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International Journal of Mining Science and Technology 2021年第6期31卷 1033-1042页

作者： Zhouyueyang Cheng yimin zhu Yanjun Li Stephen Butt a College of Resource and Civil Engineering Northeastern UniversityShenyang 110819China b National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology Shenyang 110819China c Faculty of Engineering and Applied Science Memorial University of NewfoundlandSt.John’s A1C 5S7Canada

In this paper,two surfactants,3-dodecyloxypropanamine(DOPA) and 3-tetradecyloxypropylamine(TOPA),were synthesized and used as collectors in the quartz micro-flotation in the *** tests,FT-IR,XPS measurements,and ab initio Molecular Dynamics(MD) simulations were conducted to research DOPA,TOPA,and dodecylamine(DDA)'s adsorption mechanisms onto quartz(101)*** results of micro-flotation show that the adsorption of DOPA and TOPA onto quartz surface is more robust than that of *** zeta-potential result shows that the DOPA/TOPA was adsorbed on quartz through electrostatic ***,MD simulation adsorption models were built to compare the computational properties of the three surfactants,such as the radial distribution function,and the interaction energies between the collectors and the quartz cleavage *** interaction energies of surfactants(RNH_(3)^(+) or RNH_(2)) on the quartz surface explained why the pH range of DOPA/TOPA is wider than that of *** analyses and MD simulations confirmed that DOPA bonded with the(101) surface of quartz through three types of hydrogen bonds between the-NH_(2) of DOPA and the O atom of *** hydrogen bonds of type A and type C were the most likely type and more potent than those of type B.

关键词： Quartz(101)surface Flotation Molecular dynamics 3-Dodecyloxypropanamine Adsorption

The Effect of Moisture in Different Altitude Layers on the Eastward Propagation of MJO

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Journal of Meteorological Research 2024年第3期38卷 437-452页

作者： Xiaoyu zhu Zhong ZHONG yimin zhu Yunying LI Yijia HU Yao HA College of Meteorology and Oceanography National University of Defense TechnologyChangsha410000China Key Laboratory for Virtual Geographic Environment School of Geography ScienceNanjing Normal UniversityNanjing210023China Jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric SciencesNanjing UniversityNanjing210000China

In this study,driven by ERA5 reanalysis data,the Weather Research and Forecasting(WRF)version 4.0 was used to investigate the eastward propagation of the Madden-Julian oscillation(MJO)in the tropical atmosphere during December-February(DJF)of 2007/*** experiment with 11 cumulus parameterization schemes respectively shows that the Grell 3D scheme is one of several worse ones in describing MJO *** addition,still by use of the Grell 3D scheme,four nudging assimilation experiments for water vapor in all model vertical layers(Ndg_all),lower layers(Ndg_low),middle layers(Ndg_mid),and upper layers(Ndg_upp)were *** is found that when the water vapor in the model approaches to the observed value,the model performance for MJO activities is improved *** the four nudging simulations,Ndg_all certainly performs *** Ndg_mid is important for the MJO-filtered profiles related to moisture,Ndg_low and Ndg_upp exhibit superiority to Ndg_mid in simulating MJO eastward ***_low has advantages when MJO features are represented by zonal wind at 850 hPa and precipitation because the lower-level MJO-filtered moisture is conducive to the existence of lower-level condensational heating to the east of the MJO convective ***_upp performs better when describing the MJO eastward propagation features by outgoing longwave radiation(OLR)since it can capture the moisture and cloud top temperature of deep convection associated with MJO,as well as front Walker *** results suggest that the lower-level moisture is more important in regulating the MJO eastward propagation,and the observed maximum MJO-filtered moisture in the middle troposphere might be a phenomenon accompanying the MJO deep convection,but not a factor controlling its eastward propagation.

关键词： Madden-Julian oscillation(MJO) nudging technique Weather Research and Forecasting(WRF)model vertical moisture structure

Up-regulation of Let-7a Expression Induces Gastric Carcinoma Cell Apoptosis In Vitro

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Chinese Medical Sciences Journal 2017年第1期32卷 44-47页

作者： yimin zhu Fuying Xu Department of Surgery College of Medicine and Health Lishui University/Lishui People’s Hospital Lishui Zhejiang 323000 China

Objective To investigate effect of let-7a gene over-expression on apoptosis of gastric cancer cell lines SGC-7901. Methods The stable let-7a gene over-expressing SGC-7901 cells,SGC-7901/let-7a cells,were established using shRNA lentiviral vector methods. Real-time RT-PCR analysis was used to evaluate the expression level of let-7a mRNA. Cells apoptosis was assessed by flow cytometry. Results RT-PCR analysis revealed let-7a expression in SGC-7901/let-7a cells was significantly increased. Cellular apoptosis assay showed that over-expression of let-7a could increase apoptosis of SGC-7901 cells(P=0.002). Conclusion Up-regulating let-7a expression promoted apoptosis in SGC-7901 cells.

关键词： gastric carcinoma microRNA apoptosis

Enhancing toluene removal in a plasma photocatalytic system through a black TiO2 photocatalyst

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Plasma Science and Technology 2019年第11期21卷 77-85页

作者： Bin zhu Luyao ZHANG Yan YAN Meng LI yimin zhu Collaborative Irmovation Center for Vessel Pollution Monitoring and Control Dalian Maritime UniversityDalian 116026People's Republic of China

An efficient toluene removal in air using a plasma photocatalytic system（PPS） not only needs favorable surface reactions over photocatalysts under the action of plasma,but also requires the photocatalysts to efficiently absorb light emitted from the discharge for driving the photocatalytic reactions. We report here that the PPS constructed by integrating a black titania（B-TiO2）photocatalyst with a dielectric barrier discharge（DBD） can effectively remove toluene with above 70% CO2 selectivity and remarkably reduced the concentration of secondary pollutants of ozone and nitrogen oxides at a specific energy input of 1500 J·l-1,while exhibiting good stability. Photocatalyst characterizations suggest that the B-TiO2 provides a high concentration of oxygen vacancies for the surface oxidation of toluene in DBD,and efficiently absorbs ultraviolet–visible light emitted from the discharge to induce plasma photocatalytic oxidation of toluene. The presence of B-TiO2 in the plasma region also results in a high discharge efficiency,facilitating the generation of large numbers of reactive species and thus the oxidation of toluene towards CO2. The greatly enhanced performance of the PPS integrated with B-TiO2 in toluene removal offers a promising approach to efficiently remove refractory volatile organic compounds from air at low temperatures.

关键词： plasma photocatalysis black TiO2 synergetic effect dielectric barrier discharge toluene removal

Real-Time Avatar Pose Transfer and Motion Generation Using Locally Encoded Laplacian Offsets

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Journal of Computer Science & Technology 2019年第2期34卷 256-271页

作者： Masoud Zadghorban Lifkooee Celong Liu Yongqing Liang yimin zhu Xin Li Department of Electrical and Computer Engineering Louisiana State University Baton Rouge 70803 U.S.A. Department of Construction Management Louisiana State University Baton Rouge 70803 U.S.A.

We propose a human avatar representation scheme based on intrinsic coordinates,which are invariant to isometry and insensitive to human pose changes,and an efficient pose transfer algorithm that can utilize this representation to reconstruct a human body geometry following a given *** a pose transfer algorithm can be used to control the movement of an avatar model in virtual reality environments following a user's motion in real *** proposed algorithm consists of three main ***,we recognize the user's pose and select a template model from the database who has a similar pose;then,the intrinsic Laplacian offsets encoded in local coordinates are used to reconstruct the human body geometry following the template pose;finally,the morphing between the two poses is generated using a linear *** perform experiments to evaluate the accuracy and efficiency of our *** believe our proposed system is a promising human modeling tool that can be used in general virtual reality applications.

关键词： human body pose transfer local intrinsic coordinates avatar control in virtual reality

A Climatological Perspective on Extratropical Synoptic-Scale Transient Eddy Activity Response to Western Pacific Tropical Cyclones

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Advances in Atmospheric Sciences 2022年第2期39卷 333-343页

作者： Yao HA Zhong ZHONG Haikun ZHAO yimin zhu Yao YAO Yijia HU College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Jiangsu Collaborative Innovation Center for Climate Change and School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Key Laboratory of Meteorological Disaster of Ministry of Education and Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Sciences and TechnologyNanjing 210044China

An observational study focusing on the contribution of tropical cyclones(TCs)that form over the western North Pacific(WNP)to the synoptic-scale transient eddy activity(STEA)over the North Pacific during the boreal autumn and early winter in the period 1979–2019 is presented in this *** results show that WNP TCs entering the midlatitudinal North Pacific provide significant positive effects on the pentad mean strength of STEA,which is primarily concentrated over the Kuroshio/Oyashio Extensions(KOE)and regions from east of Japan to 160°W in the lower and midto-upper troposphere,*** intensity is highly indicative of the subsequent STEA with a correlation coefficient of 0.37/0.33/0.45 at 300 hPa/500 hPa/850 hPa exceeding the 99%confidence level for the period 1979–*** strength of STEA in the upper troposphere associated with TCs presents a more significant linear growth with TC intensity than that at the mid-to-lower levels after the cyclones enter the KOE region,suggesting that the impact of TCs on STEA gradually increases with *** analyses reveal that the contribution of TCs accounts for 4%–6%of the total STEA change over the KOE region during the late autumn and early *** addition,the influence of TCs on STEA experienced an interdecadal decrease from the early 2000 s through the early 2010 s.

关键词： Synoptic-scale transient eddy activity tropical cyclone North Pacific Kuroshio/Oyashio Extensions mid-latitudinal atmospheric motion

3D MoS_(2) foam integrated with carbon paper as binder-free anode for high performance sodium-ion batteries

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Journal of Energy Chemistry 2022年第2期31卷 26-33页

作者： Fangying Zheng Zeyu Wei Huicong Xia Yunchuan Tu Xiangyu Meng Kaixin zhu Jiao Zhao yimin zhu Jianan Zhang Yan Yang Dehui Deng Institute of Environmental Remediation Dalian Maritime UniversityDalian 116026LiaoningChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Zhang Dayu School of Chemistry Dalian University of TechnologyDalian 116024LiaoningChina

Molybdenum sulfide(MoS_(2))with well-designed porous structure has the potential to be great electrode materials in sodium-ion batteries due to its high theoretical capacity and abundant resource,however,hindered by its intrinsic low conductivity and ***,MoS_(2) with 3 D macroporous foam structure and high conductivity was obtained through SiO_(2) templates and integrated with carbon paper(3 D FMoS_(2)/CP).It has showed superior specific capacity(225 m A h g^(-1),0.4–3 V)and cycling stability(1000 cycles)at high rate(2000 m A g^(-1)),with a low decay rate(0.033%per cycle)in sodium-ion *** excellent electrochemical performance may originate from its unique integrated structure:3 D MoS_(2) macropores providing high surface area and abundant transfer channels while carbon paper enhancing the conductivity of MoS_(2) and avoiding unnecessary side reactions brought by binder addition.

关键词： 3D MoS_(2)foam Carbon paper Binder-free electrode High performance Sodium-ion batteries

Technical feasibility study of an onshore ballast water treatment system

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Frontiers of Environmental Science & Engineering 2011年第4期5卷 610-614页

作者： Shengjie LIU Manxia ZHANG Xiang LI Xiaojia TANG Lingling ZHANG yimin zhu Chengyu YUAN Institute of Environmental Remediation Dalian Maritime UniversityDalian 116026China Liaoning Ocean and Fisheries Science Research Institution Dalian 116026China

To fulfill the requirements of Guidelines forapproval of ballast water management system(G8),a setof onshore ballast water treatment equipment utilizingmicro-pore ceramic filtration(MPCF)and UV radiation(MPCF&UV)system was designed and set up with amaximum flow rate of 80 m^(3)·h^(-1).Technical feasibilities ofMPCF&UV system were evaluated in three areas:removalefficiencies of indicator organism and oceanic bacteria,perdurability of a ceramic filter,and application on *** results showed that no indicator organism(Dunaliella)or oceanic bacteria was detected aftertreatment of 20 L MPCF and UV radiation at 1.3×10^(4)μW·s·cm^(-2).A 20 L ceramic filter can run continuouslyfor 5.3 h at the flow rate of 15 m3·h-1 before itspressure drop up to 0.195 *** removal percentage oftotal plankton amounts were 91.9%at a flow rate of70 m^(3)·h^(-1)by 80 L MPCF and UV radiation at 1.3×10^(4)μW·s·cm^(-2).

关键词： ballast water ceramic filter UV plankton oceanic bacteria

Online Latent Dirichlet Allocation Model Based on Sentiment Polarity Time Series

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Wuhan University Journal of Natural Sciences 2021年第6期26卷 464-472页

作者： HUANG Bo JU Jiaji CHEN Huan zhu yimin LIU Jin SHI Zhicai School of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China Henan Costar Group Ltd Nanyang 450061HenanChina School of Computer Engineering and Science Shanghai UniversityShanghai 200244China Shanghai Key Laboratory of Integrated Administration Technologies for Information Security Shanghai 200240China

The Product Sensitive Online Dirichlet Allocation model(PSOLDA)proposed in this paper mainly uses the sentiment polarity of topic words in the review text to improve the accuracy of topic ***,we use Latent Dirichlet Allocation(LDA)to obtain the distribution of topic words in the current time ***,the word2 vec word vector is used as auxiliary information to determine the sentiment polarity and obtain the sentiment polarity distribution of the current ***,the sentiment polarity changes of the topics in the previous and next time window are mapped to the sentiment factors,and the distribution of topic words in the next time window is controlled through *** experimental results show that the PSOLDA model decreases the probability distribution by 0.1601,while Online Twitter LDA only increases by *** topic evolution method that integrates the sentimental information of topic words proposed in this paper is better than the traditional model.

关键词： topic evolution sentiment factors word vector Latent Dirichlet Allocation(LDA)

Structure and photochromic properties of molybdenumphosphoric acid/TiO_2 composite films

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Science China Chemistry 2009年第2期52卷 169-173页

作者： QI He,LIU Yan,FENG Wei & zhu yimin College of Environmental Science and Engineering,Dalian Maritime University,Dalian 116026,China 1. College of Environmental Science and Engineering Dalian Maritime University Dalian 116026 China

TiO_2 sol-gel composite films with dropping molybdenumphosphoric acid(PMoA) have been prepared by sol-gel *** structure and constitute of composite thin films were studied with Fourier transforms infrared spectroscopy(FT-IR),atomic force microscopy(AFM),and X-ray diffraction(XRD) patterns,*** photochromic behavior and mechanism of composite thin films were inves-tigated with ultraviolet-visible spectra(UV-vis) and electron spin resonance(ESR).FT-IR results showed that the Keggin geometry of PMoA was still preserved inside PMoA/TiO2 composite thin films,and a charge transfer bridge was built at the interface of PMoA and TiO2 through the Mo-O-Ti *** topography of the composite film showed obvious changes before/after adding PMoA,and the surface topography of composite films showed obvious changes before/after irradiating as *** thin film had reversible photochromic *** with UV light,transparent films changed from colorless to blue and they can bleach completely with ambient air in the *** re-sults showed that TiO_2 were excitated by UV light to produce electrons,which deoxidized PMoA to produce *** photochromic process of PMoA/TiO_2 system was carried through elec-tron transfer mechanism.

关键词： molybdenumphosphoric acid TiO_2 composite film photochromism