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排序方式: 共有693条查询结果,搜索用时 15 毫秒
1.
2.
Takeshi Shiofuku Norihiro Abe Yoshihiro Tabuchi Hirokazu Taki Shoujie He 《Artificial Life and Robotics》2008,13(1):290-293
This paper presents an approach of measuring in real-time the vector of finger that is pointing to an object. DSP is used
in the operation processing unit in order to do the real-time processing. The steps include the extraction of flesh-colored
regions from an image, the labeling of the flesh-colored regions, and the detection of two characteristic positions on the
finger so that the direction that the finger is pointing at will be calculated. The entire process takes about 29 msec, which
makes it possible to have the frame rate of 34 fps. With this frame rate, this measurement approach is considered real-time
and promising to be merged into other application systems.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
3.
A serious problem in motion control is the occurrence of torque ripple. Since a direct drive (DD) motor with a magnet rotor uses a rare-earth magnet, the torque ripple is more serious than that of conventional servomotors. This paper presents an auto-compensation of torque ripple using a software-implemented torque observer. The frequency and amplitude of torque ripple can be obtained in the controller by using the estimated torque from an observer, and the autonomous generation of a compensating current component for a torque ripple is possible. The proposed algorithm has been verified by experiments. 相似文献
4.
5.
The glycosphingolipid compositions of rat mammary tumour cell lines with different metastatic potentials for the lung [a parental tumour cell line (MTC) and its subclones MTLn2 (a non metastatic subclone) and MTLn3 (a subclone with high metastatic potential to the lung)] were studied using a newly developed TLC blotting/secondary ion mass spectrometry system and crude glycosphingolipids obtained from 0.5-1 x 10(7) cells of each cell line. GM3 and GM2 were the major components of the MTC cell line, but they were very minor components in the MTLn2 and MTLn3 cell lines, GDla being the major ganglioside HexNAc-fucosyl-GMla was found in the MTLn2 cells by the TLC blotting/SIMS method, and the terminal sugar linkage was shown to be a blood group A-type structure by immunostaining. These findings suggest that the ganglioside is a novel type of blood group A-active ganglioside, GalNAc alpha 1-3(fuc alpha 1 -2)GMla. No blood group A-active lipid was present in MTLn3 cells, whereas Hex-GMla and neutral glycosphingolipids with more than 5 sugar residues were. 相似文献
6.
Hirokazu Ikeda Chikara Fukunaga Yutaka Saitoh Masahiro Inoue Junko Yamanaka 《Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment》1996,380(3):618-622
The radiation tolerance for prototype front-end chips designed for a silicon micro-strip detector was examined with a 60Co irradiation source to establish an allowable range of the radiation dose. The irradiated front-end chips were SMA2SH-64A, a 64-channel preamplifier array; SMA2SH-1, a single-channel preamplifier circuit with a comparator; and Control-C, a digital-control chip for the preamplifiers. 相似文献
7.
J Taki K Nakajima I Matsunari H Bunko S Takata M Kawasuji N Tonami 《Canadian Metallurgical Quarterly》1997,38(10):1503-1510
We investigated the effect of bioflavonoid quercetin on tyrosine phosphorylation and phospholipase D (PLD, EC 3.1.4.4) activation in rabbit peritoneal neutrophils stimulated by N-formylmethionyl-leucyl-phenylalanine (fMLP). The quercetin dose-dependently inhibited degranulation and superoxide production in fMLP-stimulated neutrophils. A strong inhibitory effect of quercetin on the tyrosine phosphorylation of several proteins (40, 42, 43, 45, 46 and 75 kDa) was observed when the neutrophils were pretreated with different concentrations of quercetin. Furthermore, quercetin inhibited mitogen activated protein kinase (MAP kinase) and PLD activation induced by fMLP in a dose-dependent manner. The reduction in PLD activity was 30% at 0.1 microM and 70% at 100 microM of quercetin. These results suggest that impairment of neutrophil functions by quercetin may be due, at least in part, to inhibition of tyrosine phosphorylation and PLD activation. 相似文献
8.
In this paper, we propose a multi-agent learning system for the control of an intelligent robot, based on a model of the human
consciousnesses, including the ego. We pay attention to the intelligent learning processes of human beings. We try to give
a robot a high learning ability by modeling the roles of the human consciousnesses, including the ego. In most ordinary methods,
the instructions for learning are given from outside the system only. In the proposed method, the instructions are given not
only from outside, but also from inside (from other agents in the system). Therefore, the robot can learn efficiently because
it has more instructions than usual. The learning is also more flexible, since an agent learns by instructions from other
agents while the learning agent and one of the instructing agents exchange roles according to changes in the environment.
We experimentally verified that the proposed method is efficient by using an actual robot. 相似文献
9.
Yasushi Murakami Taki Matsumoto Kiyochika Yahikozawa Yoshio Takasu 《Catalysis Today》1995,23(4):383-389
The sol-gel process for the hydrolysis and polycondensation of tin tetra-n-butoxide in butanol was followed by viscosity measurements. The precipitation of tin-containing ultrafine particles was observed without any variation in the solution viscosity in the absence of diethylene glycols, while the viscosity increase was made without any precipitation by the addition of diethylene glycol. The induction period and the rate of the viscosity increase after the induction period was independent of the diethylene glycol content but depended upon the water content. The Monte Carlo simulation data were consistent with data for the viscosity experiment. The simulation was based on a kinetic model of the slow hydrolysis of tin tetra-n-butoxide, the reverse reaction of hydrolysis, and the polycondensation of the hydroxy derivatives. 相似文献
10.
Toshihide Miyagi Norihiro Abe Yoshimasa Kinoshita Tatsushi Tokuyasu Hirokazu Taki Shoujie He 《Artificial Life and Robotics》2009,14(2):237-241
In this article, a system is proposed for a simulated operation which would help a trainee surgeon to perform a medical operation
to ensure that a cerebral aneurysm does not burst. The physician will have acquired empirical medical technologies from operations
in traditional clinical teaching. However, there is a problem with safety and the burden to the patient. Therefore, recently
a new training approach for a simulated medical operation using virtual reality has been explored. With the aim of developing
a simulated system for a medical operation for a cerebral aneurysm, we considered the necessary functions such as detecting
the brain aneurysm that is the target of the operation, and searching for a suitable blood vessel to make a plan for the operation. 相似文献