lost update 中文意思是什麼
lost update
解釋
丟失修改-
Rapid prototyping technology changed the traditional pattern of product design, which could offer product sample for the designer, reduced design cycle and quicken the schedule of new product design, and it gave the decision - makers visual feeling. ; rp technology provided kinds of molds including resin - boncled mold laminate mold, investment mold and lost foam casting mold and so on for sand casting investment casting and cavityless casting, it could also use direct shell production casting to make pattern dies metal dies die - casting dies injection dies directly, and it could even produce casting products in small scales. the applications of fdm technology in plaster precision casting and the rapid casting technology based on sls technology were introduced, the organic combination between rapid prototyping tecnnology and foundry process, which initiated a new period of rapid manufacturing metal parts, by using advanced new technology alternated traditional foundry industry to make it looked brand - new, thus, the competition of foundry industry would be improved ; rapid prototyping technology offered a rapid economical feasible technical method, common processes of using rapid prototyping technology to produce dies were discussed, in the paper it explored that. the problem of combining rapid prototyping technology with electric arc metal - spraying technology to make metal dies and technics in dies manufacturing of combining rapid prototyping technology with precision casting, rapid tooling based on rapid prototyping, integrated advanced new technology and tradition technology of rapid prototyping manufacture, each superiority were exerted, rapid prototyping technology had been an efficiency measure to rapid update products and develop new product, and to middle -
快速成型技術改變了傳統的產品開發模式，可以為設計者提供產品樣件，縮短設計周期，加快新產品的開發進度，為決策者提供直觀性；快速成型技術迅速提供砂型鑄造、熔模鑄造、實型鑄造用的各種模樣，包括樹脂模、層壓模、熔模和消失模等，還可採用直接制殼鑄造法直接製造熔模鑄造用的壓型、金屬型、壓鑄型、注塑模，甚至直接製造小批量鑄件，介紹了熔積成型技術在石膏型精密鑄造上的應用和基於選擇性激光燒結技術的快速鑄造技術，快速成型技術與鑄造工藝的有機結合，開創了快速製造金屬零件的新階段，對用高新技術改造傳統的鑄造工業，使其面貌煥然一新，增強鑄造行業的競爭能力；快速成型技術為母模的製造提供了一條快速、經濟、可行的技術途徑，討論了利用快速成型技術製造模具的一般工藝方法，探討了將快速成型技術與金屬電弧噴鍍技術結合起來快速製造金屬模具問題，以及快速成型技術與精密鑄造技術相結合的模具製造工藝，基於快速成型製造的快速模具技術，集成了快速成型製造高新技術和傳統技術，發揮各自優勢，已成為產品快速更新換代和新產品開發及中、小批量生產的有效手段之一。 -
Lost update : one thread reads a record, a second thread updates the record, and then the first thread overwrites the second thread ' s update
線程1讀了一條記錄，線程2更新了一條記錄，接著線程1覆蓋了線程2的更新。 -
If the two transactions update rows using a single update statement and do not base the update on the previously retrieved values, lost updates cannot occur at the default isolation level of read committed
如果兩個事務使用單個update語句更新行，並且沒有按照以前的檢索值進行更新，則在設置為提交讀的默認隔離級別時，不會發生更新丟失。 -
Transactions must be run at an isolation level of at least repeatable read to prevent lost updates that can occur when two transactions each retrieve the same row, and then later update the row based on the originally retrieved values
當兩個事務中的每個事務都要檢索相同的行，然後又根據最初的檢索值更新行時，可能發生更新丟失。此時，事務必須至少以的可重復讀的隔離級別運行，以防止更新丟失。 -
Install this update to resolve an issue where when adding metadata to raw images from canon eos - 1d or eos - 1ds cameras, the file is truncated and the image is permanently lost
安裝此更新可以解決從canon eos - 1d或eos - 1ds相機將中繼資料加入raw影像時，檔案被截斷以及影像永久遺失的問題。 -
The update will mostly consist of security updates but also include updates to packages that got lost during the freeze of woody and fix some broken packages
更新版的內容主要是安全性更新，但它也包含了一些來不及納入woody的套件，以及問題套件的修正。 -
Other than interruptio arising from the maintenance of server or regular update, the company agrees to compe ate the su criber in an amount of time equal to twice as the time lost attributable to the fault of the company
4由於本公司除維護服務器、添加資料等事項外的其它原因造成信息檢索服務中斷，本公司將雙倍補償會員中斷的時間。 -
Install this update to address an issue in which storing files with extended attributes on volumes enabled for single instance storage may result in the extended attributes being lost as duplicates files are found and moved into the sis common store
安裝本更新程序可以解決這樣一個問題：如果將具有擴展屬性ea的文件存儲在為單實例存儲sis啟用的卷上，則發現重復的文件移動到sis公共存儲中時，可能導致擴展屬性丟失。
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