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Dynamics of Land Use/Land Cover Considering Ecosystem Services for a Dense-Population Watershed Based on a Hybrid Dual-Subject Agent and Cellular Automaton Modeling Approach

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Engineering 2024年第6期37卷 182-195页

作者： Yutong Li Yanpeng Cai Qiang Fu Xiaodong Zhang hang wan Zhifeng Yang Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China School of Water Conservancy and Civil Engineering Northeast Agricultural UniversityHarbin 150030China School of Environmental Science and Engineering Shandong UniversityQingdao 266000China

Land use/land cover represents the interactive and comprehensive influences between human activities and natural conditions,leading to potential conflicts among natural and human-related issues as well as among *** study introduced economic standards for farmers.A hybrid approach(CA-ABM)of cellular automaton(CA)and an agent-based model(ABM)was developed to effectively deal with social and land-use synergic issues to examine human–environment interactions and projections of land-use conversions for a humid basin in south *** attributes and socioeconomic data were used to analyze land use/land cover and its drivers of *** major modules of the CA-ABM are initialization,migration,assets,land suitability,and land-use change *** estimates of the factors influencing the urban land-use conversion probability were captured using parameters based on a spatial logistic regression(SLR)***,multicriteria evaluation(MCE)and Markov models were introduced to obtain empirical estimates of the factors affecting the probability of ecological land *** agent-based CA-SLR-MCE-Markov(ABCSMM)land-use conversion model was proposed to explore the impacts of policies on land-use *** model can reproduce observed land-use patterns and provide links for forest transition and urban expansion to land-use decisions and ecosystem *** results demonstrated land-use simulations under multi-policy scenarios,revealing the usefulness of the model for normative research on land-use management.

关键词： Land use/land cover Human-environment interactions Agent-based model Cellular automaton

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Generic load regulation strategy for enhancing energy efficiency of chiller plants

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Building Simulation 2024年第8期17卷 1273-1287页

作者： hang wan Yuyang Gong Shengwei wang Yongjun Sun Tao Xu Gongsheng Huang Department of Architecture and Civil Engineering City University of Hong KongHong KongChina Department of Building Environment and Energy Engineering Hong Kong Polytechnic UniversityHong KongChina School of Civil Engineering Guangzhou UniversityGuangzhouChina Shenzhen Research Institute of City University of Hong Kong ShenzhenChina

In many chiller plants,high coefficient of performance(COP)is only achieved at a few favorable part load ratios(PLRs),while the COP is low at many other non-favorable *** address this issue,this study proposes a generic load regulation strategy that aims to maintain chiller plants operating at high COP,particularly under non-favorable *** is achieved by incorporating thermal energy storage(TES)units and timely optimizing the charging and discharging power of the integrated TES *** optimal charging and discharging power is determined by solving a dynamic optimization problem,taking into account the performance constraints of the TES units and the chiller *** provide an overview of the energy-saving potential of the proposed strategy,a comprehensive analysis was conducted,considering factors such as building load profiles,COP/PLR curves of chillers,and attributes of the TES *** analysis revealed that the proposed load regulation strategy has the potential to achieve energy savings ranging from 5.7%to 10.8%for chiller plants with poor COPs under unfavorable PLRs,particularly in buildings with significant load variations.

关键词： load regulation thermal energy storage chiller plants building energy efficiency

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复杂应力条件下粗粒料的剪胀性研究进展

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长江科学院院报 2024年第8期41卷 104-112页

作者：周跃峰左永振万航长江科学院水利部岩土力学与工程重点实验室武汉430010 三峡大学土木与建筑学院湖北宜昌443002

粗粒料的剪胀性是其强度和变形研究的重要问题之一,它取决于颗粒排列、粒间压力等细微观作用;在宏观层面,受相对密度与应力状态的影响。围绕复杂应力条件下粗粒料的剪胀问题,从粗粒料力学特性的试验研究、粗粒料的剪胀性强度准则以及临... 详细信息

粗粒料的剪胀性是其强度和变形研究的重要问题之一,它取决于颗粒排列、粒间压力等细微观作用;在宏观层面,受相对密度与应力状态的影响。围绕复杂应力条件下粗粒料的剪胀问题,从粗粒料力学特性的试验研究、粗粒料的剪胀性强度准则以及临界状态与剪胀性方面,对国内外的研究进展进行了系统论述。在此基础上,提出该领域呈现如下发展态势:①通过大型真三轴试验开展粗粒料剪胀率的试验研究与理论分析,能够促进粗粒料本构理论的发展进步;②结合应力路径试验中的应力变形规律研究,可实现从常规三轴条件下向复杂应力条件下的剪胀方程的进一步发展,从而体现强度与变形问题的统一;③采用状态参量去评价土体的松密状态与剪胀性,能够耦合应力状态与孔隙比,尽量避免“一种材料,多组参数”。研究结果表明状态参量和应力路径相结合的方法,使得粗粒料的力学特性研究更加具有科学性和系统性。

关键词：粗粒料剪胀性真三轴试验强度准则状态参量

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基于模型预测路径积分和输出调节的层级运动控制

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汽车工程 2024年第10期46卷 1790-1803页

作者：万航聂士达刘辉张发旺项昌乐韩立金北京理工大学机械与车辆学院北京100081

由于车载平台计算能力的限制,长控制/预测时域和短控制步长之间存在难以调和的矛盾。本文基于时标分离思想推导了车辆平移运动与平面姿态运动解耦的必要条件,使得车辆的平移运动控制器可以获得更长的控制/预测时域,以便于生成类人跟踪... 详细信息

由于车载平台计算能力的限制,长控制/预测时域和短控制步长之间存在难以调和的矛盾。本文基于时标分离思想推导了车辆平移运动与平面姿态运动解耦的必要条件,使得车辆的平移运动控制器可以获得更长的控制/预测时域,以便于生成类人跟踪轨迹。车辆的平面姿态调整则基于更为精确的动力学模型和更短的控制周期来调节。此外,利用基于并行采样及优化的模型预测路径积分策略来减轻非线性运动规划的计算负担。最后,提出了一种模型预测输出调节器来解决车辆横向动力学中的欠驱动控制问题,并抑制偏航角的稳态误差。理论分析和试验结果表明,所提出方法能够极大地提升计算效率、参数适应性和转向平顺性,在所有验证工况中将横向冲击度平均降低了50%。

关键词：自动驾驶路径积分欠驱动输出调节

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Two-phase smooth particle hydrodynamics modeling of air-water interface in aerated flows

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Science China(Technological Sciences) 2017年第3期60卷 479-490页

作者： YANG HuiXia LI Ran LIN PengZhi wan hang FENG JingJie College of Civil Engineering Guizhou University State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University

Abstracted/indexed in：Science Citation Index,Science Citation Index Expanded（SciSearch）,Journal Citation Reports/Science Edition,SCOPUS,INSPEC,Zentralblatt Math,Chemical Abstracts Service（CAS）,Google Scholar,CSA,Academic OneFile,Current Contents/Engineering,Computing and Technology,Earthquake Engineering Abstracts,EI-Compendex,Gale,OCLC,SCImago,Summon by ProQuest Supervised by Chinese Academy of Sciences

关键词： aerated flow dam break density difference hydraulic jump interface smoothed particle hydrodynamics

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Imperatorin alleviates Aβ-induced spatial learning memory impairment and neuroinflam⁃mation in model mice of Alzheimer disease

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中国药理学与毒理学杂志 2021年第9期35卷 642-643页

作者： wan hang-juan LUO Li LIU Xin HE Wei Department of Pharmacology Gannan Medical UniversityKey Laboratory of Cerebrovascular Pharmacology of Jiangxi ProvinceKey Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Edu-cationGanzhou 341000China

OBJECTIVE To investigate the effects of imperatorin on the spatial learning memory impairment and neuroinflammation in model mice of Alzheimer disease(AD)induced by intracerebroventricular injection of Aβ*** Mouse model of AD was established by injection of Aβ1-42 into the lateral ***⁃peratorin(2.5 and 5.0 mg·kg-1,daily)was inject⁃ed by intraperitoneally 1 h after intracerebroven⁃tricular injection for 13 *** effect of imperato⁃rin on the spatial learning and memory impair⁃ment was assessed by eight arm maze *** levels of cytokines TNF-α,IL-1β,IL-6,IL-18 and chemokines MCP-1 in mouse cortex and hip⁃pocampus were detected by *** protein expression of NF-κB P65,TLR4,MyD88,p-P38,p-ERK,and p-JNK were detected by Western *** As compared with the AD model group,imperatorin treatment significantly attenuated Aβ1-42-induced spatial learning and memory impairment assessed by eight arm maze *** addition,imperatorin significantly reduced the levels of cytokines TNF-α,IL-1β,IL-6,IL-18 and chemokines MCP-1 in the cerebral cortex and ***,Western blotting results showed that imperatorin treat⁃ment significantly down-regulated the protein expression of NF-κB P65,TLR4,MyD88,p-P38,p-ERK,and *** Imperatorin has neuroprotective effects in the Aβ1-42 induced AD model mice and its mechanism may be partially associated with the inhibition of inflam⁃matory response in the cortex and hippocampus.

关键词： imperatorin Alzheimer disease Aβ1-42 learning and memory impairment inflam⁃matory response

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安徽省2022年小兽携带汉坦病毒基因序列分析

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中国媒介生物学及控制杂志 2024年第3期35卷 261-267页

作者：陈晴晴侯银续陆皖行吴小珉吴磊徐庆华安徽省疾病预防控制中心微生物检验室/消毒杀虫科安徽合肥230601

目的了解安徽省小兽携带汉坦病毒情况及病毒基因型特征。方法2021年9月-2022年12月,安徽省按照《全国病媒生物病原学监测方案(试行)》采集小兽样本,运用反转录实时荧光定量PCR方法检测小兽肺标本汉坦病毒核酸,对阳性标本进行S片段全长... 详细信息

目的了解安徽省小兽携带汉坦病毒情况及病毒基因型特征。方法2021年9月-2022年12月,安徽省按照《全国病媒生物病原学监测方案(试行)》采集小兽样本,运用反转录实时荧光定量PCR方法检测小兽肺标本汉坦病毒核酸,对阳性标本进行S片段全长扩增、测序及基因序列分析。结果全省16个地市共检测4075份样本,包括8种小兽,其中褐家鼠、小家鼠、黄胸鼠和黑线姬鼠为优势种,分别占32.15%、21.87%、21.72%和20.86%。汉坦病毒核酸阳性率为1.47%(60/4075),包含汉滩病毒和首尔病毒。60份阳性标本通过交叉PCR法扩增获得19条S序列,遗传进化分析显示汉滩病毒属于H5亚型,首尔病毒为S3亚型,序列之间核苷酸相似性为72.00%~100%,氨基酸相似性为83.00%~100%。结论安徽省小兽中存在汉滩病毒和首尔病毒感染,应加强对小兽汉坦病毒的监测工作,为肾综合征出血热传染病防控提供科学依据。

关键词：肾综合征出血热汉坦病毒基因型 S片段

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Achieving Synergistic Improvement in Dielectric and Energy Storage Properties of All-Organic Poly(Methyl Methacrylate)-Based Copolymers Via Establishing Charge Traps

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Energy & Environmental Materials 2024年第2期7卷 308-319页

作者： Guanghu He Huang Luo Chuanfang Yan Yuting wan Dang Wu hang Luo Yuan Liu Sheng Chen Key Laboratory of Polymeric Materials and Application Technology of Hunan Province College of ChemistryXiangtan UniversityXiangtan 411105China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Guangdong University of Petrochemical Technology Maoming 525000China

How to achieve synergistic improvement of permittivity(ε_(r))and breakdown strength(E_(b))is a huge challenge for polymer ***,for the first time,theπ-conjugated comonomer(MHT)can simultaneously promote theε_(r)and E_(b)of linear poly(methyl methacrylate)(PMMA)*** PMMA-based random copolymer films(P(MMA-co-MHT)),block copolymer films(PMMA-b-PMHT),and PMMA-based blend films were prepared to investigate the effects of sequential structure,phase separation structure,and modification method on dielectric and energy storage properties of PMMA-based dielectric *** a result,the random copolymer P(MMA-coMHT)can achieve a maximumε_(r)of 5.8 at 1 kHz owing to the enhanced orientation polarization and electron *** electron injection and charge transfer are limited by the strong electrostatic attraction ofπ-conjugated benzophenanthrene group analyzed by the density functional theory(DFT),the discharge energy density value of P(MMA-co-PMHT)containing 1 mol%MHT units with the efficiency of 80%reaches15.00 J cm^(-3)at 872 MV m^(-1),which is 165%higher than that of pure *** study provides a simple and effective way to fabricate the high performance of polymer dielectrics via copolymerization with the monomer of P-type semi-conductive polymer.

关键词： dielectric capacitor electrical properties energy density polymer dielectric semiconductor polymer

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Wearable pressure sensors based on antibacterial and porous chitosan hydrogels for full-range human motion detection

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Science China(Technological Sciences) 2024年第8期67卷 2475-2484页

作者： Zhang YingXin LIU hanguang JIN ShunYu LI YaJuan Zhang wan ZHOU hang NIE ZanXiang HUANG Yuan School of Microelectronics Science and Technology Sun Yat-sen UniversityGuangzhou 510275China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230022China Department of Clinical Laboratory the First Affiliated Hospital of Anhui Medical UniversityHefei 230022China School of Electronic and Computer Engineering Peking University Shenzhen Graduate SchoolShenzhen 518055China Zinergy Shenzhen Ltd. Shenzhen 518109China

Wearable pressure sensors made from conductive hydrogels hold significant potential in health ***,limited pressure range(Pa to hundreds of kPa)and inadequate antibacterial properties restrict their practical applications in diagnostic and health ***,a wearable high-performance pressure sensor was assembled using a facilely prepared porous chitosan-based hydrogel,which was constructed from commercial phenolphthalein particles as a sacrificial *** relationship between the porosity of hydrogels and sensing performance of sensors was systematically ***,the wearable pressure sensor,featuring an optimized porosity of hydrogels,exhibits an ultrawide sensing capacity from 4.83 Pa to 250 k Pa(range-to-limit ratio of 51,760)and high sensitivity throughout high pressure ranges(0.7 kPa~(-1),120–250 kPa).The presence of chitosan endows these hydrogels with outstanding antibacterial performance against *** and ***,making them ideal candidates for use in wearable *** features allow for a practical approach to monitor full-range human motion using a single device with a simple structure.

关键词： porous hydrogels antibacterial performances wearable pressure sensors full-range human motion chitosan

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High-speed flexible near-infrared organic photodiode for optical communication

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National Science Review 2024年第3期11卷 227-238页

作者： Yu Zhu Hongbin Chen Ruiman Han Hao Qin Zhaoyang Yao hang Liu Yanfeng Ma Xiangjian wan Guanghui Li Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryTianjin Key Laboratory of Functional Polymer Materials College of Chemistry and Renewable Energy Conversion and Storage Center(RECAST) Nankai University State Key Laboratory of Elemento-Organic Chemistry Nankai University

Optical communication is a particularly compelling technology for tackling the speed and capacity bottlenecks in data communication in modern society. Currently, the silicon photodetector plays a dominant role in high-speed optical communication across the visible-near-infrared spectrum. However, its intrinsic rigid structure, high working bias and low responsivity essentially limit its application in next-generation flexible optoelectronic devices. Herein, we report a narrow-bandgap non-fullerene acceptor（NFA） with a remarkable π-extension in the direction of both central and end units（CH17） with respect to the Y6 series, which demonstrates a more effective and compact 3D molecular packing, leading to lower trap states and energetic disorders in the photoactive film. Consequently, the optimized solution-processed organic photodetector（OPD） with CH17 exhibits a remarkable response time of 91 ns（λ = 880 nm） due to the high charge mobility and low parasitic capacitance, exceeding the values of most commercial Si photodiodes and all NFA-based OPDs operating in self-powered mode. More significantly, the flexible OPD exhibits negligible performance attenuation（<1%） after bending for 500 cycles, and maintains 96% of its initial performance even after 550 h of indoor exposure. Furthermore, the high-speed OPD demonstrates a high data transmission rate of 80 MHz with a bit error rate of 3.5 × 10-4, meaning it has great potential in next-generation high-speed flexible optical communication systems.

关键词： flexible organic photodetector high-speed NIR organic photodetector optical communication light fidelity narrow-bandgap non-fullerene acceptors

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