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  • 06-29 2022
    Herry.Han
    The Frogbing system includes more than 400,000 items: (408176 ROW (s) Affected)  
  • 02-07 2022
    Herry.Han
    全文引用自: https://www.cnblogs.com/noryes/p/5716673.html 朔方 算法系列:日歷算法 Copyright © 1900-2016, NORYES, All Rights Reserved. http://www.cnblogs.com/noryes/ 歡迎轉載,請保留此版權聲明。 ---------------------------------------------------------------------------------------     轉載自http://blog.csdn.net/orbit/article/details/7749723 1、概述     日歷在我們的生活中扮演著十分重要的角色,上班、上學、約會都離不開日歷。每年新年開始,人們都要更換新的日歷,你想知道未來一年的這么多天是怎么被確定下來的嗎?為什么去年的國慶節是星期五而今年的國慶節是星期三?那就來研究一下日歷算法吧。本文將介紹日歷的編排規則,確定某日是星期幾的計算方法,以及如何在計算機上打印某一年的年歷。     要研究日歷算法,首先要知道日歷的編排規則,也就是歷法。所謂歷法,指的就是推算年、月、日的時間長度和它們之間的關系,指定時間序列的法則。我國的官方歷法是中國公歷,也就是世界通用...
  • 01-17 2022
    Herry.Han
    https://product.tdk.com.cn/zh/contact/faq/capacitors-0010.html 電橋測試時功能選擇Cp(Cp-D)或Cs(Cs-D) 阻抗分析儀表可以測量稱作Cp的并聯電容或稱作Cs的串聯電容4。電路模式將取決于電容器的電容值(圖1)。當C小而阻抗大時,C和Rp之間的并聯阻抗將會明顯高于Rs。因此用于測量電容量的儀表設置應為Cp。當C大而阻抗小時,C和Rp的并聯阻抗不太大。因此,儀表設置應使用Cs來測量電容量。選擇阻抗設置的一個好的經驗規則是,對大于10kΩ的電容器阻抗值使用Cp,對小于10Ω的使用Cs。 圖1: 阻抗等效電路...
  • 10-19 2021
    Herry.Han
    https://e2e.ti.com/blogs_/b/powerhouse/posts/how-to-reduce-acoustic-noise-of-mlccs-in-power-applications Other Parts Discussed in Post:?TPS51622 Multilayer ceramic capacitors (MLCCs) are popular in power electronics designs compared to traditional polymer capacitors for many reasons: An MLCC provides: A small profile with relatively higher capacitance. Very low equivalent series resistance (ESR). Very low equivalent series inductance (ESL). Lower impedance at higher frequencies. Non-polarization for easier mounting and manufacturing. Higher reliability over time compared to tantalum and aluminum electrolyte capacitors. Lower unit costs. However, MLCCs do not always sit quietly on the board and do their job. Sometimes they get bored and start to “sing.” This is due to the piezoelectric effect of the ceramic material, which has the same characteristi...