查询词典 plane curve

This essay studies the graph characteristics method of parameter curve and its describing mdthed and the evaluation of the plane region area closed by itself.

研究参数方程所示曲线的图象特点及描绘方法、自身封闭所围平面图形的面积的求法，弥补了现行教材的不

Its shape, known as a 'tri-plane curvature', comprises three curves, or planes, rather than being a continuous curve.

它的造型称为"三翼式曲线"，由三道曲线或平面组成，而不是一条连续的曲线。

In the direction perpendicular to the rolling plane convex curve was continuous basic cylindrical or conical roller to prevent roller and raceway contact points to the stress concentration.

在垂直于滚动方向的平面内呈连续的微凸曲线的基本圆柱形或圆锥形的滚道，以防止在滚子与滚道接触处产生应力集中。

The maximal depth model for single-pass milling process, the depth and surface roughness for plane surface are established. The milled profile of a single-pass milling of the jet can be modeled as a cosine curve of the form. Therefore, the maximal depth model for single-pass milling is established which indicates the quantitative relationship between the AWJ single-pass milling depth and the milling parameters.

假设磨料水射流单次铣削时的工件横截面形状为余弦曲线，建立了磨料水射流单次铣削的最大深度模型，分析了水射流压力、磨料流量、靶距、喷嘴横移速度、横向进给量和喷嘴直径及材料性能参数对单次铣削最大深度的影响规律。

Mathematics Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed reference.

坐标：由两个或多个数值组成的数组中的任一数值，用来在一个直线系统或其它固定参照数值方面决定点、直线、曲线或平面在已知范围空间内的位置

Detail are introduced as following: transfering the LS equation to difference equation, setting the initial conditions for different shape explosive at different initiation way (point, line, plane, divergent or convergent); the dealing method of different edge conditions; how to draw the curve graph in two dimensional space or surface graph in three dimensional space with the calculated data.

本文提出了在三维直角坐标系中爆轰波传播LS方程离散化方法，建立了相应的差分方程，研究了对不同形状炸药在多种起爆形式（点、线、面、散心、聚心）下初值条件的设定，以及各种边界条件的处理方法。

And the devices'properties and improve the properties to prepare the artificial boundary. The bi-epitaxial YBCO superconducting film with 45°grain boundary in a-b plane was made for the first time in China in this article by magnetic sputtering instrument that was designed and fabricated by ourselves. The x-ray θ～ 2θ scan 、Ф scan、rocking curve、non-symmetry diffraction and SEM、 TEM、AES etc. were utilized in the study.

为此，本工作采用自行设计制造的全金属密封超高真空磁控溅射设备，利用x射线θ～2θ扫描、Ф扫描、摇摆曲线、非对称衍射及SEM、TEM、AES等分析测试手段，在国内首次、也是至今唯一的一家，制得a—b平面内具有45°人工晶界的双外延YBCO超导薄膜，并进而得到双外延晶界Josephson结。

And then, in this part, following the idea of Topping [51, 52], we will show an isoperimetric inequality (6.3.1) on surfaces of non-positive Gaussian curvature by means of the curve shortening flow on surfaces, this inequality can be considered as a generalization of the Banchoff-Pohl inequality in the Euclidean plane.

然后，仿照Topping[51]和[52]利用平均曲率流证明等周不等式的想法，我们利用曲面上的曲线缩短流在Gauss曲率非正的曲面上证明了一个等周不等式(6.3.1)，它可以看成欧氏平面上Banchoff-Pohl [8]不等式在曲面上的推广。

The techniques of the midface rejuvenation develop with the understanding of the aging appearance and the development of the facial anatomy. The earliest form of rhytidectomy only removed a piece of redundant skin, but failed to achieve significant long-term benefit. To achieve a more durable benefit, numerous adaptations of face-lift techniques are devised, including SMAS face-lift, malar fat elevation and extended supraplastysmal plane face lift. The subperiosteal approach was firstly performed in 1980s. Youthful curve was detailed by Little William in 2000. To obtain the architectural ogee, the approach of volumetric sculpture, also named three-dimensional rejuvenation, was described.

随着整形美容外科医生对面部衰老变化的认识和面部解剖学的发展，中面部年轻化手术也随之发生着演变：最初的面部除皱术只是单纯去除松弛的皮肤，但术后远期效果不理想；为获得更加持久的效果，到20世纪70年代开始了一系列面部提升术，包括：各种SMAS提升术、颧脂肪垫提升术，扩大的颈阔肌上面部提升术；到20世纪80年代后期，学者提出为获得和谐的面部容貌应进行骨膜下面部除皱术；而到21世纪初Little William提出了"青春曲线"的概念，并实施了容量雕刻技术，即三维中面部年轻化手术。

One important feature ofHamiltonian systems is that it has energy(its energic function is Hamiltonian func-tion),then,its solutions on 2-dimensional plane are some contour lines,the points onstable manifold emanating from hyperbolic equilibrium point have the same energyas that on unstable manifold,then,one can guess that they form a closed curve,i.e.homoclinic orbits under certain conditions,and the contour lines in the innerpart of homoclinic orbit are periodic orbits.

哈氏系统的一个重要特征是它有能量存在(以Hamiltonian函数作为它的能量)，那么在二维平面上，它的解表现为一些等值线，从双曲平衡点发出的稳定流形和不稳定流形上的点具有相同的能量，那么可以猜测，在一定条件下它们构成一条封闭的曲线，即同宿轨，而且其内部的等值线都是周期轨道。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了