Research on the security of the world in Nuclear weapons threatens

: This article focuses on nuclear security, models the locations of nuclear bomb explosions. The conclusion is that although nuclear weapons cannot destroy the earth for the time being, their spread will threaten the survival of mankind. We found that there are now 10 countries in the world that have nuclear weapons. In terms of reductions, this makes the United States the country that has cut the number of nuclear weapons by the most over the past 20 years. In terms of number of additions, Pakistan led the way with 133 additional nuclear weapons. The five-year period from 1962 to 1966 saw the largest number of nuclear weapons tests, with 422. For question D, we construct two indicators: the increase in the number of nuclear weapons and the number of nuclear weapons tests. After the entropy weight method is used to determine the weight, TOPSIS evaluation model is established, and it is concluded that North Korea and Iran are the most active countries in the study of nuclear weapons. The United States changed its attitude from "not considering nuclear weapons" to "possessing nuclear weapons" in just seven years, the fastest change of attitude among nuclear powers. We call on all countries in the world to actively participate in the struggle for nuclear security and jointly safeguard the future of mankind and the planet.


Introduction
Since 1942, when mankind formally entered the atomic energy era with the achievement of a stable uranium fission chain reaction at the Chicago No. 1 reactor, the use of atomic energy has provided many conveniences to human life [1][2].Nevertheless, three serious nuclear leakage accidents have occurred around the world, namely, the 1979 nuclear leakage accident in the United States, the 1986 Chernobyl accident in the former Soviet Union and the 2011 accident at the Fukushima Daiichi nuclear power plant in Japan [3].These three nuclear accidents have caused irreparable damage to the human living environment.Nuclear leakage poses a great challenge to the natural environment in which human beings live [4].Radioactive substances generated by nuclear accidents pose a great threat to the living environment of human beings in the course of their proliferation [5].Although the probability of a nuclear leakage accident is very low, there is a consensus on the hazards and threats posed by nuclear leakage accidents to all mankind.Today, the world is facing a major change not seen in a century, and tensions in international relations have led to the nuclear issue becoming a bargaining chip in negotiations among countries.In the light of the current situation of nuclear technology in different countries around the world, the study of future security issues around the world is crucial to the survival and development of all mankind [6][7].
Nuclear weapons have great destructive power and usually include hydrogen bombs, atomic bombs and neutron bombs.As a highly destructive weapon, the proliferation and misuse of nuclear weapons will inevitably threaten world peace and development.During the Second World War, nuclear weapons made their debut on the stage of history, and the tragic accidents in Nagasaki and Hiroshima in Japan triggered people's thinking about the safety of nuclear weapons [8].Insofar as the "Tsar Bomb", the most powerful known, is concerned, its explosion shifted the Eurasian continent to the south by about 9 millimeters [9][10].
With the growing call for peace, more and more countries are joining the fight to maintain nuclear safety.Among them, one wonders whether nuclear weapons will destroy the Earth.Will the number of nuclear weapons increase or decrease in the next 100 or 200 years?And how many countries will become nuclear-weapon States?

The fundamental of data analysis
First, in the MATLAB environment, we visualized the number of countries considering, pursuing and possessing nuclear weapons globally, as shown in Table 1.As shown in Figure 1, as of 2022, there are a total of nine countries that possess nuclear weapons globally.Of these, South Africa renounced nuclear weapons and declared itself a non-nuclear state in 1991.
The data we study in this paper comes from: Nuclear Weapons -Our World in Data.We screened the data in Table 2 for the number of nuclear weapons in the 10 nuclear-armed states in 2003 and 2022, and the results are shown in Table 2.
In terms of reductions, according to table 2, the number of United States nuclear weapons will decrease from 10,027 in 2003 to 3,708 in 2022, a total reduction of 6,319, or 63.02 per cent, while the number of Russian nuclear weapons will decrease from 9,076 in 2003 to 4,477 in 2022, a total reduction of 4,599, or 50.67 per cent.It is clear that the United States has made the largest reductions, both in terms of numbers and in terms of percentages.We used a summation function to calculate the number of nuclear weapons tests per year versus the number of nuclear weapons tests per five-year period.1962 to 1966 had the highest number of nuclear weapons tests, totaling 422.The blue curve in Figure 2 represents the sum of each five-year period and the red curve represents the sum of one year.For example, the data for 1949 are the sum of the data for 1945, 1946, 1947, 1948 and 1949.We need to select some indicators from the available data to quantify "active".For the nucleararmed states, we extracted data from Tables 2 and 3 and selected two indicators to quantify "active"; for the nuclear-threshold states, due to the lack of data on nuclear weapons experiments and stockpiles, we extracted data from Table 4 for analysis.Using Table 4, we screened for countries still considering or pursuing after 2013, yielding Iran always pursuing and Syria always considering.Based on Table 3, we conclude that among the nuclear threshold countries, Iran is the most active in nuclear weapons research.

The establishment of data analysis
Considering that different indicators have different levels of possible influence, and in order to avoid subjectivity, we used the entropy weighting method for objective weighting.
Step 1.We determine whether there are any negative numbers in the input matrix, and if so, normalise to a non-negative interval.
Step 2. We calculate the weight of the ith sample under the jth indicator and consider it as the probability used in the relative entropy calculation.
Step 3. We calculate the information entropy for each indicator, then calculate the information utility value, and finally normalise to obtain the indicator weights.
As can be seen in Table 5, the results of the entropy weighting method show that the weight of the number of nuclear weapon tests is 71.247 per cent and the weight of the increase in the number of nuclear weapons is 28.753 per cent, with the largest weight (71.247 per cent) being given to the number of nuclear weapon tests.

Figure 1 :
Figure 1: The Attitude of Countries towards Nuclear

Figure 2 :
Figure 2: Global Nuclear Test Times

Table 1 :
Countries with nuclear weapons in the world

:
Green are the legitimate nuclear states, i.e., the five permanent members of the United Nations.

Table 1 :
Number of nuclear weapons in the 10 nuclear-armed States, 2003 versus 2022

table 2 ,
Pakistan has the largest increase in terms of number of nuclear weapons, from 32 in 2003 to 165 in 2022, a total increase of 133.

Table 2 :
Iranian research in nuclear weapons research

Table 3 :
Quantifying Active Indicators The red highlight indicates a decrease in the number of nuclear weapons in the country compared to 2013, which we have recorded as zero to avoid negative numbers.

Table 5 :
Quantifying Active Indicators