The Application of Space Syntaxmodelling in Data-based Urban Design: an Example of Chaoyang Square Renewal in Jilin City [PDF]
, 2018 In the past decades, Space Syntax offers a series of theories and techniques to study the relationship between urban space and social-economic activities, and has been proved effective in analysis and design practices thanks to the open sources in the ...
Chen, Z +4 more
core
Shuitu Baochi Xuebao, 2019 植被覆盖结构是影响坡面侵蚀过程的重要因素，通过在黄丘区罗玉沟流域开展自然植被覆盖坡面野外模拟降雨试验，分析了90 mm/h雨强条件下地下根系、地下根系+地表结皮层和地下根系+地表结皮层+植被冠层3种不同覆盖结构对坡面产流产沙过程影响。结果表明：植被根系层次对增强土壤入渗起主导作用，使土壤入渗量增加67%，稳定入渗率增加39.7%；3种植被覆盖结构中，地表结皮层对产流和产沙具有最好的调控作用，减流贡献率和减沙贡献率分别为43%和67%；根系小区和裸地小区累积产流量与累积产沙量之间呈幂函数关系 ...
秦东远 +3 more
doaj
THE ANALYSIS OF FLOOR RESPONSE SPECTRUM IN EQUIPMENT-STRUCTURE INTERACTION FORM IN FREQUENCY DOMAIN [PDF]
, 2006 直接从由建筑物和设备组成的主次结构耦合系统各自的动力特性出发,考虑主次结构间调谐、干扰、非经典阻尼等因素的影响,推导出频率传递函数和次结构的加速度均方根响应,并由此进一步得到楼层的加速度均方根反应谱。这一方法避免了求解联合系统的复特征值和动力方程出现病态等问题,大大简化了计算过程。最后在算例中就次结构的阻尼比、质量比、安装楼层及场地土等因素对楼层加速度均方根反应谱的影响进行了讨论,算例表明,质量比是决定能否采用古典谱的关键因素,场地土对反应谱的影响也不容忽视。Based on the dynamic ...
张建霖, 张灿辉, 杨安钦
core
Research on sediment reduction benefits of engineering measures on waste rock slope under different rainfall intensities [PDF]
The dump slope of open-pit coal mines is characterized by steep gradients, loose structure, and poor stability, leading to severe soil erosion under heavy rainfall.
Gang LYU +3 more
core +1 more source
, 2009 采用在结构顶层设置双向TMD被动控制的方法,对结构在多向地震作用下的振动进行了被动控制的研究.在建立三维结构控制体系的动力学模型后推导出结构-TMD联合动力方程,并以功率谱密度函数矩阵迹的积分为目标函数,利用单纯形法对双向TMD的参数进行优化设计.数值结果表明,利用双向TMD系统对结构进行被动控制的方法是可行且有效的 ...
张建霖, 曾轲
core
Testing GLEAMS for Nitrate Leaching Modeling in an Agricultural Catchment of Southeast China [PDF]
, 2007 利用我国东南亚热带地区农业小流域不同土地利用方式的硝氮渗漏淋失实测数据检验了GLEAMS(Groundwater Loading Effects of Agricultural Management Systems)模型在该地区的适用性。通过现场试验和实地调查并结合模型手册,获取模型所需的水文和营养盐参数,参考模型参数的敏感性分析结果对模型进行调试。结果表明模型对水稻田除外的其它土地利用方式的硝氮渗漏淋失模拟效果较好。水稻田渗漏模拟效果差的主要原因在于模型的水分平衡方程不能反应水稻田长期淹水的实际情况 ...
徐玉裕 +3 more
core
Study on Urban Landscape Ecological Risk Measurement and the Influencing Factors in the Yellow River Delta [PDF]
[Objective] The Yellow River Delta, a typical ecological fragile area, faces prominent landscape ecological risk (LER) due to multiple factors. Systematic understanding of landscape risk is crucial for optimizing landscape patterns and effectively ...
LI Huilin +4 more
core +1 more source
Shuitu Baochi Xuebao目的为探究作物覆盖坡面地表微地形特征提取的可能性，实现作物覆盖条件下微地形三维建模与动态监测。方法采用SfM-MVS（structure from motion with multi-view stereo）方法，以玉米覆盖坡面为研究对象，裸坡作为对照，开展以裸坡及模拟微地形的标志物为基准，玉米覆盖条件下地表微地形构建提取和精度评估研究。结果1）玉米覆盖坡面控制点误差<0.002 m，稀疏点云与密集点云数量分别为裸坡的2.1、2.6倍。2）基于C2C（Cloud to Cloud）的结果表明 ...
姜静海, 郑子成, 何淑勤
doaj
Analysis of seismic site effects in the Tianjin port sea reclamation region [PDF]
To better analyze the seismic site effects in land reclamation areas and provide a scientific basis for earthquake-resistant engineering design, this study investigates the Dongjiang port land reclamation area in Tianjin.
Fuyang Cao +3 more
core +1 more source
Assessing Nitrate Leaching With GLEAMS Model in an Agricultural Small Catchment in Southeast China. [PDF]
, 2007 应用GLEAMS模型估算我国东南亚热带地区农业小流域硝态氮的渗漏淋失。在五川流域8种不同土地利用方式的农田中埋设渗漏监测装置,每月采集水样分析硝态氮含量。用2002年4—12月作物生长季节的实测数据进行模型校验的结果表明,模型对水稻田除外的其他土地利用方式下硝态氮渗漏淋失模拟效果较好。五川流域2002年硝态氮淋失模拟计算结果表明,不同土地利用方式下硝态氮淋失时空差异显著,全年渗漏量(以氮计)为4.6438.39 kg.hm-2,流域面积加权平均为29.99 kg.hm-2。甘蔗地 ...
曹文志, 王吉苹
core