大致的帮你改了下,你的问题很多.你的介词不会使用,还有定冠词the 再个就是句子表达混乱,尤其是从句没有理解吃透.条件需要多看.
最后,你需要多下语法,多体会,吃透才行的.
Differential equation model is an indispensable part of In mathematical modeling theory.There are the main differential equation model like the famous population growth model,infectious disease model,the economic cycle model and includeing this paper will focus on research of ecological model and so on.
This paper mainly discuss two populations ecological system between predators and baits.Before establishing model,it is assumed that some conditions is convenient to the actual model and according to the existing data and software programming model and analysis separately.When Italian biologist U.D'Ancona study fish variation rules,he found that Mediterranean Sea ports the proportion of carnivorous fish number caught and total amount not only hasn’t been reduced druing at the world one.It has been abvously increased and the proportion of bait amount has been decreased as the war stoped..
Chapter 1 The growth of baits is consistent with Malthus equation without considering artificial predator.when predators exists the quantity for each predator swallow tobait in the unit time is proportional with direct ratio to the bait population scale by discussing the ratio coefficient .
Chapter 2 considering artificial predator,predators and baits will have block situation,the growth rate can’t simply present direct ratio state,so supposing a capture ability coefficient for m,this time predators and baits are consistent with Lotka-Volterra model.
Chapter 3 By predicting the establishment of grey forecasting model and a linear regression model discussed data and bring the reasonable conclusion inspection process to prove that data are consistent with the current trends.
Chapter 4In one word,the article has given the major significance.