z n. (pl. Z's, z's ) 1.英语字母表第二十六个字母。 2.【数学】第三个未知数;(中世纪罗马数字的)2000。 3.Z字形物。 from A to Z 从头到尾,自始自终。 Z Day 会议闭幕日。 Z = 1.Zenith distance 【天文学】天顶距。 2.atomic number 【化学】原子序(数)。 3.【物理学】 impedance 阻抗。
Finally , the wall response factors are obtained simply by applying inverse laplace transforms on the polynomial s - transfer function , and conduction transfer function coefficients are obtained by applying z - transforms 在多项式s -传递函数基础上进一步计算墙体的反应系数、导热z传递函数系数和周期反应系数。
On the basis of simulative theory , the achievements of some mathematic models about prime movers having been synthesized , the difference equations with which the computer can cope are obtained by using mathematic tools such as laplace - transform and inverse z - transform . according to the function of the system , the hardware and software design , which takes 80c196kc as cpu , are elaborated . further more , the methods will improve the system ' s reliability by hardware and software 在此基础上,综合了原动机仿真系统数学模型的已有成果,并运用拉氏变换、逆z变换等数学工具,以仿真原理为依据,求取了便于计算机进行数值运算的差分方程。最后,根据仿真系统的具体功能,以80c196kc单片机作为控制核心,对原动机仿真系统的硬件和软件设计做了详细的介绍,并力求通过从硬件和软件设计两方面来提高控制系统的可靠性。
Based on the unified recursive formula , the four algorithms included in this study are the central difference method , the newrnark ' s method , z - transform method , and duhamel ' s step integral method . the accuracy , the phase and other existent problem are studied in this paper . it is proved in this paper that the recursive parameters b1and b2are relate to the poles of theoretical transfer function 分析中可以发现,中心差分方法, newmark中点加速度方法、 z变换方法及duhamel逐步积分法在精度范围内其计算相位是没有畸变的,中国地震局工程力学研究所顷土学位论文一但是中心差分方法, newmark中点加速度方法随着采样间隔及系统自振频率的增大,系统的固有自振周期被改变,其传递函数的共振区域与理论传递函数的共振区域会发生分离。
百科解释
In mathematics and signal processing, the Z-transform converts a discrete time-domain signal, which is a sequence of real or complex numbers, into a complex frequency-domain representation.