Results 11 to 20 of about 15,777 (116)
Shuitu Baochi Xuebao, 2022 为研究不同坡长客土坡面产流产沙及沟蚀特征差异变化,通过设计2个坡度(15°,20°)下不同坡长(2,4,6,8,10 m)的野外径流小区进行冲刷试验。结果表明:(1)初始产流时间变化范围与产流停止时间均随坡长增加而增大,产流率初期快速增加,达到初次峰值后呈现不规律波动,累积产流量随坡长增加而增多;产流率、累积产流量与坡长、产流时间及其交互作用呈极显著相关(p＜0.01),累积产流量在2种坡度下均与坡长、产流时间呈幂函数相关。(2)产沙率初期快速增加,达到初次峰值后随冲刷时间逐渐下降 ...
张馨予 +6 more
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Shuitu Baochi Xuebao, 2020 喀斯特槽谷区在降雨过程中极易发生水土流失，这使得该区生态环境被破坏。以喀斯特槽谷区为研究对象，通过室内模拟其典型顺/逆层坡面特征及地下孔裂隙发育程度，利用人工降雨试验研究不同雨强条件下地表地下产流特征，从而揭示喀斯特槽谷区地表地下产流机制。结果表明：（1）喀斯特槽谷区地表地下产流受雨强影响，小雨强（30 mm/h）条件下地下产流量大于地表产流量，中雨强（60 mm/h）条件下地表产流量增大且裸坡条件下地表产流量大于地下产流量，大雨强（90 mm/h）条件下裸坡与顺层坡的地表产流量均大于地下产流量。（2 ...
覃自阳, 甘凤玲, 何丙辉
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Shuitu Baochi Xuebao, 2023 作为水土流失重点预防保护区,大别山南麓裸地坡面水土流失严重,为探究该区典型裸地坡面径流泥沙对降雨的响应,利用自动化径流泥沙监测设备对裸地径流小区的降雨—径流-泥沙过程进行监测。以2020年全年侵蚀性降雨数据为基础,依据降雨峰值时序划分雨型,分析了4种雨型的累计产流产沙特征和次降雨的径流泥沙特征,并建立了累计产流产沙的最优函数模型。结果表明:(1)大别山南麓降雨事件的I30是影响降雨事件的泥沙量和径流系数的重要因素;前期集中型和中期集中型降雨事件的泥沙量与前48 h内的降雨量呈显著正相关。(2 ...
钟祎珣 +5 more
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Emerging applications of large language models in ecology and conservation science
Conservation Biology, EarlyView.Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides +5 more
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Shuitu Baochi Xuebao, 2020 基于试验站不同坡地措施（坡耕地和坡改梯）2016年和2017年的逐日降水、产流产沙数据，研究不同坡地措施和雨强下产流产沙规律特征，定量揭示坡改梯和坡耕地对产流产沙的影响。结果表明：（1）7月平均雨强I、最大雨强I30及坡地产流量最大，8月最大雨强I60与坡地产沙量最大，表明坡地产流产沙高峰期与雨强高峰期一致。（2）春夏两季产流、产沙量与I、I30和I60相关性显著（超过95%置信度检验）。其中坡耕地产流产沙量与I、I30、I60的相关系数整体高于坡改梯。春夏季坡耕地产沙量分别是坡改梯的3.91，7 ...
曹媛 +5 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Many existing rubrics for L2 argumentative writing prioritize form‐based linguistic accuracy and complexity while insufficiently addressing substantive argumentative rigor and effectiveness. This limitation is further complicated by cross‐cultural variation in rhetorical conventions and educational practices, which challenge the direct ...
Zihan Xu, Peiyun Liu
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Exploring English Language Learners’ Vocabulary Knowledge and Usage When Speaking
International Journal of Applied Linguistics, EarlyView.ABSTRACT Vocabulary forms a fundamental component of speaking ability, as it enables speakers to convey meaning accurately, fluently, and effectively. Although the relationship between vocabulary and speaking has been investigated to some extent, gaps remain in understanding the link between learners’ vocabulary knowledge and their speaking proficiency,
Junyan Guo, Martin East
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Shuitu Baochi Xuebao, 2004 20世纪以来，森林与坡面产流的研究取得长足进展，尤其是在我国研究得比较深入与广泛。观测实验仍然占绝对优势，径流小区实验仍是最广泛采用的方法。森林对坡面产流机制、坡面流态、产流量、产流过程、产流I临界值、地表径流与地下径流分割都有影响，以及森林枯落物层对径流都有重要影响。同时，坡面产流模型在森林水文学领域得到了应用。
王云琦 王玉杰 朱金兆 熊峰 肖江伟 吴云
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International Journal of Applied Linguistics, EarlyView.ABSTRACT This qualitative multiple case study explores multilingual postgraduate students’ academic identities through writing at an EMI university in Hong Kong, with a focus on how they gain legitimacy in knowledge‑making with their multilingual repertoires. Grounded in a poststructuralist understanding of identities as fluid and negotiated, the study
Siqi Song, Ken Lau
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Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, EarlyView.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
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