Results 11 to 20 of about 432,091 (143)
, 1988 本文从描述非饱和土壤中水分流动的基本方程出发,对4种不同典型土壤在各种假定的均匀降雨速率下的入渗速率进行了数值模拟。结果表明,在降雨初期,由于降雨率低于入渗率,故全部雨量入渗,但当雨率大于入渗速率之后,入渗流动可以比拟为饱和水柱向非饱和区推进的柱塞流,其速率与饱和水柱长度成反比,而与分隔非饱和区与饱和水柱的湿润阵面上吸力大小成正比。如果对实际计算的吸力与Mein及Larson所推荐的理论计算吸力分别按各自最大吸力进行无量纲化,发现二者值吻合得很好。根据柱塞流这样一个概念 ...
孙菽芬
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Rhetorical Diffusion and Policy Latency: Tracing AIPAC Influence in US–Iran Relations (2010–2026)
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT How do domestic interest groups shape the transition from diplomatic agreements to kinetic warfare? This research article addresses the methodological stagnation in foreign policy analysis by introducing a computational text‐as‐data pipeline to systematically quantify lobbying influence.
Bülent Aras
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Shuitu Baochi Xuebao, 2007 通过肥液间歇和连续入渗实验,分析了肥液间歇入渗土壤湿润特性。结果表明,肥液间歇入渗湿润锋运移速度较连续入渗慢,并随周期数的增加而减小;分析了肥液间歇入渗湿润锋运移的分段模型,提出了由连续入渗湿润锋运移参数计算间歇入渗湿润锋运移距离的简化模型,实例计算表明该方法简单有效;对比了肥液间歇入渗和连续入渗土壤含水量的分布,肥液间歇入渗土壤含水量分布较连续入渗均匀,相同深度土层中入渗水量占总入渗量的比例较大。
吴军虎, 乔莲莲, 费良军
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, 2006 本发明公开了一种研究地下水入渗与反渗的实验测量装置。该装置包括：一两端开口的有机玻璃盒体、匀化介质，所述有机玻璃盒体填入有压实的待测土体，其一个侧面上布置若干压力传感器，并深入到土体中，所述的匀化介质安装在有机玻璃盒体开口的两端，该有机玻璃盒体的开口两端可垂直放置，水可从上端渗入或从下端渗入，或开口两端水平放置，水可从两侧水平渗入。本发明由于采用了一两端开口的有机玻璃盒体及一匀化介质，实现了在一个面上研究入渗和反渗的性质 ...
刘曰武
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Mechanical dynamic sealing components are usually subjected to the erosion of a hydrothermal environment; thus, the selected service materials must meet stringent requirements for superior self‐lubrication, corrosion resistance, and thermal stability.
Yanchun Zhao +8 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Metal‐doped carbon‐based nanomaterials (M‐CNM) play a strategically significant role in next‐generation precision antibacterial and antitumor therapies, as they integrate synergistic photothermal ablation, catalytic reactive oxygen species (ROS) generation, and multimodal imaging capabilities. However, their clinical translation is hindered by
Pengxiang Liu +5 more
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Shuitu Baochi Xuebao, 2023 坡度和作物生育期是影响坡耕地土壤入渗性能的关键因素,作物生长导致土壤特性及根系变化进而影响坡面入渗过程。通过人工模拟降雨试验,设计4个坡耕地坡度(3°,5°,10°,15°)及2个降雨强度(40,80 mm/h),在谷子4个生育期(拔节初期、拔节中期、抽穗初期、灌浆初期)开展试验,探究坡度和生育期对谷子坡耕地土壤入渗特征的影响机制,并结合入渗模型(Horton、Kostiakov、Philip模型)对谷子坡耕地土壤水分入渗过程进行拟合并评价其适用性。结果表明:(1)随坡度增加土壤入渗能力下降,与3°相比,
付世琳, 姚冲, 余倩, 吴发启
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Dimensional Assembly Engineering of Ce‐MOF Interfaces for Selective Recognition of Phytic Acid
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Selective molecular recognition is central to chemical sensing yet discriminating structurally similar molecules at complex interfaces remains challenging. Traditional strategies based on tuning size, charge, or binding‐site chemistry often suffer from limited flexibility.
Qiang Miao +7 more
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, 2001 采用运动波理论和两次改进后的Green-Ampt入渗模型建立了坡面降雨入渗产流的动力学模型，并得到了实验资料的良好验证。运用该模型研究了简单坡面上降雨入渗产流的动力学规律，分析了雨强、土壤初始含水量、渗透系数、坡面阻力，以及坡长、坡度等因素对坡面产流过程的影响规律 ...
陈力, 李家春, 刘青泉
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Shuitu Baochi Xuebao, 2018 浑水灌溉是我国黄河流域引黄灌区灌溉的主要特点，其中浑水中的泥沙含量对土壤入渗特性有较大的影响，为揭示浑水膜孔灌交汇入渗的减渗特性，通过开展浑水及清水膜孔灌入渗试验，建立了浑水膜孔灌自由入渗相对于清水的减渗率及浑水膜孔灌多向交汇入渗相对于自由入渗的减渗率与入渗时间之间的量化关系，提出了由清水膜孔灌自由入渗量推求浑水膜孔灌多向交汇入渗量的模型。结果表明：浑水膜孔灌自由入渗较清水的减渗量随入渗时间的延长而增大，但增大幅度慢慢变小，入渗后期其减渗量基本呈线性增加，其减渗率随时间的增大先快速增大后缓慢减小 ...
钟 韵, 费良军, 陈 琳, 傅渝亮
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