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The Micro-environment of Propagating Radical for Styrene in Bulk Polymerization

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Chinese Science Bulletin 1993年第12期38卷 1056-1056页

作者：毛友钢郑莹光王国斌沈家骢 Institute of Theoretical Chemistry Jilin University Changchun 130023 PRC

According to J. H. Freed, the dependence of line-width on the motion of β protons having a continuous distribution angle of conformation can be obtained by using a hindered oscillation model, that is T-12=γ2eB2βkT/2ω40I[kT/ω20I sum from n=ijcos(2θie)cos(2θje)mimj+sum from n=ijsin(2θie)sin(2θje)·mimj], （1） where B is a constant; γe, magnetogyric ratio of the electron; β, friction constant; ω0, fiequency of the oscillation; I, the rotation inertia; k, Boltzmann constant; T,

关键词： absolute rotation inertia Boltzmann conformation oscillation monomer friction constants 毛友

MEASUREMENT AND ANALYSIS OF THREE- DIMENSIONAL KINEMATICS OF CERVICAL SPINE WITH THE USE OF COMPUTER VIDEO-IMAGE PROCESSING

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Chinese Journal of Biomedical Engineering(English Edition) 1993年第4期2卷 157-158页

作者： Jun Wang Chunli Zhang Xinzhi Xui Institute of Orthopaedics and Traumatology,Fourth Military Medical University,Xi’an 710032,China

Having a wide range of motion,the cervical spine is rather predisposed to trau-ma and other disorders with serious consequences.The motion of cervical spine is acomplex one composed of micromotions,including horizontal displacements along allthree axes and rotations around them with six freedom degrees of movement.Reporton precise measurement of the three-dimensional motion of the cervical section

关键词： spine consequences freedom VIDEO rotation precise alterations overlapping surveying stand

A NOTE ON PERKO'S THEOREM B

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Chinese Science Bulletin 1981年第3期26卷 205-206页

作者：徐世龙 Sichuan Teachers Collegen this note we try to give a geometric proof of Perko's Theorem B simplifying Perko's analytical proof. Perko's Theorem B reads: Theorem. Let L(α_0) be α limit cyde of α semicomplete polynomial family (mod

In this note, we try to give a geometric proof of Perko’s Theorem B, simplifying Perko’s analytical proof. Perko’s Theorem B reads: Theorem. Let L（α0） be α limit cyde of α semicomplete polynomial family

关键词： proof polynomial exterior rotation interior outer contained 十心 POP contr

THEOREM REGARDING EXISTENCE OF THE BASIC EQUATIONS OF THREE-PROBE ERROR SEPARATION TECHNIQUE AND ITS APPLICATION

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Chinese Science Bulletin 1987年第23期32卷 1649-1650页

作者：朱训生潘德豫薛秉源贝季瑶 Shanghai Jiaotong University

Since 1970s, various scholars at home and abroad have used the three-probe error separation technique to separate high precision roundness error and axis rotation error from measured signals. FT, matrix approach and f... 详细信息

关键词： rotation separate BASIC ERROR contour hence distortion Probe properly satisfied

北京天文台兴隆观测站2.16米望远镜对星模式

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紫金山天文台台刊 1994年第1期 88-90页

作者：高震东

The pointing accuracy of a telescope is influenced by its encoder system, by the alignments of the mounting relative to the earth’s axis of rotation, by the alignment of the optics, by mechanical effects like the flexture of the tube and by systemtic errors of the drive system. As to the 2.16m telescope, it is necessary to establish a pointing model to make normal obsercation easier. In this paper, an empirical approach to set up the pointing model for the 2.16m telescope was reported together with a physical interpretation of most of the individual parameters of this model.

关键词：北京天文台兴隆观 pointing interpretation alignment encoder rotation telescope optics iterative

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GEOPHYSICS

Abstracts of Chinese Geological Literature 2008年第4期24卷 18-19页

20082124 Feng Mei(Institute of Geomechan- ics,Chinese Academy of Geological Sciences, Beijing 100081,China);An Meijian Middle and Upper Crust Shear-Wave Velocity Structure of the Chinese Mainland(Acta Seismologica Sin... 详细信息

关键词： Velocity Shear Mainland Upper Middle rotation GEOP

Study On L—Tryptoqhan Production By Microbiology

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氨基酸和生物资源 1984年第1期12卷 58-59页

作者： Tan gni zhi Li mei Beijing Inastitute of Pharmaceutical Industry Pan nei-giong Zheu yue-fang Wang don-zie Beijing Inastitute of Pharmaceutical Industry Pan nei-giong Zheu yue-fang Wang don-zie

L—Tryptophan（1—amino—28—[3—indoylyl]—propionic acid,2—[3-indoylyl]—（?）—a lanine） The amino acid G6H4 NHCHCCH2CHNH2COOH is neutral and aromatie of ahite or slight yellow color, leaflets crystal, or poader; m.p.275～290 （dec,）; speciftc rotation [（?）]D20=-31.5′（C=1,for water）; p1=5.89; soluble in water, dilue acid and basic solutions, It is decomposed when heated

关键词： decomposed rotation slight heated propionic yellow Study On L neutral adjusted fermentation

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Quick Trip to Pluto

当代外语研究 1994年第6期 2-3页

作者：刘新

At a current distance of 4. 5 billion kilometers from the sun, Pluto isthe only planet in our solar system not yet visited by a spacecraft. Mostmission plans call for a long and expensive journey to the faraway planet... 详细信息

关键词： planet expensive visited journey spacecraft proposal innovative rotation faster basement

Treatment of scoliosis associated Marfan' s syndrome in children

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外科研究与新技术 2003年第2期 84-85页

作者：张学军 Dept Orthop Beijing Children' s Hosp Beijing 100045

Objective To discuss the principle of treatment for scoliosis associated Marfan’ s syndrome in children. Methods Thirty cases of scoliosis associated Marfan’ s syndrome were corrected and followed-up. Thirteen patients underwent posterior fusion whereas 17 cases received anterior release and posterior correction. Among the 30 patients,20 were previously treated with brace and other conservative methods. The results were analyzed using apex vertebral translation (AVT), apex vertebral rotation (AYR),Cobb’s angle,trunk shift (TS).and pre-and post-operative body heights. Results Posterior approach resulted in more complications. Wider range anterior fusion combined with posterior correction improved the result. Conclusion Anterior release combined with posterior correction is the perferred treatment of scoliosis associated Marfan’ s syndrome. 11 refs,1 tab.

关键词： scoliosis children vertebral correction corrected rotation conservative operative trunk body