analysis,energy harvesting
更新于2025-09-16 10:30:52
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Double-Side Pumped Membrane External-Cavity Surface-Emitting Lasers (MECSELs): Towards a "Solid-State Laser"-Like Gain Pump Configuration
摘要： A traf?c matrix is generally used by several network management tasks in a data center network, such as traf?c engineering and anomaly detection. It gives a ?ow-level view of the network traf?c volume. Despite the explicit importance of the traf?c matrix, it is signi?cantly dif?cult to implement a large-scale measurement to build an absolute traf?c matrix. Generally, the traf?c matrix obtained by the operators is imperfect, i.e., some traf?c data may be lost. Hence, we focus on the problems of recovering these missing traf?c data in this paper. To recover these missing traf?c data, we propose the spatio-temporal Kronecker compressive sensing method, which draws on Kronecker compressive sensing. In our method, we account for the spatial and temporal properties of the traf?c matrix to construct a sparsifying basis that can sparsely represent the traf?c matrix. Simultaneously, we consider the low-rank property of the traf?c matrix and propose a novel recovery model. We ?nally assess the estimation error of the proposed method by recovering real traf?c.
关键词： network management,Kronecker compressive sensing,network measurement,matrix completion,Traf?c matrix recovery
更新于2025-09-16 10:30:52
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Interaction of photothermal graphene networks with polymer chains and laser-driven photo-actuation behavior of shape memory polyurethane/epoxy/epoxy-functionalized graphene oxide nanocomposites
摘要： This work demonstrates the fabrication and near infra-red laser-driven shape recovery actuation behavior of bisphenol A diglycidyl ether-functionalized graphene oxide (DGEBA-f-GO)-based polyurethane (PU)/epoxy nanocomposites. DGEBA-f-GO was synthesized as a photothermal filler by treating DGEBA with carboxylated GO in a two-step process. Homogeneously dispersed networks of the photothermal filler were engineered via covalent crosslinking between DGEBA and DGEBA-f-GO in the PU matrix. The crosslinked DGEBA-f-GO networks act as a near-infrared laser-harvesting framework for the efficient transfer of heat and trigger for shape recovery upon remote actuation. Interaction between the photo-thermal networks of DGEBA-f-GO with polymer chains was analyzed structurally, revealing that the DGEBA-f-GO networks in the nanocomposites stimulate the formation of an integrated netpoint framework in the matrix by interacting with the PU hard segment via hydrogen bonding. Consequently, the shape memory composites reinforced with GO networks showed enhanced laser-driven photo-actuation stress, as well as thermal stability, photothermal behavior, and mechanical properties.
关键词： Polyurethane,Shape recovery,Graphene oxide
更新于2025-09-12 10:27:22
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Eliminating Phase Drift for Distributed Optical Fiber Acoustic Sensing System with Empirical Mode Decomposition
摘要： Phase-drift elimination is crucial to vibration recovery in the coherent detection phase-sensitive optical time domain re?ectometry system. The phase drift drives the whole phase signal ?uctuation as a baseline, and its negative e?ect is obvious when the detection time is long. In this paper, empirical mode decomposition (EMD) is presented to extract and eliminate the phase drift adaptively. It decomposes the signal by utilizing the characteristic time scale of the data, and the baseline is eventually obtained. It is validated by theory and experiment that the phase drift deteriorates seriously when the length of the vibration region increases. In an experiment, the phase drift was eliminated under the conditions of di?erent vibration frequencies of 1 Hz, 5 Hz, and 10 Hz. The phase drift was also eliminated with di?erent vibration intensities. Furthermore, the linear relationship between phase and vibration intensity is demonstrated with a correlation coe?cient of 99.99%. The vibrations at 0.5 Hz and 0.3 Hz were detected with signal-to-noise ratios (SNRs) of 55.58 dB and 64.44 dB. With this method, when the vibration frequency is at the level of Hz or sub-Hz, the phase drift can be eliminated. This contributes to the detection and recovery of low-frequency perturbation events in practical applications.
关键词： phase drift elimination,phase recovery,phase-sensitive optical time domain re?ectometry,distributed acoustic sensing system,empirical mode decomposition
更新于2025-09-12 10:27:22