英语人>网络例句>presented 相关的网络例句
presented相关的网络例句

查询词典 presented

与 presented 相关的网络例句 [注:此内容来源于网络,仅供参考]

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。

Presented with early artery enhancement and immediate wash out ,Two cases presented with wash in quickly and wash out slowly .The enhancement pattern of 36 liver metastatics cases was divided into the little blood provides group and the much blood provides group . The 5 cases of haemangioma were enhanced centripetally in portal phase and washed out after several minutes without arterial enhancement.

通过造影后的表现还可明确提示以下几个方面:(1)肿块内的坏死区;(2)在延迟相发现了肝内小转移灶,从而改变了临床治疗方案;(3)滋养动脉的显示;(4)门脉内栓子的鉴别诊断。36个转移性肝癌病灶分为少血供转移癌组和多血供转移癌组。6例肝血管瘤中5例均表现为向心性环行持续缓慢充填,另一例9mm的小血管瘤表现为完全、快速向心填充。

According to the principle of quantum mechanics, exploringly presented the possible mechanism of large-scale expansion at forepart of earth, quanta earth tectonic dynamic mechanism formed from super solid state of centrosphere material, presented the integral tectonic criterion in the process of evolution of earth system considering potential of quanta, potential energy of gravitation and heat energy as a result of special state of matter of centrosphere.③Established the evolutional model of finite nonlinear expansion to of integral tectonic dynamic of earth expansion., presumed and gived the skeleton model of original forepart earth before expanding. Applying the universal large scale finite element software, for the first time considered heat power and self gravitation in the same model of tectonic dynamic model simultaneously.

较系统地讨论了地球膨胀整体构造动力的若干基本理论问题:①分析汇总了地球演化产生、积累和以各种形式损耗的总能量,根据考虑引力势能与热能的维里定理,对现时地球整体动力状态进行判断;②根据量子力学原理,探索性地提出地球大规模膨胀的可能机制——地核物质超固态形成量子简併压强产生的动力——地球量子动力,给出了考虑地核特殊物态的量子势能、引力势能和热能的地球系统演化过程中的整体动力状态判据;③建立了地球膨胀整体构造动力的非线性有限膨胀演化模型,推测给出膨胀前早期地球的轮廓性模型。

Results: The cerebral paragonimiasis appeared as follow: type of cerebritis in 5 cases, type of cyst in 2 cases. On plain CT, the type of cerebritis presented patchy low-density or heterodensity areas; the type of cyst presented irregular cystic low-density areas.

结果:7例中 5例为脑炎型,CT平扫病灶为片状低密度或不均匀混杂密度灶。2例为囊肿型,平扫呈不规则囊状低密度。

Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型,即带限位装置的摩擦隔震体系;基于此隔震模型,利用Floquet理论研究地面谐运动下S-LF结构的运动特性;并利用高精度的精细时程积分法,通过对地震作用下S-LF动力响应的计算,绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱,并研究了各种结构参数对隔震的影响;通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明,S-LF的隔震性能优于P-F和R-FBI;对计算实例的分析发现,地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

The compilatory method is used to study the grammar check, and the logic ruler method is presented; On the interference verification, the rapid algorithm of over—cut verification is presented, which can pre—verify multiple NC blocks.

采用编译理论对语法检查进行了研究,给出了零件程序的词法检查状态图,并提出了新的采用逻辑尺的语法检查方法;干涉校验方面,提出了一种新的过切削的快速校验算法,可以实时预校验多个零件程序段,提高了校验能力。

In the ANN based CAPP tool, the compound representation method of rule and network is presented to represent the technological knowledge, and the idea of an ANN block is presented to accomplish knowledge extracting and exchanging from rule to weights matrix on network.

在基于ANN的CAPP系统开发工具中,工艺知识采用规则和网络相结合的复合表示方法。

The experiment to demonstrate the bi-directional conductibility of power MOSFET is also presented in this paper. A power supply of TTCF with synchronous rectification is designed.The waveform,experiment data and analysis of it are presented in this paper,which shows that the design is avaible in practice.

作者设计了一个双管正激同步整流变换器,文章最后给出了相关实验波形及数据并进行了分析,证明了该设计方案的可行性。

It is finally shown by two examples that, compared with the methods presented in the literatures, the method presented in this paper can reduce the conservativeness of the results, which indicates the validity of the proposed method.

最后,通过两个示例表明,与文献方法相比,采用文中所提方法可减少结果所存在的保守性,证明了文中方法的有效性。

The characters of linear complexity profile of periodic sequences are investigat- ed. The relation between the continued fraction expansion of rational function and its 1- inear complexity profile is established. The expression of linear complexity profite is gi-~~en and a condition estimating the randomness of a sequence is presented. By the linear complexity profile, the bound of sphere complexity is proposed. A formula to record the number of sequences with given linear complexity profile is presented.

研究了周期序列的线性复杂度曲线特性,在周期序列生成函数的连分式展开式与线性复杂度曲线之间建立联系,给出了周期序列线性复杂度曲线的表达式;给出了判断序列随机性好坏的一个条件;利用线性复杂度曲线特性给出周期序列球体复杂度的一个估计;给出了具有给定线性复杂度曲线的序列个数的一个计数公式。

第5/100页 首页 < 1 2 3 4 5 6 7 8 9 ... > 尾页
推荐网络例句

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达,对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲:这种病是最常见的原因查明腹泻病,在世界上。

Gangs fill the daily lives of many of our poorest and most vulnerable citizens with a terror that the court does not give sufficient consideration, often relegating them to the status of prisoners in their own homes.

法院没有充分的考虑到黑社会的猖獗所带来的恐怖,这使得我们最穷、最可怜的市民每天生活在他们的阴影当中,成为在家的囚犯。