Power Query和Power Map是微软前不久在WPC上发布的Power BI中新的针对Excel的功能.借助这两样功能,自助式BI将更方便你发现和处理数据并且丰富数据的可视化功能. Power Query和Power Map的前身分别是Data Explorer和GeoFlow,这两样功能在SQL Server 2014 CTP1里都有提到.结合Power Pivot和Power View,这四大功能组成了微软最新的Power BI系列. 本文源自微软商业智能官方博客里的内容,主要演示…
The schematic in Figure 1 shows a way to increase the power available from a current-limited 5V supply by adding power from a –5V supply. The dc/dc converter generates a single 12V, 150-mA (1.8W) output from two regulated and current-limited input so…
Pain and Pain Management 疼痛与疼痛管理 ①Years ago,doctors often said that pain was a normal part of life.In particular,when older patients complained of pain,they were told it was a natural part of aging and they would have to learn to live with it. ②Time…
Check Power of 2 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; 奇数总是有超过2个1. class Solution { public boolean checkPowerOf2(int n) { ) return false; )) == ? true : false; } }; Check…
