检索结果-南通市图书馆

High performance organic transistors and phototransistors based on diketopyrrolopyrrole-quaterthiophene copolymer thin films fabricated via low-concentration solution processing

引用

Chinese Chemical Letters 2018年第11期29卷 1675-1680页

作者： Pengcheng Gu Mengxiao hu Shang Ding Guangyao Zhao Yifan Yao Feng Liu Xiaotao Zhang huanli Dong Xiangke Wang Wenping hu Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry Capital Normal University Beijing 100048 China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) & Department of Chemistry School of Science Tianjin University Tianjin 300072 China College of Environmental Science and Engineering North China Electric Power University Beijing 102206 China Department of Physics &Astronautics Shonghai Jiao Tong University Shanghai 200240 China

Conjugated polymers have received considerable attentions over the past years due to their large-area potential applications via low-cost solution processing. Improving crystallinity of conjugated polymer molecules in solution-processed thin films is crucial for their efficient charge transport and thus high performance optoelectronic devices. Herein, with diketopyrrolopyrrole-quaterthiophene （PDQT） copo/ymer as an example, it is found that by simply reducing the solution concentration for spincoating meanwhile with the assistance of post-annealing, significantly enhanced film crystallinity with formation of typical single crystalline domains is obtained, which benefits from the enough space for better molecular assembly especially at the semiconductor/dielectric interface. High performance polymer transistors and phototransistors were finally constructed based on the optimal lowconcentration （2 mg/mL） spin-coated PDQT films （～12 nm）, which giving a high charge carrier mobility of 2.28 cm2 V-1 s-1 and a photoresponse on/off ratio of 2.1 ×107 at VG = 0 V under white light irradiation of 6mW/cm2. The results suggest that the bright future of PDQT crystalline films for large-area flexible integrated optoelectronic devices and the application of effective low-concentration processing approach in solution-processed organic electronics with reduced material waste.

关键词： Conjugated polymer Thin film Low-concentration processing Crystallinity Molecular orders Mobility Optoelectronic property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Flotation mechanism of octylic hydroxamic acid on diaspore

引用

Chinese Journal Of Geochemistry 2013年第2期32卷 191-194页

作者： LIU Sanjun QIN Wenqing PENG Tiefeng hu Yuehua School of Mineral Processing and Bioengineering Central South University School of Chemical Engineering The University of Queensland

Bauxite resources are widely spread in the earth. However, the effective utilization of this mineral is still under infant. The conventional collector for diaspore mineral is oleic acid. It has three main drawbacks which are highly insoluble, large dosages in bauxite flotation, and low selectivity, which hinder its application in industry. In this research, octylic hydroxamic acid was synthesized, and its collecting ability toward two major minerals in bauxite-diaspore and kaolinite was investigated. The collecting power of various reagents for diaspore are shown as follows: oleic acid

关键词：一水硬铝石异羟肟酸浮选机理辛酸铝土矿资源吸附能力硬水铝石电位测试

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bird guild loss and its determinants on subtropical land-bridge islands, China

引用

Chinese Birds 2015年第2期6卷 99-106页

作者： Zhifeng Ding Kenneth James Feeley huijian hu Ping Ding The Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education College of Life Sciences Zhejiang UniversityZijin’gang Campus Guangdong Entomological Institute & South China Institute of Endangered Animals Department of Biological Sciences Florida International University Center for Tropical Plant Conservation Fairchild Tropical Botanic Garden

Background: The guild concept is useful for understanding the community structure in a land-bridge island system,but most fragmentation studies have focused only on the importance of island area and isolation, other island attributes such as perimeter-area ratio(PAR) were overlooked or ***: We have adopted a guild approach to investigate the impacts of island attributes on bird guild richness on a set of 41 recently isolated land-bridge islands in the Thousand Island Lake(TIL), ***: We found insectivores had the largest number of species(34 species), fol owed by understory foraging guilds(28 species), omnivores(27 species) and canopy guilds(25 species). Furthermore, our data showed that migrants and residents responded equal y to island area, insectivores and understory guilds were sensitive to island area but omnivores and canopy guilds were not very sensitive. Most guild richness was determined by island area, except for omnivores and canopy ***: Although PAR or habitat diversity found to be important for bird species richness, our results highlight the importance of island area in maintaining bird diversity in fragmented island systems.

关键词： Bird guilds Island area Land-bridge islands PAR Thousand Island Lake z values

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CYP17A1基因突变致先天性肾上腺皮质增生症一例报道并文献复习

引用

中国全科医学 2025年第6期28卷 771-776页

作者：戴遥薛丽萍章诗琪许敏章秋胡红琳安徽医科大学第一附属医院内分泌代谢科安徽省合肥市2320000

17α-羟化酶缺乏症(17-OHD)是先天性肾上腺皮质增生症(CAH)中的一种罕见类型,约占CAH的1%,其患病率为1∶50000。本文报道了1例疑似17-OHD患者,通过外显子测序鉴定了1个类固醇生成酶基因CYP17A1的基因突变,结合临床表现、体格检查、肾上... 详细信息

17α-羟化酶缺乏症(17-OHD)是先天性肾上腺皮质增生症(CAH)中的一种罕见类型,约占CAH的1%,其患病率为1∶50000。本文报道了1例疑似17-OHD患者,通过外显子测序鉴定了1个类固醇生成酶基因CYP17A1的基因突变,结合临床表现、体格检查、肾上腺和性腺功能检查等,最终将其明确诊断为CAH并给予规范治疗。故结合该病例,本文回顾总结了17-OHD的鉴别和诊断,以期提高临床对该病的认识,促进临床对17-OHD的规范诊治,为17-OHD的诊断和治疗提供更多的参考资料。

关键词：肾上腺皮质疾病先天性肾上腺皮质增生症 17α-羟化酶缺陷症基因诊断 CYP17A1基因

来源：

维普期刊数据库

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

Novel spectrum sensing and access in cognitive radio networks

引用

Science China(Information Sciences) 2018年第8期61卷 228-230页

作者： Shibing ZHANG Yingdong hu Li ZHANG Zhihua BAO School of Electronics and Information Nantong University Nantong Research Institute for Advanced Communication Technologies

Dear editor,The throughput,delay and collision probability between the primary users(PUs)and secondary users(SUs)have been considered as the main performance measures in cognitive radio(CR)networks[1].The longer the s... 详细信息

关键词： net Novel spectrum sensing and access in cognitive radio networks CR

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A new optical field state as an output of diffusion channel when the input being number state

引用

Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1649-1653页

作者： FAN HongYi LOU SenYue PAN XiaoYin hu LiYun Department of Physics Ningbo University Department of physics Jiangxi Normal University

By analyzing theoretical scheme of quantum controlling through photon addition,we propose a new optical field whose density operator asρ=λ(1-λ)l:Ll(-λ2aa/1-λ)e-λaa:(here::denotes normal ordering symbol),which is named Laguerre-polynomialweighted chaotic *** show that such state is the solution to the master equation d/dtρ=-κ(aaρ+ρaa-aρa-aρa),describing a diffusion channel,with the initial number state|l l|,andλ=1/(1+κt).This new state is characteristic of possessing photon number l+κt at time t,so the photon number by adjusting the diffusion parameterκcan be *** master equation is solved using the summation method within ordered product of operators and the entangled state *** physical difference between the diffusion and the amplitude damping is noted.

关键词： photon addition Laguerre-polynomial-weighted chaotic state entangled state representation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of ventilation performance and energy efficiency of greenhouse fans

引用

International Journal of Agricultural and Biological Engineering 2015年第1期8卷 103-110页

作者： Zhang Zhi Richard S Gates Zou Zhirong hu Xiaohui College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100China Department of Agriculture and Biological Engineering University of Illinois at Urbana-Champaign61801USA College of Horticulture Northwest A&F UniversityYangling 712100China

In order to investigate fan performance in fan-ventilated greenhouses(Urbana,USA),the effects of guard screen and loose belts on fan ventilation airflow and power consumption in greenhouse operations were examined with four belt-driven fans as trial *** Fans Assessment Numeration System was used to measure the airflow ***,relative humidity and power consumption were also *** show there were significant differences in the airflow rate between the fans with a cleaned and uncleaned guard screen(P<0.05).Power consumption also differed significantly even with the same cooling effect in *** fan belts were adjusted to the proper tension,the fan speed and airflow rate were 13.1% and 30.1% higher than those of original belts,*** daily average power consumption for the fan with the original loose belts was 20.4% higher than that with the adjusted belts when the pad was not working and 24.2% higher with pad *** ventilation performance of fans with identical specifications showed a variation by up to 13.0% in terms of the ventilating efficiency *** results demonstrated that fans should be cleaned routinely,and belt tension should be checked to ensure that fan performance meets *** can reduce the power consumption in greenhouses for environmental ***,reordering fan staging,so that the most efficient fans are used in areas of greatest demand,can also reduce ventilation energy costs.

关键词： greenhouse fan performance airflow rate power consumption efficiency ratio

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Vinylpyridine-and vinylnitrobenzene-coating tetraphenylethenes：Aggregation-induced emission (AIE) behavior and mechanochromic property

引用

Chinese Chemical Letters 2018年第10期29卷 1489-1492页

作者： Xiaoxie Ma Linli hu Xie Han Jun Yin College of Chemistry and Environmental Engineering Yangtze University Jingzhou 434023 China Key Laboratory of Pesticide and Chemical Biology Ministry of Education College of Chemistry Central China Normal University Wuhan 430079 China

Two functional tetraphenylethylene derivatives modified by vinylpyridine and vinylnitrobenzene,respectively, were synthesized by Heck coupling reaction. Their optical behaviors were investigated. The results showed they had AIE activity in solution. The property in solid state displayed that both of them had reversible mechanochromism. Upon grinding, their fluorescence spectra showed around 13–40nm red-shift, and could return to the original state after solvent fuming. We believe that this work will be helpful for the design of stimuli-responsive materials in future.

关键词： Aggregation-induced emission Mechanochromism Tetraphenylethylene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The construction of Markov processes in random environments and the equivalence theorems

引用

Science China Mathematics 2004年第4期47卷 481-496页

作者： hu DiheSchool of Mathematics and Statistics, Wuhan University, Wuhan 430072, China 1. School of Mathematics and Statistics Wuhan University 430072 Wuhan China

In sec.1, we introduce several basic concepts such as random transition function, p-m process and Markov process in random environment and give some examples to construct a random transition function from a non-homogeneous density function. In sec.2, we construct the Markov process in random enviromment and skew product Markov process by p - m process and investigate the properties of Markov process in random environment and the original process and environment process and skew product process. In sec. 3, we give several equivalence theorems on Markov process in random environment.

关键词： radom transition function, p -m process, Markov process in random environment, skew product Markov process, density function.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Predictive safety control for road vehicles after a tire blowout

引用

Science China(Information Sciences) 2018年第7期61卷 101-103页

作者： Fei WANG Hong CHEN Lulu GUO Yunfeng hu State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University

Since driver error is considered a major cause in over 90%of all road crashes[1],driving assistance systems are widely used to improve driving safety,and are an important research direction in the intelligent vehicle *** the rapid development of sensing,identification and communication technologies,the vehicle can obtain an increasing amount of information in real time,ranging from the vehicle status information to road information

关键词： Predictive safety control for road vehicles after a tire blowout

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：