http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hata, Satoshi,Nagai, Naoyuki,Yasui, Toyoaki,Tsukamoto, Hiroshi Korean Society for Fluid machinery 2008 International journal of fluid machinery and syste Vol.1 No.1
For mechanical drive steam turbines, the investigation results of corrosion fatigue phenomena in the transient zone are introduced, including basic phenomena on expansion line and actual design and damage experience. These results were analyzed from the standpoint of stress intensity during the start of cracking. In order to resolve such problems, preventive coating and blade design methods against fouling and corrosive environments are developed. Detailed evaluation test results are given for coating performance using a unique test procedure simulating fouling phenomena and washing conditions. Finally, the results of the successful modification of internals and on-line washing results on site are introduced.
The Use of Transabdominal Ultrasound in Inflammatory Bowel Disease
Hata Jiro,Imamura Hiroshi 대한영상의학회 2022 Korean Journal of Radiology Vol.23 No.3
Transabdominal ultrasound (TAUS) is useful in all aspects of lesion screening, monitoring activity, or treating/diagnosing any related complications of inflammatory bowel disease. Its ability to screen or diagnose complications is almost the same as that of other methods, such as CT or MRI. Moreover, its noninvasiveness makes it a first-line examination method. A TAUS image depicting ulcerative colitis will show large intestinal wall thickening that is continuous from the rectum, which is mainly due to mucosal layer thickening, while for Crohn’s disease, a TAUS image is characterized by a diversity in the areas affected, distribution, and layer structure. Indicators of activity monitoring include wall thickness, wall structure, and vascular tests that use Doppler ultrasound or contrast agents. While all of these have been reported to be useful, at this time, no single parameter has been established as superior to others; therefore, a comprehensive evaluation of these parameters is justified. In addition, evaluating the elasticity of lesions using elastography is particularly useful for distinguishing between fibrous and inflammatory stenoses. However, the lack of objectivity is the biggest drawback of using ultrasound. Standardizing and popularizing the ultrasound process will be necessary, including scanning methods, equipment settings, and image analysis.
Dynamic Chest X-Ray Using a Flat-Panel Detector System: Technique and Applications
Hata Akinori,Yamada Yoshitake,Tanaka Rie,Nishino Mizuki,Hida Tomoyuki,Hino Takuya,Ueyama Masako,Yanagawa Masahiro,Kamitani Takeshi,Kurosaki Atsuko,Sanada Shigeru,Jinzaki Masahiro,Ishigami Kousei,Tomiy 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.4
Dynamic X-ray (DXR) is a functional imaging technique that uses sequential images obtained by a flat-panel detector (FPD). This article aims to describe the mechanism of DXR and the analysis methods used as well as review the clinical evidence for its use. DXR analyzes dynamic changes on the basis of X-ray translucency and can be used for analysis of diaphragmatic kinetics, ventilation, and lung perfusion. It offers many advantages such as a high temporal resolution and flexibility in body positioning. Many clinical studies have reported the feasibility of DXR and its characteristic findings in pulmonary diseases. DXR may serve as an alternative to pulmonary function tests in patients requiring contact inhibition, including patients with suspected or confirmed coronavirus disease 2019 or other infectious diseases. Thus, DXR has a great potential to play an important role in the clinical setting. Further investigations are needed to utilize DXR more effectively and to establish it as a valuable diagnostic tool.
takaki Hatae,H. Yoshida,M. Nakatsuka,O. Naito,S. Kitamura,T. Hamano,T. Sakuma 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
Phase conjugate mirror based on stimulated Brillouin scattering (SBS) is a fundamentally new and promising technology, and it is applicable to plasma diagnostics in order to improve the measurement performance. A review is presented about the applications of SBS phase conjugation to Thomson scattering diagnostics in JT-60U and ITER. Proposed applications using the phase conjugate mirror to plasma diagnostics, namely double-pass and multipass Thomson scattering methods, were described. Improvement of diagnostic laser system for Thomson scattering employing the phase conjugate mirror are also described.I
Vision System for Cloth Handling Robot
Seiji Hata,Takehisa Hiroyasu,Jun’ichiro Hayashi,Hirotaka Hojoh,Toshihiro Hamada 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Flexible objects such as clothes are hard to be handled by robots. But the working conditions forlaundry factories are severe because of dusts, heats and steams, and full automation systems which can handle clothesare required. To automate these factories, 3-D Vision systems are dispensable to recognize the 3-D shape of flexible clothes. There are three steps to handle clothes by robots. They are ; (1) to pick up one cloth from piled clothes, (2) tograsp one corner of a cloth, (3) to grasp one edge of a cloth. The requirements for vision systems at these steps of the cloth handling have been analyzed and the vision algorithms have been developed.
Current Testable Design of Resistor String DACs for Open Defects
Yutaka Hata,Masaki Hashizume,Hiroyuki Yotsuyanagi,Yukiya Miura 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, a DFT method of resistor string digital-to-analog converters (DACs) is proposed so as to be tested fully by supply current testing. Targeted defects are opens in the DACs. Testability of opens in testable designed DACs is examined experimentally. The results show that all of the opens in an N-bits testable designed DAC will be detected with test vectors of about 2(N-1) by supply current testing.
S. Hata,Y. Miura,T. Ise 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
In this paper, a new family of zero-current-transition (ZCT) power factor correction (PFC) converters is introduced. The proposed converter operates in discrete conduction mode (DCM) and provides soft switching for the main switch and the auxiliary switch with a small inductor and capacitor even in high power / high voltage application. The auxiliary circuit of proposed converter operates for an enough short time compared with the switching period. Furthermore, the auxiliary circuit maintains an almost constant operation time during a power line cycle. As a result, the proposed converter can reduce the losses of the auxiliary circuit. In this study, a steady-state analysis of the proposed converter is described, and features of this converter are compared to ones of zero-voltage-transition (ZVT) converter in theory. These theoretical analyses are verified by a prototype converter.