结构上的
- 与 结构上的 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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The replica material used in this study is Polydimethylsiloxane. The enlargement of replica compared to original size is 2.34%. Since PDMS is transparent, a layer of metal should be sputtered on its surface to measure optical characteristic, however the accuracy will be affected by the metal coated. The result assumes that Sternocera aquisignata, Chrysochroa rajah and Catoxantha opulenta may have one-dimensional photonic crystal structure. The fabrication of quasi-structure with elytra from Buprestid can promote the applications in the field of photonic structure and optical components.
经PDMS翻印的结果,最小仅增加原始尺寸的2.34%,翻印结果良好,但因翻印结果需镀上一层材料,使得镀上的材料严重影响结构的反射率,造成结构不同反射率也类似的情形,将结构刻画在不需镀金的材料上,将可防止镀上材料影响反射率的问题,并将所制成之结构用於防伪、光子结构研究和光学元件上。
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The main contributions of the second part of this dissertation are focused on the cryptographic properties of logical functions over finite field, with the help of the properties of trace functions, and that of p-polynomials, as well as the permutation theory over finite field: The new definition of Chrestenson linear spectrum is given and the relation between the new Chrestenson linear spectrum and the Chrestenson cyclic spectrum is presented, followed by the inverse formula of logical function over finite field; The distribution for linear structures of the logical functions over finite field is discussed and the complete construction of logical functions taking on all vectors as linear structures is suggested, which leads to the conception of the extended affine functions over finite field, whose cryptographic properties is similar to that of the affine functions over field GF (2) and prime field F〓; The relationship between the degeneration of logical functions and the linear structures, the degeneration of logical functions and the support of Chrestenson spectrum, as well as the relation between the nonlinearity and the linear structures are discussed; Using the relation of the logical functions over finite field and the vector logical functions over its prime field, we reveal the relationship between the perfect nonlinear functions over finite field and the vector generalized Bent functions over its prime field; The existence or not of the perfect nonlinear functions with any variables over any finite fields is offered, and some methods are proposed to construct the perfect nonlinear functions by using the balanced p-polynomials over finite field.
重新定义了有限域上逻辑函数的Chrestenson线性谱,考察了新定义的Chrestenson线性谱和原来的Chrestenson循环谱的关系,并利用一组对偶基给出了有限域上逻辑函数的反演公式;给出了有限域上随机变量联合分布的分解式,并利用随机变量联合分布的分解式对有限域上逻辑函数的密码性质进行了研究;给出了有限域上逻辑函数与相应素域上向量逻辑函数的关系,探讨了它们之间密码性质的联系,如平衡性,相关免疫性,扩散性,线性结构以及非线性度等;讨论了有限域上逻辑函数各类线性结构之间的关系,并给出了任意点都是线性结构的逻辑函数的全部构造,由此引出了有限域上的"泛仿射函数"的概念;考察了有限域上逻辑函数的退化性与线性结构的关系、退化性与Chrestenson谱支集的关系;给出了有限域逻辑函数非线性度的定义,利用有限域上逻辑函数的非线性度与相应素域上向量逻辑函数非线性度的关系,考察了有限域上逻辑函数的非线性度与线性结构的关系;利用有限域上逻辑函数与相应素域上向量逻辑函数的关系,揭示了有限域上的广义Bent函数与相应素域上的广义Bent函数的关系,以及有限域上的完全非线性函数与相应素域上向量广义Bent函数之间的关系;给出了任意有限域上任意n元完全非线性函数存在性与否的完整证明,并利用有限域上平衡的p-多项式的性质给出了有限域上完全非线性函数的一些基本构造方法。
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Based on investigating the short and intermittent structural plane, surrounding rockmass of the huge underground powerhouse in Three Gorge has been divided into five statistical similar areas according to its characteristic of rockmass structure by applying structure plane network simulation. Distributed characteristic of structural plane has been studied and based on it mechanics macrocharacteristic has been studied:(1) It is the first time that based on the result of structural plane network simulation rockmass quality of every structure area has been studied with applying blurred information optimum seeking technique and be compared with and RQD method. The result indicated that it has better effect to evaluate rock quality with blurred information optimum seeking technique.(2) It is the first time that the interrelated relationship of the result of in-suit rockmass deformation test and fractal characteristic of structure on test point has been applied to determine rockmass deformation parameter. The question of evaluating deformation parameters of engineering rockmass has been solved.(3) Anisotropy strength parameters have been determined by applying shear zones simulating method. The result indicated that there are different strength parameters in every structural area, after comparing the result of Fast Lagranian Analysis in continua number simulation method with that of method of weighted mean according to continuity. The result indicated that when a suitable reduction coefficient is been considered rockmass strength parameters can be simply and fast determined with method of weighted mean according to continuity where there is not enough test result.(4) Damage characteristic has been studied based on analysis fractal characteristic of structural plane network by applying fractal-damage coupling method. It is the first time that the concept of damage degree has been set up to evaluate rockmass quality according to the biggest principal damage.
通过对短小、断续性结构面统计特征的研究,将地下厂房区划分为五个岩体结构统计均质区,应用结构面网络模拟技术研究了各个岩体结构均质区结构面的发育分布特征,并以此为基础对岩体宏观力学特性进行了深入研究:(1)首次通过在结构面网络模拟计算结果的基础上,应用模糊信息优化技术研究了厂房区各个岩体结构分区的岩体质量并与岩体基本质量指标研究法、岩体质量指标RQD值研究法作了对比,结果表明以结构面网络模拟结果为基础,应用模糊信息优化技术进行岩体质量评价能够取得很好的效果,解决了工程岩体质量的定量评价问题;(2)首次通过对已有的现场大型岩体变形试验结果的分析及相应试验点岩体结构分形特征的研究,建立了结构面分布的分形维数和岩体变形指标间的相关关系,并首次应用这种相关关系根据结构面网络模拟及分形维数计算结果确定了缺少试验结果的地下厂房各工程部位的岩体变形指标而且应用于围岩稳定性计算,解决了工程岩体宏观变形参数的评价问题;(3)应用在结构面模拟网络图上模拟岩体剪切破坏带的方法,得出了岩体在不同方向上的强度参数,结果表明岩体的强度特性与结构面的发育方向和程度有着明显的关系,各个岩体结构均质区具有不同的强度参数;同时还通过应用拉格朗日差分法对岩体强度指标的数值分析并与按连通率加权平均计算法对比表明,按连通率加权平均计算法在考虑合理的折减系数情况下,可以简单快速地对缺少现场大型试验结果的具体工程部位实现岩体强度指标的估计,通过以上研究解决了工程岩体抗剪强度参数的评价问题;(4)通过结构面网络分形维数的研究,应用分形损伤耦合分析方法,研究了厂房区岩体的损伤特征,并首次引入"损伤度"的概念,建立了应用最大主损伤评价岩体质量的指标体系。
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In this thesis, a series of complexes based on aromatic multicarboxylic acids have been successfully synthesized in solutions or under hydrothermal conditions. Their structure and properties are investigated.(1) Eight complex compounds have been synthesized and characterized by X-ray single crystal diffractive technology: The eight complexes are listed as following: [Cu242] complex 1 [Cd22(H2O)4]·4H2O complex 2 [Co(H2btc)(H2O)3] complex 3 [Co2(H2O)2]·H2O complex 4 [Ni22(H2O)4] complex 5 [Cu22(H2O)4] complex 6 [Co(H2biim)2(H2O)2](H2btc) complex 7 [Zn(H2biim)2(H2O)2](H2btc) complex 8 The structure of complex 1 is dinuclear complex resulted from weak interactions(0-D chain); complex 2 is 1-D chain stucture result from interactions of water molecules; complex 3、4、5、6 are coordination polymers using hydrothermal synthses, where the first kind ligand is H4btc, the second kind ligand is phen and Co2+、Ni2+、Cu2+ as center ions, respectively. While the coordination enviroment of Co2+ is the same in complex 3, the coordination geometries around the Co atoms in complex 4 are obviously different because of the different reaction conditions. In complex 4, the 1-D chains are connected into 2-D layer through carboxy groups of ligand H4btc. The structures of complex 5、6 are 1-D chain stucture result from interactions of carboxy groups in ligand H4btc. Complex 7、8 are homeomorphy compounds. Either of them are linked to the 3-D chains through intermolecular hydrogen bonds. Each H4btc lose two protons and H2btc2- acts as negative electron balance.
合成了8个结构新颖的配合物,并用X-射线单晶结构分析方法确定了晶体结构,分别为: [Cu242] 配合物1 [Cd22(H2O)4]·4H2O 配合物2 [Co(H2btc)(H2O)3] 配合物3 [Co2(H2O)2]·H2O 配合物4 [Ni22(H2O)4] 配合物5 [Cu22(H2O)4] 配合物6 [Co(H2biim)2(H2O)2](H2btc)配合物7 [Zn(H2biim)2(H2O)2](H2btc)配合物8 配合物1是一个依靠弱作用连接的双核铜结构;配合物2借助水分子形成一维链状结构;配合物3、4、5、6是以H4btc为第一配体、phen为第二配体,通过水热法合成的配合物,其中,Co2+、Ni2+、Cu2+为中心离子;配合物3中的二价钴离子具有相同的配位环境,不同反应条件下得到的配合物4中的二价钴离子存在不同的配位环境,在配合物4中,一维链通过H4btc上的羧基形成一个二维层结构;配合物5、6是借助H4btc上的羧基形成的一维链状结构;配合物7、8属于异质同晶结构,它们的分子通过分子间氢键形成三维网状结构,H4btc上的羧基失去2个质子,作为一个二价负离子起到电荷平衡作用。
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Based on the background of China's new tax refund policy for export carries into being, this article is mainly to analyze the reform contents. And than according to the new policy's performances and influences in recent years, this paper finds some problems existing in it, aims at which some corresponding measures that especially on the share mechanism of the tax refund policy for export and its jurally standardization would be proposed on .By this way, the author hopes those suggestions would be useful to make our country's new tax refund for export works much sounder as well as promoting the innovation of China's foreign trade.
本文主要是从我国新出口退税政策所发生的经济背景和前提出发,对改革的主要内容进行分析,根据近两年来我国新出口退税政策实施的状况,及其对我国的经济所产生的一定影响,发现现阶段我国出口退税政策所出现的在管理体制和结构上的一些问题,并针对这些问题,提出我国的出口退税政策应该在出口退税的分担机制以及法制规范化等方面不断完善的几项具体建议,不断促进我国的外贸体制改革。
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At the same time, the research on the new policy which is both full of Chinese characters and suitable to the foreign trade's status in quo is urgently needed. Based on the background of China's new tax refund policy for export carries into being, this article is mainly to analyze the reform contents. And than according to the new policy's performances and influences in recent years, this paper finds some problems existing in it, aims at which some corresponding measures that especially on the share mechanism of the tax refund policy for export and its jurally standardization would be proposed on .By this way, the author hopes those suggestions would be useful to make our country's new tax refund for export works much sounder as well as promoting the innovation of China's foreign trade.
本文主要是从我国新出口退税政策所发生的经济背景和前提出发,对改革的主要内容进行分析,根据近两年来我国新出口退税政策实施的状况,及其对我国的经济所产生的1定影响,发现现阶段我国出口退税政策所出现的在管理体制和结构上的1些问题,并针对这些问题,提出我国的出口退税政策应该在出口退税的分担机制以及法制规范化等方面不断完善的几项具体建议,不断促进我国的外贸体制改革。
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Age structure is young teacher is too much; professional ranks and titles structure is absent high professional ranks; educational structure is raising step and step, but no doctor degree teacher; area structure is reasonable, teacher graduate is concentrating one or two college and university, it is not good for academic circles and development. Scientific research ability is obviously sufficient. Teaching ability is competent undergraduate course, but main courses are taught by serener ranks teacher; teachers is confidence in professional training ability.
在年龄特征上,年青教师比例偏高;在职称结构上,高职称教师比例偏低;在学历结构上,高学历比例在逐年提高,无博士学位教师,在提高学历结构的道路上还有很长的路要走;在学缘结构上,基本合理,但省内高校毕业的教师过分集中于一两所学校,不利于学术的交流与发展;在科研能力上,明显不足;教学能力,基本能够胜任本科教学的需要,但有初级职称担任主干课程的现象,会对教学质量产生一定的影响;在对训练能力和专业技术水平上,教师对自己充满信心。
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Firstly, according to study dynamic changes of the elements structures in succession about natural and artificial forest, then summarized regular patterns;at the same time.based on the study of Coupling Relationship between structure and function of water conservation forest established the ideal structures from the stand level and the watershed level. The ideal structures from the stand level: uneven-aged, double layer and mixed structure, and trend to natural forest. The watershed level followed the same principle, that is double layer patches, uneven-aged forest well-distributed and to build up different forest patches in watershed.
首先,经过对北京山区水源林天然林和人工林结构要素的演替动态研究,提出其发展规律,同时依据水源林结构与功能耦合关系研究,从林分层次和流域层次上分别构建了水源林的理想结构,其中,林分层次上水源林的理想结构为:异龄、复层、混交的结构状态,林分结构趋于天然林结构的特征;在流域层次上水源林的理想结构为也应形成&复层&、&异龄&、&混交&的结构,即:在流域各水源林斑块间形成林冠层复层、斑块内部乔木、灌木、草本层的复层;不同水源林年龄面积上的均匀分布;形成不同水源林斑块间的镶嵌分布。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。