Seismic data interpolation is an essential procedure in seismic processing. However, conventional methods may generate inaccurate results due to the simplicity of assumptions, such as linear events or sparsity. In contrast, deep learning trains a neural network with large set without relying on predefined assumptions. lack physical priors traditional pure data-driven frameworks cause low generalization for different sampling patterns. Inspired by framework projection onto convex sets (POCS),...

The East Kunlun Orogen (EKO) in the northern Tibetan Plateau records two continental collisional orogenic events and magmatism early Paleozoic Mesozoic. However, possible magmatic additions to crust growth of EKO different tectonic stages orogeny have been overlooked. Three phases plutons from Xiangride-Kuhai area east chosen for detailed investigation results are reported here. oldest suite (Stage 1) includes ca. 471 Ma Qurelong Monzodiorite 454 granodiorite Zhiyu Intrusive Complex....

Abstract Permian–Triassic boundary (PTB) volcanic ash beds are widely distributed in South China and were proposed to have a connection with the PTB mass extinction assemblage of Pangea. However, their source tectonic affinity been highly debated. We present zircon U–Pb ages, trace-element Hf isotopic data on three new-found western Hubei area, China. Laser ablation inductively coupled plasma spectrometry dating zircons yields ages 252.2 ± 3.6 Ma, 251.6 4.9 Ma 250.4 2.4 for these beds....

Abstract Collision of the South and North China cratons was an important event in eastern Asia contributed to formation Central Orogenic Belt China. While timing collision has been documented west (at West Qinling Belt) east Dabie Mountains), little is known regarding middle sector zone. We present field, sedimentological, mineralogical, geochemical data from Late Permian Dalong Formation Early Triassic Daye (lower part) Western Hubei Trough which located northern Craton. Based on...

The intraplate Kwangsian Orogeny is a key orogenic event in South China the mid-Paleozoic. We re-examined evidence for Yichang Uplift, an inferred geographic feature during Orogeny, to evaluate its timing and nature. Field, sedimentological, mineralogical geochronological data were collected from Late Ordovician-Early Silurian Xiaohe section, Hunan-Hubei area. Results suggest that section composed of Ordovician Wufeng Formation black shale lower part Early Longmaxi upper part. found clay...

Abstract. Sea surface partial pressure of CO2 (pCO2) data with high spatial-temporal resolution are important in studying the global carbon cycle and assessing oceanic uptake capacity. However, observed sea pCO2 usually limited spatial temporal coverage, especially marginal seas. This study provides an approach to reconstruct complete field South China (SCS) a grid 0.5º × over period 2000–2017 using both remote-sensing derived pCO2. Empirical orthogonal functions (EOFs) were computed from...

Abstract. Sea surface partial pressure of CO2 (pCO2) data with a high spatiotemporal resolution are important in studying the global carbon cycle and assessing oceanic uptake. However, observed sea pCO2 usually limited spatial temporal coverage, especially marginal seas. This study provides an approach to reconstruct complete field South China (SCS) grid 0.5∘×0.5∘ over period 2000–2017 using both remote-sensing-derived underway pCO2, among which gridded 2004, 2005, 2006 presented for first...

In seasonally frozen regions, road construction often suffers from low strength,lack of durability, etc. Improving the typical clay’s workability in Changchun with lime and Base-Seal stabilizer (BS-100) shows promising results. A comprehensive investigation to assess soil characteristics influence is undertaken, so as liquid content on physical properties stabilized soils regions. The optimum mix proportions, unconfined compressive strength, splitting modulus resilience, freeze-thaw action,...

The line-of-sight (LOS) stabilization control based on gyro stabilized platform is required to isolate LOS from the movement and vibration of carrier ensure pointing tracking for target in electro-optical system. In this paper, a fractional-order PI (FOPI) controller applied design loop system first time, analysis fractional calculus theory. This exhibits excellent performance even presence nonlinearity uncertainty. Details along with comparisons between FOPI conventional integer-order...

The folding wing deployment mechanisms of aircraft are constrained by weight and space limitations, necessitating fewer actuators, multiple outputs, compact designs, high efficiency. However, existing often overlook the impact performance in configuration design. Additionally, they struggle to achieve synchronous unfolding wings using a single drive. This paper presents design methodology for multi-wing based on topology indicators. Specifically, seventeen configurations developed functional...

This paper has studied and analyzed the tracking control problem of flexible hypersonic vehicle with external disturbance model parameter uncertainties. Firstly, modes, uncertainties are regarded as unknown bounded lumped system disturbance, non-linear is divided into velocity sub-system altitude sub-system. Secondly, robust adaptive back-stepping controllers designed for using method technology, respectively. Finally, stability strategy proved by Liapunov theory indicates that state...

This paper focuses on the sensor placement strategy for a hypersonic vehicle with elastic effects. A rate gyroscope is modeled to measure pitch of vehicle. Since effects being considered, measured would be affected by mode shape vehicle, resulting in difference between real and rate. states cannot directly, this develops enhance observability system. Then, applying vehicle's velocity altitude as reference tracking commands, an output feedback control law observer Simulation results different...

This paper focuses on the control design and simulation for a hypersonic vehicle with elastic effects. The main characteristic of such vehicles is strong coupling between airframe dynamics propulsion systems. What's more, rigid body during flight must be considered when designing controller. first derive flexible mode shape vehicle, calculate vibrational frequency under different conditions, will affect bandwidth while change inertia coefficients. Then, by applying vehicle's velocity...

This paper describes a new method for modeling the flexible mode of scramjet hypersonic vehicle. The vehicle is affected by axial tension/pressure and velocity field during flight, thus will perform some different characteristics when compared with those under influence static field, deduce expression model frequency respect to it, then providing analytic result. Additionally, this considers phenomenon mass variation then, reveals relationship between shape. Based on modeling, simulation...

Abstract Accurate real-time characterization of complex channel sand reservoir is very critical for horizontal well drilling and production improvement. CB block located in the southwest part Bohai Bay which main offshore SINOPEC Sheng Li. This featured by braided river fluvial deposition environment. The operator faced challenges during drilling, such as thin channels, inner-beds development, severe lateral change, unstable structure low connectivity. A campaign was launched 2021. Through...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1999Numerical modelling energy reflection in stratified anisotropic mediaAuthors: Yao ChenChen XiangguoYao ChenInstitute of Geology CSB, China and Chen XiangguoInstitute Geophysics, Chinahttps://doi.org/10.1190/1.1820917 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1820917FiguresReferencesRelatedDetails SEG...