نتایج جستجو برای: shoot through st state
تعداد نتایج: 2181478 فیلتر نتایج به سال:
Integrated gate-commutated thyristors (IGCTs) have successfully demonstrated to be well-suited devices for an application in medium-voltage dc transformers based on LLC resonant converter topology. This appli- cation enables unusually high switching frequencies kilohertz range thanks the zero-v...
Introduction Nitrogen fixation by legumes is the product of a symbiosis of legume plants and a group of bacteria known as rhizobia (Carroll, et al., 1985; Kinkema, et al., 2006). It has been hypothesised that when rhizobia receive flavonoid signals from the host plants, production of a chemical nodulation factor is induced. The perception of nodulation factor by legume roots then activates a si...
Acid soils are abundant in tropical and subtropical regions and account for approximately 40 percent of arable land in the world. Next to oxygen and silicon, aluminum (Al) is the third most abundant element in soils and is the main toxic factor for plant growth in acidic soils. Therefore, two glasshouse studies were conducted to determine the influence of Al on root and shoot mass and nutrient ...
PREMISE OF THE STUDY Because legumes can add nitrogen (N) to ecosystems through symbiotic fixation, they play important roles in many plant communities, such as prairies and grasslands. However, very little research has examined the effect of projected climate change on legume growth and function. Our goal was to study the effects of temperature on growth, nodulation, and N chemistry of prairie...
The class I KNOX transcription factors SHOOT MERISTEMLESS (STM) and KNAT1 are important regulators of meristemmaintenance in shoot apices, with a dual role of promoting cell proliferation and inhibiting differentiation. We examined whether they control stem cell maintenance in the cambium of Arabidopsis hypocotyls, a woodforming lateral meristem, in a similar fashion as in the shoot apical meri...
We propose a method which acquires a purposive behavior for a mobile robot to shoot a ball into the goal by using a vision-based reinforcement learning. A mobile robot (an agent) does not need to know any parameters of the 3-D environment or its kinematics/dynamics. Information about the changes of the environment is only the image captured from a single TV camera mounted on the robot. An actio...
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