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Improved interfacial adhesion for stable flexible inverted perovskite solar cells

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Journal of Energy Chemistry 2023年第1期76卷 288-294,I0008页

作者： Jie Dou qizhen song Yue Ma Hao Wang Guizhou Yuan Xueyuan Wei Xiuxiu Niu Sai Ma Xiaoyan Yang Jing Dou Shaocheng Liu Huanping Zhou Cheng Zhu Yihua Chen Yujing Li Yang Bai Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low-dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Peking UniversityBeijing 100871China

Flexible perovskite solar cells have attracted widespread attention due to their unique advantages in lightweight,high flexibility,and easy deformation,which are suitable for portable ***,the inverted(p-i-n)structured devices suffer from poor stability largely due to the low adhesion at the brittle interface(the hole transport layer/perovskite).Herein,zeolitic imidazolate framework-67(ZIF-67)is applied to inverted structured cells to optimize the interface and prolong the device *** a result,the flexible devices based on ZIF-67 obtain the champion power conversion efficiency of 20.16%.Over 1000 h under continuous light irradiation,the device retains 96%and 80%of its original efficiency without and with bias,***,devices show mechanical endurance with over 78%efficiency retention after 10,000 cycles of consecutive bending cycles(R=6 mm).The introduction of ZIF-67 suppresses the cracking in device bending,which results in improved environmental stability and bending durability.

关键词： ZIF-67 Flexible perovskite solar cells Interfacial adhesion Stability

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一种基于有机电光聚合物的全光纤电场传感器

光学学报 2024年第22期44卷 35-46页

作者：宋奇震刘锋杨彦博张文香吴梓烨李卓奇李志斌樊鹏鹏唐洁媛朱文国郑华丹钟永春陈哲余健辉暨南大学物理与光电工程学院光电工程系暨南大学光电信息与传感技术广东普通高校重点实验室

本文提出了一种基于分散红1/聚甲基丙烯酸甲酯聚合物（DR1/PMMA）与微纳锥形双模光纤（TTMF）结构的全光纤电场传感器，相比于传统的电场传感器，采用全光纤的结构最大程度减少了杂散电磁场对外界电磁场测量的电磁干扰问题。其中，经电... 详细信息

本文提出了一种基于分散红1/聚甲基丙烯酸甲酯聚合物（DR1/PMMA）与微纳锥形双模光纤（TTMF）结构的全光纤电场传感器，相比于传统的电场传感器，采用全光纤的结构最大程度减少了杂散电磁场对外界电磁场测量的电磁干扰问题。其中，经电极化处理之后的有机电光聚合物薄膜，电光系数达到了3.68 pm/V，并且有机电光聚合物薄膜质地柔软，可以更好地与高性能的光纤器件结合。实验证明，可以利用有机电光聚合物实现光纤器件的二阶非线性光学功能。本文使用锥形双模光纤作为基模与高阶模的模态干涉仪，经测试，在折射率为1.55～1.56时，器件的折射率灵敏度达到了8154.76 nm/RIU（灵敏度单位），在外加电场增大时，器件传输的干涉光谱会发生蓝移，在电场下具有相对较高的0.86 dB/V的灵敏度。

关键词：光纤传感器分散红1/聚甲基丙烯酸甲酯聚合物锥形双模光纤结构模态干涉

Aberrant DNA methyltransferase 1 expression in clear cell renal cell carcinoma development and progression

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Chinese Journal of Cancer Research 2014年第4期26卷 371-381页

作者： Ming Li Ying Wang Yongsheng song Renge Bu Bo Yin Xiang Fei qizhen Guo Bin Wu Department of Urology Shengjing Hospital of China Medical University Department of Cell Biology Harvard Medical School Department of Nuclear Medicine The First Affiliated Hospital of China Medical University

Objective： To better understand the contribution of dysregulated DNA methyltransferase 1 （DNMT1） expression to the progression and biology of clear cell renal cell carcinoma （ccRCC）. Methods： We examined the differences in the expression of DNMT1 in 89 ecRCC and 22 normal tissue samples by immunohistochemistry. In addition, changes in cell viability, apoptosis, colony formation and invading ability of ccRCC cell lines （786-0 and Caki-1） were assessed after transfection with DNMT1 siRNA. Results： We found DNMT1 protein was significantly higher expressed in ccRCC than that of in no-tumor tissues （56.2% and 27.3%, respectively, P=0.018）. The expression of DNMT1 was strongly associated with ccRCC tumor size, tumor pathology stage, histological grading, lymph node metastasis, vascular invasion, recurrence and prognosis. Moreover, knockdown of DNMT1 expression significantly inhibited ccRCC cell viability, induced apoptosis, decreased colony formation and invading ability. Conclusions： Expression of DNMTI protein is increased in ccRCC tissues, and DNMT1 expression is associated with poor prognosis of patients. Experiments in vitro further showed DNMT1 played an essential role in proliferation and invasion of renal cancer cells. Moreover, targeting this enzyme could be a promising strategy for treating ccRCC, as evidenced by inhibited cell viability, increased apoptosis, decreased colony formation and invading ability.

关键词： Clear cell renal cell carcinoma (ccRCC) DNA methyltransferase I (DNMT1) immunohistochemistry siRNA

Wearable Alignment‑Free Microfber‑Based Sensor Chip for Precise Vital Signs Monitoring and Cardiovascular Assessment

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Advanced Fiber Materials 2022年第3期4卷 475-486页

作者： Liangye Li Yunfei Liu Changying song Shunfeng Sheng Liuyang Yang Zhijun Yan Dora Juan Juan Hu qizhen Sun School of Optical and Electronic Information and National Engineering Laboratory for Next Generation Internet Access System(NGIA)and Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and TechnologyWuhan 430074HubeiChina Institute for Infocomm Research Singapore 138632Singapore

Continuous pulse wave signals monitoring is the essential basis for clinical cardiovascular diagnosis and *** researches show the majority of current electronic pulse sensors usually face challenges in electrical safety concern,poor durability and demanding precision in position ***,a highly sensitive,inherently electrical safe,robust and alignment-free device is highly ***,we present a wearable alignment-free microfber-based sensor chip(AFMSC)for precise vital signs monitoring and cardiovascular health *** AFMSC comprises an optical micro/nano fber sensor(MNF)and a fexible soft liquid sac while the MNF sensor is used to perceive the physiological signals and the liquid sac is used to eliminate the *** real-time and accurate monitoring of the pulse signals was realized by tracking the optical power variation of transmitted light from ***,the cardiovascular vital signs extracted from radial artery pulse signals were used to evaluate cardiovascular health condition and the results were in accordance with human physiological ***,the pulse signals from diferent arterial area,the respiration signals from chest and the radial pulse signals before and after exercise were detected and *** non-invasive,continuous and accurate monitoring of cardiovascular health based on the reported wearable and alignment-free device is promising in both ftness monitoring and medical diagnostics for cardiovascular disease prevention and diagnosis.

关键词： Optical microfber sensor Wearable,alignment-free Physiological signal Cardiovascular health

Hydrogen embrittlement behavior of Inconel 718 alloy at room temperature

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Journal of Materials Science & Technology 2019年第4期35卷 499-502页

作者： Xinfeng Li Jin Zhang Eiji Akiyama Qinqin Fu qizhen Li School of Mechanical and Materials Engineering Washington State University Department of Geosciences Stony Brook University Institute for Materials Research Materials Design DivisionTohoku University State Key Laboratory for Mechanical Behaviors of Materials School of Materials Science and EngineeringXi'an Jiaotong University

Hydrogen embrittlement of Inconel 718 alloy was investigated. Multi-scale observation technique were employed, comprising slow strain rate tensile tests, scanning electron microscopy and transmission electron microscopy analysis. The results demonstrate that hydrogen charging deteriorates mechanical properties of the alloy. Inconel 718 alloy shows partial Portevin-Le Chatelier(PLC) effect at room temperature when hydrogen charging current density is 220 mA cm^(-2) and 590 mA cm^(-2). Moreover, plastic deformation features with dislocation cells are detected in hydrogen-induced brittle zone. Thus, it is concluded that dragging effect of hydrogen atoms on dislocations contributes to PLC effect.

关键词： Embrittlement Hydrogen in metals Inconel 718 alloy Portevin-Le Chatelier effect

China’s Recent Progresses in Polar Climate Change and Its Interactions with the Global Climate System

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Advances in Atmospheric Sciences 2023年第8期40卷 1401-1428页

作者： Xichen LI Xianyao CHEN Bingyi WU Xiao CHENG Minghu DING Ruibo LEI Di QI qizhen SUN Xiaoyu WANG Wenli ZHONG Lei ZHENG Meijiao XIN Xiaocen SHEN Chentao song Yurong HOU Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100China Qingdao National Laboratory for Marine Science and Technology Qingdao 266061China Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China CMA-FDU Joint Laboratory of Marine Meteorology Shanghai 200438China School of Geospatial Engineering and Science Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-sen UniversityZhuhai 519082China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Key Laboratory for Polar Science of the MNR Polar Research Institute of ChinaShanghai 200136China Polar and Marine Research Institute Jimei UniversityXiamen 361021China Polar Research and Forecasting Division National Marine Environmental Forecasting CenterBeijing 100081China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

During the recent four decades since 1980,a series of modern climate satellites were launched,allowing for the measurement and record-keeping of multiple climate parameters,especially over the polar regions where traditional observations are difficult to *** has been actively engaging in polar *** observations were conducted during this period,accompanied by improved Earth climate models,leading to a series of insightful understandings concerning Arctic and Antarctic climate ***,we review the recent progress China has made concerning Arctic and Antarctic climate change research over the past *** Arctic temperature increase is much higher than the global-mean warming rate,associated with a rapid decline in sea ice,a phenomenon called the Arctic *** Antarctic climate changes showed a zonally asymmetric pattern over the past four decades,with most of the fastest changes occurring over West Antarctica and the Antarctic *** Arctic and Antarctic climate changes were driven by anthropogenic greenhouse gas emissions and ozone loss,while tropical-polar teleconnections play important roles in driving the regional climate changes and extreme events over the polar *** climate changes may also feedback to the entire Earth climate *** adjustment of the circulation in both the troposphere and the stratosphere contributed to the interactions between the polar climate changes and lower *** change has also driven rapid Arctic and Southern ocean *** researchers have made a series of advances in understanding these processes,as reviewed in this paper.

关键词： polar climate change recent progress in China Arctic amplification tropical-polar interactions global sea level rise stratospheric circulation

Automatic and continuous blood pressure monitoring via an optical-fiber-sensor-assisted smartwatch

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PhotoniX 2023年第1期4卷 335-348页

作者： Liangye Li Shunfeng Sheng Yunfei Liu Jianpei Wen Changying song Zhipeng Chen Wangyang Xu Zhi Zhang Wei Fan Chen Chen qizhen Sun Perry-Ping Shum School of Optical and Electronic Information National Engineering Research Center for Next Generation Internet Access System(NGIA)Huazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders Division of CardiologyHuazhong University of Science and TechnologyTongji Medical CollegeTongji HospitalWuhan 430074China Huawei Technologies Co LtShenzhen 218129China Huazhong University of Science and Technology HUST-Wuxi Research InstituteWuxi 214174China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China

Automatic and continuous blood pressure monitoring is important for preventing cardiovascular diseases such as *** evaluation of medication effects and the diagnosis of clinical hypertension can both benefit from continuous *** current generation of wearable blood pressure monitors frequently encounters limitations with inadequate portability,electrical safety,limited accuracy,and precise position ***,we present an optical fiber sensor-assisted smartwatch for precise continuous blood pressure monitoring.A fiber adapter and a liquid capsule were used in the building of the blood pressure smartwatch based on an optical fiber *** fiber adapter was used to detect the pulse wave signals,and the liquid capsule was used to expand the sensing area as well as the conformability to the *** sensor holds a sensitivity of-213μw/kPa,a response time of 5 ms,and high reproducibility with 70,000 *** the assistance of pulse wave signal feature extraction and a machine learning algorithm,the smartwatch can continuously and precisely monitor blood pressure.A wearable smartwatch featuring a signal processing chip,a Bluetooth transmission module,and a specially designed cellphone APP was also created for active health *** performance in comparison with commercial sphygmomanometer reference measurements shows that the systolic pressure and diastolic pressure errors are-0.35±4.68 mmHg and-2.54±4.07 mmHg,*** values are within the acceptable ranges for Grade A according to the British Hypertension Society(BHS)and the Association for the Advancement of Medical Instrumentation(AAMI).The smartwatch assisted with an optical fiber is expected to offer a practical paradigm in digital health.

关键词： Blood pressure Optical fiber sensor Smartwatch

正交异性板有碴桥面钢桥力学性能及静力分析方法的研究

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铁道学报 1990年第2期12卷 71-80页

作者：宋慕兰董其震北方交通大学

本文以主梁为实腹板梁的道碴桥面正交异性板桥梁为对象,对其静力特性作了较详尽的分析,并对纵横梁体系进行了比较计算,说明在铁路桥梁中使用此种结构型式的合理性及优越性。文中还介绍了计算方法及为微机开发的计算机软件。

关键词：正交异性板钢桥力学性能静力分析桥面结构逐步分析法荷载分析数学模拟

基于生态文明治理的云南少数民族伦理档案文献遗产发掘研究

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档案学研究 2020年第2期 51-57页

作者：华林宋梦青杜其蓁云南大学历史与档案学院昆明650091

云南少数民族伦理档案文献是珍贵民族文化遗产,蕴含有丰富的人与自然和谐共存、可持续发展等生态伦理思想,这些伦理思想的发掘传播与转化创新,对生态文明治理工作有促进作用。本文探析少数民族伦理档案文献的生态文明治理价值,分析发掘... 详细信息

云南少数民族伦理档案文献是珍贵民族文化遗产,蕴含有丰富的人与自然和谐共存、可持续发展等生态伦理思想,这些伦理思想的发掘传播与转化创新,对生态文明治理工作有促进作用。本文探析少数民族伦理档案文献的生态文明治理价值,分析发掘要素,提出生态文明治理发掘对策。本文认为,以协同治理、记忆传承、文化自觉和转化创新理念,整合发掘主体,开展资源建设,发掘档案文献,进行引导性和约束性生态文明治理,可推进云南民族地区,乃至国家生态文明建设工作的开展。

关键词：生态文明伦理档案文献遗产少数民族