142. O(1) Check Power of 2[easy] Using O(1) time to check whether an integer n is a power of 2. Have you met this question in a real interview? Yes Example For n=4, return true; For n=5, return false; Challenge O(1) time 解法一: class Solution { public:…

/*************************************************************************** * Linux power supply class hacking * 声明: * 本文主要是记录linux电源管理的工作机制是什么,那些供Android jni使用 * 的属性文件是如何生成的,调用机制是什么. * * 2016-2-23 深圳 南山平山村 曾剑锋 **************************************…

The AD736 true-rms-to-dcconverter is useful for many applications that require precise calculation of the rms value of a waveform. This converter can determine the true rms value, the average rectified value, or the absolute value of a myriad input w…

Engineering labs are usually equipped with various power supplies, voltmeters, function generators, and oscilloscopes. One piece of equipment missing from many such labs, however, is a current source. This omission is unfortunate, because a current s…

1. 前言 power supply class为编写供电设备(power supply,后面简称PSY)的驱动提供了统一的框架,功能包括: 1)抽象PSY设备的共性,向用户空间提供统一的API. 2)为底层PSY驱动的编写,提供简单.统一的方式.同时封装并实现公共逻辑,驱动工程师只需把精力集中在和硬件相关的部分即可. 本文将从设计思路.软件架构.API说明以及怎么编写power supply driver四个角度,介绍power supply class.并会在下一篇文章中,分析power s…

故障log: %C4K_IOSMODPORTMAN-4-POWERSUPPLYBAD: Power supply 2 has failed or been turned off 在单机的情况下,我们可以很容易的判断是哪一个Power Supply故障了,但是在VSS环境下,没有注意过这类log,可能有点迷糊,这哦Power supply 2是指Switch 1的PS呢还是Switch 2呢? 实际情况如下: 如果是Standby的电源故障了,会是如下情况: *May  1 09:23:45.23…

Description Symptom:Following error messages will be seen intermittently.%PFMA-2-PS_FAIL: Power supply 2 failed or shutdown (Serial number DCBxxxxx)%NOHMS-2-NOHMS_DIAG_ERR_PS_FAIL: System minor alarm on power supply 2: failed or not powered up%KERN-3…

examination questions Using O(1) time to check whether an integer n is a power of 2. Example For n=4, return true; For n=5, return false; Challenge O(1) time 解题代码 class Solution { public: /* * @param n: An integer * @return: True or false */ bool che…

Using O(1) time to check whether an integer n is a power of 2. Example For n=4, return true For n=5, return false Challenge O(1) time Tags Expand 这道题考察bit manipulation. 1的个数只能有1个才是power of 2. 主要是要注意Integer.MIN_VALUE,这个只有一个1,但是是false class Solution {…

Description Using O(1) time to check whether an integer n is a power of 2. Example For n=4, return true; For n=5, return false; Challenge O(1) time 题解:题目要求判断一个数是不是2的幂次方,并且规定时间复杂度为线性级.那么,就不能用常规的循环求解思路去解题了,之前做过一个不用加号求两数之和的题目.这两个题目有点类似,可以通过位运算来快速求解.先考虑这…