Yin YJ. Generalized covariant derivative with respect to time in flat space (I): euler description. Acta Mechanica Solid Sinica, 2016, 29(4): 345-358Yin YJ. Generalized covariant derivative with respect to time in flat space (II): lagrange description. Acta Mechanica Solid Sinica, 2016, 29...
Operators Involving a First Derivative with Respect to Time and Nonlocal Boundary Conditions 来自 国家科技图书文献中心 喜欢 0 阅读量: 34 作者: AA Dezin 摘要: We study an operator equation of the form du/dt-Au = f with boundary conditions relating values u(t) for t = 0 with the ...
I'm trying to solve some derivatives in matlab for my dynamic course. The problem is im a total noob to this program and i was wondering of some of you could help me out with this probaly simple problem. I would like to get the time derivative of x with respect to t (time) but x...
关于微积分的英语翻译Yet basic mathematics takes time as understood and develops the calculus around a particle whose position at time t is given by x(t), its velocity is dx/dt , the derivative of x(t) with respect to time, and its accelerat
asuch as math 例如算术[translate] aInstantaneous acceleration is the limit of the average acceleration as the time interval goes to zero. That is the derivative(导数) of the velocity with respect to time.) 正在翻译,请等待...[translate]...
Port_1—Approximation of continuous derivative for input signal with respect to time scalar | vector Parameters expand all To edit block parameters interactively, use theProperty Inspector. From the Simulink®Toolstrip, on theSimulationtab, in thePreparegallery, selectProperty Inspector. ...
OPM_THROW(std::runtime_error,"Cannot call muOil(): oil phase not present."); }constintn = cells.size(); assert(po.value().size() == n);constintnp = props_.numPhases(); Block z = Block::Zero(n, np);if(pu_.phase_used[Gas]) {// Faking a z with the right ratio:// rs...
I'm modeling with the PDE Coefficient Form Time-dependent analysis in 1D module two equations with two dependent variables. One of my boundary conditions is a derivative with respect to time (dh/dt|x=1 =constant). Is there anyway I can enter this boundary condition into my model?
After applying the fractional-order derivative with respect to the time parameter, the result becomes ωαcos(ωt+π2α) [30–33]. To better observe contributions of the derivative to the frequency component, one can perform phasor analysis for the interpretation of the dynamical fractional-...
但从实际应用情况来看,直接应用测试数据进行解释做出的压力导数曲线的中后期相当离散,从而对解释造成了相当大的困难。 2. An advanced algorithm to pressure derivative of discrete points is presented. 将Laplace正变换积分数值离散 ,再结合Stehfest数值反演 ,给出了一种改进的离散点压力导数计算方法。 3. The cal...