Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
Nowadays, energy crisis is a world problem which has to solve. The technology of phase change for heat storage is signality for energy source allocation.
能源危机是当今世界迫于解决的问题，相变储热技术对于能源的合理配置意义重大。
This problem deals with the phase change of a substance with the boundary conditions specified at the moving boundary.
这问题讨论移动界面中带有边界条件物质的相变。
A problem often encountered in the research of materials is how to identify the type of phase change of crystals.
材料研究中经常遇到的一个难题就是鉴别晶相的相变类型。
A problem often encountered in the research of materials is how to identify the type of phase change of crystals.
材料研究中经常遇到的一个难题就是鉴别晶相的相变类型。
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