Search Results 1-20 of 10068

  • Localization of a Rotating Magnetic Marker on the Basis of the Fourier Components of Its Magnetic Flux Density  [in Japanese]

    千葉 昭宏 , 奈良 高明

    屋内での高精度な位置情報は,工場での無人搬送車の制御や商業施設での人のナビゲーションなど,様々なアプリケーションにとって不可欠である.本研究では,回転する磁石を磁気マーカとして用いて,3軸磁気センサで観測される磁束密度の回転周波数に関するフーリエ成分から,磁気マーカの方位角,天頂角,距離を直接推定する手法を提案する.本手法では,磁気マーカの回転に関する位相を知ることなく定位可能で,センサとマーカと …

    情報処理学会論文誌 61(4), 968-977, 2020-04-15

    IPSJ 

  • 〈Reports〉Report on the Center for Distance Learning of Japanese and Japanese Issues 2019: An Overview of the Second Term and Plans for the Third Term  [in Japanese]

    伊藤 秀明 , 小野 正樹 , Hideaki ITO , Masaki ONO

    筑波大学グローバルコミュニケーション教育センター日本語教育論集 = Journal of Japanese Language Teaching (35), 33-44, 2020-03-25

    IR  DOI 

  • Study on Efficient Access Control in the 3D Drones Mesh Network.(Special Reserch Expenses for Graduate Students)  [in Japanese]

    設樂 勇

    … In this drone network, interference is reduced by forming a communication link between drones using a directional beam, realizing high bandwidth utilization efficiency. … However, when relaying to a straight path, there is a problem that the communication efficiency greatly decreases due to overreach interference. … We propose an access control method to improve communication efficiency. …

    日本工業大学研究報告 = Report of researches, Nippon Institute of Technology 49(4), 120-123, 2020-03

    IR 

  • An Investigation of Telegram Technique for Remote Communicating of Human Support Robot Application

    Alireza Ahmadi , W. Z. Wan Hasan , Hafiz Rashidi , Nur Liyana Aqmar , N. A. Ariffin

    Proceedings of Asia Pacific Conference on Robot IoT System Development and Platform (2019), 29-30, 2020-02-25

    IPSJ 

  • Team Formation Based on Reciprocity in Unbalanced Workload Environments  [in Japanese]

    SATO Koki , FUNATO Ryoya , SUGAWARA Toshiharu

    <p>本研究では、マルチエージェントシステムにおけるタスク割り当て問題をチーム編成問題と捉え、エリアの概念を導入したモデルを提案する。これまでのチーム編成問題において、チーム編成成功率向上と安定性を目指し、自分の役割と他のエージェントに対する信頼関係を自律的に学習し、協力関係を築く手法がある。しかし、その手法のモデルでは環境全体に一様にタスクが発生し、非均一なタスクの発生環境は考慮され …

    Proceedings of the Annual Conference of JSAI JSAI2020(0), 4G3GS702-4G3GS702, 2020

    J-STAGE 

  • A politeness control method for conversational agents considering social relationships with users  [in Japanese]

    MIYAMOTO Tomoki , KATAGAMI Daisuke , USAMI Mayumi

    <p>本稿では,会話エージェントが自律的に言語的配慮(ポライトネス)を制御する手法を提案する.提案手法を実現するためのアプローチとして,社会言語学におけるポライトネス理論に基づいて,エージェントがポライトネスを制御するうえで有効と考えられる入力情報について検討を行った.その結果,特に性別/年齢などユーザの属性情報や会話場面のフォーマルさの度合いや文化を活用して,エージェントがユーザとの …

    Proceedings of the Annual Conference of JSAI JSAI2020(0), 2G6ES301-2G6ES301, 2020

    J-STAGE 

  • Emergence of resource sharing strategies based on acoustic interactions in evolution of virtual creatures  [in Japanese]

    BANNO Takahiro , SUZUKI Reiji , ARITA Takaya

    <p>我々は,自然に偏在する音響ノイズを起源とする音声コミュニケーションの進化シナリオを検討するため,物理接触による音の発生を取り入れた3次元仮想生物進化環境を構築している.生物は直方体を接続して構成され,各ブロックは他個体を認識する視覚とブロック同士や地面との接触で発生する音を認識する聴覚をセンサとして持つ.センサ情報はブロック内の神経結合で処理されブロック間の関節へのトルクに反映さ …

    Proceedings of the Annual Conference of JSAI JSAI2020(0), 1O3GS803-1O3GS803, 2020

    J-STAGE 

  • Design for Long-Reach Coexisting PON considering Subscriber Distribution with Wavelength Selective Asymmetrical Splitters

    HARA Kazutaka , KAWAKITA Atsuko , KIMURA Yasutaka , SUZUKI Yasuhiro , IKEDA Satoshi , TSUJI Kohji

    … Simulations confirm the key features of WS-ASP, its novel process for deriving the splitting ratios and greater transmission distance than possible with symmetrical splitters. … The values measured in the experiment agree well with the simulation results with respect to the transmission distance.</p> …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • Ultra-Low Crosstalk Multi-core Fiber with Standard 125-μm Cladding Diameter for 10,000 km-class Long-haul Transmission

    SAGAE Yuto , MATSUI Takashi , SAKAMOTO Taiji , NAKAJIMA Kazuhide

    … Finally, we show that fabricating the MCF is feasible along with long-distance transmission by confirming the that the XT noise performance corresponds to transmission distances of 10,000 km or more.</p> …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • Reach Extension of 10G-EPON Upstream Transmission using Distributed Raman Amplification and SOA

    IGARASHI Ryo , FUJIWARA Masamichi , KANAI Takuya , SUZUKI Hiro , KANI Jun-ichi , TERADA Jun

    … Drastically reducing the number of small-scale communication buildings while keeping the number of accommodated users is one of the most attractive solutions to meet this situation. … Our simulations assuming 10G-EPON specifications and transmission experiments on a 10G-EPON prototype confirm that configuration (i) can add a 17 km trunk fiber to a normal PON system with 10 km access reach and 1:64 split (total 27 km reach), while configuration (ii) can further expand the trunk fiber distance to 37 km (total 47 km reach). …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • Development of a Long-Distance Millimeter-wave Transmission System for a Low-cost Mas Driver: Microwave Rocket  [in Japanese]

    FUKUNARI Masafumi , YAMAGUCHI Toshikazu , KOMURASAKI Kimiya , ODA Yasuhisa , IKEDA Ryosuke , KAJIWARA Ken , TAKAHASHI Koji , SAKAMOTO Keishi

    <p> マイクロ波ロケットは地上より照射されたミリ波をエネルギーとして飛行するビーミング推進ロケットである.本研究では八角錐形状のテーパー管型受電器からなる長距離ミリ波伝送系を用いてマルチパルス運転での推力試験を行った.推力試験では,ミリ波繰り返し周波数が70 Hzから100 Hzの付近で異常着火が発生し,この異常着火によりデューティ比の上限が制限されることが分かった.推力試験での最大 …

    Space Solar Power Systems 5(0), 96-100, 2020

    J-STAGE 

  • Low-Complexity DBP Using Optical-field-intensity Averaging for Digital Coherent System

    Takano Shin , Uenohara Hiroyuki

    … Our proposed method achieves a complexity 50.8% less than that of conventional digital backpropagation at a transmission distance of 2400 km and a launched power of -2 dBm.</p> …

    IEICE Communications Express, 2020

    J-STAGE 

  • Proposal on The Method to Improve The Reliability of Approach/Departure Judgment to The Signal Source by RSSI  [in Japanese]

    Ishii Kazuyuki , Sato Naoshi , Matsui Toshihiro

    … <p>The received signal strength indicator (RSSI) is used to estimate the distance between a transmitter and receiver. …

    IEEJ Transactions on Electronics, Information and Systems 140(6), 600-608, 2020

    J-STAGE 

  • Multiple Human Tracking Using an Omnidirectional Camera with Local Rectification and World Coordinates Representation

    NISHIMURA Hitoshi , MAKIBUCHI Naoya , TASAKA Kazuyuki , KAWANISHI Yasutomo , MURASE Hiroshi

    … ii) The position and size change dramatically between consecutive frames because the distance metric is non-uniform in an omnidirectional image. … ii) For distance calculation, we describe the positions in a world coordinate system where the distance metric is uniform. …

    IEICE Transactions on Information and Systems E103.D(6), 1265-1275, 2020

    J-STAGE 

  • Improving the Accuracy of Spectrum-Based Fault Localization Using Multiple Rules

    WANG Rongcun , JIANG Shujuan , ZHANG Kun , YU Qiao

    … Therefore, we proposed 5 rules, i.e., <i>random</i>, <i>the maximum coverage</i>, <i>the minimum coverage</i>, <i>the maximum distance</i>, and <i>the minimum distance</i>, to improve the accuracy of SBFL for further. …

    IEICE Transactions on Information and Systems E103.D(6), 1328-1338, 2020

    J-STAGE 

  • Evaluation of Electromagnetic Noise Emitted from Light-Emitting Diode (LED) Lamps and Compatibility with Wireless Medical Telemetry Service

    ISHIDA Kai , WU Ifong , GOTOH Kaoru , MATSUMOTO Yasushi

    … <p>Wireless medical telemetry service (WMTS) is an important wireless communication system in healthcare facilities. … Finally, we roughly estimated the offset distance between the receiving antenna of WMTS and LED lamps when a WMTS signal of a certain level was added in a clinical setting using our experimental result for the required CNR.</p> …

    IEICE Transactions on Communications E103.B(6), 637-644, 2020

    J-STAGE 

  • Rapid Revolution Speed Control of the Brushless DC Motor for Automotive LIDAR Applications

    AKITA Hironobu , KIMOTO Tsunenobu

    … In order to improve its performance of the measurable distance, especially toward the front-side direction of the vehicle, this paper presents rapid revolution speed control of a brushless DC (BLDC) motor with a cyclostationary command signal. …

    IEICE Transactions on Electronics E103.C(6), 324-331, 2020

    J-STAGE 

  • Feasibility of Electric Double-Layer Coupler for Wireless Power Transfer under Seawater

    TAMURA Masaya , MURAI Kousuke , MATSUKAMI Hiroaki

    … Last, demonstrate that the designed coupler under seawater can achieve over 85% efficiency at a transfer distance of 5 mm and feasibility of the coupler with EDL.</p> …

    IEICE Transactions on Electronics E103.C(6), 308-316, 2020

    J-STAGE 

  • Nonlinearity mitigation of PDM-16QAM signals using multiple CSI-OPCs in ultra-long-haul transmission without excess penalty

    Umeki Takeshi , Kobayashi Takayuki , Sano Akihide , Ikuta Takuya , Abe Masashi , Kazama Takushi , Enbutsu Koji , Kasahara Ryoichi , Miyamoto Yutaka

    … We then demonstrated transmission distance extension using the CSI-OPC device. … The use of multiple CSI-OPCs enables an obvious performance improvements attained by extending the transmission distance from 6,400 km to 8,960 km, which corresponds to applying the CSI-OPC device 28 times. …

    IEICE Transactions on Communications, 2020

    J-STAGE 

  • Ironworks Conveyor Monitoring Using Mirror-drive High-speed Active Vision

    Tang Zhengmi , Shimasaki Kohei , Jiang Mingjun , Takaki Takeshi , Ishii Idaku , Koga Aoi , Matsuda Hiroshi

    … The small deflections and vibrations, in multiple belts and pillars, which have peak frequencies of 10 Hz or more are estimated with a precision of dozens of micrometers using image analysis techniques such as digital image correlation when the camera system is placed at a distance of 5 m or more from the conveyor.</p> …

    ISIJ International 60(5), 960-970, 2020

    J-STAGE 

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