Results 91 to 100 of about 37,682 (204)
ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García +1 more
wiley +1 more source
根据北盘江流域5个文站降雨,径流和悬移质输沙模数资料,采用线性函数和幂函数拟合降雨和径流,降雨和悬移质输沙模数、径流和悬移质输沙模数的相互关系,根据剩余标准差最小原则确定最优关系,并探讨了一个流域内单一雨量站资料和径流,悬移质输沙模数的关系。结果表明,流域平均降雨量与径流,悬移质输沙模数、径流与悬移质输沙模数之间存在较好相关关系,根据剩余标准差大小,确定用线性函数或幂函数表达 ...
安和平
doaj
An empirical analysis of the impact of the linkage between Shanghai and Hongkong stock market by the Shanghai- Hongkong Stock Connect Program [PDF]
“十二五”规划纲要明确提出,全面推动金融改革、开放和发展,稳步推进人民币利率市场化改革,并逐步实现人民币在资本项目下的自由兑换。在“十二五”纲要的指导下,我国针对人民币利率市场化改革,相继推出了一系列措施:成立自贸区、力推“一带一路”、筹建金砖银行及亚投行等,在此对外开放新格局下,2014年11月17日“沪港通”顺利推出。正如国务院总理李克强在博鳌论坛上所指出的,沪港通在促进沪港两地市场的开放和发展的同时,将加快我国资本市场的国际化进程。不言而喻,沪港通是我国推进资本账户开放 ...
许培荣
core
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo +8 more
wiley +1 more source
为了通过电机电流检测隔离开关的机械故障,对GW6H-252型隔离开关电机输出轴扭矩和电机相电流的关系进行研究。研制出一套电流监测系统,现场监测隔离开关动作过程中电机定子相电流和电机输出轴扭矩,采用希尔伯特变换提取电流包络,建立电机输出轴扭矩和电流包络的函数关系,并采用最小二乘法进行曲线拟合。研究结果表明,GW6H-252型隔离开关电机输出轴扭矩和电机相电流包络之间存在二次函数关系,函数相关度高达0.98,因此可以通过监测电机定子相电流对电机输出轴扭矩峰值进行预测,进而检测隔离开关机械故障。
黄聿琛 +5 more
doaj
Application Research of Photochemical Vapor Generation and Inductively Coupled Plasma Mass Spectrometry [PDF]
本论文建立了光化学蒸汽发生(PCVG)-电感耦合等离子体质谱(ICPMS)联用技术同时测定钴(Co)、砷(As)、锑(Sb)、硒(Se)、碲(Te)等五种元素及直接测定八种As和Se形态的方法。建立的在线分离测定方法具有快速和准确的特点,为Co、As、Sb、Se和Te的同时测定及As和Se形态的直接测定提供了新的技术手段。本论文分为4章,具体内容如下: 第1章介绍了环境中Co、As、Sb、Se、Te和不同As、Se形态的理化性质及危害,并对上述元素常用的分析测定方法和研究进展进行了概述 ...
朱建颖
core
Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
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
塔里木巴楚县瓦吉里塔格地区出露有与塔里木早二叠世大火成岩省的形成密切相关的大型钒钛磁铁矿床.基于多元统计分析对该矿区露头和大量钻孔岩心样品中Fe-Ti-V元素和部分主量元素数据开展了元素地球化学相关性研究.采用SPSS软件对大量数据进行相关分析和回归分析,计算各元素间的相关系数,Fe、Ti、V 3种元素的相关性分析结果表明:矿床中Fe、Ti和V之间均呈正相关,成矿元素与造岩元素之间存在负相关关系;建立伴生钒元素与铁和钛元素之间关系的回归方程V=-4. 984 + 0. 360 Fe+0.
ZHAOYali(赵亚莉) +8 more
doaj +1 more source
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
以广东省五华县典型崩岗洪积扇为研究对象,通过GPS RTK获取从扇顶到扇缘64个采样点的坐标、高程信息,并采集土壤样品进行理化性质的测定及分析,通过分形理论、回归分析和地统计学相结合的方法研究洪积扇土壤分形特征和空间变异规律,以及分形维数与土壤颗粒组成和养分含量的相关关系。结果表明:土壤颗粒组成和养分含量具有明显分异特征,且与分形维数的空间分布特征呈现出一定的规律性。从扇顶到扇缘,土壤粉粒、粘粒质量分数和养分含量逐渐增加,与分形维数呈显著正相关线性关系,砂粒质量分数则逐渐减少 ...
马 媛 +5 more
doaj

