Model-based dragon ecological analysis
If the dragons in the novel live in our world today,how can we human get along well with the dragons under the premiss of keeping the ecological environment stable? A lot of problems are waiting us to address.In order to analyze dragon characters,behavior,habits and interaction with environment,we build models to discuss their necessary caloric intake,energy expenditures and the most important factors during its healthy growth,these factors impact and influencing results as well.In the end,we measure its growing area through the analysis on the above factors.To calculate the caloric intake and energy expenditures for a dragon,we propose a reasonable assumption that dragons weight grows in line with their age.According to the principle of conservation of energy,we structured a differential equation of first order to describe the process of energy transformation,including energy intake,expenditures,weight,activity intensity,whether got injured and extent of its wound and then establish Model 1: Dragons energy model.This model shows that the necessary energy is a little when the dragon is young,but with the increase of its weight,the caloric intake and energy expenditures will rise sharply.In addition,at the same change of activity intensity,the older the dragon is,the greater variable quantity of energy intake is.Next,we consider all kinds of factor affecting the dragons growing area synthetically.Then we find the weight of weather condition reaches 25%through AHP,taking advantage of which,we screen three the most important elements influencing its growing area: precipitation,food per unit area,and river discharge per unit area.The calculating result of MATLAB presents,their weight arrives at 83.7%.Then we build Model 2: Resource-dependent Growing Area Model(RGA)considering these three factors to measure the supporting area for three dragons.Next,we use Logistic Function to build the relationship between the food per unit area and fresh water resource(precipitation and river discharge per unit area)simplifying the calculation.We find the growing area for three dragons is not stable,and it depends on the dragons body type(the heavier dragons are,the more energy and fresh water resource they need,which leads to larger growing area)and local resources(the less biological and fresh water resources this region has,the larger growing area they need.)Based on the conclusion from AHP: the weather condition has great impact on the dragons growth.We analyze the supporting areas on arid regions,warm temperate regions and arctic regions.We think the rank of areas from large to small is warm temperate regions,arctic regions,arid regions.Some arid regions and arctic regions even arent suitable for the growth of dragon.The dragon needs to live in the places with abundant specious and amply fresh water resource.Meanwhile,it is sensitive to the temperature,vegetation coverage and degree of air thinness that it cant stand living in high altitude areas and the polar region for a long time.Finally,we analyze the performance of our model and the sensitivity of our model,proving that our model is relatively stable for different parameters.
Ecological requirements Dragons energy model AHP Logistic Function RGA Model
Jiamian Wu
North China Electric Power University,Hebei,Baoding,071000
国际会议
太原
英文
630-640
2019-06-29（万方平台首次上网日期，不代表论文的发表时间）