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ANALYSIS OF HUMAN PLACENTA BY ^(31)P NUCLEAR MAGNETIC RESONANCE AND THIN-LAYER CHROMATOGRAPHY SCANNING COMBINED WITH THE CORRECTIVE METHOD OF ABSORBANCE PROPORTIONAL COEFFICIENT
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作者 Rong GUO Jian wei CHEN Yi Min XU AiHua ZHANG Nanjing College of Traditional Chinese Medicine,Nanjing 210029 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第12期1081-1084,共4页
Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance(^(31)P NMR)spectroscopy and thin-layer chromatography(TLC) scanning combined with the corrective method of absorbance pr... Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance(^(31)P NMR)spectroscopy and thin-layer chromatography(TLC) scanning combined with the corrective method of absorbance proportional coefficient. The NMR spectrometer used this investigation was a Bruker AM-500 spectrometer operating at 202.4 MHz for ^(31)P chemical shifts are relative to 85% phosphoric acid. TIC was carried out by silica gel H plate developed in chloroform-methanol-glacial acetic acid-ethanol-water(25:4:6:2:0.5),with Vaskovsky reagent as colour -developing agent of phospholipids. 展开更多
关键词 P NUCLEAR MAGNETIC RESONANCE AND THIN-LAYER CHROMATOGRAPHY SCANNING COMBINED WITH THE CORRECTIVE method OF ABSORBANCE PROPORTIONAL COEFFICIENT ANALYSIS OF HUMAN PLACENTA BY LPC TLC
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Establishment and application of detective method of anti-body absorbing red blood cell ARBC) by flow cytometer (FCM)
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《中国输血杂志》 CAS CSCD 2001年第S1期374-,共1页
关键词 BODY FCM by flow cytometer Establishment and application of detective method of anti-body absorbing red blood cell ARBC CELL flow
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ANALYSIS OF THE DEFLECTION OF REEDS IN AUTOMOTIVE HYDRAULIC SHOCK ABSORBERS
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作者 Chen Yong,Sun Fengchun (School of Vehicular Engineering, Beijing Institute of Technology) Wang Ying, Zhang Jianrong (Taiyuan Heavy Machinery Institute Liaoning Institute of Technology) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第3期241-244,共4页
The deformation of reeds in automotive hydraulic shock absorbers is analyzed with the finite element method. Combination of different thick reeds mounted on different supports is studied. The computational results sho... The deformation of reeds in automotive hydraulic shock absorbers is analyzed with the finite element method. Combination of different thick reeds mounted on different supports is studied. The computational results show that deformation of the overlapped reeds is not always equal to the sum of deflection of single reed under any conditions. Experimental results prove computational results to be correct and computational method effective. The method of analysis and view of point can provide reference to the design and manufacture of hydraulic shock absorbers using reeds. 展开更多
关键词 Hydraulic shock absorber Reed Finite element method
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Reduced-order modeling and vibration transfer analysis of a fluid-delivering branch pipeline that consider fluid–solid interactions
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作者 Wenhao JI Hongwei MA +1 位作者 Wei SUN Yinhang CAO 《Frontiers of Mechanical Engineering》 SCIE CSCD 2024年第2期75-97,共23页
The efficient dynamic modeling and vibration transfer analysis of a fluid-delivering branch pipeline(FDBP)are essential for analyzing vibration coupling effects and implementing vibration reduction optimization.Theref... The efficient dynamic modeling and vibration transfer analysis of a fluid-delivering branch pipeline(FDBP)are essential for analyzing vibration coupling effects and implementing vibration reduction optimization.Therefore,this study proposes a reduced-order dynamic modeling method suitable for FDBPs and then analyzes the vibration transfer characteristics.For the modeling method,the finite element method and absorbing transfer matrix method(ATMM)are integrated,considering the fluid–structure coupling effect and fluid disturbances.The dual-domain dynamic substructure method is developed to perform the reduced-order modeling of FDBP,and ATMM is adopted to reduce the matrix order when solving fluid disturbances.Furthermore,the modeling method is validated by experiments on an H-shaped branch pipeline.Finally,transient and steady-state vibration transfer analyses of FDBP are performed,and the effects of branch locations on natural characteristics and vibration transfer behavior are analyzed.Results show that transient vibration transfer represents the transfer and conversion of the kinematic,strain,and damping energies,while steady-state vibration transfer characteristics are related to the vibration mode.In addition,multiple-order mode exchanges are triggered when branch locations vary in frequency-shift regions,and the mode-exchange regions are also the transformation ones for vibration transfer patterns. 展开更多
关键词 fluid-delivering branch pipeline vibration transfer analysis reduced-order modeling fluid-solid interactions finite element method absorbing transfer matrix method
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RCS Evaluation of Dihedral corner Renector by Complex Ray Method 被引量:1
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作者 DuHuiping RuanYingzheng 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 1996年第1期31-36,共6页
With the techniques provided by the complex my method,like co,nplex ray expansion, complex mytracing,complex my paraxial approximation, etc.,the back scatter of dihedral corner reflectors is evaluated.Numerical result... With the techniques provided by the complex my method,like co,nplex ray expansion, complex mytracing,complex my paraxial approximation, etc.,the back scatter of dihedral corner reflectors is evaluated.Numerical results show that this method gives good and useful RCS prediction of the targets. 展开更多
关键词 s:radar cross section(RCS) dihedral corner reflector radar absorbing materials.complex ray method(CRM)
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