Results The direct signs of PTE in echocardiography were the thrombus echo in the main pulmonary artery and the right and left branches of pulmonary artery.
结果肺血栓栓塞症临床表现多样化，超声心动图直接依据是肺动脉主干及左右分支内血栓回声；
In a more direct flirtation with fantasy, Happy Net games echo the economic possibilities of real life.
开心网上的游戏模拟真实生活中的经济商机，使用户更直接地与幻想世界对碰玩乐。
The principle of direct sequence spread spectrum ranging is introduced and the echo model of near field ranging is discussed.
论述了直接序列扩频测距的原理，研究了近距离测距的回波模型。
When we use it to test the underwater target strength, one problem is how to discriminate the direct sound of the source with the echo reflected from the target, finding the target character quickly.
当利用它进行水下目标强度测试时，一个很实际的问题就是怎样区分声源直达声和目标反射回声，快速找出目标特性。
This method is greatly increased in the high-intensity direct wave interference under active sonar echo extraction accuracy.
该方法极大地提高了在高强度直达波干扰下主动声呐提取目标回波的精度。
According to characteristic of direct wave in PGPR echo, 2d filtering, matrix filtering and horizontal high pass filtering are tried to remove direct wave in PGPR echo.
针对PGPR回波中直达波的特性，尝试用二维滤波、模板滤波和水平高通滤波去除PGPR直达波并分析各个方法的利弊。
According to characteristic of direct wave in PGPR echo, 2d filtering, matrix filtering and horizontal high pass filtering are tried to remove direct wave in PGPR echo.
针对PGPR回波中直达波的特性，尝试用二维滤波、模板滤波和水平高通滤波去除PGPR直达波并分析各个方法的利弊。
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