The optimal harvesting problem for a semi-linear age-dependent time-varying population system is discussed.
讨论了年龄相关的半线性时变种群系统的最优捕获控制问题。
In this paper, the existence of the optimal harvesting control for a class of non-linear population system is proved.
研究了一类半线性时变种群扩散系统的最优收获问题，证明了最优收获控制的存在性。
This paper discusses the optimal distributed control problem for time-varying population system with spatial diffusion. By J.
讨论了一类时变种群扩散系统的最优分布控制问题，利用J。
At the same time, a more precise model of the population system is given and the corresponding critical fertility rate is obtained.
并给出了人口系统的更为精细的模型，求得了相应的临界生育率。
When the big population system is in stable state. The changing trend of population subsystem of healthy state and that of disease state is discussed.
当人口大系统在稳定状态下，给出了康态人口子系统和病态人口子系统的变化趋势。
The study of population-economy system should start with the population system, and at the same time, every sub-system should be analysed and synthesized.
研究人口——经济系统，首先从人口系统着手，并分别对各子系统进行分析和综合。
This paper introduces the process of data preparing processing of population information system data mining, including the regulation of population system, data clearing, data converting and ect.
本文主要介绍了人口信息系统数据挖掘的数据预处理过程，包括人口系统的属性规约，数据清洗和数据转换等具体过程。
We need to redesign the school system so that it produces a well-educated population.
我们需要重新设计教育体系，使之培育出拥有良好教育的一代人。
Countries that do not have a well-functioning civil registration system only have approximate ideas of the Numbers, the longevity and the health of their population.
那些没有建立完善民事登记系统的国家对其人口的数量、寿命和健康状况，往往只有一些粗略的概念。
So interventions were usually placed within the Chadian health system providing services for both camp refugees and the local population in nearby villages.
因此，为难民营难民和附近村庄的本地人群提供服务的干预措施通常被置于乍得卫生系统之中。
The results are based on the findings of a two-year study of a cross-section of the British population, which examined the effects of ageing on the cardiovascular system.
这些结果来源于一项为期两年的研究。该研究对英国人口进行横断面分析，旨在调查年龄增长对心血管系统产生的影响。
The results are based on the findings of a two-year study of a cross-section of the British population which examined the effects of ageing on the cardiovascular system.
这些结果来源于一项为期两年的研究。该研究对英国人口进行横断面分析，旨在调查年龄增长对心血管系统产生的影响。
Duplicate coding of verbal autopsy results has little advantage over a single-coder system for mortality surveillance or for identifying population patterns of death.
进行死亡率监测或确认人口死亡类型时，死因推断结果的双重编码与单个编码员系统相比优势较小。
Denmark’s success has much to do with theits small size, its homogeneous population and its regulated health care system— on all counts, very different from the United States.
丹麦的成功，很大程度上与它国土面积小、人口种族单一和医疗系统管理较好有关 - 不管是从哪方面讲，都与美国的情况截然不同。
If the image is coupled with the patient's details and location, the system could also help track the spread of a disease through the population, he says.
他还说，如果图像上附带了患者的详细资料及所在位置，系统还能够帮助跟踪出疾病传染的人口范围。
And Canada's fiscal health will soon come under strain from the treasured but expensive public health-care system and an ageing population.
而该国深入人心却又昂贵的公共医疗体系和正趋老龄化的人口将很快给加拿大的财政带来压力。
Mr Webb is also pressing for a national review of the criminal-justice system, an idea that helps him with blacks, who make up a lopsided share of America’s prison population.
韦伯也积极呼吁在全国范围内重新审视刑事司法系统，这有助于他得到黑人群体的支持，因为在美国监狱里服刑的人员中，黑人占了大多数。
Mr Webb is also pressing for a national review of the criminal-justice system, an idea that helps him with blacks, who make up a lopsided share of America's prison population.
韦伯也积极呼吁在全国范围内重新审视刑事司法系统，这有助于他得到黑人群体的支持，因为在美国监狱里服刑的人员中，黑人占了大多数。
Raleigh's problem isn't how to turn around a desperate school system; it's how to build enough schools to keep up with the growing population.
罗利的问题不是如何改变令人绝望的学校系统，而是如何修建足够的学校来跟上不断增长的人口。
The geography of the French court system has not changed in nearly half a century, despite huge population shifts.
尽管法国人口有了巨大的分布变化，但法国司法体系的地理分布几乎半个世纪都没有进行过调整。
As in other countries, a rapidly ageing population in Britain is pushing the care system towards crisis.
和其他很多国家一样，急速增加的老年人口使得英国的社保体系几近崩溃。
For a population who deals mostly in cash, being able to transfer money via a mobile phone payment system presents a huge opportunity to them.
对于一个大部分买卖都通过现金交易的人群，推出手机转账业务转意味着巨大的商机。
In 1991 the education system was reaching a relatively large part of the population, at least at the elementary level.
1991年教育系统普及相当多的人口，至少在初中水平。
Japan has a woefully underfundedretirement system, and it's by no means clear how the population of theworld's most rapidly aging country is going to pay for retirement.
日本不幸背上了一个资金短缺的退休金系统，从而不能厘清到底如何支付这个世界上老龄化速度最快的国家所需的养老金。
This static, ambiguous and nonspecific system creates uncertainty or indifference among the population that it is meant to help protect.
这种静态的、模糊的、非专用性系统使得意欲襄助安全保护的民众产生了不确定性或冷漠情绪。
Depending upon which services are deployed and how heavily the systems are used, such a system could support a relatively large population of registered users.
依据所部署的服务和系统的使用程度，此类系统可以支持相对较大的注册用户群。
Entitlements: Variations in access to different parts of a system and perform varying tasks. Related to user population and transaction behavior as well.
授权：访问系统不同功能的变化，并执行不同的任务，以及相关用户群体和交易行为。
Rates and causes of child mortality were obtained from a continuous-registration demographic surveillance system (DSS) in Malawi for a population of 32 000.
我们从马拉维持续登记的人口监测系统(DSS)中获取了32000人口的儿童死亡率及其原因。
The persistent backing of Mongo's cache assures that on a system restart the downstream data tier is not overwhelmed with cache population activity.
MongoDB缓存可以持续支持的能力保证系统重启下游数据层而不干扰缓存的频繁活动。
Between 1000 and 1300 Europe's urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools).
公元1000年和1300年间，欧洲城市人口翻了一倍多，达到7千万人(与改良工具后人们运行了新式的轮作系统有关)。
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