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A multilevel converter topology with common flying capacitors (CFC) was proposed recently. It has the advantage that fewer components are required, thus lower cost and higher power density are possible to be realized. However, due to the common circuit shared among different phases, voltage level skips are easy to be caused, which will make the system suffer surge voltage and could be a threat to...
In the agricultural research of crop yield estimation and surveillance, it is important to find out the way to detect the chlorophyll content of crops exactly and quickly. In this paper, we used the chlorophyll content of live corn leaves as the research object. Utilizing the portable fiber spectrometer, we detected the absorption spectra of live corn leaves, and set up an absolute quantitative analysis...
In the long-term process of use, due to the influence of various factors as material aging, load effect and environmental change, a certain degree of deformation will occur to the foundation and superstructure of the brige, the long-term monitoring for the deformation of the bridge as well as its influencing factors and the establishment of mathematical models for predicting deformation will contribute...
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