H . 323 can make the intercommunication between ip and telephone network more easily than sip for its signalling mode refers to existing telephone system . so the designed ip telephone system is based on h . 323 protocol stacks 由于h . 323協(xié)議棧借鑒了已有的電話系統(tǒng)的信令方式,它使得ip網(wǎng)絡(luò)和已經(jīng)存在的電話網(wǎng)絡(luò)的互通比采用sip更容易,所以,本文以h . 323協(xié)議棧為基礎(chǔ)實現(xiàn)ip電話系統(tǒng)。
In the traditional television - broadcasting field , the tv programs are saved in the cassettes with the analog signal mode and the cassettes ’ abrasion is caused by over used , so the signals on them will become weaken and even lost , finally leading to broadcasting error 在傳統(tǒng)電視行業(yè)中,采用模擬信號的磁帶工作方式,而磁帶的長期使用引起的磁帶磨損會造成信號的減弱甚至永久性遺失,導(dǎo)致播出故障。
The input value of static weighing system is instant and the interference is small . nsr is high , then interference signal is ease to dispose . while dynamic weighing systems have different signal modes , yawp interference magnitude size and mode when it is in different facilities and different testing objects . in this thesis has optimum attempt in this point and find a solution which has perfect practicality 動態(tài)定量稱量技術(shù)是一項很有前景的技術(shù),在我國發(fā)展也有很久了,但是這方面的技術(shù)還是不成熟,由于動態(tài)比靜態(tài)稱量要復(fù)雜得多,靜態(tài)稱量由于輸入值是恒定、干擾小、信噪比大,干擾信號易處理;而動態(tài)稱量系統(tǒng)對不同的設(shè)備、不同的測試對象產(chǎn)生的信號形式、噪聲干擾大小、方式均不同。