36results about How to "Difficult to detect" patented technology

In image-checking equipment, a detector reads a line-shaped check image formed on a sheet and acquires image data on the check image. A controller calculates an edge blur in a rising edge and a falling edge of the image data, calculates a line width of the check image. The controller refers to a correction table with the measured values of the edge blur and the line width of the check image, and acquires a corrected line width value based on the correction table to obtain the real line width of the check image.

An apparatus and method for verifying capture by a selected pacing electrode in a multi-site pacemaker. A switching circuit switches the input of an evoked response sensing channel to an unselected electrode. A pacing pulse is then output by the selected electrode, and the presence or absence of capture is determined from the output of the evoked response sensing channel. In one embodiment, a backup pacing pulse is output by an unselected electrode if a loss of capture is detected.

The invention described herein represents a significant improvement for the concealment of objects and people. Thousands of light receiving segmented pixels and sending segmented pixels are affixed to the surface of the object to be concealed. Each receiving segmented pixel receives colored light from the background of the object. Each receiving segmented pixel has a lens such that the light incident upon it is segmented to form focal points along a focal curve (or plane) according to the light's incident trajectory. In a first embodiment, this incident light is channeled by fiber optics to the side of the object which is opposite to each respective incident light segment. The light which was incident on a first side of the object traveling at a series of respective trajectories is thus redirected and exits on at least one second side of the object according to its original incident trajectory. In this manor, incident light is redirected as exiting light that mimics the incident light's trajectory, wavelength, color, and intensity such that an observer can “see through” the object to the object's background. In a second embodiment, this incident light is segmented according to trajectory, and detected electronically by photo diodes. It is then electronically reproduced on at least one second side of the object by arrayed LEDs. In this manor, incident light is reproduced as exiting light which mimics trajectory, wavelength, color, and intensity such that an observer can “see through” the object to the background. In both embodiments, this process is repeated many times, in segmented pixel arrays, such that an observer looking at the object from any perspective actually “sees the background” of the object corresponding to the observer's perspective. The object having thus been rendered “invisible” to the observer.

The invention discloses a method and primer for detecting gene mutation relevant to the hereditary blood coagulation factor XI(F11). The primer comprises 15 pairs of primers with amplification detecting all-exon sequences. The Sanger sequencing technology and the sequencing primers are adopted. Hereditary blood coagulation factor XI(F11) deficiency disease all-exon and relevant mutation can be fast detected. The detecting result completed through the method and primer is accurate, diagnosis of the hereditary blood coagulation factor XI(F11) deficiency disease can be assisted, and the method and primer have important reference significance on early intervention, early treatment and antenatal diagnosis.

The invention relates to a road intersection detection method and device based on improved YOLOv3. The method mainly comprises the following steps: firstly, acquiring a road image; then, performing network training, and constructing an improved YOLOv3 network model; wherein the improved YOLOv3 network model comprises a feature extraction end and a feature detection end, the feature detection end comprises a plurality of channels, and in each channel, transversely broadening a corresponding convolution module to generate different feature maps, and then performing longitudinal aggregation; andadopting the improved YOLOv3 network model to identify a road image to be detected, and outputting a result. According to the invention, the convolution module in each channel of the improved YOLOv3 feature detection terminal is broadened transversely. different feature maps are generated according to the feature map set, and then longitudinal aggregation is carried out, so that the network widthof the convolution module of each channel can be wider, the expression capability of the network is enhanced, the detection difficulty of small-size road intersections in a complex remote sensing scene is reduced, and the detection precision is improved.

System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, convert the DC input voltage to an AC output voltage, and send the AC output voltage to a cold-cathode fluorescent lamp. If the DC input voltage is lower than a predetermined threshold, the system for driving the cold-cathode fluorescent lamp is turned off in response to the one or more control signals.

The invention discloses a primer for detecting ATRX (X-linked alpha thalassemia mental retardation syndrome) base mutation. The primer is characterized by comprising an ATRX gene No. 7 intron mutationregion; with adoption of a Sanger sequencing technique, the primer can be used for detecting a mutation site rapidly. A detection result completed by adopting the primer is accurate, so that the mutation of a hot spot region can be diagnosed in an auxiliary manner, and the result can also serve as a standard for judging the affection of the mutation site on a relevant disease. The inactive mutation of an ATRX gene can cause absent expression of an ARTX protein, causing unstable telomeres and endless division of cells. Therefore, the detection for ATRX gene mutation is an urgent task for identification and treatment of diseases.

In signal processing of the present disclosure, an abnormal correction value as a correction value for correcting a quadrature error that occurs in quadrature modulation is output in malfunction determining processing, and a normal correction value as the correction value is output in calibration processing. The presence or absence of malfunction in the signal processing is determined on the basis of the levels of carrier leak and image leak of the quadrature modulated signal.

The invention relates to a method for detecting poloxamer residual quantity in a recombinant human urokinase raw material for injection. The method comprises the following steps: (1) a sample solutionpreparation method: adding overnight frozen acetonitrile into a raw material sample, oscillating and ultrasonically treating for 2-4 minutes, oscillating for 20-40 seconds, centrifuging at 8000-9800rpm for 1-3 minutes, and taking a supernatant, wherein the ratio of the volume of the original sample to the volume of the acetonitrile is within 1-3; 2) preparing a standard substance solution: taking, weighing and preparing a poloxamer standard substance into standard substance solutions, wherein the concentrations of the standard substance solutions are 2 mg / ml, 1 mg / ml, 0.5 mg / ml, 0.25 mg / ml, 0.1 mg / ml, 0.04 mg / ml, 0.02 mg / ml, 0.01 mg / ml and 0.005 mg / ml in sequence; and 3) detection: respectively taking a standard solution and a sample solution, performing injecting into a high performanceliquid chromatograph, recording a chromatogram detected by CAD, drawing a standard curve by taking the concentration of the standard substance solution as an abscissa and the peak area as an ordinate,calculating the content of poloxamer in the sample solution by using an external standard method, and converting to obtain the content of poloxamer in the recombinant human urokinase raw material forinjection.

The invention discloses a kit and method for detecting STAT3 gene mutation of high IgE (Immunoglobulin E) syndrome. The kit comprises (i) a blood DNA (Deoxyribonucleic Acid) extraction reagent; (ii) PCR (Polymerase Chain Reaction) amplification reaction liquid for detecting a system; (iii) a reagent for sequencing the system; wherein primers comprise amplification primers and sequencing primers for amplifying whole exon sequences of STAT3 genes. In addition, a Sanger sequencing technology is used. According to the method disclosed by the invention, the mutation of whole exons of the STAT3 genes in the body of a patient with the high IgE syndrome can be quickly detected out. The detecting results obtained by through the invention can be used for assisting in diagnosis of the high IgE syndrome, which has an important reference significance for early intervention and early treatment.

The invention discloses a primer and method for detecting two base mutations of FGD1 659+27T>C and 482-113C>T; a Sanger sequencing technology is adopted and can be used for rapidly detecting the mutation sites. The results of detection completed by means of the primer and the method are accurate, and gene mutation of patients suffering from Aarskog syndrome can be assisted to be diagnosed. By means of the primer and method, whether or not generated gene mutation causes the Aarskog syndrome is judged and analyzed conveniently, and important reference significance is achieved for clinical differentiation and diagnosis on the Aarskog syndrome.

The invention discloses primers for detecting c.55C>G and c.238C>T base mutation of an ATP8B1 gene. The primers comprise primers for amplifying c.55C>G and c.238C>T sites of the ATP8B1 gene. By adopting a Sanger sequencing technology, the primers can be used for rapidly detecting c.55C>G and c.238C>T site mutation of the ATP8B1 gene in the body of a patient with progressive familial intrahepatic cholestasis type 1. The detection result completed by using the primers is accurate, and the primers have important reference significance for clinical differential diagnosis of the patient with progressive familial intrahepatic cholestasis type 1.

The invention discloses primers and method for detecting the mutation of loci where 3821C is larger than T, 3839G is larger than A, 3841G is larger than A and 3895C is larger than T in the region of aJAK3 gene intron 2. The primers include (i) the primers for amplifying the sequence of the JAK3 gene intron 2, and the Sanger sequencing technology and the sequencing primers are adopted. By means ofthe Sanger sequencing technology, the mutant loci can be rapidly found. The method is accurate in detection result and can assist in detecting the mutation conditions of the region. The mutation of the loci where 3821C is larger than T, 3839G is larger than A, 3841G is larger than A and 3895C is larger than T in the region of the JAK3 gene intron 2 can be rapidly detected. The method is accuratein detection result and has reference significance in exploring pathogenesis of diseases.

The invention belongs to the technical field of vehicle-mounted communication, and discloses a spectrum sensing data tampering attack method, and a distributed cognitive vehicle-mounted network. The method comprises the following steps: an attacker monitors a common control channel, the attacker determines an initial moving speed, the attacker performs cooperative spectrum perception, and the attacker adjusts an own movement speed. According to the spectrum sensing data tampering attack method, according to the distribution condition of neighbor nodes of the attacker, the change rates of the neighbor nodes of the attacker and the current movement speed of the attacker, the movement speed of the attacker is dynamically adjusted to realize the quick change of the neighbor nodes, when the attacker detection difficulty is increased, the proliferation of erroneous sensing data across the entire network is accelerated, so that the spectrum sensing data are tampered more effectively, and theattack is more flexible.

The invention discloses a method and primers for detecting the mutation of a dyskeratosis congenita (DC)-related gene WRAP 53. The primers comprise 13 pairs of primers for amplifying an all-exon sequence of the gene WRAP 53, and a sequencing primer. The method can rapidly detect the all-exon of the gene WRAP 53 and the relevant mutation by adopting a Sanger sequencing technique. After the method and the primers are used, the detection result is accurate; the method and the primers have important reference significance for realizing the early diagnosis of the DC, reducing misdiagnosis and missed diagnosis and carrying out treatment on the DC.

Primers and a method for detecting all exons of an interleukin-7 receptor (IL7R) gene related to T-cell acute lymphoblastic leukemia (T-ALL) are disclosed. The primers include eight pairs of primers for application detection of all exon sequences. A Sanger sequencing technique and sequencing primers are adopted. The disclosed primers and the method can rapidly detect all exon sequences and relatedmutants of the IL7R gene. A detection result obtained by utilizing the primers and the method is accurate, can provide a basis for T-ALL treatment, and is of great significance for selection of individual treatment schemes.

The invention discloses primers, kit and method for detecting the 12902T>C mutation in an intron 4 region of a phytosterolemia-related gene ABCG8. Through a Sanger sequencing technology, a mutation site in this region can be quickly found. The discovery of the mutation site facilitates the determination and analysis whether the ABCG8 gene mutation causes phytosterolemia and helps to identify the cause of the disease.

The invention discloses primers and a method for detecting mutation of GNAS basic group. The primers comprise hotspot mutation regions of No.5 exons of a GNAS gene; a Sanger sequencing technique is adopted to detect mutation locus quickly. A detection result obtained by the invention is accurate and can assist in diagnosing mutation conditions in the hotspot regions. By utilizing the primers and the method disclosed by the invention, the mutation of the No.5 exons 12384GCC greater than GCT and 12450ATC greater than ATT of the GNAS gene are found for the first time; the discovery of the mutation loci favorably judges and analyzes whether the generated gene mutation can cause related disease or not and assists in screening the cause of diseases.

A method for rapidly calculating gas concentration of distillation column comprises the following steps: firstly, obtaining the pressure and temperature of a rectification section and a stripping section; obtaining the gas concentration corresponding to the pressure and temperature by means of look-up or measurement; constructing a multivariate regression model of the pressure and temperature withrespect to the gas concentration; calculating an estimated value of the regression parameter by using least square method; and substituting the estimated value of the regression parameters into a multivariate regression model, so as to obtain a calculation formula of the gas concentration.

The invention belongs to the field of biochemistry, in particular to the field of measurement or detection related to biochemistry. More particularly, the invention relates to a method for preparing aFISH probe of an EGFR gene, and a probe prepared by the method. The method of the invention uses BAC cloning, enzyme digestion interruption and asymmetric amplification to prepare a probe library, thereby effectively improving product sensitivity, specificity and signal strength.

The present invention relates to the field of analytical chemistry, in particular to a method for detecting residual 4-dimethylaminopyridine on equipment. The method is high-performance liquid chromatography, comprising the following steps: sampling, blank solution, test solution and contrast Product solution preparation, detection.

The invention belongs to the field of biochemistry, in particular to the field of measurement or detection related to biochemistry. More particularly, the invention relates to a method for preparing aFISH probe of an EGFR gene, and a probe prepared by the method. The method of the invention uses BAC cloning, enzyme digestion interruption and asymmetric amplification to prepare a probe library, thereby effectively improving product sensitivity, specificity and signal strength.

The invention relates to a method for determining asarinin in blood-nourishing and brain-refreshing water extract. The method comprises the following steps: 1) preparation of a reference substance solution: weighing a proper amount of asarinin reference substance, and adding methanol to dissolve to obtain the asarinin-containing reference substance solution; 2) preparation of a test solution: taking the blood nourishing and brain refreshing water extract, adding 40-60% (v / v) of methanol, ultrasonically dissolving, passing through a solid phase extraction column, washing with 50-60% of methanol, discarding, eluting with a pure methanol solution, collecting eluent, and adding methanol to a scale to obtain the test solution; and 3) detection: respectively taking the reference solution and thetest solution, injecting the reference solution and the test solution into an ultra-high performance liquid chromatograph, recording a chromatogram, calculating the asarinin content of the test solution by using an external standard method according to the peak area, and converting to obtain the asarinin content in the blood nourishing and brain refreshing aqueous extract.

The invention relates to primers and a method for detecting TREX1 gene mutation. The primers comprise primers for amplifying whole exon sequences of a TREX1 gene, and a Sanger sequencing technology and sequencing primers are adopted. According to the invention, the mutation of the whole exons of the TREX1 gene can be rapidly detected. The detection result obtained by the invention is accurate, theAicardi-Goutieres syndrome can be diagnosed in an auxiliary manner, and the primers and the method have important reference significance for diagnosis and prognosis of diseases.

The invention relates to the field of analytical chemistry, in particular to a method for detecting the residual 4-dimethylaminopyridine on a device. The method is a high performance liquid chromatography and comprises the following steps of sampling, preparing a blank solution, a test solution and a reference solution, and detecting.

The invention provides a deceptive interference method and system for a gun sound positioning device and terminal equipment, which is suitable for use in the field of electronic countermeasure technology. The method includes: collecting an environment noise in real time, and converting the environment noise into an electrical signal; then extracting feature values of the electrical signal; and outputting a simulated gun sound when similarity of the feature values of the electrical signal and preset gun sound feature values reaches a preset threshold. A real gun sound is caused to be submergedin simulated gun sounds, then the gun sound positioning device is caused to fail to detect the gun sound or is caused to detect multiple false gun sound positions, thus difficulty of detection of thegun sound positioning device on sniper gun sounds is increased, and an effect of protecting a sniper at a side of us from being easily detected and identified is facilitated.

The present invention relates to a road intersection detection method and device based on improved YOLOv3, which mainly obtains road images first; then performs network training to construct an improved YOLOv3 network model; the improved YOLOv3 network model includes a feature extraction terminal and a feature The detection end, the feature detection end includes a plurality of channels, and in each channel, the corresponding convolution module is first widened horizontally to generate different feature maps, and then vertically aggregated; the improved YOLOv3 network model is used to treat The detected road image is recognized and the result is output. That is, the present invention first expands the convolution module in each channel of the improved YOLOv3 feature detection end horizontally to generate different feature maps, and then performs vertical aggregation to make the network width of the convolution module of each channel wider. , enhance the expressive ability of the network, thereby reducing the difficulty of detecting small-sized road intersections in complex remote sensing scenarios, and improving the detection accuracy.

The invention discloses a method, oligonucleotide and kit for detecting a polymorphic mutation site of a WAS gene of a patient with an X-linked recessive inheritance immunodeficiency disease, namely Wiskott-Aldrich Syndrome (WAS syndrome). According to the oligonucleotide, the method and the kit, specific amplification primers and sequencing primers are utilized for detecting the polymorphic hot spot mutation of the WAS gene; the mutation of all exons of the WAS gene in the patients with the WAS syndrome can be rapidly detected; the detection result is accurate, the diagnosis of the WAS syndrome can be assisted; the method, the oligonucleotide and the kit have important significances to the early intervention and treatment.