一阶导数

It is found that,in a first-order differential Raman spectrum,almost all noise peaks are confined within a narrow horizontal band-like region with the base line going through its middle,whereas thesignal peaks shoot up and down much far beyond the region.Based onthis property,a new peak searching method with the aid of first-order differentiation is suggested.In this paper,a R_spectrumpeak labelling program for SPEX 1403 laser spectrometer with DMIBcomputer is reported.The result of peak labelling sho...

作者提出了用一阶导数谱辅助求 Raman 光谱峰值的新方法，较好地解决了谱峰与噪音的识别问题；编制了 SPEX_(1403)激光 Raman 光谱的标峰程序，具有10种不同大小尺寸的绘图功能、9种不同的字号供标峰选用，操作分为自动、半自动和手动三种方式，具有用于图注、实验条件说明的打字，存、取及复制标峰谱图等功能，克服了一般标峰过程中常见的弊病，标峰效果满意。

Potassium Guaiacolsulfonate ; syrupus phenergani tussis ; first derivative spectrophotometry

愈创木酚磺酸钾；非那根止咳糖浆；一阶导数分光光度法

This thesis studies the analytical methods of determination of Leucogen and Hydroxymethylnicotinamide by Ultraviolet and Atomic Absorption Spectrscopy.

本文研究了分光光度法和原子吸收光谱法测定利血生及羟甲基烟酰胺的分析方法，提出了利血生的三种测定方法和羟甲基烟酰胺的一阶导数峰-零法的测定新方法，并用于实际样品的测定，获得满意结果。

His prospective father-in-law, however, reneged, perhaps making this not only the first derivative but the first default on a derivative.

他未来的岳父，但食言，也许这不仅使一阶导数，但第一次违约的衍生产品。

The results show that the calibration model established with firstderivative preprocessing spectra was the best, 18 samples of tested set were predicted with this model, the relative standard errors for the prediction of ami no nitrogen, total acid, salt content and color ratio were 1.516%, 1.811%, 1.798% and 1.893%, respectively.

结果表明，采用一阶导数预处理光谱建立的数学校正模型能得到最佳的预测效果，在对预测集18个样本中的氨基酸态氮、总酸、食盐的含量和色度进行预测时，所得的预测集相对标准偏差分别为1516%， 1811%， 1798%， 1893%。

Key words:Ofloxacin;Ear drop pills;Orthogonal test;The first order derivative spectorphotometry;PolyglycolPEG

关键词］氧氟沙星；耳用滴丸；正交实验；一阶导数光谱法；聚乙二醇PEG

In addition, the approach is able to avoid the requirement of the upper bound of the first time derivative of the control gain, which is assumed to be known a priori in some of the existing adaptive fuzzy/neural network control schemes.

该方案能够避免现有的一些自适应模糊/神经网络控制器设计中对控制增益一阶导数上界的要求。

In the case that the oscillation factor isn't sign reversal and neutral factor is p, by discussing the sign of the neutral term's first derivative and using Holder inequality the oscillation conditions of the all solutions of this kind of equation are studied, three sufficient theories that all solutions of the equation oscillate are obtained.

在振动因子q保号、中立型因子p的情况下，通过对中立型项一阶导数符号的讨论，根据Holder不等式，研究了该类方程的解振动的条件，得到了所研究方程所有解振动的三个充分性定理，所得结论是对该类问题已有结论的进一步完善和推广。

It is shown that it is difficulty to differentiate each vegetation type among sub-tropical evergreen forest, sub-tropical coniferous forest and sub-tropical deciduous forest because of the mixture of their tree spectra. According to the reflection index in the wavelengths of 750 nm to 1 100 nm, the tree species can be divided into 4 groups with descend in reflectivity. Each tree specie can be differentiated from each other according to its slope of the spectrum curve and its reflection index in the wavelengths of 770 nm to 1 010 nm for each forest vegetation type. The unique first order derivative feature can be used to identify litsea, alder, fir, red birch, southwest birch, large schima confertiflora, taiwania flousian and small leaf schima confertiflora.

研究表明：亚热带常绿阔叶林、亚热带针叶林和亚热带落叶阔叶林等植被类型，因其树种间光谱特征混淆严重，而难以彼此区分；根据其反射率在750~1 100 nm范围上的差异，可将其归为4类；就各植被类型而言，其树种间在光谱曲线坡度，以及在770~1 010 nm范围上具有显著差异，可据此将其区分；木姜子、桤木、杉木、红桦、大叶木荷、秃杉和小叶木荷等因具有独特的光谱一阶导数特征，据此可以识别提取。

But the errors with the Fourier transform method are -1062nT/m and 1442nT/m, there is large departure between the calculating curve and theoretical curve and evident influence by effective magnetic dip angle in computing.

而Fourier变换法计算的水平和垂向一阶导数最大误差分别为-1062 nT/m、1442 nT/m，计算曲线与理论曲线偏离大，受磁化倾角的影响也较大。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。