Suitable amounts of Al(OH)3, Na OH and synthetic hematite or goethite were taken to be digested under the simulated condition of the Bayer process and subsequen
In order to realize the computer aided design of AT shifting element schemes, a mathematical model of shifting element schemes which can be easily identified by
使用实验方法观察分析了液固两相流对弯管冲蚀的形貌,通过建立ANSYS/LS-DYNA模型分析了液固两相流流速和角度对管壁冲蚀破坏的影响情况,结果表明:液固两相流对弯管冲蚀作用显
Radio frequency identification(RFID) is a ubiquitous identification technology nowadays. An on-chip high-performance transmit/receive(T/R) switch is designed an
In order to enhance the lead and zinc recovery from the refractory Pb-Zn oxide ore, a new technology was developed based on sulfidation roasting with sulphur by
Cloud computing has emerged as a leading computing paradigm,with an increasing number of geographic information(geo-information) processing tasks now running on clouds.For this reason,geographic infor
通过岩心观察、薄片鉴定等资料,明确了春风油田石炭系发育的岩石类型及其岩石学特征,分别从常规测井和成像测井两个方面对不同岩石类型的测井响应特征进行研究,并通过交会图法和Fisher判别分析方法进行岩性识别。研究结果表明:区内石炭系发育火山碎屑岩、火山熔岩、沉积岩三种岩石类型,不同岩性的常规测井和成像测井响应特征差异明显,通过GR-RD交会图版和Fisher判别方法识别岩性效果较好,识别结果与实际情况
塔中油田碳酸盐岩储层埋藏深度大、裂缝溶洞发育，井眼复杂程度高，钻井过程中，摩阻扭矩计算难度增加。应根据不同并段和不同钻柱段，选取相应计算模型：在造斜段及底部钻具组合段，采用
在本世纪，我国将步入老年型国家的行列。我国是在经济还不发达的情况下迎来人口老龄化的。这就决定了我国的养老方模式应该是，从我国的国情和传统文化出发，在建立和完善社会保障
The higher order displacement discontinuity method(HODDM) utilizing special crack tip elements has been used in the solution of linear elastic fracture mechanic