PID：ID of the processUSER：Process ownerPR：The priority level of the process is smaller and the priority is implemented.NI：nicevalueVIRT：Virtual memory occupied by processRES：Physical memory occupied by processSHR：Shared memory used by processesS：The state of the process. S means dormancy, R means running, Z indicates dead state, and N indicates that the process priority is negative.%CPU：Process occupancy rate of CPU%MEM：The percentage of physical memory and total memory used by processesTIME+：The total CPU time occupied after the process starts, that is, the cumulative v...
Recently I have been thinking about a thing, just graduated from the moment full of ambition, impatient to finish things, although the quality is poor. But now I don’t want to do anything, even if it’s important. What kind of psychology is this?
1、Add class name:
document.getElementById("myDiv").classList.add("myStyle");
2、Delete class name:
document.getElelmentById("myDiv").classList.remove("myStyle")
3、Check whether there is any CSS fatigue:
myDiv.classList.contains("myCssStyle")
//return true or false
Note: when we add multiple class names, we write them side-by-side and separate them with commas.
This section focuses on:
How to find out the relationship between two tables
Three relations of tables
1. Introduction
Because of the constraint of foreign key, the two tables form three relationships:
Multi to one
Multiple to many
One-on-one
Two, focus on understanding if you find out the relationship between the two tables.
Three, three relationships of tables
（1）Books and publishers
One to many (or many to one): a publishing house can publish many books. Look at the picture and talk.
Association mode: foreign key
create table press(
id int primary k...
Preparatory work, there is a machine that can be connected with liunx system.
First, download the yum series packages from the Networked Machine (the Yum command can only be installed in the form of an installation package if it does not exist, regardless of the absence of the yum command)
Modify the configuration file so that the yum command can only download, install, download or install the reserved packet.
Move the downloaded package to a net free environment machine. FTP hanging with you
Go to the package directory to configure the current package using the createrepo command.
Modify th...
“Allowed memory size of 134217728 bytes exhausted”
Today ,my server display this error info .My solution like this:
1.Because the default memory limit for PHP is 128M, you need to modify the php.ini file.
2.Find the line memory_limit = 128M and make 128M bigger. I change it directly to 2048M.
3.Restart the server and restart the Apache server by sudo/usr/sbin/apachectl restart. Of course, it is possible to use the terminal to execute PHP without restarting the server.
Restart PHP successfully, it will be OK
Li Jie, a special lecture professor at the University of Cincinnati and consultant to the White House Information Physics Systems and the US Challenge Project, shared his views on industrial data and how artificial intelligence can improve industrial data analysis at the China Conference on the Application of Large Data in 2017.
Beijing, July 20, 2007Data analysis insights.
Industrial big data
I have worked in the U.S. industry and government for 37 years. IMS Center was established in 2000. At present, there are more than 90 enterprise partners in the world, such as Mitsubishi Electric, GE,...
