Results 91 to 100 of about 57,925 (177)
Spatially Downscaling of Future Food Demand for Policy Planning
World Food Policy, Volume 12, Issue 1, May 2026.ABSTRACT Understanding the subnational dynamics of food demand, while accounting for the evolution of the agrifood system at the global level, remains a challenge for designing food policy to ensure food security. To link global agrifood systems with subnational food policy planning, we downscale per capita food demand for 62 food commodities at the ...
Chun Song +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2003 分析了利用神经网络进行时间序列预测的方法及其基本工作原理,并且利用神经 网络建立了土壤水分预测模型.试验结果表明:所建立的模型具有较好的预测效果;用神经网络建立土壤水分预测模型的方法是可行的.
刘洪斌, 武伟, 魏朝富
doaj +2 more sources
Zhongguo cuzhong zazhi摘要： 预测模型是用来预测个体发生目标事件概率或预测结局值的统计模型。预测模型结果可视化展现是开发预测模型全流程中必不可少的一部分。良好的预测模型展现形式不仅可以使预测结果具有更好的可读性、可解释性，也在很大程度上决定了其使用方式和便利性。本文将详细介绍各种预测模型的展现形式，并阐述各自的优缺点。随后结合脑血管病临床预测模型研究，通过研究示例逐一介绍不同展现形式在脑血管病研究中的应用。 Abstract: A prediction model is a statistical model ...
金奥铭，谷鸿秋
doaj +1 more source
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +4 more
wiley +1 more source
Research on Compiler Design and its Key Technologies for Embedded Systems [PDF]
, 2015 嵌入式系统处理器通常采用特定的指令集，其体系架构不具有通用性，因此，嵌入式系统的编译器开发无法满足不同嵌入式系统的软件开发需求，即使是通过移植方法来开发相应的嵌入式系统的编译器，也面临着可重定向方案设计等难题。针对嵌入式编译器的重定向难题，嵌入式系统对开发效率及高质量目标代码等多方面的需求，本论文就专用指令集嵌入式处理器（ASIPs）的编译器重定向、基于Cache的编译器优化及嵌入式多核静态调度等方面的理论和实践进行研究。 在对编译器的原理及理论基础进行介绍后 ...
陈本彬
core
International Journal of Applied Linguistics, Volume 36, Issue 2, Page 979-994, May 2026.ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley +1 more source
Dianci bileiqi, 2018 为了实现对输电线路上绝缘子污秽度的预测,提出一种基于遗传算法优化BP神经网络的绝缘子污秽度预测模型。鉴于BP算法在训练神经网络模型时其收敛速度慢、动态特性不够理想等不足,故本文提出利用遗传算法来提高预测的精度。本文不仅以风力、温度、降水量和相对湿度等气象因素作为输入量,同时也综合考虑空气质量指数（AQI）中PM2.5、PM10等环境因素指标作为输入量,以绝缘子盐密（ESDD）和灰密（NSDD）的预测值作为输出量,建立绝缘子污秽度的预测模型。结果表明:优化后的预测模型相较于BP神经网络模型预测更加准确。
王自立 +6 more
doaj
Earnings Management Motivations and Economic Consequences of Goodwill Impairment: Empirical Evidence from Chinese A-share Market [PDF]
, 2016 2006年2月，我国财政部颁布了《企业会计准则》，对商誉的后续处理采用与国际财务报告准则接轨的减值测试方法。商誉减值方法的运用，引起了理论界、实务界以及监管机构关于商誉会计处理方法优缺点的激烈争论。随着权益结合法的取消以及企业并购活动的日益活跃，商誉的经济意义凸显，商誉减值方法下的会计信息质量问题受到广泛关注，有必要厘清商誉减值的影响因素，探讨商誉减值的经济后果。本文基于中国制度背景，以2007-2013年A股上市公司为样本，实证检验了商誉减值的盈余管理动机，并基于投资者、分析师两类信息使用者视角 ...
卢煜
core
International Journal of Applied Linguistics, Volume 36, Issue 2, Page 1282-1292, May 2026.ABSTRACT Self‐regulated learning (SRL) as a key predictor of language learning has been widely studied, but few studies have examined it from a cross‐linguistic perspective. The present study investigated whether first language (L1) SRL strategy use transfers to second language (L2) SRL strategy use and the conditions under which this transfer occurs ...
Barry Bai, Xuan Zang, Gurpinder Lailli
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2019 【目的】比较肝脏影像报告和数据管理系统LI-RADS（v2013）和亚洲肿瘤峰会AOS标准对小肝癌的诊断价值。【方法】回顾性分析有肝细胞癌发病风险的220名共289处直径 ...
王影, 余深平
doaj