查询词典 sample method

High performance liquid chromatography-photodiode array detection-elctrospray ionization mass spectrometry (HPLC-PAD-ESI-MS) method was used to determine secoisolariciresinol diglucoside qualitatively and quantitatively. Precision, stability, limits of quantification, SDG recovery and sample preparation method were studied.

采用高效液相色谱－二极管阵列检测－电喷雾质谱(HPIC-PAA-ESI-MS)法对开环异落叶松树脂酚二葡萄糖苷进行定性和定量检测，研究方法的精密度、稳定性、定量检测限及加样回收率，并考察样品制备方法对定量检测结果的影响。

In this paper, the design of structural collectivity of some project is given as an example to sample introduce that the ecumenic method and process of designing of structural collectivity by MCAD technology. This method can be used as reference by craft brother when the design of structural collectivity of digital ＆ simulational is being designed.

本文以某科研项目的结构总体设计为例，简要介绍了利用MCAD技术进行结构总体数字化仿真设计的一般方法和过程，可以作为同行进行结构总体数字仿真设计的参考。

The first part is the introduction, which generally introduces the research purpose and significance of this thesis, the summary of the financial pre-warning researches both home and abroad, and the research main contexts and research methods; The second part is the comparison on the financial pre-warning methods existent, which compares the different methods by categories, makes a further analysis on the limits of existent methods, and proposes the improve thoughts of this research based on that; The third part is the basic theory, which makes a summary of the referent theories exerted on the research, and exposit the comparing mechanism of the grey prediction theory and the artificial neural network method concise; The fourth part is the frame work of the model, which illuminates the research designs step by step, such as the definition of the financial crisis, the method of sample select, the select and definition of the pre-warning variables, and makes an exposition of the establishment procedures of the whole models at last; The fifth part is the financial pre-warning based on the theory of grey prediction and artificial neural network, which mainly demonstrate the model establishment in the concrete, dividing into four part to carry out the part of pragmatic research integrally, building of indexes system, establishment of BP neural networks, dynamic financial pre-warning and test, analysis on the pre-warning result; The sixth part is conclusion, which sums up the main results of the whole research, clarifies the innovative points, and makes a discussion on the limits and future study directions of the research in this thesis.

其中，第一部分为导论，总括性概述本文的研究目的与意义，国内外研究综述，以及本文的研究内容和方法；第二部分为现有财务预警研究方法剖析，通过对现有预警方法进行分类比较，进一步分析现有预警方法的局限性，并在此基础上提出本文研究的改进思路；第三部分基本理论，对本文研究中运用的相关理论进行扼要概述，并简要阐述灰色预测理论与人工神经方法的融合机理；第四部分为模型研究框架，逐步阐释模型对财务困境的界定，样本数据的选取方法，预警变量的选取与定义等各个部分的研究设计，并对整体模型的构建步骤进行简要阐述；第五部分为基于灰色神经网络模型的财务预警，主要论述动态预警模型的具体实现过程，分模型指标体系的建立，BP神经网络的建立，动态财务预警与检验，以及预警结果分析四个部分全面阐述本文实证分析过程；第六部分为结论，总结本文研究得到的主要研究结论，以及本文研究中的创新之处，并对论文的不足与后续发展研究进行探讨。

An effective method was developed to get the optical properties from the transmittance spectrum of the sample, and the dependences of refractive index and extinctive coefficient on wavelength were calculated with this method.

得出了该薄膜在400nm～2400nm区域内的折射率、消光系数等参量与波长的变化关系和与之相符合的柯西色散公式，并通过外推的方法估算出了薄膜的光学能量带隙为3.65eV。

The microwave- assisted sample digestion method and determination method for pb and cd in the mollugo pentaphylla l. were established.

方法通过对样品消解方法及仪器参数进行优化，建立了粟米草中pb、cd的石墨炉原子吸收光谱测定方法。

The chemical analysis of N, P and K in organic fertilizer is presented: sample is decomposed by sulfuric acid-hydrogen peroxide and prepared to be a solution. N can be determined by NC-2 model quick N analysis set, P by chinoline molybdic acid method and K by tetraphenylboron potassium, needless of spectral photometer and flame photometer, the method is available when the content of N, P or K is over 0.1% with desired accuracy and precision.

介绍用化学分析方法测定有机肥料氮、磷、钾的含量，即样品经硫酸-过氧化氢消化后，制备待测溶液，分取待测溶液用NC-2型快速定氮仪测定氮，用磷钼酸喹啉重量法测定磷，用四苯硼酸钾重量法测定钾，不需使用分光光度计和火焰光度计，适宜一般复混肥料厂采用，对含氮、磷、钾分别达0.1％以上的样品均可用本法测定，方法的准确度和精密度能满足生产的要求。

According to detecting sample, the application of high-density detecting method is introduction in the aspects of metal minerals, geological hazards, environmental geology and the superiority to normal resistively method.

通过实例论述了高密度电阻率探测方法在金属矿产、灾害、环境地质等方面的应用效果。

A method for direct determination of Cu, Pb, Zn, S, Mg and As in copper sulphide concentrates by Axios PW4400 wavelength dispersive X-ray fluorescence spectrometer using lithium metaborate-lithium tetraborate fusion sample preparation method has been developed.

采用偏硼酸锂和四硼酸锂混合熔剂熔融法制样，波长色散X射线荧光光谱法测定铜精矿中铜、铅、锌、硫、镁、砷，考察了熔剂、玻璃化试剂和预氧化条件对制样的影响。

This paper presents a N-R method of acquiring multi-level reasoning production rules automatically based on NN, so as to resolve the bottle neckproblem in building a knowledge - based system-knowledge acquisition. This methodadopts a characteristic NN structure model and corresponding learning algorithm, so thatN -R method can fix the number of hidden nodes dynamically and form new conceptswhich are not defined in the sample set in the course of learning. Having been trained, NNis transforme...

本文为解决知识系统构造过程中的瓶颈问题──知识获取，提出了一种基于神经网络NN的自动获取多级推理产生式规则的N－R方法，该方法采用了特有的NN结构模型和相应的学习算法，使得NN在学习过程中动态确定隐层节点数的同时，也产生了样例集中没有定义的新概念，学习后的NN能用本文提出的转换算法转换成推理网络，最终方便地得到产生式规则集

The detection limit of EDTA titrimetric method for sulfate was determined according to a procedure which is basically EPA method detection limit procedure except that it also accounts for the contribution of variability of blank and total hardness on sample results.

在美国环保总署方法检出限程序的基础上，设计了一个能考虑样品空白和总硬度的可变性对样品测量值贡献的方法检出限程序，并按照此程序对EDTA滴定法测定硫酸盐的检出限进行了确定。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。