Abstract Based on the investigation and analysis of the situation in full mechanized coal mining face at home and abroad, the electro- hydraulic control system for hydraulic support is put forward, designed and realized。 It adopted intrin...
Abstract: Solid backfilling mining can reduce the buildings damage caused by mining greatly。 The reduction of subsidence value, the slow advancing speed and the subsidence caused by backfilling body compaction are the main reasons that so...
Abstract Product quality for plastic injection molding process is highly related with the settings for its process parameters. Additionally, the product quality is not simply based on a single quality index, but multiple interrelated qualit...
Concurrency Control The major disadvantage of locking a data item corresponding to the relation, or locking an entire index,is the low degree of concurrencytwo transactions that insert different tuples into a relation are prevented from exe...
The analysis pass finds the last complete checkpoint log record, and reads in the DirtyPageTable from this record. It then sets RedoLSN to the minimum of the RecLSNs of the pages in the DirtyPageTable. If there are no dirty pages, it sets R...
Database Development Process Many more database development project is the bottom-up approach emerging, such as information system user needs specific information to complete their work, thus beginning a project request, and as other inform...
Designing an electronic commerce interface: attention and product memory as elicited by web design Material Source: Division of Management Information Systems, Sauder School of Business, University of British Columbia, Vancouver, B。C。V6...
The Java Server Pages( JSP) is a kind of according to web of the script plait distance technique, similar carries the script language of Java in the server of the Netscape company of server- side JavaScript( SSJS) and the Active Server Page...
摘要 级进模具的设计是一个非常知识密集型的、复杂的、耗时的过程。本文介绍了一种设计级进模具结构的，具有拉、伸弯曲和冲孔运算的计算机辅助设计系统。该系统能利用预先构建...
逐行冲压是一种经济高效且安全的生产部件的方法。仔细设计和建造模具将确保最佳性能。Arnold Miedema国会概念与工程公司，怀俄明州，密歇根州 在每个冲压冲程期间，渐进式模具在模...
