Using the comparion theorem of difference equation, persistence theorem of discrete semi-dynamical system and stability of monotonous operator, we gain the boundary, uniform persistence and permanence of the system.
应用差分方程的比较原理 ,离散半动力系统的持久性定理以及单调算子的三分稳定性 ,获得系统的有界性 ,一致持久性 ,永久持久性 。
Using the theorem on discrete semi-dynamicl system and the stability results on monotonous and continuous operator,we obtained the sufficent conditions for uniform boundness,strong and weak persistence and permanence of a discrete system with age-structure subdivided into young and adult population approximately.
应用差分方程的比较原理、离散半动力系统的持久性定理和单调连续算子的三分稳定性获得了一类捕食者具有年龄结构 ,即将捕食者近似地分为幼年和成年种群的离散捕食系统一致有界、弱持久、强持久和永久持久的一组充分条件 。
Permanence and Existence of Periodic Solutions of a Predator-Prey Patchy Model with Dispersal and Time Delay;
对一类在斑块环境下具有Beddington型功能性反应和时滞现象的非自治捕食系统进行了研究,证明系统在适当的条件下是永久持续生存的;利用重合度理论,得到了一组保证该系统存在正周期解的充分条件。
purchase in perpetuity
购买永久持有权年数
a card that identifies the bearer as an alien with permanent resident status in the United States.
证明持有人是具有美国永久居住权的外国人的卡。
Actiones perpetuae
永久诉讼，永久诉权
Having lasting significance or worth; enduring.
历久不衰的，持续的有永久的意义或价值的；持久的
To have a persistent, restless craving.
渴望有持久的、永不停止的渴望
a rule of order permanently in force.
具有永久效力的授权证明书。
PR is considered citizen with 2 exceptions.
永久居民者是有两项权利例外的公民。
The Valuation of Permanent American Options in the Presence of Event Risk;
带有事件风险的永久美式期权的定价
The draft law on real concerns: the possibility of change of land use rights for70 years permanent?
关注物权法草案:70年土地使用权可否变永久性?
not permanent; not lasting.
非永久的，不持久的。
every adult permanent resident will be eligible to vote.
所有成年的永久性居民都有资格投票。
The Pricing of Permanent American Options and Game Options in the Presence of Event Risk;
带有事件风险的永久美式期权和Game期权的定价
This operation will permanently erase all data on the partition
此操作将永久清除分区中的所有数据
when a significant number of people are living permanently in space.
当有相当数量的人永久性地住在太空。
Perpetual American Option Pricing Model in Fractional Jump-diffusion Environment
分数跳-扩散环境下永久美式期权定价模型
a durable peace, friendship, settlement
持久的和平、 永恒的友谊、 永久的解决
I had the power at this moment to shape things in a way that would last.
目前我有权力为事物进行永久性的规划。
(ii) has the right of permanent residence in that other Member, in the case of a Member which:
（ii）在该另一成员中有永久居留权，如该另一成员：
