Search Results 1-20 of 59

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  • Research and Technical Developments on the Tidal Power Generation : Counter-Rotating Type Stream Power Unit  [in Japanese]

    左村 公

    ターボ機械 = Turbomachinery 47(11), 664-670, 2019-11

  • High Performance Application Specific Stream Architecture for Hardware Acceleration of HOG-SVM on FPGA

    RANAWAKA Piyumal , EKPANYAPONG Mongkol , TAVARES Adriano , DAILEY Mathew , ATHIKULWONGSE Krit , SILVA Vitor

    … <p>Conventional sequential processing on software with a general purpose CPU has become significantly insufficient for certain heavy computations due to the high demand of processing power to deliver adequate throughput and performance. … Histogram of Oriented Gradients (HOG) technique combined with a Support Vector Machine (SVM) based classifier is versatile and extremely popular in computer vision domain in contrast to high demand for processing power. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(12), 1792-1803, 2019

    J-STAGE 

  • Up-Stream Dispatching of Power by Density of Power Packet

    NAWATA Shinya , TAKAHASHI Ryo , HIKIHARA Takashi

    … <p>Power packet is a unit of electric power transferred by a pulse with an information tag. … This letter discusses up-stream dispatching of required power at loads to sources through density modulation of power packet. … Here, power is adjusted at a proposed router which dispatches power packets according to the tags. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E99.A(12), 2581-2584, 2016

    IR  J-STAGE 

  • Energy recovery in the high temperature furnace using a high-emittance fiber (HEF) unit  [in Japanese]

    KOJIMA Takumi , SAKAI Jun , SHIMIZU Makoto , IGUCHI Fumitada , YUGAMI Hiroo , IGUCHI Hironaga , HISAYUKI Terumi , NAKAGAWA Narihito , YAMAMURA Takemi

    … We have studied the energy recovery effect in high-temperature furnace using a high-emittance fiber (HEF) unit. … Previous studies have shown that energy recovery effect occurs as placing the HEF unit perpendicular to the gas flow. … In this study, we examined the energy recovery effect and mechanisms of the effect when HEF unit placed in parallel to the gas stream. …

    Transactions of the JSME (in Japanese) 82(838), 15-00588-15-00588, 2016

    J-STAGE 

  • Performance Research of Counter-rotating Tidal Stream Power Unit

    Wei Xuesong , Huang Bin , Liu Pin , Kanemoto Toshiaki

    … An experimental investigation was carried out to improve the performance of a counter-rotating type horizontal-axis tidal stream power unit. … Three different groups of blades were designed successively, and the results showed that Group3 possessed the highest power coefficient of 0.44 and was the most satisfactory model. …

    International Journal of Fluid Machinery and Systems 9(2), 129-136, 2016

    J-STAGE 

  • The evaluation of small hydroelectric generation unit price in a mountain stream through the use of runoff analysis  [in Japanese]

    TOYODA Yasushi , SATO Takahiro , ISII Takashi , ARAI Ryosuke

    小水力発電は温室効果ガスを排出しない純国産自然エネルギー発電である一方,我が国には発電に適した地点が多く残されている.その主な理由として観測流量の不備と発電単価評価の困難さが挙げられる.本研究では流出解析モデルにより流況の計算を行い,小水力発電に必要な落差および発電設備等の導入コストの評価から発電単価を計算できる評価システムを構築した.岐阜県の亀尾島川をケーススタディーとして,流出解析モデルの再現 …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 71(5), I_247-I_255, 2015

    J-STAGE 

  • ICOPE-15-1176 Cycle and Turbine Development for the Supercritical Carbon Dioxide Allam Cycle

    Nomoto Hideo , Itoh Masao , Brown William , Fetvedt Jeremy , Sato Iwataro

    … It is very important to decrease CO_2 emissions from fossil-fueled power plants while pursuing economically competitive solutions. … To achieve these goals, the authors are developing, with other partners, a highly efficient and economical semi-closed power cycle using supercritical carbon dioxide as a working fluid. … Major components of this cycle include an air separation unit, turbine and combustor, generator, compressor, pump, and economizer heat exchanger. …

    The Proceedings of the International Conference on Power Engineering (ICOPE) 2015.12(0), _ICOPE-15--_ICOPE-15-, 2015

    J-STAGE 

  • Transmitter model and its characteristic analysis for simplified terahertz ultra-wideband communications by using tunnel devices  [in Japanese]

    ASAKAWA Kiyoto , YAMAKURA Hirokazu , KATO Yuto , IMORI Kaori , SAITO Mitsufumi , SUHARA Michihiko

    近年、ウェアラブル端末やfog/edge computingといった新たな通信端末、ネットワークサービスが登場してきており、近距離無線通信の利用頻度は益々増加する事が予想される。こうした中、テラヘルツ帯を用いた大容量・高速無線通信は今後の機器間、端末間のデータ通信に期待されている技術であり、特に小型端末へ搭載可能な小型・低消費電力テラヘルツ無線通信システムが望まれる場合が少なくないと考えられる。我 …

    IEICE technical report. Electron devices 114(387), 3-8, 2014-12-22

  • A fully digital clock and data recovery with fast frequency offset acquisition technique for MIPI LLI applications

    Lee June-Hee , Kim Sang-Hoon , Jun Young-Hyun , Kwon Kee-Won , Chun Jung-Hoon

    … An elastic FIFO for the oversampled multi-phase data stream is not needed, because the proposed offset estimator can compensate for frequency offset instead. … With a frequency offset ranging from −60,000ppm to +60,000ppm, the proposed CDR has a very fast and almost constant lock acquisition time of less than 15 unit intervals and a short recovery logic latency of 1 unit interval. … It consumes 5.1mW from a 1.2-V power supply at 5.8Gb/s. …

    IEICE Electronics Express 10(10), 20130178-20130178, 2013

    J-STAGE 

  • 1001 Development of Counter-Rotating Type Tidal Stream Power Unit  [in Japanese]

    TAKAKI Kohei , USUI Yuta , KANEMOTO Toshiaki

    … The authors have invented a unique counter-rotating type tidal stream power unit composed of tandem propellers and a double rotational armature type peculiar generator without the traditional stator. … The unit has the fruitful advantages that not only the output is sufficiently higher, but also the rotational moment hardly act on the pillar because the rotational torque of both propellers/armatures are counter-balanced in the unit. …

    The Proceedings of the Fluids engineering conference 2013(0), _1001-01_-_1001-02_, 2013

    J-STAGE 

  • Reconfiguration Process Optimization of Dynamically Coarse Grain Reconfigurable Architecture for Multimedia Applications

    LIU Bo , CAO Peng , ZHU Min , YANG Jun , LIU Leibo , WEI Shaojun , SHI Longxing

    … Two Reconfigurable Processor Units (RPUs) for accelerating computing-intensive tasks and a Micro-Processor Unit (µPU) for accelerating control-intensive tasks are contained in REMUS-II. … Based on RTL simulation, REMUS-II can support the 1080p@32fps of H.264 HiP@Level4 and 1080p@40fps High-level MPEG-2 stream decoding at the clock frequency of 200MHz. … and the estimated on-chip dynamic power is 620mW. …

    IEICE Transactions on Information and Systems 95(7), 1858-1871, 2012-07-01

    J-STAGE  References (24)

  • High-Speed and Low-Power Design of a Singular Value Decomposition Processor for SVD-MIMO-OFDM Systems  [in Japanese]

    IWAIZUMI Hiroki , YOSHIZAWA Shingo , MIYANAGA Yoshikazu

    本稿では,SVD-MIMO-OFDMシステムの実現に必要な特異値分解及びフィードバック行列の圧縮・再構成を行うプロセッサを提案する.SVD-MIMOとはビームフォーミング伝送によりストリーム間干渉を抑制し,MIMOシステムの通信品質を大幅に改善することができる伝送方式である.従来の特異値分解プロセッサは計算に多くの時間を要するため実時間処理には不向きであった.提案プロセッサは設計にASIPアーキテ …

    電子情報通信学会技術研究報告. SIS, スマートインフォメディアシステム 112(78), 13-18, 2012-06-07

    References (8)

  • Evaluation of vulnerability of mangrove habitats using predictive habitat distribution model in Palau Islands  [in Japanese]

    TAKEMURA Shion , AKAMATSU Yoshihisa , KAMADA Mahito

    パラオ諸島におけるマングローブの生育地としての干潟の形成と安定性に関わる流域特性を用いて潜在的生育地を推定し,広域的視点から生育地の脆弱度評価を行った.流域特性として土砂供給,土砂堆積,そして波の静寂性に関わる要因をGISを用いて算出した.そして一般化線形モデルを用いて流域内に生育可能なマングローブ生育地面積の推定を行った.その結果,流域山地部からの土砂供給量が多く,平野部の土砂堆積容量が十分で, …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 68(5), I_105-I_110, 2012

    J-STAGE 

  • Physical Modeling Study on Combined Side and Top Blowing AOD Refining Process of Stainless Steel : Fluid Mixing Characteristics in Bath

    WEI Ji-He , ZHU Hong-Li , CHI He-Bing , WANG Hai-Jiang

    … Based on water modeling of the gas stirring and fluid flow in the bath, the fluid mixing characteristics in the bath during the combined side and top blowing AOD refining process of stainless steel were studied on a water model unit of a 120 t AOD converter. … Moreover, it could make the high temperature zone move towards the sidewall around the tuyere outlets and lower the life of the refractory lining due to reducing the gas flow rate of single tuyere and the horizontal penetration of the gas stream. …

    ISIJ International 50(1), 26-34, 2010-01-15

    J-STAGE  References (9)

  • A301 HEAT TRANSFER CHARACTERISTICS OF INTERNALLY FINNED TUBE(Heat Transfer-1)

    SARADA Yukihiro , MATUMOTO Ryosuke , OZAWA Mamoru

    … The enhancement in heat transfer was mainly caused by the edge effect and resultant suppression of boundary layer development by splitting fins in several units as well as the mixing and/or agitation of the gas stream across the cross-section. … The number of heat transfer unit, NTU, being actually a heat transfer rate, reaches around 15 times of the bare tube without internal fin. …

    The Proceedings of the International Conference on Power Engineering (ICOPE) 2009.3(0), _3-1_-_3-6_, 2009

    J-STAGE 

  • Study of compact rotation power unit using small head water stream at open channel  [in Japanese]

    平 栄蔵 , 田中 康雄 , 永吉 克己 [他]

    研究報告 (53), 33-37, 2008

  • 806 Development of Yawing Type Hydroelectric Unit(2)  [in Japanese]

    ISHIHARA Hiroaki , GOTO Naofumi , KANEMOTO Toshiaki

    … The waterpower has larger energy density than another renewable energy sources, and there are many hydroelectric power stations. … This research develops a new type hydroelectric unit with some submerged blades which yaw in the right and left against the stream of rivers, irrigation channels, and so on. … In this report, the concepts of the unit are presented, and the output characteristics and the flow conditions are discussed experimentally and numerically …

    The Proceedings of the Fluids engineering conference 2007(0), _806-1_-_806-4_, 2007

    J-STAGE 

  • 1718 Development of Yawing Type Hydraulic Turbine  [in Japanese]

    ISHIHARA Hiroaki , GOTO Naofumi , KANEMOTO Toshiaki

    … The waterpower has larger energy density than the wind power and the solar power, and there are many hydroelectric power stations. … This research develops a new type hydroelectric unit with some submerged blades which yaw in the right and left against the stream of rivers, irrigation channels, and so on. …

    The proceedings of the JSME annual meeting 2007.2(0), 343-344, 2007

    J-STAGE 

  • Dynamic Re-configurable Architecture PCA for Stream Processing  [in Japanese]

    OGURI Kiyoshi

    さまざまな技術も最終的には物理的な実装によってその最終的な性能が決まり,有用度が定まる.データを一旦メモリLSI上に配置して,このデータを論理LSI上に設けた演算回路を使って加工する方式,たとえばコンピュータのソフトウェアによる処理方式ではデータをメモリLSIと論理LSIの間で何度も往復させる必要がある.一方,FPGA(Field Programmable Gate Array)等の再構成可能論理 …

    IPSJ SIG Notes 109, 13-18, 2006-11-21

  • Dynamic Re-configurable Architecture PCA for Stream Processing  [in Japanese]

    OGURI Kiyoshi

    さまざまな技術も最終的には物理的な実装によってその最終的な性能が決まり,有用度が定まる.データを一旦メモリLSI上に配置して,このデータを論理LSI上に設けた演算回路を使って加工する方式,たとえばコンピュータのソフトウェアによる処理方式ではデータをメモリLSIと論理LSIの間で何度も往復させる必要がある.一方,FPGA(Field Programmable Gate Array)等の再構成可能論理 …

    IEICE technical report 106(368), 19-24, 2006-11-14

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