检索结果-南通市图书馆

Operator Product Formulas in the Algebraic Approach of the Refined Topological Vertex

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第2期30卷 37-40页

作者： CAI li-Qiang wang li-fang WU Ke YANG Jie School of Mathematical Sciences Capital Normal UniversityBeijing 100048

The refined topological vertex of Iqbal-Kozcaz-Vafa has been investigated from the viewpoint of the quantum algebra of type W1+∞by Awata,Feigin,and *** introduced the trivalent intertwining operator?which is normal ordered along with some *** manage to establish formulas from the infinite operator product of the vertex operators and the generalized ones to restore this prefactor,and obtain an explicit formula for the vertex realization of the topological vertex as well as the refined topological vertex.

关键词： vertex topological refined

Magnetic properties and structure of (001)-oriented [CoPt/C]_n /Ag nanocomposite films on the glass substrates

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2006年第3期25卷 265-269页

作者： JIN Tao XU Xiaohong wang fang li Xiaoli JIANG Fengxian YANG Zhiguang School of Chemistry and Materials Science Shanxi Normal University Linfen 041004 China

The highly （1301） oriented triple system of [CoPt/C]n/Ag films was deposited on glass substrates by DC and RF magnetron sputtering. After annealing at 600℃ for 30 min, thin films become magnetically hard with coercivities in the range of 160-875 kA/m because of high anisotropy associated with the L10 ordered phase. C doping plays an important role in improving （001） texture and reducing the intergrain interactions. The oriented growth of CoPt films was influenced strongly by the number of repetitions （n） of CoPt/C. By controlling the C content and the number of repetitions （n） of CoPt/C, nearly perfect （001） orientation can be obtained in the [CoPt3nm/C3nm]5/Ag50 nm.

关键词： [CoPt/C]n/Ag multilayer films (001) orientation C content number of repetition

Novelionic Polymer Electrolytes for Dye Sensitized Solar Cell

在线全文

学校读者我要写书评

暂无评论

复旦学报（自然科学版） 2005年第5期44卷 750-751页

作者： li wang Shibi fang Yuan lin Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

In recent years, dye-sensitized solar cells(DSC) based on nanocrystalline porous TiO2 films have attracted much attention because of their relatively higher efficiency and low cost compared with conventional inorganic photovoltaic devices[1]. This type of solar cell has achieved an impressive photo-to-energy conversion efficiency of over 10% where the electrolyte is volatile organic liquid solvents containing I-/I-3- as redox couple. Because of high volatilities, solvent losses occur during long-term operations, resulting in lowered DSC *** leakage of liquid electrolyte also limits the durability of DSC.

关键词：太阳能电池电解液聚合体激活功能电化学

COMPOSITE MODEliNG APPROACH AND EXPERIMENTAL STUDY FOR SUBSURFACE TRANSPORT OF CONTAMINANTS FROM LAND-DISPOSAL SITES

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2003年第4期15卷 1-9页

作者： wang Chao, wang Pei-fang, li Yong Department of Environmental Engineering, Hohai University, Nanjing 210098, China Dept. of Environ. Eng. Hohai Univ. Nanjing 210098 China

A composite modeling approach was presented for simulating thethree-dimensional (3-D) subsurface transport of dissolved contaminants with transformation *** approach was based on vertical infiltration and contaminant transport in the unsaturated zoneand 3-D groundwater flow and contaminant migration in the saturated zone. Moisture movement andgroundwater flow were considered to be steady, but contaminant transport was treated as continuousand transient. The transformed unsaturated zone and saturated zone transport equations were solvednumerically with different techniques. The model contains a 3-D solution to flow and transport inthe saturated zone, as well as two-dimensional solutions to vertical cross-sectional and arealscenarios. In order to verify the composite modeling, extensive experiments were conducted in twolarge-scale variable-slope soil tanks of 1200cm in length, 150cm in width and 150cm in height. Sandsoil was filled in the tank as the porous media. The solutions of KBr or NH_4C1 were introduced intoeach soil tank from 80 X 37cm^2 area sources located on the top of the porous medium. Results fromnumerical simulations were compared with the data from tests. Predicted results are in goodagreement with the experimental data.

关键词： composite modeling groundater flow finite element model experiment

Fiber Optic 3-Component Seismometer

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2014年第2期4卷 102-107页

作者： Jing HAN Wentao ZHANG Dongshan JIANG Zhaogang wang fang li Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences No. 35 Qinghua EastRoad Hai dian District Beijing 100083 China

An all-metal 3-component optical fiber seismometer was proposed and experimentally demonstrated. The theoretical analysis was given based on the electro-mechanical theory. Calibration results showed that the axis sensitivity was about 41 dB （re： 0dB=1rad/g） with a fluctuation ＋2dB in the frequency bandwidth of 5 Hz - 400 Hz. A transverse sensitivity of about -40 dB was achieved. The fluctuation of the acceleration sensitivity for the three accelerometers in the seismometer was within ±2.5 dB. The minimum phase demodulation detection accuracy of the phase-generated cartier （PGC） was 10-Srad/√Hz, and the minimum detectable acceleration was calculated to be 90 ng/√Hz.

关键词： Fiber optic seismometer transverse sensitivity accelerometer

Risk factors for prehypertension in Xinjiang Uygur population

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

Journal of Geriatric Cardiology 2010年第2期7卷 97-100页

作者： Lei wang Nan-fang li Jin Yang ling Zhou Tao li Jing Hong Center for Diagnosis Treatment and Research of Hypertension in XinjiangUrumqiXinjiang830000China

Objective To assess the risk factors for prehypertension in Xinjiang Uygur population. Methods A cross-section study was conducted in a Xinjiang Uygur population（438 males and 716 females,aged 30 to 70 years）.The fasting lipid profiles,serum glucose,insulin,and uric acid were *** model assessment of insulin resistance（HOMA-IR）index was used to assess insulin resistance（IR）.Binary logistic regression analysis was performed to determine risk factors for *** pressure levels ofnormotensives and prehypertensives in different body mass index（BMI）categories were compared. Results Binary logistic regression analysis performed after adjustment for gender,lipids profiles,waist-to-hip ratio,uric acid,HOMA-IR,and lifestyle（alcohol drinking and smoking）showed a significantly increasing prevalence of prehypertension with *** odds ratios for prehypertension against the lowest BMI group（separated by 24 and 28）were 1.934 and 2.490（95% confidence interval：1.435-2.606 and 1.825-3.399,respectively）.Age was independently correlated to the increasing prevalence of ***-IR was not associated with *** mean diastolic blood pressure（DBP）was significantly increased with BMI categories in either normotensives or prehypertensives（P〈0.001）while the mean systolic blood pressure（SBP）was significantly increased with BMI only in normotensives（P〈0.001）. Conclusions In Xinjiang Uygurs,BMI and age was the risk factors for *** is significantly increased with *** is not associated with *** findings emphasize the importance of management of obesity for the control of blood pressure and other cardiovascular complications.

关键词： prehypertension body mass index Uygur.

Synthesis, DNA-binding, and Photocleavage of 2,3-Di-2-pyridylquinoxaline-silver(Ⅰ) Complex

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

Chemical Research in Chinese Universities 2008年第1期24卷 15-19页

作者： wang Xiu-li fang Jia-ni BI Yan-feng liN Hong-yan liU Guo-cheng Faculty of Chemistry and Chemical Engineering Liaoning Key Laboratry of Applied Chemistry Bohai University Jinzhou 121000 P. R. China

A new dinuclear complex, [Ag（L）（CH3CN）]2（ClO4）2·2H2O（L=2,3-di-2-pyridylquinoxaline）, was prepared and characterized by elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction analyses. The interaction of the complex with calf thymus DNA（CT-DNA） was investigated by absorption, fluorescence spectroscopies, and viscosity measurement. The results suggested that the complex was bound to DNA via an intercalative mode. The intrinsic binding constant value Kb was found to be approximately 1.48×10^3 L·mol^-1. Moreover, the Ag（I） complex could cleave the plasmid pUC19 DNA from the supercoiled Form Ⅰto the nicked FormⅡ under irradiation at 365 nm.

关键词： DNA Ag-Polypyridyl complex Interaction Fluorescence Cleavage

Killing effect of Chinese hamster V79 cells exposed to accelerated carbon ions and RBE determination

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2002年第4期13卷 259-263页

作者： li Qiang, ZHOU Guang-Ming, wang Ju-fang, li Wen-Jian, WEI Zeng-Quan(Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000) Institute of Modern Physics the Chinese Academy of Sciences Lanzhou 730000

Survival curves of Chinese hamster V79 cells exposed to accclerated carbon ions with linear energy transfers of 125.5, 200 and 700 keV/μm were measured, respectively. Inactivation cross sections corresponding to the irradiation above were deduced from the V79 cell survival curves. They are 7.86±0.17, 10.44±1.11 and 32.32±3.58 μm2 in turn. With the surviving response of V79 cells to 60Co γ-rays as a reference value, relative biological effectiveness at 10%, 20%, 50% and 80% survival levels were given for the accelerated carbon ions. The results showed that carbon ions with LET of 125.5 keV/μm had a higher value of RBE at all the four survival levels than the carbon ions with other LETs. It was prompted that the maximum value of RBE for the V79 cell surviving as the biological endpoint emerged at the LET below 200 keV/μm for carbon ions.

关键词：放射生物学碳离子 V79细胞

Coil migrating out of a small wide-necked aneurysm embolized with stent-assisted technique

在线全文

学校读者我要写书评

暂无评论

介入放射学杂志 2006年第2期15卷 126-128页

作者： GAO Bu-lang li Ming-hua wang Yong-li fang Chun Department of Radiology Shanghai Sixth People＇s HospitalShanghai Jiaotong UniversityShanghai 200233Chian

Stent-assisted coiling is one of the techniques used to treat intracranial aneurysms with wide necks or unfavorable neck-to-fundus ratios, which have been traditionally considered as poor candidates for Guglielmi detachable coil ( GDC ) embolization owing to the significant risk of coil herniation into the parent artery[1-5]. With this technique, fusiform, wide-necked and geometrically difficult aneurysms as well as pseudoaneurysms have been successfully treated with different follow-up results. Herein, we present an aneurysm case with a coil escaping from the confinement of the stent.

关键词：血管疾病血管畸形造影诊断检查方式