查询词典 algorithms

Based on this thought, in this thesis, the alternation theorem is first extended to the Chebyshev approximation problems with inequality constraints, and then two algorithms are devised for designing linear phase FIR filters with inequality constraints in Chebyshev sense according to the extended theorem.

L.J.Karam和McClellan在文献[20]中把交错点组定理扩展到复数域，并提出了求解复系数FIR滤波器的复Remez算法，但由于此扩展定理只是一个充分条件，所以此算法不能保证得到最优解。在文献[23]中，他们对复Remez算法进行了完善，使其收敛到最优解。

Introducing the user algorithm of the broadcast ephemeris, the algorithms are explained on principle, which are Lagrange Interplation and Chebyshev polynomial simulation. Then comparisons of calculating of satellite coordinate with broadcast ephemeris and with precise ephemeris are made.

推导了广播星历用户算法，对GPS数据处理中常用的拉格朗日内插和切比雪夫多项式拟合从原理上进行了阐述，并对广播星历卫星坐标计算和精密星历卫星坐标计算进行了分析比较。

According to the inner or outer tolerance the algorithms for maximizing the forward-step by maintaining a constant tolerance are provided by the chord line or tangent line respectively.

建立了复杂曲面球头铣刀三坐标数控加工刀位计算模型，根据正负允差的不同要求，分别给出了弦线法和切线法自适应步长的刀位点生成算法。

We proposed 8 types of algorithms, and the contrast of chromatic aberration is up to 25%~50%. All of the experimental results distinguish the content of the secret image easily.

本研究提出之 8 个模型，其明暗色差的对比度皆达25%~50%，可轻易且清楚地辨别出机密影像的内容。

A selection of the ciphering algorithm to be used is based on a BSS level system parameter, which determines the allowed algorithms and their fixed preference.

选择使用加密算法是建立在基站系统水平系统参数的基础上的，它决定了所允许算法和那些固定的优先选择。

MSC has although the possibility to indicate to the BSS all ciphering algorithms.

虽然移动交换中心有可能显示出基站系统所有的加密算法。

The feature enables the usage of different A5 algorithms (currently A5/1 and A5/2) and gives an alternative of using no ciphering at all (A5/0). A5/2 allows ciphering to be used in some market areas as in some areas the use of A5/1 is forbidden.

这功能使得不同的A5算法的应用（目前的A5/1和A5/2）得以实现，同时给没有使用任何加密（A5/0）提供了可供选择的办法。A5/2允许在某些市场区域中使用加密，因为在某些区域中，A5/1的使用是被禁止的。

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。

Then we propose some ways to improve circular orbit based Cone-Beam algorithms.

基于这一关系提出了改进算法的一些途径。

3D seismic migration algorithms of holding circular symmetry ;2. Assuming that the point spread function is circular symmetry and considering that the image is actually complex conjugate symmetry in frequency domain, authors establish a new cost function in frequency domain.

算法假设退化系统的点扩散函数具有圆对称性，并考虑图像的频域具有复共轭对称性，在频域里建立了新的优化判据；采用共轭梯度算法搜索判据，从而在有实际物理意义的区域中收敛于最优解；对光学成像系统常见的离焦、衍射模糊问题进行了仿真；用该算法实现了其退化图像的恢复，给出并分析了结果。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。