Abstract A fracture network model is a powerful tool for characterizing fractured rock systems. In this paper, we present the by integrating machine learning algorithm in two-dimensional setting to predict natural topology porous media. We also use azimuth angle fault data from Kazakhstan. The results indicate that with LightGBM performs better designing parameter hidden areas based on known ar...

This paper presents a dual-band planar antenna array for ISM band applications (2.4 GHz and 2.45 GHz). This antenna is proposed for indoor applications and enables adaptive beamforming and angle of arrival (AOA) estimation. An adaptive beamforming algorithm is applied for a planar antenna array, which is able to steer its main beam and nulls in azimuth and elevation planes over a wide frequency...

The high squint diving SAR is widely used to provide the information in advance. Large squint angle deduces the deeper coupling of range and azimuth of SAR echoes which makes SAR imaging more difficult. Especially, the large range migration of the deep couple heavily burdens the imaging processing time and storage units. The diving motion of platform worsens the situation. This paper proposes t...

Many animals move so fast that there is no time for sensory feedback to correct possible errors. The biomechanics of the limbs participating in such movements appear to be configured to simplify neural control. To test this general principle, we analysed how froghopper insects control the azimuth direction of their rapid jumps, using high speed video of the natural movements and modelling to un...

The significant vertical heterogeneity, variations in ground stress directions, and irregular bedding interfaces make it extremely challenging to predict fracture propagation continental shale reservoirs. In this article, we conducted a series of triaxial laboratory experiments on outcrop rocks investigate the effects formation dip angle wellbore orientation crack under horizontal well conditio...

OBJECTIVE This work introduced judgment-based measures of spatial awareness and used them to evaluate terrain textures and fields of view (FOVs) in synthetic vision system (SVS) displays. BACKGROUND SVSs are cockpit technologies that depict computer-generated views of terrain surrounding an aircraft. In the assessment of textures and FOVs for SVSs, no studies have directly measured the three ...

BACKGROUND This study assessed the relationship between working memory capacity and auditory stream segregation by using the concurrent minimum audible angle in children with a diagnosed auditory processing disorder (APD). METHODS The participants in this cross-sectional, comparative study were 20 typically developing children and 15 children with a diagnosed APD (age, 9-11 years) according t...

Radio emission from cosmic ray air showers has the potential to become an additional, cost-effective observing technique for cosmic ray research, being largely complementary to the well-established particle detector and air fluorescence techniques. We present Monte Carlo simulatios of radio emission from extensive air showers in the scheme of coherent geosynchrotron radiation from electron-posi...

This paper presents a motion compensation algorithm which is capable of dealing with large motion errors for highly squinted spotlight SAR. The approach consists of a phase error compensation, a shift to correct the delay time error and an interpolation/resampling in azimuth. For pulsed SAR with a 30° squint angle, the proposed algorithm compensates motion errors that are 10 times greater than ...