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- planar P waves 平面P波
- Seismic surveying is largely concerned with the primary P waves. 地震勘探主要研究一次纵波。
- C VSP logging data contains plenty of information about seismic waves such as P waves and converted S waves. VSP三分量测井记录含有丰富的地震波场信息 ,除纵波外还有转换横波资料。
- AVO phenomenon of seismic reflection waves can be seen in both P wave andP-SV wave. 地震反射波振幅随炮检距变化的规律(AVO)不仅P波存在,而且P-SV波也同样具有AVO特征。
- Amplification of P waves by flexible space is analyzed by exact dynamic-stiffness matrix of soil and half-space in frequency domain. 利用土层和半空间的精确动力刚度矩阵,在频域内求解并分析了弹性半空间场地对P波的放大效应。
- It established a new method to exhibit the phenomena of EMV through beat-to-beat analysis of the morphological changes of P waves, QRS waves and T waves. 建立了识别心电形态差异的新算法,克服了经典相关系数法识别灵敏度不高的弱点,明显提高了心电波形差异的检测灵敏度。
- Objective To study the relation between P wave dispersion, P wave width and paroxysmal atrial fibrillation. 目的研究心电图P波离散度、P波宽度与阵发性心房纤颤的关系。
- The P wave, or compressional wave, alternately compresses and expands material in the same direction it is traveling. 波,或称压缩波,在其传播过程中在同一方向交替压缩和拉伸介质(见上图)。
- LIANG Jian-wen, Yan Lin-jun, Lee V W.Scattering of incident plane P waves by a circular-arc canyon with a covering layer[J].Acta Mechanica Solida Sinica, 2002, 23(4): 397-411. [2]梁建文; 严林隽; Lee V W.;圆弧形凹陷地形表面覆盖层对入射平面P波的影响[J]
- Conclusion P wave maximum width or P wave dispersion is a dependable sign to predic... 结论P波离散度、P波最大宽度为一种预测阵发性心房纤颤的可靠指标。
- A series solution for surface motion amplification due to underground group cavities for incident plane P waves is derived by Fourier Bessel series expansion method. 采用波函数展开法,给出了平面P波入射下半空间中洞室群对地面运动影响问题的一个级数解答。
- About characteristics of P wave on ECGs these students were closer ordinarily healthy people than athletes. 以上现象男生较女生明显,体育专业学生的P波比运动员接近一般正常人。
- Conclusion ECG P wave amplitude changes are a useful standard in evaluating hyperthyroidism therapy. 结论心电图P波振幅的变化可以作为评价疗效的指标。
- The latencies of P wave evoked through nasal retina were more significantly prolonged than that through temporal retina (P<0.01). (2)半侧视野刺激斜视眼除鼻颞侧刺激P波潜伏期均延长外,同眼鼻侧视网膜P波潜伏期明显长于颞侧(P<0.;01);
- Meanwhile, some noninvasive surface EKG parameters such as P wave dispersion show promising application in the field of predicting AF. 一些无创的体表心电图指标如P波离散度等被认为能预测房颤的发生。
- A planar region bounded by a circle. 圆形区,圆形空间被圆所包围的一个平面区域
- The P wave impedance forward modeling technique is a conventional forward method based on reflection coefficient calculation. 波阻抗模型正演技术是一种基于反射系数计算的传统正演技术。
- The specificity of negative P wave in lead I and aVL that indentifed a left atrial focus was 100% and 95% respectively, but the sensitivity was only 30% and 50% respectively. I导联和aVL导联P波负向预测左房房速的特异性分别达到了 10 0%25和 95%25 ,但敏感性分别仅有 30%25和 5 0%25 ;
- A new simple approach to effectively detect QRS-T complexes in ECG curve is described, so as to easily get the P wave (when AF does not happen) or the f wave (when AF happens). 提出了一种简便有效的、由心电图(ECG)曲线提取QRS-T复合波的新方法,从而获得P波(当房颤未发生时)或f波(当房颤时);
- The flowing granular media are taken as weak transverse isotropic media,and the phase velocity expressions of P wave,SH wave and SV wave are deduced accordingly. 把流动中的散体看作弱横观各向同性介质,给出了P波、SH波和SV波的速度表达式,分析了它们在流动散体介质中的传播特点。
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