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This paper presents an IFMC CAD model that consits of a geometry model and a material model, in which the geometry space acts as a base space and the material space acts as a bundle space. In this CAD model, the geometry model is based on the non-manifold model. In addition, a half-face data sturucture, which is derived from the half-edge data structure with the non-manifold feature of IFMC taken into account, is adopted to represent the geometry and topology information of the component. For the material model of IFMC, this paper focuses on the FGM component representation firstly and present a simplex-subdivision based CAD data exchange format, in which the material information is represented as a (n-1) simplex and material distributing feature is represented by the interpolation on the simplex-subdivision. Based on those, a part-building orientation optimization algorithm and an adaptive slicing algorithm for FGM component are presented in the paper. For the IFMC material model, the IFMC material information representation is divided into a meso-scale and a macro-scale representation. In the meso-scale, a concept named parameterized periodic functional meso-structure is presented as a unique form to represent the FGM (the homogeneous materials are regarded as a special FGM), the composite and the functional meso-structure material. The model of PMS is a three-tuple that contains the space state informatation, the material parameter and the material meso-scale distribution feature. The macro-scale material information representation is similar to the FGM components by interpolation of the control parameter of the periodical functional meso-structure based on the simplex-subdivision. Through an example of manufacturing-oriented IFMC CAD data processing, it is proved that the IFMC CAD model and the material information representation and process method proposed in this paper can provide a reliable data support for IFMC digital concurrent design and manufacturing.
本文将理想材料零件CAD模型建立在以几何空间为底空间、以材料空间为丛空间的结构上,使用非流形几何模型作为理想材料零件几何拓扑模型的基础,并在半边数据结构基础上,针对理想材料零件的非流形特征局限内部边界上的特点,给出了一个半面数据结构来表述零件的几何拓扑信息;对于理想材料零件的材料模型,本文先从功能梯度材料零件的信息表述与CAD数据交换和处理入手,将材料信息表述为(n-1)维单纯形,然后通过对三维几何区域的单纯剖分,以插值的方式表述零件材料分布特征;在此基础上,根据功能梯度材料零件分层制造中对CAD数据处理的要求,给出了综合考虑零件几何特征与材料特征的生长方向优化算法和自适应切片算法;而对于文中所定义的理想材料零件,本文将其材料信息表述分解到细观和宏观两个尺度进行,首先给出了细观尺度上参数化的周期性功能细结构概念,以此来统一表述功能梯度材料(单质材料作为特殊的功能梯度材料看待)、复合材料和功能细结构材料;把周期性功能细结构模型化为一个包含空间状态信息、材料构成参数和材料细观分布特征参数的三元组,以表达零件的细观材料特征;对于零件宏观的材料变化特征,则同样在几何区域单纯剖分的基础上,通过对细观尺度上周期性功能细结构控制参数的插值来完成;通过理想材料零件CAD数据处理的算例,验证了本文中理想材料零件CAD模型及材料信息表述与处理方法完全可以为理想材料零件的数字化制造提供可靠的数据支持。
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This paper presents an IFMC CAD model that consits of a geometry model and a material model, in which the geometry space acts as a base space and the material space acts as a bundle space. In this CAD model, the geometry model is based on the non-manifold model. In addition, a half-face data sturucture, which is derived from the half-edge data structure with the non-manifold feature of IFMC taken into account, is adopted to represent the geometry and topology information of the component.For the material model of IFMC, this paper focuses on the FGM component representation firstly and present a simplex-subdivision based CAD data exchange format, in which the material information is represented as a (n-1) simplex and material .distributing feature is represented by the interpolation on the simplex-subdivision. Based on those, a part-building orientation optimization algorithm and an adaptive slicing algorithm for FGM component are presented in the paper.For the IFMC material model, the IFMC material information representation is divided into a meso-scale and a macro-scale representation. In the meso-scale, a concept named parameterized periodic functional meso-structure is presented as a unique form to represent the FGM (the homogeneous materials are regarded as a special FGM), the composite and the functional meso-structure material. The model of PMS is a three-tuple that contains the space stateinformatation, the material parameter and the material meso-scale distribution feature. The macro-scale material information representation is similar to the FGM components by interpolation of the control parameter of the periodical functional meso-structure based on the simplex-subdivision.Through an example of manufacturing-oriented IFMC CAD data processing, it is proved that the IFMC CAD model and the material information representation and process method proposed in this paper can provide a reliable data support for IFMC digital concurrent design and manufacturing.
本文将理想材料零件CAD模型建立在以几何空间为底空间、以材料空间为丛空间的结构上,使用非流形几何模型作为理想材料零件几何拓扑模型的基础,并在半边数据结构基础上,针对理想材料零件的非流形特征局限内部边界上的特点,给出了一个半面数据结构来表述零件的几何拓扑信息;对于理想材料零件的材料模型,本文先从功能梯度材料零件的信息表述与CAD数据交换和处理入手,将材料信息表述为(n-1)维单纯形,然后通过对三维几何区域的单纯剖分,以插值的方式表述零件材料分布特征;在此基础上,根据功能梯度材料零件分层制造中对CAD数据处理的要求,给出了综合考虑零件几何特征与材料特征的生长方向优化算法和自适应切片算法;而对于文中所定义的理想材料零件,本文将其材料信息表述分解到细观和宏观两个尺度进行,首先给出了细观尺度上参数化的周期性功能细结构概念,以此来统一表述功能梯度材料(单质材料作为特殊的功能梯度材料看待)、复合材料和功能细结构材料;把周期性功能细结构模型化为一个包含空间状态信息、材料构成参数和材料细观分布特征参数的三元组,以表达零件的细观材料特征;对于零件宏观的材料变化特征,则同样在几何区域单纯剖分的基础上,通过对细观尺度上周期性功能细结构控制参数的插值来完成;通过理想材料零件CAD数据处理的算例,验证了本文中理想材料零件CAD模型及材料信息表述与处理方法完全可以为理想材料零件的数字化制造提供可靠的数据支持。
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In this paper, based on the project, Study on the key technologies and development of CAPP based on extranet (No.2001102073), which supported by doctor startup foundation in Liaoning province, some key technologies of CAPP extranet-based are studied, in addition, a B/S-based and interactive and derivable WEB-CAPP prototype system is developed.
摘要本文以作者参与的辽宁省博士启动基金资助项目《面向企业网络环境的CAPP关键技术研究与系统开发》(编号:2001102073)为背景,对面向企业网络环境的CAPP若干关键技术进行了研究,并开发了一套基于B/S模式,交互型、派生型复合的WEB-CAPP原型系统。
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With the rapid development of web-based education , the Network-Based Curricula Resources are also constructed speedily and applied extensively in varied fields of web-based teaching and E-learning .The NBCR is the core and basis of the whole web-based education , but currently NBCR is serious lack of integration and conformity, including low-level construction and underdevelopment , the dissimilitude of standards and technologies , repeatedly projected and created , bad stability of curricula resources system , impedient cross-operation of NBCR , deficiency of outstanding NBCR , etc..
目前,作为网络教育基础与核心内容的网络课程资源缺乏整合的现象普遍存在,不仅造成了大量的人力、物力、财力与教育信息资源的浪费,而且低水平开发、标准各异、稳定性差、重复建设、资源零散、条块分割、共享机制缺乏、互操作不畅、资源保障不力、优质网络课程资源匮乏等不利因素,已经严重影响了网络教学与网络学习的质量与效益。
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According to the organization unit and role based resource modeling, we put forward a corresponding resource allocation strategy, i. e. EDD and workload based resource allocation strategy. In the paper we also give the workload based resource selection algorithm, EDD and workload based deadlock detection algorithm, and unlocking method.
根据资源的基于角色和组织单元的建模方法,我们提出了相应的资源分配策略,采用基于EDD和工作量的资源分配策略,并提出了基于工作量的资源选择算法、基于EDD和工作量的死锁检测算法和解锁方法。
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In practice, there exists all kinds of emolument system and they can be concluded into four modes: post-based mode, performance-based mode, skill-based mode and market-based mode.
在实践中,存在着各种各样的薪酬制度,这些制度大致可以归纳为四种模式:基于岗位的薪酬模式、基于绩效的薪酬模式、基于技能的薪酬模式、基于市场的薪酬模式。
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The water resources change is a leading factor in the vegetation degeneration there; The swamp vegetation was based on the background of large-scale lakes and rivers; the halophyte meadow was based on the background of dry lakes and riverside, and desert vegetation was based on the background of desert; desert vegetation was based on the background of desert at present.
水资源的变化是决定当地植被退化的主导因子,在大面积湖泊、河流背景上是沼泽植被,在干涸湖泊、河床背景上的是盐生草甸植被,在沙质荒漠背景上的是荒漠植被。
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In this paper the definition of signcryption KEM is extended in ID-based cryptography. Based on Sakai-Kasahara identity-based key contracture and elliptic-curves-related hard problems, an instance scheme of ID-based signcryption key encapsulation is proposed. Security properties of the proposed scheme are proven with the random oracle model.
在基于身份密码体制上扩展了签密密钥封装的定义,结合Sakai-Kasahara私钥提取结构以及椭圆曲线上相关的困难问题给出了一个基于身份的签密密钥封装的实例方案,并在随机预言机模型下对该实例方案的安全性进行了证明。
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Based on the outcome of Xu Yang and Qin Keyun about lattice implication algebra and lattice-valued prepositional logic LP with truth-value in a lattice implication algebra, the author studied the properties of lattice implication algebra and the α-automated reasoning method based on α-resolution principle of LP. The specific contents are as follows: The Study of Lattice Implication Algebra On the basis of previous results of lattice implication algebra, this part consists of the following three points: 1. Some properties of lattice implication algebra L were discussed, and some important results were given if L was a complete lattice implication algebra. 2. The properties of left idempotent elements of lattice implication algebras were discussed, and the conclusion that lattice implication algebra L was equals of the directed sum of the range and dual kernel of a left map constructed by a left idempotent element was proved. 3. The properties of the filters of lattice implication algebra were discussed, the theorem was shown that they satisfy the hypothetical syllogism and substitute theorem of the propositional logic. 4. The concept of weak niters of lattice implication algebras and their properties and structures are discussed. It is proved that all weak filters of a lattice implication algebra form a topology and the the implication isomorphism betweem two lattice implication algebras is a topological mapping between their topological spaces. The Study of α-automated reasoning method based on the lattice-valued propositional logic LP In this part, the author given an a-automated reasoning method based on the lattice-valued propositional logic LP.
本文基于徐扬和秦克云的关于格蕴涵代数和以格蕴涵代数为真值域的格值命题逻辑系统LP的研究工作,对格蕴涵代数以及格值命题逻辑系统LP中基于α-归结原理的自动推理方法进行了系统深入的研究,主要有以下两方面的研究成果:一、关于格蕴涵代数的研究 1、对格蕴涵代数的格论性质进行了研究,得到了当L为完备格蕴涵代数时,关于∨,∧,→运算的一些结果; 2、对格蕴涵代数的左幂等元进行了研究,证明了格蕴涵代数L可以分解为任何一个左幂等元所对应的左映射的像集合与其对偶核的直和; 3、对格蕴涵代数的滤子的性质进行了研究,证明了滤子的结构相似于逻辑学中的Hypothetical syllogism规则和替换定理; 4、给出了格蕴涵代数中弱滤子的概念,对弱滤子的性质个结构进行了研究,证明了格蕴涵代数的全体弱滤子构成一个拓扑结构,格蕴涵代数之间的蕴涵同构是相应的拓扑空间之间的拓扑映射。
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Based on fouling monitoring of boiler,this papers studied on method based on minimal cleanliness factor to determine sootblowing opportunity, method based on best frequency to calculate critical cleanliness,method base on the principle of maximal heat income caused by sootblowing to determine sootblowing period, method based on the principle of safety first to determine sootblowing schedule. All the above methods together can determine the correct schedule to sootblowing system.
基于锅炉各受热面的实时监测模型,本文在保证设备安全运行的前提下,从经济性出发,提出了基于临界清洁因子确定最佳吹灰时机和根据吹灰收益最大原则确定最佳吹灰周期,并给出基于吹灰最佳频率确定临界清洁因子的方法,给出制定合理的吹灰方案的步骤。
- 相关中文对照歌词
- BasedGod Fucked My Bitches
- CNBFTBGB Based Freestyle
- Money Over Suckas
- Everything Based
- Be Brave Welcome Home
- Wonton Soup
- Cashout On Me Based Freestyle
- Pretty Boy
- Bitch Mob Gangsta
- So Based
- 推荐网络例句
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But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.
但是,这是不可能的,只要是搞市场经济,是有风险的任何行动。
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We're on the same wavelength.
我们是同道中人。
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The temperature is usually between 300 and 675 degrees Celsius.
温度通常在摄氏300度到675度之间。