stepcount | 一个还算准确的计步器算法／a step count algorithm | Learning library

This is my first post here and I am not that experienced, so please excuse my ignorance.

I am building a Monte Carlo simulation in C++ for my PhD and I need help in optimizing its computational time and performance. I have a 3d cube repeated in each coordinate as a simulation volume and inside every cube magnetic particles are generated in clusters. Then, in the central cube a loop of protons are created and move and at each step calculate the total magnetic field from all the particles (among other things) that they feel.

At this moment I define everything inside the main function and because I need the position of the particles for my calculations (I calculate the distance between the particles during their placement and also during the proton movement), I store them in dynamic arrays. I haven't used any class or function,yet. This makes my simulations really slow because I have to use eventually millions of particles and thousands of protons. Even with hundreds it needs days. Also I use a lot of for and while loops and reading/writing to .dat files.

I really need your help. I have spent weeks trying to optimize my code and my project is behind schedule. Do you have any suggestion? I need the arrays to store the position of the particles .Do you think classes or functions would be more efficient? Any advice in general is helpful. Sorry if that was too long but I am desperate...

Ok, I edited my original post and I share my full script. I hope this will give you some insight regarding my simulation. Thank you.

Additionally I add the two input files

parametersDiffusion_spher_shel.txt

parametersIONP_spher_shel.txt

For this question, I do not know what is wrong with the return usage here.

I am working on a small checkout stepper with Vue (v 2.x.x).

The current item should have the class name "active" while all the previous ones have the class name "completed", as illustrated bellow:

Recently I got an error that I cannot solve despite having everything needed in my gradle and imports. I tried restarting the app, rerunning it and changing the imports but nothing changed. Android studio cannot resolve symbol 'view', is about the variable. Maybe is something that I missed. I don't know.

Here are the imports I think are needed:

Ok. I will try to explain my case as good as I can.

Basically, I have this function here that will add an increment to my bootstrap progressbar:

I am invoking Healthkit through React Native's NativeModules.
I can get the Authorisation part to work.

healthkit.m:

I need to access elevation gain, cadence and running pace (not average but for like each kilometre) workouts are from AppleWatch.

Is there any way how to get access to those data. Currently I have access for the workout's duration, distance covered ... is there any metadata for these? I can not find anything in Apple's documentation for HealthKit.

I have figured now that I have to do queries for stepCount and distanceCovered to get the pace and cadence, but still can not get access to elevation gain data.

When app works fine

When app not shows textviews(its finding a sensor. When cant find, giving info on textview like 'didnt found')

I created a pedometer app. It was working well on my emulator and my own android device. But when ı publish that app my friends said textviews are invisible. I examined that problem in code but didnt found a problem. Textviews are getting their text from sensor. Writing steps and calories, after some calculating. Why that problem showed up? What is the source of this problem? Why is this happening?

I am a student taking my first python class and we are using Turtle to draw an image. In an effort to save time I am trying to create a mirror function that can flip one functions results over the y-axis by a given number of pixels. For the sake of simplicity I created some functions to speed up my coding. Here is how my code works: