井间地震数据的期望净现值

勘探与开发项目的经济效益与远景构造评价中所用地震资料的成本及价值密切相关。那么，如何评估地震资料的价值？这里介绍一种评价井间地震数据期望净现值的方法，该方法可在地震测量之前估算其期望净现值，以确定地震测量的经济价值。     

THE INFLUENCE OF SCREEN PARAMETERS ON PERFORMANCE CHARACTERISTICS

A series of laboratory screening tests have been performed with the objective of evaluating the effect of feed rate, screen length and screen motion on the quality of separation. The separation performance has been evaluated by the use of proposed ISO Standard measures which are based on the partition curve. The laboratory rig, the test programme and results derived from it are discussed. The effect of screen length, feed rate and screen motion on the levels of screen performance as indicated by these measures and a normalised separation size parameter are discussed in relation to the assumed screening conditions for the tests reported and conclusions are summarised.     

伊泰普围堰施工采用的安全标准

一、引言本文介绍了为确定伊泰普工程围堰堰顶高程所采用的水文安全标准。这种安全标准是根据围堰使用的时间,以及如果洪水超过选定的标准而发生漫顶流量时可能的毁坏和施工时间损失确定的。伊泰普水电站施工围堰,包括截断巴拉纳河进行导流用的围堰和为进行导流渠内的厂房施工的围堰。     

SHOW场上的梦想

你看过Dog Show吗？如果你曾经亲身感受过Show场上紧张而热烈的气氛,有没有那么一刻,你幻想着亲自带狗在比赛场中大显身手？也许有很多人都会觉得,Handler(指导手)这个职业对于我们而言很遥远、很陌生、很新奇。如果你真的想尝试一把的话,其实也未尝不可。这不,梦工厂就迎来了这样一位梦想能够成为职业Handler带狗比赛的小帅哥。     

Plasma Discharge Initiation of Explosives in Rock Blasting Application： A Case Study

A plasma discharge initiation system for the explosive volumetric combustion charge was designed, investigated and developed for practical application. Laboratory scale experiments were carried out before conducting the large scale field tests. The resultant explosions gave rise to less noise, insignificant seismic vibrations and good specific explosive consumption for rock blasting. Importantly, the technique was found to be safe and environmentally friendly.