查询词典 periodic function

One, the physical quantity that the fundamental point that the physical quantity that describes mechanical vibration and mechanical wave is proposition of the university entrance exam describes physical quantity of simple harmonic motion to the; such as amplitude, periodic, frequency, speed, acceleration, phasic, phasic difference describes mechanical wave has amplitude, wavelengh, velocity of wave, periodic, frequency to wait.

一、描述机械振动和机械波的物理量是高考命题的基础点描述简谐运动物理量有振幅、周期、频率、速度、加速度、相位、相位差等；描述机械波的物理量有振幅、波长、波速、周期、频率等。

Sc, there are two kinds of isotopes shaped body, the structure is trigonal system and the hexagonal Department, is found in the periodic table predicted decades before the first one confirmed the correctness of the periodic table of elements, which is very famous.

周期表中ⅢB族有银白色金属光泽的固体金属过渡元素，又属稀土元素，原子序数Z＝21，原子量4959，化学符F号Sc，有两种同位素异形体，结构正方晶系和六角晶系，是周期表预言十年后才发现的第一个证实周期表正确性的元素，因而很有名气。

In §3, the sufficient conditions under which the homogeneous linear differential equation with periodic confficients possess nontrivial periodic solutions a...

最后还讨论了当系数为周期函数时方程存在周期解的条件。

The condition for the existence of positive elliptic periodic solution was found using Floquet theory; and the theorem of the existence of positive elliptic periodic solution was proved by the method of upper and lower solutions and homotopy invariance theory of topology degree; then an example was given.

利用Floquet理论得到了该方程的正椭圆周期解存在的条件；然后利用上下解方法和拓扑度的同伦不变性理论，证明了该模型正椭圆周期解的存在性定理，并进行了实例验证。

Dynamical behaviors such as periodic, quasi-periodic and chaotic waveforms are observed on oscilloscope. It is expected that the proposed chaotic sources and their circuit implementations are beneficial to the application of neural networks. 4 A template of Cellular Neural Network is derived aimed at solving second-order hyperbolic wave equations based on space discrete method, a novel alternating recursive algorithm implementation is given.

提出了采用复数神经网络进行FIR滤波器设计的方法，利用复数信号能够同时携带幅度和相位信息的特点，构造了相应的具有复数的状态、偏置输入、输出、网络联接权的复数神经网络，证明了算法的收敛性，给出了网络的电路实现图，这方面工作对于拓展神经网络算法的应用范围和寻求FIR滤波器的设计新方法是有益的。

Through experimental researches, a result is obtained, which is that the periodic variation of water injectivity index is consistent with the periodic variation of injection water quantity in Shengtuo oilfield.

通过试验研究，得出胜坨油田吸水指数的阶段性变化与注水水质的阶段性变化一致的规律。

Software Description: About Integral Scientist Periodic Table, This is a periodic table for professional chemists, educators and students.

Integral Scientist Periodic Table 这是专业的化学家，教育家和学生的元素周期表。

Some conditions for weakly Persistence and extinction are obtained;In the second part, we respectively use C_h space and C_g space theorem to study the existence of periodic solutions of Lotka-Volterra equation with infinite delay, in the end we get the condition of the existense of periodic solutions and estimate the interzone of it.

第二部分利用相空间理论，分别以C_h空间和C_g空间为相空间研究了具有无限时滞的Lotka-Volterra方程周期解的存在性问题，给出了周期解存在的充分条件，并估计出了周期解的存在区间。

The property of translate invariant transformation in randomly-perturbed periodic structure is widely extended, owing to the demonstration of its origin from the spectral periodicity of the periodic structure.

4指出无序扰动周期结构中关于局域长度的平移等价变换是扰动前周期结构光谱周期性的结果，从而将该变换推广到所有厚度无序扰动的周期结构。

Consisting of the protracting graph of hydrogen-like atom"s angle distributing, computer simulation of the symmetry of molecular orbital and chemical reaction mechanism, showing the molecular point group and symmetry element, computer simulation of molecular vibration, Bravias"s crystal lattice and their transforming, extracting of plane periodic lattice, extracting of solid periodic lattice, close packing of isometrical pellet and the structure of simple mental substance, close packing of unequal pellet and crystal structure of representative ionic crystal, Computer Simulation of Phase Analysis by X-ray Diffraction.

内容包括类氢原子角度分布图的绘制，分子轨道对称性和反应机理的微机模拟，分子点群和对称元素显示，分子振动运动的微机模拟，布拉维晶格和晶格转化，平面点阵抽取，立体点阵抽取，等径网球的密堆积和金属单质结构，不等径圆球密堆积和典型离子晶体结构，X射线多晶衍射的微机模拟十个子模块。

Putt your way through 36 fun-filled holes of minigolf on 3D designed courses with elevated greens, bunkers, bridges and water hazards, among other crazy obstacles.

您的推杆方式，通过36个有趣的填孔迷你的三维设计的课程，以提升绿党，掩体，桥梁和水的危害，除其他疯狂的障碍。

Some participles can be used either as attributes or as predicatives.

有些分词既可当定语用，也可当表语用。