Different depth assignments and acoustic positioning let multiple underwater vehicles survey wide seabed areas with lower collision risk and better data accuracy.
Synchronized signal and reference coils subtract urban electromagnetic noise from transient EM data to improve underground detection accuracy.
An inter-lens shutter and DSP-integrated camera cuts jelly effect, weight, and size for more stable and accurate drone aerial mapping.
Global and local time-shift alignment improves well-seismic tie accuracy while reducing manual subjectivity and noise-driven calibration errors.
Target-dataset feedback and forward simulation help transient electromagnetic inversion handle unseen data with higher accuracy and lower overfitting.
Using first derivatives of horizontal electric field and vertical induced voltage, this case improves full-period resistivity imaging and removes source-shape effects.
Time-frequency conversion turns transient electromagnetic data into frequency-apparent resistivity for faster, more accurate 3D inversion of multi-source surveys.
Multi-scale wavelet features and a bidirectional LSTM automate stratigraphic division from logging curves with higher consistency and accuracy.
Electrical compensation current is adjusted from sensed coil conditions to cancel transmitter coupling and avoid rewinding after coil shift or deformation.
Stepwise global and local time-shift matching improves well-seismic tie accuracy while reducing manual subjectivity and calibration errors.
Processes pre-stack seismic gathers in the 3D τ-p domain to remove far-field directional wavelet effects, improving SNR with lower memory cost.
Switchable DPDT channel routing lets one electromagnetic receiver measure electric or magnetic signals for more flexible MT, AMT, and CSAMT surveys.
An oblique radar beam measures shielding length to calculate object height while keeping the antenna away from damaging wave impact.
Rigid aircraft mounting can misalign magnetometer and attitude axes; rotatable probes and coordinate correction improve vector accuracy.
Rigid mounting can misalign magnetic probes and attitude instruments; rotatable sleeves calibrate their spatial relationship for accurate vector measurement.
Seawater strengthens power-frequency signals for underwater ferromagnetic detection.
UMAP reduction and isolation forest processing remove abnormal logging points, stabilizing models for stratum identification.
FDIP transmitters and parallel acquisition use data-shape constraints to reduce interference in tunnel water-inrush imaging.
Parallel measurements across segmented electrode groups resolve low acquisition efficiency and cable complexity in irregular terrain.
A coaxial coplanar mutual reference coil assembly decouples additive motion noise from vertical magnetic field signals using dual independent sensing elements.
A magnetotelluric impedance estimation method applies Fourier transform and adaptive spectral attenuation to process electromagnetic time series data.
Vertical electric field gradient analysis combined with magnetic data enables precise seafloor electromagnetic surveying.
Central control processes array signals to locate maximum magnetic fields, resolving low productivity from manual tugboat or diver operations.
Spread spectrum signals improve frequency domain resolution and anti-interference capability by eliminating coupling distortion in geophysical exploration.
Electromagnetic emission and aerial reception map hidden karst pipelines, resolving false anomalies common in traditional geophysical surveys.
A towed electromagnetic streamer system collects passive field data via synchronized receiver measurements.
Inhomogeneous shot point distribution resolves the contradiction between system complexity and reliable reception of high-angle waves from steep dip faults.
Carbon fiber sensing elements minimize signal loss and prevent water ingress, enabling reliable detection in noisy ocean environments.
Parallel ADC channels and adaptive PMT gain control resolve signal saturation from water surface reflections while maintaining high precision.
Segmented housing and detachable ballast reduce deck space requirements while allowing up to 500 receiver assemblies.
A moisture detecting apparatus calculates ground resistivity across varied frequencies to determine water content via maximum-to-minimum value ratios.
A gamma ray spectrum unfolding method preprocesses elemental capture data to improve measurement precision.
A deep learning magnitude calculation module extracts frequency and waveform characteristics from raw distributed acoustic sensor strain data.
Principal component analysis separates near-field noise from far-field resource potentials, enabling accurate seafloor exploration.
Numerical simulations estimate NMR relaxation time cutoffs from core plug properties, avoiding time-consuming irreducible water saturation measurements.
Electromagnetic piston projector generates coherent acoustic waveforms using a symmetrical magnetic circuit to cancel reaction loads.
An underwater vehicle interlocking mechanism couples with seismic data acquisition units to enable continuous retrieval operations without landing.