传统的可调整线性电源在输出电压低时，电源的大部分额定功率耗费在电源内部，变换效率很低，而且体积庞大笨重。
At low output voltage, the majority of the rated power of traditional adjustable linear power supply is wasted in the internal power supply and the conversion efficiency is low with huge volume.
基于傅里叶变换近红外漫反射光谱技术探讨了水果内部品质快速自动检测的新方法。
The methods of automatic measurement of intact fruit internal quality were investigated based on Fourier transform near-infrared spectroscopy, and the system was also developed.
应用线性组合算符和幺正变换方法，得出了极化子内部激发态与耦合强度和磁场的关系。
The variational relations of the internal excited states of polaron with coupling strength and magnetic field were derived by using the linear combination operator and unitary transformation methods.
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