8 results about "Linear probe" patented technology

The application discloses a self-supervised facial expression recognition method combining contrast learning and mask image modeling, and the method comprises the following steps: constructing a self-supervised facial expression recognition model combining contrast learning and mask image modeling; performing unsupervised pre-training on the model; performing linear probe evaluation and fine-tuning evaluation on the pre-trained model on a labeled verification set; using the fine-tuned model to perform facial expression recognition on an input facial image; the method learns facial expression representation through a convolution-free twin network, pre-trains the twin network by using contrast loss and mask image modeling loss, so as to simultaneously understand high-level visual semantics and image internal structure, and maximize the consistency between the outputs of the student network and the teacher network. The application can learn rich visual information, is robust to various interference unrelated to facial expression, and simultaneously achieves excellent results in linear probe and fine-tuning evaluation on a facial expression dataset.

This invention relates to the field of ultrasonic non-destructive testing technology for butt welds in special equipment, and particularly to an ultrasonic testing device and method for butt welds. The invention proposes an ultrasonic testing device and method for butt welds, comprising selecting a dual-channel phased array detector, connecting phased array linear probes with multiple array elements symmetrically distributed on both sides of the weld, the phased array linear probes being mounted on a probe holder, and each phased array linear probe being connected to a transverse wave wedge. This invention can realize multiple testing modes, including TOFD non-parallel D-scan, TOFD offset non-parallel D-scan, TOFD parallel B-scan, and phased array sector scanning. It aims to solve the technical problems of low testing efficiency and the need for multiple replacements of testing devices in existing ultrasonic testing of butt welds.

According to the present invention, there is provided an electrosurgical instrument comprising a hand-held portion and a probe portion releasably connected to the hand-held portion. The probe portion has a linear shape extending along a longitudinal probe portion axis and includes a bipolar or multipolar electrode configuration. The detection portion of the linear shape is releasably connected to the housing via an electro-mechanical interface. The handheld portion includes a self-receiving housing having a longitudinal axis and shaped as a handle. The housing accommodates electrical components of the electrosurgical instrument, including electrical components for generating an RF output voltage to be fed to the electrode configuration of the probe portion.

Disclosed herein is a system for electroporation of a rectal cancer tumor. The system includes a linear probe, an electrical pulse generator, and a processing unit. The linear probe includes a fixture body and two electrodes, two electrode adjustment sets, and a camera mounted on the fixture body. The camera is utilized to capture images and / or videos from the rectal cancer tumor and the electrodes. The two electrodes are connected to the electrical pulse generator. The processing unit is connected to the electrical pulse generator and the camera. The processing unit performs a method, including adjusting location of the two electrodes at both sides of a portion or whole of the rectal cancer tumor by capturing images and / or videos utilizing the camera and generating an electric field between the two electrodes by applying a sequence of electric voltage pulses between the two electrodes utilizing the electrical pulse generator.

The invention relates to the technical field of computer vision, and particularly discloses a cross-modal retrieval and linear detection optimization method based on a novel double-tower multi-modal model pre-training algorithm, and the method comprises the steps: constructing a double-tower multi-modal pre-training model, and carrying out the feature coding of an input image and text sample; introducing a hidden space sparse alignment framework SALS: segmenting the feature representation generated by the encoder into K different instances by a semantic uniformity module SUM, and introducing semantic separation loss; the sparse feature alignment module LSAM adopts a multi-head autonomous intention mechanism, and uses nonlinear transformation and a contrast loss function to extract and align shared information from a cross-modal instance; the implicit space equidistant regularization ER uses a geometric consistency target to ensure the consistency of features between an original sample and a disturbance copy thereof. According to the method, multiple typical downstream tasks are closely combined, and the technical problems of incomplete alignment and semantic noise interference between modals are systematically solved from the algorithm design level.

The invention discloses an ultrasonic probe fixing frame for nerve block, and relates to the technical field of medical instruments. The moving rod is mounted in the bottom frame in a sliding manner; the adjusting mechanism is mounted between the two sides of the top end of the moving rod; a probing mechanism; through cooperative work of the telescopic frame, the telescopic driving assembly, the adjusting frame, the first ultrasonic probe, the second ultrasonic probe and the guide block, the ultrasonic probes are stably fixed with the adjusting frame as the core, the telescopic driving assembly drives the telescopic frame to flexibly move, the adjusting frame accurately adjusts the angle and the distance between the two ultrasonic probes, and the ultrasonic probes can be stably fixed. And the low-frequency curved-surface probe and the high-frequency linear probe are combined, so that accurate three-dimensional space positioning is realized, the complex spatial relationship between cranial nerves and surrounding blood vessels and bones can be comprehensively displayed, synchronous scanning in different directions can be realized, a puncture path can be monitored in real time, accidental injury to the blood vessels or nerves is avoided, and serious complications such as bleeding and infection are prevented.

The invention discloses a probe, a probe head and chip testing equipment. The probe comprises a probe tail section and an insertion section, the insertion section is straight, and the insertion section is used for being inserted into a plurality of guide plates and comprises a probe tip used for being in contact with a test point of a tested object; the needle tail section comprises an elastic part, and the elastic part is connected with the insertion section and is opposite to the needle tip. By arranging the elastic part, the force value slope of the probe in the initial contact stage is reduced, and the problem that the force value of the probe in the initial contact stage quickly rises is well solved, so that the buffer effect is good, the problem that the probe deviates from an ideal contact point is reduced, in addition, the insertion section is straight, and the probe also has the advantages of a linear probe, for example, the insertion section is not prone to deformation. The needle inserting efficiency is not restricted, and the situation that the needle cannot be automatically planted is avoided.