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Two simple memristive maps with adaptive energy regulation and digital signal process verification

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第5期25卷 382-394页

作者： Feifei YANG lujie ren Jun MA Zhigang ZHU College of Electrical and Information Engineering Lanzhou University of TechnologyLanzhou 730050China Department of Physics Lanzhou University of TechnologyLanzhou 730050China School of Information Science and Engineering Dalian Polytechnic UniversityDalian 116034China

Mathematical models can produce desired dynamics and statistical properties with the insertion of suitable nonlinear terms,while energy characteristics are crucial for practical application because any hardware realizations of nonlinear systems are relative to energy *** involvement of memristive terms relative to memristors enables multistability and initial-dependent property in memristive *** this study,two kinds of memristors are used to couple a capacitor or an inductor,along with a nonlinear resistor,to build different neural *** corresponding circuit equations are derived to develop two different types of memristive oscillators,which are further converted into two kinds of memristive maps after linear *** Hamilton energy function for memristive oscillators is obtained by applying the Helmholz theorem or by mapping from the field energy of the memristive *** Hamilton energy functions for both memristive maps are obtained by replacing the gains and discrete variables for the memristive oscillator with the corresponding parameters and *** two memristive maps have rich dynamic behaviors including coherence resonance under noisy excitation,and an adaptive growth law for parameters is presented to express the self-adaptive property of the memristive maps.A digital signal process(DSP)platform is used to verify these *** scheme will provide a theoretical basis and experimental guidance for oscillator-to-map transformation and discrete map-energy calculation.

关键词： Hamilton energy Discrete memristor Self-adaptive regulation Digital signal process(DSP)implementation

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New insights into the sources and formation of carbonaceous aerosols in China:potential applications of dual-carbon isotopes

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National Science Review 2017年第6期4卷 804-806页

作者： Fang Cao Yanlin Zhang lujie ren Junwen Liu Jun Li Gan Zhang Di Liu Yele Sun Zifa Wang Zongbo Shi Pingqing Fu Yale-NUIST Center on Atmospheric Environment Nanjing University of Information Science and Technology LAPC Institute of Atmospheric Physics Chinese Academy of Sciences Institute of Surface-Earth System Science Tianjin University SKLOG Guangzhou Institute of GeochemistryChinese Academy of Sciences School of Geography Earth and Environmental Sciences University of Birmingham

Carbonaceous aerosols account for20-50%of total fine particulate matter(PM;,particles with a diameter of2.5μm or less)mass concentration in polluted urban atmospheres and can affect atmospheric chemistry,air quality,... 详细信息

关键词： SOA PM New insights into the sources and formation of carbonaceous aerosols in China:potential applications of dual-carbon isotopes

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燃烧源氨排放对灰霾期间北京大气铵的重要贡献

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Science Bulletin 2024年第7期69卷 978-987页

作者：吴礼彬王芃张强任红 Zongbo Shi 胡伟陈静谢巧蓉李林杰越思瑶韦莲芳宋琳琳张永根王子涵陈爽韦琬王小曼章炎麟孔少飞葛宝珠杨婷方运霆任露洁邓君俊孙业乐王自发张宏亮胡建林刘丛强 Roy M.Harrison Qi Ying 傅平青 Institute of Surface-Earth System Science School of Earth System ScienceTianjin UniversityTianjin 300072China Department of Atmospheric and Oceanic Sciences Fudan UniversityShanghai 200438China IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan UniversityShanghai 200438China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institute Chengdu University of Information TechnologyChengdu 610225China Division of Environmental Health&Risk Management School of GeographyEarth&Environmental SciencesUniversity of BirminghamBirmingham B152TTUK School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110164China Yale-NUIST Center on Atmospheric Environment International Joint Laboratory on Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjing 210044China Department of Atmospheric Sciences School of Environmental Studies and Department of Environmental Science and TechnologySchool of Environmental StudiesChina University of GeosciencesWuhan 430074China Department of Environmental Science and Engineering Fudan UniversityShanghai 200438China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlNanjing University of Information Science and TechnologyNanjing 210044China Department of Environmental Sciences/Center of Excellence in Environmental Studies King Abdulaziz UniversityJeddah 21589Saudi Arabia Zachr

Aerosol ammonium(NH_(4)^(+)),mainly produced from the reactions of ammonia(NH_(3))with acids in the atmosphere,has significant impacts on air pollution,radiative forcing,and human *** the source and formation mechanism of NH_(4)^(+)can provide scientific insights into air quality ***,the sources of NH_(3)in urban areas are not well understood,and few studies focus on NH_(3)/NH_(4)^(+)at different heights within the atmospheric boundary layer,which hinders a comprehensive understanding of aerosol NH_(4)^(+).In this study,we perform both field observation and modeling studies(the Community Multiscale Air Quality,CMAQ)to investigate regional NH_(3)emission sources and vertically resolved NH_(4)^(+)formation mechanisms during the winter in *** stable nitrogen isotope analyses and CMAQ model suggest that combustion-related NH_(3)emissions,including fossil fuel sources,NH_(3)slip,and biomass burning,are important sources of aerosol NH_(4)^(+)with more than 60%contribution occurring on heavily polluted *** contrast,volatilization-related NH_(3)sources(livestock breeding,N-fertilizer application,and human waste)are dominant on clean ***-related NH_(3)is mostly local from Beijing,and biomass burning is likely an important NH_(3)source(~15%–20%)that was previously *** effective control strategies such as the two-product(e.g.,reducing both SO_(2)and NH_(3))control policy should be considered to improve air quality.

关键词： Particulate ammonium Nitrogen isotope PM2.5 The Community Multiscale Air Quality(CMAQ) Control policy

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轻质脱硫石膏改性材料填充冷弯型钢组合墙体抗震性能试验研究

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建筑结构学报 2020年第1期41卷 42-50页

作者：吴函恒晁思思刘向斌周天华任璐杰长安大学建筑工程学院陕西西安710061 长安大学基建处陕西西安710064

为研究轻质脱硫石膏改性材料填充冷弯型钢组合墙体的抗震性能,对5片轻质脱硫石膏改性材料填充冷弯型钢组合墙体的足尺试件进行低周反复加载试验。研究该类墙体的破坏机理、承载力及抗侧刚度、滞回性能、延性及变形、耗能性能等。试验结... 详细信息

为研究轻质脱硫石膏改性材料填充冷弯型钢组合墙体的抗震性能,对5片轻质脱硫石膏改性材料填充冷弯型钢组合墙体的足尺试件进行低周反复加载试验。研究该类墙体的破坏机理、承载力及抗侧刚度、滞回性能、延性及变形、耗能性能等。试验结果表明:填充墙体内填石膏分块形成斜向受压带,发挥其抗侧力功能,最终以各块填充物与墙架立柱之间的黏结滑移破坏以及轻质石膏块角部的受压破坏为主要破坏特征;较空腔墙体,填充墙体的受剪承载力和抗侧刚度均有大幅度提高,受剪承载力提高了55%~88%,抗侧刚度提高了142%~217%;随着填充材料强度的提高,墙体的抗侧刚度和受剪承载力逐步提高,但其提高幅度低于材料强度的提高幅度。

关键词：冷弯型钢组合墙体脱硫石膏拟静力试验抗震性能

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岭南四园造园特色及其对兰州园林化建设的借鉴意义

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甘肃林业科技 2011年第3期36卷 70-72页

作者：陆杰仁兰州市城市建设设计院甘肃兰州730000

岭南私家园林是中国私家园林的独特流派,有其显著的风格特点。选取岭南私家园林的代表佛山梁园、东莞可园、番禺余荫山房、顺德清晖园,对其造园历史、园主思想、园景特点和造园特色进行梳理探讨,总结精髓,以启发更深研究和借鉴运用。

关键词：岭南四园造园特色借鉴兰州

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以高质量外循环加快形成新质生产力

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开放导报 2024年第5期 25-32页

作者：任保平迟璐婕南京大学数字经济与管理学院江苏苏州215163

加快形成新质生产力,要重点提升外循环的质量和水平。高质量外循环促进新质生产力形成,需要加快实现国内国际两个市场有效对接,增强国内国际两种资源高效联通,引进前沿技术和吸引高质量外资,拓展更大范围、更宽领域、更深层次的开放,稳... 详细信息

加快形成新质生产力,要重点提升外循环的质量和水平。高质量外循环促进新质生产力形成,需要加快实现国内国际两个市场有效对接,增强国内国际两种资源高效联通,引进前沿技术和吸引高质量外资,拓展更大范围、更宽领域、更深层次的开放,稳步扩大规则、规制、管理、标准等制度型开放,提升我国在全球资源配置的水平和能力。高质量外循环通过“走出去”在全球集聚资源、营造有利于我国发展的国际环境、畅通更高水平双循环、推动科技的再创新等,促进新质生产力的形成。要积极参与国际生产链并提升在国际价值链中的地位,提升贸易投资合作质量和水平,统筹推进高水平开放平台建设,拓展形成新质生产力的对外开放空间,以高质量外循环加快形成新质生产力。

关键词：新质生产力外循环作用机理实现路径

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高效低碰撞的太赫兹无线定向MAC协议

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小型微型计算机系统 2024年第5期45卷 1235-1240页

作者：任智赵英杰梁建阳路杰重庆邮电大学通信与信息工程学院重庆400065

针对网络中节点在争用访问时期发送消息碰撞、时隙分配机制低效和空闲时隙浪费等问题,提出了一种高效低碰撞的太赫兹无线定向MAC协议.文中提出了3种新机制,分别是基于缓存权重的分组机制、复用竞争机制以及时隙分配机制.首先,在微网控制... 详细信息

针对网络中节点在争用访问时期发送消息碰撞、时隙分配机制低效和空闲时隙浪费等问题,提出了一种高效低碰撞的太赫兹无线定向MAC协议.文中提出了3种新机制,分别是基于缓存权重的分组机制、复用竞争机制以及时隙分配机制.首先,在微网控制器(Piconet Coordinator,PNC)中生成缓存映射表记录节点的缓存情况;然后,根据缓存映射表为节点分组,节点在分组对应的时隙中进行时隙请求,PNC根据节点缓存为节点分配时隙;最后,未申请到时隙的节点利用剩余时隙进行复用竞争操作.仿真结果表明,所提出的方案有效地提高了网络的吞吐量,减少了消息碰撞率并降低了平均时延.

关键词：太赫兹网络定向通信缓存权重节点分组时隙分配

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热退火对中空纤维气体分离膜结构及性能的影响

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膜科学与技术 2024年第4期44卷 1-7,16页

作者：牟庆迪盛鲁杰刘元法任吉中大连工业大学纺织与材料工程学院大连116034 洁净能源国家实验室中国科学院大连化学物理研究所大连116023

在气体膜分离领域,中空纤维膜(Hollow Fiber Membranes,HFMs)因其较高的比表面积和装填率等被广泛应用.本文选用干-湿法纺丝工艺制备的BTDA-TDI/MDI(P84)共聚聚酰亚胺中空纤维膜为基膜,在P84 T_(g)(332.6℃)温度以下(250℃,300℃)对P84 ... 详细信息

在气体膜分离领域,中空纤维膜(Hollow Fiber Membranes,HFMs)因其较高的比表面积和装填率等被广泛应用.本文选用干-湿法纺丝工艺制备的BTDA-TDI/MDI(P84)共聚聚酰亚胺中空纤维膜为基膜,在P84 T_(g)(332.6℃)温度以下(250℃,300℃)对P84 HFMs进行热退火处理,研究其对中空纤维膜结构和气体分离性能的影响.与原始P84 HFMs相比,当热处理温度为250℃时,热退火后的P84 HFMs的气体分离性能变化不明显,但是拉伸强度和断裂伸长率明显下降.当热处理温度接近T_(g)时(300℃),热退火后P84 HFMs的拉伸强度和断裂伸长率保持不变,并且气体分离选择性明显提高,膜丝表面的缺陷减少.为了进一步了解在T_(g)以下的热退火过程对中空纤维膜结构及性能的影响,采用XRD、FTIR和HIM等表征方法进行探索.

关键词：气体分离聚酰亚胺中空纤维膜热退火

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Drying curve simulation and LF-NMR online monitor of water state in ursolic acid loaded chitosan nanoparticles during microwave freeze drying

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 263-268页

作者： Xing ren Xu Duan Weiwei Cao lujie Zhao Guangyue ren Panpan Liu College of Food and Bioengineering Henan University of Science and TechnologyLuoyang 471023HenanChina

The changes in various states of water in ursolic acid(UA)loaded chitosan nanoparticles were assessed using lowfield nuclear magnetic resonance(LF-NMR)during microwave freeze drying(MFD)process,and six thin-layer models were applied to simulate the drying *** nanoparticles were dried at different microwave power densities(1 W/g,2 W/g and 4 W/g).The results showed that three water fractions with different transverse relaxation times(T_(2))were detected in fresh UA *** T_(2)relaxation time of water decreased significantly with drying time at different microwave power *** the mutual migration and transformation of water in different states during the drying process of chitosan nanoparticles ***,mathematical model analysis showed that the Page model provided the best description during the process of UA nanoparticle dried by *** Page model can better simulate the drying kinetics of chitosan nanoparticles dried by MFD,and LF-NMR technology can monitor the changes in water status of UA *** results revealed that LF-NMR can monitor the changes of water in UA nanoparticles during the drying process.

关键词： microwave drying chitosan nanoparticles water distribution

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Effects of different pretreatments on the pore structure of Chinese yam during microwave freeze drying

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International Journal of Agricultural and Biological Engineering 2020年第4期13卷 232-237页

作者： Hui Wang Xu Duan lujie Zhao Liuliu Duan Guangyue ren School of Chemical Engineering and Pharmacy Henan University of Science and TechnologyLuoyangHenan 471023China College of Food and Bioengineering Henan University of Science and TechnologyLuoyangHenan 471023China Henan Cooperative Innovation Center for Grain Storage Safety Zhengzhou 450001China

In order to explore the effects of different pretreatments on the pore structure of Chinese yam during Microwave Freeze Drying(MFD),the samples were treated by typical drying pretreatments including osmosis,blanching and ultrasound,and compared with the untreated *** results showed that the pretreatment had significant impacts on the porosity of MFD Chinese *** pretreatment could obtain the highest open porosity,and the internal pore network structure of the material showed a uniform sponge *** shape of pores obtained by blanching pretreatment was the most *** pore network structure obtained by different pretreatments could result in various product texture and rehydration,which implied that pretreatment methods should be carefully selected according to actual *** these pretreatments could improve the open porosity of MFD Chinese yam,which result in a better rehydration *** them,ultrasonic treatment is worth further investigating.

关键词： microwave freeze drying pretreatment pore network structure Chinese yam porosity

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