I want to find some foreign exchange MT4 indicators. The source code is attached. It can assist when trading. You can refer to it when writing indicators. You can edit it when you want to improve it. Gann’s theory believes that financial investment markets such as stocks and futures also have natural rules in the […]
Tag: formula
[Practical] EasyExcel uses interceptors to set cell drop-downs (using excel formulas)
1. Brief introduction During the system development process, we will encounter various export and import requirements. EasyExcel is currently a popular export and import framework in addition to POI. The advantages and disadvantages of EasyExcel and POI will not be introduced here. The main introduction is The following is a demand scenario: the attribute value […]
[Mathematical formula derivation] Meng Xiong [csp-noip ten consecutive test set 6] T2 distance
Thanks to Jayun for technical support Original question formula: ∑ i = 1 n ∑ j = i + 1 n ( ( x i ? x j ) 2 + ( y i ? y j ) 2 ) \sum_{i=1}^{n}\sum_{j=i + 1}^{n}{((x_i-x_j)^2 + (y_i-y_j)^2)} i=1∑n?j=i + 1∑n?((xixj?)2 + (yiyj?)2) Just consider first x x […]
Research and discussion on the solution of converting LaTeX mathematical formulas to images in Python environment
Introduction Recently, some formula recognition projects have been involved. The input is an image of the formula, and the output is a mathematical formula string in LaTeX format. Such projects generally use deep learning methods, which involves constructing formula LaTeX strings and data sets corresponding to rendered images. to train the model. After research, there […]
RGB and YUV formula conversion and derivation
Table of Contents Introduction Full Range formula derivation Limit Range derivation Verification Test References Introduction There are many standards for conversion between RGB and YUV. The coefficients of different standards are different, and it is often easy to get confused. There are also differences between full range and limitrange. In fact, these conversion coefficients are […]
LaTeX formula and table drawing skills
LaTeX formulas and drawing techniques The formula can basically be divided into Single formula single number Single formula numbered by row Single formula multiple subnumbers Single formula part subnumber piecewise formula Now give the respective codes Single formula single number Formula 1: equation + aligned \begin{equation} \begin{aligned} a= &b + c\ b= &a + 2\ […]
Stop worrying about the size of the thread pool and the number of threads. There is no fixed formula.
Many people may have seen a theory about setting the number of threads: CPU-intensive programs – number of cores + 1 I/O intensive programs – number of cores * 2 No, no, does anyone really plan the number of threads according to this theory? Small test of thread count and CPU utilization Putting aside some […]
A study on the difference between the initUndistortRectifyMap () function in OpenCV and the dedistortion formula in Lecture 14
Article directory 1. The dedistortion formula in Lecture 14 2. Dedistortion formula in OpenCV 3. Difference between 4 parameters and 8 parameters 4.initUndistortRectifyMap() function source code Recently, I discovered a problem when using OpenCV to dedistort fisheye camera images. The parameters used to dedistort based on the pinhole model are a little different from the […]
The winning formula for slow SQL
In preparation for major promotions, one of the biggest hidden dangers is slow SQL, which is the most destructive to the smooth operation of services. It is also the biggest hidden danger that often causes jitter to the entire application in daily work. How to avoid slow SQL in daily development? We must know what […]
[Algorithm and Data Structure] Code implementation of merge sort (detailed illustration) and explanation of master formula
Table of Contents 1. Merge sort 1.1. Algorithm description 1.2. Illustrations 2. Code implementation 3. master formula 3.1, formulas and conclusions 3.2. Suitable for certain special recursions 3.3. Calculate the time complexity of merge sort 1. Merge sort Merge sort is an effective sorting algorithm based on merge operations. This algorithm is a very typical […]