CPD-520GS正“像”

Sony香港有限公司的21英寸电脑显示器Multiscan CPD-520GS系列,使用Sony超平面显像管内置地磁、电子束流向和温度三个传感器,在减低光线反射之余更能提供无歪曲的影像,适合家庭及办公室用户使用。对于DTP台式出版系统、CAD/CAM用户、图像设计师及需求高质量的用户,520GS的21英寸大屏幕显示屏更提供了优质清晰的画面。 CPD-520GS与以前的产品相比新增了多项     

IT总监“芯”理财生活

在未来的个人消费领域,企业推出的产品在客户使用之后,会把各种使用数据返回到企业,为企业提供参考,而企业会根据这些信息为用户及时提供针对性的升级服务。所有信息的传递和分析汇总,均需要得到以开放式服务器为依托的IT平台的支持。     

遗传算法在计算机辅助设计中的应用

本文提出了一个基于遗传算法的计算机辅助设计方法，它可以辅助设计师更好地完成概念设计。本研究提供了一个用户接口，让用户为每一个设计方案赋适应度，所以能反映人的喜好。     

UUSee 2012新版本发布

近日国内专业的网络电视收看软件UUSee推出了2012最新版本。新版本软件的绚丽界面风格让用户在使用时清晰明了。其次，软件“聚合”的开放式平台可以为用户提供“海量信息”。另外一个重要特点就是UUSee2012版中开辟了一个叫做“微视”的栏目，这里聚合了信息库中所有的短小视频。     

产品交互设计中的设计方法的研究

交互设计随着互联网时代的兴盛展现了其发展的勃勃生机,尤其在产品设计领域,交互设计逐渐占据了一个重要的角色,影响了用户在使用产品过程中的对产品满意度的评价。产品交互设计师究竟采取什么样的交互设计方法才能设计出令用户满意的交互产品也变得尤为重要。针对不同交互产品,设计师采用的交互设计方法也存在着不同,着重点不同,得到的效果也千差万别。本文主要从交互设计方法中的“基于剧情的设计（scenario-based design）”和“以用户为中心的设计（UCD）”为基础,来探讨这些方法在交互设计中的实际运用。     

开放式数据采集及其标准ODAS

开放式数据采集协会最近颁布了开放式数据采集标准。协从的宗旨是为数据采集的用户提供一个通用、开放的数据采集标准。其目标是使不同厂家所提供的硬件和软件产品具有互操作性。同时本文揭示了未来的数据采集标准将以实现互操作性为目标。     

Mac OS X安全特性

苹果电脑向用户公开源代码，并且使用久经考验的开放式资源软件；开发组首先仔细审查系统的安全措施，敏锐地发现薄弱环节，最后做出改进避免安全漏洞。通过使用这种开放软件开发固有的协作方式，苹果电脑和开放软件工作组能为用户提供一个更安全的系统，以及对安全问题的快速反应。苹果公司和安全监督组织CERT和FIRST紧密合作。     

基于KANO模型非正向指标的老年用品设计研究

文章为解决老年用品功能堆砌的问题,提出一种基于KANO模型非正向指标的需求分析方法,帮助设计师更有针对性地根据用户需求简化产品功能,达到有效控制成本的目的,让产品的使用方式更符合老年人群的认知,使其拥有更适宜的用户体验。借助KANO模型对用户人群进行调查,确定产品功能的反向属性和无差异属性,并结合形态和情感两个维度为产品功能的删减和增强提供依据。     

产品与服务

12月10日,惠普发布了其基于开放式体系架构最新的Powerbar刀片服务器系列产品。该系列服务器能够为电信、金融等行业用户提供高速的互联网访问速度和简单有效的管理方法。刀片式服务器是一种高密度的服务器平台,它专为特殊应用行业和高密度计算机环境设计,在节约服务器的使用空间和费用的同时,能够为用户提供扩展和升级手段。惠普Powerbar服务器中,每个“刀片”都是独立的,分别完成服务器、存储模块、应用模块和网络模块等不同功能。用户只需根据其具体的需求,选择相应的“刀片”,插入扩展槽中,即     

昆腾为客户降低工作负载存储的复杂性

昆腾公司近日宣布推出获得全球领先的开放式平台IP视频管理软件(VMS)提供商Milestone Systems认证的视频监控解决方案。昆腾StorN ext横向扩展存储能够与Milestone XProtect VMS一同使用并已获得认证,从而提供一个可存储大量视频文件同时优化系统性能的整合解决方案。它提高了性能与可扩展性的标准,并为视频监控负载提供标准、易于使用的存储功能。这个整合解决方案让Milestone用户能够同时     

Adaptive Polar-Space Motion Control for Embedded Omnidirectional Mobile Robots with Parameter Variations and Uncertainties

This paper presents an adaptive polar-space motion controller for trajectory tracking and stabilization of a three-wheeled, embedded omnidirectional mobile robot with parameter variations and uncertainties caused by friction, slip and payloads. With the derived dynamic model in polar coordinates, an adaptive motion controller is synthesized via the adaptive backstepping approach. This proposed polar-space robust adaptive motion controller was implemented into an embedded processor using a field-programmable gate array (FPGA) chip. Furthermore, the embedded adaptive motion controller works with a reusable user IP (Intellectual Property) core library and an embedded real-time operating system (RTOS) in the same chip to steer the mobile robot to track the desired trajectory by using hardware/software co-design technique and SoPC (system-on-a-programmable-chip) technology. Simulation results are conducted to show the merit of the proposed polar-space control method in comparison with a conventional proportional-integral (PI) feedback controller and a non-adaptive polar-space kinematic controller. Finally, the effectiveness and performance of the proposed embedded adaptive motion controller are exemplified by conducting several experiments on steering an embedded omnidirectional mobile robot.     

Fragment-based responsive character motion for interactive games

Fragment-based character animation has become popular in recent years. By stringing appropriate motion capture fragments together, the system drives characters responding to the control signals of the user and generates realistic character motions. In this paper, we propose a novel, straightforward and fast method to build the control policy table, which selects the next motion fragment to play based on the current user’s input and the previous motion fragment. During the synthesis of the control policy table, we cluster similar fragments together to create several fragment classes. Dynamic programming is employed to generate the training samples based on the control signals of the user. Finally, we use a supervised learning routine to create the tabular control policy. We demonstrate the efficacy of our method by comparing the motions generated by our controller to the optimal controller and other previous controllers. The results indicate that although a reinforcement learning algorithm known as value iteration also creates the tabular control policy, it is more complex and requires more expensive space–time cost in synthesis of the control policy table. Our approach is simple but efficient, and is practical for interactive character games.     

Neuro-fuzzy control of a robotic exoskeleton with EMG signals

We have been developing robotic exoskeletons to assist motion of physically weak persons such as elderly, disabled, and injured persons. The robotic exoskeleton is controlled basically based on the electromyogram (EMG) signals, since the EMG signals of human muscles are important signals to understand how the user intends to move. Even though the EMG signals contain very important information, however, it is not very easy to predict the user's upper-limb motion (elbow and shoulder motion) based on the EMG signals in real-time because of the difficulty in using the EMG signals as the controller input signals. In this paper, we propose a robotic exoskeleton for human upper-limb motion assist, a hierarchical neuro-fuzzy controller for the robotic exoskeleton, and its adaptation method.     

基于运动控制芯片的舞台吊杆同步控制方法的研究

文中提出了一种基于精密运动控制芯片的舞台吊杆同步控制方法。以ARM微处理器作为核心部件,应用LM628运动控制芯片,将每根吊杆都按照相同的运动轨迹运行的控制方法,代替了传统的多根吊杆之间相互比对的同步控制方法。采用这种方法设计的系统结构简单,稳定可靠,实时性、动态性能较好,能够较好地解决舞台吊杆的动态同步控制问题,为舞台吊杆的控制提供了新技术、新方法。     

无人机集群的微分平坦性与编队控制研究

本文研究了无人机集群的微分平坦性,给出了相对运动的微分平坦映射,并以此为基础设计了分布式编队控制器.运动规划方面,通过求解受约束的优化问题,实时生成期望编队轨迹和编队构型.运动控制方面,采用微分平坦映射将运动指令映射为每架无人机的期望状态和控制输入,而后利用局部误差反馈设计分布式编队控制器跟踪期望运动轨迹.针对群体运动的稳定性问题,本文运用李雅普诺夫稳定性理论证明了闭环系统的稳定性,给出了控制参数的选取条件.最后仿真验证了编队控制方法在未知环境下的运动控制效果.     

台达运动控制器在食品和医药行业中的应用

本文主要介绍了台达高性能网络型运动控制器DVP-10MC在食品和医药行业中的运用。DVP-10MC是台达自主研发的一款基于CANopen现场总线的多轴运动控制器,支持多种协议,极大地方便使用者对项目进行快速开发。其标准的轮切和飞剪功能库函数以及丰富的凸轮函数可以满足食品包装以及医药同步灌装的应用需求。     

台达运动控制器在食品和医药行业中的应用

本文主要介绍了台达高性能网络型运动控制器DVP—IOMC在食品和医药行业中的运用。DVP-10MC是台达自主研发的一款基于CANopen现场总线的多轴运动控制器，支持多种协议，极大地方便使用者对项目进行快速开发。其标准的轮切和飞剪功能库函数以及丰富的凸轮函数可以满足食品包装以及医药同步灌装的应用需求。     

细长柔性空间结构几种动力学模型的比较

对于自由-自由边界的大型柔性梁式空间结构在轨搬运过程中,其大范围刚体运动和柔性振动会相互耦合,是一类典型的刚柔耦合动力学问题.建立相对准确的动力学模型是设计良好控制系统的前提,但现有文献在研究该问题时却采用了忽略刚柔耦合作用的动力学模型并依此设计控制器,因此有必要建立耦合模型,并探讨其与非耦合模型之间的区别和适用性.首先针对结构自身运动特点选择以瞬时质心为原点的浮动坐标系作为辅助坐标系,将结构两类不同的运动形式进行分解,并利用其产生的附加约束条件简化虚功表达式;其次选择Euler-Bernoulli梁变形形式描述结构变形并采用假设模态法对变形进行变量分离;基于虚功原理推导得到结构大范围运动的刚柔耦合动力学模型;通过仿真算例1对非耦合模型、零次近似模型和一次近似模型进行了对比,验证了非耦合模型的不合理性及零次近似简化模型的准确性和有效性;通过仿真算例2对零次近似简化模型和一次近似模型的对比,说明了二者的使用范围;仿真对比为后续的运动控制系统设计和振动抑制研究提供了依据.     

Electromyography-based control of active above-knee prostheses

This paper presents a new electromyography (EMG)-based control approach for above-knee (AK) prostheses, which enables the user to control the prosthesis motion directly with his or her muscle activating neural signals. Furthermore, the unique ‘active-reactive’ control structure mimics the actuation mechanism of a human biological joint, and thus provides the user an experience similar to that of a biological lower limb in the control process. In the proposed control approach, surface EMG is utilized to provide a non-intrusive interface to the user's central nervous system, through which the muscle-activating signals can be obtained. With the EMG signals as inputs, an ‘active-reactive’ control algorithm is developed based on the analysis on a simplified musculoskeletal structure of human biological joint. This control algorithm incorporates an ‘active’ component, which reflects the user's active effort to actuate the joint, and a ‘reactive’ component, which models the reaction of the joint to the motion as a result of the controllable impedance displayed on the joint. With this unique structure, the controller enables the active control of the joint motion, while at the same time achieves a natural interaction with the environment through the modulation of the joint impedance. The effectiveness of the proposed control approach was demonstrated through a set of free swing experiments, in which the user was able to control the prosthesis to follow arbitrary motion commands, and a set of level walking experiments, in which the user achieved natural walking gait similar to the typical walking gait of healthy subjects.     

Retrieval and Visualization of Human Motion Data via Stick Figures

We propose 2D stick figures as a unified medium for visualizing and searching for human motion data. The stick figures can express a wide range or human motion, and they are easy to be drawn by people without any professional training. In our interface, the user can browse overall motion by viewing the stick figure images generated from the database and retrieve them directly by using sketched stick figures as an input query. We started with a preliminary survey to observe how people draw stick figures. Based on the rules observed from the user study, we developed an algorithm converting motion data to a sequence of stick figures. The feature‐based comparison method between the stick figures provides an interactive and progressive search for the users. They assist the user's sketching by showing the current retrieval result at each stroke. We demonstrate the utility of the system with a user study, in which the participants retrieved example motion segments from the database with 102 motion files by using our interface.