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混合式教学情境下外语教师的角色认同

外语电化教学 2024年第2期 63-69页

作者：何春秀孟宇陈坚林温州理工学院浙江省温州市325000 哈尔滨工业大学(威海) 山东省威海市264209 上海外国语大学上海市200083

该研究依据自我差异理论,基于全国9所高校13位外语教师的叙事问卷反馈,探究混合式教学情境下外语教师三个“自我”的重合和矛盾。研究发现:教师的理想自我、应然自我、实然自我皆认同课程设计者与管理者角色。教师的理想自我、应然自我... 详细信息

该研究依据自我差异理论,基于全国9所高校13位外语教师的叙事问卷反馈,探究混合式教学情境下外语教师三个“自我”的重合和矛盾。研究发现:教师的理想自我、应然自我、实然自我皆认同课程设计者与管理者角色。教师的理想自我、应然自我皆认同知识传授者与建构者角色,但是实然自我对该角色的认同程度相对传统面授课堂教学情境有所弱化。理想自我、应然自我、实然自我都反映外语教师对情感交互支持者角色的认识和重视不足。教师的实然自我凸显技术示范者与支持者角色,但是理想自我和应然自我并不认同该角色。教师需强化情感交互支持者及技术示范者与支持者的角色认同,承担起情感专家和教育技术使用专家的责任。

关键词：混合式教学角色认同理想自我应然自我实然自我

基于时移多尺度波动散布熵和改进核极限学习机的水电机组故障诊断

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工程科学与技术 2024年第3期56卷 41-51页

作者：徐哲熙刘婷任晟民陈建林吴凤娇王斌西北农林科技大学水利与建筑工程学院陕西杨凌712100

水电在能源供给结构改革中承担重要角色,随着风、光、潮汐等新型能源的不断接入,水电机组的负荷运行范围不断加宽,导致水电机组发生事故的概率增加,因此,开展水电机组智能故障诊断研究具有十分重要的现实意义。本文针对水电机组振动信... 详细信息

水电在能源供给结构改革中承担重要角色,随着风、光、潮汐等新型能源的不断接入,水电机组的负荷运行范围不断加宽,导致水电机组发生事故的概率增加,因此,开展水电机组智能故障诊断研究具有十分重要的现实意义。本文针对水电机组振动信号中蕴含大量噪声信号,干扰故障诊断的问题,提出一种时移多尺度波动散布熵和改进核极限学习机相结合的水电机组故障诊断方法。首先,结合信息熵理论与时移思想,在多尺度波动散布熵的基础上,采用时移理论替代多尺度波动散布熵(MFDE)中传统的粗粒化过程,提出时移多尺度波动散布熵(TSMFDE),通过仿真实验,证明所提方法具有良好的时序长度鲁棒性、抗噪性及特征提取能力,解决了传统多尺度熵粗粒化不足的问题。然后,利用具有可移植性强、寻优能力强和收敛速度快等特征的算术优化算法(AOA)对核极限学习机(KELM)的正则化参数和核函数参数进行寻优,建立AOA-KELM分类器,解决了KELM超参数难以调节的问题。最终,通过转子试验台模拟实验,将TSMFDE提取的特征输入分类器中,完成模式识别工作。仿真结果表明,所提模型取得最高的诊断精度,达到了100.0%,相对于其他流行模型,本文所提模型展现了明显的优势,验证了所提模型的良好诊断精度。

关键词：时移多尺度波动散布熵核极限学习机算术优化算法水电机组故障诊断

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钙钛矿太阳电池的离子液体添加剂工程

太阳能学报 2024年第4期45卷 72-84页

作者：曾雨熙陈建林田俏俏武子寒俱佳尧赵威长沙理工大学能源与动力工程学院可再生能源电力技术湖南省重点实验室长沙410114

分析利用离子液体(ILs)提升钙钛矿太阳电池(PSCs)性能的主要作用及原理,然后从调节钙钛矿薄膜的组织形貌、钝化缺陷、稳定钙钛矿相、提高环境稳定性、改善电导率等方面综述ILs作为添加剂应用于PSCs的进展,并展望其未来前景。

关键词：钙钛矿太阳电池稳定性离子液体界面改性添加剂工程

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Optimization of the process for preparing Al-doped ZnO thin films by sol-gel method

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Science China(Technological Sciences) 2009年第1期52卷 88-94页

作者： chen jianlin chen Ding chen ZhenHua College of Materials Science and Engineering Hunan UniversityChangsha 410082China

Transparent and conducting Al-doped ZnO thin films with c-axis-preferred orientation were prepared on glass substrate via sol-gel route. The physical and chemical changes during thermal treatment were analyzed by TG-DSC spectra and the crystallization quality was characterized by XRD patterns. The optimized preheating and post-heating temperatures were determined at ～420°C and ～530°C, respectively. From thermodynamic and kinetics views, we investigated the mechanism of orientation growth with (002) plane parallel to the substrates. The surface morphologies of the films, post-heated at 420°C, 450°C, 530°C and 550°C, respectively, were observed by SEM micrographs. The film post-heated at 530°C shows a homogenous dense microstructure and exhibits the minimum sheet resistance of 140 Ω/Sq. The visible optical transmittance of all the films is beyond 90%. In addition, the annealing treatment in vacuum can contribute greatly to the electrical conductivity.

关键词： transparent conducting oxide sol-gel method zinc oxide aluminum thin films

四丁基铵六氟磷酸盐对全无机CsPbI_(2)Br钙钛矿太阳电池的多功能界面改性

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硅酸盐学报 2024年第1期52卷 75-88页

作者：吴林陈建林曾雨熙赵威武子寒俱佳尧黄金成彭卓寅陈荐长沙理工大学能源与动力工程学院长沙410114

近年来,全无机钙钛矿太阳电池(PSCs)在光伏领域受到极大的关注,与有机-无机杂化PSCs相比,展现出更良好的湿、热和光稳定性;尤其是宽带隙Cs Pb I_(2)Br钙钛矿(1.92 e V)权衡了稳定性与光吸收性能,在叠层太阳电池和柔性太阳电池中展现出... 详细信息

近年来,全无机钙钛矿太阳电池(PSCs)在光伏领域受到极大的关注,与有机-无机杂化PSCs相比,展现出更良好的湿、热和光稳定性;尤其是宽带隙Cs Pb I_(2)Br钙钛矿(1.92 e V)权衡了稳定性与光吸收性能,在叠层太阳电池和柔性太阳电池中展现出巨大的应用潜力。然而,溶液法制备的Cs Pb I_(2)Br钙钛矿薄膜会在界面及晶界处产生各种缺陷而成为光生载流子的非辐射复合中心,同时它对水分子敏感而容易降解,从而降低器件的光电性能与稳定性。选用了一种同时具有缺陷钝化和疏水功能的界面改性剂——四丁基铵六氟磷酸盐(TBAPF6)对CsPbI_(2)Br钙钛矿薄膜进行表面改性。结果表明,TBAPF6的PF6-钝化了带正电荷的卤素空位,TBA+则钝化了带负电的阳离子空位,且改善了CsPbI_(2)Br/碳界面的能级排列,从而提高了器件的光电性能(结构为氧化铟锡/SnO2/CsPbI_(2)Br/TBAPF6/C),最高光电转换效率达到12.04%,开路电压为1.24 V,短路电流密度为14.60 mA/cm^(2),填充因子为67%;同时,长烷基链和氟原子能够有效阻挡空气中水分子的入侵,在35%~40%的湿度环境中16 h后保持了初始效率的80%,在空气环境85℃、72 h后保持了初始效率的70.2%,其湿热稳定性相比于原始器件获得了极大的提升。

关键词：六氟磷酸盐全无机钙钛矿界面改性缺陷钝化疏水性

自组装单分子空穴传输层在反式钙钛矿太阳电池的研究进展

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化学学报 2024年第3期82卷 348-366页

作者：刘雪朋李博桐韩明远张先付陈建林戴松元华北电力大学新能源学院新型薄膜太阳电池北京市重点实验室北京102206

空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9,9'-螺二... 详细信息

空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9,9'-螺二芴(spiro-OMe TAD)、聚[双(4-苯基)(2,4,6-三甲基苯基)胺](PTAA)等,空穴迁移率低、价格昂贵等缺点限制了其规模化应用.近年来,在反式PSC中自组装单分子层(self-assembledmonolayers,SAM)作为空穴传输层广泛应用,提升了器件性能.SAM分子结构中含有锚定官能团,可以在衬底上形成单分子薄膜,有着材料消耗小、无需添加剂、寄生吸收低、能够兼容叠层器件和有利于大面积制造等优点,已成为PSC领域的研究热点.本综述结合PSC发展,按照SAM分子结构中锚定基团的不同,对近年来基于SAM的空穴传输层的研究进行了分类和归纳,结合分子骨架变化分析了结构变化对其特性及器件性能的影响.最后,对SAM作为空穴传输层的发展做了总结和展望.

关键词：钙钛矿太阳电池空穴传输材料自组装单分子层光电转换效率稳定性

Nondestructive testing method based on lamb waves for localization and extent of damage

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Acta Mechanica Solida Sinica 2017年第1期30卷 65-74页

作者： jianlin chen Zheng Li Kezhuang Gong State Key Laboratory of Turbulence and Complex System College of EngineeringPeking University

Based on Lamb wave analysis of propagation in plate-like structures, a damage detection method is proposed that not only locates the position of the damage accurately but also estimates its size. Similar damage detection methods focus only on localization giving no quantitative estimation of extent. To improve detection, we propose two predictive circle methods for size estimation. Numerical simulations and experiments were performed for an aluminum plate with a hole. Two PZT configurations of different sizes were designed to excite and detect Lamb waves. From cross-correlation analysis, the damage location and extent can be determined. Results show that the proposed method enables a better quantitative resolution in detection, the size of the inspection area influences the accuracy of damage identification, and the closer is the inspected area to the damage, the more accurate are the results. The method proposed can be developed into a multiple-step detection method for multi-scale analysis with prospective accuracy.

关键词： Lamb wave Damage detection Cross correlation PZT wafer Aluminum plate

Chronological and Geochemical Study of the Cenozoic Potassic Felsic Igneous Rocks in Western Yunnan,SE Tibet:Implications for their Tectonic Mechanisms

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Acta Geologica Sinica(English Edition) 2022年第3期96卷 904-918页

作者： TANG Wanli chen jianlin TAN Rongyu State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100083China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China

Whether there is a relationship between widespread Cenozoic igneous rocks and the activated Ailao Shan-Red River shear zone(ASRR)in western Yunnan,SE Tibet,remains highly *** geochronological,and geochemical data derived from Cenozoic igneous rocks both within and far from the ASRR offers *** these coeval felsic rocks(36.9-33.5 Ma)are enriched in large-ion lithophile elements relative to high field strength elements,they also display some special geochemical features,such as high Y and Yb values of syenitic porphyries,which contrast with the high Sr and low Y contents of monzoporphyries and granitic *** syenitic porphyries exhibit geochemical characteristics similar to those of coeval mafic magmas,e.g.,high K 2 O,Y,and Yb contents,indicating that the former were probably generated by fractional crystallization of the ***,the high Sr/Y(56.1-109)monzoporphyries and granitic porphyries,combined with their low MgO,and Cr(or Ni)contents,suggest that they were mainly derived from partial melting of a thickened mafic lower *** that these Cenozoic magmatic events exhibiting planar distributions occurred outside of the activation of the ASRR(31-20 Ma),then they were not controlled by the ***,they were tied to convective removal of a thickened lower lithospheric mantle in western Yunnan during the Paleogene.

关键词： geochronology geochemistry igneous rocks Cenozoic Ailao Shan-Red River shear zone Yunnan Province

Factors Affecting Chinese Raters' Rating of High-Stakes English Exam Essays

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Chinese Journal of Applied Linguistics 2017年第2期40卷 208-228,230页

作者： chen jianlin Lanzhou Universit

This study consists of two questionnaire surveys conducted in two stages to investigate factors that high-stakes exam essay raters believe to affect their rating behavior. Raters were all university Chinese teachers of English majors. Seventy-three participants in stage one and 75 in stage two responded to the same questionnaire. Both exploratory factor analysis and confirmatory factor analysis were used in data analysis. Results showed that there were generally six broad factors interfering with the rating process： rating scale, rater training, rating supervision, rater characteristics, eye-catching text features and rating condition. The interaction of those factors reflected the tension between the constraints executed by the test institution and raters＇ own knowledge and understanding of essay rating. This study may shed light on measures taken to improve essay rating quality.

关键词： raters TEM-8 rating process rater behavior