纱线张力动态测试方法

论述了各种纱线张力动态测试装置,提出了一种新型的环锭纺纱张力测试方法,利用传感器技术和计算机系统对纱线张力进行动态检测和实时控制,为生产过程自动化和提高产品质量提供了途径。     

计算机硬件虚拟实验平台的设计及实现

就仿真和模拟技术在教学上的应用，讨论了在微机上模拟硬件实验，建立“计算机硬件虚拟实验室”的可行性、实用性及其研究意义。通过分析计算机硬件实验的流程和关键技术，提出了一套系统设计和实现方案。该系统主要模拟由IC和电线所组成的数字电路。系统以面包板为中心，搭配零件库、仪表和电路板制作工具，来协助学生进行计算机硬件实验的设计、模拟、除错与制作。     

TWIXT: A 3D animation system

This paper describes a visually interactive 3D computer animation system. Animation is controlled by lists of events stored in tracks. Tracks are interpolated by functions that have an arbitrary degree of knowledge about how to control display parameters. The system provides real time wireframe playback so the animator can see what the animation looks like and is both input and output device independent.     

Design and implementation of domain-specific language easytime

Measuring time in mass sporting competitions is, typically, performed with a timing system that consists of a measuring technology and a computer system. The first is dedicated to tracking events that are triggered by competitors and registered by measuring devices (primarily based on RFID technology). The latter enables the processing of these events. In this paper, the processing of events is performed by an agent that is controlled by the domain-specific language, EasyTime. EasyTime improves the flexibility of the timing system because it supports the measuring of time in various sporting competitions, their quick adaptation to the demands of new sporting competitions and a reduction in the number of measuring devices. Essentially, we are focused on the development of a domain specific language. In practice, we made two case studies of using EasyTime by measuring time in two different sporting competitions. The use of EasyTime showed that it can be useful for sports clubs and competition organizers by aiding in the results of smaller sporting competitions, while in larger sporting competitions it could simplify the configuration of the timing system.     

基于DSF架构的USB设备虚拟

USB(Universal Serial Bus)已经成为电子产品对外接驳接口中最为流行的总线标准,针对Window操作系统下USB设备驱动预先开发的需求,介绍了如何使用DSF(Device Simulation Framework:设备虚拟框架)虚拟在物理上并不存在的USB设备.开发该虚拟设备的主要过程包括:基于一种...     

Prior model evaluation from Null Space Compensation perspective with application to surface reconstruction from single images

Prior model is widely applied in the area of computer vision and computer graphics. However, there is still a lack of a general theoretical scheme for evaluating the performance of the priors and a guidance for choosing suitable models. In this paper, a general scheme is proposed for linear singular problems based on the idea of Null Space Compensation. It is proved that for a linear prior model the principal directions obtained from the singular value decomposition of the model shall not be parallel to those of the system matrix determined by the problem. It is also suggested that for a nonlinear prior, higher correlation between the null space components of the estimate data based on the given prior and those of the ground truth or controlled data indicate the better suitability of the prior. The proposed evaluation scheme is demonstrated through an application to a linearized shape from shading problem, where surface shall be reconstructed from single 2D images. Both linear model and nonlinear constraints are evaluated with experiments on both synthetic images and real images. The results validate the proposed evaluation scheme and its capability for guiding in choosing a good prior model structure.     

考虑切换的强实时双机系统的可靠性研究与实现

在高可靠,强实时环境中,双机系统的状态切换已成为系统实时性,可靠性的关键。该文主要提出考虑切换的强实时双机系统可靠性模型,并给出了提高强实时双机系统可靠性的方法。     

Two-level CAMAC handler software

The philosophy and implementation of CAMAC software at the K.V.I. (Groningen, The Netherlands) is discussed. A two-level device-handler—CAMAC-driver software system has been developed in which computer peripheral devices as well as nuclear instrumentation are interfaced through CAMAC. For the typical user who is concerned primarily with nuclear experiments rather than with computer software, CAMAC is largely transparent. The CAMAC-driver is protected from re-entry to allow concurrent I/O on multiple devices for true real-time operation, and contains a queueing scheme for allocating hardware data channels. Some features of the hardware and operating system software needed for successful implementation of the two-level handler scheme are pointed out.     

跨域客户间口令认证的密钥交换协议

为实现跨域客户与客户之间安全的通信,并提高该过程的效率和实用性,提出一种使用普通存储设备或移动智能设备实现基于口令认证的密钥交换协议.该协议使用普通存储设备和随机数取代昂贵的智能卡和时钟同步系统,使得它在私钥环境下可以抵抗各种已知的攻击,达到相应的安全性要求.保留了智能卡的优点,无需保存客户的口令表或者验证表,消除智能卡在实际应用中受到的各种限制.普通存储设备和随机数的引入增强了协议的安全性、提高了协议执行的效率和实用性.     

显微镜平台自动控制系统的设计

设计了一种新型的带USB接口的显微镜平台自动控制系统,给出了技术解决方案。该方案提供对显微镜平台的两种控制方式:计算机自动控制模式和操纵杆手工控制模式。该方案改造加工工作量小,成本低,具有较好的市场推广前景。     

Data‐Driven Crowd Motion Control With Multi‐Touch Gestures

Controlling a crowd using multi‐touch devices appeals to the computer games and animation industries, as such devices provide a high‐dimensional control signal that can effectively define the crowd formation and movement. However, existing works relying on pre‐defined control schemes require the users to learn a scheme that may not be intuitive. We propose a data‐driven gesture‐based crowd control system, in which the control scheme is learned from example gestures provided by different users. In particular, we build a database with pairwise samples of gestures and crowd motions. To effectively generalize the gesture style of different users, such as the use of different numbers of fingers, we propose a set of gesture features for representing a set of hand gesture trajectories. Similarly, to represent crowd motion trajectories of different numbers of characters over time, we propose a set of crowd motion features that are extracted from a Gaussian mixture model. Given a run‐time gesture, our system extracts the K nearest gestures from the database and interpolates the corresponding crowd motions in order to generate the run‐time control. Our system is accurate and efficient, making it suitable for real‐time applications such as real‐time strategy games and interactive animation controls.     

Indoor Positioning and Navigation with Camera Phones

This low-cost indoor navigation system runs on off-the-shelf camera phones. More than 2,000 users at four different large-scale events have already used it. The system uses built-in cameras to determine user location in real time by detecting unobtrusive fiduciary markers. The required infrastructure is limited to paper markers and static digital maps, and common devices are used, facilitating quick deployment in new environments. The authors have studied the application quantitatively in a controlled environment and qualitatively during deployment at four large international events. According to test users, marker-based navigation is easier to use than conventional mobile digital maps. Moreover, the users' location awareness in navigation tasks improved. Experiences drawn from questionnaires, usage log data, and user interviews further highlight the benefits of this approach.     

Intelligent on-line system identification using a blackboard system

Adaptive control systems have been developed and used for a number of decades. However, there are still some problems with their operation, which limit wider industrial adoption. This paper addresses one aspect of adaptive control, namely the on-line system identification of the time-varying process being controlled. The approach adopted is to use a blackboard system to identify the time-varying process model. The blackboard system contains knowledge sources with, algorithmic, fuzzy-logic and evolutionary reasoning. The paper describes the design of a computer simulation of this approach, concentrating on the fuzzy reasoning used to validate the multiple models, and the evolutionary techniques used to reject poor models and introduce better models. The computer simulation is then evaluated, firstly using simulated plant data and then using real plant data from an experimental hot air dryer. It is concluded that the technique is practical, and worthy of further testing on a pilot plant.     

风机实时在线监测系统

介绍了一种应用EntekXM系列模块,解决大型风机设备的实时监测以及保护问题的方案。通过这一系统,可以将风机设备运行期间的实时数据通过以太网传输至上位机进行处理,实现了实时监测与故障诊断,同时对于风机设备运行期间的异常情况能够及时的发出警报和跳闸信号。     

An interactive FORTRAN 77 program using GKS graphics for 2.5 D modeling of gravity and magnetic data

An interactive 2.5 D gravity and magnetics modeling program has been written for an ICL PERQ 2 workstation using FORTRAN 77 and GKS graphics. All of the available hardware and software input devices are utilized through GKS to produce an easy-to-use menu-driven program. A large number of functions are controlled by the software in order than the user can concentrate on the model. A range of options also are provided for manipulating the observed anomaly. The use of FORTRAN 77 and GKS should make the program easily portable to other computer systems and graphics devices. The modular form of the program should facilitate readily further development including optimization and real time modeling, given a more powerful computer with high-speed graphics.     

A computer simulator for use in an introductory course on computer systems and assembly language programming

This paper describes a simulator for a computer system comprising a simple central processor, memory and a variety of peripheral devices. The simulator is used in the laboratory component of an introductory course on computer systems and assembly language programming. The simulator exploits the limited “cursor graphics” capabilities of commonly available display terminals; the graphics are used to present a view of the internal operations of the simulated computer.     

溴化锂吸收式制冷机的远距离分布控制

介绍了溴化锂吸收式制冷机远距离分布控制——ＬＢＤ－１系统的配置、控制方案及软件技术。根据机组状态采用分段ＰＩＤ控制，提高了高压发生器液位的稳定性；利用简单可行的延时方法，确保系统检测信号的真实性。调试结果证实了本方案的有效性。     

Visual capture and understanding of hand pointing actions in a 3-D environment

We present a nonintrusive system based on computer vision for human-computer interaction in three-dimensional (3-D) environments controlled by hand pointing gestures. Users are allowed to walk around in a room and manipulate information displayed on its walls by using their own hands as pointing devices. Once captured and tracked in real-time using stereo vision, hand pointing gestures are remapped onto the current point of interest, thus reproducing in an advanced interaction scenario the "drag and click" behavior of traditional mice. The system, called PointAt (patent pending), enjoys a careful modeling of both user and optical subsystem, and visual algorithms for self-calibration and adaptation to both user peculiarities and environmental changes. The concluding sections provide an insight into system characteristics, performance, and relevance for real applications.