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Interface optimization and defects suppression via Na F introduction enable efficient flexible Sb_(2)Se_(3) thin-film solar cells

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Journal of Energy Chemistry 2024年第3期90卷 165-175,I0006页

作者： Mingdong Chen Muhammad Ishaq Donglou ren hongli Ma Zhenghua Su Ping Fan David Le Coq Xianghua Zhang Guangxing Liang Shuo Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiChina CNRS ISCR(Institut des Sciences Chimiques de Rennes)UMR 6226Universitéde RennesRennes F-35000France

Sb_(2)Se_(3) with unique one-dimensional(1D) crystal structure exhibits exceptional deformation tolerance,demonstrating great application potential in flexible devices.However,the power conversion efficiency(PCE) of flexible Sb_(2)Se_(3) photovoltaic devices is temporarily limited by the complicated intrinsic defects and the undesirable contact interfaces.Herein,a high-quality Sb_(2)Se_(3) absorber layer with large crystal grains and benign [hkl] growth orientation can be first prepared on a Mo foil substrate.Then NaF intermediate layer is introduced between Mo and Sb_(2)Se_(3),which can further optimize the growth of Sb_(2)Se_(3)thin film.Moreover,positive Na ion diffusion enables it to dramatically lower barrier height at the back contact interface and passivate harmful defects at both bulk and heterojunction.As a result,the champion substrate structured Mo-foil/Mo/NaF/Sb_(2)Se_(3)/CdS/ITO/Ag flexible thin-film solar cell delivers an obviously higher efficiency of 8.03% and a record open-circuit voltage(V_(OC)) of 0.492 V.This flexible Sb_(2)Se_(3) device also exhibits excellent stability and flexibility to stand large bending radius and multiple bending times,as well as superior weak light photo-response with derived efficiency of 12.60%.This work presents an effective strategy to enhance the flexible Sb_(2)Se_(3) device performance and expand its potential photovoltaic applications.

关键词： Sb_(2)Se_(3) Flexible solar cells NaF intermediate layer Interface optimization Defects suppression

Bidirectional energy-controlled piezoelectric shunt damping technology and its vibration attenuation performance

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International Journal of Mechanical System Dynamics 2024年第1期4卷 63-76页

作者： Yipeng Wu Quan Yuan Kaibin ren Xin Shen Hui Shen Adrien Badel hongli Ji Jinhao Qiu State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina College of Mechanical and Electrical Engineering Qingdao UniversityQingdaoChina SYMME Laboratory Universite Savoie Mont BlancAnnecy le VieuxFrance

Piezoelectric material-based semi-active vibration control systems may effectively suppress vibration amplitude without any external power supply,or even harvest electrical energy.This bidirectional electrical energy control phenomenon is theoretically introduced and validated in this paper.A flyback transformer-based switching piezoelectric shunt circuit that can extract energy from or inject energy into piezoelectric elements is proposed.The analytical expressions of the controlled energy and the corresponding vibration attenuation are therefore derived for a classical electromechanical cantilever beam.Theoretical predictions validated by the experimental results show that the structure vibration attenuation can be tuned from−5 to−25 dB under the given electrical quality factor of the circuit and figure of merit of the electromechanical structure,and the consumed power is in the range of−13 to 25 mW,which is a good theoretical basis for the development of self-sensing,self-adapting,and self-powered piezoelectric vibration control systems.

关键词： vibration control piezoelectric shunt damping electromechanical energy

Will the Historic Southeasterly Wind over the Equatorial Pacific in March 2022 Trigger a Third-year La Niña Event?

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Advances in Atmospheric Sciences 2023年第1期40卷 6-13页

作者： Xianghui FANG Fei ZHENG Kexin LI Zeng-Zhen HU hongli ren Jie WU Xingrong CHEN Weiren LAN Yuan YUAN Licheng FENG Qifa CAI Jiang ZHU Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China International Center for Climate and Environment Science(ICCES) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China Climate Prediction Center NCEP/NWS/NOAACollege ParkMD 20740USA State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China National Climate Center Beijing 100081China National Marine Environmental Forecasting Center Beijing 100081China Mailbox 5111 Beijing 100094China

Based on the updates of the Climate Prediction Center and International Research Institute for Climate and Society(CPC/IRI)and the China Multi-Model Ensemble(CMME)El Niño-Southern Oscillation(ENSO)Outlook issued in April 2022,La Niña is favored to continue through the boreal summer and fall,indicating a high possibility of a three-year La Niña(2020-23).It would be the first three-year La Niña since the 1998-2001 event,which is the only observed three-year La Niña event since 1980.By examining the status of air-sea fields over the tropical Pacific in March 2022,it can be seen that while the thermocline depths were near average,the southeasterly wind stress was at its strongest since 1980.Here,based on a quaternary linear regression model that includes various relevant air-sea variables over the equatorial Pacific in March,we argue that the historic southeasterly winds over the equatorial Pacific are favorable for the emergence of the third-year La Niña,and both the anomalous easterly and southerly wind stress components are important and contribute~50%of the third-year La Niña growth,respectively.Additionally,the possible global climate impacts of this event are discussed.

关键词： El Niño-Southern Oscillation three-year La Niña strongest southeasterly wind air-sea interaction

Representation of the ENSO Combination Mode and its Asymmetric SST Response in Different Resolutions of HadGEM3

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Advances in Atmospheric Sciences 2018年第8期35卷 167-180页

作者： Jianghua WAN hongli ren Peili WU Laboratory for Climate Studies and CMA-NJU Joint Laboratory for Climate Prediction Studies National Climate Center China Meteorological Administration Beijing 100081 China Department of Atmospheric Sciences School of Environment Studies University of Geoscience Wuhan 430074 China Met Office Hadley Center Exeter EX1 3PB UK

Previous studies have revealed a combination mode （C-mode） occurring in the Indo-Pacific region, arising from nonlinear interactions between ENSO and the western Pacific warm pool annual cycle. This paper evaluates the simulation of this C-mode and its asymmetric SST response in HadGEM3 and its resolution sensitivity using three sets of simulations at horizontal resolutions of N96, N216 and N512. The results show that HadGEM3 can capture well the spatial pattern of the C-mode associated surface wind anomalies, as well as the asymmetric response of SST in the tropical Pacific, but it strongly overestimates the explained variability of the C-mode compared to the ENSO mode. The model with the three resolutions is able to reproduce the distinct spectral peaks of the C-mode at the near annual combination frequencies, but the performance in simulating the longer periods is not satisfactory, presumably due to the unrealistic simulation of the ENSO mode. Increasing the horizontal resolution can improve the consistency between atmospheric and oceanic representations of the C-mode, but not necessarily enhance the accuracy of C-mode simulation compared with observation.

关键词： ENSO combination mode asymmetric response Nifio-A index HadGEM3 horizontal resolution

基于时空综合分型的El Niňo事件对中国东部降水的影响差异

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大气科学学报 2024年第4期47卷 521-532页

作者：任宏利刘芊仪刘明竑王润中国地质大学(武汉)环境学院大气科学系湖北武汉430078 中国气象科学研究院灾害天气国家重点实验室/青藏高原气象研究所北京100081

基于1961—2022年中国高分辨率降水格点资料、合成分析和经验正交函数分解方法,揭示了时空综合分型得到的生命史较长-异常中心位置偏东的低频-东部(LF-EP)型和生命史较短-异常中心位置偏西的准两年-中部(QB-CP)型El Ni1o事件对中国东部... 详细信息

基于1961—2022年中国高分辨率降水格点资料、合成分析和经验正交函数分解方法,揭示了时空综合分型得到的生命史较长-异常中心位置偏东的低频-东部(LF-EP)型和生命史较短-异常中心位置偏西的准两年-中部(QB-CP)型El Ni1o事件对中国东部降水的不同影响。结果表明,LF-EP型事件对降水的影响显著且稳定:自发展年秋季到衰减年夏季长达近4个季节,长江以南区域降水持续地显著偏多,且异常雨带中心自衰减年春季起逐步北抬。QB-CP型事件发生时降水异常特征变化更加复杂多变:发展年夏秋季其空间分布与LF-EP型事件中的特征大致相反,长江以南区域降水整体偏少,冬季开始长江以南逐渐有正异常降水出现,且春季以后异常雨带表现出逐渐南退特征,至衰减年夏季发展为华北-长江中下游-华南地区降水异常“正-负-正”分布。进一步通过比较不同类型事件中大尺度水汽输送的差异探讨了其影响不同的可能机制,发现由海温异常纬向位置差异导致的西太平洋区域大气环流直接响应以及衍生模态响应差异是造成中国东部降水异常空间分布特征差异的重要原因。同时,两类时空事件持续性和转相时间的差异也会使得对降水影响的时间尺度出现差别。

关键词： El Ni?o 时空综合分型中国东部降水异常雨带演变衍生模态

Trans-PRK联合预防性快速CXL矫正薄角膜或角膜形态欠规则屈光不正的疗效及安全性

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中华实验眼科杂志 2024年第4期42卷 361-366页

作者：张林丽狄宇李莹邓洪莉任燕王璐包头朝聚眼科医院包头014060 中国医学科学院、北京协和医学院、北京协和医院眼科北京100730

目的评估经上皮准分子激光屈光性角膜切削术(Trans-PRK)联合预防性快速角膜交联术(CXL)矫正薄角膜或角膜形态欠规则(除外圆锥角膜)屈光不正的疗效及安全性。方法采用系列病例观察研究方法,纳入2017年8月至2018年7月于包头朝聚眼科医院... 详细信息

目的评估经上皮准分子激光屈光性角膜切削术(Trans-PRK)联合预防性快速角膜交联术(CXL)矫正薄角膜或角膜形态欠规则(除外圆锥角膜)屈光不正的疗效及安全性。方法采用系列病例观察研究方法,纳入2017年8月至2018年7月于包头朝聚眼科医院诊断为薄角膜或角膜形态欠规则并行Trans-PRK联合预防性CXL手术的近视患者55例55眼,所有患者均取右眼数据进行分析。术前、术后1周及术后1、3、6、12个月采用国际标准视力表检测术眼裸眼远视力(UDVA);采用电脑验光和综合验光检测屈光度。术前及术后3、6、12个月采用Pentacam眼前节分析仪检查角膜形态;术前及术后1、3、6、12个月采用非接触式眼压计测量眼压。记录术后并发症发生情况。结果术前、术后1周及术后1、3、6和12个月术眼UDVA(LogMAR视力)分别为0.52(0.55,0.78)、0.22(0.12,0.17)、0.10(0.04,0.07)、0.00(-0.04,-0.16)、-0.08(-0.05,-0.03)、-0.08(-0.06,-0.04),总体比较差异有统计学意义(Z=249.44,P<0.001),其中术后各时间点UDVA均较术前提高,术后3、6和12个月术眼UDVA较术后1周和1个月明显改善,差异均有统计学意义(均P<0.001)。术眼术后各时间点球镜度较术前均明显下降,术后1、3、6和12个月术眼球镜度低于术后1周,术后12个月术眼球镜度低于术后3和6个月,差异均有统计学意义(均P<0.001)。术后1、3、6和12个月术眼柱镜度低于术前和术后1周,差异均有统计学意义(均P<0.05)。术眼术后等效球镜度随时间延长逐渐下降,趋于正视状态;术后各时间点术眼等效球镜度低于术前,术后1、3、6和12个月术眼等效球镜度低于术后1周,术后12个月低于术后3和6个月,差异均有统计学意义(均P<0.001)。术后3、6及12个月术眼角膜K1值、K2值均明显低于术前,差异均有统计学意义(均P<0.001),术后3个月角膜K1值、K2值趋于稳定。术后3、6、12个月术眼眼压均显著低于术前,术后6和12个月术眼眼压低于术后1和3个月,差异均有统计学意义(均P<0.001)。术后1周1眼出现0.5级角膜上皮下雾状混浊,于术后1个月角膜自行恢复透明。结论Trans-PRK联合预防性快速CXL手术矫治合并薄角膜或角膜形态欠规则的(除外圆锥角膜)屈光不正眼具有良好的有效性、稳定性及安全性。

关键词：屈光不正角膜激光手术角膜交联术经上皮准分子激光屈光性角膜切削术疗效安全性

Progress in ENSO prediction and predictability study

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National Science Review 2018年第6期5卷 826-839页

作者： Youmin Tang Rong-Hua Zhang Ting Liu Wansuo Duan Dejian Yang Fei Zheng hongli ren Tao Lian Chuan Gao Dake Chen Mu Mu State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography Environmental Science and Engineering University of Northern British Columbia Prince George Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences Qingdao National Laboratory for Marine Science and Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences College of Oceanography Hohai University International Center for Climate and Environment Science Institute of Atmospheric PhysicsChinese Academy of Sciences Laboratory for Climate Studies & CMA—NJU Joint Laboratory for Climate Prediction Studies National Climate CenterChina Meteorological Administration College of Atmospheric and Oceanic Science Fudan University

ENSO is the strongest interannual signal in the global climate system with worldwide climatic, ecological and societal impacts. Over the past decades, the research about ENSO prediction and predictability has attracted broad attention. With the development of coupled models, the improvement in initialization schemes and the progress in theoretical studies, ENSO has become the most predictable climate mode at the time scales from months to seasons. This paper reviews in detail the progress in ENSO predictions and predictability studies achieved in recent years. An emphasis is placed on two fundamental issues: the improvement in practical prediction skills and progress in the theoretical study of the intrinsic predictability limit. The former includes progress in the couple models, data assimilations, ensemble predictions and so on, and the latter focuses on efforts in the study of the optimal error growth and in the estimate of the intrinsic predictability limit.

关键词： ENSO prediction and predictability coupled model ensemble prediction optimal error growth probabilistic prediction

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钨矿碱分解工艺制备仲钨酸铵全流程仿真计算

中南大学学报（自然科学版） 2024年第1期55卷 43-54页

作者：龚丹丹张勇周红丽钱汉麟马爱顺任嗣利李明周江西理工大学稀有稀土资源开发与利用省部共建协同创新中心江西赣州341000 江西理工大学资源与环境工程学院江西赣州341000 崇义章源钨业股份有限公司江西崇义341300 江西理工大学材料冶金化学学部江西赣州341000

以钨矿碱分解工艺制备仲钨酸铵全流程为对象,基于质量守恒、化学平衡、元素分配约束和指标约束等原理,构建钨矿配矿、磨矿、碱分解、脱磷、离子交换、除钼和蒸发结晶的热力学模型,进而根据各工序物料的迁移传递关系,应用MetCal软件平台... 详细信息

以钨矿碱分解工艺制备仲钨酸铵全流程为对象,基于质量守恒、化学平衡、元素分配约束和指标约束等原理,构建钨矿配矿、磨矿、碱分解、脱磷、离子交换、除钼和蒸发结晶的热力学模型,进而根据各工序物料的迁移传递关系,应用MetCal软件平台,开发钨矿碱分解工艺制备仲钨酸铵全流程仿真计算系统,并采用典型工况下的实际值对模型计算的可靠性进行实例验证。研究结果表明:碱分解浓料中WO_(3)和P质量分数计算值与实际值的相对误差分别为-5.755%和-12.195%,钨渣中WO3、P、Fe、Mn和Ca质量分数的相对误差分别为-2.026%、-5.439%、-14.819%、-14.971%和11.826%;脱磷后液中WO3和P质量分数的相对误差分别为5.513%和-7.692%,脱磷渣中WO_(3)、P和Ca质量分数的相对误差分别为-5.834%、3.337%和7.113%;除钼后液中WO3和Mo质量分数的相对误差分别为-1.627%和-9.375%,除钼渣中WO_(3)、Mo、S和Cu质量分数的相对误差分别为2.547%、-8.827%、8.686%和9.692%。

关键词：钨冶炼碱分解全流程仿真计算离子交换

基于MobileViT的岩石薄片图像岩性识别方法研究

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地质通报 2024年第6期43卷 938-946页

作者：王琼杨杰霍凤财董宏丽任伟建于涛东北石油大学电气信息工程学院黑龙江大庆163318 东北石油大学人工智能能源研究院黑龙江大庆163318 黑龙江省网络化与智能控制重点实验室黑龙江大庆163318 东北石油大学三亚海洋油气研究院海南三亚572000 大庆油田有限责任公司第四采油厂工艺研究所黑龙江大庆163511

岩石薄片图像中包含了大量肉眼无法观察到的地质特征信息,对岩石薄片图像的岩性识别结果为后续的石油勘探和开发奠定了基础。针对岩性识别数据集不均衡、识别模型参数多等问题,提出一种改进的轻量化MobileViT模型,该模型针对涵盖了90%... 详细信息

岩石薄片图像中包含了大量肉眼无法观察到的地质特征信息,对岩石薄片图像的岩性识别结果为后续的石油勘探和开发奠定了基础。针对岩性识别数据集不均衡、识别模型参数多等问题,提出一种改进的轻量化MobileViT模型,该模型针对涵盖了90%以上常见岩性的岩石薄片图像进行建模分析。首先,为使模型更好地学习到每类岩石薄片图像中所包含的独特特征,对数据集进行数字增加。其次,使用GELU替换MobileViT中MV2模块中常规ReLU6,从而作为该模块的激活函数,有效解决神经元死亡的问题,提升模型的收敛速度。最后,划分训练集和测试集,使用余弦退火算法自动更新学习率,以迁移学习加速训练过程,实现岩石薄片图像中针对岩性的自动识别。实验结果表明,改进后的MobileViT对岩性识别的准确率达82.9%,模型的参数仅为7.66M,通过实例验证该算法具有较好的鲁棒性。

关键词：岩石薄片岩性识别 MobileViT 余弦退火轻量化