The vital problem of the mobile communication is how to using the limited spectrum resource to match the distribution of user demand in the space and time.
其中移动通信技术最主要关注的一个问题就是如何利用有限的频谱资源，满足用户需求在空间和时间上的分布。
The utilization rate of licensed spectrum is very low in the time domain, frequency domain and space domain, while the unlicensed band is overcrowded seriously.
大部分授权频段在时域、频域和空间域的利用率很低，而公共频段出现了严重的频谱拥挤。
The equilibrium thermal radiation in a curved space-time shows Planco black body spectrum given by coordinate quanties.
弯曲时空中的平衡热辐射，表现出用坐标量表示的普朗克黑体谱。
Space-time distributing character of precipitation field in Akesu-river drainage-basin were studied by REOF, spectrum, and harmonic analysis.
将旋转经验正交函数（REOF）和谱分析和谐波分析相结合深入分析阿克苏河流域的降水量场的时间变化和空间分布。
Space-time distributing character of precipitation field in Akesu-river drainage-basin were studied by REOF, spectrum, and harmonic analysis.
将旋转经验正交函数（REOF）和谱分析和谐波分析相结合深入分析阿克苏河流域的降水量场的时间变化和空间分布。
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