Emotion model of interactive virtual humans on the basis of MDP

Emotion plays an essential role in the adaptation and social communication of organisms. Similarly, an appropriately timed and clearly expressed emotion is a central requirement for believable interactive virtual humans. Presently, incorporating emotion into virtual humans has gained increasing attention in the academia and industry. This strong interest is driven by a wide spectrum of promising applications in many areas such as virtual reality, e-learning, entertainment, etc. This paper introduces an emotion model of artificial psychology, in which the transition of emotion can be viewed as a Markov process and the relation of emotion, external incentive and personality can be described by a Markov decision process (MDP). In order to demonstrate the approach, this paper integrates the emotion model into a system composed of voice recognition and a realistic facial model. Thus, the model could be used for generating a variety of emotional expressions of autonomous, interactive virtual human beings.     

基于Google Earth的输电线路巡视无人机地面站监控系统

通过研究Google Earth电子地图的GIS二次开发技术,构造了无人机地面站电子地图显示与交互环境,结合无人机的物理-数学模型,定制无线数据通信协议,在Google Earth视图中对无人机进行三维飞行仿真和航迹实时跟踪显示,实现了地面站对空中无人机执行输电线路巡视飞行姿态和航路的全过程实时监控。     

智能变电站基于IEC 61850服务跟踪模型研究

对IEC 61850标准第2版中定义的服务跟踪模型进行了分析和研究.对与跟踪服务模型相关的逻辑节点类、公共数据类、功能约束、数据对象以及数据属性进行了简要的阐述.并以缓存报告控制块访问服务跟踪为例,将服务跟踪模型在其中的应用进行重点介绍,介绍了其工作流程、服务特点和实现目标.通过对服务跟踪模型的研究,有助于解决数字化变电站内信息交互异常的问题,并且提供相关研究依据和具体研究方法的指导.     

基于GPU的三维人脸数据动态线性快速修复

基于CUDA和Open GL,根据三维人脸的深度与灰度数据构造三维点云模型,在更短的时间内显示具有逼真效果的三维人脸模型,并根据传统三维人脸点云显示对数据采集要求较高的缺陷,提出了一种用于修补低质量三维采集数据中出现的空洞现象的动态线性修复方法并使用GPU为算法进行了加速。该方法从人脸数据集中读取点云数据,逐行扫描寻找点云数据中出现的空洞并使用符合人脸本质特征的线性插值方式修补空洞。实验证明,该方法能得到远好于传统点云显示的效果,且经过GPU加速后显示效率得到大幅提高。     

基于TC35i的企业内网短信交互平台的设计

针对电力企业内网各类信息发布系统普遍存在信息送达不及时的问题,文章在研究TC35i短信模块的基础上进行二次开发,提出了一种基于Web技术和GSM短信技术的电力企业内网短信交互平台的总体设计方案,解决了企业发布内部信息时,外勤或出差用户无法及时查看内网信息的问题。分析了SMS的工作步骤、PDU格式编码的实现、短信控制方面的AT指令集等,给出一个基于TC35i短信模块实现内网信息发布系统的案例,员工不仅可以随时随地获知企业发布的信息,还可以通过短信进行信息交互,提高了工作效率。     

Real-time direct volume rendering in functional magnetic resonance imaging

Direct volume rendering is a visualization method that allows display of all information hidden in three-dimensional data sets of, for example, computed tomography or magnetic resonance imaging (MRI). In contrast to commonly used surface rendering methods, these algorithms need no preprocessing but suffer from a high computational complexity. A real-time rendering system, VIRIM (Vitec: Visualization Technology GmbH, Mannheim, Germany), cuts down rendering times of minutes on normal workstations to an interactive rate of 1 second or less. The immediate visual feedback allows interactive steering of the visualization process to achieve insight into the internal three-dimensional structure of objects. Additional information is obtained by using an interactive gray-value segmentation tool that both allows segmentation of the data set according to bone, tissue, and liquor and display of multifunctional data sets (e.g., functional MRI [fMRI] data sets). Thus, real-time direct volume rendering allows segmentation and volume data processing of functional and anatomical MR data sets simultaneously. As this method can be integrated in the clinical routine, it is of great importance for real-time motion artifact detection and the interpretation of fMRI data acquired during cognitive experiments with normal subjects and psychiatric patients. Because of the free programmability of VIRIM, more complex matching procedures are currently being investigated for future implementation.     

涵盖分布式新能源业务的营销服务体系研究

通过调研深入分析和研究了分布式新能源各主体的业务需求,利用移动互联网技术和大数据等先进信息通信技术,以客户为中心,从社会化服务框架、定制化服务内容和跨界信息化服务平台3个角度构建了涵盖分布式新能源各业务主体在内的新型营销信息化服务体系。其中,基于新能源运营数据信息和调研结果,研究并建立了面向各相关业务主体的社会化服务框架;根据研究得到的社会化服务框架和调研分析结果,设计了针对各业务主体的定制化服务内容;最后,基于大数据技术及各业务主体互动沟通的需要,构建了包含互动服务渠道和互动服务内容在内的跨界信息化服务平台,为相关社会主体提供快捷、流畅、愉悦兼具个性化的服务,满足了多变的市场需求。     

基于TMS320LF2407的电能质量监测器

介绍了一种以TMS320LF2407DSP为核心的电能质量监测器及其软硬件的设计.该电能质量监测器能够对三相电压、电流信号实时测量, 具有事件记录、故障报警和故障波形跟踪记忆,分析监测结果,同时具有远程通信接口和人机交互功能.软件设计采用实时多任务操作系统作为运行平台,在运行中保证采样,计算,控制,通信,显示等任务按时,有序,高效的完成.目前,该样机已经基本设计完成,运行结果已经基本达到要求.     

基于深层图卷积的EEG情绪识别方法研究

针对浅层图卷积提取的局部脑区空间关联信息对情感脑电表征不足的问题,本文提出了一种深层图卷积网络模型。该模型利用深层图卷积学习情绪脑电全局通道间的内在关系,在卷积传播过程中应用残差连接和权重自映射解决深层图卷积网络面临的节点特征收敛到固定空间无法学习到有效特征的问题,并在卷积层后加入PN正则化扩大不同情绪特征间的距离,提高情绪识别的性能。在SEED数据集上进行实验,与浅层图卷积网络相比准确率提高了0.7%,标准差下降了3.15。结果表明该模型提取的全局脑区空间关联信息对情绪识别的有效性。     

Circuit Master: turnkey software for the introductory electricalengineering curriculum

A turnkey software system for the introductory electrical engineering curriculum is described in detail from a user's perspective. The system, Circuit Master, provides a structured, interactive, menu-driven environment that allows students to explore basic concepts in circuit and signal theory without requiring a background in computer programming. The system's interactive user interface and visual presentation format simultaneously display relationships between circuit components, pole-zero patterns. Bode plots, initial conditions, input/output signal waveforms, and input/output signal spectra for periodic and aperiodic signals. Simultaneous display of information for two sets of circuit components allows physical relationships, parametric changes, and sensitivity issues to be examined easily     

电液伺服系统的神经网络在线自学习自适应控制

针对电流伺服系统的复杂非线性和不确定性特性,提出了一种基于神经网络的在线自学习自适应控制策略,引入的神经网络模型可跟踪学习系统的时为动力学,控制器的设计依赖于系统的先验知识,控制参数的调整是基于被控过程的测量信息利用反馈误差学习算法实现的,该系统已应用大于型电液伺服结构试验机的控制,显示了优良的控制品质。     

Teaching computer science with virtual worlds

The ProgrammingLand MOOseum of Computer Science is a multiuser virtual environment hosted on the Internet. It is built on a model of exploratory, spatially oriented immersion, where visitors learn principles of computer science as they journey through the content. The MOOseum is divided into "wings" that are devoted to particular programming languages and is populated with an array of interactive objects and agents that facilitate an active learning experience. This paper describes the environment and the effort to integrate it into the curriculum.     

原子力显微镜的分数阶PID控制设计

原子力显微镜(AFM)是测量材料物体表面形貌的重要工具。为了实现AFM的高速扫描成像,设计一种基于分数阶前馈-反馈PID控制算法的AFM扫描成像控制器。将分数阶迭代学习控制(FOILC)用于前馈回路,在跟踪过程中对当前周期的误差信息进行学习,实现输出沿迭代轴的快速收敛;在反馈回路中采用分数阶比例积分(FOPI)控制增加高速成像时的精度。轨迹跟踪仿真和实验成像结果表明,该算法能有效提高AFM成像速度和改善系统非线性的影响,在扫描频率为25 Hz时,控制精度达到10~(-5)量级,AFM成像质量得到显著提高。     

A Multi-scale Attention-based Facial Emotion Recognition Method Based on Deep Learning

Recently, people have been paying more and more attention to mental health, such as depression, autism, and other common mental diseases. In order to achieve a mental disease diagnosis, intelligent methods have been actively studied. However, the existing models suffer the accuracy degradation caused by the clarity and oc-clusion of human faces in practical applications. This paper, thus, proposes a multi-scale feature fusion network that obtains feature information at three scales by locating the sentiment region in the image, and integrates global feature information and local feature information. In addition, a focal cross-entropy loss function is designed to improve the network''s focus on difficult samples during training, enhance the training effect, and increase the model recognition accuracy. Experimental results on the challenging RAF_DB dataset show that the proposed model exhibits better facial expression recognition accuracy than existing techniques.     

Simulation of Crowd Motion Based on Boids Flocking Behavior and Social Force Model

In the process of crowd movement, pedestrians are often affected by their neighbors. In order to describe the consistency of adjacent individuals and collectivity of a group, this paper learns from the rules of the flocking behavior, such as segregation, alignment and cohesion, and proposes a method for crowd motion simulation based on the Boids model and social force model. Firstly, the perception area of individuals is divided into zone of segregation, alignment and cohesion. Secondly, the interactive force among individuals is calculated based upon the zone information, velocity vector and the group information. The interactive force among individuals is the synthesis of three forces: the repulsion force to avoid collisions, the alignment force to keep consistent with the velocity direction, and the attractive force to get close to the members of group. In segregation and alignment areas, the repulsion force and alignment force among pedestrians are limited by visual field factors. Finally, the interactive force among individuals, the driving force of destination and the repulsion force of obstacles work together to drive the behavior of crowd motion. The simulation results show that the proposed method can not only effectively simulate the interactive behavior between adjacent individuals but also the collective behavior of group.     

Engineering and the law [custodians of information]

The control of valuable technical information determines its beneficiaries. The “owner” may exploit the information for a profit or share it with colleagues and the general public. When used for a profit, benefits focus on monetary considerations and the narrower interests of the “owner” of the information. When information is in the public domain, benefits extend to everyone. Information, of course, exists whether there is an “owner” or not. Until discovered, information “belongs” to everyone but can be used by no one. After discovery, the ownership of the information does not change, but who can use it does. Thus, one who discovers information becomes its first custodian, but not its owner. In his thoughtful “GNU Manifesto” (1985), Professor Richard Stallman, a well-known computer scientist, points out that the desire to be rewarded for one's creativity does not justify depriving the world of that creativity, and that creativity is a social contribution only insofar as society is free to use the results. Indeed, if the initial custodians of valuable information deserve to be rewarded for their creativity, they also deserve to be punished if they restrict the use of it. Nevertheless, most legal systems recognize at least 3 methods for the control of information. Trade-secret law recognizes the right of the first custodian of information to keep the information secret and be protected from misappropriation by a subsequent custodian of the same information. The first custodian of information comprising a significant advance in a useful art is permitted to use the information as embodied in the specific advancement exclusively for a period of time in return for disclosing it promptly to the public in a patent     

天津电力IMS深化提升探讨与研究

随着SG186工程的竣工与信息化建设的深入推进,在信息内网,公司已经完成信息运维综合监管系统（以下简称IMS）的一期建设,实现了对内外网IT资源统一监控的规划目标。为了更好地配合国家电网公司信息化建设部署要求,在稳定运行IMS的基础上进一步开展了深化应用。对于系统在功能应用和展示效果的局限性上。国网天津市电力公司进行了深入的指标地市拆分工作。同时将考核指标进行纵向动态追踪和可视化展示,并起到了预期的效果。在提升企业领导决策水平的同时,给综合监管工作提供了更有力和全面的保障,实现了信息化与公司战略发展的深度融合。     

Graphical tactile displays for visually-impaired people.

This paper presents an up-to-date survey of graphical tactile displays. These devices provide information through the sense of touch. At best, they should display both text and graphics (text may be considered a type of graphic). Graphs made with shapeable sheets result in bulky items awkward to store and transport; their production is expensive and time-consuming and they deteriorate quickly. Research is ongoing for a refreshable tactile display that acts as an output device for a computer or other information source and can present the information in text and graphics. The work in this field has branched into diverse areas, from physiological studies to technological aspects and challenges. Moreover, interest in these devices is now being shown by other fields such as virtual reality, minimally invasive surgery and teleoperation. It is attracting more and more people, research and money. Many proposals have been put forward, several of them succeeding in the task of presenting tactile information. However, most are research prototypes and very expensive to produce commercially. Thus the goal of an efficient low-cost tactile display for visually-impaired people has not yet been reached.     

Fully distributed tracking control for non‐identical multi‐agent systems with matching uncertainty

This article addresses the fully distributed consensus tracking control problem of linear multi‐agent systems with parameter uncertainties. First, a new class of distributed protocol, based on the relative states of neighbors, is proposed. Theoretical analysis indicates that the considered problem can be solved if the control gain constant of the protocol is larger than the norm bound of the leader's nonlinear inputs. Furthermore, a distributed adaptive control protocol is proposed for the case without available global information. The distributed consensus tracking control problem of uncertain linear multi‐agent systems is solved based only on local information under the proposed adaptive protocol. Finally, an application in low‐Earth‐orbit satellite formation flying is provided to illustrate the theoretical results. Copyright © 2014 John Wiley & Sons, Ltd.     

有轨电车激光雷达障碍物探测的决策方法

针对有轨电车在高速行驶过程中遇到障碍物会造成严重事故,提出了一种新的基于激光雷达的有轨电车障碍物探测决策方法.首先对激光雷达收集到的数据通过霍夫变换查找到路面与障碍物的交接点;再通过卡尔曼滤波器完成对此点的跟踪;最后使用交互式多模型的算法(the interactive multiple model algorithm,IMM),得出前方存在障碍物的可能性再与预先设定的阈值比较,准确判断出电车的行驶状态和障碍物的位置.通过搭建仿真模型,验证出该算法具有良好的可靠性和鲁棒性.