Results 31 to 40 of about 8,624 (160)
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
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Shuitu Baochi Xuebao, 2020 研究黄土高原侵蚀环境下林地开垦后坡面土壤养分空间分布状况，确立林地开垦后侵蚀驱动的坡地土壤养分空间变异特征。以黄土高原丘陵区子午岭林地和开垦28年的侵蚀坡面为研究对象，分析土壤主要性质和养分含量的变化情况，运用经典统计学和地统计法分析坡面土壤基本性质和养分空间分布规律。林地开垦后坡面土壤pH增加了0.24个单位，有机质、全氮、全磷和铵态氮、硝态氮、速效磷和速效钾分别降低了13.77，1.14，0.10 g/kg和6.05，1.63，4.99，58.44 mg/kg。林地的土壤有机质 ...
王昭 +6 more
doaj
Network Structures and Performance of University-Industry Collaborative Innovation [PDF]
, 2017 产品创新的复杂性要求企业充分整合其内外部资源以获得长久的竞争优势。合作创新能够实现组织间资源共享，提高研发效率和成功率。本文以校企合作创新为研究对象，分析校企合作创新网络的演化过程，并分别研究了校企合作创新网络异质性和空间异质性与合作创新绩效的关系。 首先，进行数据抓取、整理和清洗以及相关信息提取。利用网络爬虫从美国专利商标局收集相关数据，进行数据清洗工作，得到原始数据集，包含研究所需的校企合作专利数据;通过原始数据集中的公司和学校名称，整理校企合作关系得到网络数据集，同时获取公司和学校坐标 ...
李茜
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Conservation Biology, EarlyView.Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
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Synthesizing Empirical Research on Learner Metacognition in Second Language Writing
International Journal of Applied Linguistics, EarlyView.ABSTRACT Despite considerable research interest in learner metacognition in second language (L2) writing, there is not yet a review that synthesizes the existing empirical findings and discusses their implications. To fill the void, this systematic review synthesized 39 empirical studies on learner metacognition in L2 writing and examined their salient
Chen Li, Icy Lee, Zhicheng Mao
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Shuitu Baochi Xuebao, 2023 为揭示黄土高原地区土壤可蚀性(K)的空间分布特征和影响因素,基于EPIC模型、几何平均粒径模型、Torri模型估算黄土高原地区K,并结合地理探测器比较土壤理化性质、海拔、坡度等要素对K空间分布的影响。结果表明:(1)EPIC模型、几何平均粒径模型、Torri模型估算的黄土高原地区K均值分别为0.036,0.034,0.041 。黄土高原以中可蚀性和中高可蚀性的土壤为主,不同模型对K的估算值有显著差异(F=4.460,p＜0.01)。(2)黄土高原K有较为显著的空间异质性,东部和西南地区K较高 ...
朱启明, 刘俊娥, 周正朝
doaj
Analysis on Land Suitability for Maize and Rapeseed Production Based on Data Mining Method [PDF]
, 2022 [Objective] Conducting multi-crop land suitability analysis was carried out in order to provide an accurate and effective method for crop planning, land use planning, and management of agricultural production.
Lin Yan, Zhang Chen, Zhou Hua
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International Journal of Applied Linguistics, Volume 36, Issue 1, Page 522-539, February 2026.ABSTRACT This paper examines the features of metadiscourse across different teacher moves in university linguistics classroom discourse and the teaching strategies reflected in its use. The results reveal that teachers employ diverse metadiscourse during classroom interactions to support student reasoning.
Jingjie Li, Wenjie Hu
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The Research on Varying-Coefficient Spatial Panel Data Model and it’s Application [PDF]
, 2010 传统的计量经济模型默认个体在空间上具有独立性和同质性，忽略了个体的空间相关性和异质性，使得估计结果存在偏误。而空间计量模型通过引入空间权重矩阵，能够解决个体的空间相关性和空间异质性问题，因而成为近年来计量经济学研究中一个重要的研究分支。空间面板数据模型既能解决普通面板数据模型只考虑空间异质性而忽略空间相关性的缺点，又能解决截面数据空间计量模型所存在的问题，因而成为空间计量学研究中最活跃的研究领域。 但是，普通的空间面板数据模型只是利用截距项来体现空间异质性，正如Elhorst(2003)所言 ...
邓明
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Estimation of global subsurface temperature anomaly based on multisource satellite observations [PDF]
, 2017 基于表层卫星遥感观测的中深层海洋遥感对于了解海洋内部异常及其动力过程有重要意义。如何从现有的海洋表层遥感观测资料提取海洋内部关键动力环境信息场是; 具有挑战性的海洋遥感技术前沿。本文采用支持向量回归(SVR)方法,通过卫星遥感观测获取的多源海表参量(海表高度异常(SSHA)、海表温度异常(S; STA)、海表盐度异常(SSSA)和海表风场异常(SSWA)),选择最优参量输入组合,感知海洋次表层温度异常(STA),并用实测Argo数据作精; 度验证。结果表明SVR模型可准确估算全球尺度的STA(1000;
严晓海, 汪小钦, 苏华, 黎文娥
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