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Optimal bulk-heterojunction morphology enabled by fibril network strategy for high-performance organic solar cells

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Science China Chemistry 2019年第6期62卷 662-668页

作者： Tian Xia Yunhao Cai huiting Fu Yanming Sun School of Chemistry Beihang University

A bicontinuous network formed spontaneously upon film preparation is highly desirable for bulk-heterojunction(BHJ) organic solar cells(OSCs). Many donor-acceptor(D-A) type conjugated polymers can self-assemble into polymer fibrils in the solid state and such fibril-assembly can construct the morphological framework by forming a network structure, inducing the formation of ideal BHJ morphology. Our recent works have revealed that the fibril network strategy(FNS) can control the blend morphology in fullerene, non-fullerene and ternary OSCs. It has been shown that the formation of fibril network can optimize phase separation scale and ensure efficient exciton dissociation and charge carriers transport, thus leading to impressive power conversion efficiencies(PCEs) and high fill factor(FF) values. We believe that FNS will provide a promising approach for the optimization of active layer morphology and the improvement of photovoltaic performance, and further promote the commercialization of OSCs.

关键词： organic solar cells bulk heterojunction polymer fibril fibril network strategy morphology

Optimal planning of battery energy storage considering reliability benefit and operation strategy in active distribution system

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Journal of Modern Power Systems and Clean Energy 2017年第2期5卷 177-186页

作者： Wenxia LIU Shuya NIU huiting XU State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

In this paper, a cost-benefit analysis based optimal planning model of battery energy storage system(BESS) in active distribution system(ADS) is established considering a new BESS operation strategy. Reliability improvement benefit of BESS is considered and a numerical calculation method based on expectation is proposed for simple and convenient calculation of system reliability improvement with BESS in planning phase. Decision variables include both configuration variables and operation strategy control variables. In order to prevent the interaction between two types of variables and enhance global search ability, intelligent single particle optimizer(ISPO) is adopted to optimize this model. Case studies on a modified IEEE benchmark system verified the performance of the proposed operation strategy and optimal planning model of BESS.

关键词： Battery energy storage system Cost-benefit analysis Reliability improvement benefit Operation strategy Intelligent single particle optimizer

Analysis on the Mutation and Time-Varying Characteristics of Coal Price System Evolution from the Perspective of Finance

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Journal of Systems Science & Complexity 2021年第4期34卷 1501-1521页

作者： CHAI Jian LEI Junchan SHI huiting ZHANG Xuejun LANG Meiling School of Economics and Management Xidian UniversityXi'an 710126China

Coal is essential to ensure China’s energy *** sudden or gradual change of coal price reflects the degree of disequilibrium or expected disequilibrium of coal supply and demand,which will not be conducive to energy ***,it is important to analyze the change points of coal price and explore the reason of the price *** paper analyses the coal price from January2008 to June 2019 as the perspective of the financial ***,the PPM-DBSCAN model is used to identify the mutation point of coal price ***,path analysis is used to extract the core driving factors that affect coal ***,the authors construct a time-varying and time-lag effect analysis model for structural changes of coal price based on the TVP-VAR *** results show that there are 11 mutation points of coal price *** market factors,coal supply and demand and alternative factors are the reasons of coal price *** authors find that the imbalance of coal supply and demand in traditional view cannot fully explain the fluctuation of coal *** impact of the financial market and non-thermal power generation have more influence on the coal price.

关键词： Coal price financial market mutation

Proton magnetic resonance spectroscopy in substance use disorder: recent advances and future clinical applications

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Science China(Information Sciences) 2020年第7期63卷 5-18页

作者： Tianzhen CHEN Haoye TAN huiting LEI Hang SU Min ZHAO Shanghai Mental Health Center School of Medicine Shanghai Jiao Tong University Shanghai Key Laboratory of Psychotic Disorders Institute of Psychological and Behavioral Science Shanghai Jiao Tong University CAS Center for Excellence in Brain Science and Intelligence Technology (CEBSIT) Chinese Academy of Sciences

Proton magnetic resonance spectroscopy(1H-MRS) now is widely used in clinical researches for the measurement of compounds or metabolites in vivo, especially in neuropsychiatric diseases/***, there are many studies on substance use disorders utilizing 1H-MRS to explore the mechanism of brain metabolites. It is found that metabolites levels in substance users are changed compared with healthy controls. Furthermore, these changes also relate to behavior indices, and provide evidence for the impact on neuronal health, energy metabolism and membrane turnover. However, 1H-MRS is not yet a mature detection technology, and it still has many challenges in the application of the neuropsychiatric disorder area. The settings of test parameters and the inconsistency of results across different studies still plague the clinicians and technicians. This article is intended to provide an overview of basic theory and methods of 1H-MRS, and the literature reporting metabolites alterations in substance dependence, as well as the related neuropsychological performance. At last, we will discuss the forthcoming challenges and possible future direction in this area.

关键词： proton magnetic resonance spectroscopy substance use disorders brain imaging neurometabolites

An Empirical Studyon the Impact of Corporate Social ResponsibilityInformation Disclosure on EquityCapital Cost

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学术界 2015年第11期 257-262页

作者： Meng Quansheng Zhao huiting College of Economics and Management Northwest A & F University

Taking public companies of Shenzhen A-share as samples,the paper analyses the impact of CSR disclosure on the cost of equity capital and the differences in various disclosure *** empirical results show that:the CSR disclosure has negative correlation with the cost of equity capital,and different ways of disclosure are not relative to the cost of equity *** social responsibility information disclosure plays a critical role in the company's management.

关键词：企业社会责任信息披露资本成本权益本影经营管理深圳市负相关

Cyclocarysaponins A–J,dammarane-type triterpenoid glycosides from the leaves of Cyclocarya paliurus

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Chinese Journal of Natural Medicines 2024年第10期22卷 955-964页

作者： XI huiting YUAN Mingming XIE Jianhua WANG Yuanxing State Key Laboratory of Food Science and Resources Nanchang UniversityNanchang 330047China Jiangxi Institute for Drug Control NMPA Key Laboratory of Quality Evaluation of Traditional Chinese Patent MedicineJiangxi Provincial Engineering Research Center of Drug and Medical Device QualityNanchang 330029China

Ten previously undescribed dammarane-type triterpenoid glycosides,cyclocarysaponins A–J(1–10),were isolated from the leaves of Cyclocarya paliurus(Batal.)*** structures of these compounds were characterized through detailed spectroscopic analysis,including 1D and 2D nuclear magnetic resonance(NMR)and high-resolution electrospray ionization mass spectrometry(HR-ESI-MS).The cytotoxic activities of all isolates were assessed against five human cancer cell lines(Bel-7402,Caski,BGC-823,A2780,and HCT-116).Of the tested compounds,compounds 1,7,and 9 exhibited selective cytotoxicity against one or more human cancer cell lines.

关键词： Cyclocarya paliurus Juglandaceae Triterpenoid glycosides Cyclocarysaponin Cytotoxic activities

Spatial distribution of polychlorinated biphenyls in soil around a municipal solid waste incinerator

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Journal of Environmental Sciences 2013年第8期25卷 1636-1642页

作者： Wenbin Liu Haifeng Li Zhenyu Tian huiting Xie Jicheng Hu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences

The impact of a typical municipal solid waste incinerator （MSWI） on polychlorinated biphenyl （PCB） concentrations in the surrounding soil was studied. Six stack gas samples were taken from the MSWI and 21 soil samples were collected from sampling sites between 300 and 1700 m from the MSWI stack. The total （∑PCB） concentrations of dioxin-like （dl） PCBs and indicator PCBs in the stack gas samples were between 3.41 and 34.3 ng/m3, and the corresponding toxic equivalents （TEQs） ranged from 4.45 to 66.9 pg WHO-TEQ/m3, with a mean of 28.6 pg WHO-TEQ/m3. A total of 2.43 g WHO-TEQ of PCBs per year was calculated to be released into the environment from MSWIs in China. The ∑PCB concentrations in the soil samples ranged from 28.0 to 264.4 pg/g, with mean and median values of 127.6 and 127.7 pg/g, respectively, while the TEQ values were between 0.020 and 0.18 pg WHO-TEQ/g, with mean and median values of 0.074 and 0.062 pg WHO-TEQ/g, respectively. Comparing this study with other studies performed around the world suggest that PCB emission from incinerators has a critical influence on PCB concentrations in the surrounding soil. An exponential function equation is proposed, which indicates a clear decline in ∑PCB concentrations with increasing distance from the stack. A contour map created using an ordinary kriging interpolation technique showed that a limited area （1250 m radius） from the stack was clearly influenced by PCB emission from the MSWI.

关键词： unintentional persistent organic pollutants stack gas contour map safe distance

Path loss of non-line-of-sight ultraviolet light communication channel in polydisperse aerosol systems

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Optoelectronics Letters 2022年第3期18卷 158-165页

作者： MA Yuzhao JIA huiting GAO Huiliang XIONG Xinglong Tianjin Key Laboratory for Advanced Signal Processing Civil Aviation University of ChinaTianjin 300300China College of Electronic Information and Automation Civil Aviation University of ChinaTianjin 300300China

Performance of non-line-of-sight(NLOS) ultraviolet(UV) communication is closely related with the system geometry, the communication range, and the atmospheric parameters. In this paper, we implement a full numerical analysis of the relations of path loss of NLOS UV communication with these factors using the Mie scattering theory and the Monte-Carlo method. In the numerical simulations, the actual polydisperse aerosol systems are used as the transmission medium. Since for the actual aerosol systems the atmosphere conditions may be similar within a short period, the path loss may be exclusively determined by the atmosphere visibility. Hence, we build a relation between the path loss of the communication channel and the atmosphere visibility. Simulation results reveal that for a relatively small communication range, the path loss increases with the visibility. On the other hand, low elevation of the transceiver may reduce the path loss. Our simulation results are useful for the evaluation of performance of the real NLOS UV communication systems.

关键词： communication channel scattering

The synthesis of fluorescent nanoclusters based on the etching reaction

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Nano Research 2024年第5期17卷 4631-4638页

作者： Hongbin Lin Yitao Cao Qiaofeng Yao Tiankai Chen huiting Shan Jianping Xie Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)and Key Laboratory of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Key Laboratory of Integrated Organic CircuitsMinistry of EducationDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China

Thiolate-protected atomically precise nanoclusters(NCs)demonstrate a series of unique luminescent characteristics attributed to their various peculiar electronic ***,fluorescent NCs present extraordinary practical values in biosensing and bioimaging research ***,restricted by the types of fluorescent NCs,there are great difficulties in promoting the development of NCs in fluorescent research *** a result,it is of significant necessity for researchers to develop new synthetic pathways to produce high-quality fluorescent *** to the analysis about the structural characteristics of fluorescent NCs,some general features like longer motif and higher ligand-to-metal ratio can be found,consistent to some presented regularities in etching ***,in this work,we used Au_(25)(MHA)_(18)(MHA=6-mercaptohexanoic acid)as a model nanocluster and utilized the etching reaction to systematically explore etching products and their corresponding luminescent ***,we also identified three main reaction processes in the entire etching reaction process,which can generate new metal nanocluster species with various fluorescent ***,the etching reaction will provide a good platform to produce new luminescent metal NC species.

关键词： etching reaction metal nanoclusters fluorescent properties fluorescent conversion