Results 41 to 50 of about 29,573 (213)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao +11 more
wiley +1 more source
Guangtongxin yanjiu, 2018 搭建一个双向拉曼放大超长跨距光纤传输系统,在接收端采用非线性补偿算法来补偿因传输距离长和入纤光功率高所带来的光纤非线性效应,并通过实验成功实现了10Gbaud/s 16正交幅度调制（QAM）信号的传输,传输距离为300km。仿真和实验结果表明,通过采用非线性补偿算法,接收端信号的性能相比未使用非线性补偿算法时提高了2dB。证明了非线性补偿技术在超长跨距光纤传输系统中是非常有效且必要的。
周文婷 +7 more
doaj
The Research of Sea Wave Overflow Forecast along Fujian Coast [PDF]
, 2016 本文利用第三代海浪模式SWAN基于非结构三角形网格和矩形网格分别对1319号“天兔”、1323号“菲特”两场台风影响下的福建沿岸有效波高进行了数值模拟。其中，福建中部A海堤的三角形网格模拟的平均绝对误差分别为0.15m、0.16m，而矩形网格的平均绝对误差分别为0.23m、0.22m；三角形网格模拟的均方根误差分别为0.19m、0.20m，而矩形网格的均方根误差分别为0.26m、0.28m，说明两种网格的模拟值与实测值较吻合。然而三角形网格的模拟效果更好一些。这说明 ...
张敬
core
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 2, Page 207-219, February 2026.ABSTRACT Objective To test the non‐inferiority of extended abdominopelvic ultrasound examination compared with contrast‐enhanced computed tomography (CT) and whole‐body diffusion‐weighted magnetic resonance imaging (WB‐DWI/MRI) in discriminating preoperatively between resectable and non‐resectable disease based on the European Society for Medical ...
D. Fischerova +26 more
wiley +1 more source
The Basic Study on Rare Earth Nd3+ Ion Doped Polymer Optical Waveguide Amplifier [PDF]
, 2016 近年来，有机聚合物材料以其独特的性能、低廉的成本受到越来越多的重视。聚合物光电子器件如阵列波导光栅、电光调制器、光开关和光波导放大器等几乎已经涉及了集成光学的各个领域。光波导放大器的原理是利用掺入光波导中的稀土离子在泵浦光作用下产生受激辐射来实现信号光的放大。本论文以三元钕配合物Nd(TTA)3(TPPO)2作为有源材料，制备了硅基聚合物光波导放大器，研究了器件在1060nm波长处的增益特性。所做的具体工作如下： 1.合成了三元钕配合物Nd(TTA)3(TPPO)2(HTTA:2 ...
李小龙
core
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT Urban expansion significantly impacts flood risk, particularly in rapidly growing areas where impervious surfaces exacerbate surface runoff. This study examines spatial patterns of urban growth and their effects on flood exposure in Mecklenburg County, North Carolina, from 2011 to 2021.
Pegah Madadi, Azad Sadeghi
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 采用现有方法分析索网结构非线性动力反应时,仅能对矩形平面索网结构建立等效单自由度(ESDF)模型,地震作用下,此类结构的响应只能采用时程法进行计算。基于结构整体刚度参数的概念,结合模态推覆分析方法,建立了任意形状索网结构的非线性ESDF模型,该模型刚度特性与Duffing系统相同。采用能量平衡法,导出了索网结构非线性ESDF体系的等效线性刚度ke与位移反应d的关系;结合ESDF体系的等效质量,将加速度-周期(a-T)格式的设计反应谱变换为刚度-位移(k-d)格式;与ke ...
罗立胜, 陈志华, 韩小燕
doaj
International Journal of Applied Linguistics, Volume 36, Issue 1, Page 522-539, February 2026.ABSTRACT This paper examines the features of metadiscourse across different teacher moves in university linguistics classroom discourse and the teaching strategies reflected in its use. The results reveal that teachers employ diverse metadiscourse during classroom interactions to support student reasoning.
Jingjie Li, Wenjie Hu
wiley +1 more source
Study on Dependence between China Mainland’s and the Main International Stock Markets Based on Different Perspectives [PDF]
, 2016 随着经济全球化的不断推进，国际资本市场逐渐呈现一体化趋势。作为反映国民经济的“晴雨表”和资本市场的重要组成部分，各国股票市场间存在怎样的关系呢？股市间的相依性结构对投资者合理制定投资组合策略以及监管当局有效防范国内外股市风险，维护市场稳定，推进股市健康发展具有重要的启示意义。中国已经成为全球第二大经济体，大陆股票市场也在近十年迅速发展。研究中国大陆股票市场与世界股票市场间的相依性结构具有重要的现实意义。 股市间的相依性历来是人们关心的重点，学者们对其进行了大量的研究。阅读已有相关文献 ...
崔振
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT In this study, an in‐depth investigation was carried out to elucidate the energy and structural modifications in connection with the property of corrosion resistance. The strategy is to employ the fictive temperature (Tf) as the indicator of the energy state of amorphous alloys.
Liang Yang +10 more
wiley +1 more source