population system meaning in English
群体系统
族群系统
Examples
- From march to december , 2001 , as a part of new multifactorial hypothesis ( nmfh ) research of population system regulation in small mammals , our studies were completed at qingliangfeng national natural conserve , zhejiang province , china
本研究系小型哺乳动物种群系统动态调节新复合因子研究的一部分，于2001年3月? 12月，在浙江省清凉峰国家自然保护区进行。 - We constructed fences using 2 x 2 x 2 factorial design to examine the effect patterns of food availability , predation and interspecific competition on population dynamics and spatial behavior of reed voles , microtusfortis . we expected to test two hypothesises : ( 1 ) availability of high quality food , predation and interspecific competition have independent and addictive effects on population system dynamics for small mammalia herbivore ; ( 2 ) availabiliry of high quality food could reduce home range and aggressive behavior level between individuals of microtine , predation and interspecific competition have independent effects on spatial behavior of microtine
以2 2 2析因实验设计，在野外围栏条件下，探讨食物可利用性、捕食及种间竞争对沼泽田鼠( microtusfortis )种群动态及空间行为的作用，旨在检验下述特定假设： ( 1 )高质量的食物可利用性、捕食及种间竞争对植食性小哺乳动物种群系统动态具有独立的和累加的效应； ( 2 )高质量的食物可利用性可降低田鼠个体间的攻击行为水平，并导致其巢区减小；捕食与种间竞争对田鼠的空间行为亦有独立的作用。 - Firstly , the identification of the double medium system is considered , the existence , the uniqueness and the boundness of the solution of the system of the partial differential equations are proved by using the monotone method , the mathematical model of the parameter identification problem is established , and under some mild assumptions , the optimality system about the identification is derived , thus the suitable gradient methods can be employed to solving the identification problem . secondly , the theories of optimal control of distributed parameter system are introduced to investigate the parameters identification problem involving the three - dimensional population system
利用单调方法证明了正问题解的存在惟一性和有界性，建立了相应参数识别问题的数学模型，并给出了求解这类识别问题的最优化系，从而可利用适当的梯度法，实现对系统参数的识别；把分布参数系统最优控制理论引入到具有多个识别参数的三维种群生态系统的参数识别问题之中，给出了参数识别问题最优解的存在性结论，证明了状态方程的解对识别参数的连续依赖性和g (