p wave

The transmitting probe produces a pulse which causes a P-wave in the normal direction of the plane and a S-wave in its shear direction.

Ultrasonic P-wave transducer and ultrasonic single side method were used to determine concrete dynamic elastic modulus.

By looking at the first few seconds of a quake'; s P wave, they found they could predict how big the oncoming S wave would be.

However, the velocity of S-wave in a rock block with a large plane can be measured with the probes for P-wave.

Field surveys of the shallow refraction and microlog for both P-wave and S-wave have been made simultaneously in a work area.

The problem of a P wave incident vertically upon the contact interface has been experimentally studied.

Conclusion ECG P wave amplitude changes are a useful standard in evaluating hyperthyroidism therapy.

The change of the P wave velocity from upper crust to lower crust is consistent with the evolution history of the tectonic stress filed.

In other words, where the cavity filler is liquid, it has intense reflection of S-wave and P-wave.

During two years and nine months before the shock, increase of P wave residuals at this station lasted for one year and four months.

According to the theory of sequence stratigraphy, we established the stratigraphic and sedimental framework using P-wave seismic database.

For the tight sandstone containing gas, only velocity ratio of P wave to S wave and Poisson ratio are sensitive to fluid variation.

Get consistent rock parameters: P-wave velocity, porosity, and mineral properties of sands, fluid modulus and density.

Objective To observe ECG P wave amplitude changes before and after therapy in hyperthyroid patient and to explore its clinical significance.

In the paper we combine the P-wave source and three-component geophone to investigate the shallow fractures in the experimental area.

The results show that to achieve pseudo P-wave velocities, accurate interval velocity and angle gather data are necessary.

Single-wave AVO inversion mainly uses the P-wave or PS-wave to carry on parameter inversion.

In the recent years, lots of scholars have done some researches about fluid identification based on P-wave and S-wave.

P wave radiation patterns in transversely isotropic media are analyzed by using analytical and numerical methods.

The effective range of P-wave, S-wave, R-wave could be analyzed from the contours of dynamic stress.

Theoretically multi-wave exploration is certainly superior to pure P-wave exploration.

Recent developments provide four component (4C) seabed systems to record shear wave (S-wave) as well as P-wave energy.

The present thesis investigates the scattering problems of P-wave by circled cavities in near field by the method of FEM.

Three-component VSP data of P-wave source are applied to fracture detection.

The P wave, or compressional wave, alternately compresses and expands material in the same direction it is traveling.

The p wave can arrive seconds or even tens of seconds ahead of the more damaging S and surface waves.

The energy of these-wave is very low and is covered by p-wave, so we can't extracts-wave from multiple waves easily.

What leads should be utilized to analyze P wave information?

The group velocity delay of P wave was derived by using an improved multi-filtering method.

A novel method for P wave detection is presented in this paper based on location estimation and recognition post-processing.

What P wave information should be assessed?

Result As the patientis were getting better P wave turned normal.

Examine the derived dry P-wave modulus (Md) and shear modulus.

These variations show that a zone of decreased P wave velocity may be found in the crust and upper mantle beneath the station.

Meanwhile, some noninvasive surface EKG parameters such as P wave dispersion show promising application in the field of predicting AF.

We can follow a similar line of argument for the P-wave solutions.

At the same time, with help e of BP neural network, P wave is confirmed.

We can see the P wave amplitude and traveltime difference with the azimuth and incidence angle in numerical simulation.

Objective To study the relation between P wave dispersion, P wave width and paroxysmal atrial fibrillation.

Evaluation of the radiofrequency ablation of typical atrial flutter by change in the surface electrocardiogram P-wave polarity

Crustal P-wave velocity structure of the Dabie-Sulu ultrahigh-pressure metamorphic belt and mechanisms of its subduction and exhumation

Temporal changes in P-wave attenuation: A tale of two Californian earthquake rupture zones

Prediction of Thermal Conductivity of Underground Rocks from P-Wave Velocity of Ultrahigh-Pressure Metamorphic Rocks

Inverse crustal P-wave velocity model of Bohai bay basin and its adjacent area by using messy GA with Ground-Truth data

Analysis of Electrocardiogram P-wave or Auricular Systole Period of Hyperthyroid Patients Due to Yin Deficiency and Yang Excession

Analysis of relationship between P-wave dispersion and paroxysmal atrial fibrillation

Value of maximum P-wave duration and P-wave dispersion to the prediction of idiopathic paroxysmal atrial fibrillation

Relationship between paroxysmal atrial fibrillation and P-wave dispersion

Effects of metoprolol on P-wave dispersion in patients with chronic heart failure and dilated cardiomyopathy

The relationship between P-wave dispersion and paroxysmal atrial fibrillation

Determination of Dynamic Elastic Modulus of Concrete Using Ultrasonic P-Wave Transducer

Long-term effects of metoprolol therapy on P-wave dispersion in patients with congestive heart failure

Relation between P-wave dispersion and dilated cardiomyopathy

Extracting P-wave and S-wave Information for Full-wave Logging by Using Long-short Time Window Energy Ratio Method

The Application of P-Wave and S-Wave Velocity Inversion to the Identification of Gas Layer

P-wave Dispersion in Hypertensive Patients and Related Factors

Scattering of Steady P-Wave Around a Circular Cavity in Half Space Saturated Soil

The wavelet multi-scale simulation of P-wave wave equation in the two-phase media

Study on the Improvement of Measurement Precision of P-Wave Amplitude

The predictive value of P-wave dispersion in patients with atrial arrhythmia

Relation between P-Wave and QT dispersions in patients with heart failure

The Simulating and Characters of P-wave Seismic Record in the Fracture Medium

anisotropy comparison of p wave and s wave velocity for compacted rocks

Standard Test Method for Measuring the P-Wave Speed and the Thickness of Concrete Plates Using the Impact-Echo Method

Inverting reservoir fracture density using P-wave AVO data

A P-wave velocity and poisson ratio nonlinear inversion method

Magnitude estimation using the first three seconds P-wave amplitude in earthquake early warning

Scattering of steady P-wave around a circular lining in half space

Effect of dobutamine stress test on P-wave dispersion in elderly patients with angina pectoris

Numerical solutions of quasi-P wave equations in VTI media

Azimuthal AVO inversion of P-wave in fractured medium

Three Dimensional P-Wave Velocity Structure of the Crust of North China

P-Wave Velocity Structure of Crust and Upper Mantle in East Asia and West Pacific Marginal Seas

A P-Wave Detection Method Based on Wavelet Transform and Waveform Information

An Adaptive QRS-T Cancellation Based on Wavelet Transform for P-wave Detection