搜索 - 科创

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因为计算书没有公开，所以对于选型的问题，很多人有疑义。但是我认为这个方案是没有问题的。等下补上计算书。另：10M带宽下热噪声不可小视，50欧电阻上，BW带宽内，热噪声功率：Pn = -174dbm +...

此机很多销售于日本，用于国内需要改频。最近处理一台，拆开看看。侧面有个小盒子，存放耳机。盒子上放是定时器旋钮。机械定时器窗口，可以实现1小时以内的自动开机，或者自动关机。该机最大使用感受，是音质好...

2018年的诺贝尔物理学奖，授予了来自于美国的Arthur Ashkin，法国的Gerard Mourou和他的学生、加拿大的Donna Strickland女士。奖项的50%授予Arthur As...

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