变向量的英文

• variable vector

• "变"英文翻译    become different; change
• "向量"英文翻译    vector; vector quantity
• "反变向量" 英文翻译 :    contravariant vector
• "反变向量场" 英文翻译 :    contravariant vector field
• "共变向量" 英文翻译 :    covariant vector
• "可变向量" 英文翻译 :    variable vector
• "逆变向量" 英文翻译 :    contravariant vector
• "切变向量" 英文翻译 :    shear vector
• "时变向量" 英文翻译 :    time-varying vector
• "共变向量函数" 英文翻译 :    covariant vector function
• "切变矢量；切变向量" 英文翻译 :    shear vector; shearvector
• "协变向量, 协变矢量" 英文翻译 :    covariant vector
• "变向" 英文翻译 :    changing direction; diversion; making the turn; reversing; veer
• "变向的" 英文翻译 :    deflecting
• "变向阀" 英文翻译 :    makeshift valve
• "变向风" 英文翻译 :    baffle wind; baffling wind; shifting wind; uncertain winds; variable wind
• "变向墙" 英文翻译 :    deflecting wall
• "变向切" 英文翻译 :    angle cut; reverse cut
• "变向台" 英文翻译 :    reversing table; rockover table
• "风变向" 英文翻译 :    wind shifts
• "s-t向量" 英文翻译 :    s-t vector
• "t向量" 英文翻译 :    t vector
• "向量" 英文翻译 :    [数学] vector; vector quantity◇向量分析 vector analysis
• "变向90°摆体" 英文翻译 :    making the hook
• "变向活门" 英文翻译 :    make-shaft valve; makeshift valve

• Covariant vector function
  共变向量函数
• Contravariant vector field
  反变向量场
• The classification of phase portraits about some hamiltonian vector field with z3 - equivariant property
  等变向量场的相图分类
• The paper consists of two parts . in the first part , the definitions of zq - equivariant vector fields and the method of detection functions are stated . in the second part , a concrete numerical example of z8 - equivariant perturbed planar hamiltonian system of of degree 7 is constructed , and for the unperturbed vector field having maximal number of centers , its global phase portraits are analyzed
  本文由两部分组成，第一部分为综述，介绍了z _ q -等变向量场以及判定函数法；第二部分首先讨论了一类7次z _ 8 -等变的平面hamilton系统，研究了具有最大中心数时的hamilton系统可能存在的部分全局象图。
• In the first part , hilbert ' s 16th problem and the studies on it are introduced , and the results of zq - equivariant vector fields of degree 5 ( q = 2 , 3 , 5 , 6 ) are given . in the second part , the definitions of zq - equivariant vector fields and the method of detection functions are stated , and all the forms of nontrivial zq - equivariant planar polynomial vector fields of degree 7 are obtained . in the third part , a concrete numerical example of zt - equivariant perturbed planar hamiltonian system of degree 7 is constructed , and for the unperturbed vector field having maximal number of centers , its global phase portraits are analyzed ( having at least 9 topologically different phase portraits ) . then , for a given parameter group , its phase portrait trend is studied
  第一部分介绍了hilbert第16问题以及它的研究与发展现状，给出了近年来利用李继彬提出的判定函数法得出的z _ q -等变( g = 2 ， 3 ， 5 ， 6 )的5次系统关于它的第二部分的研究结果；第二部分介绍了z _ q -等变向量场以及判定函数法，给出了7次平面多项式系统的所有非平凡z _ q -等变向量场具有的形式；第三部分给出了一个7次平面扰动hamilton系统，研究了它的具有最大中心数的未扰动系统( z _ 7 -等变)的全局象图，得到了9种不同的拓扑图形。