基本曲线

Secondly, it analyses the line type between stator and rotor of PDM, gets its derivation bone line equation that satisfies the motor conjugate line type of theoretical sealing and the equation of curved surface, and determines its basic processing method and technology according to the line type characteristic of the spiral curve through analyzing some kinds of typical spiral curve processing methods.

其次，对螺杆钻具定子与转子进行线型分析，推导出其满足理论密封性的马达共轭线型的骨线方程和曲面方程，根据螺杆钻具定子内孔螺旋曲线的线型特点，在分析了几种典型的加工螺旋曲线加工方法的基础上，确定了其基本的加工方法和工艺。

This method can guarantee continuity and one-order smoothness of the estimated failure rate curve.

基本思路是：对那些寿终时刻，分别用单位时间内的失效频率做为失效率的估计，然后用二次样条函数来拟合出失效率曲线，这种处理可保证失效率曲线的连续性与一次光滑。

How to interpolate a sequence of given points with a C2 monotonicity preserving cubic spline curve is a basic problem in curve surface modeling techniques.

如何使得曲线在插值给定单调点列的同时，也保证自身的单调性是曲线曲面造型中的一个基本问题。

A compact representation of the domain parameters of HCC is presented, and the equation of hyperelliptic curves over finite field is shortened.

给出了超椭圆曲线密码体制的基本参数的一个紧致表示，对有限域上超椭圆曲线的方程给出了一个更简短的表达形式。

Based on this analysis, a new method for evaluating the bluntness magnitude of a Berkovich indenter was proposed. This method was examined by the experimental results of indention loading curves for pure nickel and aluminum alloy 8009, and good agreement was obtained. For thin metal films deposited on hard substrate, a method is established for determining the yield strength and hardening index of the film from nanoindentation loading curve.

通过对理想与钝化Berkovich压头以及球形压头纳米压入软膜/硬基材料加载过程的数值研究，给出了两种压头纳米压入加载曲线的幂函数拟合指数及最大压入载荷同膜、基材料基本力学性能间的函数关系，并分别就Berkovich压头与球形压头建立了由纳米压入加载曲线确定沉积在陶瓷基体上金属薄膜屈服强度与硬化指数的方法。

In specific applications expression : in compressed natural language describes various examples of the basic algorithm, using MATLAB as a programming language, a series of the combined limit, the bonus points will be combined, one graphics area and the length of the horizontal curve equations, and curve tangent process, the rotary body size and shape combined several process issues.

在具体应用中的体现：以简练的自然语言描述了各实例的基本算法，运用MATLAB作为编程语言，实现了数列极限的求解、定积分的求解、平面图形面积及平面曲线长度的求解、求曲线切线的过程、旋转体体积的求解及其形成过程等几个问题。

Traffic - lift characteristics of the centrifugal pump it is the basic performance curve.

、流量—扬程特性曲线它是离心泵的基本的性能曲线。

Result The population and new case of malaria can be predicted by the quadratic forecast model of population and logarithmic curve model of new case in Chongqing municipal. The prediction range of population is from 3113112 to 3368928, and the range of the new cases rate of incidence of malaria is from 126 to 134 in 2002 year. These two numbers are consistent with actual number of population and new cases, which are 31309038 and 130, respectively.

结果 重庆市人口数的二次曲线模型和疟疾新发病例的对数曲线模型能够对重庆市人口数和疟疾新发病例数进行预测，2002年重庆市人口数预测范围为3113112~3368928人，新发病例数范围为126~134例；分别与实际的人口数（31309038人）和病例数（130例）基本吻合。

In optimum operating condition, the maximum variation of computational head compared with experimental one is 2.52%, and averaged absolute variation is 4.5%.

CFD计算的曲线与试验曲线的趋势基本一致，最优工况点计算扬程相对试验扬程的最大误差为2.52%，误差绝对值的平均值为4.5%。

The content curve of terrigenous clasts (grain-size 3~5μm) is parallel to the oxygen isotope curve and mainly controlled by sea level change, which can be used as an indirect index for sea-level changing.

粒度分析显示，3~5μm组分含量曲线的变化与氧同位素曲线基本平行，说明它主要受海平面升降变化控制，可作为海平面变化的间接指标。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。