As distributed projects get bigger and bigger, hardworking programmers will begin to face a challenge, and configuration files will become more and more complicated, although spring provides a chicken rib solution, spring.profiles.active In the large-scale distributed project system, it's better than nothing. The pain of manual maintenance of c ...
Posted by michealholding on Mon, 29 Jun 2020 06:15:03 +0200
Pandas can handle time series in any field. Using Numpy's datetime64 and timedelta64 types, pandas integrates many functions from other Python libraries, such as Scikits.TimeSeries , and create a lot of new functions for processing time series data.
1, Timing creation
1. Four types of time variable ...
Posted by tripleaaa on Mon, 29 Jun 2020 06:01:26 +0200
1. Bubble sorting: average time complexity (O(n^2))
① Compare adjacent elements. If the first is bigger than the second, exchange them.
② Do the same for each pair of adjacent elements, from the first pair at the beginning to the last pair at the end. At this point, the last element should be the maximu ...
Posted by jimmygee on Mon, 29 Jun 2020 05:58:50 +0200
1, HTML introduction
1. What is HTML
HTML: Hyper Text Markup Language
All kinds of tags are used to make web pages and tell browsers how to display pages
Make web pages, control the display of web pages and content
Insert picture, music, video, animation and other multimedia
Posted by RobOgden on Mon, 29 Jun 2020 05:36:00 +0200
Durid is a widely used database connection pool, which has superior performance, powerful monitoring mechanism, and also supports expansion through the mechanism of filter.
Druid has a StatFilter for slow sql recording, but I found some shortcomings in using it:
The print log of this Fi ...
Posted by jonsof on Mon, 29 Jun 2020 04:13:38 +0200
In the development of high concurrency system, there are four tools to protect the system: diffluence, cache, degradation and flow restriction. Based on the author's experience, this paper introduces the related concepts, algorithms and conventional implementation of current limiting.
Concept interp ...
Posted by plapeyre on Mon, 29 Jun 2020 04:11:04 +0200
Lucene (Chinese interpretation web search engine; full text search; search technology; vertical search engine;)
Lucene is a sub project of 4 jakarta project group of Apache Software Foundation, which is an open-source full-text search engine toolkit, but it is not a complete full-text sea ...
Posted by ckjian on Mon, 29 Jun 2020 03:36:01 +0200
File descriptionab is a useful stress test tool that comes with apache. When Apache is installed, ab can be found under binDownload Link
1,yum -y install httpd-tools
View information: ab-V
Unzip after downloading and a ...
Posted by Sangre on Mon, 29 Jun 2020 01:52:59 +0200
CRC checks (cyclic redundancy checks) are the most commonly used checks in data communication.In embedded software development, CRC algorithm is often used to verify various data.Therefore, mastering basic CRC algorithms should be a basic skill for embedded programmers.However, few embedded pr ...
Posted by mispris006 on Sun, 28 Jun 2020 18:57:15 +0200
02-VGNet Learning Notes
The following are personal learning notes for reference only
1. What percentage of the parameters are less for three 3*3 convolutions in VGG than for one 7*7 convolution?(Assuming both input and output channels are C)
2. What is the difference between VGG-16 and VGG-19?
3. Wh ...
Posted by coolcat on Sun, 28 Jun 2020 18:42:46 +0200