Many people confuse the width of the computer bus with the bandwidth of the bus, but in fact, they are different.
Bus Width: Bus Width generally refers to the internal bus binary digits interconnected between the CPU’s calculator and memory, affecting throughput, as described belowbus width。
Bus bandwidth: Bus bandwidth refers to the total amount of data that the bus can transmit in a unit time, equal tobus widthThe product of the work frequency is the bus bandwidth.Data transmission rate。
For example:
Bus width is 32 bits, clock frequency is 200 MHz, if the bus every five clock cyc...
Topic: give the sequence of sequenced sequence of two binary tree and output the first value of subsequent sequence.
Train of thought: at first glance, it is not a pre order + middle order reconstruction of the two binary tree, and then the traversal of it. There is no mistake in doing so, but it does not really comprehend the intention of the subject. The problem is not to let us output the posterior sequence, but to output the first value of the ordinal sequence. Taking into account the order of traversal traversal is left sub tree -Gt; right subtree – & gt; root node, think abou...
[Reprint]
1. What is a server?
Server is a kind of computer on the network which provides various services for customer sites. Under the control of network operating system, it will provide the hard disk, tape, printer, Modem and expensive special communication equipment connected with it to the customer sites on the network to share, and also can provide centralized computing and database for network users.Management and other services.
● The role of network server: A． Run the network operating system. Through the network operating system to control and coordinate th...
fragment and copy
An index consists of multiple slices, each containing part of the document set. The replica is mainly designed to enhance fault tolerance and increase throughput.
The number of copies can be adjusted at any time, but the number of fragments can not be modified after the number is set.
type determination mechanism
The number type and date type can be set by automatic detection, which is usually opened by default.
dynamics_data_formats：Settings can be identified as a list of date formats.
You can also disable type guessing, and when type guessing is disabled, you can’...
The one or two fork search tree is the two fork tree.lookupThe extension of the domain has the efficiency of two points lookup and flexibility of chain entry.
The efficiency of two point lookup: once every iteration, the scope of search is reduced by half. For binary search trees, the scope of each search is reduced by one subtree (ideally half of the nodes).
Flexibility of chain insertion: Binary lookup tree is chain structure, so it has O (1) time efficiency of inserting and deleting list.
Note: After each iteration, the search range is reduced by only one node, and the search time effici...
The subtitle of the book is “The 50 Global Breakthrough Technological Depth Analysis of MIT Technological Review,” and the headline is only an eye-catching stunt. Even as IT practitioners and science enthusiasts, the 10 technologies that Massachusetts ranked in the 16-12 five-year period are still quite impressive. meanwhileThe reviews describe the background, principles, breakthroughs, and other aspects of each technology, giving me some insight into immune engineering, genetic editing, and other technologies that used to be known only by name; although there are magic leaps and ...
Original Bo:
https://blog.csdn.net/fredrik/article/details/79697963
WeChat small program to achieve WeChat payment function
It’s OK to replace the inside parameters with yours directly, if you want to open the Wechat payment function, you need the merchant number, appid, appsecret, openid.
//Small program end code:
pay:function(){
var that=this
wx.getStorage({
key: ‘openid’,
success: function(res) {
wx.request({
//Here’s the background processing method. The URL is self-defined, and you can change it to your own background processing method...
All files are stored in binary form on the computer, but sometimes we need to convert the binary to GBK or UTF-8 form, encode and decode when encoding. Here is a brief description of the role of Python binary in the file transfer process.
1，pythonWhich formats are binary transmission?
Video, pictures, music
2，pythonFunction of file binary
In the process of network programming, in the process of network transmission, people do not want to see the encoding, can use binary transmission, fast, safe and reliable.
3，pythonBinary usage of files
rb,Binary read mode
wb,Binary write mode
ab...
