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检索条件："关键词=helical "
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Fixation for the helical structure of a glassy cholesteric liquid crystal reflective film被引量：1
《Journal of University of Science and Technology Beijing》2006年第5期476-479,共4页Jiumei Xiao Wanli He Jin Gao Huai Yang 
This work was financially supported by the National High-Tech Research and Development Program of China (No. 2003AA327050).
The planar texture of glassy cholesteric siloxane cyclic side-chain liquid crystals was fixed by quenching initially. Then the polymer network formed by the optically active polymerizable monomers imposed additional c...
关键词：cholesteric liquid crystal helical structure glassy liquid crystal 
The loss of function of HEL,which encodes a cellulose synthase interactive protein,causes helical and vine-like growth of tomato被引量：2
《Horticulture Research》2020年第1期493-502,共10页Qihong Yang Xiaoshuai Wan Jiaying Wang Yuyang Zhang Junhong Zhang Taotao Wang Changxian Yang Zhibiao Ye 
supported by grants from the NSFC(31672149,31991182 and 31872122);the National Key R&D Program of China(2017YFD0101902).
Helical growth is an economical way for plant to obtain resources.The classic microtubule–microfibril alignment model of Arabidopsis helical growth involves restriction of the appropriate orientation of cellulose mic...
关键词：HELICAL CELLULOSE walls 
Passive Control of Flow-Induced Vibration(FIV)by Helical Strakes for Two Staggered Flexible Cylinders被引量：1
《China Ocean Engineering》2021年第4期475-489,共15页XU Wan-hai WANG Qi-cheng QIN Wen-qi DU Zun-feng 
the National Natural Science Foundation of China(Grant No.51979193);the Natural Science Foundation of Tianjin(Grant No.20JCYBJC00890).
Helical strake is a widely-used device for passive flow-induced vibration(FIV)control of cylindrical structures.It is omnidirectional and can effectively reduce FIV response amplitude.Studies on the passive FIV contro...
关键词：flow-induced vibration(FIV) passive control helical strakes flexible cylinders staggered arrangement 
Effect of antenna helicity on discharge characteristics of helicon plasma under a divergent magnetic field
《Plasma Science and Technology》2024年第6期50-59,共10页孙萌 徐晓芳 王陈文 尹贤轶 陈强 张海宝 
supported by the Beijing Municipal Natural Science Foundation (No. 1242015);Discipline Construction of Material Science and Engineering (Nos. 21090122014 and 21090123007)。
The characteristics of the blue core phenomenon observed in a divergent magnetic field helicon plasma are investigated using two different helical antennas, namely right-handed and lefthanded helical antennas. The mod...
关键词：helicon plasma non-uniform magnetic field helical antenna blue core discharge mechanism 
Tailoring Cationic Helical Polypeptides for Efficient Cytosolic Protein Delivery被引量：1
《Chemical Research in Chinese Universities》2020年第1期134-138,共5页WANG Ruijue SHENG Kai HOU Yingqin SUN Jialing LU Hua 
Supported by the National Key Research and Development Program of China(No.2016YFA0201400);the National Natural Science Foundation of China(Nos.21434008,21722401).
Protein delivery is of central importance for both diagnostic and therapeutic applications.However,protein delivery faces challenges including poor endosomal escape and thus limited efficiency.Here,we report the facil...
关键词：Cationic helical polypeptide Protein delivery Cytosolic protein 
FORMULATION AND EVALUATION OF AN ANALYTICAL STUDY FOR CYLINDRICAL HELICAL SPRINGS被引量：2
《Acta Mechanica Solida Sinica》2010年第1期85-94,共10页Aimin Yu Changjin Yang 
supported by the National Natural Science Foundation of China (No.10572105);the Shanghai Leading Academic Discipline Project (No.B302)
The free vibration analysis of cylindrical helical springs is carried out by means of an analytical study. In the governing equations of the motion of the springs, all displacement functions are defined at the centroi...
关键词：cylindrical helical spring free vibration FREQUENCY mode shape 
Synthesis, Crystal Structure and Properties of a New Cadmium Compound with(1,1？-(1,4-Butanediyl)bis(imidazole) and p-Hydroxybenzoic Acid被引量：2
《Chinese Journal of Structural Chemistry》2017年第8期1395-1401,共7页周实 吕丛 李佳 刘博 
Supported by the Science and Technology Development Plan of Jilin Province(20150520006JH);Science and Technology Research Project of Education Department of Jilin Province(2016219);Science and Technology Development Plan of Siping City(2013055)
A new metal-organic framework based on bbi and PHBA（bbi = 1,1＇-（1, 4-butanediyl）bis（imidazole）, PHBA = p-hydroxybenzoic acid）, namely, [Cd（bbi）（PHBA）2]n（1） has been synthesized by the conventional method....
关键词：N-donor ligand helical structure （4 4） net fluorescence 
HELICAL SYMMETRIC SOLUTION OF 3D NAVIER-STOKES EQUATIONS ARISING FROM GEOMETRIC SHAPE OF THE BOUNDARY
《Acta Mathematica Scientia》2018年第3期1057-1104,共48页Weifeng JIANG Kaitai LI 
supported by NSFC(91330116);NSFC(11371289);NSFC(11371288);State Major Basic Research and Development Project(2011CB 706505)
In this article, we investigate three-dimensional solution with helical symmetry in a gap between two concentric rotating cylinders, inside is a helicoidal surface（screw propeller）while outside is a cylindrical surf...
关键词：Navier-Stokes equations helicoidal surface rotating helical flow 
Diagnosis of the nutcracker phenomenon by multislice helical computed tomography angiography被引量：11
《Chinese Medical Journal》2004年第12期1873-1875,共3页符伟军 洪宝发 肖越勇 杨勇 蔡伟 高江平 郭刚 王晓雄 
关键词：nutcracker phenomenon · hematuria · tomography helical computed 
Design and Analysis of an Active Helical Drive Downhole Tractor被引量：2
《Chinese Journal of Mechanical Engineering》2017年第2期428-437,共10页Yujia LI Qingyou LIU Yonghua CHEN Tao REN 
Supported by Sichuan Provincial Science and Technology Program of China(Grant Nos.2013GZ0150,2014GZ0121);Research Project of Key Laboratory of Fluid and Power Machinery of Ministry of Education,Xihua University,China
During oil-gas well drilling and completion, downhole tools and apparatus should be conveyed to the destination to complete a series of downhole works. Downhole tractors have been used to convey tools in complex wellb...
关键词：Serial · Active · Helical · Downhole · Tractor Wellbore 
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