其实这个图是来自于我的写的仿真代码，那这个问题一定在代码里面，我们来慢慢分析。 模拟信号包含了一个 白噪声 成分，噪声密度设定为 50 nV/√Hz，这在高频部分可能导致较强的噪声波动。频谱中的尖峰很可能是由噪声引起的，特别是在高频区域，噪声的 ...

January 18, 2026 • In a joint statement, leaders of eight countries said they stand in "full solidarity" with Denmark and Greenland. Denmark's Prime Minister Mette Frederiksen added: "Europe will not ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...