1, personal days = total number of breakfast meals x breakfast meal ratio+total number of lunch meals x lunch meal ratio+total number of dinner meals x dinner meal ratio.
2. Standard person-days = standard person coefficient x person-days. ?
Man-days are the sum of the number of people and days. This is very common in engineering. How many people, the total number of unemployed days is the number of people, that is, the sum of the number of unemployed days of everyone, not the product of the number of people and the number of days-unless everyone's unemployment days are the same.
The number of working days of training is the sum of the number of people who participate in training every day, which is different from that in engineering, but the method is the same. This is because the engineering workers are fixed, so the sum of the number of days each person goes out to work, while the number of training days is fixed, and the number of people attending training every day is inconsistent, so it is the sum of the number of daily parameters. In fact, they are all indicators!
The number of person-days is the number of days that respondents eat. 1 person eats breakfast, lunch and dinner one day. The total number of person-days during the investigation period is equal to the sum of the days of each person during the investigation period. Because the age, sex and labor intensity of the respondents are very different, it is impossible to compare with the average intake of nutrients.
Therefore, all the people are generally converted into standard people for comparison. A standard person refers to an adult male who weighs 60kg and is engaged in light manual labor. The conversion method is to take the standard person's energy supply 10.03MJ(2400 kcal) as 1, and others can get the conversion coefficient of all kinds of people according to the ratio of their recommended energy to 10.03 MJ. ..