first derivative

1. 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。
2. And that is a point where the first derivative is zero.
   这点的导数为零。
3. And this, you will recognize is the first derivative of velocity versus time which is also the second derivative of position versus time.
   这点想必诸位已经了然于胸，它就是速度对，时间的一阶导数，也是位置对，时间的二阶导。
4. So the slope of the guess is the first derivative.
   因此斜率等于此处的一阶导数。
5. The interference from background of biological materials was partially eliminated and analytical process simplified was made by using UV first derivative spectroscopy.
   用紫外一阶导数光谱法，消除生物样品的背景干扰，简化分析过程，建立了安定血药浓度的测定方法。
6. 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
7. She was breathing weakly. Convergence of Chebyshev method under mild differentiability conditions of the first derivative
   嘴里的呼吸只有微弱地吐出。弱一阶可微条件下Chebyshev迭代法的收敛性
8. That's the first derivative of that position here.
   是这里的，一阶导数。
9. The solution and positive solution are considered for a class of second-order quasilinear equations with first derivative, where the nonlinear term is allowed to be singular.
   考察了一类含有一阶导数的二阶拟线性方程的解和正解，其中允许非线性项是奇异的。
10. That's the first derivative of the position versus time.
    它就是位置，对时间的一阶导数。
11. Used distilled water as medium and determined the dissolution of captopril tablet by the first derivative spectrophotometry;
    水，用一阶导数光谱法测定卡托普利的溶出度；
12. Study on the determination of tung oil adulterated in vegetable oils by first derivative spectrophotometry
    一阶导数光谱法测定食用植物油中桐油掺混的研究
13. The first derivative of their regard for us is positive. Okay?
    他们对我们态度的转变首先是积极的，，对吧？
14. The first derivative ratio spectrometry was used for the determination of the procaine hydrochloride injection.
    盐酸普鲁卡因注射液是临床常用的局麻药。
15. The first derivative is more important than just the position of their regard for us, getting better and better.
    态度的改观，比一开始对我们的看法更为重要，会越来越好。
16. I have here first the first derivative, x dot.
    首先，有一次导数，x点。
17. And I can take now the first derivative of this.
    现在得到第一个推导式。
18. Phenol and hydroquinone are directly determined at an acidity of pH ≤ 7 by the first derivative UV spectrophotometry.
    采用一阶导数紫外吸光光度法在pH≤7时直接同时测定苯酚和对苯二酚。
19. 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。
20. The first derivative high-speed pulse polarography was used forthe quantitative analysis of procaine hydrochloride and its injection.
    研究了一阶导数高速脉冲极谱法，并运用于盐酸普鲁卡因及其注射制剂的定量分析。
21. 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。
22. 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；
23. The first derivative differential pulse polarography was used for the quantitative analysis of Vitamin C and its preparations.
    本文建立了维生素C及其制剂的一阶导数差示脉冲极谱定量分析方法。
24. METHODS: The method of first derivative UV spectrum was established and compared with HPLC assay.
    方法：采用一阶导数紫外光谱法，并与高效液相色谱法（HPLC）进行了比较。
25. 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。
26. The doxycycline hydrochloride and its preparations were determinated by first derivative differential pulse polarography.
    建立了盐酸多西环素及制剂的一阶导数差示脉冲极谱测定法。
27. Methods: First derivative spectrophotometry was used.
    方法：一阶导数分光光度法。
28. 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。
29. 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。
30. 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。

noun

1. the result of mathematical differentiation

   Synonym:    derived functionderivativedifferential coefficientdifferential