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Friction 2020年第5期8卷 893-904页

作者： chunjian DUAN Ren HE Song LI Mingchao shao Rui YANG Liming TAO Chao WANG Ping YUAN Tingmei WANG Qihua WANG State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Institute of System Engineering China Academy of Engineering PhysicsMianyang 621900China

Polyimide composites have been extensively used as motion components under extreme conditions for their thermal stability and special self-lubricating performance. In the present study, Ag–Mo hybrids as lubricant fillers were incorporated into thermosetting polyimide to prepare a new type of tribo-materials (TPI-1) at high temperature. Comprehensive investigations at different temperatures reveal that the newly developed TPI-1 exhibits a better reduction in friction and wear rate below 100 ℃, but all of them increase significantly when the bulk temperature exceeds 250℃. The wear mechanisms demonstrated that sandwich-like tribofilms with different layers were established at different temperatures, which was further verified by characterization of scanning electron microscope (SEM), Raman spectroscopy, and transmission electron microscope (TEM). Considering the high-performance TPI coupled with Ag–Mo hybrids, we anticipate that further exploration would provide guidance for designing TPI tribo-materials that would be used at high temperatures.

关键词： polyimide Ag–Mo hybrids self-lubricating composites high temperature tribology

Molecular Thermal Motion Modulated Room-Temperature Phosphorescence for Multilevel Encryption

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Research 2022年第4期2022卷 597-607页

作者： Jiaqiang Zhao Guojuan Yan Wei Wang Shishi shao Binfang Yuan Yan Jie Li Xuepeng Zhang Cheng Zhi Huang Peng Fei Gao Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China Chongqing Key Laboratory of Inorganic Special Functional Materials Collge of Chemistry and Chemical EngineeringYangtze Normal UniversityFulingChongqing 408100China Hefei National Laboratory for Physical Science at the Microscale University of Science and Technology of China96 Jinzhai RdHefeiAnhui 230026China

The stimulus-responsive room-temperature phosphorescence(RTP)materials have become an increasingly significant topic in the fields of bioimaging,sensing,and ***,this kind of materials is scarce to date,especially for the ones with delicate stimulus-responsive ***,a universal strategy for multilevel thermal erasure of RTP via chromatographic separation of host-guest doping RTP systems is *** tunable host-guest systems,matrix materials,heating temperature,and time are demonstrated to allow precise six-level data encryption,QR code encryption,and thermochromic phosphorescence *** study reveals that the thermal-responsive property might be attributed to molecular thermal motion and the separation effect of the silica gel,which provides expanded applications of host-guest RTP materials such as cold chain break *** work offers a simple yet universal way to construct advanced responsive RTP materials.

关键词： RTP separation precise

Molten Salt-Shielded Synthesis(MS^(3))of MXenes in Air

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Energy & Environmental Materials 2023年第2期6卷 159-164页

作者： Jinjin Chen Qianqian Jin Youbing Li Hui shao Pengcheng Liu ying Liu Pierre-Louis Taberna Qing Huang Zifeng Lin Patrice Simon College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Materials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Qianwan Institute of CNiTECH Zhongchuangyi RoadHangzhou Bay DistrictNingbo 315336China CIRIMAT Universit´e de ToulouseCNRSToulouse 31400France R´eseau sur le Stockage Electrochimique de l’Energie(RS2E)FR CNRS no 3459 Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationChina

MXenes are two-dimensional transition metal carbides and/or nitrides with unique physiochemical properties and have attracted extensive interest in numerous ***,current MXene synthesis methods are limited by hazardous synthesis conditions,high production costs,or difficulty in largescale ***,a general,safe,cost-effective,and scalable synthesis method for MXenes is ***,we report the fast synthesis of MXenes in the open air using a molten salt-shielded synthesis(MS^(3))method,which uses Lewis-acid salts as etchants and a low-melting-point eutectic salt mixture as the reaction medium and shield to prevent MXene oxidation at high *** and nitride MXenes,including Ti_(3)C_(2)T_(x),Ti_(2)CT_(x),Ti_(3)CNT_(x),and Ti_(4)N_(3)T_(x),were successfully synthesized using the MS^(3) *** also present the flexibility of the MS^(3) method by scaling the etching process to large batches of 20 and 60 g of Ti_(3)AlC_(2) MAX precursor in one *** used as negative electrodes,the prepared MS^(3)-MXenes delivered excellent electrochemical properties for high-rate Li-ion storage.

关键词： carbides lithium-ion storage molten salt synthesis MXene nitrides

Whole process prediction model of silicon steel strip on transverse thickness difference based on Takagi-Sugeno fuzzy network

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Journal of Iron and Steel Research International 2023年第12期30卷 2448-2458页

作者： Hai-nan He Zhuo-hao Dai Xiao-chen Wang Quan Yang Jian shao Jing-dong Li Zhi-hong Zhang Liang Zhang National Engineering Technology Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing100083China Handan Iron and Steel Company of Hebei Iron and Steel Group Co. Ltd.Handan056015HebeiChina

The hot rolling and cold rolling control models of silicon steel strip were *** control of silicon steel strip of hot rolling was a theoretical analysis model,and the shape control of cold rolling was a data-based prediction *** mathematical model of the hot-rolled silicon steel section,including the crown genetic model,inter-stand crown recovery model,and hot-rolled strip section prediction model,is used to control the shape of hot-rolled *** cold rolling shape control is mainly based on Takagi-Sugeno fuzzy network,which is used to simulate and predict the transverse thickness difference of cold-rolled silicon steel ***,a predictive model for the transverse thickness difference of silicon steel strips is developed to provide a new quality control method of transverse thickness of combined hot and cold rolling to improve the strip profile quality and increase economic *** qualified rate of the non-oriented silicon steel strip is finally obtained by applying this model,and it has been steadily upgraded to meet the needs of product quality and flexible production.

关键词： Hot rolling-Strip profile Transverse thickness difference Silicon steel.Takagi-Sugeno fuzzy network

Lithium/Silver-Doped Cu_2ZnSnS_4 with Tunable Band Gaps and Phase Structures: a First-Principles Study

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Chinese Physics Letters 2018年第8期35卷 19-23页

作者： Jun Zhang Jun Liao Le-Xi shao Shu-Wen Xue Zhi-Cuo Wang School of Physical Science and Technology Lingnan Normal UniversityZhanjiang 524048 School of Electronics Science and Engineering Center for Public Security TechnologyUniversity of Electronic Science and Technology of ChinaChengdu 610054

Doping is an effective approach for improving the photovoltaic performance of Cu2 ZnSnS4（CZTS）. The doping by substitution of Cu atoms in CZTS with Li and Ag atoms is investigated using density functional theory. The results show that the band gaps of Li（2 x）Cu2（1-x）ZnSnS4 and Ag（2 x）Cu2（1-x）ZnSnS4 can be tuned in the ranges of 1.30-3.43 and 1.30-1.63 eV, respectively. The calculation also reveals a phase transition from kesterite to wurtzite-kesterite for Li（2 x）Cu2（1-x）ZnSnS4 as x is larger than 0.9. The tunable band gaps of Li（2 x）Cu2（1-x）ZnSnS4 and Ag（2 x）Cu2（1-x） ZnSnS4 make them beneficial for achieving band-gap-graded solar cells.

关键词： Cu a First-Principles Study Ag Zn Sn

Cryopreservation of Veliger Larvae of Trumpet Shell, Charonia sauliae: an Essential Preparation to Artificial Propagation

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Journal of Ocean University of China 2009年第3期8卷 265-269页

作者： KANG Kyoung Ho ZHANG Zhifeng BAO Zhenmin shao Mingyu Department of Aquaculture Chonnam National University Yeosu-city 550-749 South Korea Key Laboratory of Marine Genetics and Gene Resource Exploration of Ministry of Education （MaGGR） Ocean University of China Qingdao 266003 P. R. China

Trumpet shell, Charonia sauliae, is an endangered and valuable species, but its artificial propagation protocol has not been successfully established. To estimate the possibility of cryopreservation for larvae of C. sauliae, which is a potential preparation for its artificial reproduction and further research, in this study a protocoi for the cryopreservation of veliger larvae of trumpet shell was optimized. Through a two-step cryopreservation procedure, four kinds of cryoprotectants （ethylene glycol, 1, 2-propanediol, dimethyl sulfoxide and glycerol） were employed at three concentrations （1.0, 1.5 and 2.0molL^-1） respectively and survival rates of larvae were determined after a storage of lh. The larvae frozen with these four cryoprotectants after 1 h storage were cultured, and then survival rates were determined at 24, 72 and 120 h after thawing. Dimethyl sulfoxide at a concentration of 1.5 molL^-1 showed the best protective effect in all experiments （p〈0.05）. And survival rates of larvae frozen with dimethyl sulfoxide were determined after 1, 7 and 15 d of storage. The survival rates of larvae frozen with 1.5 molL^-1 dimethyl sulfoxide after 1 h, 1 d, 7 d and 15 d of storage were 80.77% ±7.51%, 80.34%±11.28%, 83.10%±9.14% and 77.23%±6.22% respectively. No significant differences in survival rates of larvae frozen with dimethyl sulfoxide were observed after various storage periods （p〉0.05）.

关键词： trumpet shell Charonia sauliae veliger larva cryopreservation

Urban flood inundation and damage assessment based on numerical simulations of design rainstorms with different characteristics

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Science China(Technological Sciences) 2020年第11期63卷 2292-2304页

作者： MEI Chao LIU JiaHong WANG Hao LI ZeJin YANG ZhiYong shao WeiWei DING XiangYi WENG BaiSha YU yingDong YAN DianYi State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Engineering and Technology Research Center for Water Resources and Hydroecology of the Ministry of Water Resources Beijing 100044China

In the context of global climate change and urbanization,urban flooding is an important type of natural disaster that affects urban development,especially in China,which is experiencing rapid *** the past 10 years,urban flooding events have caused huge disaster losses in Chinese *** has resulted in significant negative effects on the urban infrastructure,socioeconomic systems,and urban residents,thus causing widespread *** have confirmed the change in extreme rainstorms is due to the changing environments in many cities *** studies on the impact of these rainstorms with different characteristics for urban flooding is valuable for coping with unfavorable *** addition,numerical simulations provide an economical and viable means to perform these *** paper presents a numerical model of Xiamen Island in *** were conducted for 12 design rainstorm events with different return periods,rain patterns,and *** results indicate that,in the case of an equal rainfall amount,the rainfall intensity is the key factor that affects the inundated area,depth,and ***,the rainfall intensity is not the only determining factor;the rainfall pattern also affects the *** regard to the rainfall pattern,a higher rainfall peak coefficient usually leads to severe urban inundation and *** a result,the lag time would be shorter,which may further exacerbate the impact of urban flood *** results of this study provide insights into managing flood risks,developing urban flood prevention strategies,and designing flood prevention measures.

关键词： urban flood flood damage assessment flood disaster management numerical simulations design rainstorms

Optimization of silicon-on-insulator based optical switch using tapered waveguides

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Optoelectronics Letters 2007年第5期3卷 326-328页

作者： LI Zhi-yong CHEN shao-wu YU Jin-zhong State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China

Optimized 2×2 switches based on silicon-on-insulator (SOI) were demonstrated. In the design, single mode rib waveguidesand multimode interferences (MMIs) are connected by tapered waveguides to reduce the mode coupling loss between thetwo types of waveguides. The average insertion loss of the switches is about -16.9 dB and the excess loss of one is measuredof -1.3 dB. The worst crosstalk is larger than 25 dB. Experimental results indicate that some of the main characteristics ofoptical switches are improved in the modified design, which is according with theoretic analysis. The novel design can beused to improve the characteristics of optical switch matrixes based on 2×2 switch units.

关键词：光学开关集成电路波导绝缘体

Annual advances of Chinese minority traditional medicine in 2019

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Traditional Medicine Research 2020年第2期5卷 108-121页

作者： shao-Hui Wang Medical College Qingdao Binhai UniversityQingdao 266555China Affiliated Hospital of Qingdao Binhai University Qingdao 266555China

Traditional medicine systems practiced by various ethnic minorities represent an important part of traditional Chinese *** past 12 months have witnessed extensive research pertaining to different Chinese minority traditional medicine(CMTM).The annual CMTM review evaluates research published during 2019 in different CMTM including Tibetan medicine,Uyghur medicine,Mongolian medicine,Korean medicine and Zhuang *** in the field of Tibetan medicine focused on pharmacology,pharmacy,plant sciences,medicinal chemistry and integrated complementary medicine and the top three countries were China,USA and *** in Uyghur medicine mainly pertained to chemistry,pharmacology,pharmacy,and food science technology and the publications were mainly from *** in Mongolian medicine mainly pertained to pharmacology,pharmacy,analytical chemistry,biochemistry,molecular biology and experimental research;the publications were mainly from China and *** short,research related to traditional medicine of various ethnic minorities was mainly conducted in China and the neighboring *** research focus for each minority medicine is essentially on the effects and mechanisms of action of the active ingredients of the ethnodrugs and the special prescriptions or *** generated evidence will facilitate further developments in this field.

关键词： Chinese minority traditional medicine Tibetan medicine Uyghur medicine Mongolian medicine Korean medicine Zhuang medicine

A Moment Inequality and Its Applications

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Journal of Mathematical Research with Applications 1989年第1期 24-23页

作者： shao Qiman(Dept.Math.,Hanfzhou University)

Marcikeiwicz-Zygmud inequality plays a very important rule in various proofs. However it is well-known that M-Z inequality foous on independent random variables. In this paper we establish a more useful inequality for... 详细信息

关键词： very A Moment Inequality and Its Applications