87results about How to "Susceptible to interference" patented technology

The invention relates to in an analysis method of the Facial Expression image classification and semantic evaluation on the basis of semantic evaluation and the quantization. This invention makes use of the sample collection of training Facial Expression images, extracting expression characteristics to form a marker map of LG Vector, projecting it to the Principal Component PCA subspace, making the use of these reduced-order LG Vectors to learn mixed multi-dimensional t-distribution, as the semantic judgment of six basic emotions of the images, in according to that which probability taken up by expression is maximal, that image is judged thereby to that expression. Which resolve the recognition difficulties of the uncertainties, automatic facial expression existed in the current technology, and the singularity difficult to overcome such defect. This invention is an extremely flexible and powerful modeling tools based on the statistics, provides a more robust ways, avoiding the extreme estimates of posterior probability of the subordinate component of sample observed, the training samples do not require labeling, do not require any post-processing, less sensitive to outliers, avoid this artificial Judgment.

The invention relates to a phase-locked loop circuit (1) in a radio transceiver for the detection of the linear operation of a first voltage controlled oscillator (2). The phase-locked loop circuit also has a frequency divider (8), a reference oscillator (10), a phase detector (12) to compare the phases of the reference oscillator (10) with a divided frequency of the frequency divider (8), and a charge pump (14) connected to the phase detector (12) and is characterized in that the connection (13) between the phase detector (12) and the charge pump (14) has at least one branch-off line (15) connected to at least one filter (22) having an output voltage that is related to the linear operation of the voltage controlled oscillator (2).

A probe for measuring oxygen, temperature, and pressure in a space to be monitored, comprising: a housing, comprising a thermally conductive material; an oxygen sensor disposed within the housing, comprising: a first end having coated thereon a coating which fluoresces at a fluorescent frequency when exposed to light having an excitation frequency in the absence of associated oxygen, and which undergoes a dampening of said fluorescence in the presence of associated oxygen; and a second end operatively connected to an optical fiber that extends through the housing; wherein the first end extends through the housing and is adapted to be exposed to the space to be monitored; a temperature sensor disposed within the housing adjacent to the thermally conductive material, comprising a fiber Bragg grating, or a semiconductor material, such as a GaAS material, wherein the temperature sensor does not extend through the housing and is not exposed to the space to be monitored; a pressure sensor disposed within the housing, comprising a fiber Bragg grating or a Fabry-Pérot white light interferometry sensor having a first end which extends through the housing and is adapted to be exposed to the space to be monitored.

The invention provides a non-invasive blood pressure detecting system and method based on finger artery waves. The detecting system comprises two photocapacitance pulse wave sensors, a filtering and amplifying circuit, a microprocessor master control circuit, a battery module, a mobile communication module and a cloud platform. The detecting method includes the steps that firstly, photocapacitance pulse wave signals of two points in front of and behind the same finger artery are acquired at the same time, after being filtered and amplified, the two paths of photocapacitance pulse wave signals are subjected to AD conversion, corresponding feature points are subjected to position marking, the waveform feature point time difference between the two paths of waves is calculated, pulse wave conduction time is obtained, and a linear equation is established according to the direct proportion relation between blood pressure and the pulse wave conduction time; finally, the obtained pulse wave conduction time and blood pressure data obtained through a sphygmomanometer are substituted into the linear equation, individual undetermined parameters are calibrated, new pulse wave conduction time is substituted into the linear equation obtained after the parameters are determined, and the blood pressure of a testee is obtained through calculation. The non-invasive blood pressure detecting system is light, small and ingenious in design, no traditional cuff is needed, and the testing result is precise.

The invention relates to a high-voltage transient electromagnetic pulse detector which comprises a probe (1), a receiving unit (3) and a connecting part, wherein the connecting part is used for connecting the probe (1) and the receiving unit (3) and is an optical fiber (6), and the probe (1) comprises an antenna (2), a cylindrical sealed shielding shell (5) and a signal processing unit (4) which is arranged in the shielding shell (5). The invention solves the technical problems that a traditional electric field tester is easily burnt by a strong electric field when working under a strong electric field, and the tested waveform distortion is more serious due to the interference of the strong electric field. The high-voltage transient electromagnetic pulse detector has the advantages that the anti-interference property is strong, circuit distortion can be prevented, and a signal processing circuit can also be prevented from being burnt by the strong electric field and the like.

The invention discloses a single-ended chaotic Brillouin dynamic strain measuring device and method based on Rayleigh scattering, aiming at meeting the current requirements of long-distance, high-resolution, large dynamic range and real-time and rapid application of distributed sensing and simultaneously solving the problem that a system cannot work when a breakpoint occurs because a pump light and a detection light need double-end incidence in a Brillouin optical coherence domain analysis system. A continuous light output by a light source is divided into two paths through a coupler, one pathis used as the pump light, the other path is subjected to double-sideband modulation through a high-speed electro-optic modulator, a backward Rayleigh scattering light is used as the detection lightand generates stimulated Brillouin scattering with the pump light, and a corresponding dynamic strain value is demodulated through a corresponding relation between intensity information acquired by ahigh-speed data acquisition system and strain. The single-ended chaotic Brillouin dynamic strain measuring device is simple in structure and low in cost, can effectively reduce signal power fluctuation, and realizes dynamic strain measurement with single end, high spatial resolution, long distance and good stability.

A method for validating data content in a wirelessly received communication signal, wherein the data content includes at least one position statement for a transmission module sending the communication signal, wherein the communication signal is received by a reception module having at least two antennas, wherein the communication signal is used to determine a direction from the reception module to the transmission module and wherein the determined direction is used to validate the position statement. The direction is determined from a phrase difference in the communication signal at the at least two antennas. The invention further relates to a corresponding communication apparatus and to a use for the communication apparatus.

The invention discloses application of a diketopyrrolopyrrole derivative. The diketopyrrolopyrrole derivative has a selective complexation effect on Hg<2+>, can easily realize decomplexation and is applicable as an Hg<2+> recognition substance to preparation of a fluorescent sensor used for detecting Hg<2+> in an aqueous solution. The prepared fluorescent sensor used for detecting Hg<2+> has the characteristics of recognizability with naked eyes, high sensitivity and repeated usability, has high Hg<2+> selectivity and is free of interference by cations like Ag<+>, Pb<2+>, Cu<2+>, Cr<3+>, Mn<2+>, Fe<3+>, Co<2+>, Ni<2+>, Zn<2+>, Cd<2+> and Al<3+> in detection of Hg<2+>. The fluorescent sensor is widely applicable to the fields of environmental engineering, biological detection, etc.

A device has at least one channel for detecting the phase boundary between media in a liquid container and has a probe which can be fed in the direction of the phase boundary and a circuit which processes a signal of the probe to detect a capacitance change. The device includes a testing module which executes an infeed movement of the probe. The testing module performs an analysis of the signal of the channel, and makes a connection statement about the electrical connection between the probe and the measuring circuit. The testing of the electrical connections is performed in a dry manner, i.e., a phase boundary does not have to be searched for or penetrated for the testing.

A sensor determines the absolute angular position of a body that can rotate through rotations. The sensor includes two code wheels which rotate as the body rotates. The code wheels are driven at a different gear ratio such that the code wheels rotate faster than the body and the code wheels rotate at different rates. Two sensor elements respectively determine the rotational angle positions of the code wheels. The difference between the rotational angle positions is a beat angle. The different gear ratio is selected such that beat angle periods are in an angular measuring range of the sensor and the absolute angular positions of the code wheels in the beat angle periods is different. The absolute angular positions of the code wheels in successive beat angle periods is offset by the nth part of the measuring range of a sensor element, where n is number of beat angle periods.

The invention provides a reflective optical path device of an online laser gas analyzer. The reflective optical path device comprises a laser transmitting and receiving unit, a background removing unit, an online monitoring unit and a laser reflecting unit which are sequentially connected with one another. The laser transmitting and receiving unit comprises a tunable laser device, a first wedge lens, a reference cell, a first detector, a second detector and a third detector, and the directions of principle optical axes of the reference cell and the first detector and the direction of laser light emitted by the tunable laser device are symmetrical with one another relative to the normal of a first surface of the first wedge lens; the background removing unit comprises a second wedge lens; the laser reflecting unit comprises a third wedge lens and an optical corner reflector. The reflective optical path device has the advantages that optical distances of measured gas can be doubled, and accordingly the sensitivity and the detection limit of the analyzer can be greatly improved; the reflective optical path device is easy and convenient to mount and debug; the gas can be measured in an online manner in real time; the reflective optical path device has few optical components and is simple in structure, and optical paths can be debugged and mounted by unprofessional people.

An apparatus for receiving data includes a data receiver for receiving the data, wherein the data is transmitted in a first channel by a first transmission. Moreover, the apparatus includes a transmit information transmitter for transmitting transmission information in a second channel by a second transmission. The transmission information is control information depending on the first transmission, or the transmission information is channel quality information indicating a channel quality of the first channel. The second channel is different from the first channel. Moreover, an apparatus for transmitting data and a system are provided.

The invention relates to the technical field of animal detection, and discloses a pig backfat thickness measurement method, which comprises the following steps: acquiring an RGB-D video of the hip of a pig, determining a key frame from each frame of image in the RGB-D video by a pre-trained Mask R-CNN model, and obtaining a segmented image with a pig target, wherein a feature extraction network of the Mask R-CNN model adopts a lightweight network MobilenetV3, using a depth separable convolution and inverse residual structure, and introducing a lightweight attention module; according to the physiological part and hip width of the pig, segmenting he segmented image with the pig target to obtain a key region image of the hip of the pig; subjecting the hip key area image of the pig to four-channel input to a trained deep learning model network for fat thickness prediction. The deep learning model network uses a resenet50 backbone network to be combined with an FPN structure, and backfat thickness value prediction is more accurate. In addition, the invention also provides a system for realizing the method.

The invention relates to a technology to eliminate interference clutters of a self-corrected supersonic thickness measuring system. Part of supersonic waves emitted by a traditional self-corrected supersonic thickness measuring system is not vertical in wave velocity, is reflected regularly by a cylindrical wall and lower surface of a correction block after entering the correction block, is finally received by a supersonic probe, and forms interference signals of very high amplitude. Threads whose pitch is lower than the wavelength of supersonic waves is processed on the correction block, thesupersonic waves entering the correction block in an inclined way are reflected in a diffuse way on the cylindrical wall, so that the amplitude of clutter signals received by the supersonic probe is reduced greatly, and the clutter signals can be distinguished from measured signals very easily.