What does CV mean?

CV means:

1. The abbreviation of aircraft carrier is a large surface combat ship with carrier-based aircraft as its main weapon and as its base for maritime activities. It is the largest naval surface combat ship. Ship type. It is mainly used to attack surface ships, submarines and transport ships, attack coastal facilities and land strategic targets, seize air and sea supremacy in combat sea areas, and support landing and anti-landing operations.

2. The abbreviation of cost deviation refers to the difference between the budgeted cost of an activity and the actual cost of the activity. In earned value, cost deviation (CV) = earned value (EV) - Actual Cost (AC).

3. Coefficient of Variation (Coefficient of Variation). When you need to compare the degree of dispersion of two sets of data, if the measurement scales of the two sets of data are too different, or the data dimensions are different, use the standard directly. It is not appropriate to compare the difference. The coefficient of variation can eliminate the influence of measurement scale and dimension. It is the ratio of the standard deviation of the original data to the mean of the original data.

4. Commercial Vehicle (Commercial Vehicle) is a vehicle used to transport people and goods in terms of design and technical characteristics. Commercial vehicles include all cargo trucks and passenger cars with more than 9 seats, divided into five categories: passenger cars, trucks, semi-trailer tractors, incomplete passenger vehicles and incomplete trucks.

5. The abbreviation of computer vision is a science that studies how to make machines "see". Furthermore, it refers to the use of cameras and computers instead of human eyes to identify, track and measure targets. Wait for machine vision, and further perform graphics processing to make computer processing into an image more suitable for human eye observation or transmitted to instrument detection.

Extended information:

The coefficient of variation is only defined when the mean is not zero. When comparing the degree of variation of two or more data, if the unit of measurement is the same as the mean, the standard deviation can be directly used for comparison. If the units and/or averages are different, the standard deviation cannot be used to compare the degree of variation, but the ratio (relative value) of the standard deviation to the average must be used for comparison.

The size of the coefficient of variation is affected by both the mean and the standard deviation. Therefore, when using the coefficient of variation to express the degree of variation of the data, it is best to list the mean and standard deviation.