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Showing 157–161 of 161 results

  • Development of Three-Dimensional Hot Bending and Direct Quench Using Robot

    Open Access

    Abstract: To achieve both weight reduction and crash safety improvement in automobile bodies, we have developed Three-Dimensional Hot Bending and Direct Quench (3DQ) technology, the first in the world. In this paper, we describe the overview and the effect of 3DQ with robot.

    Keywords: 3DQ, automobile body, hot bending, quench

  • Simulation of Illusion Based on Visual Characteristic of Spatial Frequency

    Open Access

    Abstract: In this paper, we propose the computation model of illusion of Hellman grid image. We
    simulate the phenomenon that dark spots appear on intersections of the white lines by using wavelet transforms. Additionally, we reproduced the phenomenon that the dark spot disappears in attention by the computation model based on spatial frequency. In order to confirm validity of the proposed method, we show the relationship between the illusion and the spatial frequency by the qualitative experiments with subjects.
    Keywords: Illusion, Simulation, Hellman grid, Spatial Frequency, Wavelet Transform

  • Modeling Early Crop Monitoring in China Using Photosynthetic Production Index

    Open Access

    Abstract: There is great pressure on population growth and water resources shortage in China. Aiming to monitor the early stage of crop growth, this paper presents a photosynthesis-based monitoring model for grain production. Not only the normalized difference vegetation index and elements such as the growing degree day are considered, the factors of sunshine and the cost of water resource are also considered in the model.
    Combining the meteorological data with the vegetation index that is adopted from remote sensing, the model contains the elements of solar radiation, effective air temperature, vegetation biomass, stomatal opening, water stress, and the influence of temperature on grain plants, such as low-temperature sterility and high-temperature injury.
    Keywords: Crop production index; Photosynthesis; Remote sensing; Monitoring; Water resource

  • Analysis of Vegetation Index and Soil Moisture in Beijing Area Using Satellite Data

    Open Access

    Abstract: The desertification process to China’s capital, Beijing area, is analyzed by using the state of vegetation, soil moisture and meteorological data collected by the satellites. The growth of vegetation, soil moisture and long-term changes of temperature and precipitation in the selected two study regions that are near Beijing is analyzed and compared (from 2002 to 2011). Thus the trend of desertification can be predicted, and the effective long-term protection and control strategy can be set up.
    Keywords: Desertification prevention; Vegetation index; Soil moisture; Temperature and precipitation; remote sensing

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