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Assessment of Agricultural Drought Vulnerability Based on Crop Growth Stages:A Case Study of Huaibei Plain,China

International Journal of Disaster Risk Science 2023年第2期14卷 209-222页

作者： Yanqi Wei Juliang Jin Haichao Li yuliang zhou Yi Cui Nii Amarquaye Commey yuliang Zhang Shangming Jiang School of Energy and Power Engineering Xihua UniversityChengdu610039China School of Civil Engineering Hefei University of TechnologyHefei230009China Institute of Water Resources and Environmental Systems Engineering Hefei University of TechnologyHefei230009China State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing100084China Interdisciplinary Centre for River Basin Environment University of YamanashiKofu400-8510Japan Key Laboratory of Water Conservancy and Water Resources of Anhui Province Water Resources Research Institute of Anhui Province and Huaihe River CommissionMinistry of Water ResourcesHefei230088China

Climate change can lead to and intensify drought *** the vulnerability of disaster-affected elements is significant for understanding the mechanisms that transform drought intensity into eventual *** study proposed a growth-stage-based drought vulnerability index(GDVI)of soybean using meteorological,groundwater,land use,and field experiment data and crop growth model *** CROPGRO-Soybean model was used to simulate crop growth and water *** growth stages were considered since the sensitivity of soybean to drought is strictly related to the growth *** GDVI was applied to the Huaibei Plain,Anhui Province,China,with the goal of quantifying the spatiotemporal characteristics of soybean drought vulnerability in typical years and growth *** results show that:(1)The sensitivity of leaf-related parameters exceeded that of other parameters during the vegetative growth stage,whereas the top weight and grain yield showed a higher sensitivity in the reproductive growth stage;(2)A semi-logarithmic law can describe the relationship between the drought sensitivity indicators and the GDVI during the four growth *** pod-filling phase is the most vulnerable stage for water deficit and with the highest loss upper limit(over 70%);(3)The 2001 and 2002 seasons were the driest time during *** and Huainan Cities were more vulnerable to drought than other regions on the Huaibei Plain in 2001,while Huaibei and Suzhou Cities were the most susceptible areas in *** results could provide effective decision support for the categorization of areas vulnerable to droughts.

关键词： Agricultural drought Drought vulnerability Huaibei plain Soybean growth stages

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An Improved Markov Chain Model Based on Autocorrelation and Entropy Techniques and Its Application to State Prediction of Water Resources

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Chinese Geographical Science 2011年第2期21卷 176-184页

作者： zhou Ping zhou yuliang JIN Juliang LIU Li WANG Zongzhi CHENG Liang ZHANG Libing College of Hydrology and Water Resources Hohai University Nanjing 210098 China College of Civil Engineering Hefei University of Technology Hefei 230009 China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210029 China

According to the relationships among state transition probability matrixes with different step lengths, an improved Markov chain model based on autocorrelation and entropy techniques was introduced. In the improved Markov chain model, the state transition probability matrixes can be adjusted. The steps of the historical state of the event, which was significantly related to the future state of the event, were determined by the autocorrelation technique, and the impact weights of the event historical state on the event future state were determined by the entropy technique. The presented model was applied to predicting annual precipitation and annual runoff states, showing that the improved model is of higher precision than those existing Markov chain models, and the determination of the state transition probability matrixes and the weights is more reasonable. The physical concepts of the improved model are distinct, and its computation process is simple and direct, thus, the presented model is sufficiently general to be applicable to the prediction problems in hydrology and water resources.

关键词： improved Markov chain model autocorrelation entropy annual precipitation annual runoff genetic algorithm

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Inference of Reference Conditions for Nutrient Concentrations of Chaohu Lake Based on Model Extrapolation

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Chinese Geographical Science 2013年第1期23卷 35-48页

作者： zhou yuliang JIN Juliang LIU Li ZHANG Libing He Jun WANG Zhesun College of Civil Engineering Hefei University of Technology Institute of Water Resources and Environmental Systems Engineering Hefei University of Technology

In the mid-eastern China,there are few or no lakes which are in the absence of anthropogenic disturbances,or their sediments remain *** a result,the reference lakes distribution and paleolimnological reconstruction approaches usually are inappropriate to estimate lake reference conditions for *** yields the necessity of using the extrapolation methods to estimate the lake reference conditions for nutrients within those *** lake reference conditions for nutrients could be inferred inversely from the law of mass conservation,current lake nutrient concentration,and the loadings from *** the scarcity of hydrological and water quality data associated with lakes and watersheds in China,as well as the low requirement of the watershed nutrient loadings models for these data,the soil conservation service(SCS) distributed hydrological model and the universal soil loss equation(USLE) were *** SCS model simulates the runoff process of the watershed,thereby calculating dissolved nutrients *** USLE estimates the soil erosion and particulate nutrients annually in a ***,with the loadings from atmospheric deposition and point source,the previous annual average nutrient concentrations could be acquired given the current nutrient concentrations in a ***,the nutrient reference conditions minimally impacted by human activities could be *** on the proposed model,the reference conditions for total nitrogen and total phosphorus of Chaohu Lake,Anhui Province,China are 0.031 mg/L and 0.640 mg/L,*** proposed reference conditions estimation model is of clear physical concept,and less data ***,the proposed approach can be used in other lakes with similar circumstances.

关键词： reference conditions soil conservation service universal soil loss equation total phosphorus total nitrogen Chaohu Lake

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Inhibition of botulinum toxin's association with rat brain synaptosomes by toosendanin,an antibotulismic triterpenoid

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Neural Regeneration Research 2006年第6期1卷 489-492页

作者： Jianying zhou yuliang Shi Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China

BACKGROUND： Toosendanin （TSN）, a tnterpenoid derivative extracted from the bark of Melia toosendanin Sieb et Zucc, has been demonstrated to be an effective drug for treatment of experimental botulism. OBJECTIVE ： To explore its antibotulismic mechanism by observing the effect of toosendanin on association of botulinum toxin （BoTx） with rat brain synaptosomes under different conditions. DESIGN： A randomized controlled experiment SETTING： Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences MATERIALS： Sprague-Dawiey rats, weighing （220±12） g, were involved. TSN was a sample recrystallized in ethanol with a punty 〉 98%. BoTx/A and BoTx/C of 500 ku （1.8×10^7 mouse LD50/mg） were purchased from Wako （Japan）, Horse antitoxins to BoTx/A and/C （primary antibodies） were purchased from Lanzhou Institute of Biological Products （China）. METHODS ： Major experiments were finished between March 2005 and October 2005 in key laboratory of neurobiology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences. （1） Preparation of synaptosome of rats： one aliquot of synaptosome was pre-incubated with TSN （17 μmol/L） for 20 minutes at 4 % or 37 % （another aliquot of synaptosome which was untouched was used as control）. Then, BoTx was respectively added for another 20-minute incubation. （2） A homochronous expenment was still performed at 37 %. Differently, high level of K^＋ was used to stimulate synaptosome for 25 minutes. Two aliquots of synaptosomes with or without TSN （17 μmol/L）were preincubated for 15 minutes, Then, 30 mmol/L KCl was separately added in two aliquots, 5 minutes later, 13 nmol/L BoTx/C was separately added followed by 20-minute incubation. （3）The effect of TSN on BoTx binding was observed by Western blot and synchronization method. （4） t test was used for comparing the difference of measurement data. MAIN OUTCOME MEASURES ： The gray value of BoTx bands from western blot was used to estimate the bound amount of BoTx. RES

关键词：川楝/治疗应用川楝/药理学大鼠 Sprague-Dawley 脑/病理学肉毒中毒/中药疗法随机分配突触体/药物作用大鼠动物小鼠

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Flood routing model incorporating intensive streambed infiltration

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Science China Earth Sciences 2015年第2期58卷 718-726页

作者： CHENG Liang WANG ZongZhi HU SiYi WANG YinTang JIN JuLiang zhou yuliang State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute School of Civil Engineering Hefei University of Technology

Flood routing models are critical to flood forecasting and confluence calculations. In the streams that dry up and disconnect from groundwater, the streambed infiltration is intensive and has a significant effect on flood wave movement. Streambed infiltration should be considered in flood routing. A flood routing model incorporating intensive streambed infiltration is proposed. In the model a streambed infiltration simulation method based on soil infiltration theory is developed. In this method the Horton equation is used to calculate infiltration capacity. A trial-and-error method is developed to calculate infiltration rate and determine whether the flood wave can travel downstream. A formula is derived to calculate infiltration flow per unit length. The Muskingum-Cunge method with streambed infiltration flow as lateral outflow is used for flood routing. The proposed model is applied to the stream from the downstream of the Yuecheng Reservoir to the Caixiaozhuang Hydrometric Station in the Zhangwei River of the Haihe River Basin. Simulation results show that the accuracy of the model is high, and the infiltration simulation method can represent infiltration processes well. The proposed model is simple and practical for flood simulation and forecasting, and can be used in river confluence calculations in a rainfall-runoff model for arid and semiarid regions.

关键词： flood simulation flood forecasting flood routing streambed inf'dtration Muskingum-Cunge method Haihe River Basin

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基于虚拟元-有限元耦合的隧道内道床干缩裂缝细观研究

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土木工程学报 2022年第4期55卷 109-119页

作者：金浩周瑜亮东南大学江苏南京211189 同济大学道路与交通工程教育部重点实验室上海201804

为解释道床与盾构隧道管片产生脱空的现象,研究新混凝土在浇筑后由干燥收缩产生的裂缝机理。基于虚拟元推导任意多边形骨料的刚度矩阵格式,利用UEL子程序实现有限元与虚拟元的耦合计算,纯弯梁数值试验结果表明耦合法较有限元法计算效率... 详细信息

为解释道床与盾构隧道管片产生脱空的现象,研究新混凝土在浇筑后由干燥收缩产生的裂缝机理。基于虚拟元推导任意多边形骨料的刚度矩阵格式,利用UEL子程序实现有限元与虚拟元的耦合计算,纯弯梁数值试验结果表明耦合法较有限元法计算效率明显提升,且具有较好的稳定性。在此基础上,建立细观尺度下新老混凝土的干缩数值模型,并通过圆盘干缩模型验证了模型参数。研究骨料和砂浆的应力分布、内部湿度与裂缝发展的对应关系以及新老混凝土表面和界面的应力发展。结果表明:(1)收缩过程中,骨料主要承受压应力作用,砂浆沿骨料边界的切线方向受骨料约束作用易形成收缩裂缝,在新混凝土表面首先出现大量微小裂缝,随后界面两端发生剥离。(2)受表面下骨料的约束作用,新混凝土表面拉应力呈现“驼峰”分布。开裂后表面被划分为多个收缩区,收缩区边界受拉应力,内部受压应力;(3)界面的拉伸和剪切应力由两侧开始增加,并且随着界面剥离的增加不断内移。在界面内部未剥离区域内存在由界面附近骨料约束导致的局部压应力和剪切应力增大。

关键词：地铁盾构隧道道床干缩裂缝细观尺度虚拟元

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基于骨料几何本征混凝土干缩开裂的三维细观研究

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中国科学：技术科学 2022年第8期52卷 1233-1244页

作者：金浩周瑜亮东南大学交通学院南京211189 道路交通工程国家级实验教学示范中心(东南大学) 南京211189 同济大学道路与交通工程教育部重点实验室上海201804 上海市轨道交通结构耐久与系统安全重点实验室上海201804

结合激光扫描测试和三角网格折叠算法形成了基于骨料几何本征的三维骨料模型库,提出了基于拟合体的真实骨料间接投放算法,建立了干燥环境下混凝土收缩开裂研究的细观尺度数值分析模型.通过湿扩散模拟确定混凝土湿度场的空间分布,根据湿... 详细信息

结合激光扫描测试和三角网格折叠算法形成了基于骨料几何本征的三维骨料模型库,提出了基于拟合体的真实骨料间接投放算法,建立了干燥环境下混凝土收缩开裂研究的细观尺度数值分析模型.通过湿扩散模拟确定混凝土湿度场的空间分布,根据湿度场的变化计算混凝土试块的损伤分布,模拟结果与已有试验结果吻合良好,验证了模型的可行性.在此基础上,研究了在干燥环境下混凝土干缩裂缝的扩展机理,揭示了混凝土表面干缩裂缝发展规律与细观介质之间的内在联系.结果表明,混凝土试块棱边较表面水分损失更快,更易产生初始裂缝;混凝土初始裂缝和表面损伤点与在表面下的骨料位置重合,且受骨料离表面的距离和粒径影响;随着环境相对湿度的降低,表面裂缝发展深度不断增加,试块表面出现更多贯通裂缝和损伤点,呈现以表面下骨料位置为节点的“龟裂”形态.

关键词：地铁混凝土干缩裂缝真实骨料细观尺度

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Impact of Technological Innovation on SMEs' Bank Loans: Moderating Effect of Bank-enterprise Relationship

Impact of Technological Innovation on SMEs' Bank Loans: Mode...

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3rd International Conference on Culture, Education and Economic Development of Modern Society (ICCESE 2019)

作者： yuliang zhou Jinfeng Li School of Finance Guangdong University of Finance & Economics School of Liberal Arts Zhaoqing University

This paper explores the impact of technological innovation on SMEs' loan structure under the moderating effect of the bank-enterprise relationship length as a condition variable. OLS model was established and 487 technological enterprises in Guangdong province were selected. Results show: first, R&D investment, the number of applied patents and authorized patents all affect loan structure negatively;second, when the relationship length becomes longer, technological innovation has positive effect on loan structure. Particularly, the number of authorized patents can effectively raise loan rates, reduce costs and increase long-term loans. On the contrary, the shorter the relationship length is, the faster the loan structure deteriorates;third, under the intervention of relationship length, the pecking order of promoting effect of three technological innovation variables on loans is as follows: authorized patents, applied patents and R&D investment.

关键词： technological innovation bank-enterprise relationship loan structure

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A High Precision Comprehensive Evaluation Method for Flood Disaster Loss Based on Improved Genetic Programming

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Journal of Ocean University of China 2006年第4期5卷 322-326页

作者： zhou yuliang LU Guihua JIN Juliang TONG Fang zhou Ping College of Water Resources and Environment Hohai University Nanjing 210098 P.R. China College of Civil Engineering Hefei University of Technology Hefei 230009 P.R. China

Precise comprehensive evaluation of flood disaster loss is significant for the prevention and mitigation of flood disasters. Here, one of the difficulties involved is how to establish a model capable of describing the complex relation between the input and output data of the system of flood disaster loss. Genetic programming (GP) solves problems by using ideas from genetic algorithm and generates computer programs automatically. In this study a new method named the evaluation of the grade of flood disaster loss (EGFD) on the basis of improved genetic programming (IGP) is presented (IGP-EGFD). The flood disaster area and the direct economic loss are taken as the evaluation indexes of flood disaster loss. Obviously that the larger the evaluation index value, the larger the corresponding value of the grade of flood disaster loss is. Consequently the IGP code is designed to make the value of the grade of flood disaster be an increasing function of the index value. The result of the application of the IGP-EGFD model to Henan Province shows that a good function expression can be obtained within a bigger searched function space; and the model is of high precision and considerable practical significance. Thus, IGP-EGFD can be widely used in automatic modeling and other evaluation systems.

关键词： automatic modeling evaluation of flood disaster loss genetic algorithm genetic programming

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The study on optimization model of emergency resource migration cost in Multi-cycle

The study on optimization model of emergency resource migrat...

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第30届中国控制与决策会议

作者： yuliang zhou Shenghan zhou Silin Qian Wenbing Chang School of Reliability and System Engineering Beihang University

The study builds an optimization model to analyze the emergency resource migration cost constraint problem in multi-cycle. The environment periodic variation is common phenomenon in the actual supply network. However, the traditional model set the supply network as constant. And the facility setup and migration cost constraints have not been considered in model. It is required to add the migration cost constraint into the model with the time variation. This paper improves the traditional RANPCP（r-all-neighbor p-center problem） model by taking the dynamic supply environment change into account. The proposed model defines the new objective function and constraint condition of key facility migration cost. The study uses the Simulated Annealing algorithm to solve the improved model. The numerical example is given to verify the feasibility of the proposed method. The result suggests that has more realistic significance and the research value.

关键词： Dynamic cycle Resource planning Migration cost RANPCP

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