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Study of.High Power ICRf.Antenna Design in LHD

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Plasma Science and Technology 2010年第1期12卷 15-19页

作者： Hiroshi KASAHARA Tetsuo SEKI Kenji SAITO Ryuhei KUMAZAWA Takashi MUTOH Goro NOMURA f.jio shimpo Shin KUBO Takashi SHIMOZUMA Yasuo YOSHIMURA Hiroe IGAMI Hiromi TAKAHASHI 赵燕平 Takuya OOSAKO Yuichi TAKASE National Institute f.r f.sion Science Institute of.Plasma Physics Chinese Academy of Sciences University of.Tokyo

In large helical device （LHD）, antenna loadings are dif.erent f.r minority ion cyclotron heating （MICH with 38.47 MHz） and mode-converted ion Bernstein wave heating （MC-IBW with 28.4 MHz）, and it is necessary to improve antenna loading with low heating ef.iciency to avoid arching on transmission line. To design a new ion cyclotron range of.f.equencies （ICRf. antenna in LHD, calculation f.r a simple antenna model is conducted using three-dimensional electrical magnetic code （high f.equency structure simulator, Hf.S） f.r an water loading as an imaginary plasma with low heating ef.iciency. At resonant f.equencies, antenna loading is sensitive to strap width, and resonant f.equencies are strongly related to strap height. There is no dif.erences of.Rf.current prof.le on the strap surf.ce between resonant f.equency and non-resonant f.equency. The strap should be perpendicularly placed against the magnetic f.eld line, since f.raday-shield angle will lead to a decrease in the ef.ective antenna height.

关键词： ICRf minority heating mode conversion heating antenna design LHD

Measurement of.Ion Cyclotron Emissions by Using High-f.equency Magnetic Probes in the LHD

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Plasma Science and Technology 2013年第3期15卷 209-212页

作者： Kenji SAITO Ryuhei KUMAZAWA Tetsuo SEKI Hiroshi KASAHARA Goro NOMURA f.jio shimpo Hiroe IGAMI Mitsutaka ISOBE Kunihiro OGAWA Kazuo TOI Masaki OSAKABE Masaki NISHIURA Tsuguhiro WATANABE Satoshi YAMAMOTO Makoto ICHIMURA Takashi MUTOH National Institute f.r f.sion Science Graduate School of.Engineering Nagoya University Institute of.Advanced Energy Kyoto University Tsukuba University Plasma Research Center

Two pairs of.high-f.equency magnetic probes were installed in the Large Helical Device （LHD）. During the injection of.a perpendicular neutral beam, ion cyclotron emissions （ICEs） with the f.ndamental f.equency corresponding to the ion cyclotron f.equency at the plasma edge were detected, which are the same type of.ICE as measured with the f.rmer spare ion cyclotron range of.f.equencies （ICRf. heating antennas. This type of.ICE was f.rther investigated with regard to the phase and intensity of.signals. Another type of.ICE was f.und in the LHD, and these ICEs were synchronized with bursts of.toroidicity induced Alf.^n eigenmodes （TAE） and the rise of.intensity of.lost ion f.ux. Theref.re the source of.these ICEs was thought to be the particles transf.rred f.om the core to the outer region of.plasma by the TAE bursts. The f.equency of.ICEs induced by the TAE bursts increases linearly with the magnetic f.eld strength, since the ion cyclotron f.equency increases with the magnetic f.eld strength.

关键词： LHD ICE TAE lost particle high-f.equency magnetic probe

A Detection Method of.Ships through a Navigational Image Sequence taken by Multi-Sensor Camera System

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A Detection Method of Ships through a Navigational Image Seq...

人工智能原则的作用——从非约束原则到普遍原则

Asia Navigation Conf.rence 2005

作者： Masatoshi shimpo Masato HIRASAWA Ayuko NAKAJIMA Yessy ARVELYNA Masaki OSHIMA Tokyo University of.Marine Science and Technology 2-1-6 Etchujima Koto-KuTokyo 135-8533Japan Tokyo University of.Marine Science and Technology 2-1-6 Etchujima Koto-KuTokyo 135-8533Japan Tokyo University of.Marine Science and Technology 2-1-6 Etchujima Koto-KuTokyo 135-8533Japan Tokyo University of.Marine Science and Technology 2-1-6 Etchujima Koto-KuTokyo 135-8533Japan Tokyo University of.Marine Science and Technology 2-1-6 Etchujima Koto-KuTokyo 135-8533Japan

＜正＞According to the statistic of.Japan Coast Guard, in 2003 the numbers of.marine accidents in Japan’s waters were 2500 or more. The marine accidents mostly occurred within 3 nautical miles f.om the coastal line or in the port were collision or stranding. Meanwhile 75% of.the marine accidents were caused by human error, due to insuf.icient lookout. To deal with this problem, we suggest the application of.image-processing techniques to automate the lookout system. The purpose of.this system is to prevent oversight of.lookout, theref.re the marine accidents can be minimized and the saf.ty and ef.iciency of.maritime vessel traf.ic can be assured. We proposed a detection method of.moving ships through a navigational image sequence taken by cameras installed at ship’s bridge. Since the image is inf.uenced by roll and pitch, the general image processing technique, such as Background Dif.erence method cannot be used. Moreover, in the images classif.cation sea waves appear as noise. So we proposed a novel technique to eliminate the inf.uence of.roll, pitch and sea waves in the images. Since the application of.the video camera causing insuf.icient exposure to light during the night, or the detection of.ships was dif.icult under rain condition, this system used the inf.ared camera together with the video camera. We verif.ed the advantage of.using the multi-sensor camera system composed of.the video camera with CCD （Charge Coupled Device） sensor and the inf.ared camera with bolometer sensor under rain condition in the twilight at Tokyo Bay.

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北京政法职业学院学报 2022年第1期 38-45页

作者： [日]新保史生余梦凝日本庆应大学

随着第三次AI热潮的到来,不同领域已经完成AI从研究开发到实际运用的过程,人们也逐渐认识到合理使用AI,其原则的重要性。充分利用新兴技术需要采取相应措施,通过完善基本法律,将非约束性的AI原则确定为基本原则或者作为法定公布事项将... 详细信息

随着第三次AI热潮的到来,不同领域已经完成AI从研究开发到实际运用的过程,人们也逐渐认识到合理使用AI,其原则的重要性。充分利用新兴技术需要采取相应措施,通过完善基本法律,将非约束性的AI原则确定为基本原则或者作为法定公布事项将其转化为实际规则不失为一种对策。在应对新问题制定新规则方面,EU走在世界前沿,参考EU经验对思考日本制定相关策略具有启发性。本文在阐述日本国内外AI原则、准则内容等基础上,考察EU研究动向、研讨EU《可信赖的AI伦理准则》的内容和《评价清单》、以及预示AI走向的《白皮书》内容,以此探寻未来日本AI法律规制的方向。审视OECD通过《AI理事会劝告》的意义以及在法律完善中参考无法律约束力的AI原则制定的《隐私准则》的地位,尽管仅为非约束性准则,鉴于OECD隐私八原则几乎成为各国相关法制的“参照系”,论证将非约束性AI原则确定为普遍性原则的必要性非常重要。

关键词： AI原则新兴技术非约束原则普通原则