查询词典 model theory

The research shows that the method excellently resolves the technique problems in model description, reasoning and simulation with the model, and the process of control system analysis and design, which gives the important impetus on intelligent modeling and control theory on uncertain systems characterized by lucking quantitative description tools.

研究结果表明这种方法在模型表示、模型推理与仿真、控制系统分析设计过程均很好地解决了技术难题，对难定量描述的不确定性系统智能建模与控制理论研究具有重要的推动作用。

We presented a kind of expanding model of Rough Sets, that is the model of Rough Sets with the grade of membership and weight, after lucubrating the deficiencies of the theory of traditional Rough Sets.

在深入研究经典粗糙集理论的一些不足后，我们提出了一种粗糙集的拓广模型，即带隶属度及权重的粗糙集模型。

The theory model of information equipments allocation that takes demands as direction is set up based on summarized different characteristics of these two kinds of information resources. The relevant contents about how to select the type of information equipments are explained. The quality model of the enterprise's information personnel is established based on redistricted the duties of enterprise's positions. On this basis, this dissertation proposed some suggestions on information equipments and information personnel's management.

本文将企业支持性信息资源划分为信息设备和信息人员两大类，根据这两类信息资源的不同特点分别对其相关理论进行了总结凝练，建立了以需求为导向的信息设备配置理论模型，阐述了关于信息设备选型的相关内容，重新划分企业的职类职位、构建出企业信息人员的素质模型，为合理配置信息设备和信息人员提供了理论依据和实现方法。

At first, I developed the principle and restrictive factor to optimize the investment structure of regional industry; Secondly, I applied the Grey Theory to research the relationship between structure of investment and structure of industry, the relationship between structure of industry and economy of region.; Thirdly, Three methods, including AHP, Principal Component Analysis and Relative Potential were exerted to research the order of investment afterward, I developed qualitative analysis to the third industry, and put forward suggest to its progress direction; Fourthly, Using economics and operational researchs thoughtway for reference, I upbuilt the dynamic model of investment portion model.

首先，提出了优化区域产业投资结构的原则和制约因素；其次，运用灰色系统理论对区域的产业结构与整体经济、投资结构与产业结构的关系进行论证分析；第三，建立了区域产业投资结构评价指标体系，并运用AHP法、主成份分析法和相对势法对河北省第一、第二产业投资排序进行了研究，然后，在充分利用现有数据的前提下对第三产业进行了定性的分析，并对第三产业的发展方向提出了建议；第四，借鉴了经济学、管理学、运筹学等一些理论的思想方法，建立了区域产业连续投资分配比例模型；最后，根据河北省情，结合中国进入WTO的过渡期市场环境，提出了一些政策建议，以达到实现河北省产业投资结构优化的目的。

This paper makes the fitting analysis of the field test data according to the hyperbolic model established by the interface spring theory,and simulates the experiment of bolt upraising by means of the finite element method.After the comparison of the calculated results with the field test results,the paper draws the main conclusion that good fitting effect can be obtained when the hyperbolic model is adopted in fitting the relationship between axial force and depth.The interfacial shearing stiffness will so...

文章按照界面弹簧理论所建立的双曲线模型，对试验实测数据进行了拟合分析，并采用有限元法对锚杆上拔试验进行了模拟，对比计算结果和实测结果得出的主要结论为：采用双曲线模型拟合锚固轴力随深度变化的曲线，可以取得良好的拟合效果；在逐级加载的条件下，界面的剪切刚度呈软化的趋势；在锚固界面没有发生较大滑移的情况下，计算位移和实测位移比较接近。

In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.

本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程，选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形，利用Unigraphics软件的建模功能，绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次，描述了应用有限单元法进行实体接触与碰撞问题算法的公式，研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后，通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包，将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件，给出一种新的加载方法，进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。

On the basis of consulting a large number of materials, this paper's research of PPP model is as follows:At first, this paper studied the definition ,of the PPP model, explores its theory background, birth background, and its application abroad.

在查阅大量文献的基础上，本文对于PPP模式的研究主要体现在以下几个方面：本文首先对基础设施PPP模式的定义做了比较研究，探讨了PPP模式的理论背景，产生的背景以及在国外的应用。

Based on the characteristics of casing annulus gas-venting wells, the particularity of multi-phase flow in the condition that the casing-head gas flows through a nearly stagnant liquid was investigated. Based on the theory of Taylor bubble, a model to calculate void fraction and pressure gradient in various viscosity liquids was developed. This model is applicable to bubbly flow and slug flow.

以泰勒气泡在黏滞流体中的上升流速作为主要依据，建立了不同油黏度下套管环空放气流动的截面含气率和压降计算模型，并提出了不同黏度、不同气油比的套管定压放气井环空流动计算及套管压力分布的多相流模型，该模型主要适用于泡流和段塞流。

In this paper, borrowing ideas from the research method of the spontaneous combustion mathematical model of goaf, applying to the hydrodynamic theory of porous medium, the spontaneous combustion mathematical model of coal gangue dump is set up.

本文借鉴了采空区自然发火数学模型的研究方法，以多孔介质流体动力学理论为指导，建立了煤矸石山自然发火数学模型，从数学上描述了矸石山自燃的动态演变过程，为自燃矸石山的防治措施提供了理论依据。

In this paper, borrowing ideas from the research method of the spontaneous combustion mathematical model of goaf, applying to the hydrodynamic theory of porous medium, the spontaneous combustion mathematical model of coal gangue dump is set up. From the mathematics, the dynamic evolvement process is described for the spontaneous combustion of coal gangue dump.

本文借鉴了采空区自然发火数学模型的研究方法，以多孔介质流体动力学理论为指导，建立了煤矸石山自然发火数学模型，从数学上描述了矸石山自燃的动态演变过程，为自燃矸石山的防治措施提供了理论依据。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。