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Vegetation green up reflects climate impact on landscape, thus monitoring this phenomenon is of crucial importance. This paper develops a bottom-up model to derive green up date using satellite data and ground observations to rebuild green up pattern in Inner Mongolia and analyzes relationships between phenology and climatic factors. The results show that (1) the green up thresholds mostly are at...
We report the growth temperature effect on the crystalline and optical properties of (1122) semipolar GaN and InGaN/GaN MQWs. It shows that a lower growth temperature at 1020 °C produces better crystalline and optical properties.
Design and Technical specification parameters of MWHS-II (MicroWaves Humidity Sounder) of FY-3 satellite are presented, which include much improvements compared to MWHS onboard FY-3A/B satellite launched in 2008 and 2010. Especially MWHS-II adds 8 channels at 118.75GHz to sound temperature information for the first time internationally. The simulation results show that MWHS-II will play an important...
Black earth is a well -known grain producing area in China. During these decades, water loss and soil erosion is getting worse and worse gradually, soil is getting thinner and thinner, soil capability drops, reduction on grain production is severe. The research focuses on dry arable black land in XingAn alliance, through field test on wind erosion factors in this area (wind speed, temperature, relative...
Here we present the design and implementation of a 130-MHz on-chip reference oscillator in a 0.18-μm 1-ploy 6-metal digital CMOS process. To compensate for the influences on the oscillation frequency by process, supply voltage and temperature (PVT) variations, the oscillator uses a bias adjustment technique without BJT devices, on-chip inductors or external components. Measurements of 8 samples in...
According to process requirements of Roller-hearth Normalizing Furnace, and non-linear characteristics of the temperature, the paper proposes a new nonlinear system prediction control algorithm instead of the tradition, which the accuracy of model is not high. The new control algorithm uses least squares support vector machine (LSSVM) optimized by improved particle swarm optimization (APSO) to establish...
The formaldehyde instantaneous concentration formula at a specific air exchange rate before the environment cabin is in the stable state is theoretically obtained, based on the basic formula of the formaldehyde concentration in the environment test cabin simulated as the indoor environment. The formaldehyde instantaneous concentration formula has been confirmed in the experiment about the relationship...
At first, the article presented particularly the experimental system of floor radiant heating of capillary tube, the arrangement form of capillary tube mat. And then, the experimental method was employed to study heating capacity of capillary tube mat, the characteristic of temperature change on the layer of capillary tube mat, the ceiling surface and indoor air. At same the time, BIN method was adopted...
This paper mainly studies the growth and degradation characteristics of the atrazine degradation strain J2 isolated from the soil collected from the cornfield in northern China with a long history of atrazine application. The growth and the degradation characteristics at different pHs, temperatures and in mediums with different salinity are also studied. The results indicate that: when J2 is inoculated...
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