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1.
Kimiaki Shirahama Yuta Matsuoka Kuniaki Uehara 《Multimedia Tools and Applications》2014,71(3):967-989
An application of Query-By-Example (QBE) is presented where shots that are visually similar to provided example shots are retrieved. To implement QBE, counter-example shots are required to accurately distinguish shots that are relevant to the query from those that are not (Li and Snoek (2009), Yu et al. (2004)). However, there are usually a huge number of shots, not relevant to a particular query, which can serve as counter-example shots. It is difficult for a user to provide counter-example shots that would aid retrieval. Thus, we developed a QBE method based on partially supervised learning where a retrieval model is constructed by selecting counter-example shots from shots without user supervision. To ensure the speed and accuracy of the QBE method, we select a small number of counter-example shots that are visually similar to given example shots but irrelevant to the query. Such shots are useful for characterizing the boundary between relevant and irrelevant shots. For our method, we first filter shots that are visually dissimilar to example shots based on SVMs on a visual feature. Then we filter shots relevant to the query based on concept detection results from pre-constructed classifiers. Shots that pass the above two tests are considered as counter-example shots. Experimental results obtained using TRECVID 2009 video data validate the effectiveness of our method. 相似文献
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K Dohmen T Shimada S Onohara M Shirahama Y Miyamoto K Irie H Ishibashi 《Canadian Metallurgical Quarterly》1998,89(9):277-281
A 63-year-old Japanese male with diabetes mellitus developed obstructive jaundice following the onset of multiple hepatic abscesses. Percutaneous transhepatic cholangiography showed intrahepatic bile duct irregularity and dilatations accompanied by a complete obstruction of the right branch of the intrahepatic bile duct. Three kinds of organisms were cultured from the blood and the drained bile. The cholangiographic changes returned to the normal after the liver abscesses subsided following biliary drainage and the administration of intravenous antibiotics. 相似文献
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Toshiaki Kobayashi Junko Taniguchi Masaru Suzuki Keiya Shirahama 《Journal of Low Temperature Physics》2007,148(5-6):797-801
Previously, we carried out ultrasonic measurements for liquid 4He filled in a nanoporous glass (Gelsil), and observed an increase in the sound velocity due to decoupling of the superfluid
component. At zero pressure, the superfluid transition temperature T
C is suppressed to 1.4 K from the bulk lambda point, 2.17 K. This behavior is the same as torsional oscillator measurements
by Yamamoto et al. (Phys. Rev. Lett. 93:075302, 2004). However, the pressure dependence of T
C and the temperature dependence of the superfluid fraction are very different from the torsional oscillator measurements.
In order to clarify the origin of the difference, we have developed a new technique of simultaneous measurement of an ultrasound
and a torsional oscillator, and the system successfully works for a nanoporous glass. Here, we compare decoupling of the superfluid
component for 4He films between an ultrasound and a torsional oscillator. 相似文献
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Raghavendra C. Mundargi Michael G. Potroz Soohyun Park Jae Hyeon Park Hitomi Shirahama Jae Ho Lee Jeongeun Seo Nam‐Joon Cho 《Advanced functional materials》2016,26(4):487-497
Herein, the exploration of natural plant‐based “spores” for the encapsulation of macromolecules as a drug delivery platform is reported. Benefits of encapsulation with natural “spores” include highly uniform size distribution and materials encapsulation by relatively economical and simple versatile methods. The natural spores possess unique micromeritic properties and an inner cavity for significant macromolecule loading with retention of therapeutic spore constituents. In addition, these natural spores can be used as advanced materials to encapsulate a wide variety of pharmaceutical drugs, chemicals, cosmetics, and food supplements. Here, for the first time a strategy to utilize natural spores as advanced materials is developed to encapsulate macromolecules by three different microencapsulation techniques including passive, compression, and vacuum loading. The natural spore formulations developed by these techniques are extensively characterized with respect to size uniformity, shape, encapsulation efficiency, and localization of macromolecules in the spores. In vitro release profiles of developed spore formulations in simulated gastric and intestinal fluids have also been studied, and alginate coatings to tune the release profile using vacuum‐loaded spores have been explored. These results provide the basis for further exploration into the encapsulation of a wide range of therapeutic molecules in natural plant spores. 相似文献
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Chikara Tsutsumi Katsuhiko Nakagawa Hiroyuki Shirahama Hajime Yasuda 《Polymer International》2003,52(3):439-447
Syntheses and biodegradation of statistical copolymers of D ,L ‐lactide (D ,L ‐LA) with trimethylene carbonate (TMC), rac‐1‐methyltrimethylene carbonate (1‐MTMC) and 2,2‐dimethyltrimethylene carbonate (2,2‐DTMC) were investigated at various monomer ratios using SmMe(C5Me5)2THF as an initiator at 80 °C for 24 h in toluene. Biodegradations of poly(D ,L ‐LA‐co‐racemo‐1‐MTMC) (95/5) and poly(D ,L ‐LA‐co‐2,2‐DTMC) (98/2) with a compost at 60 °C proceed rapidly. Enzymatic degradations of these polymers were also performed using cholesterol esterase, lipoprotein lipase and proteinase K. Only poly(D ,L ‐LA‐co‐TMC) was biodegraded with cholesterol esterase, while poly(TMC), poly(1‐MTMC), poly(2,2‐DTMC) and poly(D ,L ‐LA) were barely degraded with these enzymes. Biodegradations of poly(D ,L ‐LA‐co‐TMC) (87/13) and poly(D ,L ‐LA‐co‐racemo‐1‐MTMC) (95/5) are rapid using proteinase K. Physical properties of these copolymers were also described. © 2003 Society of Chemical Industry 相似文献
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Shirahama H. Sakurai Y. Matsuda Y. Ishigaki Y. Murai K. 《Power Electronics, IEEE Transactions on》1994,9(1):1-6
A new type of GPG (gate pulse generator) is presented to give GTO power converters quick response firing angle control and PWM control functions. Using the GPG, an instantaneous control method of active and reactive powers for an SMES (superconducting magnetic energy storage) employing one GTO converter is studied 相似文献
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Hitomi Yoshimura Rama Higashino Yoshiyuki Shibayama Keiya Shirahama 《Journal of Low Temperature Physics》2012,169(3-4):218-227
The existence of “Non-Classical Rotational Inertia (NCRI)” in solid 4He below 0.2?K has been controversial and interpreted by a number of different theories. We report on torsional oscillator measurements for 4He in a nanoporous Gelsil glass, which has a network of nanopores with 3.5?nm in diameter. In addition to the usual “low-T NCRI” with an onset temperature 0.15?K, we find a larger decrease in rotational moment of inertia in a broad range of temperature from 0.2 to 1.9?K. This “high-T inertial anomaly” is accompanied with multiple dissipation peaks, but has no dependence on torsional oscillation velocity unlike the low-T NCRI. Since the high-T anomaly is observed also in confined liquid states, it originates in amorphous solid 4He layer near the pore wall. Our result shows that different types of supersolid—like phenomena, i.e. inertial anomalies, can coexist in a single 4He sample, even with genuine superfluidity of liquid 4He. 相似文献
10.
N. Shirahama I. Mochida Y. Korai K. -H. Choi T. Enjoji T. Shimohara A. Yasutake 《Applied catalysis. B, Environmental》2005,57(4):237-245
Reaction of NO in air with urea supported on activated carbons (AC) was examined in the range of 100–1000 ppm NO at room temperature to establish a basic scheme for its reduction in open atmosphere. NO in atmosphere containing O2 was found to be selectively reduced with urea supported on AC at the W/F of 2.5×10−3 to 1.5×10−3 ACF g min/ml and its reduction continued until the complete consumption of urea. The reduction of NO with urea supported on AC appears to proceed through the following steps.
NO2+NO+(NH2)2CO→2N2+CO2+H2O
Combining (1) and (2) steps results in the followed reaction equation.
Since (1) is rate determining, high NO oxidation activity is essential for AC to be active for the reaction. At the same time, activation of urea by AC is also necessary to reduce NO2. The present scheme for NO reduction with urea on the AC is very effective to remove NOx in the open atmosphere under ambient conditions. 相似文献