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Soller slits automatic focusing method for multi-element fluorescence detector

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Nuclear Science and Techniques 2016年第5期27卷 179-187页

作者： Ya-yun Yang Qian Gao Song-Qi Gu hai-sheng yu Rui-You Lu yu-Ying Huang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China University of Chinese Academy of Sciences Beijing 100049 China

In X-ray absorption fine structure(XAFS) experiments,Soller slits are widely used as filter devices in order to improve the signal to noise *** high accuracy manual focusing operations is a time-consuming process;therefore,this work introduces an automatic focusing method for Soller slits in multi-element fluorescence *** method establishes a relation model between the fluorescence intensity distribution and the coordinates of the fluorescence excitation *** to this relation model,the actual coordinates of the fluorescence excitation point can be deduced from the detected fluorescence intensity distribution and used in focusing *** method has proven to be feasible in an XAFS experiment at the BL14W1 beamline of the Shanghai Synchrotron Radiation Facility.

关键词：荧光检测器聚焦方法狭缝 X射线吸收精细结构 XAFS实验关系模型光强度分布高信噪比

Theoretical Studies on the Structures and Reactions of Halocarbenoids(Ⅰ)Structures and Stability of Chlorocarbenoid CHCl_2

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Chemical Research in Chinese Universities 1997年第3期13卷 256-261页

作者： Li LI Ji-hai, FENG sheng-yu,Liu Wei (Chemical College,Shandong University,Jinan, 250100) SHANDONG UNIV CHEM COLLJINAN 250100PEOPLES R CHINA

The chlorocarbenoid , CHCl2Li , was studied by means of ab initio molecular or- bital theory. Three equilibrium structures and two isomerization transition states were located. The calculations showed that the three-membered ring structure is the most stable. The 'classical tetrahedral' structure is not the local minimum on the potential energy surface.

关键词： Chlorocarbenoid isomeric structure Ab initio molecular orbital calcu- lation

Cilostazol inhibits plasmacytoid dendritic cell activation and antigen presentation

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Journal of Geriatric Cardiology 2015年第4期12卷 388-393页

作者： Fei SUN Zhao YIN hai-sheng yu Quan-Xing SHI Bei ZHAO Li-Guo ZHANG Shou-Li WANG Department of Cardiology The 306th Hospital of PLA No. 9 Anxiangbeili Street Beijing China CAS Key Laboratory of Infection and immunity Institute of Biophysics Chinese Academy of Sciences Beijing China

Background Cilostazol, an anti-platelet drug for treating coronary heart disease, has been reported to modulate immune cell functions Plasmacytoid dendritic cells （pDCs） have been found to participate in the progression of atherosclerosis mainly through interferon ct （IFN-ct） production. Whether cilostazol influences pDCs activation is still not clear. In this study, we aimed to investigate the effects of cilostazol on cell activation and antigen presentation ofpDCs in vitro in this study. Methods Peripheral blood mononuclear cells isolated by Ficoll cen- trifugation and pDCs sorted by flow cytometry were used in this study. After pretreated with cilostazol for 2 h, cells were stimulated with CpG-A, R848 or virus for 6 h or 20 h, or stimulated with CpG-B for 48 h and then co-cultured with naive T cell for five days. Cytokines in supernatant and intracellular cytokines were analyzed by ELISA or flow cytometry respectively. Results Our data indicated that cilostazol could inhibit IFN-α and tumor necrosis factor α （TNF-α） production from pDCs in a dose-dependent manner. In addition, the ability of priming na ve T cells of pDCs was also impaired by cilostazol. The inhibitory effect was not due to cell killing since the viability of pDCs did not change upon cilostazol treatment. Conclusion Cilostazol inhibits pDCs cell activation and antigen presentation in vitro, which may explain how cilostazol protects against atherosclerosis.

关键词： Antigen presentation Cilostazol Interferon α Plasmacytoid dendritic cell Tumor necrosis factor α

Fractal model of spontaneous imbibition in low-permeability reservoirs coupled with heterogeneity of pore seepage channels and threshold pressure

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Petroleum Science 2024年第2期21卷 1002-1017页

作者： Ming-sheng Zuo Hao Chen Xi-Liang Liu hai-Peng Liu Yi Wu Xin-yu Qi National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Safety and Ocean Engineering China University of Petroleum(Beijing)Beijing102249China

Spontaneous imbibition(SI)is an important mechanism for enhancing oil recovery in low-permeability *** to the strong heterogeneity,and the non-Darcy flow,the construction of SI model for lowpermeability reservoirs is extremely ***,traditional SI models based on single or averaged capillary tortuosity ignore the influence of heterogeneity of pore seepage channels and the threshold pressure(TP)on ***,in this work,based on capillary model and fractal theory,a mathematical model of characterizing SI considering heterogeneity of pore seepage channels is *** this basis,the threshold pressure was introduced to determine the pore radius at which the wetted phase can displace *** proposed new SI model was verified by imbibition experimental *** study shows that for weakly heterogeneous cores with permeability of 0-1 m D,the traditional SI model can characterize the imbibition process relatively accurately,and the new imbibition model can increase the coefficient of determination by 1.05 ***,traditional model has serious deviations in predicting the imbibition recovery for cores with permeability of 10-50 m *** new SI model coupling with heterogeneity of pore seepage channels and threshold pressure effectively solves this problem,and the determination coefficient is increased from 0.344 to 0.922,which is increased by2.68 *** low-permeability reservoirs,the production of the oil in transitional pores(0.01-0.1μm)and mesopores(0.1-1μm)significantly affects the imbibition recovery,as the research shows that when the heterogeneity of pore seepage channels is ignored,the oil recovery in transitional pores and mesopores decreases by 7.54%and 4.26%,*** analysis shows that increasing interfacial tension,decreasing contact angle,oil-water viscosity ratio and threshold pressure will increase imbibition *** addition,there are critical values for the influence of these factors o

关键词： Spontaneous imbibition Low-permeability reservoir Fractal model Threshold pressure Capillary tube

Hydnaceous fungi of China 1. Stecchericium （Aphyllophorales）, a genus new to China

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菌物学报 2008年第1期27卷 57-61页

作者： yuAN hai-sheng DAI yu-Cheng Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

The hydnaceous genus Stecchericium is newly recorded from southeast of China. It is characterized by imbricate basidiocarps, tubular and thick-walled gloeocystidia, and small, ellipsoid, finely asperulate, strongly amyloid basidiospores. An illustrated description of Stecchericium seriatum is given based on the materials collected from yunnan Province.

关键词：中国齿状真菌刺孢齿耳属非褶菌目新记录属

Two species in Hymenochaetaceae （Basidiomycota） new to China

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菌物学报 2008年第1期27卷 151-155页

作者： yuAN hai-sheng DAI yu-Cheng Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

1 INTRODUCTION Wood-inhabiting fungi from northern China were investigated extensively during last ten years, and the species in the area are relatively well known (Dai 2000; Dai et al. 2006, 2007; Wei et al. 2005;

关键词：中国锈革孔菌科新记录新种

The therapeutic effect of expanded scalp flaps pedicled with the superficial temporal vessel for the reconstruction of the large facial skin scar

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Chinese Journal of Plastic and Reconstructive Surgery 2019年第4期1卷 11-14页

作者： hai-sheng yu Si-ding LU Department of plastic surgery the First Affiliated Hospital of Guangxi Medical UniversityNanning CityGuangxi Province530021China

Objective To investigate the therapeutic effect of expanded scalp flaps pedicled with superficial temporal vessel in the repair of facial skin *** From May 2017 to October 2018,4 patients with facial skin scars were treated with expanded scalp flaps pedicled with superficial temporal vessels and laser hair *** patients were followed up for at least 6 to 12 *** The flaps of all 4 patients survived well,and the color,texture and thickness of the flaps matched well with the surrounding skin *** Expanded scalp flaps pedicled with superficial temporal vessel is a good option for repairing facial skin scars,which is worthy of clinical application.

关键词： Expanded scalp flap face skin scar

Derivation of Expanded Isospectral-Nonisospectral Integrable Hierarchies via the Column-vector Loop Algebra

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 778-800页

作者： hai-feng WANG yu-feng ZHANG School of Science Jimei UniversityXiamen 361021China School of Mathematics China University of Mining and TechnologyXuzhou 221116China

A scheme for generating nonisospectral integrable hierarchies is *** on the method,we deduce a nonisospectral hierarchy of soliton equations by considering a linear spectral *** follows that the corresponding expanded isospectral and nonisospectral integrable hierarchies are deduced based on a 6 dimensional complex linear space ■.By reducing these integrable hierarchies,we obtain the expanded isospectral and nonisospectral derivative nonlinear Schr?dinger *** using the trace identity,the biHamiltonian structure of these two hierarchies are also ***,some symmetries and conserved quantities of the resulting hierarchy are discussed.

关键词： expanded isospectral-nonisospectral integrable hierarchies column-vector loop algebra bi-Hamiltonian structure symmetry

Isogeometric Analysis for the Arbitrary AFG Microbeam with Two-Phase Nonlocal Stress-Driven Model

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Acta Mechanica Solida Sinica 2024年第2期37卷 341-360页

作者： Pei-Liang Bian Zhaowei Liu hai Qing Tiantang yu Department of Engineering Mechanics Hohai UniversityNanjing211100China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Scale effects play critical roles in the mechanical responses of *** isogeometric analysis was developed here to investigate the mechanical responses of an axially functionally graded *** Euler–Bernoulli beam model was utilized,and size effects in the structure were modeled with a stress-driven two-phase local/nonlocal integral *** governing equation of microstructures was given in an equivalent differential form with two additional constitutive boundary *** framework was verified and utilized to analyze the microbeam’s static and dynamic mechanical *** present work showed great potential for modeling various types of functionally graded microstructures.

关键词： Isogeometric analysis Size effect Functionally graded material Nonlocal theory Euler-Bernoulli beam