A5101980060- Complex Network Analysis Techniques
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Opinion Dynamics and Social Influence
- Laser Design and Applications
- Transportation Planning and Optimization
- Complex Systems and Time Series Analysis
- Photorefractive and Nonlinear Optics
- Traffic control and management
- Human Mobility and Location-Based Analysis
- Railway Engineering and Dynamics
- Urban Design and Spatial Analysis
- Peer-to-Peer Network Technologies
- Innovative concrete reinforcement materials
- Advanced Optical Network Technologies
- Concrete and Cement Materials Research
- Data Management and Algorithms
- Photonic Crystal and Fiber Optics
- Railway Systems and Energy Efficiency
- Advanced Graph Neural Networks
- Ocular and Laser Science Research
- Regional Economics and Spatial Analysis
- Nanomaterials and Printing Technologies
- Urban Transport and Accessibility
- Fiber-reinforced polymer composites
Changchun University of Technology
2025
Materials Processing (United States)
2025
Wuhan National Laboratory for Optoelectronics
2024
Huazhong University of Science and Technology
2006-2024
Tianjin Normal University
2024
Research Institute of Petroleum Exploration and Development
2024
Hangzhou City University
2024
BOE Technology Group (China)
2024
Guangzhou Automobile Group (China)
2024
Beijing Jiaotong University
2011-2023
Social media, regarded as two-layer networks consisting of users and items, turn out to be the most important channels for access massive information in era Web 2.0. The dynamics human activity item popularity is a crucial issue social media networks. In this paper, by analyzing growth user four empirical networks, i.e., Amazon, Flickr, Delicious Wikipedia, it found that cross links between items are more likely created active acquired popular where measured number associated with items....
Significance With the same static road network, it is essentially unknown for urban traffic if flows have spatial organization properties different hours. Based on real-time high-resolution GPS data city scale, our results indicate two distinct modes characterized by percolation critical exponents. The mode during rush hours working days behaves like a 2D lattice with mainly short-range links, while other instants small world (i.e., long-range links). difference between these explained here...
Wearable solar charging technologies are evolving rapidly. Nevertheless, insufficient overall efficiency and poor compatibility remain daunting challenges. Here, a unit integrating GaAs cell Zn battery is reported.
Recent advances on human dynamics have focused the normal patterns of activities, with quantitative understanding behavior under extreme events remaining a crucial missing chapter. This has wide array potential applications, ranging from emergency response and detection to traffic control management. Previous studies shown that communications are both temporally spatially localized following onset emergencies, indicating social propagation is primary means propagate situational awareness. We...
Quzhou Fructus Aurantii (QFA) is the dried immature fruit of Rutaceae plant Citrus changshanhuyou Y. B. Chang (CSHY). In this study, six flavonoids including narirutin, naringin, hesperidin, neohesperidin, nobiletin, tangeretin were obtained by ultrasonic-assisted extraction. Subsequently, nine types natural deep eutectic solvents (NaDESs) systematically screened and evaluated extraction yields determined high-performance liquid chromatography (HPLC). Based on single factor experiment,...
Ceramic nanofibrous aerogels exhibit ultralow density and thermal conductivity, which make them ideal candidates for protection in extreme environments. However, the current limitations pore-forming techniques hinder their further advancement. In this study, ultralight, highly elastic, high-temperature-resistant ceramic were successfully prepared through direct foaming method using flexible Al2O3–SiO2–B2O3 nanofibers as raw materials Tween 80 agent. Foams generated slurry exhibited...
Electron beam lithography uses an accelerated electron to fabricate patterning on electron-beam-sensitive resist but requires complex dry etching or lift-off processes transfer the pattern substrate film substrate. In this study, etching-free is developed directly write a of various materials in all-water processes, achieving desired semiconductor nanopatterns silicon wafer. Introduced sugars are copolymerized with metal ions-coordinated polyethylenimine under action beams. The process and...
A diode-pumped, actively Q-switched dual-wavelength laser employing Nd:YVO4 self-Raman emission at 1524 nm and undoped GdVO4 Raman 1522 is demonstrated. With a pump power of 21.5 W pulse repetition frequency 20 kHz, maximum output 1.62 was obtained, comprising 0.54 W, component 1.08 component. The corresponding width 5.6 ns. experimental results indicate that this laser, with quite small wavelength separation, effective by virtue simultaneous shifts.
A simple composite cavity structure Er³⁺-doped fiber laser was proposed and demonstrated experimentally. The resonant consists of a pair uniform Bragg gratings (FBGs) π-phase shifted FBG. By introducing the FBG into as selective wavelength component, it can increase effective length suppress multi-longitudinal modes simultaneously. narrow linewidth 900 Hz low RIN -95 dB/Hz were obtained. And lasing rather stable with pump power changing. SMRS more than 67 dB. results show that has good...
A new surface engineering approach that allows for enhanced control over ligands by decoupling colloidal-stabilization and property-engineering was developed.
Crack propagation produced by frost heave affects the durability of slab-track structures in high-humidity and cold regions China. This work is intended to reveal evolution laws frost-heave crack propagation, establish evaluation criteria for investigate factors involved propagation. Firstly, preparing specimens with initial cracks, an experiment was designed. The process carried out means digital image correlation (DIC) technology acoustic emission (AE) technology, respectively. These...
The development of Econophysics is studied from the perspective scientific communication networks. Papers in published 1992 to 2003 are collected. Then a weighted and directed network communication, including collaboration, citation personal discussion, constructed. Its static geometrical properties, degree distribution, weight per degree, betweenness centrality, give nice overall description research works. way we introduced here measure connections can be used as general one construct network.
Minimum box-covering method is a basic tool to measure fractal dimension of network but unfortunately belongs family $NP$-hard problems. Finding more accurate approximation in relative shorter time an important problem and attracts considerable attention. In this paper, the accuracy ball-covering approach for measured by error $\ensuremath{\eta}$ true dimension, its upper bound $\ensuremath{\epsilon}$ analytically deduced linear least-squares method. When algorithm applied real-world...
1st-Stokes and 2nd-Stokes dual-wavelength operation within a diode-side-pumped Q-switched Nd:YAG/BaWO(4) intracavity Raman laser was realized. Using an output coupler of transmission 3.9% at 1180 nm 60.08% 1325 nm, the maximum power 8.30 W 2.84 pulse repetition rate 15 kHz for 1st Stokes 2nd were obtained, respectively. The corresponding optical conversion efficiency from diode to are 5.0% 1.4%, With pump 209 kHz, widths 20.5 ns 5.8 ns, stable simultaneous Q-switching mode locking without...
We report on a diode-pumped Nd:YAG ceramic laser operating at 1442.8 nm for the first time. In our experiment, two different ceramics with Nd-doped concentrations of 1.0 and 0.6 at. % concentration were used as gain mediums, respectively. At pump power 20.7 W, maximum output up to 3.96 W optical-to-optical efficiency 19.1% was obtained by using medium. To best knowledge, this is highest LD-pumped 1.44 μm crystal laser.
Global degree/strength based preferential attachment is widely used as an evolution mechanism of networks. But it hard to believe that any individual can get global information and shape the network architecture on it. In this paper, found emerges from local interaction models, including distance-dependent (DDPA) evolving model weighted networks(M. Li et al, New Journal Physics 8 (2006) 72), acquaintance model(J. Davidsen Phys. Rev. Lett. 88 (2002) 128701) connecting nearest-neighbor(CNN)...
A 1123 nm ceramic Nd:YAG laser passively Q-switched by graphene grown on SiC wafer was demonstrated. With a pump power of 8.1 W, an average output 332 mW obtained, corresponding to optical-to-optical conversion efficiency 4.1% and slope 7.8%. The pulse width 875.7 ns with repetition rate 46.8 kHz.
To investigate the relationship between cyclist violation and waiting duration, red‐light running behavior of nonmotorized vehicles is examined at signalized intersections. Violation duration collected by video cameras it assigned as censored uncensored data to distinguish normal crossing running. A proportional hazard‐based model introduced, variables revealing personal characteristics traffic conditions are used describe effects internal external factors. Empirical results show that time...