确定性模型

• Through importing the probability to model the uncertain factors of actual issues , the certainty model is transferred to uncertainty model , which could more accurately response to the reality , and make economic index as evaluation standard
  通过引入概率模拟实际问题中的不确定因素，将确定性模型转化为不确定性模型，以使模型能更准确的反映实际，并将经济学指标作为评价标准。
• The result indicates that a share initial public offerings underpricing could be explained by the uncertainty model . furthermore , the approval system and other system alterations have reduced the initial public offerings underpricing
  研究结果表明，近期中国a股首次公开发行价格低估现象能较好地用不确定性模型进行解释，此外，核准制的实施等制度变更降低了新股发行价格低估程度。
• In this thesis , firstly we introduce the recent studies on traffic flow , which based on the statistical physics , secondly the fundamental principles and characteristics of one - dimension ( 1d ) determined ca model ( dca ) and two - dimension determined ca model ( bml ) are described in detail
  本文首先综述了近期来物理学界在统计物理的基础上对交通流的研究发展情况，然后详细介绍了作为各类模型研究基础的一维确定性模型dca和二维确定性模型bml的基本原理和特性。
• Therefore , this thesis mainly researches that how to set up the uncertainty model of fuzzy area and how to analyze the topological relation about fuzzy areas , based on the vector gis and using some knowledge including fuzzy mathematics and measure adjustment and so on
  因此，本论文基于矢量gis ，利用模糊数学、测量平差等知识，主要研究了如何建立模糊地理区域的位置和属性不确定性模型以及在建立地理信息不确定性模型后如何进行和模糊地理区域相关的空间拓扑关系分析。
• In this paper , landscape ecology theory , uncertainty models and long time series are used in tourism planning market research and function distributing . the research of tourism surrounding carry capacity takes tourism amount as the index , the nature environment carry capacity takes tourism environment carry capacity exponent as the index , and the dynamic research takes tourism income as the index
  本论文结合景观生态学理论、不确定性模型与方法和时间序列研究方法,将旅游环境承载力与旅游规划的市场研究、功能分区相结合,分别作了以游客量为代表的游览环境承载力研究、以旅游环境承载力指数为代表的自然环境承载力研究以及以旅游收入代表的游览环境承载力的动态性研究。
• However , there are also large numbers of fuzzy areas without specific boundaries in the real world . these areas " boundaries are normally difficult to locate , and their uncertainties are difficult to control because their uncertainties come from many facets . but these areas are very important in the analyzing of gis , so it is essential to research the uncertainties of fuzzy areas and make the sound models
  然而现实世界中也存在大量的无明确空间范围的模糊地理区域，这类区域的边界往往难以测定，其不确定性也因为源自很多方面而难以控制，但是这类区域在gis分析中却也是相当重要的，所以必须研究模糊地理区域的不确定性并给出合理的位置和属性不确定性模型。
• This study reveals the relationship between this factors , and shows which we should pay more attention to in design and maintenance of indoor environment . in order to give expression to the indeterminacy , we introduce grey structure , grey parameter and grey variable into the determinate indoor air quality models . the grey models are important tools to forecast , evaluate and control indoor contamination level , because they not only make best of the existing knowledge , but also correctly take the grey characteristics into consideration
  为反映室内空气品质实际状态，我们将传统确定性模型的模型参数或系统输入进行灰化处理，引入灰结构、灰参数及灰变量，得到相应的既充分利用了人们对室内空气品质系统发展变化规律的现有认识，又对系统存在的“灰性”进行了恰当处理的室内空气品质灰色模型，为室内空气品质的评价、预测、控制和室内环境的改善提供了依据。
• This thesis first puts forward the sound mathematic model and spatial expression , and then sets up the position uncertainty model of fuzzy area using the method of setting up the position uncertainty model of specific area . moreover , this thesis researches how to set up the attribute uncertainty model of fuzzy area . after setting up the position and attribute uncertainty model of fuzzy area , this thesis researches how to analyze the topological relation about fuzzy area
  本论文首先对模糊地理区域建立合理的数学模型和空间表达，然后拓展建立确定性地理区域的位置不确定性模型的方法建立模糊地理区域的位置不确定性模型，接着本论文讨论了如何建立模糊地理区域的属性不确定性模型，在建立了模糊地理区域的位置和属性不确定性模型的基础上本论文讨论了如何进行和模糊地理区域相关的空间拓扑关系分析，最后本论文给出了建立模糊地理区域的位置和属性不确定性模型的实际算例。
• In the end i conjugate the inside observation and the external observation of dam , do the homological research to the inside observation and the external observation of dam . the main contents that this paper can be concluded as : 1 . to research finite element calculation mode for complicated problem in the mechanics
  本文研究的主要内容可归纳为： 1 、研究将有限元法作为求解力学中的复杂问题的数值解法的计算模式； 2 、基于有限元混凝土坝位移确定性模型的建立； 3 、确定性模型在三门峡大坝形变分析中验证； 4 、大坝的内、外部观测新技术应用及响应性研究思路。
• The main work and achievements are summarized as follows : according to the spectrum analysis theory , the simple formula of the power spectrum between the excitation and the response is obtained . then the time - domain statistical properties of the structural response are acquired through fourier inverse transform , and cauchy ' s residue theorem is applied to solving the integral of fourier inverse transform , the structural dynamic reliability is calculated in terms of possion hypothesis based on first passage failure
  主要研究内容如下：从谱分析理论出发，得到了激励与响应功率谱之间的简明关系式，由fourier逆变换得到响应的时域特征，利用cauchy留数理论处理fourier逆变换的积分式，基于首超破坏的possion假设计算结构系统的动力可靠性，并在此基础上进行结构优化设计，奠定了确定性模型的基础。