Results 71 to 80 of about 34,473 (149)
Synthesizing Empirical Research on Learner Metacognition in Second Language Writing
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
变压器在空载合闸时将产生很大的励磁涌流,这种励磁涌流对变压器的稳定运行极为不利。为削减这种励磁涌流,提出了3种方法:控制三相开关合闸的时间法,内插电阻法和改变变压器绕组的分布法。理论分析和实验表明,这3种方法各有其优缺点,都能有效地削减励磁涌流,前两种方法的可行性更好。
陈艳, 陈小川, 高仕斌
doaj
Polyphenol oxidases (PPOs) depletion preserves endogenous proteins at their predicted molecular weights and enhances detectable enzymatic activities. (a) Less RbcL crosslinking in ppo mutant of Nicotiana benthamiana. Leaf extracts were incubated for 1 h, separated on protein gels, stained with Coomassie or analyzed by Western blot with the anti‐RbcL ...
Kaijie Zheng +4 more
wiley +1 more source
引入了一类新的带ψ 强单调映象的广义非线性拟变分包含.在Hilbert空间中使用极大η 单调映象的预解算子方法建立了这类变分包含解的存在性定理,构造了求此类变分包含解具误差的新迭代算法,并讨论了算法的收敛准则.
金茂明
doaj
Advancing Major Policy Change Analysis in the Advocacy Coalition Framework
ABSTRACT The Advocacy Coalition Framework (ACF) has been used extensively to study policy processes globally. Existing research, however, fails to sequence the combination of factors that influence policy change. Using theory‐testing process tracing and a within‐case study design focused on Ghana and Nigeria, we address these knowledge gaps by ...
Alex Osei‐Kojo +2 more
wiley +1 more source
针对PRI的调幅度较大或PRI较长的脉冲信号,普通平面变换法显得不直观,难以分辨出特征曲线.对此作者提出了一种将调幅度变小,将PRI变短的方法,即将待分选信号进行压缩平面变换后,使特征曲线变得明显而易于分选 ...
赵仁健, 熊平, 倪明
doaj
The Evolution of UAE's Africa Foreign Policy: Motivations, Strategies and Challenges
ABSTRACT Recent studies on the foreign policies of Gulf Cooperation Council (GCC) countries attribute their increasing involvement in Africa to security and economic considerations. However, only a few studies have investigated the foreign policies of the individual GCC countries in more detail for confirmation. Hence, using a neorealist perspective on
Osman Antwi‐Boateng +1 more
wiley +1 more source
变压器绕组变形测试是预防性试验不可缺少的试验项目,为提高工作效率,减少220 kV变压器拆接引线试验对设备造成的损害,大幅度降低试验拆接引线工作带来的高劳动强度,快速判断220 kV变压器绕组是否存在变形,笔者以频响法为主,短路阻抗法、电容变化法为辅,采用频响法、短路阻抗法、电容变化法3种方法,应用TDT5变形测试仪、HDZK-10 A低电压短路阻抗测试仪和AI600E型自动介损电桥,对220 kV变压器分别进行拆线与不拆线时绕组变形项目测试,通过3种试验方法所得数据进行对比分析,得出了220 ...
李顺尧, 谢建容
doaj
Basic income trials and the politics of scale: A research agenda
Abstract The growing popularity of basic income has led to extensive trials of the policy in numerous settings across the world. However, analysis of the politics of basic income, and in particular the political dynamics preceding and resulting from trial programs, lags. In response, we propose a research agenda that uses political scale to investigate
Jurgen De Wispelaere +2 more
wiley +1 more source
针对目前变压器游离气体气相色谱法分析需要人工取气、耗时过长等问题,文中提出了一种采用傅里叶红外光谱法对游离气体进行在线监测的方法。该方法通过电磁阀控制与气体继电器相连的集气器的工作,从集气器中自动取气进行光谱分析。游离气光谱分析过程中,采用分段比基线校正法对游离气吸收光谱进行校正,采用Tikhonov正则化特征变量方法从混合气体吸收光谱图冗杂的谱线中挑选特征变量,最后利用最小二乘支持向量机法建立定量分析模型,分析计算红外吸收光谱图,得到变压器游离态气体中各组分的体积分数。实验室实验结果表明 ...
王阳 +7 more
doaj

