Programmer Group

Drill down to elastic search metric aggregation (1) In this paper, we focus on two types of aggregation: one is to generate single valued aggregation, the other is to generate multi valued aggregation. Single valued measurement aggregation mainly includes average, weighted average, minimum, maximum an ...

In the learning part of attitude control, multi rotor attitude control is taken as an example.1. Overall process Attitude control is mainly divided into several parts: Attitude error angle calculation = > target angular velocity calculation = > angular velocity PID This part focuses on the calcula ...

Preface "Trend is your friend" is a proverb familiar to every trader. But friends who have done deals may realize that trends always start without warning and end abruptly. So in CTA strategy, how to catch the trend and filter the volatile market is the tireless pursuit of many subjective and quantitative traders. In this course, we ...

Article directory Flow protocol and packet sticking Sticky bag readn writen Client sends fixed length package code Echo client / server echosrv.c echocli.c Reference material Flow protocol and packet sticking TCP is a transport service based on byte stream. It has no boundary and can not guar ...

13.5 dynamic memory management class The best way to manage dynamic memory in a class is to use containers or smart pointers, but maybe if we want to design a set of libraries ourselves, we need to keep the performance of this library at a better level. At this time, we may need to use some lower leve ...

Responsive layout# I. purpose: the same set of pages can be compatible with devices of different resolutions. 2. Implementation mode: using grid system to achieve: A row is divided into 12 squares. You can set an element to occupy several squares according to the size of the screen. III. steps: Step ...

Basic configuration of React project and solution of common pit 1, Create React project # Global scaffold installation npm install create-react-app -g --save # Create React project create-react-app my-app 2, Implement the loading of Less file 1. Expose profile # Expose the project's profile npm run eject Directory structure after profile e ...

When dealing with commodity futures, not all of them are fully automatic trading strategies. There are many semi-automatic and programmed trading tools to replace manual marking.Although this kind of tool is not a complete strategy, it is also based on the user's trading intent, and it is the simplest trading strategy to conduct transactions in ...

Course name | zero basic entry-level in-depth learning Lecturer: Sun Gaofeng, senior R & D Engineer of Baidu deep learning technology platform Department Teaching time: 20:00-21:00 on Tuesday and Thursday 01 reading guidance This course is Baidu's official zero basic in-depth learning course. It is mainly for students who have no in-dept ...

Dynamic threshold method for image white balance processing in IEEE Xplore 2015 Preface The following is quoted from: https://zhuanlan.zhihu.com/p/99622522 White spot detection The original image with size of w × hw × hw × h is transformed from rgbrgb space to YCrCbYCrCbYCrCb ...