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Rare Metals 2024年第5期43卷 1999-2014页

作者： Mei Li jing-zhi wang zhi-Liang Jin School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan 750021China School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

In the process of photocatalytic water cracking,the migration rate and utilization rate of photogenerated charges determine the hydrogen evolution performance of the *** this paper,a carbon isotope superconducting material graphdiyne(GDY)is prepared by mechanical ball milling and introduced into the S-scheme heterojunction Zn_(0.5)Co_(0.5)S/MoS_(2)inorganic *** terms of hydrogen evolution kinetics,GDY acts as an electron bridge,not only accelerating the migration of photogenerated carriers but also improving the utilization of photogenerated ***,the large twodimensional layer provides more loading and anchoring points for Zn_(0.5)Co_(0.5)S/MoS_(2),which increases the number of active *** ternary composite catalyst 20%GDY/Zn_(0.5)Co_(0.5)S/MoS_(2)(20-GCSM)generates 69.94μmol of hydrogen(5 h)in triethanolamine *** is 2.97 and1.80 times higher than Zn_(0.5)Co_(0.5)S and Zn_(0.5)Co_(0.5)S/MoS_(2),*** the cyclic experiment,it still has stable hydrogen evolution performance after standing for24 h(under dark conditions).In addition,the potential mechanism of photocatalytic hydrogen evolution is demonstrated through in-situ X-ray photoelectron *** work provides a reference for further research in the field of introducing carbon materials into photocatalytic systems and improving the utilization of photogenerated charges.

关键词： Graphdiyne S-scheme heterojunction Electron transfer bridge Hydrogen production

Video Analysis Based on Volumetric Event Detection

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International Journal of Automation and computing 2010年第3期7卷 365-371页

作者： jing wang zhi-Jie Xu Department of Informatics School of Computing and Engineering University of Huddersfield Huddersfield HD1 3DH UK

During the past decade, feature extraction and knowledge acquisition based on video analysis have been extensively researched and tested on many applications such as closed-circuit television （CCTV） data analysis, large-scale public event control, and other daily security monitoring and surveillance operations with various degrees of success. However, since the actual video process is a multi-phased one and encompasses extensive theories and techniques ranging from fundamental image processing, computational geometry and graphics, and machine vision, to advanced artificial intelligence, pattern analysis, and even cognitive science, there are still many important problems to resolve before it can be widely applied. Among them, video event identification and detection are two prominent ones. Comparing with the most popular frame-to-frame processing mode of most of today＇s approaches and systems, this project reorganizes video data as a 3D volume structure that provides the hybrid spatial and temporal information in a unified space. This paper reports an innovative technique to transform original video frames to 3D volume structures denoted by spatial and temporal features. It then highlights the volume array structure in a so-called ＂pre-suspicion＂ mechanism for a later process. The focus of this report is the development of an effective and efficient voxel-based segmentation technique suitable to the volumetric nature of video events and ready for deployment in 3D clustering operations. The paper is concluded with a performance evaluation of the devised technique and discussion on the future work for accelerating the pre-processing of the original video data.

关键词： Spatio-temporal volume (STV) video processing volume feature extraction segmentation motion analysis.

Conversion of cadherin isoforms in cultured human gastriccarcinoma cells

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World Journal of Gastroenterology 2006年第6期12卷 966-970页

作者： Bing-jing wang zhi-Qian Zhang Yang Ke Beijing Institutefor Cancer Research and School of Oncology Peking UniversityBeijing 100034 China

AIM： To explore the expression of cadherin isoforms in cultured human gastric carcinoma cells and its regulation. METHODS： The expressions of cell adhesion molecules （including E-cadherin, N-cadherin, α-catenin, β-catenin） and cadherin transcription factors including snail, slug and twist were determined by reverse transcriptasepolymerase chain reaction（RT-PCR）, immunoblotting and immunofluorescence in SV40-immortalized human gastric cell line Ges-1 and human gastric cancer cell lines MGC-803, BGC-823 and SGC-7901. RESULTS： All cell lines expressed N-cadherin, but not E-cadherin. N-cadherin immunofluorescence was detected at cell membranous adherents junctions where co-localization with immunofluorescent staining of inner surface adhesion proteins α- and β-catenins was observed. The transformed Ges-1 and gastric cancer cell lines all expressed transcription factors （snail, slug and twist） which inhibited the expression of E-cadherin and triggered epithelial-mesenchymal transformation. CONCLUSION： Cadherin isoforms can change from E-cadherin to N-cadherin in transformed human gastric cancer cells, which is associated with intracellular events of stomach carcinogenesis and high expression of corresponding transcription factors.

关键词： E-cadherin N-cadherin Transcription factor Gastric cancer

A microarray analysis of early activated pathways in concanavalin A-induced hepatitis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第5期11卷 366-377页

作者： Qing-yi CAO Feng CHEN Jie LI Shan-shan WU jing wang zhi CHEN State Key Laboratory for Diagnosis and Treatment of Infectious Diseases the First Affiliated Hospital School ofl Medicine Zhejiang University Hangzhou 310003 China

Objective:To explore the mechanisms of fulminant hepatitis(FH) in the early stages,and to determine the critical pathways in its initiation and ***:Twelve BALB/c mice were divided into four groups:one group left as negative control and sacrificed immediately after injection of phosphate-buffered saline(PBS),and another three groups with concanavalin A(Con A) administration sacrificed at 1,3,and 6 h after *** GeneChip Mouse 430 2.0 Array was employed to evaluate the expression profile of each of the 12 *** analysis was done on the microarray data to extract the genes that were differentially *** analysis was carried out to determine relevant pathways within which regulated genes were significantly ***:A total of 393,8354 and 11 344 differentially expressed genes were found,respectively,at three time *** 0-1 h and 1-3 h,most of the pathways enriched with regulated genes were related to immune response and inflammation,among which Toll-like receptor(TLR) signaling and mitogen-activated protein kinase(MAPK) signaling appeared during both phases,while cytokine-cytokine receptor interaction,apoptosis,T cell receptor signaling,and natural killer(NK) cell-mediated cytotoxicity pathways emerged during the second *** found to be significant during 3-6 h were mostly related to metabolic ***:The TLR signaling pathway dominates the early responses of Con A-induced FH in *** stimulates the production of type I cytokines,therefore recruiting and activating T/NK *** T/NK cells exert their cytotoxicity on hepatocytes through inducing death receptorintermediated apoptosis,resulting in liver injury.

关键词： Concanavalin A Fulminant hepatitis Microarray Expression profile Pathway analysis

Enantioselective synthesis of 2-amino-3-nitrile-chromenes catalyzed by cinchona alkaloids:A remarkable additive effect

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Chinese Chemical Letters 2016年第1期27卷 25-30页

作者： Yuan-Qin Zheng Chun-Feng Luan zhi-jing wang Yong-Qi Yao zhi-Chuan Shi Xue-Feng Li zhi-Gang Zhao Feng Chen College of Chemistry and Environment Protection Engineering Southwest University for Nationalities Chengdu 610041China

2-Amino-3-nitrile-chromenes with potential antitumor activity were constructed by a novel catalytic system. In combination with a-naphthol, quinine could effectively promote the Michael-cyclization process of malononitrile with functionalized chalcones in high yields and moderate to good enantioselectivity（up to 84% ee）. It is notable that the enantioselectivity could be greatly improved when a-naphthol was employed as additive.

关键词： Additive effect 2-Amino-3-nitrile-chromene Functionalized chalcones Enantioselective

Spectroscopic and temperature sensing properties of Sm3+ in self-activated CsLu（WO4）2 phosphors

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Journal of Rare Earths 2024年第11期42卷 2033-2042页

作者： Mingjun Song jing wang zhi Xie Li Liu wang Zhao Weiwei Zhou School of Chemistry Chemical and Environmental EngineeringWeifang University College of Mechanical and Electrical Engineering Fujian Agriculture and Forestry University School of Chemistry and Materials Engineering Huainan Normal University

In this research,a series of Sm3+doped CsLu（WO4）2phosphors was prepared via high temperature solid phase technique to design new red phosphors and optical thermometric *** structures,morphology,band gap and luminescence properties were characterized by X-ray diffraction,scanning electron microscopy,diffuse reflection and luminescence spectra,*** UV excitation,CsLu（WO4）2gives rise to a blue broad emission band between 350 and 700 nm,which stems from the3T1u→1A1gtransition of *** Sm3+is introduced into CsLu（WO4）2,energy transfer between WO66-groups and Sm3+ions takes place in CsLu（WO4）2:Sm3+phosphors,and color-tunable luminescence from blue to red is realized by controlling the Sm3+doping *** energy transfer efficiency between WO66-groups and Sm3+ons was analyzed,and the energy transfer mechanism was determined to be dipole-dipole *** to the temperature-dependent luminescence spectra,WO66-groups and Sm3+ions exhibit large discrepancy in thermal quenching rates,and thus the temperature sensing properties of CsLu（WO4）2:Sm3+in the temperature range of 283-403 K were *** on the framework of fluorescence intensity ratio theory,the basic optical thermometry parameters including absolute and relative sensitivity of CsLu（WO4）2:Sm3+we re calculated and the results show that it has great potential for application in optical thermometry.

关键词： Energy transfer Fluorescence intensity ratio Optical thermometry Phosphors Rare earths

A function-based behavioral modeling method for air combat simulation

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Journal of Systems Engineering and Electronics 2024年第4期35卷 945-954页

作者： wang Tao ZHU zhi ZHOU Xin jing Tian CHEN Wei College of Systems Engineering National University of Defense TechnologyChangsha 410073China Institute of Communication and Navigation Air Force Research AcademyBeijing 100085China

Today’s air combat has reached a high level of uncertainty where continuous or discrete variables with crisp values cannot be properly represented using fuzzy sets. With a set of membership functions, fuzzy logic is well-suited to tackle such complex states and actions. However, it is not necessary to fuzzify the variables that have definite discrete ***, the aim of this study is to improve the level of model abstraction by proposing multiple levels of cascaded hierarchical structures from the perspective of function, namely, the functional decision tree. This method is developed to represent behavioral modeling of air combat systems, and its metamodel,execution mechanism, and code generation can provide a sound basis for function-based behavioral modeling. As a proof of concept, an air combat simulation is developed to validate this method and the results show that the fighter Alpha built using the proposed framework provides better performance than that using default scripts.

关键词： air combat behavioral modeling intelligent agent

Highly Stretchable and Tunable Thermo-fluorochromic Polymer Elastomer through Eu^(3+)Dynamic Coordination Cross-linking

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Chinese Journal of Polymer Science 2024年第10期42卷 1449-1458,I0008页

作者： Qiu-Li Tan Kai Gou jing-zhi Tang Ming-Hui Wei Chong wang Yi-jing Nie Geng-Sheng Weng School of Materials Science and Chemical Engineering State Key Laboratory Base of Novel Functional Materials and Preparation ScienceNingbo UniversityNingbo315211China Institute of Polymer Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang212013China

Thermochromic polymers with tunable thermochromism,high stretchability and mechanical strength are of interests for optical information storage and *** this work,we demonstrate a new design of thermo-fluorochromic carboxylated nitrile butadiene rubber(XNBR)elastomer cross-linked by Eu^(3+)-COOH dynamic coordination with deprotonated imidazole(DPIm)as the ancillary *** presence of DPIm not only improves the mechanical strength and stretchability,but also dramatically intensifies the fluorescence emission and lifetime of the Eu-containing *** elastomer behaves reversible thermo-fluorochromism with easily tunable transition temperature and emission intensity by the simple change of the deprotonation degree of *** facile tunable thermo-fluorochromism,exceptional mechanical strength,and high stretchability(up to about 5000%)enable the Eu-containing XNBR elastomer with potential applications in soft electronics where optical information storage and encryption are required.

关键词： Dynamic coordination Thermochromism Highly stretchable Elastomer Europium

Defect engineering in N-doped OMC for lightweight and high-efficiency electromagnetic wave absorption

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Journal of Materiomics 2024年第1期10卷 190-199页

作者： Panpan Zhou jing Zhang zhi Song Yawei Kuang Yushen Liu Lixi wang Qitu Zhang School of Electronic and Information Engineering Changshu Institute of TechnologyChangshu215500China College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China China Geological Survey Nanjing CenterNanjing210016China Supervision and Testing Center of East China Mineral Resources of the Ministry of Land and ResourcesNanjing210016China

Developing low density and efficient dielectric loss materials has become a research hotspot,which can greatly meet the demands of modern radars and settle the problem of electromagnetic wave ***,a series of N-doped ordered mesoporous carbon(OMC)materials with different nitrogen content were prepared via a modified self-assembly method and defect engineering in subsequent calcination *** was discovered that the content and type of nitrogen doping can be effectively modulated by the amount of precursor dicyandiamide,resulting in the changes in porous structure,carbon defects,electromagnetic properties,microwave absorption(MA)performance and radar cross section(RCS)reduction ***,as-fabricated OMC/N2.5 displays ideal MA performance,whose minimum reflection loss(RL(min))value reaches−35.3 dB at 7.76 GHz(3.0 mm)and its effective absorption bandwidth reaches 3.52 GHz(10.64-14.16 GHz,2.0 mm).Furthermore,the optimal RCS reduction values can be obtained as 12.01 dB·m^(2) when the detection theta is 30°,which validly reduces the chances of being detected by ***,this work opens up a novel way for the development of lightweight and high-efficiency MA materials.

关键词： OMC N-doped Defect engineering RCS simulation Microwave absorption

Room-temperature Self-healing and Recyclable PDMS Elastomers with Superior Mechanical Properties for Triboelectric Nanogenerators

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Chinese Journal of Polymer Science 2024年第10期42卷 1566-1577,I0014页

作者： Shu-Juan wang Lu wang Hong-Zhe Su zhi-Cheng Wu Qiao-Gen Zhang Wei Fan Xin-Li jing School of Chemistry Joint Innovation Center of Thermal Protection MaterialsXi’an Jiaotong UniversityXi’an710049China School of Electrical Engineering Xi’an Jiaotong UniversityXi’an710049China School of Textile Science and Engineering Xi’an Polytechnic UniversityXi’an710048China

Polydimethylsiloxane(PDMS)is an electron-withdrawing material that is widely used in triboelectric nanogenerators(TENGs).However,PDMS has poor mechanical properties after curing and is easily damaged when subjected to long-term ***,the long-term stable operation of TENGs under mechanical deformation cannot be *** this work,multiple hydrogen bonds and aromatic disulfide bonds were introduced into PDMS *** elastomers exhibited high toughness(a tensile strength of 1.91 MPa and an elongation at break of 340%),good recyclability,and room-temperature self-healing properties(healing efficiency of 96.4%in 24 h).Recyclable sandwich-like triboelectric nanogenerators with excellent electrical output performance(13.5 V)and room-temperature self-healing performance(24 h,98%recovery of self-generating performance)were prepared by utilizing the hydrogen bonding between the PDMS elastomer and *** work reported herein offers theoretical guidance and a compelling strategy for developing high-performance TENG negative friction layers.

关键词： Polydimethylsiloxane Aromatic disulfide bonds Hydrogen bonds Room temperature self-healing Triboelectric nanogenerator