An interaction model between human and system for intuitive graphical search interface

Our objective was to propose a new model which provides real interactions like human conversations. In this paper, we defined “interaction” to mean not only superficial interactions between human and systems but also internal elements inspiring one another. We proposed a new interaction model by defining four user elements namely user knowledge, information needs, thinking, and  feelings, and five system elements namely system knowledge, interaction algorithm, knowledge base, retrieval algorithm, and database. The key point is that users can understand inside the systems gradually and operate them flexibly in their own way to provide real interactions where users and systems inspire one another’s internal elements. We then defined system requirements to realize this model so that users can change and comprehend system knowledge and that users interact with the system constantly. We constructed an image retrieval system applying our proposed graphical search interface named Concentric Ring View and confirmed that all system requirements were satisfied. In a usability test with 12 university students, we confirmed that the proposed interaction model provided intuitive searches to users by inspiring internal elements between users and systems. Users could continuously change and comprehend system knowledge, synchronize user knowledge, shifting thinking and feeling, and changing information needs.     

People tracking based on motion model and motion constraints with automatic initialization

Human motion analysis is currently one of the most active research topics in computer vision. This paper presents a model-based approach to recovering motion parameters of walking people from monocular image sequences in a CONDENSATION framework. From the semi-automatically acquired training data, we learn a motion model represented as Gaussian distributions, and explore motion constraints by considering the dependency of motion parameters and represent them as conditional distributions. Then both of them are integrated into a dynamic model to concentrate factored sampling in the areas of the state-space with most posterior information. To measure the observation density with accuracy and robustness, a pose evaluation function (PEF) combining both boundary and region information is proposed. The function is modeled with a radial term to improve the efficiency of the factored sampling. We also address the issue of automatic acquisition of initial model pose and recovery from severe failures. A large number of experiments carried out in both indoor and outdoor scenes demonstrate that the proposed approach works well     

基于3D CAD模型的设计结构矩阵自动化生成系统

设计结构矩阵DSM已成为许多研究和实践领域中复杂系统建模和分析的工具。但是,DSM的构建却面临很大的困难,因为每个产品的分解和结构关系可以有不同的解释,因此不能以标准模式构建。这使得DSM的快速生成难以实现,从而延长了产品设计周期。介绍了一种基于CAD模型的DSM自动生成系统。首先,使用SolidWorks API提取SolidWorks平台中CAD模型的结构特征树中的顶层部件的Mates特征信息,并将其按特定顺序排列并存储在数据库中。其次,分析组装的部件之间的几何关系,以确定各种配合的类型对部件之间的连接关系的影响程度,并建立了相应的分析和比较规则。最后,使用Visual Basic成功完成了DSM自动生成系统的设计。同时,本文以一些CAD模型为例,验证了所开发系统的可行性和可靠性。     

A basic study for a robotic transfer aid system based on human motion analysis

A metal hydride (MH) actuator uses the reversible reaction between heat energy and mechanical energy of a hydrogen-absorbing alloy and moves smoothly without any noise. Moreover, the actuator is compact, light and has adequate compliance. In this paper, some experiments concerning human motion patterns were carried out in order to adopt the MH actuator to the transfer aid system. The results were evaluated from a biomedical engineering viewpoint in order to obtain the optimal parameters for transferring the disabled from a bed to a wheelchair and vice versa (transfer aid). Sagittal plane kinematics, surface electromyographic signals (EMG) obtained from lower limbs, ground reaction forces and foot pressure distribution were measured using a three-dimensional motion analyzer. From the experimental results, it was found that the motion of the transfer aid was smooth when the initial angle of the ankle was 70°. The best initial angle of the trunk was also found to be about 45° while standing from a bed. However, the initial angle of the trunk was best at 60° when a person was in the process of sitting down on a wheelchair. Furthermore, a knee pad which supports the lower limbs requires flexibility in the range of 0.1-0.2 kgf/mm.     

Designing a camera placement assistance system for human motion capture based on a guided genetic algorithm

Virtual Reality - In multi-camera motion capture systems, determining the optimal camera configuration (camera positions and orientations) is still an unresolved problem. At present, configurations...     

An automatic aperture detection system for LED cup based on machine vision

In order to improve the effectiveness of aperture detection and enhance the competitiveness of enterprise, an automatic inspection system for detecting the aperture of Led cup is developed in the paper. The proposed system can achieve detecting the aperture and separating the unqualified Led cups robustly. Specifically, efficient approaches based on three-point circle fitting and convolutional neural network (CNN) are proposed to achieve automatic aperture detection. Then, a novel control unit is designed to separate the unqualified Led cups using the gas claw and air cylinder. Experimental results demonstrate that the detecting accuracy of the developed system can well meet the requirements of manufacturing enterprise. Moreover, the proposed system can greatly save time and labor costs for enterprises. In addition, with this system we can efficiently construct a vision big data of LED cups. Using such a vision big data, problems of the production line can be timely discovered, and the production quality will be greatly improved.     

Occupant model for human motion

A two-dimensional model of a human being has been developed for display on a computer graphic terminal. The model was designed for use with the simula program which predicts the positions of an occupant within a vehicle cabin during a crash. However, the model can also be used in the simulation of other human motions, such as walking, etc.Also presented is the design of a simple device to automatically generate movies from a terminal screen. Triggered by the bell on the terminal, one frame is taken of each position of any time-varying event, thus creating a movie depicting simulated motion.     

基于高斯背景模型的红外人体运动目标检测技术

针对红外监控中人体运动目标的空洞和拖尾问题,提出了一种基于高斯模型的运动目标检测方法。首先,介绍了红外图像的预处理;其次通过与其他经典的人体运动目标检测算法比较与综合,引入高斯模型,建立背景图像的自适应模型。该种模型主要使用了拟合修正的方法处理了红外监控背景图像中的差分信息,过滤图像中的噪声等相关外部环境干扰因素,从而更新红外图像中的背景信息,提高了红外监控系统图像中人体运动目标的检测清晰度,并进一步提高了红外监控图像的精度。同时,还对该方法进行了必要的仿真实验。仿真结果表明,提出的方法可以准确地检测红外监控图像中的人体运动目标,较好地避免了人体运动速度过快或过慢所产生的拖尾或空洞现象。     

一种基于参考模型的GPDSP指令流控自动验证方法

随着科学计算和人工智能算法复杂度的增加,作为硬件设计中的控制中心,指令流控部件的设计面临复杂性和精确性急剧提升的挑战.FT-xDSP是国防科技大学自主研发的一款64位GPDSP处理器,其指令流控部件的设计规模和复杂性大幅增加,使得指令流控部件的验证成为一个突出难题.提出一种基于指令重排参考模型的指令流控自动化验证方法:首先,以指令输入输出关系为主要特征建立流控部件的抽象模型,屏蔽了内部复杂逻辑,在保证分析结果准确性的基础上降低了分析复杂度;其次,通过自动生成带约束的随机测试激励,对参考模型和待测设计结果进行自动化比较分析,在验证代价相当的情况下提升了代码覆盖率和功能覆盖率.实验和实际应用结果表明,该方法能针对指令流控验证中的薄弱点进行定向随机验证,大幅度提升了指令流控部件的验证效率和验证完整性.     

一种基于参考模型的GPDSP指令流控自动验证方法

随着科学计算和人工智能算法复杂度的增加,作为硬件设计中的控制中心,指令流控部件的设计面临复杂性和精确性急剧提升的挑战.FT-xDSP是国防科技大学自主研发的一款64位GPDSP处理器,其指令流控部件的设计规模和复杂性大幅增加,使得指令流控部件的验证成为一个突出难题.提出一种基于指令重排参考模型的指令流控自动化验证方法:首先,以指令输入输出关系为主要特征建立流控部件的抽象模型,屏蔽了内部复杂逻辑,在保证分析结果准确性的基础上降低了分析复杂度;其次,通过自动生成带约束的随机测试激励,对参考模型和待测设计结果进行自动化比较分析,在验证代价相当的情况下提升了代码覆盖率和功能覆盖率.实验和实际应用结果表明,该方法能针对指令流控验证中的薄弱点进行定向随机验证,大幅度提升了指令流控部件的验证效率和验证完整性.     

An interactive graphical aided scheduling system

Job-shop master scheduling is typically a time consuming, manual iterative design process were the shop scheduler must resolve resource allocation conflicts against multiple, noncommensurate objective. Further, such resolutions must be achieved in a highly dynamic, time constraint environment. The most common and widely employed aids for planning, generating and maintaining schedules are paper, pencil, and the gantt chart. The author proposes a computer based interactive graphical aid which can provide data of computational analysis in forms more compatible with the needs and environment of the production scheduler.     

An automatic,continuous and probabilistic sleep stager based on a hidden markov model

We report about an automatic continuous sleep stager which is based on probabilistic principles employing Hidden Markov Models (HMM). Our sleep stager offers the advantage of being objective by not relying on human scorers, having much finer temporal resolution (one second instead of 30 seconds),and being based on solid probabilistic principles rather than a predefined set of rules (Rechtschaffen and Kales). Results obtained for nine whole night sleep recordings are reported.     

An algorithm for silhouette of curved surfaces based on graphical relations

The proposed algorithm displays the projected surface Γ as a quadrilateral grid of straight segments, g; any one of these can be part of the silhouette if, and only if, the two patches connected along g lie on the same side of it. The same segment g is drawn, if it is not hidden by remote patches. The algorithm can be applied to any surface regular or not and self-intersecting and can display the entire silhouette or a part of it. It is simple, it uses only the rectangular coordinates of the projected vertices of the grid and requires few elementary mathematical operations.     

Contour tracking with automatic motion model switching

In this paper we present an efficient contour-tracking algorithm which can track 2D silhouette of objects in extended image sequences. We demonstrate the ability of the tracker by tracking highly deformable contours (such as walking people) captured by a static camera. We represent contours (silhouette) of moving objects by using a cubic B-spline. The tracking algorithm is based on tracking a lower dimensional shape space (as opposed to tracking in spline space). Tracking the lower dimensional space has proved to be fast and efficient. The tracker is also coupled with an automatic motion-model switching algorithm, which makes the tracker robust and reliable when the object of interest is moving with multiple motion. The model-based tracking technique provided is capable of tracking rigid and non-rigid object contours with good tracking accuracy.     

视频人体下肢运动分析系统

针对如何高效、准确地从视频图像中提取相关特征向量,完成基于视频的人体运动分析,构建了基于视频信息的人体下肢运动系统。系统包括人体运动轮廓的提取、噪声处理和人体下肢建模及分析3个模块。人体运动轮廓提取中采用改进的光流算法,通过阈值设置改善了轮廓提取的清晰度和完整性。噪声处理模块运用单个中值滤波器与人体四周去噪算法,不仅有效解决了多中值滤波引起的人体轮廓模糊问题,同时使人体活动区域外的噪声去除率达到100%。通过系统分析,视频中人体行走的速度为0.687 m/s,髋关节垂直方向上下起伏幅度为4.71 cm,行走步态正常。     

一种基于多Agent的双向智能自动匹配系统模型

研究了信息在计算机网络中的双向智能匹配问题;给出了一种基于多Agent技术的双向智能自动匹配系统模型,阐述了其组成架构、工作原理及流程,提出了多Agent间协作机制和信息的模糊匹配;实现了信息搜索过程中信息高速精准的双向智能自动匹配,并指出了它并行性的发展方向。     

Automation of bridge deck graphical representations based on a shape geometric model

The construction of a new bridge interferes with the existent environment. A careful aesthetic study must be made at an early stage in the design and the visualisation of a three-dimensional (3D) model of the structure is the best way to analyse it. As the bridges deck presents a complex shape it is difficult to execute a 3D deck model as well as the specific drawings or a 3D finite elements mesh of the deck.The modelling scheme proposed here allows the automation of the geometric design phases related to the deck element using as a means of integration a geometric database representative of the real deck shape. This concept was implemented in a computer programme. This application is an important support in a bridge design namely at the conceptual, analytical and final stages.     

全自动锡膏印刷机运动控制系统的研究

以全自动锡膏印刷机为研究对象,提出了基于PLC的印刷机运动控制系统的硬件体系结构,完成了运动控制系统的软件设计,将状态机思想引入于PLC程序的编写中,不仅简化了编程,而且有效保证了系统的稳定性及可靠性;解决了电机需要切换倍频时的绝对位置定位问题,提高了系统的运行速度及运动控制精度.