first derivative

英 [fɜːst dɪˈrɪvətɪv]

美 [fɜːrst dɪˈrɪvətɪv]

一阶导数

英英释义

noun

• the result of mathematical differentiation
  Synonym:derived functionderivativedifferential coefficientdifferential

双语例句

• Making use of the fourth-order compact difference formula of the first derivative term, anew high accuracy difference scheme for the two-dimensional convection reaction equation is proposed.
  利用一阶偏导数项的四阶紧致差分算子，直接推导出了数值求解二维对流反应方程的一种新的高精度紧致差分格式。
• The algorithm only calculated the first derivative, significantly reduced the computation and had a good convergence.
  并且该算法只需要计算一阶导数，极大地减少了计算量，且收敛性较好。
• 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。
• A first derivative spectrophotometric method is described for the determination of mixed colorants in banana type soft candies.
  本文提出以一阶导数分光光度法测定香蕉型软糖中的混合色素。
• Two-dimensional cubic Hermite interpolation method realizes the continuity of the first derivative and makes the result smooth.
  另一种方法是两维三次Hermite插值法，三次Hermite插值的优势在于它实现了插值结果一阶导数连续，使结果更加光滑。
• Determination of ampelopsin in teng cha extract by first derivative ratio fluorescence spectrometry Studies on Stability in Biological Medium and Preclinical Pharmacokinetic of Ampelopsin Sodium
  比值-导数荧光法测定藤茶中的蛇葡萄素蛇葡萄素钠在生物介质中稳定性及临床前药代动力学研究
• Identification of spillage oil at sea with first derivative fluorescence spectra was discussed.
  一阶导数荧光光谱鉴别海面溢油，其光谱特征用模糊数学方法作了分析；计算了各种油之间的模糊相似程度；
• The powder pharmaceutical samples of sulfaguanidine are analyzed nondestructive by conventional and first derivative near infrared diffuse reflectance spectra.
  用常规和一阶导数近红外漫反射光谱法非破坏分析了粉末药品磺胺脒。
• Method: To apply first derivative spectral.
  方法：采用一阶导数光谱法测定本制剂中丹皮酚的含量。
• I have here first the first derivative, x dot.
  首先，有一次导数，x点。