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Defence Technology（防务技术） 2024年第10期40卷 199-209页

作者： Deqian Meng lipeng sang Pingan Zhang Jianru Deng Xiang Guo College of Chemistry and Chemical Engineering Hunan UniversityChangsha410082China Science and Technology on Aerospace Chemical Power Laboratory Xiangyang441003China

In this paper,high cis-1,4 content hydroxyl-terminated polybutadiene(cis-HTPB)with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw ***,this article comprehensively compared the differences between cis-HTPB and conventional I-HTPB in terms of molecular weight distribution,functionality,viscosity,molecular polarity,and other physicochemical properties,which provided effective data support for its subsequent *** addition,the reaction kinetics study showed that cis-HTPB with isocyanate curing agent has high reactivity,allowing it to be rapidly cured at low temperatures,and the cured elastomers had excellent mechanical properties,with tensile strength and elongation up to 1.89 MPa and 1100%,*** was also found that cis-HTPB has extremely excellent low-temperature resistance,and the glass transition temperature(T_(g))of its cured elastomer is as low as-101℃.Based on the above studies,cis-HTPB is applied as a binder in composite solid propellants for the first time to investigate its practical performance,and the results indicated that cis-HTPB-based propellants have excellent process and mechanical properties.

关键词： High cis-1,4 content-HTPB(cis-HTPB) Low-temperature resistance Comparison of physicochemical properties cis-HTPB curing process cis-HTPB based propellant

NEPE推进剂/衬层界面固化反应机理的理论研究

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固体火箭技术 2024年第4期47卷 493-500页

作者：桑丽鹏李慧闵辉海刘晨朱卫华航天化学能源全国重点实验室襄阳441003 湖北航天化学技术研究所襄阳441003 南京理工大学化学与化工学院南京210094

推进剂/衬层界面是固体火箭发动机燃烧室中的关键结构。采用密度泛函理论(DFT)研究了硝酸酯增塑聚醚(NEPE)推进剂/衬层粘合界面的反应机理,评估了界面结构中不同组分之间的反应途径和过渡态结构,包括聚乙二醇(PEG)、甘油(GO)、三乙醇胺(... 详细信息

推进剂/衬层界面是固体火箭发动机燃烧室中的关键结构。采用密度泛函理论(DFT)研究了硝酸酯增塑聚醚(NEPE)推进剂/衬层粘合界面的反应机理,评估了界面结构中不同组分之间的反应途径和过渡态结构,包括聚乙二醇(PEG)、甘油(GO)、三乙醇胺(TEA)、N,N,N′,N′-四(2-羟乙基)乙二胺(THEED)、甲苯二异氰酸酯(TDI)、异佛尔酮二氰酸酯(IPDI)和多官能度异氰酸酯(N-100);得到不同组分间反应路径的吉布斯自由能曲线。结果表明,TDI与PEG、GO、TEA和THEED之间的反应竞争性发生在第二步修饰反应,即第二个—NCO基团与端羟基的氢转移反应生成产物——聚氨酯;含羟基化合物中端羟基的增多有利于与2,4-TDI反应,但对2,6-TDI体系影响不大。此外,对比相关基元反应决速步的反应速率常数可知,2,4-TDI体系的反应速率常数大多高于2,6-TDI体系、IPDI体系和N-100体系,基元反应PEG+INT1较易发生,而基团反应N-100/THEED最慢发生。

关键词： NEPE固体推进剂衬层界面结构密度泛函理论基元反应

A Solvent-Free Covalent Organic Framework Single-Ion Conductor Based on Ion-Dipole Interaction for All-Solid-State Lithium Organic Batteries

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Nano-Micro Letters 2024年第12期16卷 189-200页

作者： Zhongping Li Kyeong-Seok Oh Jeong-Min Seo Wenliang Qin Soohyoung Lee lipeng Zhai Changqing Li Jong-Beom Baek sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-GilEonyang-EupUlju-GunUlsan 44919Republic of Korea Henan Key Laboratory of Functional Salt Materials Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007People’s Republic of China Department of Battery Conflation Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea Department of Battery Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea

Single-ion conductors based on covalent organic frameworks(COFs)have garnered attention as a potential alternative to currently prevalent inorganic ion conductors owing to their structural uniqueness and chemical ***,the sluggish Li+conduction has hindered their practical ***,we present a class of solvent-free COF single-ion conductors(Li-COF@P)based on weak ion-dipole interaction as opposed to traditional strong ion-ion *** ion(Li+from the COF)-dipole(oxygen from poly(ethylene glycol)diacrylate embedded in the COF pores)interaction in the Li-COF@P promotes ion dissociation and Li+migration via directional ionic *** by this single-ion transport behavior,the Li-COF@P enables reversible Li plating/stripping on Li-metal electrodes and stable cycling performance(88.3%after 2000 cycles)in organic batteries(Li metal anode||5,5’-dimethyl-2,2’-bis-p-benzoquinone(Me2BBQ)cathode)under ambient operating conditions,highlighting the electrochemical viability of the Li-COF@P for all-solid-state organic batteries.

关键词： Solid organic single-ion conductors Solvent-free covalent organic frameworks All-solid-state Li organic batteries Ion-dipole interaction Pore functionalization

Optimization Control of Multi-Mode Coupling All-Wheel Drive System for Hybrid Vehicle

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 340-355页

作者： lipeng Zhang Zijian Wang Liandong Wang Changan Ren School of Vehicle and Energy Yanshan UniversityQinhuangdao 066004China

The all-wheel drive(AWD)hybrid system is a research focus on high-performance new energy vehicles that can meet the demands of dynamic performance and passing *** optimization of the power and economy of hybrid vehicles becomes an issue.A unique multi-mode coupling(MMC)AWD hybrid system is presented to realize the distributed and centralized driving of the front and rear axles to achieve vectored distribution and full utilization of the system power between the axles of *** on the parameters of the benchmarking model of a hybrid vehicle,the best model-predictive control-based energy management strategy is ***,the drive system model was built after the analysis of the MMC-AWD’s drive ***,three fundamental strategies were established to address power distribution adjustment and battery SOC maintenance when the SOC changed,which was followed by the design of a road driving force ***,the energy consumption rate in the average time domain was processed before designing the minimum fuel consumption controller based on the equivalent fuel consumption ***,the advantage of the MMC-AWD was confirmed by comparison with the dynamic performance and economy of the BYD Song PLUS *** findings indicate that,in comparison to the comparative hybrid system at road adhesion coefficients of 0.8 and 0.6,the MMC-AWD’s capacity to accelerate increases by 5.26%and 7.92%,*** the road adhesion coefficient is 0.8,0.6,and 0.4,the maximum climbing ability increases by 14.22%,12.88%,and 4.55%,*** a result,the dynamic performance is greatly enhanced,and the fuel savings rate per 100 km of mileage reaches 12.06%,which is also very *** proposed control strategies for the new hybrid AWD vehicle can optimize the power and economy simultaneously.

关键词： Hybrid vehicle All-wheel drive Multi-mode coupling Energy management Model predictive control

A LiDAR Point Clouds Dataset of Ships in a Maritime Environment

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1681-1694页

作者： Qiuyu Zhang lipeng Wang Hao Meng Wen Zhang Genghua Huang the College of Intelligent Systems Science and Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

For the first time, this article introduces a LiDAR Point Clouds Dataset of Ships composed of both collected and simulated data to address the scarcity of LiDAR data in maritime applications. The collected data are acquired using specialized maritime LiDAR sensors in both inland waterways and wide-open ocean environments. The simulated data is generated by placing a ship in the LiDAR coordinate system and scanning it with a redeveloped Blensor that emulates the operation of a LiDAR sensor equipped with various laser beams. Furthermore,we also render point clouds for foggy and rainy weather conditions. To describe a realistic shipping environment, a dynamic tail wave is modeled by iterating the wave elevation of each point in a time series. Finally, networks serving small objects are migrated to ship applications by feeding our dataset. The positive effect of simulated data is described in object detection experiments, and the negative impact of tail waves as noise is verified in single-object tracking experiments. The Dataset is available at https://***/zqy411470859/ship_dataset.

关键词： 3D point clouds dataset dynamic tail wave fog simulation rainy simulation simulated data

Combustion and Self-Desulfurization Characterization of Blended Low-Rank Coals for Improved Resource Utilization in Fluidized Bed Boilers

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Journal of Thermal Science 2024年第3期33卷 1242-1256页

作者： SU lipeng ZHANG Cong ZHANG Yongsheng WANG Tao WANG Jiawei Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationNorth China Electric Power UniversityBeijing102206China

The co-combustion of low-rank coals through fluidized bed boiler(CFB)is an effective approach to enhance the level of resource *** date,there has been a lack of investigation concerning the co-combustion kinetics and self-desulfurization characteristics of coal slime,coal gangue,and raw *** this study,we adopted multiple model-free and model-fitting methods to comparatively analyze co-combustion kinetics of blended coals on the basis of thermogravimetric ***,the sulfur balance and self-desulfurization of blended coals in the co-combustion were intensively investigated using a tube furnace *** results reveal that in the presence of coal gangue in blended coals,the average activation energy(E_(a))falls within the range of 65.7 kJ/mol to 100.4 kJ/mol,as determined by four model-free ***,in the absence of coal gangue,only the Flynn-Wall-Ozawa(FWO)and Friedman(FM)methods are deemed appropriate for calculating the average E_(a),yielding a value of 77.3 kJ/*** first order reaction model is confirmed to be reliable for analyzing the co-combustion kinetics of low-rank blended *** of the specific composition of the blended coal,a significant linear correlation exists between the Ea and the natural logarithm of the pre-exponential factor(lnA)within an extensive range of ***,the addition of coal gangue to the blended coal substantially enhances the self-desulfurization level,resulting in an increase from 25.7%to60.7%at 1073 *** self-desulfurization efficiency exhibits a good linear relationship with both the mass ratio of coal gangue to coal slime and the molar ratio of calcium to *** a practical implementation,the optimal addition ratio of coal gangue is a trade-off between the self-desulfurization efficiency and the ignition capacity.

关键词： coal slime coal gangue fluidized bed boilers self-desulfurization resource utilization

Genetic insights into adaptation of alfalfa

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Molecular Plant 2024年第8期17卷 1170-1171页

作者： Yafei Guo lipeng Kang Fei Lu State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina Key Laboratory of Seed Innovation Institute of Genetics and Developmental BiologyChineseAcademyof SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina CAS-JIC Centre of Excellence for Plant and Microbial Science(CEPAMS) Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina

Climate change is increasingly affecting agricultural outputs,as evidenced by the changing global temperature and extreme weather events that significantly impact crop yields(Lesk et al.,2016).To address this challenge,there is a growing interest in developing crops that can endure these adverse conditions to ensure food *** examples in nature show how crops have adapted to diverse environments(Gutaker and Purugganan,2023),leaving behind a rich genomic *** genomics has started to provide insights into these adaptive processes from evolutionary and genetic perspectives(Savolainen et al.,2013;Aguirre-Liguori et al.,2021;sang et al.,2022).Recently,Zhang et al.(Zhang et al.,2024)investigated alfalfa(Medicago sativa ***),known as the"queen of forages,"for its broad *** analyzing whole-genome sequencing data of 702 accessions from 24 Medicago species,this study enriches our understanding of how to develop crops and meet the challenges of climate change.

关键词： sativa crops environments

ROS-responsive hydrogels with spatiotemporally sequential delivery of antibacterial and anti-inflammatory drugs for the repair of MRSA-infected wounds

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Regenerative Biomaterials 2024年第1期3卷 119-131页

作者： Bowen Qiao Jiaxin Wang lipeng Qiao Aziz Maleki Yongping Liang Baolin Guo Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Mechanical Behavior of Materials Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Zanjan Pharmaceutical Nanotechnology Research Center(ZPNRC) Zanjan 45139-56184Iran Department of Orthopaedics The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061People’s Republic of China

For the treatment of MRSA-infected wounds,the spatiotemporally sequential delivery of antibacterial and anti-inflammatory drugs is a promising *** this study,ROS-responsive HA-PBA/PVA(HPA)hydrogel was prepared by phenylborate ester bond cross-linking between hyaluronic acid-grafted 3-amino phenylboronic acid(HA-PBA)and polyvinyl alcohol(PVA)to achieve spatiotemporally controlled release of two kinds of drug to treat MRSA-infected *** hydrophilic antibiotic moxifloxacin(M)was directly loaded in the *** hydrophobic curcumin(Cur)with anti-inflammatory function was first mixed with Pluronic F127(PF)to form Cur-encapsulated PF micelles(Cur-PF),and then loaded into the HPA *** to the different hydrophilic and hydrophobic nature of moxifloxacin and Cur and their different existing forms in the HPA hydrogel,the final HPA/M&Cur-PF hydrogel can achieve different spatiotemporally sequential delivery of the two *** addition,the swelling,degradation,self-healing,antibacterial,anti-inflammatory,antioxidant property,and biocompatibility of hydrogels were ***,in the MRSA-infected mouse skin wound,the hydrogel-treated group showed faster wound closure,less inflammation and more collagen *** experiments further confirmed that the hydrogel promoted better repair by reducing inflammation(TNF-a)and promoting vascular(VEGF)*** conclusion,this HPA/M&CurPF hydrogel that can spatiotemporally sequential deliver antibacterial and anti-inflammatory drugs showed great potential for the repair of MRSA-infected skin wounds.

关键词： MRSA-infected wounds spatiotemporally sequential delivery antibacterial anti-inflammatory

Selenium-oxidizing Agrobacterium sp.T3F4 decreases arsenic uptake by Brassica rapa *** a native polluted soil

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Journal of Environmental Sciences 2024年第4期138卷 506-515页

作者： Lijin An Chunzhi Zhou lipeng Zhao Ao Wei Yiting Wang Huimin Cui Shixue Zheng State Key Laboratory of Agricultural Microbiology College of Life Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China

Toxic arsenic(As)and trace element selenium(Se)are transformed by microorganisms but their complex interactions in soil-plant systems have not been fully *** Asand Se-oxidizing bacterium,Agrobacterium sp.T3F4,was applied to a native seleniferous As-polluted soil to investigate As/Se uptake by the vegetable Brassica rapa *** As-Se interaction as mediated by strain *** Se content in the aboveground plants was significantly enhanced by 34.1%,but the As content was significantly decreased by 20.5% in the T3F4-inoculated pot culture compared to the control(P<0.05).Similar result was shown in treatment with additional 5 mg/kg of Se(IV)in *** addition,the As contents in roots were significantly decreased by more than 35% under T3F4 or Se(IV)treatments(P<0.05).Analysis of As-Se-bacterium interaction in a soil simulation experiment showed that the bioavailability of Se significantly increased and As was immobilized with the addition of the T3F4strain(P<0.05).Furthermore,an As/Se co-exposure hydroponic experiment demonstrated that As uptake and accumulation in plants was reduced by increasing Se(IV)*** 50% growth inhibition concentration(IC50)values for As in plants were increased about one-fold and two-fold under co-exposure with 5 and 10μmol/L Se(IV),*** conclusion,strain T3F4 improves Se uptake but decreases As uptake by plants via oxidation of As and Se,resulting in decrease of soil As bioavailability and As/Se competitive absorption by *** provides a potential bioremediation strategy for Se biofortification and As immobilization in As-polluted soil.

关键词： Selenium oxidation Selenium biofortification Arsenite-oxidizing bacteria Arsenic immobilization Brassica rapa L

Serum procalcitonin levels are associated with rhabdomyolysis following exertional heatstroke: an over 10-year intensive care survey

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World Journal of Emergency Medicine 2024年第1期15卷 23-27页

作者： Li Zhong Feifei Shuai Conglin Wang lipeng Han Zhifeng Liu Ming Wu Department of Traditional Chinese Medicine the First Affi liated HospitalGuizhou University of Chinese MedicineGuiyang 550001China Department of Medical Critical Care Medicine General Hospital of Southern Theatre Command of People’s Liberation ArmyGuangzhou 510010China Department of Infection and Critical Care Medicine Shenzhen Second People’s Hospital&First Affi liated Hospital of Shenzhen UniversityHealth Science CenterShenzhen 518035China Department of Nosocomial Infection Prevention and Control Shenzhen Second People’s HospitalShenzhen 518035China Key Laboratory of Hot Zone Trauma Care and Tissue Repair of People's Liberation Army General Hospital of Southern Theatre Command of People's Liberation ArmyGuangzhou 510010China

BACKGROUND:Heatstroke has become a common emergency event in ***(PCT)is used as a biomarker of infection in the emergency department(ED),but its role in rhabdomyolysis(RM)following exertional heatstroke(EHS)remains ***:A retrospective cohort study enrolled patients with EHS from the intensive care unit(ICU).We collected RM biomarkers,inflammation markers,critical disease scores at admission,24 h,48 h,and discharge,and 90-day *** analysis,linear regression and curve fi tting were used to identify the relationship between PCT and ***:A total of 162 patients were recruited and divided into RM(n=56)and non-RM(n=106)*** was positively correlated with myoglobin(Mb),acute hepatic injury,disseminated intravascular coagulation(DIC),Sequential Organ Failure Assessment(SOFA)score,and Acute Physiology and Chronic Health Evaluation II(APACHE II)score,with correlation coefficients of 0.214,0.237,0.285,0.454,and 0.368,respectively(all P<0.05).Interestingly,the results of curve fi tting revealed a nonlinear relationship between PCT and RM,and a two-piecewise linear regression model showed that PCT was related to RM with an odds ratio of 1.3 and a cut-off of<4.6 ng/*** analysis revealed that RM was associated with higher mortality compared to non-RM cases(P=0.0093).CONCLUSION:High serum PCT concentrations are associated with RM after EHS in critically ill *** PCT concentrations should be interpreted cautiously in patients with EHS in the ED.

关键词： Procalcitonin Myoglobin Rhabdomyolysis Exertional heatstroke