动态变化 - Open Access .click

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Shuitu Baochi Xuebao, 2003
分析了生物地球化学循环中植物—土壤生态系统的有机物动态,土壤有机质(SOM)主要库类——土壤C,N,P,S循环特点;阐述了土壤有机质的生物地球化学循环模型CENTURY结构。利用CENTURY模型模拟土地利用变化情形下内蒙古草原生态典型区土壤有机质动态。由数值模拟结果分析看,CENTURY对自然和人为活动影响下生态系统的土壤有机质动态有良好的模拟能力,同时又可有效地反映土地利用类型变化对生态环境和土壤侵蚀的影响。
张佳华徐永福等
doaj +2 more sources

Changes in the transformative potential of action proposals in Finnish Red Lists from 1986 to 2019

Conservation Biology, EarlyView.
Abstract Red lists provide critical knowledge regarding biodiversity decline, especially in Finland, where broad assessments have been made regularly since the 1980s. They deliver information on the threat status of species and ecosystems, propose actions to guide conservation policy, and have the potential to spur transformative change.
Anni Arponen +4 more
wiley +1 more source

2000-2020年昌吉州东部平原区地下水位埋深对土地利用及干旱时空演变的动态响应

Shuitu Baochi Xuebao, 2000
联合土地利用与覆被变化及气象干旱综合分析区域地下水位埋深变化及其动态响应关系,明晰地下水位埋深变化的阶段性主导因素,对地下水超采地区综合治理和地下水资源有效管控具有现实意义。选取昌吉州东部平原区2000-2020年78眼地下水监测井月尺度地下水位埋深数据资料及5期遥感影像数据并结合同期多尺度标准化降水蒸散发指数SPEI,分析不同时空尺度地下水位埋深对土地利用/覆被变化及SPEI的动态响应规律,探讨研究区土地利用变化与干旱变化趋势对地下水埋深变化的综合影响。结果表明 ...
刘坤, 高凡, 吴彬, 胡鑫
doaj

Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal

Conservation Biology, EarlyView.
Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
wiley +1 more source

Scientists’ warning on the global destruction of rock outcrop ecosystems

Conservation Biology, EarlyView.
Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source

Psychometric framework for coexistence with large carnivores

Conservation Biology, EarlyView.
Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source

Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source

Auto-focus technology and its application based on image processing

, 2009
Auto-focusing technique is an important method to improve the precision,intelligentization,automatization for the indentation diameter measurement.The paper introduces an auto-focus method of indentation diameter measurement based on image processing ...
Chen, Xiaomei, Yang, Tao, Zuo, Yong
core

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
wiley +1 more source

黄土坡面产流动态变化过程实验模拟

, 2007
采用模拟降雨试验方法对黄土坡面产流动态变化过程进行研究,取得了如下结果:(1)不同雨强条件下,坡面径流率随降雨过程的动态变化可用对数相关方程描述,5-10min之间径流率随降雨过程的变化幅度较大,以后变缓,并趋于基本稳定状态;(2)不同坡度条件下,坡面径流深随降雨强度的动态变化可用线性相关方程进行描述,坡面径流深随降雨强度的增加而急剧增大;(3)不同雨强条件下,坡面径流深随坡度的动态变化总体可用抛物线相关方程进行描述,25°左右是径流深随坡度变化的转折点;(4)不同雨强条件下 ...
马春艳, 谭贞学, 王占礼
core

气候变化