正确性

In this paper,the B-spline curve is supposed as boundary curves,when they are in two paralled plane and two arbitrary plane,the condition about the control vertex of characteristic polygon when the ruled surface is developable are gained,solved the designing problem of degree and degree B-spline curve .Throughing (2,3) degree and (2,2) degree B-spline ,we haveproved the validity and utility of this method.

本文用两条B样条曲线作边界曲线，当它们位于两平行平面上和两任意平面上时，研究得到了由它们形成的直纹面为可展面时它们的特征多边形顶点满足的条件，解决了(n，n+1)次和次可展B样条曲面的设计问题，然后以(2，3)次和(2，2)次B样条曲面为构造实例，证明了该算法的正确性和实用性。

In view of urban water consumption's being affected by many factors and its systemic stability and non-linear characteristic,a non-linear time series forecasting method is studied in this paper based on neural network,and it was used to predict the water consumption for Zhengzhou city to verify its accuracy and rationality.

考虑城市用水量受众多因素影响，具有系统稳定性和非线性的特点，探讨了基于神经网络的城市用水量预测的非线性时间序列递推预测方法，并利用该方法对郑州市城市用水量进行了时间序列模拟，实例证明了该方法的正确性和科学性。

The according mathematics model and formula of characteristic value and inherent frequency were inferred and established.

固有频率的计算公式，并用实际算例对力学模型的合理性和数学模型的正确性进行了验

In order to improve the validity of identifi cation of digital image origin and predetermine accurately threshold of identification,a new probability density function of generalized chi square distribution is constructed within0,1 for asymmetrical distribution of noise correlation.

为了提高鉴别数字图像来源的正确性，正确设置判别阈值，针对噪声相关性的非对称分布，在0，1区间构造了一个广义chi平方分布的新函数，并提出了一种利用广义chi平方分布来描述噪声相关性的非对称分布和利用广义高斯分布来描述噪声相关性的对称分布的新方法。

The combination of 2DUS and CDFI may obviously improve the accuracy of diagnosis and differentiation of retinoblastoma and melanoma of choroid.

2DUS和CDFI检查相结合，能提高超声诊断及鉴别视网膜母细胞瘤和脉络膜黑色素瘤的正确性。

This indicates that the MEI for 2D circular conducting cylinder is much more ill than that of rectangular case. This conclusion is very useful in engineering application.

文中为了验证条件数结果的正确性，将用FORTRAN 程序计算的数据同用MATLAB计算的结果进行了比较，结果是一致的。

By analytic geometry method and solving quadratic equation,a computer simulation algorithm of digital projection under arbitrary scanning locus was proposed.The algorithm is based on the rules of attenuation of monochromatic X-rays.Through mathematical modeling and computer simulation,digital projections of ellipsoid and cylinder in circular and helix scanning modes are exemplified respectively,which are proved to be correct by FDK and PI-line reconstruction algorithms.

介绍了一种利用解析几何和求解二次方程仿真任意扫描轨迹下的锥束射线投影数据算法，该方法基于单色射线贯穿物体的衰减理论，通过数学建模与计算机仿真，给出了椭球、圆柱两种典型模型分别在单圆、螺旋线扫描轨迹下的投影数据仿真结果，并利用FDK和PI线重建算法进行验证，证明了该种数值仿真方法的正确性。

The main evidence for the validity of nucleation theory rests on its ability to predict closely the critical supersaturation for most liquids in cloud chamber experiments.

成核理论正确性的主要证据在于它能在云室实验中精密地预测多数液体的临界过饱和度。

This procedure has been confirmed feasible and accurate by examples, then analyses and calculates the homogeneous and unhomogeneous earth rock-fill dam, isotropic and anisotropic earth rock-fill dam, Yanji earth rock-fill dam with clunch core. The results by ANSYS is compared with the results by other seepage soft, which is quite similar and prove ANSYS practicability for calculating seepage field.

通过算例验证了该程序的可行性和正确性，接着对均质和非均质，各向同性和各向异性的土石坝以及烟集粘土心墙土石坝进行分析计算，并和其它渗流软件相互比较，结果较为相近，证明了ANSYS计算渗流场的实用性。

The simulation technique for CMG system is studied and corresponding physical simulation scheme is introduced, which is very significant in validating the theory based on and the engineering application of CMG.

论文还对控制力矩陀螺系统仿真技术进行了研究，给出了物理仿真的方案，这对验证理论工作的正确性和工程应用都是有着非常重要的作用。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。