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Nano-Micro Letters 2023年第4期15卷 277-293页

作者： Chuanwei Zhi Shuo Shi Shuai Zhang Yifan Si Jieqiong Yang Shuo meng Bin Fei Jinlian Hu Department of Biomedical Engineering City University of Hong KongHong Kong S.A.R 999077China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong S.A.R 999077China City University of Hong Kong Shenzhen Research Institute Shenzhen 518057People’s Republic of China

Electronic skins can monitor minute physiological signal variations in the human skins and represent the body’s state,showing an emerging trend for alternative medical diagnostics and human-machine *** this study,we designed a bioinspired directional moisture-wicking electronic skin(DMWES)based on the construction of heterogeneous fibrous membranes and the conductive MXene/CNTs electrospraying *** moisture transfer was successfully realized by surface energy gradient and push-pull effect via the design of distinct hydrophobic-hydrophilic difference,which can spontaneously absorb sweat from the *** DMWES membrane showed excellent comprehensive pressure sensing performance,high sensitivity(maximum sensitivity of 548.09 kPa^(−1)),wide linear range,rapid response and recovery *** addition,the single-electrode triboelectric nanogenerator based on the DMWES can deliver a high areal power density of 21.6μW m^(−2) and good cycling stability in high pressure energy ***,the superior pressure sensing and triboelectric performance enabled the DMWES for all-range healthcare sensing,including accurate pulse monitoring,voice recognition,and gait *** work will help to boost the development of the next-generation breathable electronic skins in the applications of AI,human-machine interaction,and soft robots.

关键词： Bioinspired Electrospinning Electronic skin Directional moisture wicking MXene

COLOR CORRECTION FOR HIGH-DEFINITION ELECTRONIC ENDOSCOPE

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Journal of Innovative Optical Health Sciences 2012年第4期5卷 57-63页

作者： CHEN JING WANG LI-QIANG meng ZI-BO YUAN BO DUAN HUI-LONG State Key Laboratory of Modern Optical Instrumentation Zhejiang University HangzhouZhejiang 310027P.R.China Biomedical Engineering Institute Zhejiang University HangzhouZhejiang 310027P.R.China

The subtle color distinction is the important function of electronic endoscope imaging ***,after image acquisition,transmission and display,color distortions of intracorporeal organs or tissues occur inevitably,which are adverse to analyze image features accurately or to diagnose early pathological changes.A real-time color correction algorithm based on fourneighborhood and polynomial regression in YUV color space is *** on polynomial regression the color correction matrix is calculated in YUV color space according to the dierences between standard values of color checker and measured values of that imaged by the *** the correction is only executed on U and V components in YUV color space,the defect that the color of corrected images in RGB color space will change along with luminance can be avoided,and then the stability of image color is *** to four-neighborhood processing,the signal-to-noise ratio of corrected images is enhanced and the processing speed of correction algorithm is *** average color dierence is reduced from 0.3944 to 0.2850 by application of the proposed algorithm in high-denition electronic endoscope.A total of 17 frames per second can be achieved at the resolution of 1280800,and the color characteristics of the image after processing match that of human visual system.

关键词： High-de¯nition electronic endoscope color correction polynomial regression fourneighborhood

Achieving exceptional activity and durability toward oxygen reduction based on a cobalt-free perovskite for solid oxide fuel cells

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Journal of Energy Chemistry 2021年第11期30卷 653-659,I0016页

作者： Feifei Dong Zhenghui Gao Bingkai Zhang Lu Li Ziqi Kong Zilin Ma meng Ni Zhan Lin Guangzhou Key Laboratory of Clean Transportation Energy Chemistry School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006GuangdongChina Building Energy Research Group Department of Building and Real EstateThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

In response to the shortcomings of cobalt-rich cathodes, iron-based perovskite oxides appear as promising alternatives for solid oxide fuel cells (SOFCs). However, their inferior electrochemical performance at reduced temperatures (<700 ℃) becomes a major bottleneck for future progress. Here, a novel cobalt-free perovskite Ba_(0.75)Sr_(0.25)Fe_(0.875)Ga_(0.125)O_(3−δ) (BSFG) is developed as an efficient oxygen reduction electrode for SOFCs, featuring cubic-symmetry structure, large oxygen vacancy concentration and fast oxygen transport. Benefiting from these merits, cells incorporated with BSFG achieve exceptionally high electrochemical performance, as evidenced by a low polarization area-specific resistance of 0.074 Ω cm^(2) and a high peak power density of 1145 mW cm^(−2) at 600 ℃. Meanwhile, a robust short-term performance stability of BSFG cathode can be ascribed to the stable crystalline structure and favorable thermal expansion behavior. First-principles computations are also conducted to understanding the superior activity and durability toward oxygen reduction reaction. These pave the way for rationally developing highly active and robust cobalt-free perovskite-type cathode materials for reduced-temperature SOFCs.

关键词： Solid oxide fuel cell Cathode Perovskite Oxygen reduction reaction Cobalt-free

Supply-based optimal scheduling of oil product pipelines

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Petroleum Science 2016年第2期13卷 355-367页

作者： Hao-Ran Zhang Yong-Tu Liang Qiao Xiao meng-Yu Wu Qi Shao Beijing Key Laboratory of Urban Oil and Gas Distribution Technology China University of Petroleum Beijing 102249China CNPC Trans-Asia Gas Pipeline Company Ltd. Beijing 100007 China

Oil product pipelines have features such as transporting multiple materials, ever-changing operating conditions, and synchronism between the oil input plan and the oil offloading plan. In this paper, an optimal model was established for a single-source multi-distribution oil pro- duct pipeline, and scheduling plans were made based on supply. In the model, time node constraints, oil offloading plan constraints, and migration of batch constraints were taken into consideration. The minimum deviation between the demanded oil volumes and the actual offloading volumes was chosen as the objective function, and a linear programming model was established on the basis of known time nodes＇ sequence. The ant colony optimization algo- rithm and simplex method were used to solve the model. The model was applied to a real pipeline and it performed well.

关键词： Oil products pipeline Schedulingoptimization Linear programming (LP) modelAnt colony optimization algorithm (ACO) Simplex method (SM)

Step-confined thin film growth via near-surface atom migration

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Nano Research 2020年第6期13卷 1552-1557页

作者： Caixia meng Junfeng Gao Rongtan Li Yanxiao Ning Yuan Chang Rentao Mu Qiang Fu Xinhe Bao State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China University of Chinese Academy of Sciences Beijing100039China Key Laboratory of Materials Modification by Laser Ion and Electron BeamsDalian University of TechnologyMinistry of EducationDalian116024China University of Science and Technology of China Hefei230026China

Understanding of thin film growth mechanism is crucial for tailoring film growth behaviors,which in turn determine physicochemical properties of the resulting ***,vapor-growth of tungsten carbide overlayers on W(110)surface is investigated by real time low energy electron *** surface growth is strongly confined by surface steps,which is in contrast with overlayer growth crossing steps in a so-called carpet-like growth mode for example in graphene growth on metal *** functional theory calculations indicate that the step-confined growth is caused by the strong interaction of the forming carbide overlayer with the substrate blocking cross-step growth of the ***,the tungsten carbide growth within each terrace is facilitated by the supply of carbon atoms from near-surface regions at high *** findings suggest the critical role of near-surface atom diffusion and step confinement effects in the thin film growth,which may be active in many film growth systems.

关键词： thin film growth tungsten carbide near-surface dopant low-energy electron microscopy(LEEM) step confinement

A phosphotungstic acid coupled silica-Nafion composite membrane with significantly enhanced ion selectivity for vanadium redox flow battery

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Journal of Energy Chemistry 2020年第2期29卷 177-184页

作者： Xiao-Bing Yang Lei Zhao Kokswee Goh Xu-Lei Sui Ling-Hui meng Zhen-Bo Wang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

An ultra-high ion-selective Nafion composite membrane modified by phosphotungstic acid(PWA)coupled silica for vanadium redox flow battery(VRB)was constructed and prepared through solution *** composite membrane exhibits excellent proton conductivity and vanadium ions blocking property by incorporating the nanohybrid composed of silica and PWA into the Nafion *** tuning for the filling amount of the nanohybrid endows the obtained membranes preeminent vanadium barrier property including a minimum vanadium permeability of 3.13×10-7cm2min-1and a maximum proton conductivity of 0.081 S cm-1at 25°*** indicate an ion selectivity of 2.59×105S min cm-3,which is 6.8times higher than that of recast Nafion(0.33×105S min cm-3).As a result,the VRB with the composite membrane shows superior battery performance containing a lower self-discharge rate,higher capacity retention and more robust cyclic stability compared with recast Nafion over a range of current densities from 40 to 100 m A cm-2.

关键词： Vanadium redox flow battery Modified silica Phosphotungstic acid Low vanadium permeability

Feedforward compensation of the insertion devices effects in the SSRF storage ring

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Nuclear Science and Techniques 2022年第6期33卷 34-44页

作者： Xin-Zhong Liu Shun-Qiang Tian Xu Wu meng Wang Zhen-Tang Zhao Bo-Yuan Feng University of Chinese Academy of Sciences Shanghai 201800China Shanghai Institute of Applied Physics Chinese Academy of SciencesBeijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Shanghai University Shanghai 200444China Tsinghua University Beijing 100084China

The lattice of the Shanghai Synchrotron Radiation Facility(SSRF) storage ring was upgraded in the Phase-II beamline project, and thus far, 18 insertion devices(IDs) have been installed. The IDs cause closed-orbit distortions, tune drift, and coupling distortions in the SSRF storage ring, all of which are significant issues that require solutions. In this study, an ID orbit feedforward compensation system based on a response matrix using corrector coils was developed, and it was applied to all commissioned IDs in the SSRF storage ring. After correction, the maximum ID-induced horizontal and vertical orbit distortions were less than 5.0 and 3.5 μm, respectively. Some interesting phenomena observed during the measurement process were explained. Additionally, optical and coupling feedforward systems were developed using quadrupole and skew quadrupole magnets installed on the front and back of elliptically polarizing undulators(EPUs). Moreover, over nearly four months of operation, the developed strategy delivered a satisfactory performance in the SSRF storage ring.

关键词： Shanghai Synchrotron Radiation Facility(SSRF) Insertion devices(IDs) Closed-orbit distortion Tune shift Coupling Feedforward

An in situ ATR-FTIR study of mixed collectors BHA/DDA adsorption in ilmenite-titanaugite flotation system

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International Journal of Mining Science and Technology 2021年第4期31卷 689-697页

作者： Liping Luo Houqin Wu Longhua Xu Jinping meng Jiahui Lu Huan Zhou Xiaomei Huo Lingyun Huang Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education Southwest University of Science and TechnologyMianyang 621010China School of Civil Engineering and Architecture Southwest University of Science and TechnologyMianyang 621010China State Key Laboratory for Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China

This paper researched the enhanced flotation separation performance of ilmenite and titanaugite using the mixed collector benzhydroxamic acid/dodecylamine(BHA/DDA).The interface assembly mechanism was mainly investigated through in situ attenuated total reflectance Fourier transform infrared(ATRFTIR)spectroscopy combined with the two-dimensional correlation spectroscopy(2D-COS)and X-ray photoelectron spectroscopy(XPS).It has been found that BHA/DDA mixed collectors successfully separate ilmenite from titanaugite at a molar ratio of 8:*** potential experiments suggested that,in the presence of mixed collector system,the BHA-DDA complex adsorbed on the ilmenite surface via the chemically adsorbed BHA and the electrostatically adsorbed DDA,however,the complex adsorbed on the surface of titanaugite *** to in situ ATR-FTIR combined with 2D-COS and XPS results,the interface assembly mechanism of BHA/DDA is summarized as:the function group of BHA molecules first binds to the metal sites on minerals to form bidentate ligand,then DDA co-adsorbed with BHA on the surface of minerals through hydrogen *** may change the adsorption modes of some BHA on the ilmenite surface from four-membered ring to five-membered ring,while the modes on the titanaugite surface is true ***,recommended adsorption configurations of the BHA/DDA complex on the two mineral surfaces are proposed.

关键词： Ilmenite Titanaugite Mixed collector Flotation Adsorption

Silicification and mineralization in hydrothermal deposits

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Chinese Science Bulletin 1999年第1期44卷 90-94页

作者： meng LiangyiDepartment of Geology, Changchun University of Science and Technology, Changchun 130061, China Department of Geology Changchun University of Science and Technology Changchun China

In hydrothermal deposits there are many types of alteration, including potassic alteration (altered minerals are potassic feldspar and biotite), sericitization, silicification, argillazation,chloritization, carbonification and propylitization, but most of them belong to post-or premineralization alteration except silicification formed during the mineralization period. Silicifation occurred in hydrothermal deposit formation from high, moderate temperature to low temperature and can be divided into early, middle and middle-late stages. The early stage is featured by formation under high temperature and accompanied by mineralization of Sn, W and Mo, while the middle stage was formed under moderate temperature and related to mineralization of *** middle-late stage is characterized by moderate-low ternperature and varied mineralization of Cu,Au,Zn,Ag, Pb and U.

关键词： hydrothermal deposit silicification mineralization.

Synthesis of cis-(±)-2-Hydroxymethyl-5-(Cytosine-1'-yl)-1,3-Oxathiolane (BCH-189)

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Chinese Chemical Letters 2001年第6期12卷 487-488页

作者： Ji Zhen LI Xue Peng QIU Lian Xun GAO meng Xian DING Polymer Chemistry Laboratory Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

The target compound BCH-189 was synthesized with high yield via four steps from benzoyloxy acetylaldehyde and p-dithiane-2,5-diol as starting materials. The synthetic route is preferable to what literature reported.

关键词： Anti-HIV total synthesis BCH-189