5 results about "Sensitivity limit" patented technology

The invention belongs to the technical field of deep learning, and particularly discloses an ultra-precision full-field displacement measurement method and system based on a convolutional variational auto-encoder. Comprising the following steps: acquiring a video when a to-be-detected structure is subjected to vibration deformation, and selecting a picture of a deformation position to construct a data set; training a deep learning model of the convolutional variational auto-encoder based on the data set; reconstructing the gray value of the original image by using the trained deep learning model to obtain a gray value containing infinitesimal displacement information; and carrying out displacement calculation on the reconstructed image by utilizing an optical flow method, and realizing ultra-precision displacement calculation on the to-be-measured structure according to gray value conversion. According to the method, the problem that the infinitesimal displacement smaller than the sensitivity limit is difficult to measure is solved, the problem that the to-be-measured structure is blocked and cannot be measured is solved by utilizing the characteristics of the generative deep learning model, and the basic data precision of displacement measurement is remarkably improved.

The invention provides a single molecule sensing array module, a quantitative analysis chip and a quantitative analysis method, which can realize excitation and sensing of high-flux parallel single molecules, and the detection sensitivity limit can reach a single molecule level; a standard curve can be formed for optical signals of ultralow-concentration target molecules, the problem that the intensity of the optical signals is not uniform and not repeated is solved through a digital processing method, accurate quantitative analysis of the ultralow-concentration molecules can be achieved, the detection sensitivity is improved, and the sensitivity grade reaches the single-molecule grade. The method has great application value in the fields of clinical medicine, life science, food detection, environmental protection, national defense, public safety, basic research and the like. The method can also be applied to single-molecule immunodetection, and single-molecule immunodetection with ultralow detection limit is realized.

The present application relates to the field of radiation emission and sensitive limit optimization of multiple devices, and particularly relates to a radiation emission and sensitive limit joint optimization device for multiple radio frequency device coexistence. The device comprises: a coupling gain calculation module, which calculates the radiation coupling gain of a multiple device system composed of multiple transmitting devices and multiple receiving devices; an interference power and interference margin calculation module, which calculates the interference margin of a receiving device at a set frequency point according to the interference power; a target function construction module, which constructs a comprehensive target function; a constraint module, which sets a constraint condition and constructs an optimization problem; an optimization problem solving module, which iteratively solves the optimization problem using a sequential quadratic programming method; and a dynamic adjustment module, which dynamically adjusts the weights of each item in the comprehensive target function, and outputs the emission limit and sensitive limit of the multiple device system at all frequency points when the iteration stop condition is met. The present application is suitable for complex system electromagnetic compatibility design.

An instrument and method for analyzing a gas leak. The instrument can obtain a time series of spectra from a scene. The instrument can compare spectra from different times to determine a property of a gas cloud within the scene. The instrument can estimate the column density of the gas cloud at one or more locations within the scene. The instrument can estimate the total quantity of gas in the cloud. The instrument can estimate the amount of gas which has left the field of view of the instrument. The instrument can also estimate the amount of gas in the cloud which has dropped below the sensitivity limit of the instrument.

An instrument and method for analyzing a gas leak. The instrument can obtain a time series of spectra from a scene. The instrument can compare spectra from different times to determine a property of a gas cloud within the scene. The instrument can estimate the column density of the gas cloud at one or more locations within the scene. The instrument can estimate the total quantity of gas in the cloud. The instrument can estimate the amount of gas which has left the field of view of the instrument. The instrument can also estimate the amount of gas in the cloud which has dropped below the sensitivity limit of the instrument.