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Spectral efficiency and energy efficiency are fundamental trade-off in wireless communications. Spectral efficiency (SE), defined as the average data rate per unit bandwidth, quantifies how efficiently the available spectrum is utilized. Energy efficiency (EE), defined as the successful transmitted information bits per unit energy from transmitter to receiver, quantifies how efficiently the energy...
This paper presents a detailed study process of life cycle energy consumption and CO2 emission for transmission system. An assessment framework that consists of six stages is established, within which the energy consumption and CO2 emission contributions from all life cycle chains are considered. A typical 500kV single-circuit AC transmission system in China is taken for instance to illustrate the...
The present paper inspected the actual standby power consumption of commonly used office equipment and microcomputers as well as trailed and studied the use of the office equipment of three typical enterprises in Kunming. The results showed that the office equipment has a huge standby power consumption and there is a broad space in energy saving and emission reduction. An enterprise can save plenty...
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