查询词典 role model

So two methods are used to remove the local relation. One is that extremal index is introduced to POT model. The analysis showed that the introduction of extremal index improves validity and veracity of VaR based on POT model. Still VaR based on POT model introducing extremal index is invalid in low confidence level. The other is to filter returns series using GARCH model.

为此引入两种方法来消除超阈值的局部相关性：一是将极值指标引入到POT模型中，实证分析发现极值指标的引入不仅改善了POT模型估计VaR的有效性，而且还提高了POT模型估计的准确性，尽管如此在较低的置信水平上即便引入极值指标，POT模型估计VaR仍是无效的；二是用GARCH模型对收益率序列进行过滤处理。

The friction, friction coefficient etc of prescind from external asperity model and the single asperity model in plasticity forming were respectively researched by using finite element analysis software ADINA and Coulomb friction model and nonlocal friction model.

应用大型有限元软件ADINA，采用库仑摩擦模型和非局部摩擦模型，对不考虑表面微凸的模型和单个微凸体模型在塑性成形中的摩擦力、摩擦系数等进行研究。

Some models in this thesis are firstly used for the microcomputer safety analysis code on nuclear reactor systems and are the poineer and advanced works in China, such as the perfect main pump four-quadrant representation model; the reactor power control model; the water level control model of steam generator and pressurizer; the passive emergency core decay heat-removed system model etc..

这里的许多模型，如完善的主泵四象限特性模型、堆功率、蒸汽发生器水位和稳压器水位等的调节模型、非能动余热排出系统模型等都是本文在国内首次应用于微机型核动力系统安全分析程序中的，或是在国内同类研究中处于领先的。

Considering the effect of the stress Lode angle or the third stress invariant, the author presents a new yield function and develops the Ohta-Sekiguchi's elasto-plastic model and Sekiguchi-Ohta's elasto-viscoplastic model to be a true three-dimensional model. This new model can take account of the effects of anisotropy induced by initial anisotropically consolidated state and the rotation of principal stress axes.

在太田-关口弹塑性模型及关口-太田弹粘塑性模型基础上，考虑应力劳台角的影响，提出软土真正三维应力空间的各向异性弹塑性及弹粘塑性本构方程（模型中各向异性主要指初始各向不等压应力状态所诱发的各向异性），这是对太田-关口弹塑性模型及关口-太田弹粘塑性模型的进一步发展。

Firstly the damage probability model of field command post under the enemy′s aviation force formation adopting bombs and precision guided weapon was researched.Then the damage probability model after adopting camouflage and maneuver was discussed.Finally using this model,the variation law of field command post′s damage probability was calculated and the rationality of the model was verified,and the quantitative reference for commander planning camouflage reasonablely with timely maneuver was provided.

对在敌航空兵编队采用普通炸弹轰炸和精确制导武器攻击两种模式下，研究了我野战指挥所被毁伤的概率模型，并探讨了我野战指挥所采取伪装和机动措施后被毁伤概率的模型，最后利用模型分析计算了在采取伪装和机动措施情况下，我野战指挥所被毁伤的概率的变化规律，得到了比较合理、可靠的数据，验证了该模型的合理性，也为指挥员合理规划伪装和适时机动提供了数量依据。

After compairing the characters of logit model and probit model, this paper chooses logit model as the parking choice model.

接着在分析了logit模型和probit模型的优缺点后，决定选用logit模型作为停车场选择模型。

This modeling method is discussed from three aspects as follows. Firstly, on enterprise model framework, enterprise model expressed by this modeling method is more particular than other, since there are the views of product process and relation in it. Secondly, in this modeling method, the modeling process that the process model of products is created first of all and other models are created according as it is presented. Using this method, enterprise model is clear and consistent. Thirdly, on the representation of views, the traditional method of IDEF is appreciably improved.

论文从三个方面对此建模方法进行了阐述：1，企业模型框架方面，基于产品过程模型的集成化企业建模方法中的模型框架包含了产品过程视图和联系视图，因而它表达的企业模型更为丰富、详细；2，企业建模过程方面，提出了首先建立企业产品过程模型、再以此为核心建立其它模型的建模过程，这样建立的企业模型主次分明，各视图之间有机统一、协调一致：3，模型视图的描述方法方面，对传统的IDEFIntegrated Computer—Aided Manufacturing(ICAM DEFinition模型表达方法提出了一些改进建议。

Besides expressing design result, it provides domain constraint for design process and model information for digital assembly sequence planning and simulation of stamping die, which is usually ignored in the former product models. Taking the specific structure and design process of stamping die into account, the information of workpiece is composed in die product model as product feature. Former product models merely contain mainly about the die design result, this model extends the contents of product model with the relation feature of the composed subassembly and parts and also other associated production knowledge. It is convenient for getting the associated information during intelligentized design process.

该模型不但能完整地表达冲模的设计结果，同时还表达和存储了冲模设计的知识信息，能较好地为冲模的设计过程提供规则和约束，支持产品的智能设计过程以及冲模的数字化预装配规划和仿真；而模型中冲压件信息的集成则扩大了冲模产品模型的信息内涵和应用外延，便于建立冲模智能设计过程的信息关联，从而使集成信息模型成为产品设计过程上、下游活动实现信息共享的基础。

On the basis of above research works, a finite element model for column of the TH6350 high speed numerical control boring was built; the stiffness of the slide guide interface between the bed and column bottom and the constrain stiffness from lead screw were estimated by using experimental formula, to guarantee the rationality of the boundary condition of the FEM model; the week link of the column has been found by application of ANSYS software to FEM model analysis of the column, The result shows that the calculation data and test data are very consistent, therefore proved the properness of the FEM model.

在上述工作基础上，本文对TH6350高速数控镗床的立柱进行了有限元建模；并利用经验公式估算了立柱与床身之间的导轨结合面上的刚度和丝杠副约束刚度，保证了有限元模型的边界条件的合理性；应用ANSYS软件进行有限元模态分析找到了立柱结构的薄弱环节，通过分析对比表明有限元分析计算与现场测试的结果相一致，证明了有限元模型的正确性，为立柱结构的进一步改进设计和优化提供了重要参考依据。

The model of the received power is established based on the basic principles of geometry optics and radiometry. This model provides the principle of receiver-transmitter design and performance evaluation. On the basis of the received power model and APD noise model, the response of measurement signal after passed through the frequency difference circuit and the corresponding change of its SNR are studied.

研究了非合作目标测距时，发射视场与接收视场的重叠情况，以及视场重叠区域内光的探测情况，并以此为基础，根据几何光学和光度学的基本理论，建立了非合作目标测距中接收光功率的数学模型，为接收/发射器的结构设计，以及测距性能的预测提供了理论依据。

Connectors are lines that can be anchored to particular places, called glue points , on the graphic object.

连接符，可固定在图形对象的特定的地方的线条。

Another way of putting it, too many agents have a say in each other's work, and bureaucratic rigor mortis sets in.

另一种表达是，太多的作用物在彼此的工作里都有话语权，官僚的僵尸开始抬头。