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To address the shortage of supply of urban infrastructure, a large amount of private capital is required to participate in construction and operation of the urban infrastructure project. At present, the policy has allowed the private capital to participate in such project through project financing pattern (such as BOT, TOT and PPP, etc.). In order to attract more private capital to participate in...
Urban greening is one of the important issues to improve the urban living environment, to improve the quality of people's life, to realize urban sustainable development, but also the important component of building a conservation-conscious society and low-carbon environment. This article is based on the operation point of view, analyzed the emergence ,connotation and significance of the concept of...
Plant is one of the fundamental elements of the urban ecological environment and landscape, and the plant landscape information visualization is an important development trend of industrial information system. The plant landscape information visualization can be used to highlight the value and effect of plant landscape from many aspects, draw the spatial framework of plant landscape and conduct spatial...
On the basis of analyzing three-level inverter direct torque control principle (DTC) , a new synthesizing vectors PWM method of three-level DTC is presented, which can not only effectively control neutral- point voltage, but also restrain higher dv / dt of output voltage and improve three-level DTC output performance ,reduce torque ripple. Through theory analysis and experiment research, the author...
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