共查询到20条相似文献,搜索用时 125 毫秒
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银—铜—铁—镍体系测定条件的实验设计优化和卡尔曼滤波法的同时测定 总被引:2,自引:0,他引:2
利用二次通过旋转组合设计的方法建立了吸光度与显色剂,增敏剂用量以及pH值之间的数学模型,进而得到使吸光度量最大的显色剂用量,增敏剂用量及pH值,在此优化的基础上,用卡尔曼滤波分析分光光度法对银,铜,铁,镍的合成样品的合谱进行了解析处理,得到较为满意的结果。 相似文献
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利用二次通用旋转组合设计的方法,建立了吸光度与显色剂、增敏剂用量以及pH值之间的数学模型,进而得到使吸光度最大的显色剂用量、增敏剂用量及pH值。在此优化的基础上,用目标转换因子分析分光光度法对银、铜、铁、镍的合成样品的合谱进行了解析处理,得到较为满意的结果。 相似文献
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卟啉胶束增敏导数分光光度法测定微量锰 总被引:1,自引:0,他引:1
卟啉的分子截面积大,与一些金属离子配合都具有很高的摩尔吸光值,已被称之为“超高灵敏度的显色剂”。文献研究了在阳离子表面活性剂存在下,锰与阴离子卟啉的增敏反应,本文在阴离子表面活性剂存在下,采用导数光度法,探讨的锰与阳离子卟啉的增敏作用。试验表明,试液中无论是单体还是胶束对锰与阳离子卟啉生成的Mn-T(4-TAP)P二元配合物均有增敏作用,最大吸收波长紫移。 相似文献
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O/W微乳液对Zn(Ⅱ)—PAR的增敏作用 总被引:2,自引:1,他引:2
研究了十六烷基三甲基溴化铵9CTMAB)/正戊醇/正庾烷/水组成的阳离子型O/W微乳液对以4-(2-吡啶偶氮)间苯二醇(PAR)为显色剂,光度法测定锌的增敏作用。结果,方法简便、快速,与相应的胶束体系为介质比较,提高了测定灵敏度,结果可靠。通过对显色剂在水-微乳液和在水-胶束相中分配系数的测定,初步了微乳液的增敏作用机理。 相似文献
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β环糊精对显色反应作用的研究:Ⅱ.与表现活性剂的协同作用机理探讨 总被引:5,自引:0,他引:5
本文从β-环糊精(β-CD)的包合作用及其对表面活性剂(SF)包合后引起的包合常数增大等方面,探讨了β-CD-与离子表面活性剂对显色反应的协同增敏作用机理,研究表明:β-CD与SF形成包合物SF-β-CD及SF-β-CD对显色剂及其显色络合物包合作用的增强,是产生协同增敏作用的主要因素,但还须考虑对空白值的影响以及配合物的稳定性,还提出了对一同显色体系应用不同SF-β-CD估计协同增敏趋势的方法。 相似文献
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主成分-人工神经网络在近红外光谱定量分析中的应用 总被引:13,自引:0,他引:13
近红外光谱的主成分由非线性迭代偏最小二乘法(NIPALS)求出。主成分作标准化处理后,作为B-P神经网络的输入结点进行非线性迭代。该法的优点是,充分利用了全光谱的数据,得到消除噪声后的最佳主成分,能建立非线性模型,B-P神经网络迭代时间显著缩短。用该法对大麦中的淀粉含量进行了定量分析研究。结果为:校准和预测的相关系数分别为0.981和0.953,校准和预测的相对标准偏差分别为1.70%和2.48%。 相似文献
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流动注射在线预富集人工神经网络—光度法同时测定地质样品中金,钯,银 总被引:8,自引:0,他引:8
将流动注射在线预富集技术引入光度分析,较好地解决了一般用树脂相光度法重现性不好的问题。提出了应用淋洗曲线作为多组份同时测定的定量依据;采用人工神经网络法对体系的非线性数据进行处理,较好地解决了复杂的地质样品中痕量贵金属元素Au、Pd、Ag的同时测定。 相似文献
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In this study,an application of artificial neural network(ANN)has been presented in modeling and studying the effect of compounding variables on abrasion behavior of rubber formulations.Three case studies were carried out in which the experiment data were collected according to classical response surface designs.Besides developing the ANN models,we developed response surface methodology(RSM)to confirm the ANN predictions.A simple relation was employed for determination of relative importance of each variable according to ANN models.It was shown through these case studies that ANN models delivered very good data fitting and their simulating curves could help the researchers to better understand the abrasion behavior. 相似文献
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Prediction of soluble solids content, firmness and pH of pear by signals of electronic nose sensors 总被引:2,自引:0,他引:2
The objective of this study was to investigate the predictability of an electronic nose for fruit quality indices. Responses signal of sensor array in electronic nose were employed to establish quality indices model for “xueqing” pear. The relationships were established between signal of electronic nose and the quality indices of fruit (firmness, soluble solids content (SSC) and pH) by multiple linear regressions (MLR) and artificial neural network (ANN). The prediction models for firmness and soluble solids content indicated a good prediction performance. The SSC model by ANN had a standard error of prediction (SEP) of 0.41 and correlation coefficient 0.93 between predicted and measured values, the model by ANN for the penetrating force (CF) had a 3.12 SEP and 0.94 coefficient, respectively. The results imply that it is possible to predict “xueqing” pear quality characteristics from signal of E-nose. 相似文献
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Summary This paper presents an Artificial Neural Network (ANN) model for determining the total radioactivity in Hazar Lake (Sivrice,
Turkey). In order to cope with complex calculations and experiments required for the determination of total radioctivity.
The proposed ANN system employs the individual training strategy with fixed-weight and supervised models. The simulation demonstrate
the feasibility of the neural based model. Compared to the classical methods, the proposed ANN-based model makes the processes
much easier. 相似文献
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