38 results about "Stimulus pattern" patented technology

The invention belongs to the technical field of biomedicalengineering and information, in particular to a brainprint identity identification authentication method based on a multi-characteristics algorithm. By fully utilizing characteristic fusion, different brain wave signals are generated by training a trainee with different stimulus patterns; the brain wave signals generated by the stimulus are analyzed by using a multi-characteristic extraction method, the extracted individual characteristic signals generate individual classifiers, target characteristics are extracted form the acquired brain wave signals when in identity identification or authentication, and are input to corresponding individual classifiers, output results are uniformized to judge the results, and judged results appear in probability distribution way. The identification rate can exceed 90 percent by selecting a suitable threshold value. The brainprint identity identification authentication technology can change biological characteristics, the trainee only imagines a certain motion, the motion can be used as a password for storage, keys, passwords or other tools are not needed when in application, and by only remembering the passwords, the operation can be completed.

Systems and methods for fitting cochlear implants. The cochlear implant fitting systems and methods can be used to generate various stimulus patterns for fitting patients with speech processors for cochlear implants. The fitting systems and methods provide means to identify rapidly which of several speech processing strategies could function effectively in cochlear implant patients.

The invention relates to a three-dimensional light stimulus system comprising a laser, a neutral color filter, a polaroid sheet, a plane mirror, four lenses, a space light modulator, a computer, a dichroscope and an objective lens, the stimulus light transmitted by the laser is incident on the space light modulator through the neutral color filter, the polaroid sheet, the plane mirror and two lenses in order, the computer is connected with the space light modulator and controls the stimulus light generated incident by the space light modulator to generate a bit phase and to modulate into a stimulus light of diffraction pattern, the stimulus light is irradiated by the two lenses, the dichroscope and the objective lens to the nearby area of the sample to form the stimulus pattern of three-dimensional space distribution. The invention has advantages that, a plurality of stimulus points distributed in the three-dimensional space are formed simultaneously, and the position can be changed arbitrarily; the three-dimensional area of any shape can be stimulated. The invention can be applied to the research of the stimulus response, can combine with the biomedical observation system, can provide the means for the biology and medicine researches, and can be extensively used for the researches of chemical and physical and so on a plurality of academic subjects.

A method for adaptively determining a model of visual performance of a test subject comprising the step of exposing a test subject to a plurality of trials. Each trial comprises the steps of identifying the stimulus pattern to test, generating a stimulus pattern on a display, determining whether the stimulus pattern generated an OKR, updating the model to incorporate the OKR results, and determining whether the updated model is acceptable. The trials can be iteratively repeated until the model for visual performance is acceptable.

The invention discloses an emission microscope chip failure analyzing method. The method comprises the following steps of: developing chip test stimulus by utilizing a hardware description language; simulating the chip test stimulus by software, burning the chip test stimulus into an FPGA (Field Programmable Gate Array) substrate after the simulation becomes normal; outputting a plurality of stimulus pattern outputs to a plurality of pins of a chip to be analyzed by the FPGA substrate to ensure that the circuit of the chip to be analyzed enters a failure stimulus mode; and capturing a light-spot through the emission microscope, and performing circuit analysis and failure analysis on the light-spot. The invention also discloses an emission microscope chip failure analyzing system. By adopting the emission microscope chip failure analyzing method and system, multi-channel complex test vector application can be realized, a defect of the emission microscope chip can be positioned, the cost for chip failure analysis can be reduced, and the analyzing efficiency can be improved.

A tactile-based simulated visual hallucination positioning system in the field of visual prosthesis technology includes a helmet-mounted display, a head auxiliary positioning device, a touch screen, a computer, a tactile navigation device and a touch panel. First, the head-mounted display is used as the stimulus source to provide simulated visual hallucination stimulation, the user's head is fixed at a fixed position relative to the touch screen by the head auxiliary positioning device, and the simulated visual hallucination generating software with the appropriate stimulation mode is selected, and the simulated visual hallucination is generated by the computer , after the user judges the position of the simulated visual illusion in the head-mounted display, with the assistance of a tactile navigation device or a touch pad, the user indicates the location on the touch screen, and after the corresponding software processes the feedback data, the simulated visual illusion using tactile perception can be obtained Analysis and evaluation of positioning accuracy, dispersion and other information.

The invention belongs to the technical field of biomedicalengineering and information, in particular to a brainprint identity identification authentication method based on a multi-characteristics algorithm. By fully utilizing characteristic fusion, different brain wave signals are generated by training a trainee with different stimulus patterns; the brain wave signals generated by the stimulus are analyzed by using a multi-characteristic extraction method, the extracted individual characteristic signals generate individual classifiers, target characteristics are extracted form the acquired brain wave signals when in identity identification or authentication, and are input to corresponding individual classifiers, output results are uniformized to judge the results, and judged results appear in probability distribution way. The identification rate can exceed 90 percent by selecting a suitable threshold value. The brainprint identity identification authentication technology can change biological characteristics, the trainee only imagines a certain motion, the motion can be used as a password for storage, keys, passwords or other tools are not needed when in application, and by only remembering the passwords, the operation can be completed.

The invention relates to a device for stimulating neurons, comprising a stimulation unit, which can be implanted in the body of a patient and which has a plurality of stimulation elements for stimulating neurons in the brain and / or spinal cord of the patient with stimuli, and a control unit, which operates the stimulation unit during a first time interval and during a second time interval following the first time interval in different stimulation modes. The control unit controls the stimulation unit during at least 75% of the duration of the first time interval in a first stimulation mode suchthat the stimulation element repeatedly generate sequences of stimuli and the order in which the stimulation elements generate the stimuli within a sequence is constant for not more than 5 successively generated sequences and is then varied. The control unit controls the stimulation unit during at least 75% of the duration of the second time interval in a second stimulation mode such that the stimulation elements repeatedly generate sequences of stimuli and the order in which the stimulation elements generate the stimuli within a sequence is constant for at least 25 successively generated sequences and is then varied. The intensity of stimuli in the first stimulation mode is lower than or equal to a predetermined stimulus intensity and the intensity of stimuli in the second stimulation mode is at least 1.3 times the predetermined stimulus intensity.

A method for adaptively determining a model of visual performance of a test subject comprising the step of exposing a test subject to a plurality of trials. Each trial comprises the steps of identifying the stimulus pattern to test, generating a stimulus pattern on a display, determining whether the stimulus pattern generated an OKR, updating the model to incorporate the OKR results, and determining whether the updated model is acceptable. The trials can be iteratively repeated until the model for visual performance is acceptable.

Described is a system for cueing a specific memory in a waking state. The system sends an initiation signal to a memory recall controller to select a stored stimulation pattern previously associated with a specific memory of an event. The system signals to a memory recall controller to initiate delivery of the selected stimulation pattern to a brain in a waking state for a duration of the event via a brain stimulation system. Following completion of the event, the system signals for the memory recall controller to stop the brain stimulation system from delivering the selected stimulation pattern.

A device, system, and method for facilitating a sleep cycle in a subject during a pandemic or peri COVID vaccination period, comprising determining a current awake or sleep stage of a person; automatically defining a desired sleep cycle pattern, dependent on the current awake or sleep stage of the person; generating an audio or optical stimulation pattern by an automated processor; and entraining brainwaves of the brain of the person with the stimulation pattern corresponding to the desired sleep cycle pattern, to thereby induce a sleep cycle in the person according to the sleep cycle pattern. When sleep patterns are normalized, a SARS-Cov-2 vaccination may be administered to the person.