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101.
Providing clean and sustainable energy for all is an ever elusive challenge, especially encountered in remote and poor rural areas. Cost-effective solutions have been found through renewable energy systems (RES) which, when combined with specialized products like rechargeable lamps using light emitting diodes (LED), can provide the basic energy needs (lighting) of rural homes, while replacing fossil-fuel based energy sources (e.g. kerosene lamps). The investigation presents an LED lamps provision system which circumvents the cost and technical challenges that currently hamper LED lamps diffusion into communities. Based on an actual rural island case (Pangan-an Island, Philippines), a sub-centralized lamp rental and charging system was mathematically modeled and analyzed (analytically and numerically) to identify the optimal states and policies, along with the effects of certain parameters, which promote financial viability and supply sustainability. It was found that a dynamically optimized lamp(s) purchase policy yields better financial returns than a statically optimized policy. Furthermore, it was realized that a sub-centralized lamps rental approach can serve as a complementary energy provision system for rural electrification projects by providing for the lower-tier energy demand market of low income users within a community. 相似文献
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Yusuke Kitamura Yoshiaki Morisada Hidetoshi Fujii Tadashi Mizuno Genryuu Abe 《Welding International》2017,31(4):278-283
(The microstructural refinement of cobalt-based alloy (Stellite No. 6) by laser cladding and friction stir processing (FSP) was studied. A nanometer-sized microstructure consisting of fine carbide (particle size: 100–200 nm) and a grain (grain size: 150–250 nm) was successfully fabricated by the FSP on the laser clad cobalt-based alloy. The nanostructured cobalt-based alloy (Stellite No. 6) had an extremely high hardness of about 750 HV. 相似文献
105.
Hirobumi Shibata Tomoaki Morita Taku Ogura Keishi Nishio Hideki Sakai Masahiko Abe Mutsuyoshi Matsumoto 《Journal of Materials Science》2009,44(10):2541-2547
Mesostructured zirconia particles having monoclinic-type crystalline walls were prepared using a low-temperature crystallization
technique. Crystalline zirconia particles with highly-ordered mesostructures were obtained through the sol–gel process of
zirconium sulfate tetrahydrate at 333 K in the presence of molecular self-assemblies of cetyltrimethylammonium bromide (CTAB)
or mixtures of CTAB and anionic molecules such as sodium dodecyl sulfate and sodium p-toluenesulfonate. Variations in the molar ratios of CTAB and the chemical species of anionic molecules led to the variations
in the periods of highly-ordered zirconia having crystalline walls. Calcination of the mesostructured zirconia particles prepared
using templates consisting solely of CTAB yielded crystalline mesoporous zirconia particles. 相似文献
106.
Electron beam sterilization of cyclo olefin polymer leads to polymer degradation and production of alkyl radicals 下载免费PDF全文
Hideaki Kiminami Yasufumi Imae Eiji Takahashi Hong Wei Satoshi Oomura Yoshihiko Abe 《应用聚合物科学杂志》2016,133(23)
We investigated the effects of electron‐beam (EB) sterilization on syringe barrels manufactured from cyclo olefin polymer (COP). The chemical structure of the polymer was determined by interpreting the 13C NMR and DEPT‐135 spectra of the COP resin. The antioxidants in the resin were identified by analyzing the liquid chromatography‐photo diode array‐mass spectrometry (LC‐PDA‐MS) data for the methanol extract of the resin and the gas chromatography‐mass spectrometry (GC‐MS) data for the supercritical methanol degradation products of the extract. NMR and LC‐PDA‐MS analyses revealed that EB sterilization produces degradation products in the COP main chain and reduces the quantity of the antioxidants in the COP resin. ESR spectra of the EB‐sterilized syringe barrels indicated the presence and location of alkyl radicals, which were generated in the COP main chain by EB sterilization. ESR analyses also indicated that the quantity of alkyl radicals decreased over time. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43498. 相似文献
107.
Satoshi?KameokaEmail author Satoru?Wakabayashi Eiji?Abe An?Pang?Tsai 《Catalysis Letters》2016,146(7):1309-1316
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Yosuke Yamazaki Yohei Abe Yukio Hioki Mitsuyoshi Nakatani Akikazu Kitagawa Kazuhiro Nakata 《Welding International》2016,30(10):745-754
Narrow gap welding with an oscillation laser beam is one of the effective processes for thick plate welding. To put this welding process into practical manufacturing, a groove-sensing system using image processing for narrow gap welding with an oscillation laser beam is used. This developed system uses still images of the weld zone taken by a coaxial CMOS camera. It can recognize the position of the groove wall by analysing the brightness distribution in the still image. It can then control the oscillation width and the laser-irradiated area by calculating the groove width and the groove centre position. Some narrow gap welding experiments were performed to evaluate the performance of the developed system. The results revealed that the developed system is effective for narrow gap welding with an oscillation laser beam. Using this system, the narrow gap groove can be welded even if the groove width has changed during the welding process. 相似文献
110.
Keisuke Yotsuji Naoyuki Hoshiya Takaaki Kobayashi Hayato Fukuda Hiroshi Abe Mitsuhiro Arisawa Satoshi Shuto 《Advanced Synthesis \u0026amp; Catalysis》2015,357(5):1022-1028
We describe a nickel‐catalyzed Suzuki–Miyaura arylation of a tertiary iodocyclopropane with arylboronic acids; this is an efficient and convergent strategy for providing various enantioenriched arylcyclopropanes with a quaternary stereogenic center. This is the first metal‐catalyzed coupling between a tertiary alkyl electrophile and a wide range of aromatics, including heteroaromatics. We found that the outcome of the Ni‐catalyzed coupling with halides as electrophiles was dependent on the stability of the radical species formed during the reaction. The use of tert‐butyl alcohol (t‐BuOH) as the reaction solvent was very effective, because of its stability under the radical‐generating reaction conditions.