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闸下附壁射流的实验研究与数值计算 被引量:1
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作者 汪德爟 潘顺琪 《水动力学研究与进展(A辑)》 CSCD 北大核心 1991年第A12期19-28,共10页
本文利用二维激光流速仪对闸下附壁射流进行了实验研究。根据实验结果对射流的流速场和紊动特性进行了分析。在对附壁射流紊动特性分析的基础上,利用修正的k-ε模式(k-ε-M模式)和特殊的边界条件的处理方法对闸下附壁射流进行了计算,计... 本文利用二维激光流速仪对闸下附壁射流进行了实验研究。根据实验结果对射流的流速场和紊动特性进行了分析。在对附壁射流紊动特性分析的基础上,利用修正的k-ε模式(k-ε-M模式)和特殊的边界条件的处理方法对闸下附壁射流进行了计算,计算结果与实验结果相当一致。 展开更多
关键词 附壁射流 激光测速仪 数值计算
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连续变化钢筋尺寸快速翻样方法 被引量:1
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作者 潘顺琪 李仲勤 《土木建筑工程信息技术》 2017年第4期98-101,共4页
讨论了目前连续变化钢筋尺寸翻样的几种方法,介绍了利用Autocad进行翻样的优势,并用lisp语言实现翻样的自动化,最后结合某桥墩实例详细的描述了利用lisp语言实现连续变化钢筋尺寸快速翻样的一般步骤。
关键词 连续变化钢筋 AUTOCAD LISP语言 参数化绘图 自动化翻样标注
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Effects of the Anthropogenic Activities on the Morphological Evolution of the Modaomen Estuary, Pearl River Delta, China 被引量:3
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作者 贾良文 潘顺琪 吴超羽 《China Ocean Engineering》 SCIE EI CSCD 2013年第6期795-808,共14页
Owing to the intensive human activities, the Modaomen Estuary has been significantly modified since 1950s, which has resulted in considerable changes of hydrodynamics and morphodynamics in the area. In this paper, the... Owing to the intensive human activities, the Modaomen Estuary has been significantly modified since 1950s, which has resulted in considerable changes of hydrodynamics and morphodynamics in the area. In this paper, the effects of the anthropogenic activities on the hydrodynamics and morphological evolution in the estuary at different stages are systematically assessed based on the detailed bathymetric data and field survey. The results show that the human activities have caused the channelization of the enclosed sea area in the Modamen Estuary;fast seaward movement of the mouth bar with high siltation;expansion of the channel volume due to channel deepening. The paper also highlights the main hydrodynamic changes in the estuary, including the rise of the water level;the distinguishing changes of tidal range before and after the 1990s (decrease and increase respectively); as well as the increase of the divided flow ratio. It is found that reclamation is the main factor promoting the transition of nature of the estuary from runoff dominant to runoff and wave dominant, and sand mining activities are mainly to strengthen the tidal dynamic and to low the water level. The results provide useful guidance for better planning of the future developments in the estuary and further research in the area. 展开更多
关键词 Modaomen Estuary anthropogenic activities morphological evolution RECLAMATION sand mining
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Optimization of a Dual-Baffled Rectangular Tank Against the Sloshing Phenomenon 被引量:1
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作者 Hassan Saghi Dezhi Ning +1 位作者 Shunqi Pan Reza Saghi 《Journal of Marine Science and Application》 CSCD 2022年第1期116-127,共12页
A dual-baffled rectangular tank with different configurations is proposed to reduce the sloshing effect,and design optimization is conducted through numerical simulations with open-source software,namely OpenFOAM,base... A dual-baffled rectangular tank with different configurations is proposed to reduce the sloshing effect,and design optimization is conducted through numerical simulations with open-source software,namely OpenFOAM,based on the computational fluid dynamic model.A series of physical experiments in the dual-baffled rectangular tank is performed for model validation and design optimization with the measured water surface elevation distributions along the tank.The optimization uses the calculated maximum horizontal force exerted on the tank and entropy generation(EG)as the criterion.Results show that the dual-baffle configuration positioned at the tank center is more effective in reducing the sloshing than that of the single baffle when the relative baffle height and initial water depth ratio(Hb/Hw,where Hb and Hw represent baffle height and static water depth,respectively)are larger than 0.5.However,such an effect then diminishes when the ratio is larger than 0.75.The effect of the dual-baffle configuration on the sway motion under the condition of different motion amplitudes and frequencies is also evaluated.The results show that the reduction in the maximum horizontal force is almost the same for dual-and single-baffled configurations and reaches the minimum when the sway motion amplitude is near 0.03 m.The dual-baffled configuration for the angular frequency of the sway motion is more effective than the single-baffled in reducing the sloshing at the low angular frequencies but is only less effective at high angular frequencies.Furthermore,the optimal baffle inclination angle is 85°when the inclined straight and curved baffles are used,and curved baffles can successfully decrease the horizontal force exerted on the tank and EG. 展开更多
关键词 Rectangular storage tank Dual-baffled rectangular tank Sloshing phenomenon OPTIMIZATION Horizontal force Entropy generation
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POI数据下的兰州市城区犯罪分布环境分析 被引量:5
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作者 刘永超 潘顺琪 《测绘与空间地理信息》 2019年第5期110-113,118,共5页
针对城市犯罪分布环境的研究问题,本文基于兰州市的犯罪统计数据,结合POI大数据,使用空间统计和GIS空间分析方法提取了兰州市3种类型犯罪的热点区,并进一步使用POI数据探索了犯罪热点区内的环境特征。结果表明:1)兰州市4个城区内犯罪分... 针对城市犯罪分布环境的研究问题,本文基于兰州市的犯罪统计数据,结合POI大数据,使用空间统计和GIS空间分析方法提取了兰州市3种类型犯罪的热点区,并进一步使用POI数据探索了犯罪热点区内的环境特征。结果表明:1)兰州市4个城区内犯罪分布情况不同,主要集中在人口较多的黄河南岸,其中又以西站、西湖公园、"西关十字—南关十字"一线、西固城步行街等区域为主,城关区作为中心城区,犯罪行为分布范围广,犯罪高发区多。2) 3类犯罪热点区的设施点环境多数是多类型POI设施共同主导,少数是单类型POI设施主导,但起主导作用的POI类型都能反映出对应的主要犯罪类型对城市环境的要求特点。3) 3类犯罪对人流、财富以及场所隐蔽性的趋向性不同,并在对应环境的POI分布特征中得到体现。 展开更多
关键词 POI 犯罪地理学 犯罪环境
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