freRecovery

农历，阳历，月历，节日，节气，生肖，星座，近代史，可直接使用-Lunar, solar calendar, the calendar, the festival, the cycle of the 12 constellations, the modern history of direct access

说明：  python flask advance

一个竖长的带缩略图幻灯片切换代码，曾经在中国移动12530网站上使用过，现在整理出来了，你可以用在自己的网站上。效果描述：鼠标放在最下边的小图上，对应的大图片淡入淡出切换显示，大图带文字说明。

利用LS方法捕捉气液相界面，界面处的阶跃以及相变的处理方式(LS method is used to capture the interface between gas and liquid, the step at the interface and the way of phase transformation.)

说明：  新冠肺炎简单预测模型，基于SEIR模型改进后的传染病模型(Novel coronavirus pneumonia prediction model)

用于在前端重置NC56用户名密码，单点登录也可以(User name password for resetting NC56 at the front end)

说明：  Gamma measurement points for attention

说明：  距离多普勒成像算法，包含回波构造距离压缩方位压缩(Distance Doppler imaging algorithm, including echo structure Compression azimuth compression)

小型正确显示各种颜色的数值-small showing the correct color values

最近 LCC 谐振变换器备受关注，因为它优于常规串联谐振变换器和并联谐振变换器：在负载和输入变化较大时，频率变化仍很小，且全负载范围内切换可实现零电压转换（ZVS）。本文介绍了LLC型谐振变换器的分析方法，回顾了LLC型谐振变换器的实际设计要素。其中包括设计变压器和选择元器件。采用一设计实例，逐步说明设计流程，有助于工程师更加轻松地设计LLC谐振器。(Recently LCC resonant converter has attracted much attention, because it is better than that of the conventional series resonant converter and parallel resonant converter in the load and input change, frequency change is still very small, and the whole range of the load switch can realize zero voltage switching (ZVS). In this paper, the analysis method of LLC resonant converter is introduced, and the practical design elements of LLC resonant converter are reviewed. Including the design of transformers and components. A design example is used to explain the design process step by step, which is helpful for engineers to design LLC resonators more easily.)