費識本《周禮》的兩重性質

《周禮》一經存在南宋撫州本、余仁仲本、十行本等重要版本亡佚,存世宋刻又有殘闕的情况。國家圖書館藏費念慈題識本宋刻《周禮》全帙,頗具價值而所受關注較少。本文重點揭示了費識本的性質,認爲此本既有近於建陽坊刻本系統,也有近於國子監刻本系統的現象。這種兩重性質,説明該本可能處於監本系統與建本系統之間的狀態。其中保留了來源較早的文本,值得重視。文末還討論了相較於文禄堂舊印本,國家圖書館出版社新印費識本的特點。舊印本難以將原刻與朱筆、墨筆同時準確呈現,而新印本更能忠實體現原書不同層次的豐富信息,爲讀者提供更爲準確的文本依據。

Development of an automated system for continuous monitoring of powered roof support in longwall panel

Described the development of an Intrinsically Safe System for continuous monitoring of load and convergence of powered roof supports installed at Iongwall faces. The system developed for monitoring of behavior of a powered support in a mechanized Iongwall sublevel caving face. The logging system can be programmed for logging the data from the sensors at different logging intervals ranging from 16 h to 1 ms for logging variation in hydraulic pressures in legs and convergence of the support during progressive face advance. For recording dynamic loads, the data logger can be programmed to start fast logging, say at 10 ms intervals, when the pressure in a leg reaches a pre-specified threshold value, and continue fast logging until the pressure drops below this threshold value. This fast logging automatically stops when the pressure drops below this threshold value.

蜀石經《春秋經傳集解》殘拓校理

國家圖書館藏蜀石經《春秋經傳集解》殘拓包括卷十五襄公十年至十五年經傳、卷二十昭公二年傳文。本次校理以1926年劉體乾影印本爲底本;襄公部分參校寫本三種、刻本十四種,昭公部分參校寫本一種、刻本十二種。其間注意吸取寫本中的校記文字,注意分辨刻本中的原版、補版、修版等版片情形;既重視作爲結果的文本異同,也重視作爲過程的文本變化;而在文本變化中又特别留意突變的發生,文本突變雖是原有關係鏈條的終結,但也可能是新的關係鏈條的開啓。本項工作是探討蜀石經《左傳》性質的基礎,同時也期待爲梳理《左傳》版本源流關係提供更多的細節佐證。緣此,本篇對參校本異文盡量一一出校,包括明顯由參校本自身訛誤所致者。另外文中未定校勘凡例,旨在保留每條校理文字面對具體情况時的靈活性。