Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Prediction of Surface Roughness in High Speed Milling Process Using the Artificial Neural Networks (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 713-718 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The objective of this research was to apply the artificial neural network algorithm topredict the surface roughness in high speed milling operation. Tool length, feed rate, spindle speed,cutting path interval and run-out were used as five input neurons; and artificial neural networksmodel based on back-propagation algorithm was developed to predict the output neuron-surfaceroughness. A series of experiments was performed, and the results were estimated. Theexperimental results showed that the applied artificial neural network surface roughness predictiongave good accuracy in predicting the surface roughness under a variety of combinations of cuttingconditions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.713.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A Study on the Characteristics of Micro Deep Hole Machining Processes (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 566-571 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Recently, the trends of industrial products move towards more miniaturization, varietyand mass production. Micro drilling which take high precision in cutting work is required toperform more micro hole and high speed working. Especially, Micro deep hole drilling is becomingmore important in a wide spectrum of precision production industries, ranging from the productionof automotive fuel injection nozzle, watch and camera parts, medical needles, and thick multilayeredPrinted Circuit Boards(PCB) that are demanded for very high density electric circuitry. Theindustries of precision production require smaller holes, high aspect ratio and high speed workingfor micro deep hole drilling. However the undesirable characteristics of micro drilling is the smallsignal to noise ratios, wandering motion of drill, high aspect ratio and the increase of cutting forceas cutting depth increases. In order to optimize cutting conditions, an experimental study on thecharacteristics of micro deep hole machining processes using a tool dynamometer was carried out.And additionally, microscope with built-in an inspection monitor showed the relationship betweenburr in workpieces and chip form of micro drill machining
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.566.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Analysis of lipid composition and hydroxyl radicals in brain membranes of senescence-accelerated mice (1996)
    Springer
    Age 19 (1996), S. 1-5 
    Details
    ISSN: 1574-4647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study demonstrates that brain membrane and lipid peroxidation alterations readily occur in senescence-accelerated mice (SAM); when comparing two substrains, senescence-prone (SAM P1) with senescence-resistant (SAM R1), results indicate that age-related changes are more pronounced in the SAM P1 than in the SAM R1. For example, one age-related change observed in mice is elevated cholesterol in tissue. Experiments found that cholesterol levels, as well as cholesterol/phospholipid ratios, are significantly higher in brain mitochondria and microsomes in SAM P1 than those in SAM R1. Another indicator of age-related change in the P1 substrain, oxidative status, is shown by higher levels of peroxidizable fatty-acids. Results show the peroxidizability index, derived from the mitochondrial fatty acid profile, is consistently higher in SAM P1 than in SAM R1, indicating its increased vulnerability to oxidative damage. This vulnerability was confirmed by a higher malondialdehyde content in brain microsomes and significantly higher amounts of hydroxyl radicals in the brain membrane than those in SAM R1. Similar differences were noted in the ratios of arachidonic/linoleic acid in the brain microsomes of SAM P1. Taken together, these results indicate an elevated oxidative status in the senescence-prone strain, SAM P1, and leads to the proposal that increased oxidative stress may play an important role in this substrain’s susceptibility to the senescence process. This study also shows these mice substrains can be useful for the study of free radical metabolism because it has characteristics that are consistent with the predictions made by the oxidative stress hypothesis of aging.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02439515
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...