地下洞室超大流量、高水压集中出水点引排技术研究

"多、长、大、深"是未来隧道技术发展的总趋势。随着隧道长度增大,埋深增加,将不可避免地出现与之有关的高压、大流量涌水等施工地质灾害问题。以锦屏二级水电站东端2号引水隧洞发现的5+925、10+472两个集中出水点为依托,探索了地下洞室超大流量、高水压集中出水点引排技术。

加筋土坝渗透水引排技术研究

加筋(竹筋)复合土结构是一种新型支挡结构,对攀枝花学院新建的加筋(竹筋)土坝渗透水引排技术进行了研究,阐述了加筋(竹筋)复合土土坝渗透水引排设计要点及注意事项,实践证明该技术施工方便,排水效果良好,可有效保证加筋土坝质量。

中马村矿39051工作面涌水引排技术

针对中马村矿39051工作面受底板抽采巷底板水威胁情况,分析工作面周围巷道的关系,把威胁水源利用钻探技术引排至水仓,经过对底板水的有效引排,基本解决了工作面不受底板水威胁问题,增强了工作面安全生产的可靠性,创造了良好的经济和社会效益.

综放工作面上隅角瓦斯治理研究

本文针对矿井投产和达产两个不同生产时期,通过分析工作面上隅角瓦斯问题产生的原因,经试验验证,瓦斯引排技术及埋管瓦斯抽放技术分别做到了对上隅角瓦斯的有效治理。

A method for improving graph queries processing using positional inverted index (P.I.I) idea in search engines and parallelization techniques

The idea of positional inverted index is exploited for indexing of graph database. The main idea is the use of hashing tables in order to prune a considerable portion of graph database that cannot contain the answer set. These tables are implemented using column-based techniques and are used to store graphs of database, frequent sub-graphs and the neighborhood of nodes. In order to exact checking of remaining graphs, the vertex invariant is used for isomorphism test which can be parallel implemented. The results of evaluation indicate that proposed method outperforms existing methods.