A Novel Pre-compensation Scheme in Uplink MC-CDMA/TDD Systems;
上行MC-CDMA/TDD系统中的新型预补偿技术
This paper analyzes the standard of TD-SCDMA and elements of SA, and with homogeneous circular smart antenna of eight arrays as an example, examines TD-SCDMA uplink capacity from system level.
文中在对TD-SCDMA系统标准理解和智能天线原理分析的基础上,以8阵元均匀圆阵的智能天线为例从系统级对TD-SCDMA系统的上行容量进行了分析,结合仿真结果给出了智能天线对系统容量的影响。
Proposes a novel channel estimation algorithm for multi-carrier code pision multiplex access (MC-CDMA) systems on the uplink.
提出了一种新颖的适用于多载波码分多址接入(MC-CDMA)系统上行链路的信道估计算法。
Numerical analysis on ascending mining in coal seam group with shallow burying and near interval;
浅埋近距离煤层群上行开采数值分析
Study and application of ascending mining method in Daming No.1 Coal Mine;
大明一矿上行开采法的研究与应用
Under the instruction of this thought,the surface subsidence law and ascending mining law were analyzed and compared.
地下煤层开采,采场顶板垮落、覆岩沉降和破坏乃至地表沉陷变形是一个整体全过程,是一个统一系统,在此思想的指导下,对地表沉陷规律与上行开采过程中覆岩沉降规律进行了分析和比较,得知垮落带与断裂带高度是否进入到上层煤是煤层能否进行上行开采的关键,同时对影响上行开采的几大因素进行了分析。
According to the actual condition of geology and character parameter of rock mechanics,the feasibility on upward mining of 1-2 seam of yima mine was studied.
在伊吗矿实际地质条件和岩石力学性质参数的基础上,研究1-2煤层上行开采的可行性。
With the method of theory analysis and strata control observation,the mechanics of upward mining is studied.
通过理论分析与矿压观测等相结合的方法,研究上行开采的机理,掌握了采动压力的变化规律,确定了上下煤层采动影响的时空关系,及时采取相应措施,预计上行开采在安全控制方面的效果,为今后类似条件下进行上行开采提供宝贵资料。
Based on the comparison of advantages and disadvantages of descentional ventilation and ascentional ventilation,the author suggests exploiting descentional ventilation,which can not only reduce input funds,but also lower the density of gas gush at the stoping face.
本文通过对上行通风与下行通风的优缺点进行比较,提出在确保安全生产的前提下,采用下行通风,不但可以减少资金的投入,而且能够降低回采工作面瓦斯涌出浓度,减少煤尘飞扬,缩小污染范围等。