A novel reconfigurable data-flow architecture for real time video processing

This paper describes a dynamically reconfigurable data-flow hardware architecture optimized for the computation of image and video. It is a scalable hierarchically organized parallel architecture that consists of data-flow clusters and finite-state machine (FSM) controllers. Each cluster contains various kinds of cells that are optimized for video processing. Furthermore, to facilitate the design process, we provide a C-like language for design specification and associated design tools. Some video applications have been implemented in the architecture to demonstrate the applicability and flexibility of the architecture. Experimental results show that the architecture, along with its video applications, can be used in many real-time video processing.     

Hardware architecture design of block-matching and 3D-filtering denoising algorithm

Block-matching and 3D-filtering(BM3D) is a state of the art denoising algorithm for image/video,which takes full advantages of the spatial correlation and the temporal correlation of the video. The algorithm performance comes at the price of more similar blocks finding and filtering which bring high computation and memory access. Area, memory bandwidth and computation are the major bottlenecks to design a feasible architecture because of large frame size and search range. In this paper, we introduce a novel structure to increase data reuse rate and reduce the internal static-random-access-memory(SRAM) memory. Our target is to design a phase alternating line(PAL) or real-time processing chip of BM3 D. We propose an application specific integrated circuit(ASIC) architecture of BM3 D for a 720 × 576 BT656 PAL format. The feature of the chip is with 100 MHz system frequency and a 166-MHz 32-bit double data rate(DDR). When noise is σ = 25, we successfully realize real-time denoising and achieve about 10 d B peak signal to noise ratio(PSNR) advance just by one iteration of the BM3 D algorithm.     

Applying First Order Predicate to the Semantic Query of Chinese

This paper described an approach to make inferences on Chinese information using first order predicate logic, which could be used in the semantic query of Chinese. The predicates of the method were derived from the natural language using rule based LFT, the axiom set was generated by extracting lexicon knowledge from HowNet, and the first order predicate inferences were made through symbol connection of center words. After all these were done, the evaluation and possible improvements of the method were provided. The experiment result shows a higher precision rate than that traditional methods can reach.     

Research in Green Modularity Design Methodology

Green design and manufacturing is a proactive approach to minimize wastes during a product＇s design stage, thus preventing future environmental impacts. Current modular design method mainly focuses on product functional and manufacturing issues. In this paper, a theoretical scheme of multi-objective modularity analysis for discrete electromechanical product design was proposed. Product physical architecture was represented by a fuzzy graph, where fuzzy relationships contain environmental objectives and influence module formulation. Finally the optimal product modules combining all objectives can be searched by clustering algorithm.     

Constrained Run-to-Run Optimization for Batch Process Based on Support Vector Regression Model

Introduction Batch and semi-batch processes are very im-portant in the fine chemicals industry to manufac-ture the low-volume and high-value products suchas biochemicals, crystals and speciality chemicals.In the control of batch process, the major objectiveis to improve the end-of-batch product properties.When the control objective is to optimize a perfor-mance index at the end of batch cycle, the problemis called the end-point optimization problem. Tosolve the problem,the traditional approach…     

Approach for Reliability Evaluation of Cross-Linked Polyethylene Under Combined Thermal and Vibration Stresses

Based on Wiener process model, a new approach for reliability evaluation of cross-linked polyethylene(XLPE) is proposed to improve the lifetime evaluation reliability of XLPE under multi-stressing conditions and study the failure probability distribution. In this paper, two accelerated aging tests are carried out under combined thermal and vibration conditions. The volume resistance degradation data of XLPE samples are tested with a24 h interval under the accelerated stressing conditions at(130℃, 12 m/s~2) and(150℃, 8.5 m/s~2), respectively.Nonlinear degradation data obtained from the experiment are transformed to linear intermediate-variable values using time scaling function, and then linearized degradation data are calculated and evaluated on the basis of linear Wiener process model. Considering traditional Arrhenius equation and inverse power criterion, parameters of the linear Wiener model are estimated according to the maximum likelihood function. The relationship curves on probability density and reliability are given, and the lifetime distribution of XLPE under different stressing conditions is also obtained for evaluating the reliability of XLPE insulation. Finally, the life expectancy of XLPE is 17.9 a under an allowance temperature of 90℃ and an actual vibration acceleration of 0.5 m/s~2. The approach and results in this paper may be used for reliability assessment of high-voltage multiple samples or apparatuses.     

A Practical Approach of Developing Mathematical Model for All Speed Governors

The paper introduced a special approach for diesel‘s all-speed-governor modeling, which, in some cases,could solve the knotty problem frequently met in computer simulation of diesel propulsion system or diesel generating set. Suppose that it is hard to get a control-oriented governor mathematical model when the general approaches, the analytical approach or the experimental approach, are applied, and that an open-loop step response of the diesel engine and its system is available by means of computer simulation, the critical three parameters of a governor mathematical model, the proportional gain Kp, integral time constant Ki, and derivative time constant Kd, can be determined by use of PID tuning method which are widely applied in industrial process control. This paper discussed the train of thought of the approach, precondition, procedure, several modifications of the classical PID model, and some points for attention. A couple of case studies were given to demonstrate the effectiveness of this approach.     

Particle swarm approach for structural optimization of battleship strength deck under air blast

This paper presents the implementation and application of a modified particle swarm optimization （PSO） method with dynamic adaption for optimum design of a battleship strength deck subjected to non-contact explosion. The numerical simulation process is modified to be more computationally efficient so that the task is realizable. The input variables are the thickness of plates and the dimensions of stiffeners, and the total structural mass is chosen as the fitness value. In another case, the response surface method （RSM） is introduced and combined with PSO （PSO-RSM）, and the results are compared with those obtained by the traditional PSO approach. It is indicated that the PSO method can be well applied in the optimum design of explosion-loaded deck structures and the PSO-RSM methodology can rapidly yield optimum designs with sufficient accuracy.     

An Innovative On-Board Computer for Space Robot

In this paper an on-board computer system for the first Chinese Intelligent Space Robotic System was presented. A fault tolerance design on on-board computer （OBC） was proposed that allows commercial-off-the-shelf （COTS） devices to be incorporated into dual processing modules of on-board computer. The processing module is composed of 32-bit ARM RISC processor and other COTS devices. This innovative approach deeply relies on light weight/low cost equipment development using commercial miniaturized parts and non-space qualified technologies. As well as, a set of fault handling mechanisms was implemented in the computer system. The on-board software was organized around a set of processes that communicate between each other through a routing process. The qualification experiment shows that the fault tolerant on-board computer has excellent data processing capability and is enough to meet the demanding of the extremely tight constraints on mass, volume, power consumption and space environmental conditions.     

A New Scheme of Integrating NAS with SAN

This paper reviewed two types of network storage technique: NAS and SAN, After comparing and analyzing, it concluded that the ultimate realization of network storage will be in the eventual convergence of NAS and SAN architectures. Currently, all the integration methods are based on the architecture level. This paper present-ed a device-level integration scheme based on IXP1200 network processor. The device can be used as an NAS file server or an SAN‘s storage node. Furthermore, it can be used as a bridge to connect NAS and SAN, and then beshared by their clients.     

基于队列的处理器亲和机制及在网络转发中的应用

提出一种新的基于多报文队列的处理器亲和机制,与传统基于网络接口的亲和机制相比,消除了多处理器对共享资源的竞争,优化了处理器的CACHE行为,降低了互斥锁的影响范围,能够有效提升多核处理器系统的网络转发处理能力.试验结果显示,在复杂网络环境下,基于队列的亲和机制报文转发性能较传统基于接口的亲和机制提高了1.8倍.     

xpMODEL: A Novel Model for ASIP Architecture

Introduction Various factors are making it increasingly dif-ficult and expensive to design and manufacture tra-ditional ASICs. In fact, there are signs of a revolu-tion afoot, with an increasing trend of engineersfrom hardware application groups going off…     

基于数据仓库的决策支持系统体系结构

在分析传统DSS的不足之后，提出了基于数据仓库决策支持系统的体系结构，主要包括模型库、方法库、知识库和数据仓库及其相应的管理系统，联机分析处理、数据挖掘单元和问题综合处理单元等几部分组成．研究了系统中各部分的功能、相互关系及基于数据仓库的决策支持系统的关键技术．     

基于EJB／CORBA的网络应用软件体系结构的研究

现有的应用软件体系结构不能适应企业网络应用日益增长的要求。通过分析CORBA（Common Object Request Broker Architecture)和EJB（Enterprise Java Beans)体系结构的优缺点，研究并提出了实现基于EJB／CORBA的应用软件体系结构的途径。该体系结构下的应用软件系统具有良好的可复用性、可移植性、可扩展性和可重构性，并且大大简化了企业对已有应用软件系统的再工程。采用该应用软件体系结构能使企业的已有投资得到保值增值，降低和减小企业建设新信息系统的成本和周期，使企业新建设的信息系统能够敏捷地适应企业内外环境和业务的变化。     

Design and implementation of a data-driven dynamical reconfigurable cell array

The nature of dataflow computation demands the heavy flow of tokens amongst computation nodes. Traditional reduced instruction-set computer (RISC) processors are not suitable for such style computation. Devices that use long wire buses are not suitable for dataflow either. Reconfigurable computing devices (RCDs) consist of data transfer wires and computing resources. With minor modifications, reconfigurable cells can be adopted to perform dataflow computation. A reconfigurable cell array (RCA) is presented in this paper and it is suitable for dataflow computation. This cell array has a dynamic reconfigurable storage model. The distinctive features of the architecture include dataflow reconfigurable cells and reconfigurable storage. Dataflow applications can be mapped easily and effectively onto the cells. Reconfigurable storage is mainly used to manage data access and transmission. Furthermore, computation and data management are separated. Meanwhile, dynamical reconfiguration is accomplished, when some clusters of cells work in configuration mode and other clusters work in computation mode. The dataflow graphs of some algorithms are mapped onto our architecture, and the performance results are compared with those of CPU and GPU.     

我国智能交通系统(ITS)体系框架开发的关键技术

介绍了我国ITS体系框架开发的研究背景、概念、内容;明确提出了ITS体系框架的研究方法及开发思路,并对ITS体系框架的开发过程以图表形式作了详细说明,旨在全面了解我国ITS的开发研究;最后指出ITS技术的实施是解决当前交通问题的主要方式。     

基于AHP和DEA方法的公路建设项目评价

建立了公路建设项目的综合评价指标体系,改进了传统的数据包络分析方法;将层次分析法和改进的数据包络分析方法相结合,建立了综合评价模型;实证了运用该模型解决公路建设项目评价问题的可行性.     

ATMS共用信息平台研究

针对目前智能交通系统各子系统信息无法充分利用的现状,分析了共用信息平台的信息交换、信息处理、信息存储与管理、信息应用服务4个方面的功能。按功能模式提出了共用信息平台的体系结构,并重点讨论了该体系结构功能的实现方法,特别是信息交换接口层和信息处理层。信息交换接口层通过识别信息格式的标识实现了信息格式的转换：信息处理层通过时至数据的规范化统一信息内容,采用路网点位交通参数与GIS图表的映射,实现路网数据库的存储管理;结合信息采集技术可靠度等级划分,采用数据关联校验方法解决了数据准确性验证问题。