Due to the continuous progress of techlnology and fast increment of information capacit } r , especially the development of network technology and multi - media technolog } r . data process has transformed from the traditional rnode to a nex ' ! - stvle mode . for instance svstematic structure transformed from terminal host computer rnode to client / server struct - ure mode , network circumstance transformed from lan to internet 隨著技術(shù)的不斷進步和信息量成倍地增加,特別是網(wǎng)絡(luò)技術(shù)和多媒體技術(shù)的發(fā)展,使信息處理從傳統(tǒng)模式向新型模式轉(zhuǎn)變,如體系結(jié)構(gòu)從終端主機方式到客戶服務(wù)器結(jié)構(gòu)方式、網(wǎng)絡(luò)環(huán)境從局域網(wǎng)到internet等開放網(wǎng)、信息結(jié)構(gòu)從結(jié)構(gòu)化到非結(jié)構(gòu)化等,這些變化必將促使信息檢索技術(shù)的研究和不斷發(fā)展,以滿足人們對提高信息獲取能力的需要。