The influence of dimension parameters on the performance of Body-surface Laplacian electrodes is studied in this paper. Some rules about the parameter optimization design are presented. The investigation suggests that...
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Epitaxially deposited thin films of InAs on semi-insulating GaAs substrates are commonly used for high-speed electronic devices. Large (7%) lattice mismatch between InAs and GaAs leads to Stranski-Krastanov growth mod...
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In order to shorten the experimental procedure of ceramic materials design effectively, a fracture toughness predicting system of advanced ceramic composites based on BP neural network was developed, which can precise...
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In order to shorten the experimental procedure of ceramic materials design effectively, a fracture toughness predicting system of advanced ceramic composites based on BP neural network was developed, which can precisely predict the relationship between material composition and the fracture toughness through self-training with the present data, and can perfectly aid the ceramic materials design. This system has friendly interfaces, extensive application, good operating feasibility and reliability examined with the present Al2O3/SiC/(W, Ti)C ceramics.
In order to metallize ceramics surface, the Ni-Ti compound plating was used. The ceramic to metal was brazed in glow discharge furnace without flux in a comparatively low vacuum degree. It was shown by experiments tha...
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In order to metallize ceramics surface, the Ni-Ti compound plating was used. The ceramic to metal was brazed in glow discharge furnace without flux in a comparatively low vacuum degree. It was shown by experiments that Nickel, chosen as the base metal, could effectively improve residual stresses in brazing joints;the joint shear strength could reach up to more than 100 MPa;a little active element Ti was found to distribute in the interfaces, which enhanced the interface reactions between ceramic and the metallizing layer.
This paper describes an online 3D reconstruction system from stereo image sequences to obtain a dense local world model for robot navigation. Proposed method consists of three components: 1) stereo dept. map calculati...
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ISBN:
(纸本)0780389123
This paper describes an online 3D reconstruction system from stereo image sequences to obtain a dense local world model for robot navigation. Proposed method consists of three components: 1) stereo dept. map calculation, 2) correspondence calculation in time sequential images by tracking raw image features, 3) 6DOF camera motion estimation by RANSAC and integrate dept. map into 3D reconstructed model. We examined and evaluated our method in motion capture environment for comparison. Finally experimental results by humanoid robot H7 is denoted.
In this study, a new micro electroporation cell chip was fabricated by MEMS technology and tested by using cervical cancer (HeLa) cells. Large statistical data of the critical voltage and duration time were determined...
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Ball spinning has been used as first aid in forming thin-walled tubes with small diameters since it was invented decades of years ago. Its parameters, however, still depend on empirical data and laboratory experiments...
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Ball spinning has been used as first aid in forming thin-walled tubes with small diameters since it was invented decades of years ago. Its parameters, however, still depend on empirical data and laboratory experiments. One of its parameters, the ball diameter, though related to the other parameters, has greater influence on the qualities of the tube formed than the other parameters. Thus, in this paper, the primary task is to define the ball diameter. Based on the minimal reduction rate and the result of the influencing graph among parameters and peeling, the article gives rules to select the ball diameter in Ball spinning. These rules have been proven very practicable in the literature.
Cytec Engineered materials (CEM) CYCOM® 977-3, a high temperature damage tolerant multifunctional epoxy resin system was modified with three types of nanoparticles: chemically modified montmorillonite (MMT) org...
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Cytec Engineered materials (CEM) CYCOM® 977-3, a high temperature damage tolerant multifunctional epoxy resin system was modified with three types of nanoparticles: chemically modified montmorillonite (MMT) organoclays, surface treated nanosilica, and surface modified carbon nanofibers (CNF) to create new types of epoxy nanocomposites. Wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM) were used to determine the degree of dispersion. Dynamic mechanical thermal analysis (DMTA) was used to determine the Tg and complex modulus of the polymer nanocomposites. The TEM analyses indicated that the MMT clay, nanosilica, and CNF dispersed very well in the epoxy resin system. Evidence is presented that a nanophase is formed when nanoparticles such as surface treated clay, surface treated nanosilica, or carbon nanofibers are introduced into the epoxy resin. Higher Tg and complex modulus values from DMTA for the nanomodified materials are presented as evidence for nanophase presence in the epoxy resin system as compared to lower Tg and complex modulus for the epoxy resin control. The DMTA data of the neat epoxy nanosilica nanocomposite (2% Aerosil® R202) show the highest Tg (258°C) and the highest complex modulus (964 MPa). Five epoxy nanocomposites were selected to produce prepregs using AS4-6K fabric, followed by fabrication into composite panels. The short beam shear values of all epoxy nanocomposites were slightly lower than the baseline with 3% Aerosil® R202 and 2% PR-19-PS-Ox CNF higher than the baseline. The flexural strength of all the epoxy nanocomposites were slightly lower than the baseline with the 2% Cloisite® 10A and 3% Aerosil® R202 materials higher than the baseline. Flatwise tension strength values of all the epoxy nanocomposites were slightly lower than the baseline with 2% PR-19-PS-Ox and 2% Aerosil® R202 samples higher than the baseline material. The G1C and G 2C values of all the epoxy nanocomposites were below t
This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows t...
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This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows that the equilibrium of the POD model is unstable and a static output feedback controller cannot stabilize it. We develop Linear Quadratic (LQ) optimal state feedback controllers and LQ optimal observers for the linearized models. The linear controllers and observers are applied to the nonlinear system using simulations. The controller robustness is numerically tested with respect to different POD models generated at different forcing frequencies. An estimation for the region of attraction of the linear controllers is also provided.
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