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 據文獻記載, 1985年6月發生的新灘滑坡給國家造成直接經濟損失達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 摘要本文從基礎統計要素、咨詢記錄的分析統計要素、用戶滿意度程度統計要素和成本統計要素等四個方面比較全面地列舉和分析了虛擬參考咨詢服務的統計指標,闡述了每個要素的計算方法和主要作用,并指出了對虛擬咨詢服務統計實用要素進行分析的目的是對其運行績效進行動態評價。