Igg , igm , iga are produced by b cell , in the course of b cell ' s activation , it needs nk c ell ' s assistant . before thymus transplantation , the patient associated with tumor has fewer th cell and its function recedes , so b cell ' s activation was suffocated and the ability of producing ig was weak Igg ， igm ， iga由b细胞产生，而b细胞在活化的过程中，需要th细胞的辅助，胸腺移植前，由于癌症患者th细胞数量减少，功能低下，致使b细胞活化受阻，产生ig的能力低下。
This paper sums the situations and trends of domestic and international engineering machinery firstly , discusses the demands and implements of intelligent and long - range monitoring and controlling , and constructs a three - layer model of the engineering machinery long - range monitorin and control system : the front unit control systems , the machine - mounted monitoring system and the long - range control center ; proposes a kind of structure of embedded system based on c / os - ; dissects the characteristics , structure , operation and schedule principle of c / os - , modified the kernel , and improves dependability of the schedule algorithm ; designs the hardware in detail : the microprocessor at91rm9200 , the store unit , the serial interface , the human - computer interaction interface , the can bus control module , the debug interface and the reset circuit etc . ; on this basis , succeeds in transplanting c / os - to the system , sets up the operating system framework , designs the driver , sets up the institutional framework of upper user ' s application , provides the method and concrete application process of the graphical user interface module based on c / os - . the system designed in this paper , not only has the functions of local control , friendly human - computer interface , but also has various interfaces which make the system can be managed by the long - rang center 本文首先综述了国内外工程机械行业发展的现状和趋势,阐明了实施工程机械智能化及远程监控的意义和需求,并为此构建了工程机械远程监控系统三层结构模型:前端单元控制系统、车载监控系统和远程监控中心;提出了一种基于c / os -的嵌入式车载监控系统构建方案;深刻剖析了c / os -的特点、内核结构、运作机理、调度算法,在此基础上对其内核进行移植前的必要修改,并对其调度算法进行了可靠性改进;对构成嵌入式系统硬件的各个主要部分:嵌入式微处理器at91rm9200 、存储单元、串行接口、人机交互接口、 can总线控制模块、调试接口以及复位电路等做了详细的设计;在此基础上,成功地将c / os -实时内核移植到本文研发的嵌入式硬件系统中,建立了车载监控系统的操作系统体系结构,编写了该操作系统的底层硬件驱动程序,建立了上层用户应用程序的组织结构,并给出了图形用户界面模块化应用程序在c / os -操作系统上的建立方法和具体应用过程。
