检索结果-南通市图书馆

航空动力学报 1988年第2期 109-112页

作者：晏砺堂张世平李其汉赵福安北京航空学院

本文通过理论计算和实验,研究了带定心弹性支承的挤压油膜阻尼器刚性转子的双稳态特性。采用阻尼器轴颈偏心率、传递率和落后相位角的变化表示这种特性。

关键词：挤压油膜阻尼器弹性支承双稳态转子动力特性刚性转子稳态特性静态特性

粘胶基碳纤维连续式电化学氧化表面处理(1)——碳纤维表面的物理化学性能

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

玻璃钢／复合材料 2000年第1期 23-27页

作者：余木火赵世平滕翠青韩克清余奇平顾丽霞中国纺织大学材料科学与工程学院上海200051

本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面 ,并测定了处理后碳纤维的单丝强度、表面浸润性、表面活性官能团含量及表面形貌等表面物理化学性能。结果表明 :粘胶基碳纤维经电化学氧化表面处理可以有效地在表面产生活性官能... 详细信息

本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面 ,并测定了处理后碳纤维的单丝强度、表面浸润性、表面活性官能团含量及表面形貌等表面物理化学性能。结果表明 :粘胶基碳纤维经电化学氧化表面处理可以有效地在表面产生活性官能团和提高表面粗糙度 ,从而有效地提高表面润湿性 ,但经处理后单丝强度较易下降 ,因此需精确控制处理的条件。

关键词：粘胶基碳纤维电化学氧化处理碳纤维物理化学

在线全文

学校读者我要写书评

暂无评论

基于***和C#的下一代Internet网络设计

武汉化工学院学报 2004年第2期26卷 56-58页

作者：杨帆赵世平武汉化工学院电气信息学院湖北武汉430073 武汉化工学院计算机科学与工程学院湖北武汉430073

首先用 Frontpage和 Dreamweaver等网页制作工具为后勤服务总公司设计了一个网页 ,然后 ,用 C#语言在 Visual ***平台上为网络编辑了新闻发布和留言板等动态网页 .该网络具有了下一代 Inter-net网络的特点。

关键词：下一代Internet网络 C#语言 VisualStudioNET平台

Rice MtN3/saliva/SWEET gene family: Evolution,expression profiling, and sugar transport

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2014年第6期56卷 559-570页

作者： Meng Yuan Junwei zhao Renyan Huang Xianghua Li Jinghua Xiao shiping Wang National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University

The rice MtN3/saliva/SWEET gene family consists of 21 paralogs. However, their functions in physiological processes are largely unknown, although at least three of the 21 paralogs are used by pathogenic bacteria to infect rice. Here, we report the evolutionary features, transcriptional characteristics, and putative functions in sugar transport of this gene family. The wild rice accessions in this study included those with AA, BB, CC, BBCC, CCDD, EE, and GG genomes, which appeared approximately 0.58-14.6 million years ago. The structures, chromosomal locations, phylogenetic relationships, and homologous distribution among the accessions suggest that the number of rice MtN3/saliva/SWEET paralogs gradual y increased as the Oryza genus evolved, and one third of the paralogs may have originated recently. These paralogs are differentially expressed in vegetative and reproductive tissues, in the leaf senescence process, and in signaling dependent on gibberel ic acid, cytokinin, or 1-naphthalene acetic acid （an analog of auxin）, suggesting that they may be associated with multiple physiological processes. Four paralogs could transport galactose in yeast, which suggests that they may have a similar function in rice. These results will help to elucidate their roles and biochemical functions in rice development, adaptation to environment, host-pathogen interaction, and so forth.

关键词： Evolution MtN3/saliva domain Oryza sotivo transporter

Light-harvesting Polymer Based DNA Assay for SNP Identification of BRCA1 Mutations

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2006年第A3期35卷 274-276页

作者： Jiang Li Xingfen Liu Hui Xu shiping Song Yun zhao Chunhai Fan School of Life Science Sichuan University Chengdu China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai China

We report an improved strategy for conjugated polymer-based optical DNA detection with stem-loop structured DNA *** high sensitivity of conjugated polymer-based biosensors arises from light harvesting by the conjugated polymer and the related amplified fluorescent signal transduction either through quenching or through Fǒrster energy transfer) In our previous publication,we demonstrated that the coupling of magnetic particles to conjugated polymers significantly improves the selectivity of this class of DNA *** we further improved the selectivity by introducing both stem-loop structured capture probe and competition *** demonstrated further that this improved magnetically assisted DNA sensor can conveniently identify even a single-nucleotide mismatch in the target sequence.

关键词： conjugated polymers DNA detection BRCA1 SNF identification

Study on traveling magnetic field casting of sheet components

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

China Foundry 2010年第3期7卷 259-264页

作者： Su Yanqing Xu Yanjin zhao Lei Zhang Tiejun Wu shiping Guo Jingjie School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The distribution of a magnetic field over an inductor used for sheet castings has been investigated *** an increase in height from the surface, the magnetic field density decreases according to the exponential *** the transverse direction, the magnetic field density is approximately uniform except near the *** magnetic field density is direct proportional to the number of turns multiplied by the current in ***-magnetic material in the upper mould can enhance the magnetic field *** the electromagnetic force, the mould-filling process of sheet casings has been studied by physical simulation *** difference in filling capability between gravity casting and travelling magnetic field casting has been *** electromagnetic force can enhance the filling process, but it also brings a *** an increase in the magnetic field density, the surface quality of the aluminum alloy sheet castings becomes *** reason is discussed.

关键词： traveling magnetic field casting magnetic field density mould filling process sheet castings

Green-emissive carbon quantum dots with high fluorescence quantum yield:Preparation and cell imaging

在线全文

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2021年第2期15卷 253-265页

作者： Yingying WEI Lin CHEN Shaoban zhao Xuguang LIU Yongzhen YANG Jinglei DU Qiang LI shiping YU The Institute of New Carbon Materials Taiyuan University of TechnologyJinzhong 030600China Key Laboratory of Interface Science and Engineering in Advanced Materials(Ministry of Education) Taiyuan University of TechnologyTaiyuan 030024China Interventional Treatment Department Second Hospital of Shanxi Medical UniversityTaiyuan 030001China

High fluorescence quantum yield(QY),excellent fluorescence stability,and low toxicity are essential for a good cellular imaging fluorescent ***-emissive carbon quantum dots(CQDs)with many advantages,such as unique fluorescence properties,anti-photobleaching,low toxicity,fine biocompatibility and high penetration depth in tissues,have been considered as a potential candidate in cell imaging fluorescent ***,N,S-codoped green-emissive CQDs(QY=64.03%)were synthesized by the one-step hydrothermal method,with m-phenylenediamine as the carbon and nitrogen source,and L-cysteine as the nitrogen and sulfur dopant,under the optimum condition of 200℃ reaction for 2 *** luminescence was found to originate from the surface *** light of the satisfactory photobleaching resistance and the low cytotoxicity,CQDs were used as a cell imaging probe for HeLa cell *** results clearly indicate that cells can be labeled with CQDs,which can not only enter the cytoplasm,but also enter the nucleus through the nuclear pore,showing their broad application prospect in the field of cell imaging.

关键词： fluorescence quantum yield green emission carbon quantum dot N,S-codoping cell imaging

Enhanced efficiency and stability of perovskite solar cells by 2D perovskite vapor-assisted interface optimization

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第6期29卷 103-109,I0005页

作者： Minghui Chen Pengwei Li Chao Liang Hao Gu Weishuang Tong shiping Cheng Weili Li Ganqing zhao Guosheng Shao School of Chemistry and Environment Engineering Pingdingshan UniversityPingdingshan 467000HenanChina State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina

Organic–inorganic perovskites solar cells(PSCs)have attracted great attention due to their rapid progress in power conversion efficiency(PCE).However,there is still an enormous challenge to achieve both high efficiency and stability devices as the decomposition of perovskite materials under humid and light ***,we demonstrate that high efficiency and stability of PSCs can be obtained by the reaction of three-dimensional(3D)perovskite with 1,4-butanediamine iodide(BEAI2)*** incorporation of BEAI2 intensively promotes the crystallization of perovskite film with large grain size(~500 nm).Further characterization reveals that the post-treatment perovskite film delivered low interface trap density with long carrier lifetime(>200 ns),long carrier diffusion length(>600 nm)and large carrier mobility(>1.5 cm^2 V-1S-1).Solar cells employing such post-treatment films demonstrated 19.58%PCE without ***,the post-treatment devices can retain over 90%original efficiencies stored under ambient atmospheric conditions and exhibit better stability under 85℃and continuous illumination as a two-dimensional(2D)perovskite thin layer is formed on the surface/or at the grain boundaries of 3D *** study offers an effective way to obtain PSCs with high efficiency and stability.

关键词： Perovskite solar cells 2D/3D perovskite Post-treatment Carrier diffusion length Mobility

Improving solar control of magnetism in ternary organic photovoltaic system with enhanced photo-induced electrons doping

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第3期15卷 2626-2633页

作者： Yujing Du shiping Wang Lei Wang Shengye Jin Yifan zhao Tai Min Zhuangde Jiang Ziyao Zhou Ming Liu Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and Engineeringthe International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologyXi'an Jiaotong UniversityXi'an 710049China State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Center for Spintronics and Quantum Systems State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049China State Key Laboratory for Manufacturing Systems Engineering Collaborative Innovation Center of High-End Manufacturing Equipmentthe International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologyXi'an Jiaotong UniversityXi'an 710049China

§The growing demand for storage space has promoted in-depth research on magnetic performance regulation in an energy-saving ***,we developed a solar control of magnetism,allowing the magnetic moment to be manipulated by sunlight instead of the magnetic field,current,or ***,binary and ternary photoactive systems with different photon-to-electron conversions are *** photovoltaic/magnetic heterostructures with a ternary system induce larger magnetic changes due to higher short current density(J SC)(20.92 mA·cm^(−2))compared with the binary system(11.94 mA·cm^(−2)).During the sunlight illumination,ferromagnetic resonance(FMR)shift increases by 80%(from 169.52 to 305.48 Oe)attributed to enhanced photo-induced electrons doping,and the variation of saturation magnetization(M S)is also amplified by 14%(from 9.9%to 11.3%).Furthermore,photovoltaic performance analysis and the transient absorption(TA)spectra indicate that the current density plays a major role in visible light manipulating *** findings clarify the laws of sunlight control of magnetism and lay the foundation for the next generation solar-driven magneto-optical memory applications.

关键词： multiferroic heterostructure magnetoelectric coupling ferromagnetic resonance magnetic anisotropy interface charge doping

Emerging Negative Warming Impacts on Tibetan Crop Yield

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

Engineering 2022年第7期8卷 163-168页

作者： Tsechoe Dorji Shilong Piao Xuhui Wang Chuang zhao Baohua Liu Anping Chen shiping Wang Tao Wang Key Laboratory of Alpine Ecology and Biodiversity Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100085China Center for Excellence in Tibetan Plateau Earth Science Chinese Academy of SciencesBeijing 100085China Sino–French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing 100871China Department of Biology Colorado State UniversityFort CollinsCO 80523USA

Preserving Tibet’s unique history and cultural heritage relies on the sustainability of the Tibetan croplands,which are characterized by highland barley,the only cereal crop cultivated over 4000 m above sea *** it is unknown how these croplands will respond to climate ***,using yield statistics from 1985 to 2015,we found that the impact of temperature anomalies on the Tibetan crop yield shifted from nonsignificant(P>0.10)in the 1980s and 1990s to significantly negative(P<0.05)in recent ***,the apparent sensitivity of the crop yield to temperature anomalies almost doubled,from(–0.13±0.20)to(–0.22±0.14)t·ha^(-1)℃^(–1).The emerging negative impacts of higher temperatures suggest an increasing vulnerability of Tibetan croplands to warmer *** global warming scenarios of+1.5 or+2.0℃above the pre-industry level,the temperature sensitivities of crop yield may further increase to(–0.33±0.10)and(–0.51±0.18)t·ha^(-1)℃^(–1),respectively,making the crops 2–3 times more vulnerable to warmer temperatures than they are today.

关键词： Tibet Warming Crop yield Barley Negative warming impacts