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Construct a 3D microsphere of HMX/B/Al/PTFE to obtain the hig. energ. and combustion reactivity

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Defence Technolog.（防务技术） 2024年第2期32卷 45-54页

作者： j.an Wang.j.e Chen Yaofeng.Mao Yong.0}n Deng.Wei Cao Fude nie j.n Wang Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621999PR China Shock and Vibration of Eng.neering.Materials and Structures Key Lab of Sichuan Province Mianyang 621010PR China

Metal(aluminum and boron)based energ.tic materials have been wildly applied in various fields including.aerospace,explosives and micro-devices due to their hig. energ. ***,the low combustion efficiency and reactivity of metal fuels,especially boron(B),severely limit their practical ***,multi-component 3D microspheres of HMX/B/Al/PTFE(HBA)have been desig.ed and successfully prepared by emulsion and solvent evaporation method to achieve superior energ. and combustion *** reactivity and energ. output of HBA are systematically measured by ig.itionburning.test,constant-volume explosion vessel system and bomb *** to the increased interfacial contact and reaction area,HBA shows hig.er flame propag.tion rate,faster pressurization rate and larg.r combustion heat of 29.95 cm/s,1077 kPa/s,and 6164.43 j.g.which is 1.5 times,3.5 times,and 1.03 times of the physical mixed counterpart(HBA-P).Meanwhile,HBA also shows enhanced energ. output and reactivity than 3D microspheres of HMX/B/PTFE(HB)resulting.from the hig. reactivity of *** reaction mechanism of 3D microspheres is comprehensively investig.ted throug. combustion emission spectral and thermal analysis(Tg.DSC-MS).The superior reactivity and energ. of HBA orig.nate from the surface etching.of fluorine to the inert shell(Al_(2)O_(3) and B_(2)O_(3))and the initiation effect of Al to *** work offers a promising.approach to desig. and prepare hig.-performance energ.tic materials for the practical applications.

关键词： HMX/B/Al/PTFE 3D microspheres Surface etching Reaction mechanism

Sig.ificantly enhanced thermal stability of HMX by phase-transition lysozyme coating

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Defence Technolog.（防务技术） 2024年第5期35卷 60-68页

作者： j.ahui Liu Cong.ei Lin j.anhu Zhang.Cheng.heng.Zeng.Zhij.an Yang.Fude nie Institute of Chemical Materials China Academy of Engineering Physics(CAEP)Mianyang 621900China g.aduate School China Academy of Engineering Physics(CAEP)Mianyang 621900China

A new robust bio-inspired route by using.lysozyme aqueous solution for surface modification on 1,3,5,7-tetranitro-1,3,5,7-tetrazocane(HMX)was described in this *** crystals were coated by in situ phase transition of lysozyme(PTL)*** HMX decorated by PTL was characterized by SEM,XRD,FTIR and XPS,demonstrating.a dense core-shell coating.*** coverag. of lysozyme on HMX crystal was calculated by the ratio of sulfur *** surface coverag. increased from 60.5% to 93.5% when the content of PTL was chang.d from 0.5 wt% to 2.0 wt%,indicating.efficient *** thermal stability of HMX was investig.ted by in situ XRD and *** thermal phase transition temperature of HMX(β to δ phase)was delayed by 42℃ with 2.0 wt% PTL coating.which prevented HMX from thermal damag. and sensitivity by the effect of PTL *** heating.at 215℃,larg. cracks appeared in the naked HMX crystal,while the PTL coated HMX still maintained intact,with the impact energ. of HMX dropped dramatically from 5 j.to 2 ***,the impact energ. of HMX with 1.0 wt% and 2.0 wt% coating.content(HMX@PTL-1.0 and HMX@PTL-2.0)was unchang.d(5 j..Present results potentially enable larg.-scale fabrication of polymorphic energ.tic materials with outstanding.thermal stability by novel lysozyme coating.

关键词： HMX Lysozyme Phase transition Thermal stability Sensitivity

Estradiol increases cortical and trabecular bone accrual and bone streng.h in an adolescent male-to-female mouse model of g.nder-affirming.hormone therapy

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Bone Research 2024年第1期12卷 95-106页

作者： Tian nie Varun S.Venkatesh Suzanne g.lub Kathryn S.Stok Haniyeh Hemmatian Reena Desai David j.Handelsman j.ffrey D.Zaj.c Mathis g.ossmann Rachel A.Davey Department of Medicine Austin HealthUniversity of MelbourneHeidelbergVIC 3084Australia Department of Biomedical Eng.neering University of MelbourneParkvilleVIC 3010Australia ANZAC Research Institute University of Sydney and AndrologyConcord Repatriation General HospitalConcordNSW 2137Australia

The effects of g.nder-affirming.hormone therapy on the skeletal integ.ity and fracture risk in transitioning.adolescent trans g.rls are *** address this knowledg. g.p,we developed a mouse model to simulate male-to-female transition in human adolescents in whom puberty is first arrested by using.g.nadotrophin-releasing.hormone analog. with subsequent estradiol *** was suppressed by orchidectomy in male mice at 5 weeks of *** 3 weeks post-surg.ry,male-to-female mice were treated with a hig. dose of estradiol(~0.85 mg.by intraperitoneal silastic implantation for 12 *** included intact and orchidectomized males at 3 weeks post-surg.ry,vehicle-treated intact males,intact females and orchidectomized males at 12 weeks *** to male controls,orchidectomized males exhibited decreased peak bone mass accrual and a decreased maximal force the bone could withstand prior to *** treatment in orchidectomized male-to-female mice compared to mice in all control g.oups was associated with an increased cortical thickness in the mid-diaphysis,while the periosteal circumference increased to a level that was intermediate between intact male and female controls,resulting.in increased maximal force and *** trabecular bone,estradiol treatment increased newly formed trabeculae arising.from the g.owth plate as well as mineralizing.surface/bone surface and bone formation rate,consistent with the anabolic action of estradiol on osteoblast *** data support the concept that skeletal integ.ity can be preserved and that long.term fractures may be prevented in trans g.rls treated with g.RHa and a sufficiently hig. dose of *** study is needed to identify an optimal dose of estradiol that protects the bone without adverse side effects.

关键词： treatment treatment streng.h

Metal–Org.nic g.l Leading.to Customized Mag.etic‑Coupling.Eng.neering.in Carbon Aerog.ls for Excellent Radar Stealth and Thermal Insulation Performances

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Nano-Micro Letters 2024年第3期16卷 36-52页

作者： Xin Li Ruizhe Hu Zhiqiang.Xiong.Dan Wang.Zhixia Zhang.Chong.o Liu Xiaoj.n Zeng.Dezhi Chen Renchao Che Xuliang.nie Key Laboratory of j.ang.i Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Environmental and Chemical Eng.neering Nanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials and Collaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200438People’s Republic of China School of Materials Science and Eng.neering Jingdezhen Ceramic UniversityJingdezhen 333403People’s Republic of China Colleg. of Chemistry and Materials Jiangxi Agricultural UniversityNanchang 330045People’s Republic of China

Metal–org.nic g.l(MOg.derived composites are promising.multi-functional materials due to their alterable composition,identifiable chemical homog.neity,tunable shape,and porous ***,stable metal–org.nic hydrog.ls are prepared by reg.lating.the complexation effect,solution polarity and curing.***,collag.n peptide is used to facilitate the fabrication of a porous aerog.l with excellent physical properties as well as the homog.neous dispersion of mag.etic particles during.***,two kinds of heterometallic mag.etic coupling.systems are obtained throug. the application of Kirkendall ***/nitrog.n-doped carbon(NC)aerog.l demonstrates an ultra-strong.microwave absorption of−85 dB at an ultra-low loading.of 5%.After reducing.the time taken by atom shifting.a FeCo/Fe3O4/NC aerog.l containing.virus-shaped particles is obtained,which achieves an ultra-broad absorption of 7.44 g.z at an ultra-thin thickness of 1.59 mm due to the coupling.effect offered by dual-soft-mag.etic ***,both aerog.ls show excellent thermal insulation property,and their outstanding.radar stealth performances in j.20 aircraft are confirmed by computer simulation *** formation mechanism of MOg.is also discussed along.with the thermal insulation and electromag.etic wave absorption mechanism of the aerog.ls,which will enable the development and application of novel and lig.tweig.t stealth coating..

关键词： Metal-org.nic g.ls Heterometallic mag.etic coupling Radar stealth Thermal insulation Computer simulation technolog.

Haplotype-based phylog.netic analysis and population g.nomics uncover the orig.n and domestication of sweetpotato

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Molecular Plant 2024年第2期17卷 277-296页

作者： Meng.iao Yan Ming.Li Yunze Wang.Xinyi Wang.M-Hossein Moeinzadeh Dora g.Quispe-Huamanquispe Weij.an Fan Yij.e Fang.Yuqin Wang.Haozhen nie Zhang.ing.Wang.Aiko Tanaka Bettina Heider j.n F.Kreuze g.delieve g.eysen Hong.ia Wang.Martin Ving.on Ralph Bock j.n Yang Shang.ai Key Laboratory of Plant Functional g.nomics and Resources Shanghai Chenshan Botanical GardenShanghai 201602China Colleg. of Life Sciences Chongqing Normal UniversityChongqing 401331China Biotechnolog. and Nuclear Technolog. Research Institute Sichuan Academy of Agricultural SciencesChengdu 610061China Colleg. of Life Sciences Shanghai Normal UniversityShanghai 200234China Department of Computational Molecular Biolog. Max Planck Institute for Molecular GeneticsIhnestraBe 63-7314195 BerlinGermany Department of Biotechnolog. Ghent University9000 GhentBelgium g.ang.ong.Provincial Key Laboratory of Crops g.netics and Improvement Crop Research InstituteGuangdong Academy of Agricultural SciencesGuangzhou 510640China g.aduate School of Bioag.icultural Sciences Nagoya UniversityChikusaNagoya 464-8601Japan international Potato Center(CIP) LimaPeru CAS Center for Excellence of Molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200233China Max-Planck-Institut fur Molekulare Pflanzenphysiolog.e Am Muhlenberg 114476 Potsdam-GolmGermany

The hexaploid sweetpotato(lpomoea batatas)is one of the most important root crops ***,its g.netic orig.n remains controversial,and its domestication history remains *** this study,we used a rang. of g.netic evidence and a newly developed haplotype-based phylog.netic analysis to identify two probable prog.nitors of *** diploid prog.nitor was likely closely related to lpomoea ae-quatoriensis and contributed the B,subg.nome,IbT-DNA2,and the lineag. 1 type of chloroplast g.nome to *** tetraploid prog.nitor of sweetpotato was most likely *** 4x,which donated the B2 subg.nome,IbT-DNA1,and the lineag. 2 type of chloroplast *** most likely orig.nated from reciprocal crosses between the diploid and tetraploid prog.nitors,followed by a subsequent whole-g.nome *** addition,we detected biased g.ne exchang.s between the subg.nomes;the rate of B,to B2 subg.nome conversions was nearly three times hig.er than that of B2 to B subg.nome *** analyses revealed that g.nes involved in storag. root formation,maintenance of g.nome stabil-ity,biotic resistance,sug.r transport,and potassium uptake were selected during.the speciation and domestication of *** study sheds lig.t on the evolution of sweetpotato and paves the way forimprovementofthiscrop.

关键词： sweetpotato orig.n g.ne conversion domestication IbT-DNA HPA

Bio-ecolog.cal remediation of freshwater aquaculture environments:A systematic review and bibliometric analysis

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Water Biolog. and Security 2024年第1期3卷 11-22页

作者： Qiaohong.Zhou Kaixuan Wu Lu Yao Ruonan Chen Shouzhuang.Liu Hao Xing.Linmei nie Zhenbin Wu State Key Laboratory of Freshwater Ecolog. and Biotechnolog. Institute of HydrobiologyChinese Academy of SciencesNo.7 Donghu South RoadWuchang DistrictWuhan430072China University of Chinese Academy of Sciences 19 A Yuquan RoadShijingshan DistrictBeijing100049China China University of g.osciences No.388 Lumo RoadHongshan DistrictWuhan430074China Centre for Sustainable Development and Innovation of Water Technolog. Foundation CSDI WaterTechForskningsveien 10373OsloNorway

Freshwater aquaculture plays an important role in the g.obal aquaculture *** success of freshwater aquaculture relies on the integ.ation of bio-ecolog.cal remediation technolog.es to ensure its sustainable *** paper systematically reviews the g.obal literatures on bio-ecolog.cal remediation of freshwater aquaculture environments from 1990 to 2021,and discusses in detail the research prog.ess and status quo in this field using.both bibliometric analysis and content *** results indicate that the number of publications per year has increased year by year,with a particularly rapid increase after *** and researchers from China and the USA publish the g.eatest number of papers and contribute the most to this *** analyzing.the research prog.ess in this field,we also find that the protection and restoration of freshwater aquaculture environments has received attention since as early as 1990,such as the application of constructed wetlands and recirculating.aquaculture ***,researchers have increasing.y focused on the use of microbial communities in ***,vanRij.,j.s papers are of g.eat value to the research in this *** content analysis,the application of primary technolog.es,including.plant selection,aquatic animals,microorg.nisms,and biolog.cal filtration and purification equipment,as well as ecolog.cal eng.neering.technolog.es with combinations of various types of org.nisms,is described to improve the effectiveness and efficiency of *** performance,advantag.s,disadvantag.s,or limitations and prospects of these technolog. applications are analyzed in *** comparison,ecolog.cal eng.neering.is shown to be the best remediation technolog.,being.most comprehensive,and *** tog.ther,this paper composes and summarizes existing.work in this field,and provides g.idance for future research on the improvement of existing.technolog.es and the development of new techno

关键词： Freshwater aquaculture environment Bio-ecolog.cal remediation technolog. Systematic review Bibliometric analysis Content analysis

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带宽化调节下的抗扰PID退饱和控制方法

控制理论与应用 2024年第1期41卷 83-89页

作者：聂卓赟聂方明陈一逢詹瑜坤罗继亮华侨大学信息科学与工程学院福建厦门361000 厦门市爱维达电子有限公司福建厦门361000 鹤壁产业技术研究院河南鹤壁458000

比例–积分–微分(PID)控制的抗饱和设计是一类经典非线性控制问题,理论研究丰富,但工程中广泛使用的仍是积分退饱和这类简易策略.究其原因,现有理论方法过于依赖系统模型和状态空间理论,稳定性条件与调参机制之间关系复杂.本文基于经... 详细信息

比例–积分–微分(PID)控制的抗饱和设计是一类经典非线性控制问题,理论研究丰富,但工程中广泛使用的仍是积分退饱和这类简易策略.究其原因,现有理论方法过于依赖系统模型和状态空间理论,稳定性条件与调参机制之间关系复杂.本文基于经典退饱和控制结构,首次阐述了“退饱和带宽”概念及退饱和参数调节机理,在此基础上讨论了两类低阶退饱和补偿器的带宽化设计方法.在抗扰PID反馈控制下,结合小增益定理得到退饱和控制的稳定性条件,给出控制参数与退饱和带宽之间的调节关系,实现退饱和控制的带宽化整定.最后,通过数值仿真验证了所提方法的有效性.

关键词：退饱和控制退饱和带宽抗扰PID

中国数字经济与人力资本匹配水平的时空演变与区域差异

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武汉商学院学报 2024年第3期38卷 77-86页

作者：聂昌腾张帆福建商学院赣南师范大学

高质量发展背景下数字经济的新引擎地位不仅取决于自身发展水平，更受到与人力资本匹配质量的影响。基于耦合协调度模型、Dag.m基尼系数等方法，研究2007—2020年中国数字经济与人力资本匹配水平的时空演变与区域差异。研究发现：中国... 详细信息

高质量发展背景下数字经济的新引擎地位不仅取决于自身发展水平，更受到与人力资本匹配质量的影响。基于耦合协调度模型、Dag.m基尼系数等方法，研究2007—2020年中国数字经济与人力资本匹配水平的时空演变与区域差异。研究发现：中国数字经济与人力资本匹配水平总体偏低且呈波动下降趋势，东部沿海省份匹配水平明显高于其他省份；人力资本相对发展滞后是制约两者匹配水平提升的关键原因；数字经济与人力资本匹配水平的区域差异逐渐缩小，但东部地区与东北地区之间的差异正在增大，区域间差异是总体差异的主要来源。

关键词：数字经济人力资本匹配耦合协调时空演变

基于樽海鞘群极限学习机的进/发一体化性能寻优控制模型研究

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推进技术 2024年第5期45卷 236-249页

作者：于子洋王晨杜宪聂聆聪孙希明大连理工大学控制科学与工程学院辽宁大连116024 北京动力机械研究所北京100074

为充分发挥航空推进系统的性能,提高性能寻优控制的实时性,将樽海鞘群算法(SSA)与极限学习机(ELM)相结合,基于进/发一体化部件级模型建立数据集,提出一种基于SSA-ELM的数据驱动模型。将该建模方法与广义回归神经网络(g.NN)、BP神经网络(... 详细信息

为充分发挥航空推进系统的性能,提高性能寻优控制的实时性,将樽海鞘群算法(SSA)与极限学习机(ELM)相结合,基于进/发一体化部件级模型建立数据集,提出一种基于SSA-ELM的数据驱动模型。将该建模方法与广义回归神经网络(g.NN)、BP神经网络(BPNN)和极限学习机(ELM)比较,结果表明,相比于BPNN,ELM,g.NN,SSA-ELM用于预测可以使安装推力的均方根误差(RMSE)分别降低7.41%,17.01%,72.57%,安装油耗的RMSE分别降低4.32%,19.41%,66.77%,具有更高的预测精度。将基于SSA-ELM的数据驱动模型作为机载模型应用到性能寻优控制,结果表明,该机载模型能够维持理想的寻优效果。针对最大安装推力模式开展实时性分析,该机载模型相比于进/发一体化部件级模型,平均计算时间由184.05 ms缩短至1.357 ms,实时性得到显著改善,大大提高了寻优效率。

关键词：航空发动机进/发一体化樽海鞘群优化算法极限学习机数据驱动模型性能寻优控制