Pro/Engineer的参数化零件二次开发研究与实现

本文详细研究了利用Pro／E二次开发工具Pro／Toolkit进行参数化二次开发、原理、方法和实现的关键技术，建立了参数化零件二次开发模型和开发流程，利用VC ，实现了3D零件模型的二次开发。     

按原型化方法开发CAPP系统

由于工艺设计的多样性，ＣＡＰＰ的开发都以专用系统进行，严重影响了ＣＡＰＰ的推广和应用，作者讨论了工艺设计的一般规律与规则，提出用成组技术与标准化的方法开发ＣＡＰＰ系统的原型化设计，提供二次开发的方法，是商品化ＣＡＰＰ的基础，介绍了原型化设计方法的基本概念，建立工艺设计系统原型的分析，ＣＡＰＰ系统的原型设计及二次开发的目的与内容。     

薄层稠油油藏三维精细地质建模技术研究与应用

[摘要】利用地质建模技术建立杜48块杜家台油藏断层模型、层面构造模型、沉积相模型和属性模型，得到油藏三维精细数据体，对三维油藏的微构造及油水分布情况进行精细描述，优化水平井设计，挖掘油藏剩余油潜力。该项技术应用于稠油薄层油藏二次开发中，其研究成果在现场应用中取得了较理想的开发效果，从而指导了稠油老区二次开发的高效进行。     

PRO/E二次开发技术在新型干法预分解窑生产建模中的应用

主要论述了PRO/E二次开发技术对企业的重要性,阐述了Pro/TOOLKTY二次开发在干法生产预分解窑生产建模中的应用,介绍了Pro/TOOLKTY开发的基本步骤、一些关键技术及运用二次开发提高设计效率的重要手段。     

基于C#的Mapinfo二次开发研究

本文总结概括了Maplnfo二次开发的四种方法,选取了基于OLE自动化技术的Maplnfo的二次开发方式。在VisualStudio．NET为开发环境下,采用回调技术实现了Maplnfo的二次开发,该方法充分发挥了．NET环境编程的优点和Maplnfo的GIS功能强大性。     

短信网关的二次开发与实现

短消息业务作为一种极具吸引力的增值业务，已经得到了越来越多用户的认可。短信网关，英文简称ISM6，全称Internet Short Message Gateway，主要是为了解决不同网络、不同运营商之间的短信互通和服务提供商的接入问题。它为应用单位收发短信提供了一个动态的数据交换平台。笔者结合单位应用实际就移动短信网关二次开发与实现方面的心得体会做了介绍，说明了二次开发涉及的短信接口的开发和短信服务软件的开发的原理。     

基于solidworks的参数化设计

本文介绍了solidworks建模过程；介绍了如何通过VC＋＋软件对solidworks进行二次开发，实现零件的参数化设计：     

CAT IA曲面法向量和坐标转换的算法研究与应用

提出了一种新的算法用于实现VB语言对CATIA曲面法向量和坐标转换的二次开发。该算法基于方向余弦法和新坐标系轴上3个特殊点实现转换，巧妙地解决了CATIA提供给VB语言二次开发中用于测量角度的函数的不稳定性问题，规避了直接采用测量角度进行的一系列计算（如用角度来求方向余弦值），为CMM数据源的正确性提供了有力保证。基于该研究成果，现已利用VB语言成功开发出“CMM测量点采集辅助软件”，并取得了相关软件著作权。     

UG二次开发中C~(++)、KF、GRIP 3种语言的对比

为提高UG二次开发效率,改善UG二次开发界面风格,以C~(++)、KF、GRIP 3种语言为开发方式,结合UG/Open Menu Script和UG/Open UIStyler两种开发工具,对UG进行二次开发.通过实例对比,总结出了3种开发语言的优缺点.     

光滑极限量规CAD系统设计

介绍了光滑极限量规CAD系统的构成及主要模块功能，讨论了设计源程序的编译与打包，并对AuToCAD2000二次开发应用中的一些技术问题进行了探讨。     

Surface structures on second order prism faces of synthetic quartz crystals

Surface structure studies on various {1120} (second order prism) faces of synthetic quartz crystals are reported. Horizontal striations and polygonal growth pyramids are predominant on these faces. Growth layers modified by the presence of guest microcrystals attached to the host second order prism faces are illustrated and explained. It is shown that microcrystals and impurities influence growth and development of second order prism faces of synthetic quartz crystals. Mechanism of growth of these faces is assessed in the light of the observed surface structures.     

Texture development in two-pass ECAE-processed beryllium

Texture development and substructure evolution are described for pure beryllium given two-pass equal channel angular extrusion (ECAE) processing following routes A and C. These routes impose different strain paths between the first and second passes—the former cross-shearing and the latter reversal. Polycrystal calculations that are in good agreement with the texture measurements suggest that basal slip and, secondly, prismatic slip are operative in both passes of both routes. Multi scale polycrystal modeling is shown to effectively predict texture evolution to strains of two caused by both ECAE processing routes. Shear-like deformation textures observed in the second pass of route C are explained by differences in deformation characteristics between the first and second passes.     

通过热处理提升镁合金综合力学性能:第二相的变化与作用

在镁合金研究中,第二相极大地影响了合金的综合力学性能。热处理技术可以很好地改善第二相的类型,形貌及分布状态;从而提高合金的综合力学性能。基于此,系统地对镁合金的热处理类型进行了介绍;综述了常用镁合金在不同热处理工艺下第二相的变化及对综合力学性能的影响。同时就镁合金热处理技术、热处理常见问题以及国内外先进热处理技术进行了讨论,最后展望了先进镁合金热处理发展趋势。     

二阶非线性光学氧化物玻璃的研究进展

概述了玻璃非线性光学材料的类型;从极化方式上系统地介绍了二阶非线性氧化物玻璃的研究进展;讨论了产生二阶非线性的机理;最后对非线性氧化物玻璃的应用前景进行了评价的预测。     

The determination of the elastic T-term using higher order weight functions

It has been shown in a recent work [1] that the elastic T-term at the tip of a mixed mode crack can be determined by the so-called second order weight functions through a work-conjugate integral that is akin to that of the Bueckner-Rice weight function method for evaluating stress intensity factors. In this paper, the development of the second order weight functions is reviewed. These second order weight functions are determined using a unified finite element method introduced in [2]. The finite element procedure handles both traction and displacement boundaries and it permits the Bueckner-Rice weight functions and the second order weight functions for the elastic T-term to be determined in one single finite element run. The accuracy of the computed weight functions is assessed by comparing the computed results with special closed form solutions. The numerical values of the elastic T-term for single edge notch specimens under tension, pure bending and three-point bend are given. The corresponding second order weight functions are tabulated.     

基于模块的零部件参数化设计系统的研发

阐明了模块化的概念,提出了模块化设计结构的特征,在阐明参数化设计方法基础上,将模块化思想与参数化设计方法相结合,并利用SolidWorks二次开发技术,研究并提出基于模块的零部件参数化设计系统的框架和实施步骤．最后以北京桌公司的减速器为应用实例,实现减速器模块的参数化设计系统验证,并获工程应用．     

Confined laminar wakes at small and large Reynolds number

Summary The development of the wake flowfield behind a symmetric cascade of finite-thickness flat plates in steady two-dimensional laminar incompressible flow is investigated for a wide range of Reynolds number. A spectral method is used to obtain the solution to a low-Reynolds-number expansion of the Navier-Stokes equations as well as a second approximation to the Oseen equations. Comparisons to the results of the second Oseen approximation are made with previously obtained solutions to the slender-channel equations for large Reynolds number as well as with solutions to the low-Reynolds-number expansion.     

Applications of acoustic charge transport

The emerging technology of acoustic charge transport (ACT), which has enabled the implementation of powerful signal processors capable of handling high-speed RF and microwave signals in their natural analog domain, is reviewed. The development of ACT technology has led to the implementation of fully programmable analog signal processors capable of performing over 45 billion multiply-and-accumulate operations per second. These processors are finding application as adaptive filters and equalizers in a variety of commercial and military systems. The operation and performance capabilities of the ACT device are described, and seven applications now under development are discussed.     

Impact Damage Detection in Composite Structures Considering Nonlinear Lamb Wave Propagation

To detect micro-structural damages like fiber/matrix cracks and delaminations in composite materials accurately new methods are developed. Previous works have investigated and shown that the acoustical nonlinearity parameter is a good tool to detect micro-structural damages like plasticity in metal and fatigue damages in metal and composites. In this work, the second harmonic generation is used to analyze composite specimens for impact damages. Therefore, Lamb waves are launched and detected by a piezoelectric actuator and sensor, respectively, at a certain frequency to generate cumulative second harmonic modes. The excitation frequency has to meet special conditions. The signal processing is done by using the wavelet transform to avoid misinterpretations that may occur using the short-time Fourier transform. The Morlet wavelet is used as the mother wavelet. The results of the relative acoustical nonlinearity parameter are compared to the development of the group velocity due to impact damages. It is shown that the relative acoustical nonlinearity parameter is more sensitive to impact damages than the development of the group velocity.     

Comparison of the 1st, 2nd and 3rd generation Lawrence Livermore National Laboratory Torso phantoms

The Lawrence Livermore National Laboratory (LLNL) Torso phantom, which is the de facto standard for lung counter calibration for low energy photon emitters, has undergone a number of revisions since its development. The first generation used real human bone: the second generation used synthetic bone and had a major design change; the third generation had more subtle material and mould changes. This work has compared a first generation, two second generation, and two third generation LLNL phantoms to see if there are any differences between the phantoms. The comparison of five LLNL phantoms using the same counting regions has shown that the second and third generation phantoms are essentially equivalent at low photon energies, but the first generation phantom shows an increased counting efficiency at low photon energies due to a design flaw. It is also apparent that these phantoms have maintained their performance characteristics over an extended period of time.