Automotive Amplifier Heatsink Design and Thermal Analysis Research at Transient State Condition

2009 ◽  
Author(s):  
Cheng Wang ◽  
Fang Liao
2015 ◽  
Vol 282 ◽  
pp. 93-105 ◽  
Author(s):  
Jianjun Zhou ◽  
Daling Zhang ◽  
Suizheng Qiu ◽  
Guanghui Su ◽  
Wenxi Tian ◽  
...  

2013 ◽  
Vol 765-767 ◽  
pp. 88-91
Author(s):  
Xue Jun Nie

In this paper, the spindles thermal characteristics of CNC milling machine in steady state and transient state are analyzed by using ANSYS, the temperature field and thermal deformation field are obtained. After a number of tests are done in different working conditions, the temperature and thermal deformation changes of spindle are measured in every working condition. Combing the FEM analysis with tests results, the thermal deformation of spindle from starting to reach thermal balance on CNC milling machine is discussed, some suggestions are presented to improve the process precision of CNC milling machine.


1986 ◽  
Vol 82 ◽  
Author(s):  
U. S. Kim ◽  
R. J. Jaccodine

ABSTRACTThe behavior of oxidation—induced stacking faults(OSFs) during the O2 /NF3 oxidation of silicon has been investigated in the temperature range of 850–1100°C with varying concentration of NF 3 (0.011—0.044 vol%). In this study, we report the rapid and non-linear shrinkage of pregrown OSFs with time by a new oxidation process including small(ppm) additions of fluorine compound to the oxidant. It is also found that the shrinkage rate of OSF decreases as the oxidation time is increased. It is proposed that the fast OSF shrinkage is due to excessive vacancy flux as a result of the reaction of fluorine at the Si/SiO2 interface during the initial transient state, and subsequently the shrinkage rate is reduced as the steady—state condition of vacancy—interstitial recombination is approached.


Author(s):  
Jeff Gelles

Mechanoenzymes are enzymes which use a chemical reaction to power directed movement along biological polymer. Such enzymes include the cytoskeletal motors (e.g., myosins, dyneins, and kinesins) as well as nucleic acid polymerases and helicases. A single catalytic turnover of a mechanoenzyme moves the enzyme molecule along the polymer a distance on the order of 10−9 m We have developed light microscope and digital image processing methods to detect and measure nanometer-scale motions driven by single mechanoenzyme molecules. These techniques enable one to monitor the occurrence of single reaction steps and to measure the lifetimes of reaction intermediates in individual enzyme molecules. This information can be used to elucidate reaction mechanisms and determine microscopic rate constants. Such an approach circumvents difficulties encountered in the use of traditional transient-state kinetics techniques to examine mechanoenzyme reaction mechanisms.


2018 ◽  
Vol 138 (9) ◽  
pp. 1169-1175
Author(s):  
Akira Inoue ◽  
Takao Sato ◽  
Akira Yanou ◽  
Mingcong Deng
Keyword(s):  

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