相对于薄屏频率选择表面而言,厚屏频率选择表面可以通过高精度机械加工手段直接利用金属屏获得,加工方法简单。同时,厚屏频率选择表面具有更高的Q值和较少的介质匹配问题。在设
Objective: To evaluate the effect and safety of early moderate hypothermia therapy (MHT) on patients with head injury by using parallel-control test.rn Meth
医院过去许多年以来,由于片面强调操作技能而忽略患者的心理需要,服务意识淡漠,尤其是缺乏有效的护患沟通,让患者对护理人员产生误解,同时对患者的治疗和康复带来负面的影响.
Abdominaltuberculosisiscommonindevelopingcountries ,butgallbladderinvolvementisextremelyrare Thediagnosisofgallbladdertuberculosi
Abdominaltuberculosisiscommonindevelopingcountries, butgallbladderinvolvementisextremelyrare Thediagnosisofgallbladdertuberc
库德光路光束指向稳定性是保证激光测距机光轴指向精度的关键因素,通过坐标变换建立了一种可以从空间角度表征光束指向稳定性的动态方法,解决了大型激光测距机库德光路系统误差对光学系统影响的问题,将库德光路系统误差与光束指向有机地结合起来,以某地平式激光测距机为研究对象,建立了库德光路光束指向的动态误差模型。将CCD固定在库德镜5的安装接口处,并与图像采集卡组成图像采集系统,直接对库德光路激光光斑进行采集,
During construction or training at sea, wounds are commonly seen and irresistibly polluted by sea water. An early and proper treatment of wounds polluted by sea