Calibration problems solving

The camera model has a high number of parameters with a high correlation between several parameters. Therefore, the calibration problem is a difficult nonlinear optimization problem with the well known problems of instable behaviour and local minima. In out work, an approach to separate the calibration of the distortion parameters and the calibration of the projection parameters is used to solve this problem. 

Analytical chemistry is a problem-solving science. Independent from the concrete analytical method, the course of action, called analytical process, is always very similar. The analytical process starts with the analytical question on the subject of investigation and forms a closed chain to the answer to the problem. Using a proper sampling technique a test sample is taken that is adequately prepared and then measured. The measured data are evaluated on the basis of a correct calibration and then interpreted with regard to the object under study. 

Albers and Marcovina (A9) recommended the use of well-selected monoclonal antibodies and of a common calibrator to solve some of these problems. According to Kottke et al. (K32), a particle concentration fluorescence immunoassay is a method of choice for quantitation, and the concentration should be expressed as moles of apo-B. 

Use of Cubic Spline Functions in Solving Calibration Problems... 

M. Sjostrom, S. Wold, W. Lindberg, J.A. Persson and H. Martens, A multivariate calibration problem in analytical chemistry solved by partial least squares models in latent variables. Anal. Chim. Acta, 150, 61-70 (1983). 

The PLS approach to multivariate linear regression modeling is relatively new and not yet fully investigated from a theoretical point of view. The results with calibrating complex samples in food analysis 122,123) j y jnfj-ared reflectance spectroscopy, suggest that PLS could solve the general calibration problem in analytical chemistry. 

Wold, S., Martens, H., Wold, H. The multivariate calibration problem in chemistry solved by the PLS method. Lecture notes in mathematics . Springer Verlag, Heidelberg, in press... 

Sjoestroem, M., Wold, S., Lindberg, W., Persson, J.A. and Martens, H., A Multivariate Calibration Problem in Analytical Chemistry Solved by Partial Least Squares Models in Latent Variables Anal. Chim. Acta 1983, 150, 61-70. 

Analytical Problem Solving Selection of Analytical Methods Multivariate Image Analysis Quality Assurance in Analytical Chemistry Quantitative Spectroscopic Calibration... 

Chemometrics is an interdisciplinary field that combines statistics and chemistry. From its earliest days, chemometrics has always been a practically oriented subdiscipline of analytical chemistry aimed at solving problems often overlooked by mainstream statisticians. An important example is solving multivariate calibration problems at reduced rank. The method of partial least-squares (PLS) was quickly recognized and embraced by the chemistry community long before many practitioners in statistics considered it worthy of a second look. ... 

Quality Control of Calibration Graphs. The main objective of any analytical method is to report reliable and accurate results that are informative in supporting the quality of products, be it as a part of problem-solving, detecting anomalies in samples,... 

In a cone-plate viscometer (Fig. 25), a low angle (<3°) cone rotates against a flat plate with the fluid sample between them. The cone-plate instrument is a simple, straightforward device that is easy to use and extremely easy to clean. It is well-suited to routine work because measurements are rapid and no tedious calculations are necessary. With careful calibration and good temperature control it can be a very effective research and problem-solving tool. Heated instruments can be used for melt viscosity measurements. 

The science of chemometrics gives spectroscopists many different ways to solve the calibration problem for analysis of spectral data. Some are very... 

Yet as long ago as 1966 the problem of calibration in GPC was solved. In that year, Benoit and his co-workers recognised that GPC separates on the basis of the hydrodynamic volume of the polymer molecules in solution. The intrinsic viscosity [rj] is related to the hydrodynamic volume, V, by the equation ... 

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