有效数

With the increase of temperature, the relative intensity of each Doppler-free hyperfine spectroscopy has a trend of increase at the beginning, then decrease as the result of the influence of the effective atomic number density, Doppler-broadening and the susceptibility.

由于有效原子数密度、多普勒加宽、电极化率受温度变化的影响，每一条超精细谱线的相对强度随着温度的升高都会出现先增大后减小的变化趋势，相对强度最高时的温度称为最佳温度。

It is proved that this algorithm can produce test case of path coverage testing aut...

对含有非线性谓词、数组的程序实例进行实验，结果表明改进算法能有效生成测试用例。

Because the derivation of the extended system has a block lower triangular form, the method of splitting iteration is applied to compute simple bifurcation point, not only computational work is reduced, but also local quadratic convergence is achieved.

由于所构造的扩充系统的导数具有分块下三角形式，采用分块迭代的方法进行数值求解，不仅减少了计算量，而且是二次收敛的，从而为Navier-Stokes方程非退化简单分歧点的数值逼近提供了有效的算法。

Thus there has been an increased interest in studying theexistence and multiplicity of periodic boundary value problem.

因而受到人们广泛的关注，发展和解决这类问题的一些有效的方法如Lyapunov泛函方法，不动点和范数形式的锥拉伸锥压缩不动点定理等。

The main works are to extend the related conclusions of continuous time systems to discrete time systems and the determination of state reachable set when bounded control input set is used. The properties of system's incremental gain are studied next.

文中第一步先讨论了应用耗散系统基本理论来界定系统诱导范数的方法：给出了确定有效系统耗散函数的方法：主要工作体现在将连续系统的相关结论推广到了离散系统：以及有界控制输入时系统状态能达集的界定。

While effectively reducing the dimensions of the vector, this method remarkably increases the efficiency of analysis on ultrasound cardiogram.

这种方法有效降低了纹理特征向量的维数，显著提高了图像分析的效率。

This paper reveals the relationship between the parity of derivative function and the symmetry of the graph function, finding a effective way to judge whether the functional graph can have the axial symmetry or central symmetry.

揭示了函数导数的奇偶性与函数图像对称性的关系，发现了一种可以用来判定函数图像是否具有轴对称性或中心对称性的有效方法。

The characteristic of fractional order differential equation iscontaining the non-integer order derivative. It can effectively describe the memory andtransmissibility of many kinds of material, and plays an increasingly important role inengineering, physics, finance, hydrology and other fields.

分数阶微分方程的特点是含有非整数阶导数，能非常有效的描述各种各样的物质的记忆和遗传性质，在工程，物理，金融，水文等领域发挥越来越重要的作用。

The order analysis method was used,through a comprehensive comparison of complex determination coefficient and residual sum of squares,the optim...

采用逐阶分析方法，通过综合比较回归分析中的复测定系数、残差平方和等方法来确定最优的多项式的阶数，提高了几何误差模型的精确性和鲁棒性，从而使数控机床误差实时补偿更有效。

This paper proposes a flexible and reliable camera calibration of stereo vision measurement system based on unit quaternions with optical reference bar, which has three small collinear infrared LED feature points and the lengths between these feature points have been precisely calibrated.

提出了一种利用光学参考棒，基于单位四元数法的灵活、有效的立体视觉测量系统现场校准技术。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。