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   obtains 在 人口学与计划生育 分类中 的翻译结果: 查询用时:0.775秒
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    Recently, the importance of spatial geo-information for the social scientific field has been paid more and more attention ,it obtains population and economical statistical information which have spatial property ,and makes them ,then gets the directly spatial distributing rule about the population .
    近年来,地理空间信息对社会科学领域的重要性不断得到加强,人口、经济等统计信息所具有的空间特征,通过地理信息系统可以进行空间可视化,从而得到人口在空间中的直观的分布变化规律。
短句来源
    this paper studies the impact of population transition on savings rate by using a overlap generational model in which young and middle aged people perform bring-up obligations to infant and supporting obligations to the elderly,and obtains several new conclusions.
    本文用一个含中青年人对幼年人抚养和对老年人赡养的世代交叠模型分析人口变动对储蓄率的影响,得到了一些新的结论。
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  获得
    First, the manpower capital is the basis which the city new immigrants' society professional status obtains.
    首先,人力资本是城市新移民社会职业地位获得的根本。
短句来源
    The city new immigration question is a brand-new domain about " the immigrants " research in domestic In view of essence, the city new immigration question is "the city adapts" and "the city incorporates" question, but behind these two questions is the city new immigration social network support and the social professional status obtains.
    城市新移民问题是国内“移民”问题研究的一个全新领域。 从本质上看,城市新移民问题就是一个“城市适应”和“城市融入”的问题,而这两个问题的背后就是城市新移民的社会网络支持和社会职业地位获得
短句来源
    This research has mainly discussed the city new immigrants' basic condition, the city new immigrants' social support condition and the city new immigrants' social professional status obtains and so on.
    本研究主要探讨了城市新移民的基本状况、城市新移民的社会支持状况和城市新移民的社会职业地位获得状况等问题。
短句来源
    But the city new immigrants' social professional status obtains also is the key at city new immigrants' "the city adapts" and "the city incorporates ".
    而城市新移民的社会职业地位获得又是城市新移民“城市适应”和“城市融入”的关键所在。
短句来源
    Therefore, this research takes the city new immigrants' social professional status obtains as the key research.
    所以,本研究将城市新移民的社会职业地位获得作为研究重点。
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  得到了
    this paper studies the impact of population transition on savings rate by using a overlap generational model in which young and middle aged people perform bring-up obligations to infant and supporting obligations to the elderly,and obtains several new conclusions.
    本文用一个含中青年人对幼年人抚养和对老年人赡养的世代交叠模型分析人口变动对储蓄率的影响,得到了一些新的结论。
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In the special case whenFn is the projective spaceRPn, one also obtains the upper bound.
      
These are analogous to "fusion rules" in tensor product decomposition and their derivation obtains from an analysis of theR-matrix.
      
This article obtains the nonseparable version of wavelet packets on?d and generalizes the "unstability" result of nonorthogonal wavelet packets in Cohen-Daubechies to higher dimensional cases.
      
As a special case one obtains modulation spaces and Gabor frames on spheres.
      
By using the Smith normal form of polynomial matrix and algebraic methods, this paper discusses the solvability for the linear matrix equation ΣAiXBi=C over a field, and obtains the explicit formulas of general solution or unique solution.
      
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Using differential equbtion model, population growth process in China are imitated. Calculating equation of population growth is obtained by finding the special solution. Concrete instance analyses show that imitating fore cast have better following charaters for practioal obse vation.

应用微分方程模型对我国人口增长过程进行拟和,求取方程的特解,从而获得我国人口增长的计算公式。实列分析表明,模型预测对实际观测有较好的跟踪性能。

A colltrolled age-structured difference equation model of population dynamics based on parity progression is discussed. The distribution of the control strategies which guarantee the population to approach a stable state is obtained, and the attainable set at any time of this system is found. Finally, the maximum principle for an optimal control problem with quadratic index is also obtained.

CRITICALBIRTHORDERRATIOCONTROLANDATTAINABLESETOFADISCRETEAGE-DEPENDENTPARITYPSOGRESSIONPOPULATIONSYSTEMGUOBaozhu(Departmentof...

Over population is a difficult problem facing mankind. The present papersuccessfully establishes a local population pattern by applying the population control theo-ry and population growth equation. With the help of computer, an estimation of thefiftey-eight-year population growth in Changnin County has been carried out. By com-paring the figure obtained from the fourth national census of the county with the projectedpopulation in 1990, an absolute error is found to be only two persons, and the rate...

Over population is a difficult problem facing mankind. The present papersuccessfully establishes a local population pattern by applying the population control theo-ry and population growth equation. With the help of computer, an estimation of thefiftey-eight-year population growth in Changnin County has been carried out. By com-paring the figure obtained from the fourth national census of the county with the projectedpopulation in 1990, an absolute error is found to be only two persons, and the rate of er-ror is less than seven perucent. A scientific projection of the future population can provideastrong basis for the planning of the local economic and social development, the popula-tion program and the policy on population.

人口问题是人类面临的难题本义应用人口控制论及人口发展方程,成功地建立了区域人口模型。通过计算机对昌宁县的人口发展进行58年预测.1990年人口预测值与全国第四次人口普查数相比,绝对误差仅2人,误差率不到百万分之七.科学地预测未来人口状况,能为区域经济和社会发展计划,人口规划和人口政策提供强有力的依据.

 
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