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IEEE Instrumentation and Measurement technology Conference

作者： I. Hiroaki N. Toyonori T. Eiji Agricultural Technology Institute of Nagano Farmers Federation Suzaka Japan Department of Textile System Engineering Faculty of Textile Science and Technology Shinshu University Ueda Japan

ISBN: (纸本)0780366468

This paper describes nondestructive pesticide measurement of agricultural products based on the diffuse reflectance infrared spectroscopy (FT-IR-DR). Both FT-IR-DR spectra and the concentration of the pesticide residues were measured for real lettuce samples. Then, calibration models to estimate the residual concentration of the pesticides were derived by partial least square regression of the spectra. Cross validations of the calibration models were also carried out. It has been revealed that by using this method, it takes two minutes to measure multi-elements of pesticide residues in a sample lettuce head. A sensor system for food safety inspection could be expected based on this method.

关键词： Reflectivity Infrared spectra Spectroscopy Mirrors Agricultural products Textile technology Calibration Least squares methods Food technology Agricultural engineering

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ZERO POWER NONLINEAR CONTROL OF RIGID ROTOR AND FLEXIBLE ROTOR-MAGNETIC BEARING system BY BACKSTEPPING METHOD

ZERO POWER NONLINEAR CONTROL OF RIGID ROTOR AND FLEXIBLE ROT...

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2001亚太振动会议

作者： Zi-heLIU KenzoNONAMI Artificial System Science Course Graduate School of Science and Technology Chiba University JAPAN Department of Electronics and Mechanical Engineering Faculty of Eng. Chiba University JAPAN

Generally,the control strategies for a magnetic bearingoften focus on the linear control techniques by throughthe bias current to a pair of the electromagnets anddesign a control system based on the linear control *** this paper,we propose a new algorithm to realize anonlinear zero power control of rigid rotor-magneticbearing system using only electromagnets bybackstepping method which belongs to a nonlinearcontrol *** we designed the control system usingbackstepping method for the reduced order ***,we also propose a new algorithm which willbe able to find out their control currents with a globalstability ***,those methods wereapplied to the rigid rotor and the flexible rotor-magneticbearing system to examine the stability by simulationsand experiments,the results show the validity of theproposed method.

关键词： ZERO POWER NONLINEAR CONTROL OF RIGID ROTOR AND FLEXIBLE ROTOR-MAGNETIC BEARING system BY BACKSTEPPING METHOD POWER

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ADAPTIVE UNBALANCE VIBRATION CONTROL OF MAGNETIC BEARING systemS WITH ROTATIONAL SYNCHRONIZING AND ASYNCHRONIZING HARMONIC DISTURBANCE

ADAPTIVE UNBALANCE VIBRATION CONTROL OF MAGNETIC BEARING SYS...

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2001亚太振动会议

作者： Zi-heLIU KenzoNONAMI Artificial System Science Course Graduate School of Science and Technology Chiba University.Japan. Department of Electronics and Mechanical Engineering Faculty of Eng. Chiba University Japan

In this study,we present a new adaptive multiplefrequency tracking and new modification law afterexamining relation between the error of frequency andoutput level in detail. We also develop a multiplefrequency estimation algorithm, which is insensitive toobservation noise and prove the asymptotic stability foradaptive nonlinear algorithm and adaptive frequencytracking method theoretically. The effectiveness of thismethod and the theoretical proof are verified bysimulation. The experimental results show that theproposed algorithm is effective for achieving unbalancevibration suppression.

关键词： Magnetic Bearing system, Disturbance Attenuation, Difference Equation Method, Adaptive Control, Nonlinear Adaptive Algorithm, Frequency Estimation, Adaptive Frequency Tracking, Asymptotic Stability, and Rotational Synchronizing Disturbance.

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High frequency current fluctuations and cross-shelf flows around the pycnocline near the shelf break in the East China Sea

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Journal of Oceanography 2001年第2期57卷 235-249页

作者： Han, I.-S. Kamio, K. Matsuno, T. Manda, A. Isobe, A. Graduate School of Marine Science and Engineering Nagasaki University Nagasaki 852-8521 1-14 Bunkyo Japan Tokyo Kyuei Co. Ltd. Kawaguchi 333-0866 Japan Research Institute for Applied Mechanics Kyushu University Kasuga Fukuoka 816-8580 Japan Faculty of Environmental and Symbiotic Sciences Prefectural University of Kumamoto Kumamoto 862-8502 Japan Department of Earth System Science and Technology Interdisciplinary Graduate School of Engineering Sciences Kyushu University Kasuga Fukuoka 816-8580 Japan

Relation between internal waves with short time scale and density distribution near the shelf break in the East China Sea is studied utilizing moored current meters, thermometers and conductivity-temperature-depth (CTD) casts. A well developed pycnocline was frequently observed around 150-200 m depth near the shelf break accompanied with the development of internal waves with short time scale. During the cruise in May 1998, the intensified internal wave motion with short time scale and the distinct offshore flow were observed just below the lower pycnocline, which shoaled and extended above the shelf area. It is suggested that vertical mixing generated by amplified internal waves would produce cross-shelf ageostophic density current around the pycnocline. During the cruise in May 1999, on the other hand, the lower pycnocline was located offshore below the shelf break, and the internal wave motion was amplified just above the lower pycnocline. In this case, the offshore flow should be generated above the lower pycnocline, but vertical profiles of current velocity were not obtained because acoustic Doppler current profiler (ADCP) data were not available around the lower pycnocline.

关键词： East china sea Internal wave Offshoreflow Pycnocline Shelf break

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Several results on de Morgan algebra and Kleene algebra of fuzzy logic

Several results on de Morgan algebra and Kleene algebra of f...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Jianming Deng M. Umano T. Oda Y. Uno Department of Computer Science and Engineering South-East University Nanjing China Department of Mathematics and Information Sciences College of Integrated Arts and Sciences Osaka Prefecture University Japan Department of Marketing and Information System Faculty of Management and Information Science Aichi Institute of Technology Japan

We present several results on de Morgan algebras and Kleene algebras of fuzzy logic. The main results include (1) a necessary and sufficient condition for a de Morgan algebra to be a Kleene algebra, (2) equivalence of some expressions, (3) some properties about de Morgan algebras with sup W/sup +/ and inf W/sup -/, (4) some properties of the de Morgan algebras which satisfy certain special conditions, (5) a method to obtain all fixed points of a de Morgan algebra and (6) extensions of some theorems on complete de Morgan algebras that have fixed points to the general case.

关键词： Algebra Fuzzy logic Sufficient conditions Lattices Mathematics Educational institutions Art Computer science Management information systems Information management

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Feedback control for electromagnetic vibration feeder (application of two-degrees-of-freedom proportional plus integral plus derivative controller with nonlinear element)

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JSME International Journal, Series C: Mechanical systems, Machine Elements and Manufacturing 2001年第1期44卷 44-52页

作者： Doi, Tomoharu Yoshida, Koji Tamai, Yutaka Kono, Katsuaki Naito, Kazufumi Ono, Toshiro Department of Systems and Control Engineering Faculty of Engineering Osaka Prefectural College of Technology 26-12 Saiwai-cho Neyagawa Osaka 572-8572 Japan Department of System Engineering Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan Research and Development Department Ishida Co. Ltd. 959-1 Shimomagari Ritto-cho Kurita-gun Shiga 520-3026 Japan Department of Mechanical Systems Engineering College of Engineering Osaka Prefecture University 1 1 Gakuen-cho Sakai Osaka 599-8531 Japan

An electromagnetic-type vibratory feeder of is a typical transportation device used in automatic weighers. As existing feeders are driven by feedforward control, the so-called "firing angle control", the driver cannot negate sudden disturbances. In this study, we consider applying a feedback control for such a feeder system. First, we give the two details of modelings for the vibration part and for the electromagnetic force part. Next, a feedback control system is constructed for the electromagnetic vibration feeder for which we propose a two-degrees-of-freedom proportional plus integral plus derivative (PID) controller with nonlinear elements. Next, we apply the feedback control to the feeder with a standard trough. Finally, we consider a method compatible with many varieties of troughs by adjusting a nonlinear element. On the basis of the results of some experiments, we confirm that the two-degrees-of-freedom PID control is more effective than the conventional firing angle control.

关键词： Mechanics

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High speed ablation etching and microstructure fabrication of hexagonal GaN using femtosecond laser

High speed ablation etching and microstructure fabrication o...

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Conference on Lasers and Electro-Optics (CLEO)

作者： K. Ozono M. Obara A. Usui H. Sunakawa Department of Electronics and Electrical Engineering Faculty of Science and Technology Keio University Yokohama Japan Photonic and Wireless Devices Research Laboratories System Devices and Fundamental Research NEC Corporation Limited Tsukuba Ibaraki Japan

Summary form only given. We report on the demonstration of nonthermal high-speed ablation etching and microstructure fabrication of GaN using diffractive optics by high-intensity femtosecond laser at 800 nm and at 1 kpps. The GaN film used here is about 100 /spl mu/m thick film grown on the sapphire substrate. The laser ablation of GaN film is done in air at room temperature using a 150 fs Ti:sapphire laser.

关键词： Etching Microstructure Gallium nitride Optical films Laser ablation Optical device fabrication Ultrafast optics Optical diffraction High speed optical techniques Thick films

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Organic wastes for improving soil physical properties and enhancing plant growth in container substrates

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Journal of Crop Production 2001年第1期3卷 97-112页

作者： Nkongolo, Nsalambi V. Caron, Jean Gauthier, Fabienne Yamada, Mitate Vegetable Cultivation Technology System Laboratory National Agriculture Research Center Tsukuba Ibaraki 305-8666 3-1-1 Kannondai Japan Soil Science and Agrifood Engineering Department Faculty of Agricultural and Food Sciences Pavillon Paul-Comtois Laval University Ste-Foy QC G1K 7P4 Canada The Horticultural Research Center Faculty of Agricultural and Food Sciences Pavillon Paul-Comtois Laval University Ste-Foy QC G1K 7P4 Canada

Increasing rates (5, 10, 25 and 40% v/v) of 6 sources of organic wastes were substituted for peat to assess changes in the physical properties of peat-perlite substrates and investigate the relationship between plant response and these properties. Wastes were either fresh or composted bio-filter sludge (FBF and CBF), sewage sludge (FSS and CSS), and de-inked paper sludge (FDP and CDP). Geranium plants (Pelagornium× hortorum ‘Orbit Hot Pink’) were grown in the substrates. Growing substrates' saturated hydraulic conductivity (K_s), air-filled porosity (f _a), pore tortuosity (t), and relative gas diffusivity (D_s/D_o) all increased linearly (p = 0.0001) as the rate of organic wastes increased. Geranium plant height (PHT), shoot dry mass (SDM) and root dry mass (RDM) were either linearly or quadratically decreased (p = 0.0001) as the amount of waste increased in the substrates. During both growing seasons, Geranium SDM and RDM were either linearly or quadratically correlated with D_s/D_o and t. Organic waste types and their rate of application strongly affected the aeration status of the substrates. D_s/D_o and t better expressed the relationship between plant growth and the physical conditions of the root zone. © 2000 Taylor & Francis Group, LLC.

关键词： Aeration criteria Gas diffusivity Geranium Organic waste Peat substrate Plant response Pore tortuosity

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Dendritic calcium accumulation regulates wind sensitivity via short-term depression at cercal sensory-to-giant interneuron synapses in the cricket

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Developmental Neurobiology 2001年第4期46卷

作者： Hiroto Ogawa Yoshichika Baba Kotaro Oka Kawachi Millibioflight Project ERATO JST 4-7-6 Komaba Meguro Tokyo 153-0014 Japan Section of Information and Processing Laboratory of Neuro-cybernetics Research Institute for Electronic Science Hokkaido University Kita 12-jyo Nishi 6 Kita-ku Sapporo 060-0812 Japan Department of System Design Engineering Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

An in vivo Ca 2+ imaging technique was applied to examine the cellular mechanisms for attenuation of wind sensitivity in the identified primary sensory interneurons in the cricket cercal system. Simultaneous measurement of the cytosolic Ca 2+ concentration ([Ca 2+ ] i ) and membrane potential of a wind-sensitive giant interneuron (GI) revealed that successive air puffs caused the Ca 2+ accumulation in dendrites and diminished the wind-evoked bursting response in the GI. After tetanic stimulation of the presynaptic cercal sensory nerves induced a larger Ca 2+ accumulation in the GI, the wind-evoked bursting response was reversibly decreased in its spike number. When hyperpolarizing current injection suppressed the [Ca 2+ ] i elevation during tetanic stimulation, the wind-evoked EPSPs were not changed. Moreover, after suprathreshold tetanic stimulation to one side of the cercal nerve resulted in Ca 2+ accumulation in the GI's dendrites, the slope of EPSP evoked by presynaptic stimulation of the other side of the cercal nerve was also attenuated for a few minutes after the [Ca 2+ ] i had returned to the prestimulation level. This short-term depression at synapses between the cercal sensory neurons and the GI (cercal-to-giant synapses) was also induced by a depolarizing current injection, which increased the [Ca 2+ ] i , and buffering of the Ca 2+ rise with a high concentration of a Ca 2+ chelator blocked the induction of short-term depression. These results indicate that the postsynaptic Ca 2+ accumulation causes short-term synaptic depression at the cercal-to-giant synapses. The dendritic excitability of the GI may contribute to postsynaptic regulation of the wind-sensitivity via Ca 2+ -dependent depression. © 2001 John Wiley & Sons, Inc. J Neurobiol 46: 301–313, 2001

关键词： active dendrite calcium cricket giant interneuron short-term synaptic depression

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A real-time communication mechanism for RTLinux

A real-time communication mechanism for RTLinux

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作者： Sato, H. Yakoh, T. Department of System Design Engineering Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama223-8522 Japan

This article proposes a new real-time communication mechanism called RT-Messenger. This mechanism is designed to handle communication messages with interrupt-level priority. Although RT-Messenger is independent of communication devices, we implemented this mechanism to support an Ethernet as an additional function of RTLinux, a real-time extended Linux. Some performance evaluations show that this mechanism is fast enough to communicate and to synchronize between two real-time programs which run on different computers. Also, an experimental result shows that two robot systems were successfully controlled bilaterally. © 2000 IEEE.

关键词： Computer operating systems

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