基于虚拟仪器技术的水质监测仪的设计

采用通用数据采集卡HY— 6 0 70设计了一种基于虚拟仪器软件平台LabVIEW的水质监测仪 .该设计采用PC—DAQ结构 ,在Windows环境下通过对动态链接库 (DLL)的编制与调用实现HY—6 0 70与LabVIEW的连接 ,软件设计使用图形编程语言以框图的形式进行程序编写 .与传统智能仪器相比 ,采用虚拟仪器技术的测试设备在智能化程度、性能价格比、灵活性、可操作性等方面具有明显的优势 .     

基于虚拟仪器技术的城市供水网络测控系统

运用虚拟仪器技术将测控仪器仪表与计算机融为一体,在LabVIEW平台上的Datasocket服务器的支持下,将数据发布到Internet上,实现城市供水系统的远程数据传输与控制.     

3D服装虚拟技术的研究进展及发展趋势

介绍了国内外3D服装虚拟技术的研究现状及发展趋势,并概述了3D服装虚拟技术研究的两大关键问题。     

Potential of virtual worlds for marketing tests of product prototypes

For manufacturers of physical goods, conducting market tests of product prototypes to assess consumers' preferences can be costly and complex. To some extent, production and logistic processes need to be in place, not just the marketing rationale. We put forth the hypothesis that virtual worlds may be a feasible environment to conduct early market tests of product prototypes for some physical products. The rationale for this hypothesis is that such tests with virtual versions of product prototypes may be conducted with minimal overhead, based on resources from marketing and design departments, without resources from production or logistics. They could be a first filter or selection process to determine which product prototypes demonstrate better acceptance by the public, with reduced costs and complexity. An expectation is that by having simpler and less costly tests, a wider variety of product prototypes can be considered, and test number and frequency increased, supporting better information gathering. A central question in this regard is the level of similarity between the preferences of the public when presented with virtual items, in comparison with the actual physical items. To attain data about this, we carried out an exploratory study, creating a set of both virtual and physical prototype versions of a physical product: t-shirts. We then invited virtual-world users to experience the virtual t-shirts on their avatars and express their preferences. Finally, we presented users with the option to buy the physical t-shirts with their own money, at promotional cost (as a reward for participating in the virtual trial), but explicitly told them, as they held the various physical versions in their hands, that they could change their preference at no extra cost. The results identified the level of similarity and differences between buyers' preferences in these two situations, pointing to the significant potential of using a virtual world to conduct market tests to assess consumers' preferences on prototypes of physical t-shirts.     

Short communication: The water footprint of dairy products: case study involving skim milk powder

In the context of global water scarcity and food security concerns, water footprints are emerging as an important sustainability indicator in the agriculture and food sectors. Using a recently developed life cycle assessment-based methodology that takes into account local water stress where operations occur, the normalized water footprints of milk products from South Gippsland, one of Australia's major dairy regions, were 14.4 L/kg of total milk solids in whole milk (at farm gate) and 15.8 L/kg of total milk solids in skim milk powder (delivered to export destination). These results demonstrate that dairy products can be produced with minimal potential to contribute to freshwater scarcity. However, not all dairy production systems are alike and the variability in water footprints between systems and products should be explored to obtain strategic insights that will enable the dairy sector to minimize its burden on freshwater systems from consumptive water use.     

虚拟制造在服装生产系统上的应用

针对虚拟制造技术在服装生产上的应用问题,设计了服装虚拟生产系统。通过搭建系统数字化体系结构、开发虚拟制造核心建模技术来分析服装虚拟生产系统的建立。采用IWATA技术架构实现了服装虚拟生产系统的处理模块集成与协同管理目的。针对服装虚拟生产系统体系结构中数据库建立、数据的导入,以及虚拟制造建模技术等系统构造中存在的核心问题提出了对应的解决途径,完善了搭建服装虚拟生产系统的体系方法,对虚拟制造技术与服装生产系统的协同有一定参考意义。     

虚拟现实技术在食品工厂机械与设备教学中的应用

为提高学生对食品机械结构和原理的认识和理解,以高校食品工厂机械与设备课程面向专业及教学大纲为出发点,摒弃传统课堂大满贯式教学模式,提出将虚拟现实技术应用于食品工厂机械与设备教学当中,设计虚拟拆装软件,让学生更直观地理解食品机械的工作原理,更清晰地掌握食品机械的机械结构提升课堂教学效果。     

基于虚拟现实的实验室管理系统设计

结合虚拟现实技术设计了基于虚拟现实的实验室管理系统.系统采用C/S与B/S相结合的混合结构,可实现教学与实验管理、实验员监控管理和开放实验申请与查询的功能,从而降低了实验室管理的强度.     

基于LabVIEW的多功能虚拟示波器的设计与实现

针对传统示波器只能显示和测量信号的问题,利用LabVIEW的图形化编程语言,采用模块化设计思想,设计了一款多功能虚拟示波器.该示波器不仅具有普通示波器的基本功能,还具有信号测量、信号运算、滤波处理和频谱分析功能.对虚拟示波器的测试结果表明,该虚拟示波器运行可靠、性能良好,能满足正常的使用需求.     

基于虚拟仿真系统的翻驳领结构的数字化修正

翻驳领由翻领和驳领两部分组成.翻驳领的造型变化需要遵循其内在规律,旨在表现程式之美.影响翻驳领造型的因素很多,在结构上翻折松量值、倒伏量、驳口线斜率、领座高度和翻领宽度的差值等均影响外观质量.引入CLO3D数字化设计系统对西装驳领结构的整体美观度、驳领平整度、翻领圆顺度、翻领内口贴合度和翻领外口贴合度进行评价,并结合客...     

基于服装迁移的二维虚拟试衣技术

为实现低成本的虚拟试衣,针对传统方法难以应用于实际场景的问题,提出了一种基于服装迁移的二维虚拟试衣网络。通过输入用户图像和模特图像,该网络能够生成用户穿着模特服装的试衣效果。首先通过纹理重映射提取服装纹理,再通过人物解析迁移提取用户纹理,然后合并服装纹理和用户纹理得到一个粗糙的试衣结果,最后基于半监督学习对粗糙结果中的纹理缺失区域进行自动修复,得到最终的试衣结果。定性和定量的实验均证明本文提出的方法能够较好地保留服装的纹理细节,维持用户的身份信息不发生改变,并且能够生成良好的试衣结果。     

服装二维裁片虚拟模拟技术

在三维服装虚拟缝合及试衣过程中,服装2-D裁片虚拟模拟是关键技术之一。应用服装CAD软件绘制服装纸样并存储成DXF格式,通过DXF文件接口程序将纸样载入系统。采用正则栅格法对裁片进行四边形剖分,连接四边形对角线完成对2-D裁片的三角网格化。以三角形顶点为质点、三角形边为弹簧,构建裁片质点-弹簧模型,通过模型受力分析、数值求解完成对2-D裁片的虚拟模拟。以男士背心为例,通过裁片网格剖分实验验证正则栅格法的有效性;同时完成对背心裁片自然下落于桌面和背心虚拟缝合效果模拟。     

虚拟仪器在织物纬斜检测中的应用

由于微处理器功能的限制,传统的织物纬斜检测装置难以对大量的历史数据进行综合分析。为此采用美国国家仪器公司的虚拟仪器技术对传统装置进行改进,使用计算机代替微处理器,通过数据采集模块采集织物纬斜数据,使仪器在实现织物纬斜检测任务的同时,对所测数据进行分析处理,从而进一步研究织物纬斜存在的规律。经过多次实验发现,改进后的纬斜检测装置实现了对纬斜、纬弯的在线检测和处理,可以综合利用测试数据对织物的纬斜规律进行总结。     

小型立体仓库虚拟样机与运动仿真分析

利用虚拟样机技术,采用三维建模软件PRO/E在计算机中建立小型立体仓库的虚拟模型,详细介绍了其运动学分析过程,为工程人员提高设计效率和避免差错及缩短设计周期提供了思路。     

基于SketchUp的农产品食品实训基地 三维虚拟构建

目的虚拟现实技术是一门新兴技术,在各个领域的应用越来越广。为进一步提高农产品食品实训基地的地理信息量,丰富实训基地的展示手段,拟采用先进的三维建模技术,构建实训基地的三维虚拟场景。方法结合数字化时代的三维虚拟技术,以浙江经贸职业技术学院农产品食品实训基地为研究对象,探讨基于Sketch Up软件的实训基地三维模型和场景的构建方法、技术路线和建模流程。结果开发了三维模型和可视化虚拟场景,对实训室总体建筑布局、检测室内部空间和检测仪器设备进行虚拟展示。结论 Sketch Up软件可以提供一种多视角的三维虚拟实训室解决方案,具有简单易学,可操作性强和流程化的特点,是一种非常实用的三维建模工具。项目研究可为高校虚拟实训室的建设提供有益的参考和借鉴。     

虚拟样机技术在织机隔振器设计中的应用研究

介绍了虚拟样机技术，在对织机隔振器系统动力学分析的基础上，利用ADAMS软件，开发出了隔振器虚拟样机，并研究了其动态特性，对阻尼和刚度参数进行了优化设计，为隔振器物理样机设计提供理论支持。     

Ecological network analysis on global virtual water trade

Global water interdependencies are likely to increase with growing virtual water trade. To address the issues of the indirect effects of water trade through the global economic circulation, we use ecological network analysis (ENA) to shed insight into the complicated system interactions. A global model of virtual water flow among agriculture and livestock production trade in 1995-1999 is also built as the basis for network analysis. Control analysis is used to identify the quantitative control or dependency relations. The utility analysis provides more indicators for describing the mutual relationship between two regions/countries by imitating the interactions in the ecosystem and distinguishes the beneficiary and the contributor of virtual water trade system. Results show control and utility relations can well depict the mutual relation in trade system, and direct observable relations differ from integral ones with indirect interactions considered. This paper offers a new way to depict the interrelations between trade components and can serve as a meaningful start as we continue to use ENA in providing more valuable implications for freshwater study on a global scale.     

虚拟现实技术在服装手工印染图案设计中的应用

分析了虚拟现实技术在服装手工印染图案设计中面临的问题,提出其在服装手工印染图案设计中的应用策略.研究了虚拟现实技术下传统服装手工印染图案设计的要素,并提出其在各要素中的应用方案.分析虚拟现实技术在服装手工印染图案设计的各个阶段,找到其在各个阶段的应用策略.     

基于虚拟仿真的服装缝制流水线优化

服装缝制流水线不同于一般的直线流水线,在实际生产中必定存在逆工序,因而采用常见的优化目标不一定能达到最终优化目标———生产时间最短。提出直接以生产时间最短为工序编排的优化目标,并用遗传算法来进行流水线优化设计,以虚拟流水生产过程记时得到生产时间,最后用MatLab进行实例编程计算验证其可行性。