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Siripon Anantawaraskul Mahapon Toungsetwut Ratchadaporn Pinyapong 《Macromolecular Symposia》2008,264(1):157-162
An artificial neural network (ANN) is applied to determine appropriate parameters in copolymerization of ethylene and 1-octene via metallocene catalytic system for producing a copolymer with desired chain microstructures. The polymerization parameters of interests are polymerization temperature, ethylene pressure, and the amount of hydrogen used. The ANN used is a feed-forward network with a back propagation learning method and has a 5-6-6-3 architecture. When comparing with both training and testing experimental data sets, it was found that ANN can provide a good guesstimation of polymerization parameters. 相似文献
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Suttinart Noothongkaew Ratchadaporn Supruangnet Worawat Meevasana Hideki Nakajima Sukit Limpijumnong Prayoon Songsiriritthigul 《Applied Surface Science》2009,256(4):980-983
Exposure of a clean Zn metal to oxygen in ultra high vacuum provides a mean to gradually form ZnO. With in situ synchrotron photoelectron measurement, the progressive change in the spectra with the oxygen exposure time is observed. The analysis of the spectra allows the determination of ZnO formation. It was found that the oxidation process takes place until reaching the critical thickness, at which the oxidation rate reduces greatly to nearly zero. The critical thickness was determined to be about 2 monolayers. 相似文献
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W. Meevasana R. Supruangnet O. Topon P. Songsiriritthigul 《Applied Surface Science》2009,256(4):934-936
Recently, tetramantane, a member of diamondoid series (C4n+6H4n+12), has shown to exhibit negative-electron-affinity effect which has a potential use for efficient electron emitting devices. Here, we explore the electronic property of adamantane (C10H16), the smallest member of the series. We prepare adamantane films on Si(1 1 1) substrates and then study their electronic structure with photoemission spectroscopy. Photoelectron spectra of adamantane on Si(1 1 1) have shown a peak at low-kinetic energy which could be a generic property of diamondoids. The possibility of the negative-electron-affinity effect in adamantane is further discussed. 相似文献
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Laohana Peerawat Tanapongpisit Nantawat Kim Sangmo Eknapakul Tanachat Fongkaew Ittipon Supruangnet Ratchadaporn Nakajima Hideki Meevasana Worawat Bark Chung Wung Saenrang Wittawat 《Journal of Solid State Electrochemistry》2021,25(4):1121-1129
Journal of Solid State Electrochemistry - In this letter, we report on the simple process of preparing perovskite oxide SrMnO3 and the studying of the size effect on electrochemical properties for... 相似文献
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