http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Tetsuaki (검색결과 15 건)
- 무료
- 기관 내 무료
- 유료
-
SAFETY STUDIES ON HYDROGEN PRODUCTIONSYSTEM WITH A HIGH TEMPERATURE GAS-COOLEDREACTOR
TETSUAKI TAKEDA 한국원자력학회 2005 Nuclear Engineering and Technology Vol.37 No.6
A primary-pipe rupture accident is one of the design-basis accidents of a High-Temperature Gas-cooled Reactor (HTGR). When the primary-pipe rupture accident occurs, air is expected to enter the reactor core from the breach and oxidize in-core graphite structures. This paper describes an experiment and analysis of the air ingress phenomena and the method for the prevention of air ingress into the reactor during the primary-pipe rupture accident. The numerical results are in good agreement with the experimental ones regarding the density of the gas mixture, the concentration of each gas species produced by the graphite oxidation reaction and the onset time of the natural circulation of air. A hydrogen production system connected to the High-Temperature Engineering Test Reactor (HTTR) is being designed to be able to produce hydrogen by themo-chemical Iodine-Sulfur process, using a nuclear heat of 10 MW supplied by the HTTR. The HTTR hydrogen production system is first connected to a nuclear reactor in the world; hence a permeation test of hydrogen isotopes through heat exchanger is carried out to obtain detailed data for safety review and development of analytical codes. This paper also describes an overview of the hydrogen permeation test and permeability of hydrogen and deuterium of Hastelloy XR.
-
SAFETY STUDIES ON HYDROGEN PRODUCTION SYSTEM WITH A HIGH TEMPERATURE GAS-COOLED REACTOR
TAKEDA TETSUAKI Korean Nuclear Society 2005 Nuclear Engineering and Technology Vol.37 No.6
A primary-pipe rupture accident is one of the design-basis accidents of a High-Temperature Gas-cooled Reactor (HTGR). When the primary-pipe rupture accident occurs, air is expected to enter the reactor core from the breach and oxidize in-core graphite structures. This paper describes an experiment and analysis of the air ingress phenomena and the method fur the prevention of air ingress into the reactor during the primary-pipe rupture accident. The numerical results are in good agreement with the experimental ones regarding the density of the gas mixture, the concentration of each gas species produced by the graphite oxidation reaction and the onset time of the natural circulation of air. A hydrogen production system connected to the High-Temperature Engineering Test Reactor (HTTR) Is being designed to be able to produce hydrogen by themo-chemical iodine-Sulfur process, using a nuclear heat of 10 MW supplied by the HTTR. The HTTR hydrogen production system is first connected to a nuclear reactor in the world; hence a permeation test of hydrogen isotopes through heat exchanger is carried out to obtain detailed data for safety review and development of analytical codes. This paper also describes an overview of the hydrogen permeation test and permeability of hydrogen and deuterium of Hastelloy XR.
-
Structural Relaxation of Semiconducting Vanadate and IR-Transmitting Gallate Glasses Containing Iron
Nishida, Tetsuaki The Korean Ceramic Society 2000 The Korean journal of ceramics Vol.6 No.1
Glass transition temperature (T/sub g/) is proportional to the quadrupole splitting(Δ) of Fe(III) obtained from the /sup 57/Fe Mossbauer spectra (T/sub g/-Δ rule (1990)). The values of Δ reflect the distortion of Fe(III) atoms, which occupy the sites of network-forming atoms. Heat treatment of potassium vanadate and calcium gallate glasses at around the individual T/sub g/ causes a structural relaxation, accompanying a linear decrease of T/sub g/ and Δ values. These experimental results prove that T/sub g/ decreases with a decrease in the distortion of VO₄, GaO₄, and FeO₄tetrahedra, as the T/sub g/-Δ rule predicted.
-
Color Recommendation for Text Based on Colors Associated with Words
Saki liba,Tetsuaki Nakamura,Maki Sakamoto 한국산업정보학회 2012 한국산업정보학회논문지 Vol.17 No.1
In this paper, we propose a new method to select colors representing the meaning of text contents based on the cognitive relation between words and colors. Our method is designed on the previous study revealing the existence of crucial words to estimate the colors associated with the meaning of text contents. Using the associative probability of each color with a given word and the strength of color association of the word, we estimate the probability of colors associated with a given text. The goal of this study is to propose a system to recommend the cognitively plausible colors for the meaning of the input text. To build a versatile and efficient database used by our system, two psychological experiments were conducted by using news site articles. In experiment 1, we collected 498 words which were chosen by the participants as having the strong association with color. Subsequently, we investigated which color was associated with each word in experiment 2. In addition to those data, we employed the estimated values of the strength of color association and the colors associated with the words included in a very large corpus of newspapers (approximately 130,000 words) based on the similarity between the words obtained by Latent Semantic Analysis (LSA). Therefore our method allows us to select colors for a large variety of words or sentences. Finally, we verified that our system cognitively succeeded in proposing the colors associated with the meaning of the input tort comparing the correct colors answered by participants with the estimated colors by our method. Our system is expected to be of use in various types of situations such as the data visualization, the information retrieval, the art or web pages design, and so on.
-
Izumi Yahata,Tetsuaki Kawase,Hiromitsu Miyazaki,Yusuke Takata,Daisuke Yamauchi,Kazuhiro Nomura,Yukio Katori 대한이비인후과학회 2015 Clinical and Experimental Otorhinolaryngology Vol.8 No.3
Objectives. To examine the relationship between speech intelligibilities among the similar level of hearing loss and threshold elevation of the auditory brainstem response (ABR). Methods. The relationship between maximum speech intelligibilities among similar levels of hearing loss and relative threshold elevation of the click-evoked ABR (ABR threshold – pure tone average at 2,000 and 4,000 Hz) was retrospectively reviewed in patients with sensorineural hearing loss (SNHL) other than apparent retrocochlear lesions as auditory neuropathy, vestibular schwannoma and the other brain lesions. Results. Comparison of the speech intelligibilities in subjects with similar levels of hearing loss found that the variation in maximum speech intelligibility was significantly correlated with the threshold elevation of the ABR. Conclusion. The present results appear to support the idea that variation in maximum speech intelligibility in patients with similar levels of SNHL may be related to the different degree of dysfunctions of the inner hair cells and/or cochlear nerves in addition to those of outer hair cells.
-
Yasushi Tsuji,Tetsuaki Fujihara 대한화학회 2007 Bulletin of the Korean Chemical Society Vol.28 No.11
This account reports an overview of our findings in homogeneous Pd-catalyzed reactions. Herein we describe the new design in reactions of Group 14 element compounds and in homogeneous nanosize Pd catalysts. In the early stages of our study, we developed Pd-catalyzed transformations of allylic esters with disilanes, silylcyanides and acylsilanes to the corresponding silylation, cyanation and acylation products, respectively. We also developed a Pd-catalyzed three component coupling reaction of Group 14 element compounds involving 1,3-diene and acid chlorides to form b,g -unsaturated ketone as a single product. Recently, we focus our attention on modifying the catalytic environment by nanosize Pd in order to improve the performance of Pd catalysts. These nanosystems realize efficient catalytic environment with remarkable enhancement in catalytic activity and unprecedented selectivity.
-
SHINJI KURIYAMA,TETSUAKI TAKEDA,SHUMPEI FUNATANI 한국원자력학회 2015 Nuclear Engineering and Technology Vol.47 No.5
In the very high temperature reactor (VHTR), which is a next generation nuclear reactorsystem, ceramics are used as a fuel coating material and graphite is used as a core structuralmaterial. Even if a depressurization accident occurs and the reactor power goes up instantly,the temperature of the core will change only slowly. This is because the thermal capacity ofthe core is so high. Therefore, the VHTR system can passively remove the decay heat of thecore by natural convection and radiation from the surface of the reactor pressure vessel. Theobjectives of this study are to investigate the heat transfer characteristics of natural convectionof a one-side heated vertical channel with inserted porous materials of high porosityand also to develop the passive cooling system for the VHTR. An experiment was carried outusing a one-side heated vertical rectangular channel. To obtain the heat transfer and fluidflow characteristics of the vertical channel with inserted porous material, we have alsocarried out a numerical analysis using a commercial Computational Fluid Dynamics (CFD)code. This paper describes the thermal performances of the one-side heated vertical rectangularchannel with an inserted copper wire of high porosity.
-
Tsuji, Yasushi,Fujihara, Tetsuaki Korean Chemical Society 2007 Bulletin of the Korean Chemical Society Vol.28 No.11
This account reports an overview of our findings in homogeneous Pd-catalyzed reactions. Herein we describe the new design in reactions of Group 14 element compounds and in homogeneous nanosize Pd catalysts. In the early stages of our study, we developed Pd-catalyzed transformations of allylic esters with disilanes, silylcyanides and acylsilanes to the corresponding silylation, cyanation and acylation products, respectively. We also developed a Pd-catalyzed three component coupling reaction of Group 14 element compounds involving 1,3-diene and acid chlorides to form β,γ-unsaturated ketone as a single product. Recently, we focus our attention on modifying the catalytic environment by nanosize Pd in order to improve the performance of Pd catalysts. These nanosystems realize efficient catalytic environment with remarkable enhancement in catalytic activity and unprecedented selectivity.
-
Color Recommendation for Text Based on Colors Associated with Words
Liba, Saki,Nakamura, Tetsuaki,Sakamoto, Maki Korea Society of Industrial Information Systems 2012 한국산업정보학회논문지 Vol.17 No.1
In this paper, we propose a new method to select colors representing the meaning of text contents based on the cognitive relation between words and colors, Our method is designed on the previous study revealing the existence of crucial words to estimate the colors associated with the meaning of text contents, Using the associative probability of each color with a given word and the strength of color association of the word, we estimate the probability of colors associated with a given text. The goal of this study is to propose a system to recommend the cognitively plausible colors for the meaning of the input text. To build a versatile and efficient database used by our system, two psychological experiments were conducted by using news site articles. In experiment 1, we collected 498 words which were chosen by the participants as having the strong association with color. Subsequently, we investigated which color was associated with each word in experiment 2. In addition to those data, we employed the estimated values of the strength of color association and the colors associated with the words included in a very large corpus of newspapers (approximately 130,000 words) based on the similarity between the words obtained by Latent Semantic Analysis (LSA). Therefore our method allows us to select colors for a large variety of words or sentences. Finally, we verified that our system cognitively succeeded in proposing the colors associated with the meaning of the input text, comparing the correct colors answered by participants with the estimated colors by our method. Our system is expected to be of use in various types of situations such as the data visualization, the information retrieval, the art or web pages design, and so on.
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
