One,
1. Men's team, women's team, men's singles, women's singles, men's doubles, women's doubles and mixed doubles.
2. 1988 men's singles, women's singles, men's doubles and women's doubles
3. knockout round robin
4.2 1 score 1 1 score 2 per game 1.
5. Ethnic settlements
6. Table tennis, football and tennis
7. The total number of games =n(n- 1)/2(n is the number of teams or people)
Number of participants-1
Second,
1. Single round robin is that all participating teams can meet once, and finally rank according to the points and gains and losses of each team in all competitions. If there are not many teams and the time and venue are guaranteed, this kind of competition is usually adopted.
2. Single knockout is a competition mode suitable for too many teams, which can reduce the schedule, complete the competition in a limited time, and determine the order of the competition by drawing lots, which embodies the principle of fairness and justice and is a system with a wide scope of application.
3. In sports events, because of the large number of participants, the elimination system is often used to shorten the competition time. In this way of competition, in order to prevent high-level players from being eliminated when they meet in the preliminary round, they are divided into different groups, and these players are called "seed players".
Third,
1. Round robin system Every team has to face the same opponent, and an occasional defeat or two will not necessarily lose the qualification to compete for the championship. Therefore, it is generally believed that the round robin system is less accidental than the elimination system and can better reflect the true level of players.
One disadvantage of the round robin is that at the end of the round robin, the competition between teams that have no hope of winning the championship or are worried about relegation is often of little significance. Moreover, in the last few rounds, one side often needs to work hard to win the championship or avoid relegation, and the performance of the opponent in the middle reaches is not very important, which leads to carelessness. A similar situation happened in the group qualifiers, and the team that has already qualified ahead of time may lose the game in order to select the opponents in the next stage. Therefore, although any two teams have to play round robin, it does not mean that the game is completely fair, and the order of the game is also very important.
2.2^(n- 1)<； X< when = 2 n, there are n rounds, and n=(ln x/ln2) (i.e. logarithm with base 2).
The number of fields is [x/2]+[x/4]+...+[x/2 (n-1)] (where [] is an integer).
That is, if there are 10 teams and there is only one champion, then 9 teams will be eliminated, that is, 9 games will be played; As for the number of rounds, you can count backwards. The final round is a two-team competition. In the penultimate round, four teams will eliminate two teams, eight teams will participate in the penultimate round, and 16 teams will participate in the penultimate round, and so on.
3. Competition time, events, players, venues, referees and participants.
Fourth,
1.
64 people didn't. 1-64
Seed 1: 1.
No.2 seed: position 64
No.3 seed: No.48.
No.4 seed: 17.
No.5 seed: No.32.
Seed No.6: No.33.
No 7 seed: No.49.
No.8 seed: 16.
2.
Complete 6-person single cycle platoon method:
The first round 1 and 6 2 and 5 3 and 4.
The second round 1 and 5 6 and 4 2 and 3.
The third round 1 and 4 5 and 3 6 and 2.
The fourth wheel 1 and 3 4 and 2 5 and 6.
The fifth round 1 and 2 3 and 6 4 and 5.
3. In the first game of doubles, the server determines the first server, and then the receiver determines the first receiver. In the following game, after the first server is determined, the first receiver should be the player who served for him in the previous game. In doubles, every time the service is changed, the former server becomes the server, and the partner of the former server becomes the receiver; The player who serves first in one game should accept the service first in the next game. In the final game of doubles, when one side wins 10 first, the receiver will exchange the order of receiving the service; In one game, one player in one direction will switch to another direction in the next game. In the deciding game, one side wins 10, and both sides have to change venues.