Search Results:　 1-20 of 748

  • 1

    Non-contact R-test with laser displacement sensors for error calibration of five-axis machine tools

    Hong Cefu , Ibaraki Soichi

    … Its application to error calibration for five-axis machine tools has been studied in both academia and industry. … The compensation of measurement error of a laser displacement sensor due to the curvature of target sphere is incorporated. …

    Precision Engineering 37(1), 159-171, 2013-01-00

    IR CrossRef

  • 2

    Accuracy Evaluation of Camera Calibration for AR/MR by Projection Error of 3D Points in the Scene  [in Japanese]

    林 将之 , 北原 格 , 亀田 能成 他

    電子情報通信学会技術研究報告 : 信学技報 112(221), 43-48, 2012-09-27

  • 3

    Texture Classification Algorithm Using RGB Characteristics of Soil Images

    Chung Sun–Ok , Cho Ki–Hyun , Cho Jin–Woong , Jung Ki–Youl , Yamakawa Takeo , 山川 武夫

    … When 5%–averaged silt content was linearly regressed with "mode–brightness", squared correlation coefficient (R2), root mean square error of calibration (RMSEC), and root mean squared error of prediction (RMSEP) were 0.96, 2.2%, and 6.3%, respectively. …

    Journal of the Faculty of Agriculture, Kyushu University 57(2), 393-397, 2012-09-20

    IR

  • 4

    Influence on Measurements of Pre-irradiation Due to Differences in Ionization Chamber Shape or Frequency in Use  [in Japanese]

    SHIMONO Tetsunori , NAMBU Hidekazu , MATSUBARA Kosuke , KOSHIDA Kichiro , GOMI Tsutomu

    … Pre-irradiation of small ionization chambers is clearly warranted for eliminating inadvertent error in the calibration of radiation beams. …

    Japanese Journal of Radiological Technology 68(8), 986-996, 2012-08-20

    J-STAGE Ichushi Web CrossRef References (10)

  • 5

    Study of three-dimensional measurement of theeth and dentition size using stereo method  [in Japanese]

    FUKUI Hisao , ISHIKAWA Eiji , TOYAMA Masashi , SUGIMURA Toyohiko , KAWAMURA Jun , NAITOH Munetaka , YOKOI Yukiko

    映像の光軸移動に伴う画面での被写体の変異を利用した長さまたは座標計測システムについて,歯列模型を用いて至近接写した場合の検討を行った.本研究は,簡便で安定なキャリブレーション方法を用いたステレオカメラ計測システムの開発である.本システムの計測精度をノギスと歯列模型を用いて検証し,映像による寸法計測への有用性を検討した.その結果,カメラ-ノギス間距離を350〜550mmとした場合,ノギス本尺30.0 …

    The journal of the Japanese Society for Dental Materials and Devices 31(4), 332-338, 2012-07-25

    CiNii Fulltext PDF - Subscription  Ichushi Web

  • 6

    Calibration of location errors of rotary axes on five-axis machine tools by on-the-machine measurement using a touch-trigger probe

    Ibaraki Soichi , Iritani Takeyuki , Matsushita Tetsuya

    … As a basis to improve the motion accuracy of five-axis machining centers, it is important to develop a methodology to calibrate location errors of rotary axes, one of the fundamental error sources in the five-axis kinematics, in an accurate, efficient, and automated manner. …

    International Journal of Machine Tools and Manufacture 58, 44-53, 2012-07-00

    IR CrossRef

  • 7

    A Cone Based Electromagnetic 3D Ultrasound Calibration

    Xu Rong , Ohya Jun , Zhang Bo , Sato Yoshinobu , Fujie Masakatsu G.

    … For a surgical navigation system with swept-volume 3D ultrasound images, it is necessary to estimate the extracted positions of ultrasound voxels relative to a tracking reference by a 3D ultrasoud calibration. … In this paper, we propose a cone based 3D ultrasound calibration system by using an electromagnetic tracking device. …

    Technical report of IEICE. PRMU 111(499), 253-258, 2012-03-22

    CiNii Fulltext PDF - Limited 

  • 8

    A Cone Based Electromagnetic 3D Ultrasound Calibration

    Xu Rong , Ohya Jun , Zhang Bo , Sato Yoshinobu , Fujie Masakatsu G.

    … For a surgical navigation system with swept-volume 3D ultrasound images, it is necessary to estimate the extracted positions of ultrasound voxels relative to a tracking reference by a 3D ultrasoud calibration. … In this paper, we propose a cone based 3D ultrasound calibration system by using an electromagnetic tracking device. …

    Technical report of IEICE. HIP 111(500), 253-258, 2012-03-22

    CiNii Fulltext PDF - Limited 

  • 9

    A Method for Estimation of Three-Dimensional Eye Rotations with the Feature Points on the Eyeball  [in Japanese]

    KIHARA Takashi , HIKITA Shinichi , KOBAYASHI Yasuhide , ONO Takahiko , SAITO Mitsuyuki

    眼球の3種類の回転運動(水平・垂直・回旋)を3次元眼球運動と呼ぶ.本研究では眼球表面上の毛細血管の分岐点や虹彩の縁などを特徴点として利用することを想定した新たな3次元眼球運動推定法を提案する.視線方向は,眼球回転中心と眼球表面上にある視線ベクトルの先端位置から計算する.眼球の回転中心は視線を移動させたときの眼球の回転前後の各特徴点の位置から計算され,特徴点と視線ベクトルの先端の位置関係は視角が既知 …

    IEICE technical report. ME and bio cybernetics 111(482), 193-196, 2012-03-07

    CiNii Fulltext PDF - Limited 

  • 10

    Estimation of Gaze Position on the Target Plane with Three Points Calibration Based on the Pupil Center  [in Japanese]

    YAMASHITA Junya , HIKITA Shinichi , KOBAYASHI Yasuhide , ONO Takahiko , SAITO Mitsuyuki

    平面上の3点の視覚目標を注視したときの瞳孔中心の2次元位置から視線と平面との交点(注視点)を推定する方法を提案する.視線ベクトルの推定とターゲット平面の推定を組み合わせて同時に行ない,利便性と位置精度の向上を目指す.眼から430mm離れた平面上にある視標(被験者が見て水平±30deg,垂直±10degの範囲)を用いて精度評価実験を行ったところ,キャリブレーションに3点を用いた場合は,水平位置の平均 …

    IEICE technical report. ME and bio cybernetics 111(482), 189-192, 2012-03-07

    CiNii Fulltext PDF - Limited 

  • 11

    On-site Catalytic Determination of Trace Chromium (VI) in Fresh Water Using o-Phenylenediamine-Hydrogen Peroxide Reaction  [in Japanese]

    SHINDO Junpei , KAWAKUBO Susumu , YAMANOI Takashi , SUZUKI Yasutada

    試料を採取現場で分析する方法は環境汚染の監視に有用であるが，環境基準濃度を測定できる高感度な方法は少ない．本研究では，過酸化水素によるo-フェニレンジアミン（OPDA）の酸化反応におけるクロム（VI）の触媒作用を利用し，反応10分後に生成したOPDA酸化物の吸光度を430 nmで測定するクロム（VI）の定量法を開発した．本法の検出限界は1 μg L－1で，0～1 mg L－1が定量で …

    BUNSEKI KAGAKU 61(2), 103-108, 2012-02-05

    J-STAGE CrossRef References (16)

  • 12

    A NOVEL PROJECTOR CALIBRATION METHOD BASED ON IMPROVED TWO-FREQUENCY GRATING PROJECTION

    CHEN YANJUN , WANG KUANQUAN , ZUO WANGMENG 他

    ICIC express letters. an international journal of research and surveys. Part B, Applications : 3(1), 71-76, 2012-02-00

  • 13

    Visual Feedback Stabilization of Balancing Tasks with Camera Misalignment  [in Japanese]

    HIRATA Kentaro , MIZUNO Takashi

    … Such a task is known to rely heavily on the detection of the vertical direction and the angle measurement error due to the camera misalignment could be fatal for stabilization. … From a mathematical model of the measurement error, the effect of the misalignment is naturally represented by affine perturbation to the coefficient matrix of the output equation. …

    Transactions of the Institute of Systems, Control and Information Engineers 25(1), 10-18, 2012-01-15

    J-STAGE CrossRef References (19)

  • 14

    Accurate Surface Change Detection Method Using Phase of Coherence Function on SAR Imagery

    HOSHINO Takehiro , KIDERA Shouhei , KIRIMOTO Tetsuo

    … Furthermore, we introduce a pre-processing calibration method to compensate the bias error for the coherence phase which resulting mainly from the orbit error of the antenna platform. …

    IEICE Transactions on Communications 95(1), 263-270, 2012-01-01

    J-STAGE CrossRef References (11)

  • 15

    Using Terahertz Reflectance Spectroscopy to Quantify Drug Substance in Tablets

    Hisazumi Jin , Watanabe Tomoyuki , Suzuki Tatsuya , Wakiyama Naoki , Terada Katsuhide

    … It was confirmed that the established calibration model was acceptable for this quantification because of the root-mean-squared error of cross-validation (RMSECV) being 1.95%. … Since this calibration model achieved the root-mean-squared error of prediction (RMSEP) of 1.42% for the double layered tablets, this technique was considered feasible even if the drug substance is localized in the tablets. …

    Chemical and Pharmaceutical Bulletin 60(12), 1487-1493, 2012

    J-STAGE CrossRef

  • 16

    Influence of Aluminum Oxide on Estimation of Chlorpyrifos Dried on Apple Skin using UV Spectral Reflectance

    MAKINO Yoshio , MORI Makito , KAWAGOE Yoshinori , OSHITA Seiichi

    … Reflectance data at 380 nm ranged from 0.051–0.41 for calibration. … Furthermore, the standard error of prediction is 8.40×10－3 mg•cm－2. …

    Environment Control in Biology 50(3), 255-262, 2012

    J-STAGE CrossRef

  • 17

    A 60GHz CMOS Transceiver IC for a Short-Range Wireless System with Amplitude/Phase Imbalance Cancellation Technique

    TAKINAMI Koji , SATO Junji , SHIMA Takahiro , IWAMOTO Mitsuhiro , AKIZUKI Taiji , KOBAYASHI Masashi , KANEMARU Masaki , MORISHITA Yohei , KITAMURA Ryo , TSUKIZAWA Takayuki , MIZUNO Koichi , SAITO Noriaki , TAKAHASHI Kazuaki

    … By using the proposed technique, the receive path of the transceiver achieves less than 0.2dB of amplitude error and less than 3° of phase error at 60GHz bands over a 10GHz bandwidth, which relaxes the design accuracy required for baluns used in the transceiver. … It also employs a simple and fast calibration algorithm to adjust the locking range of the divide-by-3 injection locked divider in the phase locked loop. …

    IEICE Transactions on Electronics E95.C(10), 1598-1609, 2012

    J-STAGE CrossRef

  • 18

    Nuclear Reaction Analysis for Composition Measurement of BN Thin Films

    KOBAYASHI Toshiro , TAKAMIYA Syohei , KANEMATSU Hideyuki , FUKUI Toshiriro

    … On the other hand, the NRA has the advantage that it allows to measure the areal concentrations of nitrogen and boron in BNx films on Si substrates, although calibration is required using standard specimens. … The areal ratio 14N/10B was 7.73 and the error was -3.5 to +3.2%. …

    Journal of Power and Energy Systems 6(2), 129-139, 2012

    J-STAGE CrossRef

  • 19

    L-Ascorbic Acid Prediction in Aqueous Solution Based on FTIR-ATR Terahertz Spectroscopy

    SUHANDY Diding , YULIA Meinilwita , OGAWA Yuichi , KONDO Naoshi

    … Full spectrum partial least squares (FS-PLS) regression was used to develop and validate the calibration model for determination of L-AA. … The result showed that using the pre-processing of Savitzky-Golay first derivative spectra, prediction resulted in the lowest root mean square error of prediction (RMSEP) = 2.791%. … A ratio of standard deviation to prediction error (RPD) value of 4.48 was obtained. …

    Engineering in Agriculture, Environment and Food 5(4), 152-158, 2012

    J-STAGE

  • 20

    Scanning Probe for Coordinate Measurement Using a Translational Parallel Mechanism (Prototyping of the Isotropic Mechanism and Calibration of the Mechanical Parameters)  [in Japanese]

    HARADA Takashi , 董 科 , 金丸 健太

    … Relationships between positioning errors and mechanical parameters of the TPM are revealed by applying the error propagation analysis. … By applying mechanical parameters calibration, the accuracy of the absolute position of the TPM has been improved to 3.4 μm. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78(787), 826-841, 2012

    J-STAGE CrossRef