Abstract: A method for imaging tissues behind obstacles includes following steps: (1) providing an ultrasound array transducer that includes at least four active elements; (2) spraying a data sample of an ultrasound beam along an impulse response curve into an output image domain; (3) binning each point on the impulse response curve by a value of an unique attribute; (4) summing an image value at the each point on the impulse response curve into a corresponding partial image volume associated with the unique attribute; (5) repeating steps (2)-(4) for all data samples of all ultrasound beams to obtain a plurality of partial image volumes; (6) sorting the partial image volumes by the unique attribute to generate common image point gathers; and (7) obtaining an image of the tissues by stacking common image point gathers at all output locations.

Abstract: The present disclosure provides a positive electrode active material, a sodium-ion battery and a preparation method therefor and an electrical device, relating to the technical field of secondary batteries. The positive electrode active material includes a polyanionic material and Na4Fe3(PO4)2P2O7, a mass of the Na4Fe3(PO4)2P2O7 being 40% to 60% of a mass of the positive electrode active material. In the present disclosure, the polyanionic material and Na4Fe3(PO4)2P2O7 are compounded as the positive electrode active material. The two materials cooperate with each other, so that the positive electrode active material has a high diffusion coefficient of Na+, a high energy density and excellent cycle stability at a low temperature, which is beneficial to improving the low-temperature service performance of the sodium-ion battery.

Abstract: An ultrasound system includes: a V-wave ultrasound data acquisition system with a transducer that includes an array of transducer elements, the array of transducer elements including a first sub-array and a second sub-array; a V-wave ultrasound beamformer to receive ultrasound beams from the V-wave ultrasound data acquisition system and generate ultrasound images; and an ultrasound image display to render the ultrasound images locally or transmit the images over internet.

Abstract: A method of acquiring ultrasound radio-frequency data includes providing an ultrasound transducer; providing an ultrasound data acquisition system; transmitting ultrasound beams using a transmission function of the ultrasound transducer and ultrasound data acquisition system; receiving the ultrasound beams using a reception function of the ultrasound transducer and the ultrasound data acquisition system; recording raw radio-frequency data with the ultrasound data acquisition system; sending the raw radio-frequency data to a processing unit; and deblending the raw radio-frequency data into individual ultrasound beam records. The ultrasound beams are transmitted in such a way that a subsequent ultrasound beam is transmitted before a previous ultrasound beam is received by the ultrasound transducer, and the ultrasound beams are overlapping in time in accordance with a first pseudo random sequence and overlapping in space in accordance with a second pseudo random sequence.

Abstract: A method for generating F-mode display of an ultrasound image includes: collecting ultrasound image data that include a plurality of physical properties; mapping the physical properties to a plurality of color components of a color space; and combining the color components to generate an F-mode display of the ultrasound image. Each of the physical properties corresponds a corresponding color component.

Abstract: A method of acquiring ultrasound radio-frequency (RF) data using C-wave beams includes: providing an ultrasound transducer, the ultrasound transducer including a plurality of elements acting as both transmitters and receivers; transmitting sound waves from the transmitters of the ultrasound transducer within a transmit aperture with transmitter time delays being programed in such a way that sound waves are the C-wave beams that bend inward on both edges in a C shape; and receiving the sound waves using the receivers of the ultrasound transducer. The coherent wavefront includes a variable tilt angle and a variable apex, and the variable apex moves away from a center of the ultrasound transducer as the variable tilt angle increases in absolute value. A system for acquiring and processing ultrasound radio-frequency (RF) data using C-wave beams is also disclosed.

Abstract: A system and method for acquiring and beamforming ultrasound data using focusing beams includes: providing an ultrasound transducer, the ultrasound transducer including a plurality of elements; transmitting ultrasound beams from the elements in such a way that sound waves arrive at a focal point at different times but within predetermined time differences, the differences being (i) small enough such that the in-sonification at the focal point is strong to overcome noises and attenuation of echo signals caused by tissue absorption, and (ii) large enough to avoid a constructive interference of the sound waves at the focal point; receiving raw RF ultrasound data using at least a subset of the elements for each beam; beamforming the RF ultrasound data to obtain an image; displaying the image or sending the image to a remote device. Ultrasound scanners using focusing beams can achieve excellent image resolution and signal-to-noise ratio, significantly reducing safety concerns.

Abstract: A method for obtaining a sound speed image is disclosed. A reflectivity value and a sound speed value at every image point are obtained at the same time. Together they can be used to perform more detailed characterization of tissues and organs under examination. A method for obtaining a spatially varying Poisson's ratio distribution is also disclosed. A reflectivity value and a Poisson's ratio value at every image point are obtained at the same time. Together they can be used to perform more detailed characterization of tissues and organs under examination.

Abstract: An ultrasound system includes: a V-wave ultrasound data acquisition system with a transducer that includes an array of transducer elements, the array of transducer elements including a first sub-array and a second sub-array; a V-wave ultrasound beamformer to receive ultrasound beams from the V-wave ultrasound data acquisition system and generate ultrasound images; and an ultrasound image display to render the ultrasound images locally or transmit the images over internet.

Abstract: A method for imaging tissues behind obstacles includes following steps: (1) providing an ultrasound array transducer that includes at least four active elements; (2) spraying a data sample of an ultrasound beam along an impulse response curve into an output image domain; (3) binning each point on the impulse response curve by a value of an unique attribute; (4) summing an image value at the each point on the impulse response curve into a corresponding partial image volume associated with the unique attribute; (5) repeating steps (2)-(4) for all data samples of all ultrasound beams to obtain a plurality of partial image volumes; (6) sorting the partial image volumes by the unique attribute to generate common image point gathers; and (7) obtaining an image of the tissues by stacking common image point gathers at all output locations.

Abstract: A method for generating F-mode display of an ultrasound image includes: collecting ultrasound image data that include a plurality of physical properties; mapping the physical properties to a plurality of color components of a color space; and combining the color components to generate an F-mode display of the ultrasound image. Each of the physical properties corresponds a corresponding color component.

Abstract: Described herein are implementations of various technologies for a method for processing seismic data corresponding to a region of interest. The method may receive the seismic data. The method may separate the received seismic data into refraction packets and reflection packets. The method may receive a model for the region of interest. The method may update a first portion of the received model using the refraction packets with refraction traveltime tomography. The method may use the updated model to facilitate hydrocarbon exploration or production.

Abstract: Described herein are implementations of various technologies for a method for processing seismic data corresponding to a region of interest. The method may receive the seismic data. The method may separate the received seismic data into refraction packets and reflection packets. The method may receive a model for the region of interest. The method may update a first portion of the received model using the refraction packets with refraction traveltime tomography. The method may use the updated model to facilitate hydrocarbon exploration or production.

Abstract: Methods, software, and computer systems for 3D multiple prediction and removal are disclosed. The method includes determining a set of input diplets. The method includes, for one or more data diplets from the set of input diplets downward propagating the data diplet to model reflection of the data diplet at a location of at least one subsurface discontinuity and determining one or more predicted multiple diplets, based, at least in part on the data diplet and the modeled downward propagated and reflected diplet. The method includes comparing diplets in the set of input diplets with the one or more multiple diplets to determine a set of multiple diplets and a set of demultipled diplets.

Abstract: Methods, systems and software for generating a multi-dimensional volume are disclosed. The methods include decomposing one or more original volumes into a collection of diplets, wherein each diplet includes information about spatial location, orientation, amplitude, wavelet, acquisition configuration, and coherency. The methods further include migrating the collection of diplets using one or more of a velocity model or an anisotropic velocity model, and synthesizing one or more of the migrated diplets to an output multi-dimensional seismic volume.

Abstract: Methods, systems, and software for determining a seismic image of a target area are disclosed. The target area is defined by a volume of interest (VOI). The method includes receiving an unmigrated set of spatial wavelets, wherein the unmigrated set of spatial wavelets include unmigrated spatial wavelets in the time domain. The method includes receiving a first migrated set of spatial wavelets, wherein the first migrated set of spatial wavelets includes migrated spatial wavelets in the depth domain. Each spatial wavelet comprises information about spatial location, orientation, amplitude, wavelet, acquisition configuration, and coherency. Each spatial wavelet in the unmigrated set of spatial wavelets is linked to a spatial wavelet in the first migrated set of spatial wavelets.

Abstract: Methods, systems, and software for representing seismic shot or receiver data as a superposition of a plurality of diplets are disclosed. The method includes decomposing one or more prestack shot or receiver records into a set of diplets, migrating the diplets using one or more velocity models, and synthesizing one or more migrated diplets into a migrated seismic volume, wherein each diplet comprises information about spatial location, orientation, amplitude, an associated wavelet, acquisition configuration, and coherency.

Abstract: Methods, systems and software for generating a multi-dimensional volume are disclosed. The methods include decomposing one or more original volumes into a collection of diplets, wherein each diplet comprises information about spatial location, orientation, amplitude, wavelet, acquisition configuration, and coherency. The methods further include migrating the collection of diplets using one or more of a velocity model or an anisotropic velocity model, and synthesizing one or more of the migrated diplets to an output multi-dimensional seismic volume.

Abstract: Methods, systems, and software for generating a multi-dimensional volume are disclosed. The methods include decomposing one or more original volumes into a collection of diplets, wherein each diplet includes information about spatial location, orientation, amplitude, wavelet, acquisition configuration, and coherency. The methods further include migrating the collection of diplets using one or more of a velocity model or an anisotropic velocity model, and synthesizing one or more of the migrated diplets to an output multi-dimensional seismic volume.