34results about How to "Effectively remove interference" patented technology

The invention discloses a determination method for bromo-dioxin in an environment sample, particularly relates to determination of the bromo-dioxin in coexistence of polybrominated diphenyl ethers and the bromo-dioxin, and belongs to the field of detection of the bromo-dioxin. The determination method comprises pre-treatment of the sample and instrument analysis. The pre-treatment of the sample comprises Soxhlet extraction-sulfuric acid treatment-purification by multilayered silica gel columns-purification by an active carbon silica gel column-nitrogen blowing concentration; and the determination is as follows: an isotope dilution-high resolution gas chromatography-high resolution mass spectrometry (HRGC-HRMS) is used for determining the test sample. The problems that the polybrominated diphenyl ethers and the bromo-dioxin are difficult to separate when the polybrominated diphenyl ethers and the bromo-dioxin coexist, and the bromo-dioxin is decomposed into the polybrominated diphenyl ethers in the instrument analysis process are solved, so that the method is a high-sensitivity and high-accuracy analysis method for determining the bromo-dioxin in the sample.

The invention belongs to the technical field of remote sensing and mapping, and specifically relates to a non-vegetation-covered area airborne LiDAR data echo intensity value correction method. The method includes following steps: performing primary correction of an echo intensity value based on the flying height and the laser point elevation value, and performing homogenization on the influences of the laser transmission distance on the echo intensity value; calculating the tendency angle values of laser points point by point by setting a threshold determination condition and taking the plane distance value, the elevation value and the echo intensity value as references based on LiDAR data after primary correction; and calculating the reflection angle with the combination of the tendency angle and an incidence angle, and performing correction calculation on the echo intensity value of the original LiDAR data again. According to the method, the technical problem of difficult realization of airborne LiDAR data echo intensity value correction of non-vegetation surface features, especially inclined surface features in the prior art is solved, the airborne LiDAR data echo intensity value can better reflect the surface feature media attributes, and the application values thereof in surface feature classification and identification are improved.

The invention discloses a high-voltage electroscope. The high-voltage electroscope comprises an electroscope body, the electroscope body is internally provided with a signal acquisition module, a signal processing module, a signal detection and analysis module and a power supply, wherein the signal acquisition module comprises a range finding apparatus and a UV sensor, and the UV sensor is provided with a capacitor, a driving circuit, a rectifier and a filtering instrument; the signal processing module comprises a digital and signal processing apparatus and a signal transmitter, and the digital and signal processing apparatus is provided with a signal converter, a memory, an alarm apparatus, a display apparatus and a humiture gatherer; and the signal detection and analysis module comprises an online detection apparatus and a remote transmission apparatus; and the electroscope body is provided with a switch button, an installation port and an operation handle. The high-voltage electroscope has the following advantage: the UV sensor can convert UV signals into measurable electric signals, can detect a circuit over a long distance, is free from contact with a high-voltage cable or live-line equipment, and is accurate in live part verification result.

The invention belongs to the field of analysis and detection, and relates to a method for extracting and detecting frisee polyphenols (levan). An inventor adopts a GracePure<TM> SPE C18-Max column produced by GRACE Company to filter a sample in the extraction of frisee plant samples. The column can remove the polar matters from a water solution, nearly cannot absorb sugar, and can effectively reduce the detection background. A common HPLC (high performance liquid chromatography) instrument is adopted, but a PREVAIL Carbohydrate ES special sugar column produced by the GRACE Company is adopted and has good sugar separation function. The sugar column is an amino sugar column bonded by polystyrene and divinylbenzene, so the problem of disturbing other amino columns is avoided, the chemical degradation is avoided, and the stability is realized at room temperature and under the gradient elution condition; an ELSD (evaporative light-scattering detector) is used for the sugar detection, and one complete set of extraction and detection flow of the polyphenols (levan) of the frisee plant samples is firstly established.

A shared frequency transmitter for use in a network environment where transmitters and receivers of plural radio communication systems in which the same frequency is used exist is disclosed. The shared frequency transmitter includes (a) a communicating unit configured to detect peripheral transmitters existing in a peripheral area, and to exchange information with the detected peripheral transmitters; and (b) a signal generating unit configured to generate a transmit signal by applying an interference cancellation technique based on the information obtained through the exchange of information.

The invention relates to a pipeline video data restoration method based on computer vision. The method comprises the following steps: carrying out gray stretching on a pipeline image and video collected by a pipeline robot; processing noise interference by using smooth filtering; extracting an iron cable in the center of the video image as a template to realize positioning; performing target identification on the video data center by using an SIFT corner detection algorithm; detecting the cables on the left and right sides of the target by using Hough transform; gray coverage being carried out on the iron cable in the center of the video image and the cables on the two sides; and repairing the data by using an FMM image repairing algorithm. The method can effectively restore the video data collected in the pipeline, reduce the processing difficulty of later pipeline data, improve the processing speed and recognition efficiency of later disease images, and is suitable for the field of urban pipeline and industrial pipeline maintenance.

The invention discloses an upstream noise inhibiting method automatically adapting to noise thresholds in an LTE-distributed relay system. The method comprises the steps of adding a base noise inhibiting module in a baseband digital signal processing unit of a remote unit in the direction of an uplink, getting a sub-band digital signal of each resource block after received an LTE upstream digital baseband signal passes an analysis filter bank, calculating power values of each digital signal in each resource block and a power value of current base noise, and getting an opening threshold and a closing threshold of noise after an automatically adapted noise threshold updates current noise threshold value. Then, calculated digital signal power in each resource block is compared with the noise thresholds in a judgment unit, after which, sub-band signals with low power are set to zero according to a corresponding comparison and judgment method to inhibit the base noise. After noise is inhibited, each sub-band signal in each resource block gets a restructured LTE digital baseline signal through a synthesis filter bank.

The invention discloses an image acquisition external trigger signal debounce device, relates to industrial control technology, and proposes the invention in order to reduce the obstacles to the use of image splicing equipment caused by jitter. The technical solution adopted in the present invention includes: the first input noise suppression circuit and the second input noise suppression circuit are connected to the input phase detection circuit, and the input phase detection circuit, the input pulse calculation circuit and the image acquisition trigger circuit are sequentially connected.

The invention relates to the technical field of detection reagents, in particular to a heparin-resistant and stable α-L-fucosidase detection kit and its application. The kit of the present invention comprises streptomycin sulfate 0.03~0.1g / L, buffer 50~500mmol / L, substrate 0.1~3g / L, surfactant 1~50g / L, stabilizer 0.001~0.1g / L L and preservative 0.3~3g / L; The substrate includes 2-chloro-p-nitrophenol-α-L-fucoside or M-G-2-chloro-p-nitrophenol-α-L-rock Alcosides. The present invention effectively removes the interference of heparin in the sample by adding streptomycin sulfate at an appropriate concentration to the α-L-fucosidase detection reagent, and solves the problem that the AFU single reagent is not resistant to heparin.

The invention discloses a method and system for detecting fabric of a sewing machine. The method comprises: when an infrared emitting diode opposite to an infrared photosensitive diode in an infrared light receiving circuit is activated, receiving a first sampling signal sent by an infrared light receiving circuit; When the infrared emitting diode is turned off, the second sampling signal sent by the infrared light receiving circuit is received; the first infrared light energy corresponding to the first sampling signal and the second infrared light energy corresponding to the second sampling signal are generated, and the first infrared light energy is calculated The difference between the energy and the second infrared light energy; according to the comparison between the difference and the preset infrared light energy, it is determined whether there is cloth at the corresponding position of the infrared photosensitive diode; the present invention can effectively remove the interference of infrared light in the environment on the detection of cloth, It also reduces the time for fabric detection, which is beneficial to control the length of the braid when the sewing machine trims the thread; and through the setting of the infrared photosensitive diode, it can sense the light intensity more accurately and improve the accuracy of fabric detection.