A kind of ultra wideband (UWB) antenna, which consists of an arm-folded dipole antenna and a dielectric block, is proposed.
介绍了一种由折叠臂偶极天线和并联介质块组成的小型化超宽带天线。
We forecasted potential of gold mine resource in Wulaga Au geochemical block in the north of Jiamusi block by using the method of ultra-low density geochemical survey.
运用超低密度地球化学调查方法，对佳木斯地块北缘乌拉嘎金地球化学块体的金矿资源潜力进行了预测。
Shu1 area of Shuguang oilfield has abundant ultra heavy oil reserves and is an important production superseding block of Liaohe oilfield.
曙光油田曙一区超稠油储量丰富，是辽河油田重要的产能接替区块。
Peripheral oilfields are also the main direction to increase recoverable reserves, but 90% reserves are located in ultra-low abundance, ultra-low permeability and complex fault-block reservoirs.
外围油田也是增加可采储量的主要方向，但90%的储量位于特低丰度、特低渗透及复杂断块油藏。
Coalface of Daizhuang Coalmine, the authors believe that the roof in lower seam will form the "block-bulk-beam" structure easy to fall after the mining of top ultra-close seam.
通过对岱庄煤矿4300采区工作面的顶板结构分析，得出了上部极近距离煤层开采后，下部煤层顶板形成极易漏冒的“块体-散体-梁”结构。
Coalface of Daizhuang Coalmine, the authors believe that the roof in lower seam will form the "block-bulk-beam" structure easy to fall after the mining of top ultra-close seam.
通过对岱庄煤矿4300采区工作面的顶板结构分析，得出了上部极近距离煤层开采后，下部煤层顶板形成极易漏冒的“块体-散体-梁”结构。
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