21. Validation of Models to Predict the Overall Fit Factors for Half-Mask and Full-Facepiece Respirators

2004 ◽  
Author(s):  
C. Fitzgerald ◽  
R. Oestenstad ◽  
D. Redden
Keyword(s):  
Validation Of Models

Cross-validation of models and tests in preclinical science

2008 ◽  
Vol 98 ◽  
pp. 28
Author(s):  
V. Brown ◽  
J. Waddington ◽  
H. Einat ◽  
J. Feldon ◽  
H. Marston
Keyword(s):  
Cross Validation ◽  
Validation Of Models

Predicting proliferative vitreoretinopathy: temporal and external validation of models based on genetic and clinical variables

2014 ◽  
Vol 99 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Jimena Rojas ◽  
Itziar Fernandez ◽  
Jose C Pastor ◽  
Robert E MacLaren ◽  
Yashin Ramkissoon ◽  
...  
Keyword(s):  
Proliferative Vitreoretinopathy ◽  
External Validation ◽  
Clinical Variables ◽  
Validation Of Models

scholarly journals USE OF ANTHROPOMORPHIC HETEROGENEOUS PHYSICAL PHANTOMS FOR VALIDATION OF COMPUTATIONAL DOSIMETRY OF MEDICAL PERSONNEL AND PATIENTS

2020 ◽  
Vol 25 ◽  
pp. 148-176
Author(s):  
V. Chumak ◽  
◽  
N. Petrenko ◽  
O. Bakhanova ◽  
V. Voloskyi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ionizing Radiation ◽  
Human Body ◽  
Ct Scanning ◽  
Medical Personnel ◽  
Radiation Doses ◽  
Physical Measurements ◽  
Simple Geometry ◽  
Anthropomorphic Phantoms ◽  
Validation Of Models

In the dosimetry of ionizing radiation, the phantoms of the human body, which are used as a replacement for the human body in physical measurements and calculations, play an important, but sometimes underestimated, role. There are physical phantoms used directly for measurements, and mathematical phantoms for computational dosimetry. Their complexity varies from simple geometry applied for calibration purposes up to very complex, which simulates in detail the shapes of organs and tissues of the human body. The use of physical anthropomorphic phantoms makes it possible to effectively optimize radiation doses by adjusting the parameters of CT-scanning (computed tomography) in accordance with the characteristics of the patient without compromising image quality. The use of phantoms is an indispensable approach to estimate the actual doses to the organs or to determine the effective dose of workers – values that are regulated, but cannot be directly measured. The article contains an overview of types, designs and the fields of application of anthropomorphic heterogeneous physical phantoms of a human with special emphasis on their use for validation of models and methods of computational dosimetry. Key words: dose, ionizing radiation, physical, mathematical phantoms, computational dosimetry.

scholarly journals Practical Tips for Modelling Lot-Sizing and Scheduling Problems

2009 ◽  
Vol 3 (2) ◽  
pp. 37-48
Author(s):  
Waldemar Kaczmarczyk
Keyword(s):  
Lot Sizing ◽  
Valid Inequalities ◽  
A Priori ◽  
Computational Effort ◽  
Scheduling Problems ◽  
Good Balance ◽  
Validation Of Models ◽  
Short Time ◽  
Lot Sizing And Scheduling

This paper presents some important alternatives for modelling Lot-Sizing and Scheduling Problems. First, the accuracy of models can improved by using short time buckets, which allow more detailed planning but lead to higher computational effort. Next, valid inequalities make the models tighter but increase their size. Sometimes it is possible to find a good balance between the size and tightness of a model by limiting a priori the number of valid inequalities. Finally, a special normalization of the variables simplifies the presentation of results and validation of models.

Beware of proper validation of models for ionic Liquids!

2021 ◽  
Vol 344 ◽  
pp. 117722
Author(s):  
D.M. Makarov ◽  
Yu.A. Fadeeva ◽  
L.E. Shmukler ◽  
I.V. Tetko
Keyword(s):  
Ionic Liquids ◽  
Validation Of Models
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