A Chinese spy balloon that passed over the United States last year was packed with American technology that could have ...

Kenya Power has listed some areas across the country scheduled for power interruption on Wednesday.The utility firm announced that parts of six counties will experience power interruption to allow ...

A winter storm hit the Boston area Thursday, projected to bring 2 to 4 inches of snow. But, 47 years ago, the region ground ...

However, the latest long-range weather maps show that this could be just a bit of a chill compared to what's cooking to the ...

▲摘要：物理系统的对称性和拓扑结构与控制拓扑性质的对称性密切相关。准晶体是有序系统，但没有平移或旋转对称性。理论研究表明，准晶体可以理解为高维晶体在低维空间上的投影。

The domestic flight test suite using an unmanned aircraft system helps reduce the timeframe of carrying out flyovers of flight support radio-technical equipment ...