查询词典 contour profile

The characters of linear complexity profile of periodic sequences are investigat- ed. The relation between the continued fraction expansion of rational function and its 1- inear complexity profile is established. The expression of linear complexity profite is gi-~~en and a condition estimating the randomness of a sequence is presented. By the linear complexity profile, the bound of sphere complexity is proposed. A formula to record the number of sequences with given linear complexity profile is presented.

研究了周期序列的线性复杂度曲线特性，在周期序列生成函数的连分式展开式与线性复杂度曲线之间建立联系，给出了周期序列线性复杂度曲线的表达式；给出了判断序列随机性好坏的一个条件；利用线性复杂度曲线特性给出周期序列球体复杂度的一个估计；给出了具有给定线性复杂度曲线的序列个数的一个计数公式。

Firstly, a new design method of cam profile has been developed by using finite terms of Fourier Series in the cycle of cam angle as the basic equation of cam profile, so the difficulty of base circle wave existing in the method of resonant cam design can be eliminated. On the other hand, the method proceeds from the acceleration of cam profile, which makes the acceleration not only smooth and continuous, but also easy to be controlled, and the cam profile with good performance can easily be acquired.

此方法用以凸轮包角为周期的富立叶级数有限项作为凸轮型线的基函数，可以免去谐波凸轮设计时控制基圆波动的困难；此方法又是从凸轮型线的加速度曲线入手进行设计，使型线加速度不但光滑、连续，而且形状容易控制，便于设计出动力性能优良的凸轮型线。

Result The skewed parabolic profile is observed in CCA under 1:60 curvature and physiological average Reynolds number. As curvature and Reynolds number increase, the middle of horizontal profile appears sunken and the vertical profile is M-shaped. There are different profile shapes in different localities along the curved pipe.

结果 当颈总动脉的曲率等于1：60 时，在人生理平均流动雷诺数条件下，颈总动脉的速度剖面可用偏斜的抛物面来近似；当颈总动脉曲率增大或流动雷诺数增大时，弯曲平面上的速度剖面中部出现下凹趋势，垂直方向上出现M型速度剖面；沿管轴不同位置上的速度剖面形状不同。

The author analyzed the rotor profile according to profile designing principle, selected one-sided asymmetric cycloid (gear/pin arc-shaped profile) as model, and completed rotor profile calculation under given parameters.

依据型线设计原则，进行转子型线分析，具体选择转子型线类型为单边不对称摆线—销齿圆弧型线，完成给定参数下的转子型线计算。

According to the character of highway profile design, this paper repositions the role of the optimization design of profile and builds the optimization design models and solves the problems of profile optimization design successfully with genetic algorithm, owing to the fact that highway design need repeatedly modification, this paper also establishes the self-adaption modification models of plane and profile design.

根据纵断面设计的特点，重新定位了纵断面优化设计的地位，建立了纵断面优化设计模型，并应用遗传算法圆满解决了纵断面优化设计问题。针对公路设计需要反复修改的特点，建立了平纵面自适应修改模型。

A typical profile of Daqiao peatland in the Changbaishan Mountains is chosen for this study. The vertical distribution of major and selected trace elements in the sediments of the profile was determined. Its implications for the climatic change in the Holocene are discussed. The profile was compared with another standard profile named Jinchuan in this area.

本文选择长白山地区典型的泥炭剖面－大桥剖面，探讨其沉积物常量元素和微量元素的垂直分布规律及其对全新世气候变化的指示作用，并与该区另一代表剖面－金川泥炭剖面进行对比。

An optical system with refraction and total internal reflection was proposed according to the luminous characteristic of LED and the law of energy conservation. The ordinary differential equations satisfying the spots on the contour curve of TIR refractive and reflective planes were established. The coordinates of points on profile curves were obtained by solving these ordinary differential equations using Runge-Kutta method. The profile curves were acquired by curve fitting of the coordinate spots with software UG, and then TIR model of the projector and data of the surface shape suitable for NC manufacture were obtained.

根据LED的发光特性以及能量守恒定律选择采用折射全反射光学系统，通过建立TIR折射面及全反射面轮廓曲线上的点所满足的常微分方程，利用RungeKutta求解常微分方程得到轮廓曲线上点的坐标，再在UG中对坐标点进行曲线拟合得到轮廓曲线，进而得到TIR模型及适合数控加工的面形数据。

The research of beam instability on ring can be conducted according to the change of the cross section of beam profile and the movement of beam profile position obtained from beam profile monitoring system.

从束流截面大小的变化和束斑位置的移动规律，可以进行环上的束流不稳定性的研究。

Several crite- rions are presented relying on all possible instances for third-order profile planning. Based on these criteria and dynamic constraints, fast and accurate algorithm of profile planning with time-optimality by preprocessing the entire profile as a whole is described. Ac- curacy losses in discrete time implementation are considered.

这类运动对精度和效率的要求极高，甚至要求纳米级精度，而轨迹规划是超精密运动的重点和难点之一，其轨迹规划精度直接决定了运动精度和性能，因此，与此相适应的快速精确的轨迹规划算法成为了现代超精密运动系统必须解决的问题，是提高竞争力的必要手段。

PDC bit crown profile, consisting of single circular arc parabola profile or dual cone profile with deeper inner taper is introduced. Cutter arrangement for various bits is determined. The bit is improved by the application of hybrid cutting structure and detailed analysis of hydraulic structure. Simultaneously, bit stability is enhanced using multiple bit stable structure design techniques such as deep inner taper, force balance and hybrid cutter arrangement etc.

提出了以单圆弧抛物线形轮廓或双锥轮廓配以较深的内锥组成PDC钻头的冠部轮廓，确定了各种钻头切削齿的分布密度，应用了各类切削齿混合设计切削结构，对PDC钻头的水力结构做了详细分析研究；同时，结合深内锥、力平衡、混合布齿等多种钻头稳定性结构设计技术，以增加钻头稳定性。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。