Article
Materials Science, Multidisciplinary
Nan Zhang, Yi-fei Xu, Miao-hui Wang, Xiao-dong Hou, Bo-rui Du, Xue-yuan Ge, Hua Shi, Xu Xie
Summary: The study prepared M2 high speed steel coating on a 42CrMo steel substrate using ultra-high speed laser cladding technique. The results showed a dentate metallurgical bonding between the M2 cladded coating and the 42CrMo steel substrate. The morphology of the M2 coating varied from corn shape at the interface to column shape in the middle zone and a basket shape near the surface. The near-surface zone of the M2 coating consisted of residual austenite, lamellar twinning martensite, and network carbides.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Coatings & Films
Weimin Guo, Xiaoqiang Li, Ning Ding, Guoqiang Liu, Jianqun He, Linan Tian, Lizong Chen, Fahmi Zairi
Summary: In this study, a Fe-based alloy coating was fabricated by laser cladding process and subjected to heat treatment. The microstructure, hardness, and tensile strength of the coating were analyzed before and after heat treatment. The results showed that the hardness decreased while the tensile strength increased after heat treatment.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Qiaofeng Bai, Changyao Ouyang, Chunjiang Zhao, Binhui Han, Yingliang Liu
Summary: The study used laser cladding technology to prepare an Fe-based alloy coating on a 27SiMn hydraulic support, and a turning treatment was applied to obtain samples from the upper and middle regions of the cladding layer. Through SEM, XRD, friction and wear tests, and microhardness analysis, the influence of microstructure, phase composition, hardness, and wear resistance in different areas of the cladding layer was investigated. The results showed differences in bcc phase content, metal compound content, hardness, and wear mechanisms between the upper and middle regions of the cladding layer.
Article
Materials Science, Ceramics
Hao-zheng Wang, Yan-hai Cheng, Jin-yong Yang, Xiu-bing Liang
Summary: An Fe-based amorphous coating was applied on the surface of H13 steel by preheating the base materials followed by laser cladding. The study showed that preheating temperature significantly affects the quality and properties of the cladding layer, with the best comprehensive performance achieved at 250 degrees C.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Hainan Wang, Yanhai Cheng, Ruwei Geng, Bo Wang, Yongxiong Chen, Xiubing Liang
Summary: High-speed laser cladding (HLC) technology reduces heat input to the substrate surface by changing the convergence point of the laser beam and powder stream. HLC coatings have faster cooling rates compared to conventional laser cladding (CLC), resulting in coatings with low dilution and high amorphous content. A study comparing Fe-based amorphous coatings deposited on AISI 1020 seamless steel tubes using CLC and HLC processes found that the HLC coating had a more uniform distribution of amorphous phases, smaller and denser microstructure, and better corrosion resistance than the CLC coating. The mechanical properties and corrosion resistance of the coatings improved with increasing amorphous phase content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Dariusz Bartkowski, Aneta Bartkowska, Peter Jurci
Summary: The study investigated the effect of different laser beam power values and powder feeding rates on properties of Fe/WC metal matrix composite coatings produced by laser cladding. Coatings produced at a powder feeding rate of 12.50 g/min showed the highest microhardness and corrosion resistance.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Qingkai Fan, Chao Chen, Chenglei Fan, Zeng Liu, Xiaoyu Cai, Sanbao Lin, Chunli Yang
Summary: Arc cladding high-entropy alloy (HEA) coatings have been prepared with low cost and flexibility, showing potential economic value in increasing the proportion of Fe element in HEA systems. The increase in Fe content leads to changes in phase structure and morphology, with higher Fe content exhibiting lower microhardness and more active creep deformation. The dual-phase (BCC + FCC) structure induces galvanic corrosion and negatively impacts corrosion properties.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Peilei Zhang, Qi Zhang, Hua Yan, Zhishui Yu, Jin Yang, Jieshi Chen, Di Wu, Haichuan Shi, Yingtao Tian, Songyun Ma, Weisheng Lei
Summary: In this research, an amorphous coating of Fe-Cr-Mo-C-B-Y metallic glass was developed on a steel substrate through laser surface treatment. The microstructure and phase distribution of the coating were analyzed, as well as its mechanical properties such as microhardness and abrasion resistance. The study found that the coating thickness, microstructure, and mechanical properties were influenced by the laser parameters used during the process.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Changyu Liu, Peng Xu, Chi Pang, Gangqiang Zha, Zhi Ouyang, Jianhua Chen
Summary: A Fe-Mn-Si shape memory alloy/nano-WC coating was prepared on the surface of 304 stainless steel by laser cladding, and its phase composition, microstructure, and properties were analyzed. The results showed that the coating exhibited high microhardness and excellent wear resistance due to the specific phase transformation process, with the addition of WC significantly increasing the microhardness and reducing the friction coefficient and wear loss.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
H. . F. Zhang, L. Wang, S. Zhang, C. . L. Wu, C. . H. Zhang, X. Y. Sun, J. Chen
Summary: In this paper, Fe-based composite coating modified with TiC ceramic particles was successfully fabricated on a 304 stainless steel substrate using laser cladding technique. The phase distribution, microstructure, microhardness, wear resistance, electrochemical performance, and cavitation corrosion resistance of the composite coating were systematically studied. The results showed that the addition of TiC particles refined the microstructure and improved the microhardness and cavitation corrosion resistance of the coating. The composite coating also exhibited superior electrochemical performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Optics
Ruifeng Li, Wuyan Yuan, Hangyu Yue, Yanyan Zhu
Summary: The Fe-Co-B-Si-Nb amorphous coatings were deposited on medium carbon steel under different scanning speeds by high-speed laser cladding technology. Results showed that higher scanning speeds led to smoother coatings, reduced residual stress, and improved thermal expansion coefficients. At a scanning speed of 80.38 m/min, the coating exhibited better performance with lower residual tensile stress.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Angang Wei, Yun Tang, Tong Tong, Fang Wan, Shaoshuai Yang, Kaiming Wang
Summary: As the core component of wind turbine transmission chain, wind power gears play a crucial role in ensuring the safe and efficient operation of the whole machine. Laser cladding technology is proposed for repairing and remanufacturing wind power gear spline shafts. The addition of tungsten carbide (WC) to laser-clad Fe-based coatings is found to improve the microhardness and wear resistance of the coatings. The wear mechanism of the coatings is mainly abrasive wear, accompanied by slight adhesion wear and oxidative wear.
Article
Materials Science, Multidisciplinary
Bowen Shi, Tao Li, Dong Wang, Xiaorui Zhang, Hongchao Zhang
Summary: This study investigates crack behavior and prevention of Ni60A coating by coaxial laser cladding. It found that nonuniform hard Cr-rich precipitates and large residual tensile stress are the main reasons for cracking, and thermal stress models were established to effectively reduce crack formation. Preheating the substrate can significantly decrease cracking rate, and a crack-free coating with higher microhardness can be achieved by adjusting process parameters.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Automation & Control Systems
Liaoyuan Chen, Yu Zhao, Chuang Guan, Tianbiao Yu
Summary: Adding CeO2 to ceramics reinforced Fe-based coatings can effectively reduce deposition defects, improve microstructure uniformity, microhardness, and wear resistance. The addition of CeO2 reduces cracks and porosities, enhances the bonding performance between the coating and substrate, promotes melting of ceramic particles, and refines the microstructure. The optimum addition of 2.5 wt.% CeO2 results in the highest and most uniform microhardness and smoother worn surface, despite a higher friction coefficient.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Hao Zhang, Yang Zhang, Qiang Cao, Yingjun Pan, Guofu Lian, Linzhi Que, Xingyu Zhu
Summary: Composite coatings were prepared using in situ synthesized NbC, WC, and TaC to enhance the microhardness and wear resistance of Mo2FeB2 coatings. The influence of different carbides on the morphology, microstructure, microhardness, residual stress, and tribological properties was investigated. The results showed different microstructural morphologies in the composite coatings, with the Mo2FeB2/WC composite coating exhibiting the lowest tensile stress and the best tribological properties. The wear mechanism of the Mo2FeB2/WC composite coating was only slight abrasive wear, which was mitigated by the formation of in situ synthesized NbC, WC, and TaC in the adhesive wear mechanism of the Mo2FeB2 coating.
CERAMICS INTERNATIONAL
(2023)
Article
Statistics & Probability
Canyi Chen, Liping Zhu
Summary: The study proposes a communication-efficient distributed estimation method for 1-bit compressive sensing. The results show that the method, which only requires gradient information to be communicated, can recover sparse signals quickly and accurately, and the experiments validate its effectiveness.
JOURNAL OF COMPUTATIONAL AND GRAPHICAL STATISTICS
(2023)
Article
Plant Sciences
Fei Wang, Tianxin Lu, Liping Zhu, Aiping Cao, Shuangquan Xie, Xifeng Chen, Haitao Shen, Quanliang Xie, Rong Li, Jianbo Zhu, Xiang Jin, Hongbin Li
Summary: In this study, the function and mechanism of multicopper oxidases GbAO and GbSKS in resistance to Verticillium wilt in cotton were analyzed. The upregulation of GbAO3A/D, GbSKS3A/D, and GbSKS16A/D genes after Verticillium dahliae treatment was observed, and their silencing reduced the resistance to Verticillium dahliae.
JOURNAL OF PLANT PHYSIOLOGY
(2023)
Article
Statistics & Probability
Wei Zhong, Chen Qian, Wanjun Liu, Liping Zhu, Runze Li
Summary: It is important to analyze the relationship between posted salary and job requirements in online labor markets using the online job advertisements data. The challenge lies in dealing with interval-valued salaries and selecting significant predictor skill words. To address this, a new feature screening method, ADD-SIS, is proposed, which utilizes nonparametric maximum likelihood estimation and interval information. This article also explores the important skill words for salaries in job advertisements for data scientists and data analysts in China. The importance of this article is 9 out of 10.
JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
(2023)
Article
Immunology
Hongqin Xu, Hongyan Li, Hailong You, Peng Zhang, Nan Li, Nan Jiang, Yang Cao, Ling Qin, Guixiang Qin, Hongbo Qu, Heyuan Wang, Bo Zou, Xia He, Dan Li, Huazhong Zhao, Gang Huang, Yang Li, Hefeng Zhang, Liping Zhu, Hongmei Qiao, Hongjun Li, Shurong Liu, Lina Gu, Guidong Yin, Ye Hu, Songbai Xu, Weiying Guo, Nanya Wang, Chaoying Liu, Pujun Gao, Jie Cao, Yang Zheng, Kaiyu Zhang, Yang Wang, Hui Chen, Jian Zhang, Dongmei Mu, Junqi Niu
Summary: In spring 2022, there was a rapid spread of the Omicron variant in Jilin Province, China. A study using real-world data showed that inactivated COVID-19 vaccines were effective in reducing the risk of pneumonia and severe disease. Booster vaccination further enhanced this protective effect.
EMERGING MICROBES & INFECTIONS
(2023)
Article
Automation & Control Systems
Yixuan Meng, Xiangyuan Wang, Wei-Wei Huang, Linlin Li, Chuxiong Hu, XinQuan Zhang, LiMin Zhu
Summary: In this article, an intelligent feedforward prediction and compensation scheme combined with a dual-loop high-bandwidth controller is proposed for high-speed and high-precision tracking controls of a nanopositioning stage. The dual-loop controller, consisting of an inner loop damping and an outer loop tracking controller, is developed with optimized parameters to provide a control bandwidth over the first resonant frequency of the stage. The effectiveness of the intelligent tracking error prediction method and the excellent performance of the control strategy for high-precision tracking of high-frequency reference trajectories are validated through experimental investigations on a self-made piezoelectric-actuated stage.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zong-Ying Li, Hong-Xia Zhang, Tian-Sheng He, Hong-Xin Jiang, Xiao-Wei Liu, Li-Na Zhu, Xiao-Zeng Li, De-Ming Kong
Summary: A water-stable Cd (II) luminescent coordination polymer (1) was obtained through assembly of a new ligand with CdCl2. This polymer can serve as a luminescent probe for the organoarsenic compound Roxarsine (ROX) with high selectivity and sensitivity. It can also detect some inorganic harmful ions with excellent versatility.
INORGANICA CHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Yao Chen, Yujin Chen, Dengming Ming, Liying Zhu, Ling Jiang
Summary: In this study, D-allulose accumulation from inulin was accelerated by combining D-allulose 3-epimerase, exo- and endo-inulinases with the NGTag/NGCatcher/CsgA system. Molecular dynamics simulations were used to select appropriate linkers for ENINU and the assembled fibers were successfully observed using fluorescent labelling. The assembled enzyme cascade (NGCatcher_ENINU_CsgA/NGTag_EXINU_CsgA/DAERK) achieved a D-allulose accumulation rate of 0.25 g/L min-1 (1.25 mgD-allulose mgDAERK -1 min -1) at an inulin concentration of 100 g/L. This system greatly improves the high-valued productions of rare sugars from cheap biomass.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Optics
Junxiao Wang, Zhenrong Liu, Liping Zhu, Zhen Song, Yan Zhang, Lei Zhang, Wanfei Zhang, Gang Wang, Zefu Ye, Zhujun Zhu, Wangbao Yin, Suotang Jia
Summary: This study investigates ways to weaken the self-absorption effect in plasma by theoretically simulating and experimentally verifying the radiation characteristics and self-absorption of laser-induced plasmas under different background gases. The results show that higher molecular weight and pressure of the background gas lead to an increase in plasma temperature and density, resulting in stronger species emission line intensity. To reduce the self-absorption effect, we can decrease gas pressure or use a background gas with a lower molecular weight. The research is crucial in selecting the appropriate background gas type and pressure, and doublets in self-absorption-free LIBS experiments.
Article
Nursing
Qian Tang, Dahua Zhang, Jianjun Chen, Meihua Liu, Yuqiong Xiang, Tingwei Luo, Lihui Zhu
Summary: The study aimed to develop a tool for measuring the core competencies of paediatric specialist nurses and assess its validity and reliability. It was conducted in mainland China in April 2022 with 302 paediatric specialist nurses. The scale was developed through a literature review, qualitative interview, and the Delphi method. The data were analyzed using descriptive statistics, t-test, factor analysis, correlation analysis, and reliability analysis. The final scale consisted of five factors and 32 items, with a high level of reliability and validity.
Article
Computer Science, Artificial Intelligence
Yuhong Hou, Edmond Q. Q. Wu, Zhengtao Cao, Xin Xu, Li-Min Zhu, Mengsun Yu
Summary: This work proposes a new spherical-orthogonal-symmetric Haar wavelet for decomposing and reconstructing spherical iris signals, aiming to obtain stronger geometric features of iris surface. The proposed wavelet is compared with spherical harmonics, semi-orthogonal, and nearly orthogonal spherical Haar wavelets in terms of feature extraction abilities. The results show that the developed spherical-orthogonal-symmetric Haar wavelet, when combined with a convolutional neural network, has a stronger iris recognition ability compared to the other wavelet bases.
IEEE TRANSACTIONS ON INTELLIGENT VEHICLES
(2023)
Review
Engineering, Manufacturing
Yijun Shen, Jieji Ren, Nuodi Huang, Yang Zhang, Xinquan Zhang, Limin Zhu
Summary: This paper provides a systematic review of existing research in the field of contact measurement. It introduces different configurations of measuring machines that may affect sampling and inspection path generation criteria. The entire inspection process is divided into pre-inspection and post-inspection stages, and typical methods for each sub-stage, including sampling, accessibility analysis, inspection path generation, probe tip radius compensation, surface reconstruction, and uncertainty analysis, are systematically overviewed and classified. Additionally, the paper presents the applications of deep learning in specific measurement tasks and suggests potential trends for future investigation.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Astronomy & Astrophysics
Fangbin Meng, Liying Zhu, Azizbek Matekov
Summary: We conducted the first multi-color light curves analysis of the eclipsing binary V2769 Ori. The photometric solution using the Wilson-Devinney method revealed that V2769 Ori is a deep, low-mass-ratio contact binary with a reliable contact degree and mass ratio. We constructed and analyzed the O-C diagram and found a long-term period decrease and a periodic oscillation. The period decrease can be attributed to mass transfer and angular momentum loss, while the periodic oscillation may be caused by the light-travel time effect.
Article
Materials Science, Ceramics
Chen Xinli, Li Yan, Wang Weisheng, Shi Zhiwen, Zhu Liqiang
Summary: Mimicking brain perceptual processing and using biocompatible and biodegradable materials in neuromorphic devices are both important for the design of bionic intelligent systems. In this study, a gelatin/carboxylated chitosan composite electrolyte film was used as the gate dielectric in oxide neuromorphic transistors, successfully mimicking synaptic plasticity. A quantitative processing method for tactile recognition based on spike number dependent synaptic plasticity was proposed, and an artificial neural network achieved a recognition accuracy of over 90% for MNIST handwritten digits. The results show that the proposed GEL/C-CS gated neuromorphic device has promising application potential in the design of bionic intelligent systems and brain-inspired neuromorphic systems.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Automation & Control Systems
Linlin Li, Xiangyuan Wang, Wei-Wei Huang, XinQuan Zhang, LiMin Zhu
Summary: This paper proposes a general parametric repetitive control (GPRC) method based on the IIR filter to address the limitations of repetitive control in terms of sensitivity to frequency shift and undesired gain amplification. By analyzing its sensitivity function, it is found that the design of GPRC can be converted to the explicit parametric design of an IIR high pass filter. Comparative experiments show that GPRC exhibits excellent robustness against frequency shift and advanced performance at the aperiodic frequencies.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Liying Zhu, Xinchun Yang, Jian-Ke Sun
Summary: A cage hybrid (C-Cage-PB) was developed by electrostatic complexation of a quaternary ammonium cage (C-Cage(+)) and an anionic inorganic Prussian blue (PB-). This hybrid can serve as a promising platform for the efficient removal of toxic compounds in wastewater through adsorption, delivery or catalytic degradation via a Fenton oxidation reaction, due to the unique synergy of its two components. Moreover, C-Cage-PB can encapsulate Pd clusters, which enhances its catalytic performance in the sequential degradation of toxic organic compounds and heavy metal pollution in wastewater treatment.
CHEMICAL COMMUNICATIONS
(2023)
