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Multi-Body Dynamics Modeling and Simulation Analysis of a Vehicle Suspension Based on Graph Theory

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Journal of Beijing Institute of Technology 2018年第4期27卷 518-526页

作者： Jun Zhang Xin li renjie li School of Mechanical Engineering Beijing Institute of Technology

Multi-body dynamics,relative coordinates and graph theory are combined to analyze the structure of a vehicle *** dynamic equations of the left front suspension system are derived for ***,The pure tire theory model is used as the input criteria of the suspension multibody system dynamic model in order to simulate the suspension K&C characteristics ***,it is important to verify the accuracy of this model by comparing and analyzing the experimental data and simulation *** results show that the model has high precision and can predict the performance of the *** also provides a new solution for the vehicle dynamic modeling.

关键词： multi-body dynamics Matlab suspension graph theory

Numerical and experimental research on annular crossed cable-truss structure under cable rupture

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Earthquake Engineering and Engineering Vibration 2017年第3期16卷 557-569页

作者： liu renjie li Xiongyan Xue Suduo Marijke Mollaert Ye Jihong Key Laboratory of Urban Security and Disaster Engineering of MOE Beijing University of Technology Department of Architectural Engineering Vrije Universiteit Brussel School of Mechanics & Civil Engineering China University of Mining and Technology

The Annular Crossed Cable-Truss Structure（ACCTS） is a new type of Tensile Spatial Structure with a configuration suitable to cover large-span stadiums. Its configuration has potential to perform well in resisting disproportionate collapse. However, its disproportionate collapse resistance hasn＇t yet been analyzed in depth. In this study, numerical and experimental research was carried out to investigate the performance of ACCTS under cable rupture. The numerical analysis was done for ten cable-rupture plans using LS-DYNA（explicit method） and the experimental test on an ACCTS with a diameter of 17.15 m was performed for three cable-rupture plans. It is concluded that, while deflections increase with the number of removed cables, an ACCTS does not undergo a disproportionate collapse and it provides a promising structural concept for tensile spatial structures.

关键词： tensile spatial structure annular tensile cable-truss structure disproportionate collapse

Z-scheme photocatalyst based on porphyrin derivative decorated few-layer BiVO4 nanosheets for efficient visible-light-driven overall water splitting

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Nano Research 2021年第5期14卷 1294-1304页

作者： Jinming Wang Lulu Guo Lei Xu Peng Zeng renjie li Tianyou Peng College of Chemistry and Molecular Sciences Engineering Research Center of Organosilicon Compounds&MaterialsMinistry of EducationWuhan UniversityWuhan430072China School of Food and Pharmaceutical Engineering Zhaoqing UniversityZhaoqing526061China Research Institute of Wuhan University in Shenzhen Wuhan UniversityShenzhen518057China

It is highly desirable to simulate natural photosynthesis by using sunlight to drive the overall water splitting without using external bias and sacrificial ***,few-layer monoclinic BiVO4 nanosheets(BVNS)with a thickness of(∼)4.3 nm,exposed(010)facets and abundant oxygen vacancies are fabricated using graphene oxide dots as templating *** decorating with asymmetric chromium porphyrin derivative bearing one benzoic acid and three phenyls as meso-position substituents(chromium-5-(4-carboxyphenyl)-10,15,20-triphenylporphrin,CrmTPP)and PtOx cocatalyst,the obtained two-dimensional(2D)hybrid nanocomposite(BVNS/CrmTPP/Pt)with an optimal component ratio delivers a robust overall water splitting performance with a relatively high apparent quantum yield(8.67%)at 400 nm monochromatic *** ultrathin structure and widely distributed oxygen vacancies on the exposed(010)facets of BVNS not only endow strong and intimate contact with the decorated CrmTPP molecules to promote a two-step excitation Z-scheme charge transfer mechanism for preserving the high redox ability of the photogenerated charge carriers,but also alleviate their recombination,and thus causing the robust overall water splitting performance of the 2D hybrid *** present results provide a novel strategy to construct highly efficient artificial photosynthetic system for overall water splitting.

关键词： Z-scheme photocatalyst ultrathin BiVO4 nanosheet porphyrin derivative overall water splitting artificial photosynthesis

Smart responsive staple for dynamic promotion of anastomotic stoma healing

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Bioactive Materials 2024年第9期39卷 630-642页

作者： Qi Sun Zifeng Yang Ruijun Xu renjie li Yang li Feng Wang Yong li School of Medicine South China University of TechnologyGuangzhouGuangdong510006China Department of Gastrointestinal Surgery Department of General SurgeryGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou510080China Guangxi Key Laboratory of Green Chemical Materials and Safety Technology Guangxi Engineering Research Center for New Chemical Materials and Safety TechnologyCollege of Petroleum and Chemical EngineeringBeibu Gulf UniversityQinzhou535011China

The precise combination of conflicting biological properties through sophisticated structural and functional design to meet all the requirements of anastomotic healing is of great demand but remains ***,we develop a smart responsive anastomotic staple(Ti–OH-MC)by integrating porous titanium anastomotic staple with multifunctional polytannic acid/tannic acid *** design achieves dynamic sequential regulation of antibacterial,anti-inflammatory,and cell proliferation *** the inflammatory phase of the anastomotic stoma,our Ti–OH-MC can release tannic acid to provide antibacterial and anti-inflammatory properties,together with immune microenvironment regulation *** the same time,as the healing progresses,the multifunctional coating gradually falls off to expose the porous structure of the titanium anastomotic staple,which promotes cell adhesion and proliferation during the later proliferative and remodeling *** a result,our Ti–OH-MC exceeds the properties of clinically used titanium anastomotic staple,and can effectively promote the *** staple’s preparation strategy is simple and biocompatible,promising for industrialisation and clinical *** work provides an effective anastomotic staple for anastomotic stoma healing and serve as a reference for the functional design and preparation of other types of titanium-based tissue repair materials.

关键词： Anastomotic staple Smart responsive Coating Tannic acid Anastomotic stoma healing

Effect of yttrium on catalytic performance of Y-doped TiO_(2) catalysts for propane dehydrogenation

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Journal of Rare Earths 2024年第5期42卷 962-971,I0005页

作者： liyu Hou liming Xia Ruipeng Zhou Jianmei li renjie li Zhen Zhao Guimei Yuan Aijun Duan State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang110034China

Defective bulk catalysts based on TiO_(2) have superior catalytic performance for propane dehydrogenation(PDH).The oxygen vacancy concentration and the number of active sites on the catalyst surface can be effectively tuned by doping metal in TiO_(2).Herein,yttrium(Y)-doped titanium dioxide(nY/TiO_(x))catalysts were in-situ synthesized via the coprecipitation method to study the effect of rare earth metal Y doping on the structure of TiO_(2) and the catalytic performance for *** results demonstrate that Ydoped TiO_(2) exhibits higher catalytic activity,propylene selectivity and stability than bare TiO_(2).Full characterizations with X-ray diffraction(XRD),high-resolution transmission electron microscope(HRTEM),X-ray photoelectron spectroscopy(XPS),infrared spectroscopy of pyridine adsorption(Py-IR),temperature-programmed desorption of ammonia(NH_(3)-TPD),H_(2) temperature-programmed reduction(H_2-TPR),and Raman techniques on these catalysts reveal that Y^(3+)can enter TiO_(2) lattice,and the lattice stability of the catalyst can be enhanced by replacing Ti^(4+)to form Y-O-Ti ***,the introduction of an appropriate amount of Y can obviously promote the PDH reaction by adjusting the acidity of the catalyst,improving the release capacity of TiO_(2) lattice oxygen and increasing the formation of active ***,excessive Y doping will lead to pore clogging,and the exposure of active sites will be reduced,resulting in the degradation of catalytic performance.

关键词： Propane dehydrogenation Anatase Lattice defects Coordinatively unsaturated Ti cations Oxygen vacancy Rare earths

Mo_(3)Nb_(14)O_(44): A New li^(+) Container for High-Performance Electrochemical Energy Storage

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Energy & Environmental Materials 2021年第1期4卷 65-71页

作者： renjie li Guisheng liang Xiangzhen Zhu Qingfeng Fu Yongjun Chen lijie Luo Chunfu lin Institute of Materials for Energy and Environment School of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Materials Science and Engineering Hainan UniversityHaikou 570228China Songshan Lake Materials Laboratory Dongguan 523808China

Intercalating Nb-based oxides are promising anode compounds for lithiumion batteries since they have both good safety and large ***,the research in this field is still ***,Mo_(3)Nb_(14)O_(44)with a large theoretical capacity of 398 mAh g^(–1)(Mo^(64)←→Mo^(4+)and Nb^(5+)←→Nb^(3+))is exploited as a new Nb-based oxide anode compound,and Mo_(3)Nb_(14)O_(44)micron-sized particles(Mo_(3)Nb_(14)O_(44)-M)and Mo3Nb14O44 nanowires(Mo_(3)Nb_(14)O_(44)-N)are ***3Nb14O44 owns a tetragonal shear ReO_(3)crystal structure(high-symmetric 14 space group)constructed by 4×4×∞(Mo,Nb)O_(6)octahedron blocks linked by Mo O4 tetrahedra,forming an A–B–A layered structure with a large interlayer *** interesting structure allows fast li+storage within the interlayers and significant intercalation-pseudocapacitive behavior,leading to the high rate performance of Mo_(3)Nb_(14)O_(44)-M/Mo_(3)Nb_(14)O_(44)-N with a large 10 C versus 0.1 C capacity retention percentage of 38.1/54.2%.Mo_(3)Nb_(14)O_(44)-M/Mo_(3)Nb_(14)O_(44)-N further exhibits a safe operating potential of 1.72/1.68 V,large reversible capacity of 323/321 m Ah g^(–1)at 0.1 C,high initial coulombic efficiency of 92.2/90.0%,and good cycling stability with 71.8/75.8%capacity retention after 1000 cycles at10 ***,a li Mn_(2)O_(4)/Mo_(3)Nb_(14)O_(44)-N full cell also performs ***,Mo_(3)Nb_(14)O_(44)holds great promise as a fast-charging,safe,largecapacity,high-efficient,and long-life li^(+)anode container.

关键词： anode in situ XRD li^(+)storage Mo3Nb14O44 shear ReO3 crystal structure

Tumor-targeting intravenous lipid emulsion of paclitaxel:Characteristics,stability,toxicity,and toxicokinetics

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Journal of Pharmaceutical Analysis 2022年第6期12卷 901-912页

作者： Jun Ye lin li Jiye Yin Hongliang Wang renjie li Yanfang Yang Yongbiao Guan Xuejun Xia Yuling liu State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing100050China Beijing Key Laboratory of Drug Delivery Technology and Novel Formulation Institute of Materia MedicaChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing100050China National Beijing Center for Drug Safety Evaluation and Research Beijing Institute of Pharmacology and ToxicologyAcademy of Military Medical SciencesBeijing100850China

lipid nanoemulsions are promising nanodrug delivery carriers that can improve the efficacy and safety of paclitaxel(PTX).However,no intravenous lipid emulsion of PTX has been approved for clinical treatment,and systemic safety profiles have not yet been *** we outline the development of a PTXloaded tumor-targeting intravenous lipid emulsion(PTX Emul)and describe its characteristics,colloidal stability,and systemic safety profiles in terms of acute toxicity,long-term toxicity,and *** also compare PTX Emul with conventional PTX *** showed that PTX Emul exhibited an ideal average particle size(approximately 160 nm)with narrow size distribution and robust colloidal stability under different *** reaction and hemolysis tests revealed that PTX Emul did not induce hypersensitivity reactions and had no hemolytic *** addition,where the alleviated systemic toxicity of PTX Emul may be attributed to the altered toxicokinetic characteristics in beagle dogs,including the decreased AUC and increased plasma clearance and volume of distribution,PTX Emul alleviated acute and long-term toxicity as evidenced by the enhanced the median lethal dose and approximate lethal dose,moderate body weight change,decreased bone marrow suppression and organ toxicity compared with those under PTX injection at the same dose.A fundamental understanding of the systemic safety profiles,high tumor-targeting efficiency,and superior antitumor activity in vivo of PTX Emul can provide powerful evidence of its therapeutic potential as a future treatment for breast cancer.

关键词： Nanodrug delivery systems lipid emulsion Paclitaxel Colloidal Stability Toxicokinetics

Extending the solid solution range of sodium ferric pyrophosphate:Off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)as a novel cathode for sodium‐ion batteries

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Carbon Energy 2024年第4期6卷 128-139页

作者： Xiang jun Pu Kunran Yang Zibing Pan Chunhua Song Yangyang Lai renjie li Zheng‐Long Xu Zhongxue Chen Yuliang Cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhanChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhouJiangsuChina Zonergy Corporation ZigongSichuanChina Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina

Iron‐based pyrophosphates are attractive cathodes for sodium‐ion batteries due to their large framework,cost‐effectiveness,and high energy ***,the understanding of the crystal structure is scarce and only a limited candidates have been reported so *** this work,we found for the first time that a continuous solid solution,Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2)(0≤α≤1,could be obtained by mutual substitution of cations at center‐symmetric Na3 and Na4 sites while keeping the crystal building blocks of anionic P_(2)O_(7) *** particular,a novel off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)is thus proposed,and its structure,energy storage mechanism,and electrochemical performance are extensively investigated to unveil the structure–function *** as‐prepared off‐stoichiometric electrode delivers appealing performance with a reversible discharge capacity of 83 mAh g^(−1),a working voltage of 2.9 V(***^(+)/Na),the retention of 89.2%of the initial capacity after 500 cycles,and enhanced rate capability of 51 mAh g^(−1)at a current density of 1600 mA g^(−1).This research shows that sodium ferric pyrophosphate could form extended solid solution composition and promising phase is concealed in the range of Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2),offering more chances for exploration of new cathode materials for the construction of high‐performance SIBs.

关键词： extending solid‐solution range off‐stoichiometric Na_(3)Fe_(2.5)(P_(2)O_(7))_(2) sodium‐ion batteries structure-function relationship

Composite electron transport layer for efficient N-I-P type monolithic perovskite/silicon tandem solar cells with high open-circuit voltage

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Journal of Energy Chemistry 2021年第12期30卷 461-467,I0011页

作者： Bingbing Chen Pengyang Wang renjie li Ningyu Ren Yongliang Chen Wei Han lingling Yan Qian Huang Dekun Zhang Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterSolar Energy Conversion CenterNankai UniversityTianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Nankai UniversityTianjin 300350China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai UniversityTianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Nankai UniversityTianjin 300072China Key Laboratory of Semiconductor School of Physical Science and TechnologyInner Mongolia UniversityHohhot 010021Inner Mongolia Autonomous RegionChina Photovoltaic Technology at Universities of Inner Mongolia Autonomous Region Inner Mongolia UniversityHohhot 010021Inner Mongolia Autonomous RegionChina

Perovskite/silicon tandem solar cells(PSTSCs) have exhibited huge technological potential for breaking the Shockley-Queisser limit of single-junction solar cells. The efficiency of P-I-N type PSTSCs has surpassed the single-junction limit, while the performance of N-I-P type PSTSCs is far below the theoretical value. Here, we developed a composite electron transport layer for N-I-P type monolithic PSTSCs with enhanced open-circuit voltage(VOC) and power conversion efficiency(PCE). lithium chloride(li Cl) was added into the tin oxide(SnO_(2)) precursor solution, which simultaneously passivated the defects and increased the electron injection driving force at the electron transfer layer(ETL)/perovskite ***, we achieved monolithic PSTSCs with an efficiency of 25.42% and V_(OC) of 1.92 V, which is the highest PCE and VOCin N-I-P type perovskite/Si tandem devices. This work on interface engineering for improving the PCE of monolithic PSTSCs may bring a new hot point about perovskite-based tandem devices.

关键词： lithium chloride additive Electron transport layer High efficiency Perovskite/Si tandem solar cells