To solve the problem, a fuzzy clustering based on predator prey PSO algorithm is presented, which is using density function to initialize cluster centre.
为解决此问题，提出一种基于捕食-被捕食的粒子群优化模糊聚类算法且聚类中心采用密度函数初始化。
Biologists speculate that the mostly likely cause was a shift in Pacific Ocean currents, but food availability, changing river conditions and predator-prey relationships could be affecting the fish.
生物学家推测，最有可能的成因是太平洋洋流的变化，不过食物的取得、河流环境的改变、生物掠夺关系等，也都可能对鲑鱼造成影响。
This deceptively minimalist predator-prey game triggers some remarkably intense feelings.
这个极其简单的虚拟捕食--被捕食游戏引发了一些显著而强烈的情绪。
A system of retarted functional differential equations as a predator-prey model with stage structure and dispersion is discussed. Conditions for global stability of the system are given.
讨论了一类带有扩散和具有阶段结构与时滞的两种群捕食系统，分析了该系统的非负不变性、边界平衡点性质及全局渐近稳定性。
In this paper, we present and analyze a simple model for a chemostat with predator, prey and periodically pulsed input and washout substrate.
在这篇文章中，我们提出并分析了一个具有捕食者，食饵和既有周期脉冲输入又有周期脉冲输出营养液的恒化器模型。
A recent study has provided clues to predator-prey dynamics in the late Pleistocene era.
一项最近的研究为更新世晚期的捕食者-猎物动力学提供了线索。
This paper discusses the state of Hopf bifurcation in a predator-prey system when parameter varies in some field, and analyzes the stability of the system.
讨论了一类捕食者-食饵系统的参数在某个范围变化时在非零不动点处产生霍普夫分叉的情况，并对其稳定性进行了分析。
The existence of positive solutions of the steady-state system is studied for a kind of predator-prey model under the third boundary conditions.
研究了一类捕食者-食饵模型的平衡态系统在第三边界条件下正解的存在性。
A three-species ratio-dependent predator-prey model with time delays is investigated, conditions are given for persistence of the system.
研究了一类具有时滞的基于比率型三种群捕食者-食饵系统，给出了系统持续生存的条件。
An annular model for chemostat was depicted by a group of ODE(ordinary differential equation) to imitate the ecosystem which included competition and predator-prey relations in nature.
为模拟自然界中既包含竞争关系又包含捕食-被捕食关系的生态系统，建立用常微分方程组表示的环状模型。
Sufficient conditions are obtained for the global existence of a positive periodic solution of periodic neutral delay predator-prey system by using the method of coincidence degree theory.
利用重合度理论建立了一类周期中立型时滞捕食者-食饵系统正周期解的全局存在性的充分条件。
In the second part, a predator-prey model of ordinary differential with one-way diffusion is studied considering the monsoon, river flows, other natural conditions and living habits as background.
第二章以季风、河流流向等自然条件和生物生活习性为背景，建立食饵单向扩散的捕食-被捕食系统的常微分模型。
In chapter 4, the effects of impulses on the persistence and extinction of predator-prey systems are studied thoroughly.
第四章我们建立并系统地分析了脉冲效应对捕食系统持久性和灭绝性的影响。
This paper deals with such a class of predator-prey models that the predator, in addition to the prey considered, has other natural sources of food.
本文研究这样的一类捕食模型：捕食者不但有模型中被捕食者作为食物，而且还有其它固定的自然食物源。
The predator-prey model whose predator's density interference term's coefficient is related with prey is investigated.
研究了一类捕食-食饵模型，其中捕食者的密度干扰项的系数与食饵密度有关。
In this paper, we studied the existence and uniqueness of limit cycle or the predator-prey system (l), and obtained theorems 1, 2, 3.
本文研究捕食—食饵系统(1)极限环的存在唯一性，得到了文中的定理1、2、3。
This paper studied the effect of prey refuges on the stage-structured predator-prey model with two life stages-immature and mature, and with a mature prey using refuges.
构造了一个具有阶段结构的捕食—食饵模型，并研究了庇护所效应对于该系统平衡点的稳定性、平衡密度及其种群长期续存的影响。
We investigate optimal policy for a predator-prey system with age-dependent.
研究一类具有年龄结构的捕食-食饵种群动力系统的最优收获策略。
In this paper, a class of predator-prey systems of three species with discrete time is studied.
本文研究了一类三种群离散型捕食者食饵系统。
In this paper, a class of predator-prey systems of three species with discrete time is studied.
本文研究了一类三种群离散型捕食者食饵系统。
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