0 1. As can be seen from their names, they have different meanings.
Mathematically, the peak value refers to the maximum value in a certain period of time, which is called the peak value. However, as in the function diagram, the peak value is not necessarily the maximum value. It's just that there are many similar small fragments in the fragment you extracted, which may have a larger value.
The inflection point represents a concave-convex dividing line, just like a small soil slope. The road ahead is uphill. After the inflection point, it must be downhill. It's different from the peak period. It keeps its word and goes home when it is time to go home, without any nostalgia.
02. What does the peak represent? On that day, the number of people increased to the maximum, but it does not mean that it will decrease after this day.
Can we imagine the electrocardiogram in the hospital, or the stock price chart in the stock market, full of twists and turns? Every small tip can be said to be a peak, but anyone who has seen these pictures knows that there is a big tip behind the small tip, which does not mean that it will not increase after reaching the peak.
Otherwise, is it a bit scary for a stock price to plummet and skyrocket? So is the beating of the heart. Jump fast for a while and slow for a while. I don't know, but I thought it was a confession, and my heart was full of anxiety!
The same is true for the epidemic. The peak only means that there is a big outbreak on this day, and the number of patients has reached the maximum in recent days, but there will be no obvious big increase in the future.
Just like walking up a step on the road, then walking on it and keeping up with the stairs (although the interval between each step is a little long), every point on the right angle of the step is a peak, and there is a higher peak behind it, and the value displayed on the coordinate system is larger than the previous one.
03. The inflection point is different, which means that things have improved, and now the original increase is beginning to fall.
The inflection point is different. It's like climbing a mountain, climbing it through hardships, and finally reaching the highest point, that is, the inflection point, and the road behind it is downhill.
Even if two mountains are connected together, like two parabolas, you have to go down a distance to get up.
The inflection point of the epidemic is much simpler. When the number of patients in the whole country drops obviously, no longer rises, or rises slowly, and the rise and fall are not much, that is the turning point.
It can also be simply said that the peak represents that the epidemic has reached the maximum in recent times and may increase in the future, but the line of short-term rise is flat, and the inflection point represents that the epidemic has improved. You don't have to worry about how many people are here a day. Just wait at home and you will soon be able to return to normal life.