可以分解的
- 与 可以分解的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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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, searching technology of product information based on knowledge was researched. On the aspect of cognition, we researched the relation between user\'s cognition and designer\'s cognition, explored the knowledge flow in the process of product development, set up a matching model between user\'s knowledge and designer\'s knowledge, brought forward a modeling method based on users\' cognition, and set up a measurable model of product feature; coded and decoded product form element, set up a computer aided product form design system and image evaluating system based on the result of measurement. Accordingly, the product style and product image were systematically discussed, the recognition space of product style and image was constructed, the factors that affect product style and image were put forwards and analyzed, and the relation between product image and form elements was tested by experiments. Furthermore, the product automatic recognition technologies were discussed.And then, with the media of concept model and the kernel of parameter technology, a mathematic model that describing product layout design by constraints and rules was presented. Furthermore, a product design integration system based on imagery thinking including product fonii base system based on imagery thinking, product form design system based on imagery thinking and product form intelligent design system based on space layout were set up, which tested the system and provided a new way for product innovative design.
本文以产品特征描述目标对象——产品,研究一种基于知识的产品信息检索技术,在对产品的认知方面,研究了用户认知和设计师认知之间的关系,研究了产品开发过程中的知识流传递过程,建立了用户知识和设计知识之间的匹配模型,提出了一种基于用户知识的产品建模方法,它不但提取了产品的特征,还建立了产品特征量化模型,从而实现了产品知识的量化描述;对产品造型元素进行分解和编码,利用实验量化结果构造计算机辅助产品形状设计系统和心象评价系统;使用量表分析造型元素的心象尺度,构造输入、输出系统,建立了产品设计知识库咨询系统,可以方便用户和设计师来导入或查询产品设计方案;实现了对产品造型心象的分类知识库系统,便于设计师存储或查询,辅助设计师进行产品创新设计;通过实验量化了产品造型参数和产品心象参数之间的关系,并在此基础上建立了基于心象的产品形状设计系统,为产品空间布局方案智能生成系统奠定基础;在基于知识库的基础上建立了产品空间布局方案智能生成系统,通过更改概念产品造型参数,实现了产品设计方案的智能生成,使系列化的设计工作变得十分方便;将产品的心象运用到实际设计过程中,能够引导流行趋势,创造出产品无形的设计价值。
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The fourth chapter talks about the weft carrier, in this part, we mostly introduce the big gripper shuttle in the comparative way and not only analyze the structure but also analyze the stress of the fatigable parts. In the fifth chapter, the shuttle box is our research emphasis, we start with the design principle and analyze its structure and the logic of the action of the parts. The sixth chapter discusses the shoot mechanism, builds its theory model and analyzes its law of motion from the view of kinematics and kinetics during the wefting. And then, we can consider the hydraulically shoot mechanism and comprehend its principle and some special parts. Subsequently, the content is about the flying of a shuttle, because the course of the flying of a shuttle is very complex, it is necessary to study the shuttle according to mechanics and to analyze its course of motion and its change of speed from the view of energy.
第五章谈的是梭箱,这部分从梭箱的设计原理入手,从结构的角度对梭箱进行分析,考虑到梭箱上各执行件间的动作存在一定的逻辑关系,还对执行件动作时间与控制作出论述,从中可以看出重型宽幅织机所独有的特性;第六章论述投梭机构,先构造出投梭机_重型宽幅织机引纬机构与梭箱的设计_构的弹性理论模型,从动力学的角度剖析投梭规律,随后分析液压式投梭的工作原--理和一些特型元器件;第七章论述梭子的飞行运动,考虑到梭子飞行运动的复杂性,我们把梭子飞行运动划分为三个阶段,然后分阶段介绍其运动规律,在对梭子进行_运动分析的同时还详细分析它的受力情况,在这一章的最后,我们对影响梭子飞行_的因素也作出了讨论;顺沿这一过程,即是第八章对制梭机构的论述,在这一部分,、主要研究制梭过程与制梭力的情况,同梭子飞行过程一样,制梭过程也分为三个阶段,就每个阶段而言,我们都对其进行受力与运动方面分析,同时也就一些容易出现的问题作出讨论;最后两章是对纬纱交接机构和纬纱的退绕与张力控制作出讨_论,鉴于这两部分不存在复杂的动力学方面的问题,论述重点便放在结构与原理的分析上面,包括分解纬纱交接机构,解析其动作过程,介绍储纬与纬纱张力的一些情况。
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CL which can be detected during tensile testing of unaged polyami-de and UV-irradiated polypropylene specimens, has been found to be an effect of thermally unstable hydroperoxides decomposing due to stress-induced adiabatic heating, which after necking is localised to the travelling neck shoulders.
在对物理尼龙和紫外线照射过的聚丙烯样件的拉伸测试过程中,采用化合光对其进行检测,可以发现一种不稳定的热效应产生的氢分解。这是由于在受拉伸颈部的轴肩局部位置,因应力作用而产生的绝热加热。
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CL which can be detected during tensile testing of unaged polyami-de and U-irradiated polypropylene specimens, has been found to be an effect of thermally unstable hydroperoxides decomposing due to stress-induced adiabatic heating, which after necking is localised to the traelling neck shoulders.
在对物理尼龙和紫外线照射过的聚丙烯样件的拉伸测试过程中,采用化合光对其进行检测,可以发现一种不稳定的热效应产生的氢分解。这是由于在受拉伸颈部的轴肩局部位置,因应力作用而产生的绝热加热。
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Soya Bean Polypeptide that relies on rapid activities of H+ ion exchange in the gastro intestine dispossesses the intestinal passage, shortening fat's duration of stay in the intestine, particularly blocking the major absorption of cholesterol before speedily excreted. Meanwhile, part of theSoya Polypeptide stimulates squeezing pressure on the bile to boost secretion that breaks down the fat in diminishing the formation of triglyceride in the liver, bringing along the decreased appetite.
大豆多肽—依据H+离子在胃肠的快速运转,抢占脂肪在胃肠的吸收通路,减少脂肪在胃肠的停留,特别是阻止胆固醇在大肠的重吸收,并使之迅速排除体外,大豆多肽的部分片段可以促进胆囊收缩增加胆汁分泌,促进脂肪分解,减少甘油三酯在肝脏的合成,也有降低食欲的作用。
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This survival time was not significantly altered by bilateral denervation of cervical vagi (the major sensory system for detecting changes in pulmonary conditions), by bilateral denervation of peripheral arterial chemoreceptors (the major sensory system for detecting changes in arterial blood gases and pH), by pretreatment with dimethylthiourea, or by pretreatment with milrinone (a phosphodiesterase Ⅲ inhibitor that may avoid respiratory muscle fatigue).
而截断双侧颈部迷走神经(负责侦测肺内部情况的最主要感觉神经)、摘除双侧的周边化学接受器(负责侦测动脉血液气体及酸碱值的最主要化学接受器)、或投予Milrinone(一种phosphodiesteraseⅢ抑制剂,藉抑制cAMP被分解,以增加细胞内cAMP的量,可以使疲乏的呼吸肌内再增加收缩力)、Dimethylthiourea等药物的动物,都无法延长其存活时间。
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The compost of agricultural waste materials is the process that under the function of microorganism, the organic matter turn into well-rotted manure by the way of the organic matter being mineralized and humus and harmless.
农业废弃物的堆腐是在微生物作用下,通过发酵使有机物矿质化、腐殖化和无害化而变成腐熟肥料的过程,在微生物分解有机物的过程中,不但生成大量可被植物吸收利用的有效态氮、磷、钾化合物,而且又合成新的高分子有机物---腐殖质。由于这一过程是在微生物分泌酶的作用下酶促反应过程,研究酶活性变化可以从本质上揭示堆腐的生物行为。
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It appearsthat condensed-phase 〓 would be a high energy fuel with high calorific value andan ideal high energy density material. It has the advantages as follows:(1)releasesenergy through self-dissociation mode;(2)does not need carrying another substancesupplying oxygen;(3)produces the final product 〓 molecule, which has very highstability and no environmental pollution.
通过对〓的密度、爆速、爆压和比冲的理论计算,可以得出〓是一种具有很高热值的高能燃料,是一种理想的高能量密度材料,它通过自身的分解释放能量,不需要另外携带供氧物质,并产生具有高稳定性的、对环境无污染的〓分子作功。
- 推荐网络例句
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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.
每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。
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Maybe they'll disappear into a pothole.
也许他们将在壶穴里消失
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But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.
但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。