Treatment of Agricultural Wastewater in Downflow Reed Beds: Experimental Trials and Mathematical Model

1998 ◽  
Vol 69 (1) ◽  
pp. 63-71 ◽  
Author(s):  
G. Sun ◽  
K.R. Gray ◽  
A.J. Biddlestone
Keyword(s):  
Mathematical Model ◽  
Reed Beds ◽  
Agricultural Wastewater ◽  
Experimental Trials

Towards an integrated CADCAM process for the production of forming shoulders with exact geometry

2007 ◽  
Vol 221 (10) ◽  
pp. 1521-1531 ◽  
Author(s):  
B Hicks ◽  
G Mullineux ◽  
J Matthews ◽  
T Medland
Keyword(s):  
Mathematical Model ◽  
Consumer Goods ◽  
Fast Moving ◽  
Complex Geometry ◽  
Cnc Machining ◽  
Design Issues ◽  
Exact Geometry ◽  
Fast Moving Consumer Goods ◽  
Experimental Trials ◽  
Machine Tooling

This paper considers the application of advanced CADCAM techniques for the production of the complex machine tooling used in packaging fast-moving consumer goods. In particular, the paper discusses the practical considerations and design issues that need to be addressed in order to construct CNC machined tooling with exact geometry. The paper considers in detail the design of ‘forming shoulders’, a common means to form bags, and begins with a mathematical model for defining its complex geometry. A CADCAM method for producing a forming shoulder with exact geometry is then summarized. In practice, it is necessary to modify the geometry of the forming shoulder in order to produce an overlap of material for the creation of a bag. This process also demands that the geometry of the forming shoulder ‘overlaps‘, which has certain implications for the CNC machining of the surface. These considerations and the means by which they are overcome are discussed with respect to a series of prototypes and experimental trials. The performance of a forming shoulder, produced by way of the integrated CADCAM process, during extended production trials is then discussed.

Mathematical model of hit phenomena and its application to movie advertisement

2008 ◽  
Author(s):  
Ishii Akira ◽  
Yoshida Narihiko ◽  
Hayashi Takafumi ◽  
Umemura Sanae ◽  
Nakagawa Takeshi
Keyword(s):  
Mathematical Model

Imprecision of Laboratory Determinations and Diagnostic Accuracy: Theoretical Considerations

1974 ◽  
Vol 13 (03) ◽  
pp. 151-158 ◽  
Author(s):  
D. A. B. Lindbebo ◽  
Fr. R. Watson
Keyword(s):  
Mathematical Model ◽  
Diagnostic Accuracy ◽  
Diagnostic Process ◽  
Clinical Laboratories ◽  
Non Linear ◽  
Theoretical Considerations ◽  
Made In

Recent studies suggest the determinations of clinical laboratories must be made more precise than at present. This paper presents a means of examining benefits of improvement in precision. To do this we use a mathematical model of the effect upon the diagnostic process of imprecision in measurements and the influence upon these two of Importance of Diagnosis and Prevalence of Disease. The interaction of these effects is grossly non-linear. There is therefore no proper intuitive answer to questions involving these matters. The effects can always, however, be calculated.Including a great many assumptions the modeling suggests that improvements in precision of any determination ought probably to be made in hospital rather than screening laboratories, unless Importance of Diagnosis is extremely high.

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