查询词典 presents

Content of chlorophyll of lamina of each test group and fast light answer the trend that the curve all presents to rise to drop again first, grow with bulrush of development seasonal metabolic rule photograph is consistent.

各试验组叶片叶绿素含量和快速光响应曲线均呈现先上升再下降的趋向，和芦苇生长发育的季节性变化规律相一致。

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。

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。

A British vicar reduce d young hildren to tears and stunned their parents when he said Santa Claus and his reindeer would burn to a crisp while delivering presents at supersonic speed.

近日，一位英国教区牧师的一句话让无数小孩子哭出了声，也使他们的家长目瞪口呆不知所措。他说，如果圣诞老人真的驾着驯鹿以超音速飞行在空中给孩子们送礼物的话，他早就起火烧成碎片了。

A British vicar reduced young hildren to tears and stunned their parents when he said Santa Claus and his reindeer would burn to a crisp while delivering presents at supersonic speed.

近日，一位英国教区牧师的一句话让无数小孩子哭出了声，也使他们的家长目瞪口呆不知所措。他说，如果圣诞老人真的驾着驯鹿以超音速飞行在空中给孩子们送礼物的话，他早就起火烧成碎片了。

Several hundreds of students dressed as Santa Claus A British vicar reduced young hildren to tears and stunned their parents when he said Santa Claus and his reindeer would burn to a crisp while delivering presents at supersonic speed .

近日，一位英国教区牧师的一句话让无数小孩子哭出了声，也使他们的家长目瞪口呆不知所措。他说，如果圣诞老人真的驾着驯鹿以超音速飞行在空中给孩子们送礼物的话，他早就起火烧成碎片了。

Aiming at this target, this paper presents a new approach, which adopts special keyboard and nixie tube driven chip and I2C bussing technique in hardware design, and three level interrupt priority software structure in software design.

针对以上目标，该研究在硬件设计上采用专用键盘扫描与数码管驱动芯片ZLG7290和I2C总线技术，软件设计上采用三级中断优先级软件结构，使得控制系统很好地达到了设计目标。

This paper presents the theory and development of flash butt welding technology,and its application in construction of large-diameter pipeline of Soviet Union,discusses the prospect of using this technology in China.

简要叙述了闪光焊接技术的原理和发展状况，并通过对前苏联在大直径管道建设中应用闪光焊接技术情况的介绍，探讨了在我国管道建设中应用这项技术的可能性。

Because of the bypath role, it has the recycling export side pipeline domestic waters function, moreover when the import side presents the vacuum, supplements pilots.

由于起到旁道作用，所以其有回收出口侧管道内水的功能，而且在进口侧出现真空时，补充引水。

Through analyzing the influence of refrigerants on the environment and calculating unit energy consumption and pollutant discharging amount, this paper presents that better energy environmental benefits can be achieved by utilizing air-cooled heat pump for heating.

通过对制冷剂的环境因素分析及对机组能耗、污染物排放量的计算，说明利用风冷热泵供暖具有较好的能源环境效益。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！