检索结果-南通市图书馆

Ternary organic solar cells offer 14% power conversion efficiency

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第23期62卷 1562-1564页

作者： zuo xiao Xue Jia Liming Ding Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and TechnologyBeijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Organic solar cells （OSCs） have advantages like light-weight, flexibility, colorfulness and solution processability [1 ]. The active layer of OSCs generally contains two organic semiconductors： an electron donor and an electron acceptor. The donor and acceptor make nanoscale phase separation to allow efficient exciton dissociation and also form a three-dimensional （3D） passage to rapidly transfer free charge carriers to respective electrodes.

关键词： Ternary organic solar cells power conversion efficiency

Hour-to-hour variability of the ionosphere: An application of the classical multidimensional scaling method

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2015年第7期58卷 1243-1250页

作者： SHI Hao ZHANG DongHe HAO YongQiang xiao zuo Department of Geophysics Peking University

The classical multidimensional scaling(MDS) method is introduced and applied in the study of the hour-to-hour ionospheric variability based on the ionospheric fo F2 observed at three ionosonde stations in East-Asia in 2002 and 2007. Results from the matrix eigen decompositions indicate that the annual part of the ionospheric variation is large in middle latitude and solar maximum period(2002) while low in the low latitude and solar minimum period(2007). The connectivity maps of the hour-to-hour ionospheric variability based on MDS method show some common diurnal features. The ionospheric connectivity between adjacent hours near noon hours and near midnight hours is high. The ionospheric connectivity between adjacent hours near sunrise hours and near sunset hours is poor, especially for the sunrise hours. Also there are latitudinal and solar activity dependences in this kind of connectivity. These results revealed from the ionospheric connectivity maps are useful physically and in practice for the ionospheric forecasting on the hour-to-hour scale.

关键词： ionospheric variability classical multidimensional scaling connectivity map

A theoretical analysis of global characteristics of spread-F

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第19期46卷 1593-1595页

作者： zuo xiao Tianhua Zhang Peking Univ Dept Geophys Beijing 100871 Peoples R China

Spread-F is an important ionosphere pheonome-non and it has much effect on radio wave propogation. Taking magnetic inclination and declination into consideration, a theoretical model is deduced for the linear growth-rate of spread-F. It is a generalization of the earlier equatorial model and a relatively complete description o f the spread-F pheonomenon. This theory shows that the magnetic configuration, i.e. the magnetic strength, inclination and declination, affects the occurrence rate greatly, which forms some regional distribution characteristics of the spread-F.

关键词： spread-F irregularities global characteristics.

Study of the ionospheric TEC using GPS during the large solar flare burst on Nov. 6,1997

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2000年第19期45卷 1749-1752页

作者： Donghe Zhang zuo xiao Peking Univ Dept Geophys Beijing 100871 Peoples R China

Using the data from 15 global positioning system (GPS) stations scattered between 28° N-45° N and 90° W- 77° E we obtained the total electron content (TEC) variations with time during a large solar flare. The results indicated that the flare makes the TEC of ionosphere increasing in a large spatial area. The amounts of the TEC enhancement are mainly determined by the local time of subionospheric point, and the largest TEC enhancement is about 2.5 TECU. It is also concluded that the TEC enhancement is not symmetrical about the local noon time, the TEC enhancement values during morning hours are larger than those of the afternoon hours.

关键词： total electron content (TEC) flare subionospheric point.

Self-healing Polymeric Hydrogels:Toward Multifunctional Soft Smart Materials

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2021年第10期39卷 1262-1280,I0006页

作者： xiao-Ling zuo Shao-Fan Wang xiao-Xia Le Wei Lu Tao Chen College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The concept of self-healing that involves a built-in ability to heal in response to damage wherever and whenever it occurs in a material,analogous to the healing process in living organisms,has emerged a couple of decades *** primarily by the demands for life-like materials and soft smart materials,therefore,the development of self-healing polymeric hydrogels has continually attracted the attention of the scientific ***,this review is intended to give an in-depth overview of the state-of-the-art advances in the field of self-healing polymeric ***,recently emerging trends in self-healing polymeric hydrogels are summarized,and notably,recommendations to endow these hydrogels with fascinating multi-functionalities including luminescence,conductivity/magnetism and shape memory etc are *** close,the current challenges and future opportunities in this field are also discussed.

关键词： Polymeric hydrogels Self-healing Multi-functionalities Smart materials

Thermostable single-junction organic solar cells with a power conversion efficiency of 14.62%

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2018年第6期63卷 340-342页

作者： Hui Li zuo xiao Liming Ding Jizheng Wang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and Technology

Organic solar cells(OSCs)have drawn substantial attention in recent two decades due to their features of solution processability,low cost,and light weight[1].The active layer of OSCs is usually composed of an electron donor(D)and an electron acceptor(A).The D/A system can form interpenetrated nanoscale network,which allows efficient exciton dissociation and hence charge carrier ***,the efficiency of such binary OSCs is gen-

关键词：太阳能电池变换效率器官连接材料发展低费用振荡轻重量

STUDY ON THE INTERACTION BETWEEN POLYVINYLPYRROLIDONE AND PLATINUM METALS DURING THE FORMATION OF THE COLLOIDAL METAL NANOPARTICLES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2008年第1期26卷 23-29页

作者： Tu, Wei-xia zuo, xiao-bin Liu, Han-fan Beijing Inst Chem Technol Minist Educ Key Lab Nanomat Div Mol & Mat Simulat Beijing 100029 Peoples R China Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China

Several PVP-stabilized colloidal platinum metals nanoparticles have been synthesized and characterized by FTIR and *** with the pure PVP,carbonyl groups of PVP in the mixture of PVP and the metal precursors or in the PVP-stabilized metal nanoparticles have obvious peak shifts in FTIR *** peak shifts reveal the interaction between PVP and the metal *** interaction between PVP and metal precursors has effect on the formation of the colloidal metal *** of the intera...

关键词： Colloidal metal nanoparticles Metal precursor PVP Interaction

5H-dithieno[3,2-b:20,30-d]pyran-5-one unit yields efficient wide-bandgap polymer donors

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2019年第22期64卷 1655-1657页

作者： Jinfeng Liu Ling Liu Chuantian zuo zuo xiao Yingping Zou Zhiwen Jin Liming Ding College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China CSIRO Manufacturing Bag 10Clayton SouthVictoria 3169Australia School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China

Recently,great progress has been made in organic solar cells due to the emergence of high-performance nonfullerene acceptors[1-6].Over 16%and 17%power conversion efficiencies(PCEs)were achieved for nonfullerene-acceptor-based single-junction and tandem cells,respectively[7,8].Owing to complementary light absorption,wide-bandgap donor-acceptor(D-A)copolymers are ideal electron-donating partners for nonfullerene ***,efficient D-A copolymer donors are still limited.

关键词： acceptor donor complementary

Left ventricle energy loss in normo-and hypertensive subjects

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2020年第6期17卷 344-350页

作者： xiao-Wen zuo Hua-Ping JIA xiao ZHOU Yang MU Guang ZHI Medical School of Chinese PLA BeijingChina Department of Ultrasound Medicine PLA Strategic Support Force Characteristic Medical CenterBeijingChina Department of Cardiology the First Medical Center of Chinese PLA General HospitalBeijingChina

Background Vector flow mapping is a novel echocardiographic technique that enables the visualization of the intraventricular flow. We aimed to evaluate and compare the index of hemodynamic dissipative energy loss in patients with hypertension and the ones with normotensive, unaffected control subjects. Methods & Results Transthoracic echocardiography was performed in eighty-nine hypertensive patients with preserved left ventricular ejection fraction, fifty-one hypertensive patients with left ventricular hypertrophy(LVH group) and thirty-eight hypertensive patients without LVH(non-LVH group). Forty-two healthy volunteers were enrolled as the control group. The stored images were analyzed to calculate the energy loss. The average energy loss of diastole in the LVH group was significantly increased(controls vs. non-LVH vs. LVH: 7.07 ± 0.91 vs. 12.44 ± 3.14 vs. 16.29 ± 3.17 J/s per m^3). Compared with the control group, the energy loss was significantly increased in the LVH group during the different periods in diastole. The energy loss in the non-LVH group was the greatest among the three groups during the atrial contraction period. Conclusions Energy loss provides a promising method for evaluating the energy efficiency in the left ventricle and may be a new indicator of left ventricular cardiac dysfunction.

关键词： Echocardiography Energy loss Hypertension Vector flow mapping