检索结果-南通市图书馆

The effect of end-capping groups in A-D-A type non-fullerene acceptors on device performance of organic solar cells

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2017年第11期60卷 1458-1467页

作者： Jianchao Jia Nannan Zheng Zhenfeng Wang yunping huang Chunhui Duan Fei huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

A series of novel wide bandgap small molecules(IFT-ECA, IFT-M, IFT-TH and IFT-IC) based on the A-D-A structure with indenofluorene core, thiophene bridge, and different electron-deficient end-capping groups, were synthesized and used as non-fullerene acceptors in organic solar cells. The influences of end-capping groups on the device performance were *** four materials exhibited different physical and chemical properties due to the variation of end-capping groups, which further affect the exciton dissociation, charge transport, morphology of the bulk-heterojunction films and device performance. Among them, IFT-IC-based device delivered the best power conversion efficiency of 7.16% due to proper nano-scale phase separation morphology and high electron mobility, while the devices based on the other acceptors achieved lower device performance(4.14% for IFT-TH, <1% for IFT-ECA and IFT-M). Our results indicate the importance of choosing suitable electron-withdrawing groups to construct high-performance non-fullerene acceptors based on A-D-A motif.

关键词： organic solar cells bulk-heterojunction non-fullerene acceptors end-capping groups

Design, synthesis and photovoltaic properties of a series of new acceptor-pended conjugated polymers

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2016年第12期59卷 1583-1592页

作者： Zhihong Wu Yongxiang Zhu Wei Li yunping huang Junwu Chen Chunhui Duan Fei huang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

A series of novel acceptor-pended conjugated polymers featuring a newly developed carbazole-derived unit are designed and synthesized. The relationships between chemical structure and optoelectronic properties of the polymers are systematically in-vestigated. The control of UV-Vis absorption spectra and energy levels in resulting polymers are achieved by introducing suitable pended acceptor units. The photovoltaic properties of the resulting polymers are evaluated by blending the polymers with （6,6）-phenyl-CTFbutyric acid methyl ester. The resulting solar cells exhibit moderate performances with high open-circuit voltage. Charge transport properties and morphology were investigated to understand the performance of corresponding solar cells.

关键词： acceptor.pended conjugated polymers polymer solar cells band gap energy level

南瓜类胡萝卜素高通量提取检测体系建立及应用

在线全文

学校读者我要写书评

暂无评论

农学学报 2024年第3期14卷 21-27页

作者：宋慧安学君黄芸萍张香琴宁波市农业科学研究院浙江宁波345040

为了建立南瓜类胡萝卜素高通量提取检测体系,以南瓜果肉为试材,通过单因素试验和L27(313)正交试验,确定和优化南瓜类胡萝卜素提取的最佳提取液、提取温度和料液比。结果表明,乙醇是提取南瓜类胡萝卜素的最佳提取液,在55℃条件下,以料液... 详细信息

为了建立南瓜类胡萝卜素高通量提取检测体系,以南瓜果肉为试材,通过单因素试验和L27(313)正交试验,确定和优化南瓜类胡萝卜素提取的最佳提取液、提取温度和料液比。结果表明,乙醇是提取南瓜类胡萝卜素的最佳提取液,在55℃条件下,以料液比1:28,浸提90 min,类胡萝卜素的得率显著高[(7.56±0.14) mg/100 g]。在南瓜类胡萝卜素的提取条件中,提取温度对提取效果影响最大,料液比×提取时间和提取时间×温度的互作次之。利用高通量提取检测体系比较分析23份不同类型南瓜材料类胡萝卜素含量,发现印度南瓜‘贝栗4号’和中国南瓜×印度南瓜远缘杂种自交系20F8的类胡萝卜素含量分别为(31.40±0.35) mg/100g和(24.72±0.72) mg/100 g,显著高于其他供试南瓜材料,具有显著的营养利用价值。试验获得的南瓜类葫芦卜素高效检测体系,省事省力,结果准确,可提高南瓜营养品质育种效率。

关键词：南瓜类胡萝卜素高通量测定远缘杂交营养品质育种

Carbon and nitrogen stable isotope analyses of mammal bone fossils from the Zhongba site in the Three Gorges Reservoir region of the Yangtze River,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第2期56卷 169-178页

作者： TIAN XiaoSi ZHU Cheng SUN ZhiBin SHUI Tao huang yunping FLAD Rowan Kimon LI YuMei The Department of History of Nanjing University Nanjing 210093 China Department of Tourism of Chizhou College Chizhou 247100 China School of Geographic and Oceanographic Sciences of Nanjing University Nanjing 210093 China Institute of Cultural Relics and Archaeology Chengdu 610041 China Faculty of Archaeology and Museology Peking University Beijing 100871 China Department of Anthropology Peabody Museum Harvard University Cambridge MA 02138 USA Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on AMS 14 C dating data,carbon and nitrogen isotope analyses were conducted on mammal bone collagen of deer,cattle and pigs from the Zhongba site in the Three Gorges Reservoir region of the Yangtze *** analyses were conducted to reconstruct palaeodiets of mammals,palaeoecology,palaeoenviroment and previous human activities in the study *** show that the collagen loss of bone did not change the in vivo isotopic composition of carbon and nitrogen stable isotopes,and most of the bone fossils were well *** bone collagen of samples from deer had a mean δ 13 C of-23.1‰ and a mean δ 15 N of 4.7‰,suggesting that deer subsisted in a closed habitat and fed on branches and *** bone collagen of cattle had a mean δ 13 C of-19.6‰ and a mean δ 15 N of 5.2‰,which indicates that cattle subsisted in an open habitat and fed on grasses and *** δ 13 C values show that both deer and cattle fed on C 3 plants and lived in the same ecosystem,but the t-test results show that deer δ 13 C and δ 15 N values were both more negative than those of cattle,indicating that they inhabited different *** δ 13 C and δ 15 N values of cattle partially overlapped those of deer,suggesting some competition in diets between *** t-tests show that the δ 13 C and δ 15 N values of pigs were more positive than those of cattle and deer,which signifies that pigs occupied a higher trophic level compared to cattle and *** wide range of pig δ 13 C values demonstrates that pig trading had been taking place from early Neolithic Age to late Bronze *** were no significant differences in deer δ 13 C and δ 15 N values among different archaeological periods,making it clear that climatic,ecological and environmental conditions were kept relatively stable from 2200 to 4200 a *** stability may have been responsible for the extensive and complete cultural layers at the Zhongba *** minimum number of samples required to estimate the mean δ 13 C values of d

关键词：碳稳定同位素长江中下游地区中坝遗址哺乳动物三峡库区动物骨骼化石中国地区氮

不同采收期及后熟期对野生西瓜种子质量的影响

在线全文

学校读者我要写书评

暂无评论

中国果菜 2024年第1期44卷 26-29页

作者：古斌权严蕾艳黄芸萍王毓洪宁波市农业科学研究院浙江宁波315040

为解决野生西瓜制种时间较长的问题,以野生西瓜砧木‘野壮101’为材料,通过研究果实不同发育时间及种子后熟时间的发芽率等种子质量相关性状,分析采收期及后熟期对野生西瓜砧木种子质量的影响。结果表明,果实采收期及后熟时间均影响种... 详细信息

为解决野生西瓜制种时间较长的问题,以野生西瓜砧木‘野壮101’为材料,通过研究果实不同发育时间及种子后熟时间的发芽率等种子质量相关性状,分析采收期及后熟期对野生西瓜砧木种子质量的影响。结果表明,果实采收期及后熟时间均影响种子质量及外观。当果实发育60 d、果实采收后种子后熟10 d时,野生西瓜砧木种子发芽率、发芽势、千粒质量均最高,分别为92%、90%、252 g。

关键词：种子质量发芽率发芽势千粒质量种皮颜色

维普期刊数据库博看期刊

Diets, eco-environments and seasonal variations recorded in the oxygen and carbon isotopic compositions of mammal tooth enamel from the Shunshanji site,Sihong County,Jiangsu Province,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第30期58卷 3788-3795页

作者： TIAN XiaoSi ZHU Cheng SHUI Tao huang yunping The Department of History of Nanjing University Chizhou College School of Geographic and Oceanographic Sciences of Nanjing University Faculty of Archaeology and Museology Peking University

The carbon and oxygen isotopic compositions of the tooth enamel of mammals,including deer,wild pigs,buffaloes and domesticated pigs from the Shunshanji site,Sihong County,Jiangsu Province,China,were analyzed to reconstruct the mammals’ecoenvironments and diets,and to evaluate seasonal variations in the study *** isotopic compositions of buck samples revealed that the deer ate completely C3 plants and the environments they inhabited were relatively open and that wild pigs ate primarily C3 *** isotopic compositions indicated that the body sources of these two mammals were different,*** deer and pigs lived in different niches within a relatively similar *** domesticated pigs were isotopically more positive than the ancient wild pigs in carbon 13C values,suggesting the former ingested more C3 plants relative to the *** the 18O data showed modern domesticated and ancient pigs had similar oxygen isotope compositions,their water sources were *** carbon and oxygen isotopic patterns of premolar microsamples of ancient and modern buffaloes indicated that the plants ingested by the ancient buffalo varied with seasonal shifts,but plants ingested by the modern buffalo were relatively *** eco-environment of the modern buffalo was more open,warmer and drier than eco-environment of the ancient buffalo,which may be the result of the deforestation and other human *** and modern seasonal changes were clearly recorded in the isotopic patterns and the seasonal variation amplitudes of the ancient and modern eco-environments were similar.

关键词：碳同位素组成氧同位素组成生态环境哺乳动物季节变化泗洪县江苏省饮食

Delineation of urban growth boundary based on FLUS model under the perspective of land use evaluation in hilly mountainous areas

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第5期21卷 1647-1662页

作者： ZHANG yunping LIN Jianping huang Yimin CHEN Zebin ZHU Chenhui YUAN Hao School of Geography and Environmental Engineering Gannan Normal UniversityGanzhou 341000China Key Laboratory of Low Carbon Recycling Technology for Municipal Solid Waste in Jiangxi Province Ganzhou 341000China

With rapid economic development,the size of urban land in China is expanding *** Urban Growth Boundary(UGB)is an expandable spatial boundary for urban construction in a certain period in order to control the urban *** delineation of UGB can inhibit the disorderly spread of urban space and guide the normal development of the *** is of practical significance for the construction of green urban *** study utilizes GIS technology to establish a land construction suitability evaluation system for Nankang city,which is experiencing rapid urban expansion,and outlines the preliminary UGB under the future land use simulation(FLUS)*** the same time,considering the coupled coordination of"Production-Living-Ecological Space",and based on the suitability evaluation,we revised the preliminary UGB by combining the advantages of the patch-generating land use simulation(PLUS)model and the convex hull model to delineate the final *** results show that:1)the comprehensive score of the evaluation of the suitability of the construction of land from high to low shows the distribution of the center of the city to the surrounding circle type spread,the center of the city has the highest suitability *** results of convex hull model show that the urban expansion type of Nankang is *** the future,the urban expansion will mainly occur in the northern part of the *** PLUS model predicts an increase of 3359.97 hm^(2)of construction land in Nankang by 2035,of which 2022.97 hm^(2)is urban construction land.2)The FLUS model has a prediction accuracy of 86.3%and delineates a preliminary UGB area of 9215.07 hm^(2).3)We used the results of the construction suitability evaluation,PLUS model simulation results,and convex hull model predictions to revise the originally delineated *** final delineated UGB area is 8895.67 hm^(2)and it is capable of meeting the future development of the study *** results of the delineation can promote

关键词： Urban sprawl FLUS model Spatial correction Urban growth boundary Sustainable development

Animal diversities and characteristics of environmental change revealed by skeletons unearthed at Zhongba Site of Chongqing City,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2008年第S1期53卷 74-86页

作者： ZHU Cheng MA ChunMei OUYANG Jie LI ZhongXuan YIN Qian SUN ZhiBin huang yunping R.K.FLAD LI Lan LI YuMei School of Geographic and Oceanographic Sciences of Nanjing University Nanjing 210093China Cultural Relic and Archaeology Research Institute of Sichuan Province Chengdu 610041China Faculty of Archaeology and Museology Peking UniversityBeijing 100871China Department of Anthropology Peabody MuseumHarvard UniversityCambridgeMA 02138USA Graduate University of Chinese Academy of Sciences Beijing 100049China

Nearly 200000 animal skeletons are unearthed in the Unit T0202 from Zhongba Site of Zhongxian *** to the analysis of 129165 specimens,these skeletons may be classified into 5 kinds, namely,Mammalia,Osteichthys,Aves,Amphibian and Reptilia,which belong to 13 orders,28 families and 42 *** this paper,based on archeological dating and AMS 14 C data,through statistically analyzing the unearthed skeletons and studying the change of the smallest individual numbers,these research results detected the following:1)In almost all the time of 2370―200 BC,in Zhongba region, some animals distributed widely,such as Muntiacus sp,Elaphodus cephalophus and Muntiacus sp. inhabiting in glade and grassland,Scrofa *** Canis familiaris raised by the ancient people,rodentia rabbit and Rattus rattus,which suggested that a fairly good ecological environment of forest and grassland was preserved at that period and the predecessors began to raise domestic animals from 1750 to 1000 BC,which has lasted until today.2)Rhinoceros only lived during 2000―1750 BC,1000― 700 BC and 700―500 BC,which indicates that the ecological environment of grassland and wetland might be better in these phases.3)Macaca *** Ursus arctos appeared only after 1750―1000 BC, which may show that the forest condition is better for animals to live during 1750―200 BC.4)The smallest individual numbers of Bublus sp.,bos *** otters emerged during about 2370―1750 BC, which perhaps infers that water area during the early period was wider than that of the late period.5) Since skeletons of rhinoceros are discovered in strata of Zhongba Site during 2000―1750 BC and 1000―500 BC,according to the climate and ecology environment which rhinoceros live in now,the average annual temperature and precipitation during 2000―1750 BC and 1000―500 BC are supposed to be probably higher than that of *** Zhu Kezhen considered that the first low temperature period in the past 5000 years of China was between 1100 BC a

关键词： Zhongba Site animal skeletons animal diversity climate and ecological environment change 2370 BC—200 BC

Two-Stage Optimal Scheduling of Community Integrated Energy System

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2024年第2期121卷 405-424页

作者： Ming Li Rifucairen Fu Tuerhong Yaxiaer yunping Zheng Abiao huang Ronghui Liu Shunfu Lin New Power System Technology Research Institute The Electric Power Research Institute of State Grid Xinjiang Electric Power Co.Ltd.Urumqi830000China The College of Electrical Engineering Shanghai University of Electric PowerShanghai200090China

From the perspective of a community energy operator,a two-stage optimal scheduling model of a community integrated energy system is proposed by integrating information on controllable *** day-ahead scheduling analyzes whether various controllable loads participate in the optimization and investigates the impact of their responses on the operating economy of the community integrated energy system(IES)before and after;the intra-day scheduling proposes a two-stage rolling optimization model based on the day-ahead scheduling scheme,taking into account the fluctuation of wind turbine output and load within a short period of time and according to the different response rates of heat and cooling power,and solves the adjusted output of each controllable *** simulation results show that the optimal scheduling of controllable loads effectively reduces the comprehensive operating costs of community IES;the two-stage optimal scheduling model can meet the energy demand of customers while effectively and timely suppressing the random fluctuations on both sides of the source and load during the intra-day stage,realizing the economic and smooth operation of IES.

关键词： Integrated energy system two-stage optimal scheduling controllable loads rolling optimization