移动平台三维花卉植物触摸反馈可视化模拟

虚拟现实领域中,人们对三维花卉植物可视化及交互感的需求越来越强烈,而触摸力度引起的植物受力形变过程又无法采用现有的植物运动形变方法进行模拟,因为现有方法造成了模拟失真,交互感差。根据植物整株交互需求或单一叶片受力情况,分析不同方式的运动反馈模拟方法,先判断受力情况,根据动力学原理模拟整株受力,根据触摸屏获取数据,结合叶脉骨架旋转模型算法计算出单一叶片因受力而发生的形变,不需手动输入参数,就能模拟不同力度触摸造成的叶片形变。本方法应用在移动平台后,真实感和帧速率情况良好,可视化和交互感大大提升,并可推广到同类结构的物体模拟。     

Puzzle: A mobile application development environment using a jigsaw metaphor

ObjectiveCreate a visual mobile end user development framework, named Puzzle, which allows end users without IT background to create, modify and execute applications, and provides support for interaction with smart things, phone functions and web services.MethodsDesign of an intuitive visual metaphor and associated interaction techniques for supporting end user development in mobile devices with iterative empirical validation.ResultsOur results show that the jigsaw is an intuitive metaphor for development in a mobile environment and our interaction techniques required a limited cognitive effort to use and learn the framework. Integration of different modalities and usage of smart things was relevant for users.ConclusionPuzzle has addressed the main objective. The framework further contributes to the research on mobile end user development in order to create an incentive for users to go beyond consuming content and applications to start creating their own applications.PracticeUsage of a mobile end user development environment has the potential to create a shift from the conventional few-to-many distribution model of software to a many-to-many distribution model. Users will be able to create applications that fit their requirements and share their achievements with peers.ImplicationsThis study has indicated that the Puzzle visual environment has the potential to enable users to easily create applications and stimulate exploration of innovative scenarios through smartphones.     

分析审美经验进行计算机交互界面的设计

计算机界面的设计中交互设计不仅关乎视觉,也关乎触觉和过程体检。分析其独特的审美经验,可以得到计算机互动网站设计应依据的技术美学特点,依据这些特点,利用互动产品审美经验可以更好的进行交互性的界面设计。     

基于因特网的远程控制系统设计

本文首先介绍了基于因特网的远程控制系统的体系结构和系统中的网络数据库关键技术,对多用户同时操作问题、Web客户端／服务器端动态交互的实现、Winsock网络实时传输通信的设计等部分进行了详细的分析设计,确定了系统使用的控制网络与信息网络融合的方法,最后介绍了远程控制系统的网络安全问题。     

基于网络的多媒体课件制作的设计思索

本文论述了网络多媒体教学的特点,提出了多媒体课件制作应该遵循的原则,以及优秀多媒体课件应具备的标准。     

Microstructure of Pd/CeO2 catalyst: Effect of high temperature reduction in hydrogen

The effect of high temperature reduction (HTR) in hydrogen (up to 1180 K) on the microstructure of 9 wt.-% Pd/CeO₂ catalyst was studied by HRTEM and XRD methods. Reduction of the catalyst at or above 973 K caused severe recrystallization of CeO₂ and Pd with simultaneous strong interaction between the two components appearing as three phenomena: epitaxial growth of small Pd particles on CeO₂ (most frequently with [111]Pd[111]CeO₂); decoration of large Pd particles with ordered CeO₂ overlayer and expansion of the lattice parameter of Pd (by 2.1%). The origin of the Pd lattice expansion is discussed and diffusion of Ce species into the Pd lattice seems to be the most probable one. HTR caused also phase transformations in the ceria support. At 973 K and 1100 K, whole CeO₂ was transformed into oxygen deficient CeO_x phase exhibiting the same or similar structure but with expanded lattice parameter (by 2.8%). At 1180 K most ceria was transformed into hexagonal A-Ce₂₃. The CeO_x phase appeared to be stable in hydrogen and in vacuum at room temperature, but upon exposure to air at room temperature it rapidly reoxidised to CeO₂. Ce₂O₃ also reoxidised to CeO₂ but much slower. Another consequence of HTR at or above 773 K was formation of pits in CeO₂ crystallites, mainly on (112)-type crystal faces. The pits (1–10 nm) exhibited well defined walls parallel to CeO₂ lattice fringes and they could possibly constitute nucleation sites for strongly bonded, epitaxial oriented Pd particles.     

合成射流与主流相互作用的数值研究

本文采用动网格技术,利用大涡模拟求解三维N-S方程,对直射流以及倾斜角为30°的斜射流进行了三维数值模拟。数值模拟结果表明:数值模拟的直射流出口速度曲线与理论速度曲线吻合较好,通过直射流与斜射流对比发现,直射流产生的涡环为对称涡环,而斜射流的为不对称涡环;直射流射流出口时均速度影响范围大于斜射流,但是其射流宽度小于斜射流射流宽度。本文还分析了射流与主流的相互作用,数值模拟了不同主流速度下射流的运动状态,结果表明:主流速度为2.0 m/s时,直射流产生的涡环受到主流的作用发生倾斜,斜射流产生的涡环由于主流的作用,变成典型的马蹄涡形式;由于射流对主流的影响,直射流对主流速度起阻碍作用,减缓了边界层及附近主流的速度,斜射流加速了主流边界层内的流体速度,使边界层速度更加饱满;随着主流速度的提高,射流产生的涡环被主流吹扫进入边界层,在壁面上发生破裂,与边界层内流体混合,射流对主流的的影响减弱。     

A large-scale multi-agent system for navy personnel distribution

In the US Navy, at the end of each sailor's tour of duty, he or she is assigned to a new job. The Navy employs some 280 people, called detailers, full time to effect these new assignments. The intelligent distribution agent (IDA) prototype was designed and built to automate, in a cognitively plausible manner, the job of the human detailers. That model is being redesigned to function as a multi-agent system. This is not a trivial matter due to the fact that there would need to be approximately 350 ‐ 000 individual agents. There are also many issues relating to how the agents interact and how all entities involved, including humans, exercise their autonomy. This paper describes both the IDA prototype and the multi-agent IDA system being created from it. We shall also discuss several of the major issues regarding the design, interaction and autonomy of the various agents involved.     

铝熔体中夹杂物和气体的行为

分析了铝熔体中夹杂物和气体的行为，提出了寄生机制，并通过对废争化的研究加以论证，认为气寄生于杂，杂吸附着气，除气必排杂，排杂是除气的基础；采用熔剂过滤净化技术效果显著，应予重视。     

Guided Volume Editing based on Histogram Dissimilarity

Segmentation of volumetric data is an important part of many analysis pipelines, but frequently requires manual inspection and correction. While plenty of volume editing techniques exist, it remains cumbersome and errorprone for the user to find and select appropriate regions for editing. We propose an approach to improve volume editing by detecting potential segmentation defects while considering the underlying structure of the object of interest. Our method is based on a novel histogram dissimilarity measure between individual regions, derived from structural information extracted from the initial segmentation. Based on this information, our interactive system guides the user towards potential defects, provides integrated tools for their inspection, and automatically generates suggestions for their resolution. We demonstrate that our approach can reduce interaction effort and supports the user in a comprehensive investigation for high‐quality segmentations.