Search

Your search keyword '"Liu hongliang"' showing total 3,178 results
Start Over Author "Liu hongliang"
3,178 results on '"Liu hongliang"'

1. Research on the Construction of Smart Teaching Mode with Artificial Intelligence Technology Facilitating Education Informatization in Colleges and Universities

Author

Yin Ying, Peng Hansheng, and Liu Hongliang

Subjects
artificial intelligence, e-gppe-c model, knowledge graph, learner profiling, structural equation modeling, 97b20, Mathematics, QA1-939
Abstract

Based on subject knowledge mapping, this paper dynamically collects learning data, portrays learners’ learning situations, and accurately regulates the learning process. Personalized learning path recommendations and learning communities are constructed through learner profiling and learning services. Secondly, structural equation modeling was used to hypothesize the three-level elements of the E-GPPE-C model. Finally, 103 college students in smart teaching classes were taken as research subjects, and the utility of the smart teaching model was analyzed separately through the steps of precondition validation and cross-lag model with random intercepts. The results show that the smart teaching model has β =0.286 for deep learning strategy, β =0.211 for the smart classroom, and β =0.20 for classroom participation, and they accurately indicate that smart teaching has a positive facilitating mechanism on the learning ability of college students. This study also provides a useful reference for the practice of smart teaching in various disciplines in colleges and universities.

Published
2024
Full Text
View/download PDF

2. Real-time image defect detection system of cloth digital printing machine

Author

Liu Hongliang

Subjects
digital printing, image processing, accelerating robust feature algorithm, difference algorithm, Technology
Abstract

In order to solve the surface defects such as white silk, spots and wrinkles in the process of digital printing, a surface defect detection system for printed fabrics based on accelerated robust feature algorithm was proposed. Image registration is mainly carried out through accelerated robust feature (SURF); bidirectional unique matching method is adopted to reduce mismatch points, achieve accurate image registration, and extract defect information through differential algorithm. The performance of the improved surfing algorithm is verified by using multiple images. The experimental results show that compared with the traditional template matching method, the detection accuracy of the system detection algorithm is 12% higher, and the average time is 42.81 ms shorter than the traditional template matching method. Experiments show that the improved surfing algorithm has short time and high precision. The system can meet the actual production needs. The new system can detect surface defects on printed fabrics with an accuracy of 98%. Conclusion: The algorithm has higher detection rate and faster detection speed, which can meet the needs of practical industrial applications.

Published
2023
Full Text
View/download PDF

3. 2D layered MSe2 (M = Hf, Ti and Zr) for compact lasers: nonlinear optical properties and GHz lasing

Author

Li Genglin, Du Wenhui, Sun Shuo, Lu Qingming, Chen Zhixiang, Liu Hongliang, Ma Yandong, Sun Xiaoli, Jia Yuechen, and Chen Feng

Subjects
saturable absorber, transition-metal dichalcogenides, ultrafast lasers, waveguide lasers, Physics, QC1-999
Abstract

Two-dimensional (2D) ternary transition-metal dichalcogenides (TMDCs) are of great research interest because their superior layer-dependent optical modulation properties. In this work, three different kinds of TMDC nanosheets, including hafnium diselenide (HfSe2), titanium diselenide (TiSe2) and zirconium diselenide (ZrSe2), are prepared by liquid phase exfoliation (LPE) technique. The high-quality material properties of these TMDC nanosheets are confirmed by Raman spectroscopy and X-ray diffraction analysis. Furthermore, the bandgap information of five-layer MSe2 has been investigated via utilizing density functional theory. The calculation results exhibit ultra-narrow bandgap structure (lower than 1.1 eV) for all these three materials, indicating that MSe2 is suitable for broadband photonic applications. By applying the fabricated MSe2 as saturable absorbers, high-performance Q-switched mode-locked laser operation has been realized. The laser gain media are Nd:GdVO4 cladding waveguides fabricated by femtosecond laser direct writing. As a result, the pulsed waveguide lasers are able to deliver approximately 6-GHz laser pulses with a signal-to-noise ratio of over 45 dB. The minimum pulse width is determined to be as short as 26 ps. The results demonstrated in this work exhibit the great potential of TMDCs and waveguide structures in applications of pulsed lasers with compact footprints.

Published
2022
Full Text
View/download PDF

4. Crystal structure and photochromism of 1-(2,5-dimethyl-3-thienyl)-2-[2-methyl-5-(benzaldoxime)-3-thienyl] perfluorocyclopentene, C23H17F6NOS2

Author

Wu Xiaoxiao, Liu Hongliang, Yang Yuping, and Pu Shouzhi

Subjects
1971544, Physics, QC1-999, Crystallography, QD901-999
Abstract

C23H17F6NOS2, triclinic, P1̄ (no. 2), a = 8.379(3) Å, b = 11.509(2) Å, c = 12.817(3) Å, α = 71.272(3)°, β = 81.342(4)°, γ = 77.553(3)°, V = 1138.7(5) Å3, Z = 2, Rgt(F) = 0.0489, wRref(F2) = 0.1296, T = 296(2) K.

Published
2020
Full Text
View/download PDF

7. Design and Experiment of Deep-position Grabbing Device of Tissue Culture Basket in Facility Agriculture

Author

Li Chen, Liu Juan, Liu Hongliang, and Ying Fuqiang

Subjects
Facility agriculture, Grabbing, Collision theory, Mechanical engineering and machinery, TJ1-1570
Abstract

For the problems such as shallow storage depth,low utilization rate and large amount of labor force required for the existing facility agricultural cultivation frame,a kind of facility agriculture deep-position grabbing device is designed. Through the establishment of three-dimensional model,the feasibility of the program is preliminary determined. Based on the contact dynamics model and the nonlinear continuous collision theory,the calculation method of the collision force during the grasping process is proposed. The dynamics modeling of the impact force between the claw and the object is carried out and the parameters of the handling device are optimized by ADAMS simulation. Finally,the experimental platform is established,the experiments show that the grabbing device can carry the tissue culture baskets on the cultivating rack,and get the optimized movement rule.

Published
2017
Full Text
View/download PDF

21. Experimental Analysis on Metal Friction Pairs for Symmetric Friction Connections

Author

Liu, Hongliang, Lin, Yuao, Jia, LiangJiu, Xiang, Ping, Zheng, Zheng, Editor-in-Chief, Xi, Zhiyu, Associate Editor, Gong, Siqian, Series Editor, Hong, Wei-Chiang, Series Editor, Mellal, Mohamed Arezki, Series Editor, Narayanan, Ramadas, Series Editor, Nguyen, Quang Ngoc, Series Editor, Ong, Hwai Chyuan, Series Editor, Sun, Zaicheng, Series Editor, Ullah, Sharif, Series Editor, Wu, Junwei, Series Editor, Zhang, Baochang, Series Editor, Zhang, Wei, Series Editor, Zhu, Quanxin, Series Editor, Zheng, Wei, Series Editor, Yuan, Bingxiang, editor, Bilgin, Hüseyin, editor, Luo, Qingzi, editor, and Han, Zejun, editor

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results