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- fish population model 鱼口模型
- Some open problems for Bob , hite Quail population model presented by G. 据此解决了一个关于差分方程周期性的公开问题；
- There is already evidence that such fish population changes have occurred since the mid-1960s. 已经有证据证明,自从六十年代中期,这种鱼群已有变化。
- Catching more fish only erodes the restoration capacity of the fish population even more. 捕获更多的鱼只会进一步侵蚀鱼类的恢复能力。
- The final population model related clearance with day-dose/BSA (DBSA) and smoke habit (SMOK). 建模中单室一级吸收和消除模型能够较好地拟合数据。
- Researchers believe the guppies are using sex as a way of suppressing the native fish population. 研究人员相信虹鳉将性攻击作为抑制本地鱼数量的一种方式。
- The dam further imperils delicate fish populations in the Yangtze. 大坝更加威胁到长江中脆弱的鱼的族群。
- Normal Distribution -- A population model that has symmetrical sides and one single peak and fits a particular mathematical model. 正态分布 -- 一种数据分布，其特点是两边对称，只有一个峰值且满足特定的数学模型。
- On the fish population, the only severe punishment imposed for all kinds of outrages, which are valuable of the feudal rulers. 对鱼肉百姓，胡作非为之徒严惩不怠，这些都是封建统治者难能可贵之处。
- Shunshen ting was taken afterxian ya , mighty indomitable, castigatedkong qing 荃magistrate is corrupt officials, pocketed fish population. 申庭顺被带到县衙后，威武不屈，痛骂知县孔庆荃是贪官污吏，中饱私囊，鱼肉百姓。
- That change in chemistry has led to staggering alterations in the lake's ecology, causing precipitous drops in the Aral Sea’s fish population. 化学成分的改变极大地改变了湖区的生态环境，导致咸海鱼类数量剧减。
- Fish populations assume highly localized distributions within each river. 鱼群分布集中在每条河的某些区域。
- By aid of the monotone iteration technique and the upper and lower solutions method, the existence of travelling wave fronts is established for a single species population model with stage structure and distributed maturation delay. 利用单调迭代和上下解方法证明了一类具有分布成熟时间和阶段结构的单物种种群模型的波前解的存在性.
- By using the variation assimilation method and the optimal control method, theoretical analyses of the maximum population capacity and the inherent growth rate for the population model is presented. 摘要研究人口的阻滞增长模型，采用资料变分同化方法及最优控制的技巧，从理论上对模型中的最大人口容量和固有增长率进行最优确定。
- Fish were surfacing to catch insects. 鱼浮到水面上捕捉昆虫。
- The researchers say damage to oceans affects not only fish populations but also the productivity of ecosystems. 研究人员认为对海洋的破坏，不仅影响鱼类数量，还影响生态系统的生产力。
- Clearly, the decline in fish populations in Tria's waters is the result of overfishing, not pollution. 显然，Tria水域鱼类数量的下降是过度捕鱼而不是污染造成的。
- Currently many fish populations in Tria's waters are declining, a situation blamed on pollution. 当前Tria水域的很多种鱼类数量都在下降，这种现象被认为是污染造成的。
- Dynamics of Population Model with Limited Supply 具有有限食物从给的种群模型的动力学性质
- A census GIS,which named as Pudong New Area Census GIS(PucGIS),was(developed) using techniques of component GIS,data ware house,demographic and population modelling. 以第五次人口普查数据为基础;综合利用gis构件技术、数据仓库技术和模型集成技术建立了浦东新区人口普查gis(简称Pucgis).
