By virtue of some known results of the existence on at most one or two limit cycles of the Lienard systems,using the theory of rotated vector field,we study the number and relative positions of the limit cycles of the n-demensional differential system =y,=-(hxn-1+δ)y-(xn-x)(h>0),where n is a positive integer greater than 1.
利用已有的关于Lienard系统极限环存在性和唯一、唯二性的诸多结论,结合旋转向量场理论,研究了n次微分系统x。
Moreover, the generalized rotated vector field, constructed in the present paper, is used for obtaining the existence condition of period solutions for another system.
然后,利用构造的一个广义旋转向量场得到另一系统的周期解的存在条件。
In this paper by means of three types of exampls,we investigate the distinction problem of what types of bounded separatrix cycles the limit cycle of quadratic system will become,when it is extending in rotated vector field as the parameter varies monotonically in a suitable direction.
本文通过三种类型的例子研究了在旋转向量场中二次系统的极限环随参数按适当方向单调变化而扩大时,将变成何种类型的有界分界线环的判别问题,而且得出二次系统极限环存在的精确参数区间的三个推论。
The 3-D strain field is formulated based on the concept of decomposition of the rotation tensor and is given in terms of one-dimensional(1-D)generalized strains and a 3-D warping displacement.
基于旋转张量分解的概念，得到了由1维广义应变与3维翘曲位移表示的3维应变场。
The Calculation of Hyper-Raman Tensors of the Point Groups with Fivefold Rotation Axes
含有五度旋转轴点群的超拉曼张量的计算
Registration of diffusion tensor images based on rotation invariants
基于旋转不变测度的扩散张量图像配准
rotarydisplacement meter
“旋转”排量式仪表
The rotational inertias of uniform rotational rigid surfaces about the around axis
均质旋转面绕旋转轴转动的转动惯量
rotary displacement pump
回转泵，旋转排量泵
vibration to rotation energy transfer
振动 旋转能量转移
On the Contrast Study Between Spinor and Tensor, Spin Frame and Null Frame;
旋量与张量、旋标架与零标架的对比研究
pneumatic transmitting rotameter
气动传送旋转流量计
dashpot rotameter
带阻尼器的旋转流量计
rotary fixed displacement motor
旋转式固定排量发动机
tapered tube rotameter
锥形管柱式旋转流量计
rotary-sliding-vane flowmeter
旋转滑动叶片式流量计
metal tube rotameter
金属管式旋转流量计
any rotating body has an angular momentum about its center of mass; angular momentum makes the world go round.
角动量使地球在旋转。
The state of being twisted into a spiral;torsional stress or strain.
螺旋状，扭力扭成螺旋状；扭转的压力或张力
"Auto. Rotate Form To Save Roll Paper
"自动旋转纸张格式以便节省卷筒纸
Rafe glances once more toward the revolving doors from the station that lead onto the platform.
雷夫到处张望转头，看着通向月台的旋转门。