测量了各装置的输入输出功率，计算了能量转换装置的转换效率和传输过程中的能量损耗，提出了改进系统的有效途径。
Input and output power of instruments was measured, and efficiency of energy conversion instruments and energy loss was calculated, and effective methods were put forward to improve the system.
仿真结果表明，非线性变结构控制可以有效地调节直流线路的传输功率，保证交直流系统的稳定性。
The result indicates the nonlinear variable structure control can adjust the transmission power of DC line effectively, and assure the stability of the AC-DC system.
中继传输能够有效地提高系统功率效率以及传输容量。
Relayed transmission is an efficient method to improve the power efficiency and system capacity.
基于子载波边际效用，提出了一种针对实时业务的资源优化分配算法，在满足其传输速率和误比特率的前提下，有效地降低了系统所需要的发射功率。
After that, a resource optimization method for real-time traffics is proposed, which minimizes the required transmit power while guaranteeing the QoS requirement of real-time traffics.
基于子载波边际效用，提出了一种针对实时业务的资源优化分配算法，在满足其传输速率和误比特率的前提下，有效地降低了系统所需要的发射功率。
After that, a resource optimization method for real-time traffics is proposed, which minimizes the required transmit power while guaranteeing the QoS requirement of real-time traffics.
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