dependent adj. 1.依靠的,依賴的。 2.從屬的,隸屬的,【語法】從屬的。 3.由…決定的。 4.下垂的,懸吊的。 be dependent on [upon] 依靠,取決于。 n. 1.受贍養(yǎng)者,靠人生活的人。 2.扈從,侍從。 3.依存[從屬]物。 dependent clause 【語法】從屬子句[從句,分句]。 a dependent domain 領(lǐng)地。 He listed four dependents on his income-tax form. 他在所得稅表格上填寫了四個受贍養(yǎng)人。
Currently , fault data is transferred by telephone line using xmodem or zmodem protocol , which is often hardware dependent and not reliable 這種方式對硬件的依賴性高,組網(wǎng)復(fù)雜,維護難度較高,不能很好地適應(yīng)目前電力系統(tǒng)的發(fā)展需要。
In this paper , we firstly introduce the target hardware and software platform . then we make the porting plan beginning with analyzing the cross - platform developing and debugging technologies of embedded system software . later , we research the theory of the boot loader , the architecture of linux kernel and the design of linux device drivers , by dividing hardware dependent section from hardware independent section , esp 本文從嵌入式系統(tǒng)軟件的交叉開發(fā)與調(diào)試技術(shù)入手,闡述目標(biāo)軟硬平臺并提出移植方案,同時為本次移植工作建立交叉開發(fā)工具鏈;接著研究了系統(tǒng)引導(dǎo)程序的原理, linux內(nèi)核的體系結(jié)構(gòu)及設(shè)備驅(qū)動的設(shè)計,并將內(nèi)核中與硬件體系結(jié)構(gòu)相關(guān)的、特別是與系統(tǒng)移植相關(guān)的部分和體系結(jié)構(gòu)無關(guān)的部分區(qū)分開來。
After completing the overall design for both the server and the client , the author has implemented fundamental real - time communications functions , such as real - time message transmitting , the management of current user and user " s friend , etc . the major research and characteristics related to the realization of mycomm are , only ansi c / c + + and some system calls of mysql and qt are used so as to embody the thought of os - free ; the real - time response and network security issues are resolved by the introduction of mulit - thread and daemon programming mode , as well as the conversion of a clear text signal to a coded form in the data domain of udp packet ; in order to provide a friendly user interface , a series of shell - based system management commands in the server and skin - based programming techniques in the client are developed based on qt development tools ; to solve the hardware dependent configuration problem , all system files are packed into a rpm file which can be automatically installed , avoiding revise and recompile " makefile " manually , therefore , making the software upgrade and distribution much easier 在此基礎(chǔ)上,論文采用了商業(yè)大、中型軟件設(shè)計中常用的cvs版本控制,完成了mycomm系統(tǒng)服務(wù)器和客戶機的軟件總體設(shè)計,實現(xiàn)了諸如實時傳送消息、用戶管理、好友管理等網(wǎng)絡(luò)即時通訊的基本功能。本文的主要研究工作及其技術(shù)特點為:應(yīng)用ansic / c + +語言、 mysql和qt系統(tǒng)調(diào)用完成了系統(tǒng)軟件開發(fā),體現(xiàn)了與平臺無關(guān)的設(shè)計思想;引入了多線程及后臺守護進程的系統(tǒng)設(shè)計方法,對用戶消息原文經(jīng)過加密后放在udp報文中進行網(wǎng)絡(luò)傳輸,使該系統(tǒng)具有良好的時間響應(yīng)性和安全特性;在服務(wù)器端,為管理員提供了基于命令行的系統(tǒng)管理方式;在客戶機端,為了提供良好的人機交互界面,利用qt為開發(fā)平臺,采用了流行的“皮膚”設(shè)計方法;為適應(yīng)使用者計算機配置的差異,將所有系統(tǒng)文件打包制作成能自動安裝的rpm格式,用戶不須手工重新構(gòu)造和編譯makefile文件,因而更適合于linux環(huán)境下軟件的發(fā)行和更新。