Results 21 to 30 of about 16,781 (160)
智慧农业, 2023 目的/意义人工智能（Artificial Intelligence，AI）技术已在学术和工程应用领域掀起了研究高潮，在地球物理参数和农业气象遥感参数反演方面也表现出了强大的应用潜力。目前大部分AI技术在地学和农学的应用还是“黑箱”，没有物理意义或缺乏可解释性及通用性。为了促进AI在地学和农学的应用和培养交叉学科的人才，本研究提出基于AI耦合物理和统计方法的地球物理参数反演范式理论。方法首先基于物理能量平衡方程进行物理逻辑推理，从理论上构造反演方程组，然后基于物理推导构建泛化的统计方法 ...
MAO Kebiao +15 more
doaj +1 more source
Spatial structure and distribution simulation of Aphis gossipii Glover population based on GIS [PDF]
, 2010 Based on geographic information system (GIS) and geostatistical analysis, this paper studied the spatial structure of Aphis gossipii Glover population in Xiangshan District of Zhongwei City, Ningxia Province, with the spatial distribution of the ...
Cai, Feng-huan +7 more
core
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
Spatia-l temporal variability of soil salt content before and after irrigation in the Yellow River Delta [PDF]
, 2013 分别采用传统统计学和地统计学方法,定量分析了灌溉前、后黄河三角洲田块尺度下不同深度土层含盐量的空间变异性并分析空间分布特征。结果表明:除灌溉前0~10 cm土层土壤含盐量呈强变异性外,其余各土层含盐量均表现为中等变异强度;灌溉前土壤盐分主要积聚在0~10 cm和40~60 cm土层,灌溉后主要积聚在40~60 cm土层;灌溉使得0~10 cm和10~20 cm土层土壤含盐量降低,脱盐效果较好;除灌溉后0~10 cm土层的土壤盐分含量呈现弱空间相关性之外,其它土层均呈现强空间相关性;灌溉后与灌溉前相比 ...
于君宝 +4 more
core +1 more source
Conservation Biology, EarlyView.Abstract Procedural, distributional, recognitional, and epistemic justice aspects of conservation interventions are well documented in contexts where pastoralism is a key livelihood and way of life. Geospatial analyses and representations of wildlife conservation and restoration that are increasingly applied in pastoralist rangeland socioecological ...
Ryan R. Unks
wiley +1 more source
Impacts of Spartina alterniflora invasion on soil and plant nitrogen pools of mangrove ecosystem, Zhangjiang estuary [PDF]
, 2012 生物入侵是世界各国共同面临的生态问题，不仅对本地生态系统生物多样性造成威胁，而且潜在的改变的了被入侵生态系统的物理特性和生态过程。滨海湿地生态系统有较为充足的外源输入，但其初级生产力一般仍受到氮资源的限制，因此外来种积累生物量所采取的氮利用策略对其入侵成功十分关键。除海南省外我国沿海红树林分布区都已有互花米草侵占大量滩涂，对红树林生态系统的生物多样性造成影响，但目前对互花米草入侵如何影响红树林生态系统氮循环的研究仍较为欠缺。本文以福建省漳江口国家级红树林保护区内的本地红树桐花树 ...
杨翼
core
Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework
Conservation Biology, EarlyView.Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift +8 more
wiley +1 more source
TCD与低剂量双源性CTA对海南地区原居住居民后循环缺血及椎基底动脉易损斑块分布规律的研究
Zhongguo shiyan zhenduanxue, 2016 目的探讨海南地区原住居民后循环血管缺血情况及椎基底易损斑块分布规律。方法 2015年1月—2015年8月期间对海南地区原住居民及内地迁居人群进行经颅多普勒(TCD)及低剂量双源CT血管造影(CTA)头颈血管筛查,共800例海南地区原住居民及500例内地迁居居民作为研究对象纳入研究。结果海南地区原住居民与内地迁居居民血管的狭窄部位多在椎基底动脉,经统计学检验发现二者血管狭窄部位构成有统计学差异(χ2=13.203,P=0.001)。海南地区原住居民L-VA、BA的Vs值,R-PCA、BA的Vm值,R ...
栾岚 +4 more
doaj
Systematic protection and restoration of water bodies in collapse areas based on surface runoff regulation [PDF]
In order to solve the problems of surface runoff disorder, poor water connectivity, and weak hydrodynamic water circulation capacity in high groundwater level mining areas in the east, and to reduce the non-point source pollution and point source ...
Dong GUO +5 more
core +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This computational linguistic study analyzes 8743 Rednote posts to examine how sentiment, emotion, and content domain collectively shape social comparison dynamics on social media. We identify four key findings: (1) an emotional gradient, where upward comparison content exhibits the highest sentiment scores and downward comparison the lowest; (
Michelle Mingyue Gu +7 more
wiley +1 more source