References records show that xintan complex landslide brought about directly the economic loss over 8700 thousand yuan to the country and the yanchihe rockfall what happened in tune in 1980 , extended 285 men to lose the life 據(jù)文獻(xiàn)記載, 1985年6月發(fā)生的新灘滑坡給國(guó)家造成直接經(jīng)濟(jì)損失達(dá)8700萬元以上, 1980年6月鹽池河磷礦巖崩,致285人喪生。
From four aspects of basic statistic element , reference record analysis statistic element , user ' s satisfaction degree statistic element and cost statistic element , the author lists and analyzes statistic indexes in virtual reference , illustrates the calculating method and main function for each element , and points out that the purpose of analysis on statistic practical elements is to evaluate dynamically the performance of virtual reference system 摘要本文從基礎(chǔ)統(tǒng)計(jì)要素、咨詢記錄的分析統(tǒng)計(jì)要素、用戶滿意度程度統(tǒng)計(jì)要素和成本統(tǒng)計(jì)要素等四個(gè)方面比較全面地列舉和分析了虛擬參考咨詢服務(wù)的統(tǒng)計(jì)指標(biāo),闡述了每個(gè)要素的計(jì)算方法和主要作用,并指出了對(duì)虛擬咨詢服務(wù)統(tǒng)計(jì)實(shí)用要素進(jìn)行分析的目的是對(duì)其運(yùn)行績(jī)效進(jìn)行動(dòng)態(tài)評(píng)價(jià)。