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To prepare studying hierarchical intelligent control system of material flows in mineral processing plant further, picturing, transition rulers, analytic methods, relevance matrix and dynamic equation, defect in applying of Petri network, fall short of orient object models applying are discussed after technology of formalization model built, non-formalization built and compound model. And Petri network system with time attribute is expanded opening network system with interface of input and output. The network system expanded with all attributes of basic Petri network model has hierarchy and recursiveness, can be analyzed with mathematical tools of network system and can deal with concurrent and asynchronously also.

为了对选矿厂生产物流递阶智能控制系统的进一步研究奠定基础,本文在讨论了形式化建模技术、非形式化建模技术和复合模型的基础上,研究和分析了Petri网的图形表示、变迁规则、分析方法、关联矩阵与动态方程、Petri网模型应用中的缺陷、面向对象模型应用中的不足,并把采用赋时的Petri网系统扩展成为对外界有输入和输出接口的开放网系统,扩展后的Petri网具有递阶性和递归性,同时保持基本Petri网的所有性质,使模型仍可采用网系统数学工具进行分析,并可处理生产物流系统中的并发性和异步性。

According to the intelligent slave station based on DP technology are presented after the theory about PROFIBUS-DP technology is analyzed.

针对这一现状,本论文在对PROFIBUS-DP技术进行理论分析和研究的基础上提出了基于DP技术的智能从站接口的设计方案及其实现过程。

For the characteristics of voile cleaning machine in textile producing, a new control system based on CAN fieldbus is presented in this paper, The principle of the system is introduced, The interface of the network and the communication protocol of the system are discussed in detail, The design of control software is also analyzed, the main program of communication is given. For CAN network communication of master and slave station,the system works reliably, and the voile cleaning is controlled intelligently. It is an advanced control technology. which is verified in practice .

针对纺织生产过程中清纱机的工作特点,提出了一种基于CAN总线技术的控制系统设计方法,分析了系统的工作原理、网络拓扑结构及其硬件构成,详细阐述了CAN总线的网络接口方法和系统通信协议,讨论了控制软件的设计,给出了CAN网络的主要通信程序,由于这种系统的主、从站之间采用CAN网络通信,实现了对清纱工程的智能控制,系统具有运行可靠、性能价格比高的特点,实践证明这是一种先进的控制技术,具有较大的推广意义。

Altera Corporation system to the Cyclone FPGA series of digital platform, microprocessor, bus, Digital Frequency Synthesizer, memory and I / O interface hardware concentrated in an FPGA, the use of direct digital frequency synthesis technology and digital modulation waveforms required to achieve the rise, Using FPGA ROM storage of the DDS waveform table, and make full use of on-chip resources, improve the system's accuracy, stability and robustness.

系统以 ALTERA公司的 Cyclone 系列 FPGA 为数字平台,将微处理器、总线、数字频率合成器、存储器和 I/O 接口等硬件设备集中在一片 FPGA 上,利用直接数字频率合成技术、数字调制技术实现所要求波形的产生,用 FPGA 中的 ROM 储存 DDS 所需的波形表,充分利用片上资源,提高了系统的精确度、稳定性和抗干扰性能。

This News Publication System takes Database as background, exploit foreground by ASP technology, its simple, brilliant, practical function and well-set Peripheral Interface can cooperate other sub-system of site to promulgate all kinds of news.

本系统以数据库为后台,采用ASP技术开发前台,其功能简单、鲜明、实用性强,且具有良好的外设接口,能够很好的配合站点的其它子系统服务于各种的新闻发布。关键词:可行性;版块管理;行为统计;ASP技术。

The AAL reduces the time it takes to hook these technologies together and to add a new technology that interfaces with existing ones.

在AAL的减少所花费的时间挂钩这些技术合作,并加入新的技术,与现有的接口。

The information collecting module deployed on resources is designed to obtain state information of resources; the information node server is introduced for assembling and managing resource information. The XML format is used to formalize the data source and information transport. Meanwhile adopt native-XML database technology for direct data store and process. The interface for information query and resource information filtering is implemented through Web service capsulation.

开发了部署于资源上的信息采集模块,获取资源状态信息;引入信息结点服务器实现对资源信息的汇集与管理;在采用XML格式对子系统中信息来源和信息传输进行规范的同时,利用native-XML数据库技术实现对数据的直接存储及处理,并通过Web服务的封装提供了资源信息过滤与信息查询接口;基于RIA技术开发了友好的Web访问界面。

On the one hand, the component method is introduced into flowchart design, which can not only enlarge the depth and the connotation of the flowchart, but also extend the traditional concepts of the flowchart. By combining the component method and the objectoriented method, it will be easy to illustrate the industry flow and meet with the future requirements of the industry control software. On the other hand, the trajectory concepts in plane moving, the method of using Bezier Curve to approach the 1/4 arc to implement the arc circumrotation, the method of using graphic elements' combination to extend the expression capability, and the method of combining the graphic elements'combination, three-dimensional graphic elements and bitmaps to realize the three-dimensional effects to express the industry flow more realistic are brought forward in this dissertation.

工控软件中最能够体现人机接口设计创造性的画面当属流程图,本文对流程图设计进行了深入研究,提出了一种工控软件流程图设计的新方法:一方面在流程图设计中引入部件化方法,扩展流程图的深度与内涵,延伸了流程图的传统概念与意义,将部件化技术与面向对象技术相结合,能够更好地实现对工艺过程的描述并适应工控软件的未来发展要求;另一方面对流程图中动画关联和三维化这些新兴领域进行了研究,提出了平移动画中的&轨道&概念,以实现图元的沿曲线平移,提出了在圆弧旋转动画中用Bezier曲线逼近〓圆弧的工程化方法,并用最小二乘法进行了验证和工程化参数的获取,实现了利用图元组合来扩展流程图的表达能力,采用了图元组合、三维图元和位图相结合的方法来实现逼真的三维效果,以使工控软件更加符合人机工学,更能形象地反映工艺流程。

It has the following characteristics: 2D drawings can be maintained with a high degree of consistency of 3D model; CAD /CAPP /CAM are integrated by the generation of comp lete manufacturing information and the integrated digital p roduction line of shell, outfitting and painting is imp lemented basically; the generation of comp lete manufacturing and management information of shell, outfitting and painting lays the foundation for the integration of design, manufacturing and management; the entity and parametrized technology is used to ensure the establishment of ship p roductmodelwith comp lete topology relations; and the data interfaces for the heterogeneous CAD data and information integration ensure the collaborative design for the factories and the institutes.

SPD系统具有如下特点:能保持三维模型与二维图纸的高度一致;通过生成完整的加工制造信息实现CAD/CAPP/CAM集成,基本打通&壳、舾、涂一体化&的数字化生产线;通过生成壳、舾、涂完整的制造和管理信息,为实现船舶&设计、制造、管理一体化&奠定基础;通过实体和参数化技术为建立具有完整拓扑关系的船舶产品模型提供有力手段;并通过与其他系统的数据接口实现异构CAD的数据和信息集成,为厂、所协同设计创造技术条件等。

After having finished the above project, to the key tenology fielbus, this pater tries to develope .a fieldbus product suitable for our country, it has accomplished these jobs:(1) establishment of technologic scheme and arithmetic of the communication protocol;(2) design,development and debug of slave station interface.

在完成上述工作的基础上,针对现场总线这一关键技术,本论文力图研制一种具有自主知识产权适合生产信息集成的现场总线产品,完成了:(1)通信协议的物理层,数据链路层技术方案和算法的制定;(2)从站接口软硬件的设计、研制和调试。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。