查询词典 concurrent access

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。

Objective:To observe the effect of Bi-PAP breath machine treatment chronicity blocking lung disease concurrent breath failure curative.

目的：观察Bi-PAP呼吸机治疗慢性阻塞性肺疾病并发呼吸衰竭的疗效。

According to the analysis of the characteristics of concurrent tolerance optimization design, it could be regarded as the hybrid variable combinational optimization problem.

通过对并行公差优化设计的分析，将其视为一种混合变量组合优化问题。

They can now process a huge number of concurrent complex queries efficiently over enormous and diverse data sets.

现在的数据库系统可以同时处理在多种多样的庞大数据集上的大量复杂并发查询。

Concurrent computation model is one of the most important problems in theoretical computer science.

并发计算模型是计算机科学研究的重要问题之一。

This research has significance for the implementation of concurrent engineering and computer integrated manufacturing.

此研究对实施并行工程及计算机集成制造有重要意义。

This research have great importance to guide the implementation of computer aided concurrent design and promote the product development.

本项目研究对于指导计算机辅助并行设计实施及促进企业产品开发水平的提高具有重要意义。

Node-locked - Software is licensed for unlimited concurrent use on a single computer system.

节点锁定-软件许可无限的并行使用一个单一的计算机系统。

The message-passing net work in the first-generation message-passing concurrent computer is the traditional one. Be cause of its long latency, it can only be applied to the coarse grain parallel applications.

第一代消息传递式处理机系统中应用的是传统消息传递网，它的消息传输延迟很大，使得这种形式的并行计算机系统只能用于粗粒度的平行处理。

Based on the theory and methodology mentioned above, an integrated software system, namely Computer Aided Concurrent Design system, is developed with C language, Windows SDK and computer network techniques to support CD process modelling which include some key aspects, such as organization, plan, and configuration issues; to provide assistance which cover service mechanism for information sharing and management mechanism for CD process monitoring and controlling in a distributed environment.

以本文提出的并行设计理论和并行设计实施方法论为指导，面向并行设计过程的分析、规划、管理与控制，研究了并行设计支撑环境的组成、功能、实现方法，并以C语言、Windows开发技术、网络通讯技术建立、开发了并行设计建模与实施支撑环境的原型系统，并结合平行分度凸轮机构的设计、制造进行了具体的应用。

It inculcates justification before God on the ground of human merits.

它说明在上帝灌输在地上人类优点。

TH Leaguer has excellent Quality Control and Management System.

本公司具有完善的品管部门。