This format is independent of any actual computer system , can be used to various application and system , in order to keep the integrity and continuity of the product data when they are exchanged between different systems , we referenced the basic contents of product description in step standard , established product structure modle and guranttee the correctness and shareness of the information in product structure managing system ; at the same time , built the foundation for later expanding of the system functions . starting from the previous analysis , we make the function that the software will achieve very clear . we have explained briefly the relations between every system module and their accomplishing principles of the every funetion and the finish the initial design of the software 为了产品数据在不同的系统之间进行交换时保证其完整性和连续性,充分参考了step标准有关产品描述( iso - 10303 - 44中的产品结构模式和iso - 10303 - 41中的产品定义模式)的基本内容,建立了产品结构模型;保证了产品结构管理系统的信息的正确性和共享性;同时也为以后系统的功能的扩展奠定了基础。又从前面的分析出发,明确了软件实现的功能。对各系统模块之间的数据联系及其各自实现的功能实现原理进行了简要说明,完成了软件的总体设计。
The main content of this thesis includes : ( 1 ) the introduction of theory of digitalization if receiver , including the theories on signal sampling , multi - velocity signal processing , pulse compress , and so on ; ( 2 ) design of system scheme based on system requirements , including confirm the sampling rate , design the decimation filters in digital down converter , and design the matching filters ; ( 3 ) analysis and discussion about the software and hardware implement schemes of digitalization if receiver and the pulse compression system , including the introduction and choice of chips , the realization of system module in fpga , design hardware circuit ; ( 4 ) presentation on the test results about our system based on fpga 本文的主要工作包括: ( 1 )介绍线性调频信号的数字中频接收的原理,主要包括信号采样理论,多速率信号处理理论,脉冲压缩理论等。 ( 2 )结合系统指标进行系统总体方案的设计和论证,包括采样率的确定,数字下变频各级抽取滤波的设计,以及匹配滤波的设计。 ( 3 )分析讨论并给出具有实用价值的线性调频脉冲雷达中频信号数字化接收及脉冲压缩处理系统的软硬件实现方案,包括芯片的选择和简介,系统各个模块在fpga中的实现,以及硬件电路的设计。
The linux kernel possesses the rich software resources , mature functions , steady working behavior . this paper clarifies the modules that make up the kernel , especially analyses the memory management module and the process management module , introduces the virtue file system module , the inter process communication module and the network module . so we have the deep theory foundation to reconstruct the kernel Linux的内核是一个软件资源十分丰富,功能完善,工作稳定的系统内核,本文对其组成模块进行了深入的分析,着重剖析了内核的内存管理模块和进程管理模块,介绍了虚拟文件系统模块、进程通信模块、网络接口模块的工作原理,为对linux内核进行改造奠定了坚实的理论基础。
This thesis can be divided into ten chapters , the ieee1451 networked smart sensor module is introduced at length , the development of network capable application processor based on dsp platform and a series of smart transducer modules are discussed in detail , the application layer communication methods of networked smart sensor and correction , compensation methods and correction engine are deep researched , the key technologies of support software for networked smart sensor are presented , at last , multi - distributed measurement & control system modules are built , practices show that the standard networked smart sensor developed are available and the ieee1451 standard is preponderant 论文在标准校正模型基础上对传感器校正补偿方法进行了研究,包括数据插值、最小二乘以及神经网络方法。在方法研究的基础上基于matlab和vc + +环境开发了传感器模型建立软件,能够生成ieee1451标准的校正电子数据表格。在研制的网络化智能传感器基础上,构建了多个基于以太网的分布式测控系统模型,并且开发了系列支撑演示软件。
Consequently , based on the analysis of quad el transceiver working principle and the comparison of various processors " features , the author proposes the hardware design of quad el transceiver , and then introduces the time module , interface circuit of the system , storage system module , four channel el composer module , cpu module and time - interval exchange module respectively 然后,在分析了四路e1收发器的工作原理和比较了各类处理器特点的基础上,提出了四路e1收发器的硬件设计,分别介绍了时钟模块、系统接口电路、存储系统模块、四通道e1合成器模块、 cpu模块以及时隙交换模块。接着,在研究分析了g
Because the computer monitoring system for plcs plays a central role in the whole smg - iii intelligent control system , in this chapter , we show how to define the system modules based on analysis of smg - iii intelligent control system and the practical condition of shanghai minhang sports park . based on the partition of system modules , chap Plc上位机监控系统是整个“ smg -智能控制系统”的中枢神经,在该章中作者通过对“ smg -智能控制系统” 、工程目标以及系统整体结构的分析,结合上海闵行环城体育公园的实际情况,有针对性地提出了plc上位机监控系统的模块划分。
The mainly works had been done as follows : 1 . in order to keep commonality , the modules who have similar thermodynamic process had been classed . such as evaporating module ( including furnace , drum , system of boiler recycled water ) , single - phase heat exchange module ( including superheater , reheater , ecomomizer ) , lubricating oil system module ( can be used for any lubricating oil system of rotation mechanical impedance ) , pump and fan module , ect 本文所作的主要工作如下: 1 、为保证模块的通用性,对锅炉有相似热力环节的模块进行分类,建立模块库,便于模块调用,如蒸发区模块(包括炉膛、汽包和炉水循环系统) ,单相换热模块(包括过热器,再热器,省煤器等) ,润滑油系统模块(可用于各种转机轴承润滑油的动态特性的计算) ,泵与风机的动态计算模块等。