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On the development of ice-water-structure interaction

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Journal of Hydrodynamics 2020年第4期32卷 629-652页

作者： bao-yu ni Duan-feng Han Shao-cheng Di Yan-zhuo Xue College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

Ice-water-structure interaction (IWSI) is a novel extension of the fluid-structure interaction (FSI), which is significant fordesign and operating of polar ship and offshore structures. It involves multi-media and multi-interfaces and thus is quite complicated tosolve, no matter from mathematical or mechanical perspectives. Although IWSI is complex and still very new, researchers try todevelop various methods to deal with it and relevant literature starts to bloom. This paper aims to provide concise descriptions oftypical analytical numerical and experimental methods to solve IWSI, together with a review of their major applications to date. Lastly,we succinctly highlight some development tendencies and some pieces of work to be investigated for each method.

关键词： Ice-water-structure interaction(IWSI) ice polar ships ocean engineering fluid-structure interaction(FSI)

Numerical simulation of motion and deformation of ring bubble along body surface

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Applied Mathematics and Mechanics(English Edition) 2013年第12期34卷 1495-1512页

作者：倪宝玉张阿漫 G.X.WU College of Shipbuilding Engineering Harbin Engineering University Department of Mechanical Engineering University College London

Numerical simulation for fluid flow over an attached rigid body with a deformable ring bubble is analyzed based on the velocity potential theory together with the boundary element method （BEM）. The analysis is focused on the axisymmetric case. The bubble surface is treated as a well defined air-liquid interface and is tracked by a mixed Eulerian-Lagrangian method. The points of intersection between the bubble and body are treated, specially in the numerical procedure. The auxiliary function method is adopted to calculate the pressure on the body surface and in the flow field. The convergence study is undertaken to assess the developed numerical method and the computation code. Some case studies are undertaken in which the interactions between the bubble/body and the incoming flow field are simulated. The effects of various physical parameters on the interactions are investigated.

关键词： bubble dynamics moving boundary axisymmetric flow boundary elementmethod

CaH2-promoted activity of ni-carbonate interface for CO2 methanation

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Journal of Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin Jiang bao-Xia Dong yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the ni/CaCO3（31.6%） and ni/CaH2-CaO （42.4%） ***,the ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the ni-carbonate interface for ***2could modify the electronic structure of ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： Metal hydride ni catalysts Carbonate Metal-carbonate interface

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

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Science China Chemistry 2025年第01期 201-208页

作者： Hui-Feng Wang Wen-Jie Shi yu-Xin Yang bao-Xia Dong Tong-Bu Lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co ni-In and ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

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Boosting bidirectional sulfur conversion enabled by introducing boron-doped atoms and phosphorus vacancies in ni2P for lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： Lin Peng yu Bai Hang Li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing Key Laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lithium-sulfur （Li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of ni2P by concurrently introducing B-doped atoms and P vacancies in ni2P （Vp-B-ni2P）,thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in ni2P causes the redistribution of electron around ni atoms,bringing about the upward shift of d-band center of ni atoms and effective d-p orbital hybridization between ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysulfides （LiPSs） as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in ni2P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-ni2P-separators present outstanding rate ability of 777 m A h g-1at 5 C and high areal capacity of 8.03 mA h cm-2under E/S of 5μL mg-1and sulfur loading of 7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： Lithium sulfur batteries

Exosomes:the next-generation therapeutic platform for ischemic stroke

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Neural Regeneration Research 2025年第5期20卷 1221-1235页

作者： Wenjing Yin Hongyin Ma Yang Qu Jiaxin Ren Yingying Sun Zhen-ni Guo Yi Yang Stroke Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina Neuroscience Research Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina

Current therapeutic strategies for ischemic stroke fall short of the desired objective of neurological functional ***,there is an urgent need to develop new methods for the treatment of this *** are natural cell-derived vesicles that mediate signal transduction between cells under physiological and pathological *** have low immunogenicity,good stability,high delivery efficiency,and the ability to cross the blood–brain *** physiological properties of exosomes have the potential to lead to new breakthroughs in the treatment of ischemic *** rapid development of nanotechnology has advanced the application of engineered exosomes,which can effectively improve targeting ability,enhance therapeutic efficacy,and minimize the dosages *** in technology have also driven clinical translational research on *** this review,we describe the therapeutic effects of exosomes and their positive roles in current treatment strategies for ischemic stroke,including their antiinflammation,anti-apoptosis,autophagy-regulation,angiogenesis,neurogenesis,and glial scar formation reduction ***,it is worth noting that,despite their significant therapeutic potential,there remains a dearth of standardized characterization methods and efficient isolation techniques capable of producing highly purified *** optimization strategies should prioritize the exploration of suitable isolation techniques and the establishment of unified workflows to effectively harness exosomes for diagnostic or therapeutic applications in ischemic ***,our review aims to summarize our understanding of exosome-based treatment prospects in ischemic stroke and foster innovative ideas for the development of exosome-based therapies.

关键词： blood–brain barrier electroacupuncture engineering exercise exosomes ischemic stroke mesenchymal stem cells microglia neuroprotection stents

Dynamic Test of Hydro Mechanical Composite Transmission for Cotton Picker

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Journal of Beijing Institute of Technology 2020年第3期29卷 366-378页

作者： Xiangdong ni Mingxi bao College of Mechanical and Electrical Engineering Shihezi UniversityShihezi 832003XinjiangChina Key Laboratory of Northwest Agricultural Equipment Ministry of AgricultureShihezi UniversityShihezi 832003XinjiangChina

With a transmission system suitable for a medium or large self-propelled cotton picker as the object of the study,the following work focuses on the influence law of an independently designed hydro-mechanical continuously variable transmission(HMCVT)in the process of changing *** HMCVT simulation model was established using the multibody dynamics Simulation X *** accuracy of the simulation model was verified by comparing the numerical values of the output speed of the HMCVT with model *** HMCVT test bench was built independently using a John Deere 4045HYC11 diesel engine as power *** engine speed,load torque,oil pressure,and flow of speed regulating valve were considered the influencing *** sliding friction power was the response index for the segment change process *** analysed the reasons for the decrease in output speed during the shifting process,and proposed to effectively reduce the stable speed difference before and after the output shaft shifting by shifting the stage ahead(with displacement ratio of-0.96).This study provides a reference value for the smoothness of the HMCVT of the self-propelled cotton picker,and is relevant in promoting the use of the cotton picker.

关键词： transmission scheme shifting process test analysis dynamic characteristics

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Improved Cd determination in glasses by laser ablation inductively coupled plasma mass spectrometry using nitrogen as a matrix modifier

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Chinese Chemical Letters 2009年第1期20卷 92-95页

作者： Qian ni Zhao Chu Hu Zheng yu bao Ya Feng Zhang State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan 430074 China Laboratory of No. 9 Gold Detachment Chinese People's Arming Police Unit Hainan 570216 China

The addition of 5-10 mL min^-1 nitrogen to the central channel of plasma in Laser ablation Inductively Coupled Plasma Mass Spectrometry （LA-ICP-MS） increases the sensitivities of Cd by a factor of 3 and decreases oxide interferences by one order of magnitude, which allows the direct analysis of trace levels of Cd in glass samples. This simple method shows a great potential for the direct determination of Cd in various kinds of samples.

关键词： LA-ICP-MS Cd MPI-DING glass

Influence of cooling rate on magneto-structural transition and magnetocaloric effect of ni_(30)Cu)8Co_(12)Mn_(37)Ga_(13) alloy

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Journal of Iron and Steel Research International 2017年第7期24卷 711-717页

作者： Zhu-jun Jiang yu-ye Wu Jing-min Wang Cheng-bao Jiang School of Materials Science and Engineering Beihang University School of Physics and Nuclear Energy Engineering Beihang University

The influence of heat treatment with different cooling rates on phase transition behaviors and magnetocaloric effect is systematically *** in atomic order is induced by changing cooling rates,where ordered phase is obtained in the furnace cooled（FC）sample while disordered phase is reserved in the water quenched（WQ）*** coupled magneto-structural transition is detected in both samples but the characteristic temperature significantly shifts to lower temperatures with increasing atomic *** magnetic entropy change（ΔS_（mag））derived from magnetic field induced martensitic transformation is confirmed for both samples,and can be remarkably enhanced by the atomic *** largestΔS_（mag） of 20.9J/（kg·K）is obtained at 307.5Kunder 5Tin the FC sample.

关键词： Ferromagnetic shape memory alloy Heat treatment Martensitic transformation Magnetocaloric effect Cooling rate Magneto-structural transition