Therefore, a feature-based solution for topological entity naming was proposed. Firstly, uniform naming method for feature face was established and its name remained invariable during the modeling procedure. Secondly, the expression between topological entity and feature face was established and topological entity expressed by feature face was referred to during the course of feature's parametric definition, and as a result, the problem of persistent naming topological entity for feature-based collaborative CAD was solved. Thirdly, the concept of reference face was proposed and utilized to solve ambiguous referring problem, which arose from topological face splitting, topological edge splitting and multiply intersection edges.
提出了基于特征的解决方案：为特征面建立统一的命名方法，并规定在建模过程中特征面的名字不变；建立拓扑实体与特征面之间的表达关系，在特征参数化定义过程中引用由特征面表达的拓扑面，解决基于特征的协同CAD中拓扑实体永久命名问题；给出提出参考面的概念，用于解决拓扑面、拓扑边分裂和多重交线等问题引起的引用模糊问题。
In this paper, in view of the problem of how to decrease butane consumption in course of aromatics extraction, solution of optimizing operating parametric is presented.
本文针对如何降低芳烃抽提过程中的丁烷消耗问题，提出优化过程操作参数的解决方法。
In chapter 5, face to cyclic problem in relating-graph parametric design, a new approach to direct and solve constraint graph is presented, which is deformation mapping based two dimensions geometric graph oriented.
在第五章中，针对包括关联图形在内的参数化中遇到的循环约束问题，提出了一个基于变形映射的约束图有向化与求解新方法。
The solvability and diagnosability problem of parametric value for network elements is studied in this paper.
本文研究了网络元件参数值的可解性与可诊断性问题。
This article that focuses on the systematic and in-depth research in the current primal problem about abnormal burst pressure reservoir depress burst pressure has procured following main fruits:1 It forms the method which could obtain massive vertical static state mechanics parameters.2 In a foundation of acquisition of rock mechanics parameters, apply bent lamella that as mechanical model along with characteristic of actual geologic characteristics to analysis curvature for anticlinal strcture, get homologous tectonic stress value throug relation between the curvature and stress and different principal curvature in anticlinal structure, consequently set up laminational stress model for anticline reservoir. The block lamination for existed fracturing date has formed method of setting up mechanical model of lamination terrestrial stress by abtaining the block tectonic stress coefficients which are got by complex utilization test, laboratory test and fracturing date playback.3 Analysesing the main reason which lead to high burst pressure by considering the characteristic of reservoir geology, reservoir, and rock mechanics and reservoir damage, etc. Establishing burst pressure quantitative prediction model which provide gist for depressing construction risk and optimizing construction craft under the condition of open hole completion, gun-perforated completion and damaged reservoir.4 Provding theoretical basis for interpreting acidification pretreatment which could depress busrt pressure by finding the relation between the influencing factors and rock machanics parameters and analysing the factors that have effect on rock mechanics parameters. Expounding the mechanism of reaction of mixed monomineral and acid from the angle of microcosmic element, evaluating quantitatively acid sensilility of different kinds of mineral effectively, and determing the first-order reaction dynamical equation of each mineral.5 Revealing rock mechanics property chage as a result of acid flooding in different condition by sandstone traumata experiment in different temperatures which combined with rock mechanics triaxial stress experiment.6 Associating damage mechanics with sandstone acidizing, established sandstone damage mechanics model in the foundation of the recognition on the rock mechanics parametric variation which is caused by acid-rock reaction in both macroscopic view and microscopic view, also demonstrated those processes and quantitative estimated the acid busrt pressure to direct the site operation.
本文针对目前异常破裂压力储层降低破裂压力的主要问题展开较为系统和深入的研究，取得了以下主要成果：1形成了利用测井资料，结合室内岩芯测试结果，获取静动岩石力学参数的相关性特征，从而获得纵向上大量静态力学参数的方法。2在获取了岩石力学参数的此基础上，利用弯曲薄板作为力学模型，结合区块实际地质特征对背斜构造进行曲率分析，通过曲率与应力的关系，利用背斜构造不同部位的主曲率求得相应的构造应力值，从而建立起背斜储层的分层应力模型；对已有压裂资料的区块分层，形成了综合利用测试、室内实验、压裂资料反演获得该区块构造应力系数，建立起分层地应力的力学模型的方法。3综合考虑储层地质、油藏、岩石力学特性和储层伤害等因素，分析造成高破裂压力的主要原因，综合利用岩石力学、弹性力学等知识，建立了裸眼完井、射孔完井条件下以及储层受到伤害后的储层破裂压力定量预测模型，为降低施工风险和优化施工工艺提供了依据。4完成了物性、岩性影响岩石力学参数的因素分析，找出了各影响因素和岩石力学参数之间的关系，为从机理上解释酸化预处理降低破裂压力提供了理论基础；从微观元素的角度阐述了单矿物与酸反应的机理；并在此基础上，有效评价了各种矿物的酸敏感性，定量确定了岩石中各矿物的一级反应动力学方程。5完成了不同温度下的酸液类型、酸液浓度、注酸量等一系列砂岩损伤实验，结合岩石力学三轴应力实验，系统揭示了在不同条件下注酸而引起的岩石力学性质变化。6将损伤力学与砂岩酸化相结合，在宏观、微观两个方面认识酸岩反应引起岩石力学参数变化基础上，建立了砂岩损伤力学模型，并对其进行验证，在此基础上定量计算酸化后的破裂压力，有效指导现场施工
Whose content is pursued including using the AutoCAD software to draw out a part, is pursue the parametric choice carrying out analysis, blank choice, electricity to the part, the machine tool choice workpiece dress gripping and rectifying CAXA line cutting programming, the part treating and so on, reaches the scheme knowing well that a part processes process from blank to finished product's, and processes the problem should pay attention to in process and solving thereby
本次毕业设计的内容是电火花线切割样件加工，主要是对零件凹角和尖角进行电火花线切割加工，其内容包括使用AutoCAD软件绘制出零件图、对零件图进行分析、毛坯的选择、电参数的选择、电极丝的选择、机床的选择、工件的选择、工件的安装及校正、CAXA线切割编程、零件的加工等，从而达到熟悉一个零件从毛坯到成品的加工过程，以及在加工过程中应注意的问题及解决方案。
Whose content is pursuedincluding using the AutoCAD software to draw out a part, is pursuethe parametric choice carrying out analysis, blank choice, electricity to the part, the machine tool choice workpiece dressgripping and rectifying CAXA line cutting programming, the parttreating and so on, reaches the scheme knowing well that a partprocesses process from blank to finished product's, and processesthe problem should pay attention to in process and solvingthereby
摘要本次毕业设计的内容是电火花线切割样件加工，主要是对零件凹角和尖角进行电火花线切割加工，其内容包括使用AutoCAD软件绘制出零件图、对零件图进行分析、毛坯的选择、电参数的选择、电极丝的选择、机床的选择、工件的选择、工件的安装及校正、CAXA线切割编程、零件的加工等，从而达到熟悉一个零件从毛坯到成品的加工过程，以及在加工过程中应注意的问题及解决方案。
Computing the intersection of parametric and algebraic curves and surfaces is a fundamental problem in computer graphics and geometric modeling.
刘德平 ，李晶晶，李睿在计算机图形学和几何造型中，参数曲线曲面或代数曲线曲面求交是一基本问题。
Simultaneously, we study the existence problem of a special Weingarten rotation surface s in H_1~3(-1) and give all spacelike and timelike Weingarten rotation surface sin H_1~3(-1) using the parametric representation of rotation surfaces.
同时研究了H_1~3(-1)中一类特殊的Weingarten 旋转曲面的存在性问题，并利用曲面的参数表示，给出了H_1~3(-1)中所有的类空和类时Weingarten 旋转曲面的表示。
By the parametric potential energy variational principle, the analytic solution of expansion problem of granular material pile is obtained.
利用参变量最小势能原理，求出了散体材料桩扩张问题的解析解。
Equation, a parametric method to solve this design problem is proposed.
矩阵方程的解，提出了二阶动力学系统的全维比例微分观测器设计参数化方法。
Based on an eigenstructure assignment result for descriptor linear systems via output feedback and a sensitivity result of generalized eigenvalues of matrix pairs, the problem of robust eigenstructure assignment via output feedback in descriptor linear systems is considered. General parametric expressions of the closed-loop eigenvalues sensitivities to the perturbed elements in the open-loop system matrices are obtained, and a simple effective algorithm for robust pole assignment via output feedback in descriptor linear systems is then proposed.
四、基于广义线性系统输出反馈特征结构配置结果和矩阵对广义特征值灵敏度结果，研究了广义线性系统输出反馈鲁棒极点配置问题，给出了闭环极点关于开环系统矩阵中摄动元素的灵敏度的参数表示，并在此基础上给出了广义线性系统输出反馈鲁棒极点配置问题的一个简单、有效的算法。
Based on a general parametric eigenstructure assignment result proposed for descriptor linear systems via proportional plus partial derivative state feedback and a result for generalized eigenvalue sensitivity problem of matrix pairs, parametric representation of the closed-loop eigenvalue sensitivities to the perturbed elements in the open-loop system matrices is obtained. An effective algorithm for eigenvalue assignment with minimum sensitivity in descriptor linear systems via proportional plus partial derivative state feedback is then proposed.
摘要基于广义线性系统比例与部分状态导数反馈参数化特征结构配置结果和矩阵对广义特征值灵敏度结果，得到了关于开环系统矩阵中摄动元素的闭环特征值灵敏度的参数表达式，并在此基础上提出了广义线性系统比例与部分状态导数反馈最小灵敏度特征值配置的有效算法。
Based on an eigenstructure assignment result for descriptor linear systems via proportional plus partial derivative state feedback and a sensitivity result of generalized eigenvalues of matrix pairs, the problem of robust eigenstructure assignment via proportional plus partial derivative state feedback in descriptor linear systems is solved. General parametric expressions of the closed-loop eigenvalues sensitivities to the perturbed elements in the open-loop system matrices are obtained, and a simple effective algorithm for robust pole assignment via proportional plus partial derivative state feedback in descriptor linear systems is then proposed.
五、基于广义线性系统比例与部分状态导数反馈特征结构配置结果及矩阵对广义特征值灵敏度结果，研究了广义线性系统比例与部分状态导数反馈鲁棒极点配置问题，建立了闭环极点关于开环矩阵中受扰元素灵敏度的参数表达式，并在此基础上给出了广义线性系统比例与部分状态导数反馈鲁棒极点配置问题的一个简单、有效的算法。
The following topics are researched in details, such as detection and extraction of moving objects, especially the problem of moving objects detection in dynamic scene, carries out the moving objects detection algorithm based on adaptive background model. We also present a background modeling algorithm based on Non-parametric Kernel Density Estimation. This algorithm consider the dependence both in temporal and space domain, and modeling both the background and foreground, when the traditional algorithms always only model the background just using the temporal dependence. Besides, the presented algorithm utilizes the non-parametric model to estimate the density function, overcome the problem that the single or multiple gaussian model cant approach the density function adequately.
重点研究了复杂背景下运动目标的检测与提取，特别是动态场景中的运动目标的检测问题，实现了基于自适应背景模型的运动检测算法，并在此基础上提出了一种基于非参数核密度函数估计的背景建模算法，该算法在考虑了传统运动目标检测算法中像素灰度值的时域相关性的同时，还充分考虑了同一帧图像中个像素点灰度值的空间相关性，并且在不仅对背景建模而且对前景同样建模，另外利用非参数模型估计密度函数，克服了单高斯和混合高斯不能充分拟合密度函数的缺点，得到能充分反应实际背景且光滑的模型。
In this paper, three-dimensional elastic-plastic contact problem of the wheel/rail system is solved using the finite element parametric qua...
提出用轮轨接触的轮周位移计算蠕滑率的新方法，并对在各种参数下所得到的蠕滑率进行了分析比较。
In Chapter 5, the problem of observer-based parametric fault detection system is studied.
第五章把基于观测器的H_∞故障检测技术推广应用于解决受L_2范数有界未知输入影响的线性时不变系统的参数故障检测问题。
The core of this chapter is to first describe the faults occurred in system actuators, sensors and components in a form of additive parameter deviations, then to transform the parametric fault detection problem into a similar additive fault setup, based on which an observer-based H_∞optimization approach to parametric fault detection is proposed. The definition of parametric fault detectability is also introduced.
对于传感器、执行器和元器件故障表现为参数摄动形式的情况，将参数故障检测问题描述为加性故障的检测问题，给出了参数故障的可检测性概念，提出了针对参数故障的基于观测器的故障检测系统设计H_∞优化方法。
Finally, in view of the production stage problem of repeat drawing engineering drawings, this thesis has developed an engineering drawings parametric design module of automobile welding fixture part.
最后，针对焊装夹具投产阶段大量重复绘制工程图的问题，本文开发了汽车焊装夹具元件工程图参数化设计模块。
Secondly, the predict methods of armament cost are induced. Thirdly, the estimating methods and models used in the Fourth Academy are mainly discussed, and Parametric Cost Estimating is determined to solve the problem in future.
接着着重对四院目前使用的估算方法和已有的估算模型进行了归纳和分析，对四院的估价现状做了进一步分析，确定参数估算法为解决问题的基本方法。