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The dynamic response of a high-density polyethylene slow-release structure under launching overload

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Defence Technology（防务技术） 2023年第8期26卷 143-156页

作者： ke-Bin zhang wen-Bin Li Yu Zheng wen-Jin Yao Chang-Fang Zhao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China

Based on the 60 mm artillery grenade,a slow-release structure was designed to reduce the severity of ammunitions response to accidental thermal stimulation and improve the thermal stability of *** slow-release structure was made of high-density polyethylene(HDPE) and connected the fuse and the projectile body through internal and external *** study the safety of the slowrelease structure under artillery launching overload,mechanical analysis of the slow-release structure was simulated via finite element analysis(FEA).The impacts of various factors(e.g.,fuse mass,number of threads,and nominal diameter of internal threads of the slow-release structure) on the connection strength of the slow-release structure were studied.A strength-prediction model based on the fuse mass and internal thread parameters was established by fitting the maximum effective stress of the slowrelease *** led to good prediction *** conclusion,this study provides references and theoretical support for the design of thermal protection structures insensitive to ammunition.

关键词： Artillery ammunition HDPE Finite element analysis Slow-release structure Threaded connection

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan zhang Xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing zhang Yongzheng zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui zhang Zhi-Lai Zhan Guang-Lu Chang Yan Gao Xia Li wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

Partial organic substitution weakens the negative effect of chemical fertilizer on soil micro-food webs

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Journal of Integrative Agriculture 2022年第10期21卷 3037-3050页

作者： LIU Han-wen zhang Xiao-ke zhang Gui-zong KOU Xin-chang LIANG wen-ju Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China School of Geographical Science Northeast Normal UniversityChangchun 130024P.R.China

Soil biotic communities play vital roles in enhancing soil nutrient cycling and soil ***-term excessive nitrogen(N)application is disadvantageous to the stability of soil food webs and affects arable soil health and sustainable *** organic substitution is essential to improve soil health and alleviate the disadvantages of excessive chemical ***,the biological effects of various organic amendments on soil micro-food webs are poorly *** order to explore the effects of various organic amendments including stover,biochar and manure on soil micro-food webs(microbial and nematode communities),a field plot experiment with maize having five treatments viz.,100%urea(100%N),70%urea(70%N),70%urea plus stover(Stover),70%urea plus cattle manure(Manure)and 70%urea plus biochar(Biochar)was *** treatment increased the carbon(C)to N use efficiency of soil microbes,which contributed to the retention of soil C,while Biochar treatment elevated soil organic C(SOC)and soil p ***,Biochar treatment mitigated the negative effects of soil acidification on the soil micro-food web and reduced the abundance of plant ***,the biological effect of organic amendments was distinguished from chemical fertilization(100%N and 70%N)through principal co-ordinates *** relationships among soil properties,microbial and nematode biomass in the 100%N treatment were diminished in treatments where chemical fertilizer was *** bottom-up effects on soil food webs were observed in organic substitution *** conclusion,organic amendments improved soil fertility by regulating soil microbial and nematode communities in the cropland ecosystem,alleviated the negative effects of chemical fertilizer on the micro-food webs and controlled the trophic cascades among soil biota.

关键词： microbial community nematode community soil micro-food webs organic substitution chemical fertilizer soil health

Degradable magnesium alloy suture promotes fibrocartilaginous interface regeneration in a rat rotator cuff transosseous repair model

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Journal of Magnesium and Alloys 2024年第1期12卷 384-393页

作者： Baoxiang zhang wen zhang Fei zhang Chao Ning Mingyang An ke Yang Lili Tan Qiang zhang Department of Sports Medicine Chinese PLA General HospitalBeijing 100853China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Medical School of PLA Beijing 100853China Institute of Orthopedics Chinese PLA General HospitalBeijing Key Lab of Regenerative Medicine in OrthopedicsKey Lab of Musculoskeletal Trauma&War Injuries of Chinese PLABeijing 100853China

Despite transosseous rotator cuff tear repair using sutures is widely accepted for tendon-bone fixation,the fibrocartilaginous enthesis regeneration is still hardly achieved with the traditional *** the present work,degradable magnesium(Mg)alloy wire was applied to suture supraspinatus tendon in a rat acute rotator cuff tear model with Vicryl Plus 4±0 absorbable suture as *** shoulder joint humerus-supraspinatus tendon complex specimens were retrieved at 4,8,and 12 weeks after *** Mg alloy suture groups showed better biomechanical properties in terms of ultimate load to *** observation showed that hyperplastic response of the scar tissue at the tendon-bone interface is progressively alleviated over time in the both Mg alloy suture and Vicryl suture *** the histological analysis,for Mg alloy suture groups,chondrocytes appear to proliferate at 4 weeks postoperatively,and the tendon-bone interface showed an orderly structural transition zone at 8 weeks *** collagenous fiber tended to be aligned and the tendon-bone interlocking structures apparently formed,where transitional structure from unmineralized fibrocartilage to mineralized fibrocartilage was closer to the native fibrocartilaginous *** vivo degradation of the magnesium alloy wire was completed within 12 *** results indicated that Mg alloy wire was promising as degradable suture with the potential to promotes fibrocartilaginous interface regeneration in rotator cuff repair.

关键词： Rotator cuff repair Mg alloy wire Tendon-bone healing Fibrocartilaginous interface

Flow-visualization and numerical investigation on the optimum design of cavitating jet nozzle

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Petroleum Science 2022年第5期19卷 2284-2296页

作者： Xiao-Ya Wu Yi-Qun zhang Ya-wen Tan Gen-Sheng Li ke-wen Peng Bo zhang State key Laboratory of Petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing 102249China Guangdong Provincial key Laboratory of Distributed Energy Systems Dongguan University of TechnologyDongguan 523808GuangdongChina Department of Civil and Environmental Engineering University of AlbertaEdmontonAlberta T6G 2G7Canada

Cavitating jet is widely used in drilling,rock cutting and ocean re source exploitation because of its stro ng erosion *** analysis of the relationship between the flow characteristics and the structure of cavitating jet nozzle is ***,we utilized 3 D printed technology and high-speed photography to design visualization experime nts to analyse the impact of the variation of resonator and throat size of the organ-pipe self-resonating cavitating nozzles on the cavitation characteristics through image *** velocity field,pressure field and vapor volume fraction injected by the nozzle were taken as the objective functions to study the influence of different structural parameters on the cavitation effect based on FLUENT 19.0 software,and the results were compared with the experimental *** results show that increasing the length and diameter of the resonator contributes to the occurrence of cavitation and the structure stability of the flow ***,excessive size affects self-resonant of the nozzle and makes it difficult to form resonance *** this study,the optimal values of nozzle throat length and divergent angle are twice the throat diameter and 40°,*** research provides an integrated research method to study the optimization of self-resonating nozzle and cavitating jet characteristics.

关键词： Cavitating jet Self-resonating cavitating nozzle Visualization Computational fluid dynamics Structure optimization

Connection between Volterra series and perturbation method in nonlinear systems analyses

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Acta Mechanica Sinica 2014年第4期30卷 600-606页

作者： Xing-Jian Dong Zhi-ke Peng wen-Ming zhang Guang Meng Institute of Vibration Shock & Noise Shanghai Jiao Tong University

This paper is concerned with the connection between the Volterra series and the regular perturbation method in nonlinear systems analyses. It is revealed for the first time that, for a forced polynomial nonlinear system, if its derived linear system is a damped dissipative system, the steady response obtained through the regular perturbation method is exactly identical to the response given by the Volterra series. On the other hand, if the derived linear system is an undamped conservative system, then the Volterra series is incapable of modeling the forced polynomial nonlinear system. Numerical examples are further presented to illustrate these points. The results provide a new criterion for quickly judging whether the Volterra series is applicable for modeling a given polynomial nonlinear system.

关键词： Volterra series · Regular perturbation method ·Polynomial nonlinear systems · Nonlinear Vibration

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中国改革开放以来的高分子物理和表征研究

高分子学报 2019年第10期50卷 1047-1067页

作者：安立佳陈尔强崔树勋董侠傅强韩艳春何嘉松胡文兵胡祖明江明李宝会李良彬李林李卫华林嘉平吕中元门永锋沈志豪孙平川童真王笃金武培怡谢续明徐坚徐志康薛奇闫寿科杨玉良俞炜俞燕蕾张广照张军张俐娜张平文张文科赵江郑强周东山中国科学院长春应用化学研究所长春130022 北京大学化学与分子工程学院北京100871 西南交通大学材料先进技术教育部重点实验室成都610031 中国科学院化学研究所北京100090 四川大学高分子科学与工程学院成都610065 南京大学化学化工学院南京210023 东华大学纤维材料改性国家重点实验室上海200051 复旦大学高分子科学系上海200433 南开大学物理学院天津300071 中国科技大学国家同步辐射实验室合肥230026 北京师范大学化学学院北京100875 华东理工大学材料科学与工程学院上海200237 吉林大学理论化学研究所长春130023 华南理工大学材料科学与工程学院广州510640 清华大学化工系北京100084 浙江大学高分子科学与工程学系杭州310027 北京化工大学材料科学与工程学院北京100029 上海交通大学化学化工学院上海200240 武汉大学化学与分子科学学院武汉430072

本综述介绍了改革开放四十多年来中国大陆学者在高分子物理和表征领域所取得的部分成就.按照时间顺序,分别从概念的突破、理论的发展和技术的创新三个方面选取具有代表性研究成果进行简短的介绍,以期展示当代中国学者在这一基础研究领... 详细信息

本综述介绍了改革开放四十多年来中国大陆学者在高分子物理和表征领域所取得的部分成就.按照时间顺序,分别从概念的突破、理论的发展和技术的创新三个方面选取具有代表性研究成果进行简短的介绍,以期展示当代中国学者在这一基础研究领域所表现出来的拼搏意志和创新精神,激励新一代学者共同努力,勇攀科学高峰,为国民经济和社会发展作出更大的贡献.

关键词：高分子物理高分子表征相分离结晶流变和力学性质

Development of an enhanced online tritium monitoring system using plastic scintillation fiber array

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Nuclear Science and Techniques 2024年第10期35卷 239-249页

作者： wen-Yu Cheng ke Deng You-Shi Zeng Wei Liu Qin zhang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Tritium,a radioactive nuclide discharged by nuclear power plants,poses challenges for *** online monitoring of tritium in water is crucial for real-time radiation data,given its predominant existence in the environment as *** paper presents the design,simulation,and development of a tritium monitoring device utilizing a plastic scintillation fiber(PSF)*** validation confirmed the device’s detection efficiency and minimum detectable *** recorded detection efficiency of the device is 1.6×10^(-3),which exceeds the theoretically simulated value of 4×10^(-4)by four *** shielding,the device can achieve a minimum detectable activity of 3165 Bq L^(-1)over a 1600-second measurement *** to simulation and experimental results,enhancing detection efficiency is possible by increasing the number and length of PSFs and implementing rigorous shielding ***,reducing the diameter of PSFs can also improve detection *** minimum detectable activity of the device can be further reduced using the aforementioned methods.

关键词： Tritium Plastic scintillating fiber array Detector