39results about How to "Reduce detection bias" patented technology

A display apparatus provides an improved control accuracy of the brightness and the chromaticity. The liquid crystal display apparatus has a liquid crystal panel and a backlight unit for applying diffused light to the liquid crystal panel in a form of a sheet. The backlight unit has a light source, a light guide plate for converting light emitted from the light source into a sheetlike beam of light, an optical sheet for converting light emitted from the light guide plate into condensed light or diffused light, and an optical sensor unit for detecting a portion of light from the light guide plate and converting the detected light into an electric signal. The backlight unit also has a case housing the light source, the light guide plate, the optical sheet, and the optical sensor unit. The optical sensor unit is fixed to an area that is inside of the light guide plate and exerts no influence on display.

The invention provides a method for hydrophobicity detection and aging evaluation of a composite insulator based on the ultraviolet optical characteristics of liquid drop electric discharge. According to the method, on the premise that safe operation of electric transmission and transformation equipment is guaranteed, the ultraviolet optical characteristics of liquid drop electric discharge on the surface of the composite insulator are effectively obtained and are used for reflecting the existing state and the distribution of the surface liquid drop of the composite insulator and the aging condition of the composite insulator, a corresponding aging evaluation basis is provided, hydrophobicity lowering factors causing an external insulation flashover accident can be detected and judged early, the definition and the accuracy of the surface hydrophobicity detection of the composite insulator are improved, and the continuity and the reliability of power supply and distribution of a power system are effectively guaranteed.

The invention relates to a detection method, in particular relating to an online detection method for the width of a fabric. The detection method provided by the invention is characterized in that one surface of the fabric to be detected is provided with a group of light emitting tubes, and the other surface of the fabric to be detected is provided with a group of photosensitive elements or the same surface of the fabric to be detected is provided with a group of light emitting tubes and a group of photosensitive elements; the total width of the group of photosensitive elements is larger than the width of the fabric to be detected, and the central distance of the adjacent photosensitive elements is known; the photosensitive elements which are positioned in the width region of the fabric to be detected are shielded or reflected through the fabric to be detected; the shielded or reflected photosensitive elements send received signals to a front end circuit to be processed, and the received signals are different from the signals of the light emitting tubes which are not shielded or reflected; the signals are computed and processed through a central processing unit, thereby obtaining the data of the total number B of the photosensitive elements which are shielded or reflected by the fabric to be detected; and the program operation is carried out to obtain the data of the width L of the fabric to be detected. The method provided by the invention has the following advantages: (1) rapid and accurate detection, and suitability for industrial application; and (2) wide detection range.

The invention discloses a self-adaption dynamic detection circuit for a switch power source. The self-adaption dynamic detection circuit is used for generating a self-adaption dynamic voltage VREF which dynamically changes along with loads. The self-adaption dynamic detection circuit for the switch power source comprises a switching period to current conversion circuit, a low pass filtering circuit and a VREF generation circuit. The switching period to current conversion circuit controls timing of an OSC in a switch power source control chip, and therefore different control signals can be generated, the control signals are used for switching on different current branches in the switching period to current conversion circuit, corresponding voltages that change slowly are obtained when branch voltages that are generated are filtered by the low pass filtering circuit, and the self-adaption dynamic voltage VREF is output when the voltages pass through the VREF generation circuit. The self-adaption dynamic detection circuit is advantaged by good dynamic characteristics and small output voltage overshoot; a technical problem that large dynamic detection deviation is caused due to the fact that conventionally the VREF voltage (reference voltage) cannot change along dynamically along with load conditions and therefore voltage difference values detected at different loads are inconsistent can be solved.

The invention discloses a reagent kit and a method for accurately and quantitatively detecting type-II norovirus, and particularly relates to a group of primers and probes for detecting type-II norovirus, a reagent kit with the primers and the probes and a method implemented by the aid of the reagent kit. The primers and the probes are provided with nucleotide sequences shown from SEQ ID No.1 to SEQ ID No.3 in a sequence table. The reagent kit and the method have the advantages that the method can be used for accurately and quantitatively detecting the type-II norovirus by the aid of microdroplet digital PCR (polymerase chain reaction) technologies and is high in sensitivity, accuracy and repeatability and easy to standardize.

There is provided an optical disc recording / reproducing apparatus which can reduce the chip size using the high-miniaturization process and can enhance the detection accuracy. A signal which is obtained by amplitude-adjusting a header region in a reproduced signal detected by an optical pickup (1) is digitized, and peak detection or bottom detection from the reproduced signal in each of a first section and a second section in the header region is performed by detection circuits (9) to (12), respectively. Then, amplitude data in the first section and the second section are obtained by subtracters (13) and (14) from the detected values in the respective detection circuits. A difference in amplitude between the first section and the second section in the header region is obtained by a subtracter (15) based on the amplitude data, and the amplitude difference is outputted as an off-track error signal. The respective detection circuits (9) to (12) perform detection operations in the first and second sections, and hold the detection operations in the sections other than the first and second sections.

The invention belongs to the field of detection of virus nucleic acid, and particularly relates to a digital PCR reagent kit and detection method for quantitative detection of EB virus nucleic acid. The reagent kit contains digital PCR reaction liquid and a quality control product, wherein the digital PCR reaction liquid contains a primer and probe for detecting EB virus nucleic acid, and comprises a forward primer as shown in SEQID NO:1, a reverse primer as shown in SEQID NO:2 and a probe as shown in SEQID NO:3. Fluorophore is marked at two ends of the probe. The reagent kit and the detectionmethod can realize absolute quantitation of nucleic acid molecules, so as to avoid deviation caused by PCR amplification efficiency variance, and the reagent kit and the detection method have high accuracy, sensitivity and repeatability, and easily realize standardization.

There is provided an optical disc recording / reproducing apparatus which can reduce the chip size using the high-miniaturization process and can enhance the detection accuracy. A signal which is obtained by amplitude-adjusting a header region in a reproduced signal detected by an optical pickup (1) is digitized, and peak detection or bottom detection from the reproduced signal in each of a first section and a second section in the header region is performed by detection circuits (9) to (12), respectively. Then, amplitude data in the first section and the second section are obtained by subtracters (13) and (14) from the detected values in the respective detection circuits. A difference in amplitude between the first section and the second section in the header region is obtained by a subtracter (15) based on the amplitude data, and the amplitude difference is outputted as an off-track error signal. The respective detection circuits (9) to (12) perform detection operations in the first and second sections, and hold the detection operations in the sections other than the first and second sections.

The present invention provides a production method for a gas sensor element (10) that can detect the concentration of a specific ion on the basis of a limiting current that is the current that flows between a first electrode (13) and a second electrode (14) in accordance with the concentration difference of the specific ion. The production method comprises a temperature raising step (S102), current measurement steps (S103, S107, S109, S111), and adjustment steps (S106, S108, S110). In the temperature raising step, a heater (15) is energized, and the temperature of a solid electrolyte layer (12) is raised. In the current measurement steps, voltage is applied to the first electrode (13) and the second electrode (14), and the limiting current is measured. In the adjustment steps, an ultrashort pulse laser is used to remove a diffusion resistance layer, and a diffusion distance that is the length of an introduction passage is thereby adjusted such that the limiting current is within a final standard range.

The invention provides a refrigerant leakage detecting method and system and an air conditioner. The method includes the steps that the first indoor air inlet temperature of an inlet of an indoor heat exchanger of the air conditioner and the first indoor heat exchanger temperature of the indoor heat exchanger are detected after a compressor of the air conditioner runs for a first set period of time; when the first difference between the first indoor air inlet temperature and the first indoor heat exchanger temperature is smaller than or equal to a first preset threshold, the second indoor air inlet temperature of the inlet of the indoor heat exchanger and the second indoor heat exchanger temperature of the indoor heat exchanger are detected after the compressor runs for a second preset period of time; when the second difference between the second indoor air inlet temperature and the second indoor heat exchanger temperature is smaller than or equal to the first preset threshold, whether variation of the second difference relative to the first difference is smaller than or equal to a second preset threshold or not is judged, and if yes, refrigerant leakage is judged to happen to the air conditioner. According to the technical scheme, refrigerant leakage of the air conditioner can be accurately detected in time.

The invention provides a power supply device. Detection of an AC input power is executed via a control chip in the power supply device without additionally arranging an external independent detection circuit so that design cost can be reduced and extra standby loss cannot be generated. Besides, with a mode that detection of the AC input power is executed by adopting the control chip, detection deviation can be effectively reduced so that a load system can be notified within permitted and accurate time, i.e. preset time. Furthermore, generation of indicating signals can be determined and adjusted by the control chip due to application requirements of the load system so as to notify the length of the preset time of the load system, and thus the power supply device can be generally applied to different types of load systems with timing control requirements.

The present invention relates to a pressure connected state detection circuit of induction type heating cooker. Said device is formed from Hall integrated circuit, Hall integrated circuit input power supply control portion, pressure connected state detection portion and microcomputer. The Hall integrated circuit after which is switched on can be worked to detect the pressure movement of cooke cover, and the Hall integrated circuit input powder supply control portion can be used for controlling switching-on and switching-off of the supply power source of Hall integrated circuit, and the pressure connected state detection portion can be used for controlling output voltage according to the power supply of Hall integrated circuit, and the microcomputer is used for controlling Hall integrated circuit input power supply control portion and can be used to judge the Hall integrated circuit is normally worked or not.

The invention belongs to the technical field of nano biological materials, and discloses an intracellular detection method based on a double-excitation ratio type up-conversion fluorescence probe. Themethod comprises the steps of carrying out contact reaction on a nanoprobe and a to-be-detected target object in cells, and detecting the concentration of the to-be-detected target object by monitoring the luminous intensity of the nanoprobe by adopting double exciting light, wherein the nanoprobe is dye-sensitized rare earth doped up-conversion nanoparticles, and the target object to be detectedis selected from intracellular active oxygen and active nitrogen related to many physiology and pathology, or intracellular metal ions. According to the method, the energy transfer process of the up-conversion nanoparticles is efficiently sensitized by using the dye, so that the detection sensitivity is improved; a double-excitation ratio probe model is provided as a setting reference, so that the detection deviation caused by an intracellular complex environment, probe distribution and instruments and equipment is reduced; a design scheme of a near-infrared double-excitation confocal microscope system is provided, and a new thought is provided for detecting substances in cells.

The invention provides a method for hydrophobicity detection and aging evaluation of a composite insulator based on the ultraviolet optical characteristics of liquid drop electric discharge. According to the method, on the premise that safe operation of electric transmission and transformation equipment is guaranteed, the ultraviolet optical characteristics of liquid drop electric discharge on the surface of the composite insulator are effectively obtained and are used for reflecting the existing state and the distribution of the surface liquid drop of the composite insulator and the aging condition of the composite insulator, a corresponding aging evaluation basis is provided, hydrophobicity lowering factors causing an external insulation flashover accident can be detected and judged early, the definition and the accuracy of the surface hydrophobicity detection of the composite insulator are improved, and the continuity and the reliability of power supply and distribution of a power system are effectively guaranteed.

The invention discloses a kit and a detection method for accurately and quantitatively detecting astrovirus and particularly relates to a group of primers and probes for detecting the astrovirus as well as the kit containing the primers and the probes and a detection method of the astrovirus, wherein the primers and the probes have nucleotide sequences shown in SEQ ID No. 1 to SEQ ID No. 3 in a sequence table. The invention provides the detection method for accurately and quantitatively detecting the astrovirus by using a droplet digital PCR (Polymerase Chain Reaction) technology; the method does not need to rely on certified reference materials or other standard substances, and has higher accuracy, sensitivity and repeatability, and is easy to standardize.

The invention discloses a reagent kit and a method for accurately and quantitatively detecting type-II norovirus, and particularly relates to a group of primers and probes for detecting type-II norovirus, a reagent kit with the primers and the probes and a method implemented by the aid of the reagent kit. The primers and the probes are provided with nucleotide sequences shown from SEQ ID No.1 to SEQ ID No.3 in a sequence table. The reagent kit and the method have the advantages that the method can be used for accurately and quantitatively detecting the type-II norovirus by the aid of microdroplet digital PCR (polymerase chain reaction) technologies and is high in sensitivity, accuracy and repeatability and easy to standardize.

The invention relates to a detection platform for artificial intelligence with installation and fixation, including a main body and a bracket. The top left and right sides of the main body are connected with fixed posts, and the main body and the fixed post are fixedly connected. The top of the fixed post A bolt cap is installed, and the inner inner wall of the top of the fixed column is closely attached to the inner inner wall of the bolt cap. The middle part of the top of the main body is provided with a secondary detection plate, and the center line between the main body and the secondary detection plate intersects. The beneficial effect of the present invention is: through the movement of the guide rod between the bracket and the rotating column, the guide rod can be rotated and fixed on the right side of the secondary detection board, and the secondary detection board can be fixed on the main body, so that the The first-level detection board is snapped on the second-level detection board, and it can classify and detect artificial intelligence products, so that it can perform fixed detection on the second-level detection board and the first-level detection board, and can classify and fix artificial intelligence products .

The invention discloses a laser target recognition system and method based on modulation. The system includes: a base station, which is used to use two laser emitters arranged on the base station to respectively emit laser beams of different wavelengths, and use The optical modulator modulates the laser beam and synthesizes it into a mixed light containing two wave bands with a modulation waveform amplitude difference of 180°, which is directed to the target to be identified, and the laser receiver is used to receive the mixed light that has been filtered and reflected by the target to be identified. Targets to be identified; one or more targets to be identified, used to filter the mixed light emitted by the base station, partially filter or completely cut off one of the wavelengths of light waves, and deflect the filtered light by several angles through the optical splitting device Then reflect back to the base station.

The invention discloses a kit for accurately and quantitatively detecting a transgenic maize line T25 and a detection method thereof. The invention in particular relates to a group of primers and probes which are used for detecting the transgenic maize line T25 as well as a kit containing the primers and probes, wherein the primers and probes have nucleotide sequences shown in SEQ ID No.1 to SEQ ID No.6 in a sequence table. The invention also provides a detection method for accurately and quantitatively detecting the transgenic maize line T25 by utilizing a dual microdroplet type digital PCR technology. The detection method provided by the invention is independent of a certified reference material or other standard substances, has higher accuracy, sensitivity and repeatability and is easy to be standardized.