Lua在TD-SCDMA网络测试仪中的应用

传统网络测试仪采用xml或ini配置文件实现消息过滤功能,针对时分同步码分多址接入(TD-SCDMA)网络测试仪需要支持复杂组合逻辑条件的消息过滤功能,采用Lua脚本语言,通过在宿主程序中调用Lua函数和向Lua脚本注册C函数来实现该功能。测试结果表明,方案较好地满足了仪表的功能需求,达到了预期目标。     

动态脚本语言Lua与C++交互方法的研究与实现

针对当前利用C＋＋开发大型复杂程序代价高、周期长的问题,为了充分发挥Lua动态脚本语言的特点。重点探讨了如何在Lua脚本中模拟消息事件机制和Lua访问C＋＋接口的具体实现方法以及Lua调试器的设计方案。     

Lua语言在轻量级Web服务器设计中的应用

Lua是一种小巧的脚本语言,它的易扩展性与整合性,使得它可以与别的语言很好的融合在一起,实现各种各样的需求,因此它的应用非常的广泛.本文利用Lua脚本语言与标准C语言相结合,在Linux操作系统上设计并实现了一个轻量级的Web服务器程序.Lua脚本语言的引入,使Web服务器不仅易于配置和安装,而且可以在那些无法负担IIS的主机上顺畅地运行;还进一步提高了服务器的运行速度,并增强了服务器的灵活性和扩展性.     

基于OGRE与Kinect的体感游戏平台的研究

提出将Kinect体感技术嵌入到游戏引擎OGRE中,首先在OGRE基础上搭建游戏场景,将Kinect体感外设与游戏角色绑定,引入MyGUI界面模块,使用Lua作为交互脚本,搭建一个面向前沿的具有可拓展性的体感游戏平台。     

FLAME: a formal framework for the automated analysis of software product lines validated by automated specification testing

In a literature review on the last 20 years of automated analysis of feature models, the formalization of analysis operations was identified as the most relevant challenge in the field. This formalization could provide very valuable assets for tool developers such as a precise definition of the analysis operations and, what is more, a reference implementation, i.e., a trustworthy, not necessarily efficient implementation to compare different tools outputs. In this article, we present the FLAME framework as the result of facing this challenge. FLAME is a formal framework that can be used to formally specify not only feature models, but other variability modeling languages (VML s) as well. This reusability is achieved by its two-layered architecture. The abstract foundation layer is the bottom layer in which all VML-independent analysis operations and concepts are specified. On top of the foundation layer, a family of characteristic model layers—one for each VML to be formally specified—can be developed by redefining some abstract types and relations. The verification and validation of FLAME has followed a process in which formal verification has been performed traditionally by manual theorem proving, but validation has been performed by integrating our experience on metamorphic testing of variability analysis tools, something that has shown to be much more effective than manually designed test cases. To follow this automated, test-based validation approach, the specification of FLAME, written in Z, was translated into Prolog and 20,000 random tests were automatically generated and executed. Tests results helped to discover some inconsistencies not only in the formal specification, but also in the previous informal definitions of the analysis operations and in current analysis tools. After this process, the Prolog implementation of FLAME is being used as a reference implementation for some tool developers, some analysis operations have been formally specified for the first time with more generic semantics, and more VML s are being formally specified using FLAME.     

Active network supports for mobile IP

The basic mobile IP protocol is difficult to implement on the traditional IP network and not flexible and efficient under certain conditions.For example,firewalls or boundary routers may drop packets sent by mobile nodes for security reasons.Traditional networking devices such as routers cannot dynamically load and unload extended services to achieve different qualities of services.In this paper,a new scheme of using the active network to support the mobile IP is presented.The Softnet,a prototype of active networks based on mobile agents,is introduced.The active network is characterized by the programmability of its intermediate nodes and therefore presents dynaic and flexible behaviors.Special services can be dynamically deployed onto the active nodes in the Softnet.This property is definitely required in implementing the mobile IP protocols.The SOftnet.This property is definitely required in implementing the mobile IP protocols.The Softnet.This property is definitely required in implementing the mobile IP protocols.The Softnet supports not only the basic mobile IP protocol but also other extended mobile IP protocols.Virtual networks for mobile IP services are dynamically formed by mobile agents in the Softnet to provide different qualities of services.     

Telerobot-enabled HUB-CI model for collaborative lifecycle management of design and prototyping

The HUB-CI model is investigated in a telerobotic system in a client/server network to manage the lifecycle of engineering design and prototyping. The purpose of this platform is to support collaborative engineering design and proof of concept to enhance distributed team collaboration and resource utilization. The suggested platform is exemplified in two collaboration support tools and a physical prototyping platform. Structured Co-Insight Management is developed to support innovative idea exchanges and the consensus decision-making during the design process. Conflict/error detection management helps preventing conflicts and errors during the lifecycle of design and development. Physical collaboration over the network occurs when a team controls the telerobot operation during prototyping and testing in design cycles. A pilot system is implemented with a group project for the design of an electronic circuit (including both hardware and software designs). The functional assessment method is used to compare this platform to other collaborative design tools. The system presented offers unique qualitative advantages as an integrated collaboration support system.     

浅析游戏脚本语言Lua

脚本语言Lua小巧高效,能与C／C＋＋语言自然的结合与交互,其设计目的是为了嵌入应用程序中,从而为应用程序提供灵活的扩展和定制功能,让客户在游戏中设计自己的客户端脚本,制作特殊的游戏逻辑插件。     

复杂产品虚拟样机支撑平台的初步研究与开发

该文主要研究并介绍了复杂产品虚拟样机支撑平台研究项目取得的阶段研究成果，包括支撑平台体系结构及其关键技术等，尤其重点介绍了目前自行开发集成的，开放的，基于标准支持多领域复杂产品虚拟样机工程的支撑平台，并给了两个基于支撑平台的典型虚拟样机开发应用案例。初步实践表明复杂产品虚拟样机支撑平台可看作为下一代企业协同应用各领域CAx/DFx工具的有效手段。最后，对进一步研究工作进行了展望。     

PhotoShop Scripting技术及其应用

从“Action（动作）”的功能不足，引出Photoshop中全新的自动化操作方法——Scripting。介绍了PhotoShop Scripting的应用平台，对象模型及其层次结构，以及基本操作流程。最后，以批量编辑处理网站素材图片的实际应用为例，分析出Scripting技术相对于传统的“动作”的优势，揭示了Scripting技术在提高Photoshop图像处理工作效率方面的作用。     

PhotoShop Scripting技术及其应用

从“Action(动作)”的功能不足,引出Photoshop中全新的自动化操作方法——Scripting。介绍了PhotoShopScripting的应用平台,对象模型及其层次结构,以及基本操作流程。最后,以批量编辑处理网站素材图片的实际应用为例,分析出Scripting技术相对于传统的“动作”的优势,揭示了Scripting技术在提高Photoshop图像处理工作效率方面的作用。     

The programmable network prototyping system

The programmable network prototyping system (PNPS) uses a collection of reusable hardware modules that implement generic communications functions such as transmission, reception, signal propagation, and pattern matching. These modules are interconnected and configured to emulate a variety of communication networks whose behavior can be monitored under different load conditions. The user specifies a network as a set of interacting components using available software tools. These tools are accessible within a prototyping environment that includes a control system for configuring the hardware modules and interconnecting them according to the component specifications. Previously designed components are stored in a library and can be used to specify new networks. Although PNPS is designed to provide a prototyping environment for communication networks, some of the basic ideas can be useful in other contexts     

Fast prototyping of parallel-vision applications using functional skeletons

We present a design methodology for real-time vision applications aiming at significantly reducing the design-implement-validate cycle time on dedicated parallel platforms. This methodology is based upon the concept of algorithmic skeletons, i.e., higher order program constructs encapsulating recurring forms of parallel computations and hiding their low-level implementation details. Parallel programs are built by simply selecting and composing instances of skeletons chosen in a predefined basis. A complete parallel programming environment was built to support the presented methodology. It comprises a library of vision-specific skeletons and a chain of tools capable of turning an architecture-independent skeletal specification of an application into an optimized, deadlock-free distributive executive for a wide range of parallel platforms. This skeleton basis was defined after a careful analysis of a large corpus of existing parallel vision applications. The source program is a purely functional specification of the algorithm in which the structure of a parallel application is expressed only as combination of a limited number of skeletons. This specification is compiled down to a parametric process graph, which is subsequently mapped onto the actual physical topology using a third-party CAD software. It can also be executed on any sequential platform to check the correctness of the parallel algorithm. The applicability of the proposed methodology and associated tools has been demonstrated by parallelizing several realistic real-time vision applications both on a multi-processor platform and a network of workstations. It is here illustrated with a complete road-tracking algorithm based upon white-line detection. This experiment showed a dramatic reduction in development times (hence the term fast prototyping), while keeping performances on par with those obtained with the handcrafted parallel version. Received: 22 July 1999 / Accepted: 9 November 2000     

MAP: Design and implementation of a mobile agents' platform

The recent development of telecommunication networks has contributed to the success of applications such as information retrieval and electronic commerce, as well as all the services that take advantage of communication in distributed systems. In this area, the emerging technology of mobile agents aroused considerable interest. Mobile agents are applications that can move through the network for carrying out a given task on behalf of the user. In this work we present a platform called MAP (Mobile Agents Platform) for the development and the management of mobile agents. The language used both for developing the platform and for carrying out the agents is Java. The platform gives the user all the basic tools needed for creating some applications based on the use of agents. It enables us to create, run, suspend, resume, deactivate, reactivate local agents, to stop their execution, to make them communicate each other and migrate.