That's the first derivative of the position versus time.
它就是位置，对时间的一阶导数。
The 2d series expansion algorithm of vertical first derivative of gravity is briefly stated in this paper.
本文介绍了二度空间重力垂直一次导数的级数展开计算法。
OBJECTIVE a method of first derivative UV spectrophotometry for growth hormone in PLGA microspheres was described.
目的建立一种一阶导数紫外分光光度法测定plga微球内生长激素含量的方法。
Using a compressibility coordinate transformation, a set of the first derivative differential equations has been derived.
采用了压缩性的坐标变换后，推导得到了五个一阶导数的微分方程组。
The original spectrum is processed by using first derivative, and applying Partial Least-Squares method to set up linear mathematical model.
采用一阶导数方法对光谱进行预处理；利用偏最小二乘法建立模型。
The reversion of the vertical first derivative of gravity can improve interpretation accuracy and is useful for researching into bedrock structure.
用重力垂直一次导数来进行反演可提高解释精度，还可以用来研究基岩结构。
It is shown that the wavelength modulated reflective spectrum is essentially the first derivative of dielectric function with respect to the energy.
分析表明波长调制反射谱的实质，是介电函数对能量的一级微商。
It is shown that the first derivative of the corresponding collocation solution admits, under suitable assumptions, a precise error expansion at the knots.
在适当条件下，获得了配置解的导数在结点集上成立的精细误差展开式。
The OTF (Optical Transfer Function) of an optical system can be evaluated by the Fourier Transform of the first derivative of the optical image of an knife-edge (object).
对光学系统输出刀口像的一阶导数做傅里叶变换，可以得到该系统的光学传递函数（OTF）。
Spectra of 700 typical samples were collected to develop the calibration models, among which the raw spectra were pretreated with first derivative and partial least square.
收集700个具有代表性样品的光谱，建立其相应指标的近红外模型。
The checks by the vertical first derivative and second derivative anomalies reduced to the pole show good coincidence, which proves the reliability of the shallow layer anomaly.
经过化极垂向一次导数和垂向二次导数的验证，吻合很好，说明浅部异常的可信度高。
The MLR mathematical model that established with orthogonal signal correction plus first derivative and mean centre preprocessed spectra shows the best result for glucose and fructose.
研究结果表明，原始光谱经均值中心化、一阶微分和正交信号校正预处理后，运用多元线性回归法所建葡萄糖和果糖定量分析模型最优。
Continuity on first derivative of wave function is discussed by means of several instances of finite and infinite transitions of potential function and hereby continuity conditions is pinpointed.
结合势函数有限跃变和无限跃变的几种实例，讨论波函数一阶导数在势函数跃变处的连续性问题，从而进一步明确连续性条件。
Methods First derivative spectrophotometry was used.
方法一阶导数分光光度法。
Method: First derivative spectrophotometry was used.
方法：用一阶导数光谱法测定。
Method: First derivative spectrophotometry was used.
方法：用一阶导数光谱法测定。
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