这意味着，沿一条闭合曲线，势函数的变化量是。
That means when you go along a closed curve, 0 well, the change of value of a potential should be zero.
如果我们想更加精确一点，我们知道当t变化的时候，乘以导数就出现了，well, t, times, the, derivative, comes, in，这是函数变化量的线性近似。
If we want to be a bit more precise, we know that when we change by t, t that's for linear approximation to how the function changes.
好，既然我们已经知道点的位置，它是一个关于时间的函数，我们就能了解，它在诸如速率或加速度的量中是如何变化的。
OK, so, now that we know the position of the point as a function of time, we can try to study how it varies in particular things like the speed and acceleration.
通过调整超结构光栅各参数诸如：光栅长度、折射率平均变化量、变迹函数等，从而可获得理想的反射谱特性。
Through adjusting involved parameters such as wavelength, refractive index average variation value, anodized function, ideal spectral characterizations are obtained.
通过此函数关系可计算任意电阻变化量的分散性，进一步求得实验值的可靠性。
We can calculate the dispersibility of resistance change and get the reliability values of experiment by the fitting curve.
考虑到超短期负荷预测偏差的情况下，以购电费用变化量最小为目标函数重新调整发电计划，从而导致电网可用输电能力(atc)发生变化。
Because of super short-term load forecast error, ATC is changing with the adjustment of the generation scheduling by the object function that purchasing charge is least.
给出了一个形式简洁的方位随时间线性变化的可量测函数，并利用工作点漂移的技术解决了滤波器在方位小变化量时系统的不稳定现象。
In this paper, a linear function of bearing variation versus time is given, and the method of work-point drifting are used to solve filter system which is unstable in bearing small change.
通过计算发电机转速和无功补偿节点电压变化量对各控制器参数的轨迹灵敏度，获得目标函数对各控制器参数的梯度，以便于用共轭梯度法寻找最优解。
Trajectory sensitivity approach is used to assess the gradient of the PSS and SVC parameters on the objective function and then conjugate gradient approach is applied to find the optimum solution.
本文从降雨入渗滞后补给的宏观机理出发，提出了一种简单而又可靠的数学方法来建立滞后补给量随时间变化的函数表达式。
Based on delayed recharge macroscopic mechanism of rainfall infiltrating, this paper proposes a simple and reliable mathematical method to build up the relation of delayed recharge rate with time.
在求解迭代过程中，以残差变化量作为加速因子，修正权函数，减少了迭代次数，加快了算法的计算速度。
During the solution iterations, the residual change is used as accelerating factor to revise weight function. As a result, the number of iteration and the calculation time are decreased.
然后对室内机全工况数据进行分析，利用最小二乘法拟合了制冷量随工况变化的函数。
Secondly, according to the data in all condition, the lease square method is used to obtain the function indicated the change of refrigerating capacity associated with various conditions.
库存费的变化率为存贮量的函数，讨论模型解的存在性和唯一性，找到了最优存贮策略。
The existence and uniqueness of the models are discussed, and optimal inventory policies are found.
通过对等速直航目标的方位随时间变化规律的研究，找到了一个形式简洁的方位随时间线性变化的可量测函数。
By studying the regulation of the target bearings varying with time, a concise linear measurable function of bearing varying with time is given.
通过对等速直航目标的方位随时间变化规律的研究，找到了一个形式简洁的方位随时间线性变化的可量测函数。
By studying the regulation of the target bearings varying with time, a concise linear measurable function of bearing varying with time is given.
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