Results 31 to 40 of about 12,560 (159)
Shuitu Baochi Xuebao, 2021 为探究春季解冻期覆沙黄土坡面能量参数动态响应时空演化过程，在相同放水流量（1 L/min）条件下，采用2个土壤处理（未冻坡面，冻结坡面）和4个覆沙厚度（0，1，2，3 cm）进行室内模拟冷冻和放水冲刷试验，系统分析了径流流速（V）、径流功率（W）、单位径流功率（P）和径流动能（E）在不同土壤处理和不同覆沙厚度条件下的时空演化过程。结果表明：（1）不同处理下的径流流速随产流时间的延长总体呈下降趋势，随着距坡顶距离的增大总体呈增大趋势。未冻坡面和冻结坡面径流流速的均值在0.23~0.35，0.18~0.35
王伟 +6 more
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Riverine Nutrients Export and its Biogeochemical Behavior in the Jiulong Estuary under Subtropical Storm Events [PDF]
, 2015 由于气候变化（极端暴雨事件增加）和人类活动干扰（人为氮磷输入增加），亚热带流域-近海生物地球化学过程与通量受到显著影响。本研究选取九龙江流域-河口系统作为整体研究对象，以九龙江河流-河口混合区作为重点研究对象，开展常态和暴雨事件河流-河口营养盐（氮、磷、硅）和悬浮颗粒物的综合观测，分析暴雨事件河流营养盐输出过程、通量及主要控制因素，探讨河口营养盐生地化行为对河流输入的响应关系。主要研究结论如下： （1）常态下九龙江两大干流（北溪、西溪）的营养盐氮磷时空分布受污染分布和类型、大坝滞留和水文条件的综合影响 ...
吴殷琪
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The realization of bifunctional perovskite devices integrating photovoltaic (PV) and light‐emitting diode (LED) capabilities requires precisely controlled grain architectures to facilitate dual carrier transport pathways. In this work, sulfaguanidine (SG) molecules were introduced into the perovskite solution to reconstruct the crystallization
Jiong Li +7 more
wiley +1 more source
The existing states and evolution of P and Fe in shallow sediments from the continental slope of northern South China Sea and their indication for the decomposition of gas hydrate [PDF]
, 2016 天然气水合物作为当前极具开发潜力的新型清洁能源，受到科学界的广泛关注。海平面下降、洋壳的构造运动、海底沉积物滑塌及洋底水温变化等都可能造成天然气水合物的失稳分解，分解释放的CH4在垂向运移过程中与上层电子受体发生AOM，使SMTZ等作用带磷铁的赋存形态发生变化。磷作为海洋生物的重要营养元素，在海洋生物地球化学循环中有着重要意义，与铁、硫元素及沉积有机质关系紧密，在早期成岩过程中扮演了重要角色；而铁作为地壳中丰度最高的氧化还原敏感性金属元素，在海洋沉积物中的氧化还原过程对磷、硫 ...
杨鸣
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Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 376-384, March 2026.ABSTRACT Objective To investigate whether combining abnormal morphological features observed on ultrasound in live pregnancies that ended in a first‐trimester miscarriage can predict an abnormal karyotype. Methods This retrospective observational cohort study was conducted at the early‐pregnancy assessment unit at University College London Hospital ...
T. Setty +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2023 为分析气候变化及植被和淤地坝等生态建设措施对径流变化的影响,选取宁夏典型入黄流域清水河和苦水河为研究对象,采用Pettitt突变方法分析研究流域气象水文和生态建设措施等要素的变异点,基于Budyko理论,通过建立水热耦合控制参数与生态建设措施的多元线性回归方程,构建耦合生态建设措施下的降水-径流模型,并对模型进行适用性评估,采用弹性系数法,量化不同生态建设措施对径流变化的贡献率。结果表明:研究流域径流均呈减小趋势,且年径流突变均发生在2000年;水热耦合控制参数与NDVI和淤地坝指数呈显著的正相关关系 ...
于坤霞 +8 more
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Assessment of devastated land in Northeast Asia by remote sensing environmental isotopes, measurement and infiltration capacity [PDF]
, 2013 科学研究費助成事業(科学研究費補助金)研究成果報告書：基盤研究(B)2009-2012課題番号 ...
Onda Yuichi, 恩田 裕一
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The poor Zn chemistry of Zn metal anode and sluggish reaction kinetics of cathodes at high mass loadings are two crucial issues for hindering the application of aqueous Zn‐ion batteries (AZIBs). Herein, the hierarchical porous N‐doped carbon fibers (HPNCFs) were proposed to simultaneously optimize the reversibility of Zn plating/stripping of ...
Song Yang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
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Shuitu Baochi Xuebao, 2004 通过对黄前库区流域森林主要类型刺槐林和油松林土壤结构状况和渗透性能的比较,研究了不同森林类型地表径流水的移动规律。在自然降雨后,以1m×1m为基本单位推算其可能产生的地表径流量,根据实际径流量推算地表径流水在径流过程中下渗的数量。研究结果表明:刺槐林的森林土壤结构相对较好,地表径流水下渗的速度较快,而流速较慢,因而产生的地表径流量较少;而油松林,特别是阳坡油松林的土壤结构较差,地表径流水下渗的速度较慢,而流速较快,因而产生的地表径流量较大。
李德生 张萍 张水龙 朱殿兴 鲁法典
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