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100 cm^(2) Organic Photovoltaic Cells with 23%Efficiency under Indoor Illumination

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Chinese Journal of Polymer Science 2022年第8期40卷 979-988,I0011页

作者： Yong Cui Hui-Feng Yao Ye Xu peng-qing bi Jian-Qi Zhang Tao Zhang Ling Hong Zhi-Hao Chen Zhi-Xiang Wei Xiao-Tao Hao Jian-Hui Hou Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China CAS key laboratory of nanosystem and hierarchical fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China

The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad *** organic semiconductors intrinsically have less ordered intermolecular packing than inorganic materials,the relatively larger energetic disorder is one of the main results that limit the photovoltaic efficiency of the OPV cells at low carrier ***,we optimize the alkyl chains of non-fullerene acceptors to get suppressed energetic *** find the optimal acceptor DTz-R1 with the shortest alkyl chain has the strongest crystalline property and lowest energetic *** a result,over 26%efficiency is recorded for the 1 cm^(2) OPV cells under a light-emitting diode illumination of 500 *** also fabricate a 100 cm^(2) cell device and get a PCE of 23.0%,which is an outstanding value for large-area OPV *** results suggest that modulation of the energetic disorder is of great importance for further improving the efficiency of OPV cells,especially for indoor applications.

关键词： Organic photovoltaic cells Low light intensity Energetic disorder Energy loss Power conversion efficiency

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-peng Yang Song Xie Zi-Meng Han Hao-Cheng Liu Chong-Han Yin Wen-bin Sun Zhang-Chi Ling Huai-bin Yang De-Han Li qing-Fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Improved spatial filtering velocimetry and its application in granular flow measurement

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Chinese Physics B 2020年第7期29卷 300-307页

作者： Ping Kong bi-De Wang peng Wang Zivkovic V Jian-qing Zhang Shanghai Key Laboratory for Molecular Imaging Shanghai University of Medicine and Health SciencesShanghai 201318China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Chemical Engineering and Advanced Materials Newcastle UniversityNE17RUUnited Kingdom College of Medical Imaging Shanghai University of Medicine and Health SciencesShanghai 201318China

Spatial filtering velocimetry(SFV)has the advantages of simple structure,good stability,and wide ***,the traditional linear CCD-based SFV method requires an accurate angle between the direction of linear CCD and the direction of moving object,so it is not suitable for measuring a complex flow field or two-dimensional speed in a granular *** this paper,a new extension of spatial filtering method(SFM)based on high speed array CCD camera is proposed as simple and effective technique for measuring two-dimensional speed field of granular *** particular,we analyzed the resolution and range of array CCD-based SFV so that the reader can clarify the application scene of this *** method has a particular advantage for using orthogonal measurement to avoid the angle measurement,which were problematic when using linear CCD to measure the ***,the end-wall effects of the granular flow in rotating drum is studied with different experimental conditions by using this improved technique.

关键词： spatial filtering velocimetry array CCD end-wall effects resolution

PM_(2.5) obtained from urban areas in Beijing induces apoptosis by activating nuclear factor-kappa B

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Military Medical Research 2017年第4期4卷 200-209页

作者： Hui peng Xiao-Hong Zhao Ting-Ting bi Xiao-Yan Yuan Jia-bin Guo Shuang-qing peng Evaluation and Research Center for Toxicology Institute of Disease Control and Prevention Academy of Military Medical Sciences Beijing Key Laboratory of bioactive Substances and Functional Foods Beijing Union University

Background: Particulate matter(PM), which has adverse effects on citizen health, is a major air pollutant in Beijing city. PM_(2.5) is an indicator of PM in urban areas and can cause serious damage to human health. Many epidemiological studies have shown that nuclear factor-kappa B(NF-κB) is involved in PM_(2.5)-induced cell injury, but the exact mechanisms are not well ***: The cytotoxic effects of PM_(2.5) at 25–1600μg/ml for 24 h were determined by MTT assay in Chinese hamster ovary cells(CHO) cells. Flow cytometry was used to determine the apoptosis rate induced by PM_(2.5). The destabilized enhanced green fluorescent protein(d2 EGFP) green fluorescent protein reporter system was used to determine the NF-κB activity induced by PM_(2.5). The expression of pro-apoptotic Bcl-2-associated death promoter(BAD) proteins induced by PM_(2.5) was determined by Western blotting to explore the relationship between PM_(2.5) and the NF-κB signaling pathway and to determine the toxicological mechanisms of PM_(2.5).Results: PM_(2.5) collected in Beijing urban districts induces cytotoxic effects in CHO cells according to MTT assay with 72.28% cell viability rates even at 200μg/ml PM_(2.5) and flow cytometry assays with 26.97% apoptosis rates at 200μg/ml PM_(2.5). PM_(2.5) increases the activation levels of NF-κB, which have maintained for 24 h. 200μg/ml PM_(2.5) cause activation of NF-κB after exposure for 4 h, the activation peak appears after 13.5 h with a peak value of 25.41%. The average percentage of NF-κB activation in whole 24 h is up to 12.90% by 200μg/ml PM_(2.5). In addition, PM_(2.5) decreases the expression level of the pro-apoptotic protein BAD in a concentration-dependent ***: PM_(2.5) induces NF-κB activation, which persists for 24 h. The expression of pro-apoptotic protein BAD decreased with increased concentrations of PM_(2.5). These findings suggest that PM_(2.5) plays a major role in apoptosis by activating the NF-κB signaling path

关键词： Particulate matter NF-κB pathway Apoptosis BAD protein

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糖尿病早期视网膜神经变性研究新进展

国际眼科杂志 2025年第1期25卷 76-81页

作者：魏凡彭立谢青中南大学湘雅医学院附属海口医院眼科海南省海口市570208

糖尿病视网膜病变(DR)是由慢性高血糖引起的晚期微神经血管并发症,可导致血-视网膜屏障受损和视网膜功能障碍。近年来研究发现,糖尿病视网膜神经变性(DN)可能是糖尿病的视网膜改变最早事件之一,主要表现包括:新诊断糖尿病患者的视网膜... 详细信息

糖尿病视网膜病变(DR)是由慢性高血糖引起的晚期微神经血管并发症,可导致血-视网膜屏障受损和视网膜功能障碍。近年来研究发现,糖尿病视网膜神经变性(DN)可能是糖尿病的视网膜改变最早事件之一,主要表现包括:新诊断糖尿病患者的视网膜电图反应缺陷;发病初期,小胶质细胞和Müller细胞在几周内自我激活并激活相关蛋白;神经递质(如DOPA/GABA)活性降低,损害神经节信号传递;早期线粒体功能障碍,如Drp1-Fis1持续裂变及mtDNA甲基化和碱基错配之间的潜在串扰等。探讨糖尿病早期视网膜神经变性的分子基础对于理解DN的发病机制及早期治疗至关重要。文章总结糖尿病早期视网膜感光功能及神经胶质细胞、神经递质、线粒体和其他因子的病理变化及机制,旨在为研究DN早期机制及靶向治疗提供理论依据。

关键词：糖尿病视网膜病变糖尿病视网膜神经变性视网膜电图线粒体自噬神经胶质细胞多巴胺

Some nonlinear parameters of PP intervals of pulse main peaks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第8期8卷 1256-1262页

作者： HAN qing-peng WANG Ping School of biomedical Engineering and Instrument Science Zhejiang University Hangzhou 310027 China

The PP intervals of pulse main peaks from healthy and unhealthy people(arrhythmia) have different nonlinear char-acteristics. In this paper,the extraction of PP intervals of pulse main peaks is achieved by picking up P peaks of pulse wave with wavelet transform. Furthermore,several nonlinear parameters(correlative dimensions,maximum Lyapunov exponents,com-plexity and approximate entropy) of the PP intervals of pulse main peaks extracted from normal and unhealthy pulse signals are calculated,with the results showing that these nonlinear parameters calculated from the main wave interval signals are helpful for analyzing human's health state and diagnosing heart diseases.

关键词： PP intervals of pulse main peaks Phase space reconstruction Correlative dimension Lyapunov exponent Complexity Approximate entropy

Static recrystallization behavior of 25CrMo4 mirror plate steel during two-pass hot deformation

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Journal of Iron and Steel Research International 2017年第2期24卷 222-228页

作者： peng Zhou qing-xian Ma Department of Mechanical Engineering Tsinghua University Beijing 100084 China Key Laboratory for Advanced Materials Processing Technology of Ministry of Education Tsinghua University Beijing 100084 China

The static recrystallization behavior of 25CrMo4 mirror plate steel has been determined by hot compression testing on a Gleeble 1500 thermal mechanical simulation tester. Compression tests were performed using double hit schedules at temperatures of 950-- 1 150 ~C, strain rates of 0.01--0.5 s-1 , and recrystallization time of 1--100 s. Results show that the kinetics of static recrystallization and the microstructural evolution were greatly influenced by the deformation parameters （deformation temperature, strain rate and pre strain） and the initial austenite grain size. Based on the experimental results, the kinetics model of static recrystallization has been generated and the comparison between the experimental results and the predicted results has been carried out. It is shown that the predicted results were in good agreement with the experimental results.

关键词： Hot deformation Static recrystallization 25CrMo4 Kinetics equation Microstructure

Ancestral developmental potentials in early bony fish contributed to vertebrate water-to-land transition

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Zoological Research 2021年第2期42卷 135-137页

作者： Xu-peng bi Guo-Jie Zhang BGI-Shenzhen ShenzhenGuangdong 518083China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Villum Center for biodiversity Genomics Section for Ecology and EvolutionDepartment of BiologyUniversity of CopenhagenCopenhagen 2100Denmark

The water-to-land transition was a major step in vertebrate evolution and eventually gave rise to the tetrapods, including amphibians, reptiles, birds, and mammals. The first land invasion of our fish ancestors is con... 详细信息

关键词： invasion al. transition

Theoretical analysis on elastic buckling of nanobeams based on stress-driven nonlocal integral model

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Applied Mathematics and Mechanics(English Edition) 2020年第2期41卷 207-232页

作者： peng JIANG Hai qing Cunfa GAO State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Several studies indicate that Eringen's nonlocal model may lead to some inconsistencies for both Euler-Bernoulli and Timoshenko beams, such as cantilever beams subjected to an end point force and fixed-fixed beams subjected a uniform distributed load. In this paper, the elastic buckling behavior of nanobeams, including both EulerBernoulli and Timoshenko beams, is investigated on the basis of a stress-driven nonlocal integral model. The constitutive equations are the Fredholm-type integral equations of the first kind, which can be transformed to the Volterra integral equations of the first kind. With the application of the Laplace transformation, the general solutions of the deflections and bending moments for the Euler-Bernoulli and Timoshenko beams as well as the rotation and shear force for the Timoshenko beams are obtained explicitly with several unknown constants. Considering the boundary conditions and extra constitutive constraints, the characteristic equations are obtained explicitly for the Euler-Bernoulli and Timoshenko beams under different boundary conditions, from which one can determine the critical buckling loads of nanobeams. The effects of the nonlocal parameters and buckling order on the buckling loads of nanobeams are studied numerically, and a consistent toughening effect is obtained.

关键词： Laplace transformation Volterra integral equation Fredholm integral equation stress-driven nonlocal integral model