A mathematical model describing the solid conveying and melting behavior of planetary roller extruders

2014 ◽  
Author(s):  
J. Rudloff ◽  
M. Lang ◽  
K. Kretschmer ◽  
P. Heidemeyer ◽  
M. Bastian ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Melting Behavior ◽  
Solid Conveying

Numerical Simulation of Extrusion Pressure of Non-Plug Flow Solid Conveying in Feeding Section

2011 ◽  
Vol 250-253 ◽  
pp. 4046-4051
Author(s):  
Chun Hui Liu ◽  
Da Li Shi ◽  
Yan Yang Wu ◽  
Jian Hua Qin
Keyword(s):  
Mathematical Model ◽  
Plug Flow ◽  
Extrusion Pressure ◽  
Screw Extruder ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Single Screw Extruder ◽  
Screw Extrusion ◽  
The Mathematical Model ◽  
Solid Conveying

According to the theory of extrusion pressure by molding in barrel of the single screw extruder specially designed for pure UHMWPE, extrusion pressure generated during the process must be sufficient while extrusion molding with single-screw extruder. The mathematical model for formation of extrusion pressure in feeding section during single-screw extrusion molding has been established. This paper conducted a research on theory of extrusion pressure which is part of n-lamina model of non-plug flow solid conveying in feeding section by single-screw extrusion molding.

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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