A5100348822- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Supercapacitor Materials and Fabrication
- Low-power high-performance VLSI design
- Smart Grid and Power Systems
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- VLSI and FPGA Design Techniques
- Integrated Energy Systems Optimization
- Model Reduction and Neural Networks
- Electric Power System Optimization
- Smart Grid Energy Management
- Advanced Power Generation Technologies
- Organic Light-Emitting Diodes Research
- Molecular Junctions and Nanostructures
- Laser Design and Applications
- Zeolite Catalysis and Synthesis
- Power Systems and Renewable Energy
- Surface and Thin Film Phenomena
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Power Systems and Technologies
Dalian University of Technology
2012-2025
Tsinghua University
2005-2024
Tsinghua–Berkeley Shenzhen Institute
2024
Key Laboratory of Nuclear Radiation and Nuclear Energy Technology
2023
Inner Mongolia Electric Power (China)
2022-2023
Dalian University
2012-2022
Institute of Electronics
2022
University of Toronto
2020-2022
Shenzhen Stock Exchange
2019
Health Alliance International
2019
Dopamine is an excellent and flexible agent for surface coating of inorganic nanoparticles contains unusually high concentrations amine groups. In this study, we demonstrate that through a controlled thin layer polydopamine on the α-Fe(2)O(3) in dopamine aqueous solution, followed by subsequent carbonization, N-doped carbon-encapsulated magnetite has been synthesized shows electrochemical performance as anode material lithium-ion batteries. Due to strong binding affinity iron oxide...
Abstract Novel multifunctional composites composed of highly dispersed nanosized Fe 2 O 3 particles, a tubular mesoporous carbon host, and conductive polypyrrole (PPy) sealing layer are hierarchically assembled via two facile processes, including bottom‐up introduction nanoparticles in carbons, followed by situ surface with the PPy coating. particles well‐dispersed within matrix is spatially selectively coated onto external pore entrances @C composite, thereby bridging composite together...
Porous carbon materials with large pore volume are crucial in loading insulated sulfur the purpose of achieving high performance for lithium-sulfur batteries. In our study, peapodlike mesoporous interconnected channels and (4.69 cm(3) g(-1)) was synthesized used as matrix to fabricate carbon/sulfur (C/S) composite which served attractive cathodes Systematic investigation C/S reveals that can hold a but suitable 84 wt %, is beneficial improving bulk density practical application. Such...
Traditional ZSM-5 zeolite with a microporous structure suffers from diffusion limitations for large molecules and poor accessibility to active centers, resulting in low catalytic activity rapid deactivation via coking. Herein, we designed prepared hollow cavity uniform mesopores the shell through one-step alkali treatment using mixed of tetrapropylammonium hydroxide (TPAOH) sodium carbonate (Na2CO3). The size could be controlled range 2–12 nm by simply changing concentration Na2CO3. effects...
Abstract An effective strategy is explored for the in situ generation of a Cu 2 S/tubular mesoporous carbon composite by exploiting charge–discharge processes S/C on copper‐foil current collector. By studying reaction mechanism, we discover that dissolved polysulfide ions (from pristine sulfur) and inserted Li + are firmly anchored copper released from foil, which forms insoluble x S intermediates mesopore channels matrix. Moreover, new electrochemically active gradually converted to final...
We present a quasi-common-path laser feedback interferometer based on frequency shifting and multiplexing. The uses two acousto-optic modulators to shift the of target-generated light by 2 Omega. A properly aligned mirror is inserted into path generate shifted Phase variations beams are simultaneously measured through heterodyne demodulation with different reference signals. Their subtraction accurately reflects target displacement. Under typical room conditions, system's short-period...
We present a microchip laser feedback interferometer with an optical path multiplier to enhance the resolution of traditional interferometers (LFI). The has unique device, i.e. diffusive reflector. As class B lasers have extremely high sensitivity feedback, reflector can easily reflect or diffuse back beam without much manual adjustment system, which ensures system's easy-adjustment and practical feature. is two-mirror system enables between two mirrors by N times. When target shifts...
We present three Cr 3+ :Colquiriite lasers as low-cost alternatives to Ti:Sapphire laser technology.Single-mode diodes, which cost only $150 each, were used pump sources.In cw operation, with ∼520 mW of absorbed power, up 257, 269 and 266 output power slope efficiencies 53%, 62% 54% demonstrated for Cr:LiSAF, Cr:LiSGaF Cr:LiCAF, respectively.Record tuning ranges from 782 1042 nm 777 977 Cr:LiSGaF, 754 871 Cr:LiCAF demonstrated.In mode-locking experiments using semiconductor saturable...
We report a kinetic Monte Carlo (kMC) investigation of an atomistic model for 3-dimensional structural configurations TiO2 memristor, focusing on the oxygen vacancy migration and interaction under external voltage bias. kMC allows access experimental time scales so that formation well defined filaments in thin films can be simulated. The results show electric field drives migration; hopping-induced localized plays key role filament evolution. Using structure at different stages process,...
The timing jitter of optical pulse trains from diode-pumped, semiconductor saturable absorber mode-locked femtosecond Cr:LiSAF lasers is characterized by a single-crystal balanced cross-correlator with an equivalent sensitivity in phase noise -235 dBc/Hz. RMS 30 attoseconds integrated 10 kHz to 50 MHz, the Nyquist frequency 100 MHz repetition rate oscillator. AM-to-PM conversion induced excess calculated and compared experiment. self-steepening effect proven be dominant coupling mechanism,...
We report a single-mode diode-pumped, passively mode-locked Cr:LiSAF laser with gigahertz (GHz) repetition rate and kilowatt peak power. A low-loss saturable Bragg reflector low modulation depth optimized dispersion compensation mirrors enables the generation of stable, cw mode-locked, sub-100-fs pulses at 1 GHz around 865 nm when pumping four or six diodes. Using 0.25% output coupler total absorbed pump power 0.9 W from diodes, 55 fs, 110 pJ are produced. This corresponds to 1.8 kW power,...
We present a detailed experimental study of femtosecond tuning with Cr:LiSAF and Cr:LiCAF gain media using Al0.95Ga0.05As/Al0.17Ga0.83As-based saturable Bragg reflectors. In the experiments media, ranges 803–831 nm (28 nm), 828–873 (45 nm) 890–923 (33 were demonstrated three different reflectors reflectivity bands centered at around 800, 850, 910 nm, respectively. With medium, range 767–817 (50 was 800 reflector. Pulses as short 26 fs 39 have been obtained, which we believe are shortest...
A near-resonant excitation strategy is proposed and implemented in a 4-µm-thick GaN microcavity to realize an exciton-polariton condensate/lasing with low threshold. Strong exciton-photon coupling demonstrated, polariton lasing realized ultra-low threshold power density of about 13.3 W/cm
We report on an improved scheme of quasi-common-path microchip laser feedback interferometry, which demonstrates a high stability and accuracy. An additional beam splitter is used to divide the external cavity into measuring reference cavity. With this scheme, optical path lengths light can be made nearly same, thus greatly reducing long-period phase fluctuation caused by frequency drift. The final system performances are evaluated as followed: short-term displacement resolution better than...
For a resonant tunneling structure, it was found experimentally that the shot noise is super-Poissonian in negative differential region (NDR). From semiclassical analysis, believed behavior due to fluctuation of Coulomb interaction. Although there are many studies on mesocopic or nanoscale systems, an accounting by first-principles quantum transport theory for NDR still lacking. In this paper, we develop theoretical formalism investigate contribution fluctuations interaction noise, based...
This paper introduces a dual-mode controller for multi-level flying capacitor (ML-FC) converters that provides theoretically minimum possible voltage deviation (absolute minimum), seamless mode transitions, and size reduction. These advantages are obtained by introducing switching state is not utilized during regular converter operation the development of simple peak/valley current matching technique. The effectiveness verified with 3.3 V, 15 W, 400 kHz frequency (800 ripple frequency)...
This paper investigates a new architecture-level thermal characterization problem from behavioral modeling perspective to address the emerging related analysis and optimization problems for high-performance multicore microprocessor design. We propose approach, called <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ThermPOF</i> , build models measured or simulated power information at architecture level. first builds model using generalized...
In this paper, we investigate a new architecture-level thermal characterization problem from behavioral modeling perspective to address the emerging related analysis and optimization problems for high-performance multi-core microprocessor design. We propose approach, called ThermPOF, build models measured architecture power information. ThermPOF first builds model using generalized pencil-of-function (GPOF) method. And then effectively transient temperature changes, proposed two schemes...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text U. Demirbas, A. Benedick, Sennaroglu, D. Li, J. Kim, G. Fujimoto, and F. X. Kärtner, "Attosecond resolution timing jitter characterization of diode pumped femtosecond Cr:LiSAF lasers," in Conference Lasers Electro-Optics 2010, OSA Technical Digest (CD) (Optical Society America, 2010), paper CTuDD6. Export BibTex Endnote (RIS) HTML Plain alert Save article
In nuclear reactor engineering, doubling time is generally applied to indicate the change of power level and usually provided by a instrumentation system (NIS). digital NIS, current signal from neutron detector pre-amplified conditioned into voltage which proportional reactor, then acquired processed computer in NIS. The measurement noise contained will cause lot uncertainty calculation result. this paper, sensitivity analysis investigated. A algorithm for NIS proposed based on FIR Filtering...