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Measuring potential food productivity for different areas in Songnen Plain based on analytic hierarchy process

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Ecological Economy 2010年第2期6卷 161-167页

作者： YAO Zuo-fang liu Xing -tu YANG Fei YAN Min-hua MENG Jun liu qiu-mei Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130012P.R.China Graduate University Chinese Academy of SciencesBeijing 100039P.R.China Institute of Geographic Science and Natural Resources Research Chinese Academy of SciencesBeijing 100101P.R.China Northeast Agricultural University Harbin 150030P.R.China

The improved analytic hierachy process method was utilized in this paper,and a variety of factors influencing the food production were classified into several interrelated orderly objectives layers;based on the works above,this paper made an scientific assessment on the influencing factors of food production and production potential of the various regions in the Songnen *** weights and composite indices were calculated with the method of solving weight by AHP's accumulation factor sequence evaluating data,and were processed by single-level sorting and general *** result showed that,the region of Changchun had the biggest potential for improving food production,but smallest for Heihe *** key reason for the food production discrepancy of a variety of regions in Songnen Plain is the differences in scale of production and climatic conditions,the weight coefficients of which are 0.3654 and 0.2742;however,the weight coefficients of agricultural science and technology investment is very low just 0.1703,which should be increasted in the future.

关键词： Analytic hierarchy process Accumulation factor Food productivity potential

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步行设施内疏散行人拥挤踩踏仿真研究

交通运输系统工程与信息 2020年第3期20卷 190-197页

作者：岳昊刘秋梅武鑫森北京交通大学综合交通运输大数据应用技术交通运输行业重点实验室北京100044

建立基于元胞自动机与相互作用力的拥挤行人流仿真模型,研究步行设施内疏散行人流拥挤踩踏现象.通过单个行人占据多个元胞空间,定义行人刚体部分与弹性部分,实现行人弹性化处理;以行人间拥挤力、摩擦力等相互作用力,描述疏散行人间的相... 详细信息

建立基于元胞自动机与相互作用力的拥挤行人流仿真模型,研究步行设施内疏散行人流拥挤踩踏现象.通过单个行人占据多个元胞空间,定义行人刚体部分与弹性部分,实现行人弹性化处理;以行人间拥挤力、摩擦力等相互作用力,描述疏散行人间的相互影响.模拟再现行人疏散过程中的移动阻滞、相互挤压,以及连续踩踏等现象.仿真结果表明:通过提高行人吸收系数和抗踩踏系数,能有效控制行人挤伤次数和踩踏行人数量;疏散出口附近区域是拥挤力累积顶区,极易发生踩踏现象,且踩踏现象具有滞后性.

关键词：城市交通拥挤踩踏元胞自动机行人疏散拥挤力

基于模糊规划算法求多层线性规划的折中最优解

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模糊系统与数学 2018年第6期32卷 134-140页

作者：刘秋梅杨艳梅华北理工大学理学院河北唐山063000

本文利用模糊规划算法求解多层线性规划问题。在对问题的第l层进行求解时,确定前l层目标函数和前l-1层决策变量的隶属函数,通过隶属函数表明各层决策者对于目标函数和决策变量的满意水平。建立使得最差满意水平最大化的线性规划模型求... 详细信息

本文利用模糊规划算法求解多层线性规划问题。在对问题的第l层进行求解时,确定前l层目标函数和前l-1层决策变量的隶属函数,通过隶属函数表明各层决策者对于目标函数和决策变量的满意水平。建立使得最差满意水平最大化的线性规划模型求得折中最优解。通过数值算例验证算法的可行性。

关键词：多层线性规划模糊规划算法隶属函数折中最优解

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen liu Xuliang Lin Xueqing qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

Correlation between Combined Urinary Metal Exposure and Grip Strength under Three Statistical Models:A Cross-sectional Study in Rural Guangxi

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Biomedical and Environmental Sciences 2024年第1期37卷 3-18页

作者： LIANG Yu Jian RONG Jia Hui WANG Xue Xiu CAI Jian Sheng QIN Li Dong liu qiu mei TANG Xu MO Xiao Ting WEI Yan Fei LIN Yin Xia HUANG Shen Xiang LUO Ting Yu GOU Ruo Yu CAO Jie Jing HUANG Chu Wu LU Yu Fu QIN Jian ZHANG Zhi Yong Department of Environmental and Occupational Health School of Public HealthGuangxi Medical UniversityNanning 530021GuangxiChina Key Laboratory of Tumor Immunology and Microenvironmental Regulation Guilin Medical UniversityGuilin 541199GuangxiChina Department of Environmental Health and Occupational Medicine School of Public HealthGuilin Medical UniversityGuilin 541199GuangxiChina Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases Guangxi Medical UniversityNanning 530021GuangxiChina Guangxi Key Laboratory of Environment and Health Research Guangxi Medical UniversityNanning 530021GuangxiChina Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education Guangxi Medical UniversityNanning 530021GuangxiChina Guangxi Health Commission Key Laboratory of Entire Lifecycle Health and Care Guilin Medical UniversityGuilin 541199GuangxiChina

Objective This study aimed to investigate the potential relationship between urinary metals copper(Cu),arsenic(As),strontium(Sr),barium(Ba),iron(Fe),lead(Pb)and manganese(Mn)and grip *** We used linear regression models,quantile g-computation and Bayesian kernel machine regression(BKMR)to assess the relationship between metals and grip *** In the multimetal linear regression,Cu(β=−2.119),As(β=−1.318),Sr(β=−2.480),Ba(β=0.781),Fe(β=1.130)and Mn(β=−0.404)were significantly correlated with grip strength(P<0.05).The results of the quantile g-computation showed that the risk of occurrence of grip strength reduction was−1.007(95%confidence interval:−1.362,−0.652;P<0.001)when each quartile of the mixture of the seven metals was *** kernel function regression model analysis showed that mixtures of the seven metals had a negative overall effect on grip strength,with Cu,As and Sr being negatively associated with grip strength *** the total population,potential interactions were observed between As and Mn and between Cu and Mn(P_(interactions) of 0.003 and 0.018,respectively).Conclusion In summary,this study suggests that combined exposure to metal mixtures is negatively associated with grip ***,Sr and As were negatively correlated with grip strength levels,and there were potential interactions between As and Mn and between Cu and Mn.

关键词： Urinary metals Handgrip strength Quantile g-computation Bayesian kernel machine regression

基于XML和J2EE的远程教育资源共享模型研究及实现

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计算机工程与设计 2005年第11期26卷 3147-3148,3151页

作者：郑耿忠刘秋梅韩山师范学院数学与信息技术学院广东潮州521041 韩山师范学院图书馆广东潮州521041

随着远程教育的不断发展,如何进行教育资源建设,实现教育资源的共享,已成为远程教育中迫切需要解决的重要课题。对远程教育和计算机中新兴的XML和J2EE技术进行了研究,从面向对象的角度出发构建了一个基于XML和J2EE的远程教育资源共享模... 详细信息

随着远程教育的不断发展,如何进行教育资源建设,实现教育资源的共享,已成为远程教育中迫切需要解决的重要课题。对远程教育和计算机中新兴的XML和J2EE技术进行了研究,从面向对象的角度出发构建了一个基于XML和J2EE的远程教育资源共享模型,并对该模型的设计及实现过程进行了分析。

关键词：远程教育 XML J2EE 资源共享模型

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蚁群算法在分布式智能答疑系统中的应用研究

微电子学与计算机 2010年第6期27卷 50-53页

作者：郑耿忠刘秋梅韩山师范学院数学与信息技术系广东潮州521041 韩山师范学院图书馆广东潮州521041

针对分布式智能答疑系统的特点,在对基于蚁群优化的分类规则发现算法研究的基础上,提出了分布式蚁群智能分类算法,并对该算法在分布式智能答疑系统中的应用进行了分析和测试.实践证明,该算法能有效地对分布式智能答疑系统的范例库进行... 详细信息

针对分布式智能答疑系统的特点,在对基于蚁群优化的分类规则发现算法研究的基础上,提出了分布式蚁群智能分类算法,并对该算法在分布式智能答疑系统中的应用进行了分析和测试.实践证明,该算法能有效地对分布式智能答疑系统的范例库进行数据挖掘,进一步提高智能答疑系统检索的效率和智能性,使分布式智能答疑系统的应用进入一个新台阶.

关键词：分布式智能答疑系统蚁群算法数据挖掘范例库

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基于模糊控制的移动无线传感器网络部署优化

微电子学与计算机 2011年第2期28卷 28-32页

作者：郑耿忠刘秋梅韩山师范学院数学与信息技术系广东潮州521041 韩山师范学院图书馆广东潮州521041

将模糊控制机制引入移动传感器网络的节点部署中,提出并分析了功率有效的模糊优化算法PFOA,仿真结果表明PFOA能有效实现移动节点部署的优化,并极大延长网络的生命周期,实现WSNs覆盖的最大化和高质量的可靠通信.

关键词：无线传感器网络移动节点模糊控制覆盖

步行通道内行人流拉链现象的生成机理与仿真研究

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物理学报 2021年第6期70卷 324-337页

作者：武鑫森岳昊刘秋梅张旭邵春福北京交通大学综合交通运输大数据应用技术交通运输行业重点实验室北京100044 河南工业大学土木建筑学院郑州450001

以步行通道内的单向行人流为研究对象,分析研究行人拉链现象的生成机理,并建立基于Voronoi图的速度修正模型对其仿真研究.首先,从行人追求视野最佳和步行舒适的角度分析拉链现象的生成机理,以行人的视野关注和视野遮挡描述影响行人移动... 详细信息

以步行通道内的单向行人流为研究对象,分析研究行人拉链现象的生成机理,并建立基于Voronoi图的速度修正模型对其仿真研究.首先,从行人追求视野最佳和步行舒适的角度分析拉链现象的生成机理,以行人的视野关注和视野遮挡描述影响行人移动过程中产生拉链偏移的因素;以行人局部密度描述行人的步行舒适度;引入拉链敏感系数描述行人客观偏移的意愿程度;提出单个行人侧向偏移的机制,获得行人最佳的偏移位置.然后,构建基于Voronoi图的行人速度修正仿真模型,考虑行人是否有偏移倾向的主观意愿,并嵌入偏移规则,模拟再现行人的拉链现象.仿真发现:行人的拉链层数与通道宽度成正比,该模型速度密度关系图与实证数据吻合较好;与不考虑拉链效应相比,倾向主动进行侧向偏移的行人占比越大,越有助于提高通道内行人的移动速度、舒适度和空间利用率.

关键词：行人动力学行人仿真拉链效应 Voronoi图