排序方式: 共有10条查询结果,搜索用时 171 毫秒
1
1.
We give a proof for the Hölder continuity of functions in the parabolic De Giorgi classes in metric measure spaces. We assume the measure to be doubling, to support a weak (1, p)-Poincaré inequality and to satisfy the annular decay property. 相似文献
2.
Tuomo Kuusi Rojbin Laleoglu Juhana Siljander José Miguel Urbano 《Calculus of Variations and Partial Differential Equations》2012,45(1-2):193-229
We complete the study of the regularity for Trudinger’s equation by proving that weak solutions are H?lder continuous also in the singular case. The setting is that of a measure space with a doubling non-trivial Borel measure supporting a Poincaré inequality. The proof uses the Harnack inequality and intrinsic scaling. 相似文献
3.
Nor Nor Azureen Mohamad Jaafar Juhana Kim Je-Deok 《Journal of Solid State Electrochemistry》2020,24(5):1185-1195
Journal of Solid State Electrochemistry - This study explored the concept of improving the properties of the cross-linked membrane using a 1.5-nm closed cage octaphenyl polyhedral silsesquioxane... 相似文献
4.
Juhana Siljander 《Journal of Mathematical Analysis and Applications》2010,371(1):158-167
We prove the local boundedness of the gradient for positive solutions to a doubly nonlinear parabolic equation in the case when the standard Lebesgue measure has been replaced by a doubling measure which supports a weak Poincaré inequality. 相似文献
5.
Kati S Mönkkönen Juhana M Hakumäki Robert A Hirst Riitta A Miettinen Christopher O'Callaghan Pekka T Männistö Jarmo T Laitinen 《BMC neuroscience》2007,8(1):26
Background
In the CNS, the heterotrimeric G protein Gαi2 is a minor Gα subunit with restricted localization in the ventricular regions including the ependymal cilia. The localization of Gαi2 is conserved in cilia of different tissues, suggesting a particular role in ciliary function. Although studies with Gαi2-knockout mice have provided information on the role of this Gα subunit in peripheral tissues, its role in the CNS is largely unknown. We used intracerebroventricular (icv) antisense administration to clarify the physiological role of Gαi2 in the ventricular system. 相似文献6.
Lukka Thuyavan Yogarathinam Juhana Jaafar Ahmad Fauzi Ismail Pei Sean Goh Mohd Hilmi Bin Mohamed Mohamad Fahrul Radzi Hanifah Arthanareeswaran Gangasalam Jerome Peter 《先进技术聚合物》2022,33(1):66-80
In direct methanol fuel cells (DMFC), methanol crossover is a major issue which has reduced the performance of polymer electrolyte membrane (PEM) for energy generation. In this study, graphene oxide (GO) and conductive polyaniline decorated GO (PANI-GO) were used as additives in fabrication of sulfonated poly(ether ether ketone) (SPEEK) nanocomposite PEM membrane to reduce methanol crossover. PANI-GO was synthesized by in situ polymerization method and the formation of PANI coated GO nanostructures was confirmed by surface morphology and crystallinity analysis. The membrane morphology and topography analysis confirmed that GO and PANI-GO were well dispersed on the surface of SPEEK membrane. 0.1 wt% PANI-GO modified SPEEK nanocomposite membrane exhibited the highest water uptake and ion exchange capacity of 40% and 1.74 meq g?1, respectively. The oxidative stability of the nanocomposite membranes also improved. Lower methanol permeability of 4.33 × 10?7 cm?2S?1 was noticed for 0.1 wt% PANI-GO modified SPEEK membrane. PANI-GO modified SPEEK membrane enhanced the proton conductivity, which was due to the existence of acidic and hydrophilic group present in PANI and GO. PANI-GO modified SPEEK membrane held higher selectivity of 1.94 × 104 S cm?3 s?1. Overall, these studies revealed that PANI-GO modified SPEEK membrane is a potential material for DMFC applications. 相似文献
7.
Mohamed Mohd Hilmi Othman Mohd Hafiz Dzarfan Hubadillah Siti Khadijah Rahman Mukhlis A. Jaafar Juhana Ismail Ahmad Fauzi 《Journal of Solid State Electrochemistry》2019,23(7):2195-2203
Journal of Solid State Electrochemistry - In this study, the effects of two fuel types, i.e., hydrogen and methane on the electrochemical performance of the co-extruded triple layer hollow fiber,... 相似文献
8.
Christer H. Bergstrm Bernd R. Sperlich Juhana Ruotoistenmki Jukka V. Seppl 《Journal of polymer science. Part A, Polymer chemistry》1998,36(10):1633-1638
Norbornene–ethylene copolymers were prepared using the metallocene catalyst ethylene bis (indenyl) zirconium dichloride with MAO, and their microstructure was characterized with 1H-NMR and 13C-NMR methods. From a Cosy 1H-NMR spectrum it was found that all norbornene units are enchained in the exo-configuration. The sequence distribution of norbornene units was investigated using 13C-1H correlations, hmqc for one-bond correlations, and hmbc for two- or three-bond correlations. It was shown that norbornene diads were formed at a high norbornene content (45 mol %). When further increasing the norbornene incorporation (66 mol %) a number of new signals were obtained. A Cosy 1H-NMR spectrum revealed a new crosspeak which, according to the corresponding 13C-NMR shifts (hmqc), correlated well with a terminal unit of a trimer of norbornene. This means that at very high norbornene contents, norbornene triads can be formed. Because the formation of isotactic norbornene triads is very difficult to understand from a sterical point of view, an epimerization process causing stereoirregularities in the norbornene triad is proposed. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1633–1638, 1998 相似文献
9.
Abd Mutalib Muhazri Othman Mohd Hafiz Dzarfan Aziz Madzlan A. Rahman Mukhlis Jaafar Juhana Ismail A. F. Mohamed Mohamad Azuwa 《Journal of Solid State Electrochemistry》2016,20(10):2895-2905
Journal of Solid State Electrochemistry - At lower operation temperature of intermediate temperature solid oxide fuel cells (IT-SOFC), polarization resistance was recognized as a limiting step... 相似文献
10.
1