2019/09/08 latest developments

Today the completion of the work as follows:

1. continue to improve the paper:

 

 

2. The simulation data found wrong, the original formula has a wrong place. . .

The revised formula is:

(1) When t1 <= 2.5s, v = v2

(2) When 2.7s> t1> 2.5s, v = v2 - ug (t ^ 2) /0.4|t=t1-2.5

(3) 当 t1> 2.7s, v '= v2 (0.2 * 0.2) (v1 / (a) + 0.1-2.7) *

3. simulation according to the formula. Write a cpp:

#include<bits/stdc++.h>
using namespace std;
double v2[]={24.52,48.26,67.99,85.24,100.76,115,128.2,140.6};
/*24.08,46.93,65.74,82.12,96.81,110.26,122.72,134.40,
23.54,45.34,63.11,78.50,92.27,104.85,116.49,127.38,
21.38,39.50,53.83,66.06,76.91,86.77,85.85,104.35,
19.85,35.76,48.16,58.68,67.97,76.39,84.15,91.38,*/
int main(){
    double v1[5]={20,30,40,50,60},u,s;
    while(cin>>u)
    {
        for(int j=0;j<8;j++)
        {
            for(int i=0;i<5;i++)
            {
                double vv2=v2[j];
                double t1=v1[i]/(3.6*u*9.8)+0.1;
                if(t1<2.5)
                    vv2=v2[j];
                if(t1>2.5&&t1<=2.7)
                {
                    //cout<<"*";
                    vv2+=u*9.8*(t1-2.5)*(t1-2.5)/0.4;
                }
                    
                if(t1>2.7)
                    vv2+=u*9.8*0.04+(t1-2.7)*u*9.8;
                cout<<setiosflags(ios::fixed)<<setprecision(2)<<vv2<<"   ";
            cout
            }<<endl;
        }
        
    }
    
    return 0;
}

4. Finishing experimental data obtained an improved velocity model of the amount of change.

Tonight and tomorrow plan:

1. The simulation data plan to do tonight is complete. And made into tables or charts.

2. Start writing reports tomorrow, for the draft articles written, sent to the teacher. Listen to the views of the teacher guidance, or else time is running short. . .

Feelings and experiences:

1. Why derivation formula I found wrong now. . . So be sure to look at the experimental data, experimental data, there was a lot of errors, I do not ponder. . I thought it was caused by excessive speed. . .

2. When working do not want other things to focus on.