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- Several kinds of powdered milk were identified fast and nondestructively by Fourier transform infrared spectroscopy (FTIR) combined with second derivative spectra. 采用红外光谱法(FTIR)并结合二阶导数谱对几种奶粉产品进行了无损快速鉴别。
- We applied ATR Fourier Transform Infrared(FTIR) spectra and second derivative spectra to analyze the alcoholicity and content of sugar of red wines produced by different manufacturers for the first time. 首次采用衰减全反射(HATR附件)傅里叶变换红外光谱法并结合二级导数谱对市售的若干种不同厂家葡萄酒的酒精含量和糖含量进行了快速无损分析。
- Keywords nickel;dimethylglyoxime;second derivative spectrum;peak area spectrophotometry;gum arabic; 镍;丁二酮肟;二阶导数光谱;峰面积光度法;阿拉伯胶;
- Keywords Second derivative spectrum;Peak area spectrophotometry;Aloe;Iron;Copper;Cobalt;1;10-Phenanthroline; 二阶导数光谱;峰面积积分光度法;芦荟;铁;铜;钴;1;10-邻菲罗啉;
- Application of second derivative spectrum prepares in quantification measuring glucose-6-phosphate and fructose-6-phosphate using a FTIR/ATR method 二阶导数光谱预处理在用FTIR/ATR方法定量测定葡萄糖-6-磷酸和果糖-6-磷酸中的应用
- second derivative spectra 二阶导数光谱
- Second derivative spectrum 二阶导数光谱
- Results Obvious differences exist in the ultraviolet spectra and derivative spectra of the Hongqu produced with different species. 结果：不同种红曲霉制备的红曲的紫外光谱及其导数光谱存在明显差异。
- In this method, the propranolol were extracted by GDX403 resin and eluted by methanol.The content of propranolol were obtained by determing UV 2nd derivative spectra of elutent. 肝中心得安用GDX403树脂吸附然后用甲醇洗脱,用二阶紫外导数光谱测定心得安的含量。
- The function (f')is usually written simply f" and is called the second derivative. 函数（f’）通常简写成f”，并称之为f的二阶导数。
- The second derivative of LNA, DHA is the most prevalent fat in the brain and nervous system. DHA是由LNA转化的另一种衍生物，人体脑部和神经系统都含大量DHA。
- D by using the first derivative spectrum and REP, and the properest models were index(R2=0.9487)and parabola (R2=0.9392) respectively. D 是可行的;最适模型分别为指数(R2=0.;9487)和抛物线(R2=0
- Quinestrol in compound preparation was determined directly by using second derivative spe ctrometry. 采用二阶导数分光光度法对炔诺孕酮炔雌醚片中炔雌醚的含量进行了测定；
- The first derivative spectrum is more correlatively with the biophysical parameter including chlorophyll density and LAI. 综合分析，孕穗期是利用高光谱遥感进行作物长势和养分诊断研究的最佳时期。
- Be able to apply the first and second derivative tests to analyze the monotonicity and concavity of a function. 能应用导数判定函数的单调性与凹性并利用渐近线协助绘制函数图形。
- The computation precision can be enhanced with the consideration of second deriv ative. 计算结果表明，考虑二阶导数的影响，可以提高计算精度。
- The second-class derivative spectrum method was u sed to determine the amygdalin contents of Prunus persica(L .) Batsch. from three different areas (Fujian, Anhui, Xinjiang). 采用二阶导数光谱法直接测定三种不同产地(福建、安徽、新疆)桃仁中苦杏仁甙的含量。
- It is computationally expensive and impossible to use optimization means which should compute gradient and Hesse matrix,and the second derivative. 涉及到的求导计算太繁琐,并且需要计算目标函数的二阶导数,所以对这类问题采用含计算梯度或海森矩阵的优化方法是不可行的。
- The determination of clobetasol propionate by the method of second derivative linear sweep adsorptive stripping voltammetry was reported. 本文报道了丙酸氯倍他索的二次导数线性扫描吸附溶出伏安法测定。
- A piece-wise multiple regression procedure was used to generate multivariate linear equations for predicting TC,TN and TP using the original,and the derivative spectra of CASI data. 利用CASI原始光谱、一阶和二阶微分光谱数据和逐步回归分析来预测TC、TN和TP。
