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51.
Tu-Bao Ho Canh-Hao Nguyen Saori Kawasaki Si-Quang Le Katsuhiko Takabayashi 《New Generation Computing》2007,25(3):247-262
Various data mining methods have been developed last few years for hepatitis study using a large temporal and relational database
given to the research community. In this work we introduce a novel temporal abstraction method to this study by detecting
and exploiting temporal patterns and relations between events in viral hepatitis such as “event A slightly happened before
event B and B simultaneously ended with event C”. We developed algorithms to first detect significant temporal patterns in
temporal sequences and then to identify temporal relations between these temporal patterns. Many findings by data mining methods
applied to transactions/graphs of temporal relations shown to be significant by physician evaluation and matching with published
in Medline. 相似文献
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54.
Development and experimental study of a novel pruning robot 总被引:2,自引:0,他引:2
S. Ueki H. Kawasaki Y. Ishigure K. Koganemaru Y. Mori 《Artificial Life and Robotics》2011,16(1):86-89
This article presents the development of a timberjack-like pruning robot. The climbing principal is an imitation of the climbing
approach of timberjacks in Japan. The robot’s main features include having its center of mass outside the tree, and an innovative
climbing strategy fusing straight and spiral climbs. This novel design brings both lightweight and high climbing speed features
to the pruning robot. We report our progress in developing the robot, focusing on straight climbing, behavior on uneven surfaces,
and pruning. 相似文献
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57.
Keiji Tsukada Mitsuteru Yoshioka Yoshihiko Kawasaki Toshihiko Kiwa 《NDT & E International》2010,43(4):323-328
We have developed a magnetic flux leakage (MFL) system using magnetic resistive (MR) sensors for detecting two dimensional magnetic field components, and an induction coil that generates low magnetic field strengths and extremely low frequencies. The signal at each scanned measurement point (i) was divided by the signal strength Mmes,i and phase αi by a lock-in amplifier. Using the strength Mmes,i and phase αi, we calculated the imaginary part of the signal using the common phase β. By optimization of the common phase β to the imaginary part, the analyzed scanning data curve was shown to be effective in estimating the size (depth and diameter) of back-side pits on a ferrous plate. Comparing the two dimensional magnetic field components of leakage, the imaginary part of the y-component parallel to the induced magnetic field was found to be suitable for detecting the back-side pits. 相似文献
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59.
Kuge S. Kato T. Furutani K. Kikuda S. Mitsui K. Hamamoto T. Setogawa J. Hamade K. Komiya Y. Kawasaki S. Kono T. Amano T. Kubo T. Haraguchi M. Nakaoka Y. Akiyama M. Konishi Y. Ozaki H. Yoshihara T. 《Solid-State Circuits, IEEE Journal of》2000,35(11):1680-1689
A 200-MHz double-data-rate synchronous-DRAM (DDR-SDRAM) was developed. The chip contains a delay-locked loop (DLL) which performs over a wide range of operating conditions. Post-mold-tuning allows precise replica programming. A 200-MHz intra-chip data bus is suitable for DDR operation 相似文献
60.
Wada M. Okubora A. Takano C. Kawasaki H. Hida Y. Kasahara J. 《Electron Devices, IEEE Transactions on》1989,36(7):1387-1388
High-speed DCFL (direct-coupled FET logic) circuits implemented with advanced GaAs enhancement-mode J-FETs are discussed. A divide-by-four static frequency divider operates at up to 6 GHz with a power consumption of 20 mW/flip-flop. A high channel concentration of more than 1×1018 cm-3 together with a very shallow junction depth of less than 30 nm for the p+-gate results in a transconductance as high as 340 mS/mm at a gate length of 0.8 μm. Open-tube diffusion of Zn using diethylzinc and arsine makes it possible to control a very shallow p+-layer less than 10 nm thick. The propagation delay time, as measured with a ring oscillator, was 22 ps/gate with a power consumption of 0.42 mW/gate 相似文献