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SNOM Observations of Surface Plasmon Polaritons on Metal Heterostructures

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Chinese Physics Letters 2007年第10期24卷 2827-2829页

作者： KITAZAWA Tazuko MIYANISHI Shintaro MURAKAMI Yoshiteru KOJIMA Kunio TAKAHASHI Akira advanced technology research laboratories SHARP CORPORATION 2613-1 Ichinomoto-cho Tenri Nara Japan

We observe surface plasmon polariton （SPP） refraction on a metal heterostructured sample with a scattered-type scanning near-field optical microscope （SNOM）. The sample consists of AI and Au in-plane whose boundary is smooth enough with proper etching time. SPPs excited on the AI film travel to the boundary and a portion of SPPs propagates into the Au film. In addition, interference fringes appear in the SNOM image bent at the boundary. The result is analysed with effective index method and the refracted angle is explained by Shell＇s law.

关键词： LIGHT

An Approximate High Gain Observer for Speed-sensorless Estimation of Induction Motors

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 53-63页

作者： Yebin Wang Lei Zhou Scott A.Bortoff Akira Satake Shinichi Furutani IEEE Mitsubishi Electric research laboratories the Department of Mechanical Engineering Massachusetts Institute of Technology the advanced technology R&D Center Mitsubishi Electric Corporation

Rotor speed estimation for induction motors is a key problem in speed-sensorless motor drives. This paper performs nonlinear high gain observer design based on the full-order model of the induction motor. Such an effort appears nontrivial due to the fact that the full-model at best admits locally a non-triangular observable form(NTOF), and its analytical representation in the NTOF can not be obtained. This paper proposes an approximate high gain estimation algorithm, which enjoys a constructive design, ease of tuning, and improved speed estimation and tracking performance. Experiments demonstrate the effectiveness of the proposed algorithm.

关键词： Induction motor industrial applications nonlinear state estimation speed-sensorless motor drive

Iron-handling solute carrier SLC22A17 as a blood-brain barrier target after stroke

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Neural Regeneration research 2025年第11期20卷 3207-3208页

作者： Xueqi Ren Wenlu Li Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Neuroprotection research laboratories Departments of Radiology and NeurologyMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA

The pathophysiology of ischemic stroke is complex and multifactorial,involving various forms of cell death such as apoptosis,autophagy,and necrosis.A recent study suggests that oxidative and inflammatory stress can induce ferroptosis,a specialized form of cell death characterized by the accumulation of lipid peroxides dependent on intracellular iron overload(Li and Jia,2023).

关键词： death specialized barrier

Communication Between Speech Production and Perception Within the Brain--Observation and Simulation

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Journal of Computer Science & technology 2006年第1期21卷 95-105页

作者：党建武赤木正人本多清志 Japan advanced Institute of Science and technology Ishikawa Japan ATR Human Information Science laboratories Kyoto Japan

Realization of an intelligent human-machine interface requires us to investigate human mechanisms and learn from them. This study focuses on communication between speech production and perception within human brain and realizing it in an artificial system. A physiological research study based on electromyographic signals （Honda, 1996） suggested that speech communication in human brain might be based on a topological mapping between speech production and perception, according to an analogous topology between motor and sensory representations. Following this hypothesis, this study first investigated the topologies of the vowel system across the motor, kinematic, and acoustic spaces by means of a model simulation, and then examined the linkage between vowel production and perception in terms of a transformed auditory feedback （TAF） experiment. The model simulation indicated that there exists an invariant mapping from muscle activations （motor space） to articulations （kinematic space） via a coordinate consisting of force-dependent equilibrium positions, and the mapping from the motor space to kinematic space is unique. The motor-kinematic-acoustic deduction in the model simulation showed that the topologies were compatible from one space to another. In the TAF experiment, vowel production exhibited a compensatory response for a perturbation in the feedback sound. This implied that vowel production is controlled in reference to perception monitoring.

关键词： speech communication human mechanism speech production speech perception

Accurate laser skin perforation technique aimed at promoting bleeding and reducing pain

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Journal of Innovative Optical Health Sciences 2015年第6期8卷 9-16页

作者： Han-Chao Chang Yu-Hsuan Lin Kuo-Cheng Huang Instrument technology research Center National Applied research laboratories Hsinchu 30076Taiwan

Laser skin perforation is an effective and promising technique for use in blood *** this study,the relation between the perforation profile of skin and laser irradiation at various energies is *** laser energy does not uniformly expand the size and depth of a hole because the shallow depth of field(DOF)of the focused light primarily concentrates energy on the skin *** practice,the hole gradually transforms from a semielliptical shape to an upsidedown avocado shape as the laser energy *** phenomenon can increase the amount of bleeding and reduce *** findings support the feasibility of developing an accurate laser skin perforation method.

关键词： Laser skin perforation blood collection Er YAG laser diabetic

Improving the corrosion properties of magnesium AZ31 alloy GTA weld metal using microarc oxidation process

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International Journal of Minerals,Metallurgy and Materials 2017年第5期24卷 566-573页

作者： M.Siva Prasad M.Ashfaq N.Kishore Babu A.Sreekanth K.Sivaprasad V.Muthupandi Department of advanced Materials Engineering Dong-Eui University advanced Materials Processing Laboratory Department of Metallurgical and Materials EngineeringNational Institute of Technology FARCAMT Advanced Manufacturing InstituteKing Saud University Empa Swiss Federal Laboratories for Materials Science and TechnologyLaboratory for Advanced Materials Processing Department of Chemistry National Institute of Technology

In this work, the morphology, phase composition, and corrosion properties of microarc oxidized (MAO) gas tungsten arc (GTA) weldments of AZ31 alloy were investigated. Autogenous gas tungsten arc welds were made as full penetration bead-on-plate welding under the alternating-current mode. A uniform oxide layer was developed on the surface of the specimens with MAO treatment in silicate-based alkaline electrolytes for different oxidation times. The corrosion behavior of the samples was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. The oxide film improved the corrosion resistance substantially compared to the uncoated specimens. The sample coated for 10 min exhibited better corrosion properties. The corrosion resistance of the coatings was concluded to strongly depend on the morphology, whereas the phase composition and thickness were concluded to only slightly affect the corrosion resistance.

关键词： magnesium alloys weldments microarc oxidation corrosion resistance

Electrochemical decolorization of dye wastewater by surface-activated boron-doped nanocrystalline diamond electrode

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Journal of Environmental Sciences 2016年第7期28卷 100-107页

作者： Chienhung Chen Ervin Nurhayati Yaju Juang Chihpin Huang Institute of Environmental Engineering National Chiao Tung University Material and Chemical research laboratories Industrial Technology Research Institute

Complex organics contained in dye wastewater are difficult to degrade and often require electrochemical advanced oxidation processes（EAOPs） to treat it. Surface activation of the electrode used in such treatment is an important factor determining the success of the *** performance of boron-doped nanocrystalline diamond（BD-NCD） film electrode for decolorization of Acid Yellow（AY-36） azo dye with respect to the surface activation by electrochemical polarization was studied. Anodic polarization found to be more suitable as electrode pretreatment compared to cathodic one. After anodic polarization, the originally H-terminated surface of BD-NCD was changed into O-terminated, making it more *** to the oxidation of surface functional groups and some portion of sp2 carbon in the BD-NCD film during anodic polarization, the electrode was successfully being activated showing lower background current, wider potential window and considerably less surface activity compared to the non-polarized one. Consequently, electrooxidation（EO） capability of the anodically-polarized BD-NCD to degrade AY-36 dye was significantly enhanced, capable of nearly total decolorization and chemical oxygen demand（COD） removal even after several times of re-using. The BD-NCD film electrode favored acidic condition for the dye degradation; and the presence of chloride ion in the solution was found to be more advantageous than sulfate active species.

关键词： Boron-doped NCD Surface activation Electrochemical polarization Electrooxidation Azo dye Acid Yellow(AY-36)

Effect of Nitrogen Doping on the Electrical Properties of 3C-SiC Thin Films for High-Temperature Sensors Applications

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Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 168-174页

作者： H.K.E.Latha A.Udayakumar V.Siddeswara Prasad Department of Instrumentation technology Siddaganga Institute of Technology Materials Science Division Council of Scientific and Industrial Research-National Aerospace Laboratories

3C-SiC is a promising structural material for piezoresistive sensors used in high-temperature applications. For sensor development, the preparation of sensor materials and study of its electrical properties, such as resistivity, barrier height of grain boundaries, and temperature coefficient of resistivity, are important in addition to structural properties and these have to be optimized. In the present work, 3C-SiC thin film with in situ doping of nitrogen is prepared through low- pressure chemical vapor deposition by using methyl trichloro silane, ammonia, and hydrogen as precursors. Electrical properties of deposited 3C-SiC thin films with varying nitrogen doping concentration through four probe technique are studied. Atomic force microscopy investigations are carried out to study the grain size on and average root-mean-squared roughness 3C-SiC thin films. A decrease in the degree of crystallinity is observed in nitrogen-doped 3C-SiC thin films. The sheet resistivity of nitrogen-doped 3C-SiC thin film is found to decrease with increase in temperature in the range from 303 to 823 K. The sheet resistivity, average temperature coefficient of resistance, and barrier height of the grain boundaries of film doped with 17 at.% of nitrogen are 0.14 cm, -1.0 x 10-n/K, and 0.01 eV, respectively. Comparing all the nitrogen-doped 3C-SiC thin films, the film doped with 17 at.% of nitrogen exhibits an improved structural and electrical properties and it can be used as sensing material for high-temperature applications.

关键词： Low-pressure chemical vapor deposition (LPCVD) 3C-SiC thin film Resistivity Barrier height of grain boundaries: Temperature coefficient of resistivitv (TCR)

Longs short-term based semi-supervised memory encoder-decoder for early prediction of failures in self-lubricating bearings

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Friction 2023年第1期11卷 109-124页

作者： Vigneashwara PANDIYAN Mehdi AKEDDAR Josef PROST Georg VORLAUFER Markus VARGA Kilian WASMER Laboratory for advanced Materials Processing(LAMP) Swiss Federal Laboratories for Materials Science and Technology(Empa)Thun CH-3602Switzerland AC2T research GmbH Wiener Neustadt 2700Austria

The existing knowledge regarding the interfacial forces,lubrication,and wear of bearings in real-world operation has significantly improved their designs over time,allowing for prolonged service *** a result,self-lubricating bearings have become a viable alternative to traditional bearing designs in industrial ***,wear mechanisms are still inevitable and occur progressively in self-lubricating bearings,as characterized by the loss of the lubrication film and ***,monitoring the stages of the wear states in these components will help to impart the necessary countermeasures to reduce the machine maintenance *** article proposes a methodology for using a long short-term memory(LSTM)-based encoder-decoder architecture on interfacial force signatures to detect abnormal regimes,aiming to provide early predictions of failure in self-lubricating sliding contacts even before they *** sliding experiments were performed using a self-lubricating bronze bushing and steel shaft journal in a custom-built transversally oscillating tribometer *** force signatures corresponding to each cycle of the reciprocating sliding motion in the normal regime were used as inputs to train the encoder-decoder architecture,so as to reconstruct any new signal of the normal regime with the minimum *** this semi-supervised training exercise,the force signatures corresponding to the abnormal regime could be differentiated from the normal regime,as their reconstruction errors would be very *** the validation procedure for the proposed LSTM-based encoder-decoder model,the model predicted the force signals corresponding to the normal and abnormal regimes with an accuracy of 97%.In addition,a visualization of the reconstruction error across the entire force signature showed noticeable patterns in the reconstruction error when temporally decoded before the actual critical failure point,making it possible to be used for early predic

关键词： predictive maintenance in-situ sensing long short-term memory(LSTM) encoder-decoder wear monitoring tribology