30results about How to "Detection reached" patented technology

The invention discloses a method for detecting a peer-to-peer (P2P) botnet structure based on network flow clustering. In the method, the detection of the P2P botnet structure is finished by the sequential execution of a real-time communication data acquisition module, a datagram record and filter module, a network flow extraction module, a network flow record and filter module, a network flow clustering module and a data association and result display module. The basic thought of the method is that: a defender determines a command and control relationship between P2P botnet nodes in a monitored network so as to give a P2P botnet structure by identifying a command and control communication in the communication data of the monitored network by utilizing the regularity, namely the characteristics such as the duration, the quantity of datagrams, the quantity of bytes and the like, between the command and the control communication between the P2P botnet nodes. The main innovations are that: communication network flows which have similar characteristics are clustered by a clustering method; and compared with the characteristics in a characteristic set of the command and the control communication, normal communication is distinguished from P2P botnet communication, so that the aim of detecting the P2P botnet structure is fulfilled.

The invention relates to the technical field of biochemical detection, and discloses a CuInS/ZnS quantum dot and a method for detecting alkaline phosphatase by using the quantum dot. The CuInS/ZnS quantum dot is taken as a probe in a system of hydrolyzing disodium 4-nitrophenylphosphate by alkaline phosphatase, the fluorescence intensity was measured under the condition of <lambada>ex/<lambada>em=405/588nm, and the alkaline phosphatase content is obtained through the change of fluorescence intensity and the linear relationship between the alkaline phosphatase and the fluorescence intensity. The optimal excitation wavelength of the CuInS/ZnS quantum dot prepared by the invention is 405nm, and is overlapped with the maximum substrate absorption peak of the PNP (p-nitrophenol), and an inner filtering effect can be generated, so that the purpose of detecting ALP (alkaline phosphatase) is achieved. The detection sensitivity is high, the anti-interference capability is strong, the sample requirement is low, and the direct detection of a serum sample can be realized.

The invention relates to a detection reagent kit and a detection method of soybean phytophthora, solving the problems of long required period (15-20 days) and poor specificity (50-100 oospores/gram of soil) of the biological detection method of the soybean phytophthora in the prior art and belonging to the fields of crop diseases prevention and treatment and plant quarantine. A primer, the reagent kit and the method adopted in the invention have the advantages of strong practicality and high accuracy and sensitivity when used for carrying out PCR (Polymerase Chain Reaction) detection on the soybean phytophthora.

The invention relates to a pulmonary nodule automatic detection method, a pulmonary nodule automatic detection device and a computer system. The method comprises the following steps: acquiring a CT image to be detected; performing filtering enhancement processing on the CT image to be detected to obtain a lung enhanced CT image sequence; segmenting the CT image sequence by adopting a threshold method to obtain an image only containing a pulmonary parenchyma region; cutting the image obtained by the pulmonary parenchyma segmentation module into a plurality of image blocks, and obtaining a region of interest through a multi-scale feature fusion UNet network model; and carrying out automatic detection and identification on the region of interest by adopting a 3D CNN model to obtain a pulmonary nodule detection result. Compared with the prior art, the method has the advantages of high detection sensitivity and precision and the like.

The invention discloses an intelligent air purifying LED advertising lamp box. The intelligent air purifying LED advertising lamp box is characterized in that a photocatalyst nano-material is sprayed on the glass surface of the LED advertising lamp box. The photocatalyst nano-material absorbs luminous energy emitted by an LED light source having a wavelength of 380 nm, and the surface of the photocatalyst nano-material is excited to generate electrons (e-) and holes (h+). A tin oxide semiconductor gas sensor and a peripheral circuit thereof are employed to form a high-sensitivity air quality detector. A high-light-transmittance 380 nm filter, a light sensitive resistor and a peripheral circuit are employed to form an ultraviolet light leakage detector. On the intelligent control aspect, an embedded single-chip microcomputer, a wireless Bluetooth technology and a PWN dimming technology are mainly employed to connect various terminal devices. A working state indicating lamp can display the air quality degree visually and dynamically. When the ambient air pollution degree detected by an air quality sensor reaches preset upper and lower limiting values, the single-chip microcomputer emits a PWN signal, turns on and adjusts an ultraviolet light LED module, and adjusts the luminous intensity of the ultraviolet light LED module, and therefore the response time and intensity of the photocatalyst coating can be controlled, and air can be automatically purified.

The invention relates to a multi-hydrogen-bond melamine core-shell molecularly imprinted polymer and a preparation method thereof. The preparation method comprises the following steps: by adopting SiO2 as an inner core, performing modification on the surfaces of SiO2 nano particles by using 3-aminopropyltriethoxysilane and glutaraldehyde, and connecting a functional monomer 6-aminouracil; and performing polymerization reaction on melamine as a template molecule, methacrylic acid, an initiating agent and a crosslinking agent to prepare the multi-hydrogen-bond melamine core-shell molecularly imprinted polymer. The multi-hydrogen-bond melamine core-shell molecularly imprinted polymer disclosed by the invention can be used for exchanging the roles of a functional monomer in a conventional three-hydrogen-bond molecularly imprinted system and the template molecule, adopts the functional monomer in the conventional system as the template molecule, adopts a template molecule in the conventional system as the functional monomer in a system disclosed by the invention, has very high selectivity, has specific binding only aiming at melamine and triazine compounds, and has good selective enrichment and adsorption effects in highly-specific food detection.

The present invention provides an apparatus for detecting exhaled gas and outside gas. The apparatus comprises a FAIMS spectrometer connected to a sample inlet end and used for detecting exhaled gas, and a carrier gas circulation system connected to the FAIMS spectrometer in series to form a circuit, wherein the carrier gas circulation system comprises a pump for supplying carrier gas circulation power, a quality flow rate controller and a filter, and the width of the chip migration channel of the FAIMS spectrometer is 35 [mu]m. According to the present invention, the detection limit of the apparatus can achieve 10 ppt, and the detection requirement on the trace substances in the exhaled gas can be met.

The invention discloses a voltage detection circuit. The voltage detection circuit comprises a positive detection terminal, a negative detection terminal, a power supply, a switch, a comparator, a voltage stabilizer, a rheostat, a transistor and a display circuit, wherein the positive and negative detection terminals are connected with a positive terminal and a negative terminal of voltage to be detected; a near power supply terminal of the switch is connected with a positive electrode of the power supply; the comparator comprises a normal phase input terminal, an inverting input terminal, a power supply terminal, a grounding terminal and an output terminal; the power supply terminal of the comparator is connected with a far power supply terminal of the switch; the grounding terminal of the comparator is connected with a negative electrode of the power supply; a voltage-stabilizing input terminal of the voltage stabilizer is connected with the far power supply terminal of the switch; a voltage-stabilizing and grounding terminal of the voltage sterilizer is connected with the negative electrode of the power supply; a first fixing terminal of the rheostat is connected with a voltage-stabilizing outer terminal of the voltage stabilizer; a second fixing terminal is connected with the negative electrode of the power supply; a free terminal is connected with the inverting input terminal of the comparator; a grid electrode of the transistor is connected with the output terminal of the comparator; one of a source electrode and a drain electrode of the transistor is connected with the far power supply terminal of the switch; and the display circuit is connected with the other one of the source electrode and the drain electrode of the transistor.

The present invention discloses a building structure vibration monitoring device which comprises a fixed plate, the lower side wall of the fixed plate is symmetrically in threaded connection with bolts, the lower side wall of the fixed plate is symmetrically in threaded connection with threaded rods located between the two bolts, and the outer walls of the two threaded rods are jointly and fixedly sleeved with a mounting plate. A horizontal calibration device is arranged on the mounting plate, and a swing rod is rotationally connected to the center of the lower side wall of the mounting plate. The levelness of the mounting plate is adjusted by finely adjusting the height difference between the threaded rods, whether the position of the reference bead is located in the center of the calibration plate is observed through the observation opening, so that the levelness adjustment of the mounting plate is completed, the vibration detection accuracy of the whole device is improved, the vibration of a building structure drives the swing rod to rotate, the toothed plate moves upwards, the alarm is powered on to give an alarm sound, and therefore the functions of building vibration detection and early warning are achieved, and safety of people is guaranteed.

The invention discloses environmental testing equipment comprising a base and an equipment body. The upper end of the base is connected to the lower end of the equipment body through an electric telescopic rod. A rotating disc is movably mounted at the upper end of the equipment body. A wind-speed detector is mounted at the upper end of the rotating disc. A boss is arranged on the side face of theequipment body. A dissolved oxygen tester is mounted at the upper end of the boss. A groove is formed in the upper end of the boss. pH test paper is arranged in the groove. An air exchanging fan is mounted on the side face of the equipment body. A fixing plate is arranged in the equipment body. A temperature sensor and a humidity sensor are mounted on the side face of the fixing plate. A controller is mounted in the equipment body. A PM2.5 tester, a displayer and a voice broadcaster are mounted on the outer side of the equipment body. The environmental testing equipment is simple in structure, diverse in function, capable of more comprehensively detecting environmental parameters, wider in applicability and convenient to use.

The invention provides a crystal grain detection method and system for detecting crystal grains on a source wafer. The grain detection method comprises the following steps: electrically connecting a positive electrode and a negative electrode of each grain through a conductive material to form a closed loop; disposing a coil adjacent to the plurality of dies; inputting an alternating voltage to the coil to change the magnetic flux of the coil, generating an induced electromotive force by each closed loop according to the change of the magnetic flux, and enabling the peak value of the induced electromotive force to be higher than the breakover voltage of the crystal grain; and judging whether the crystal grains in each closed loop are conducted with induced current due to induced electromotive force or not.

The invention belongs to preparation of a nano composite material, and relates to a preparation method and application of a nitrogen-doped carbon quantum dot and manganese dioxide composite material, and the preparation method comprises the following steps: preparation of carbon quantum dots, and preparation of a nitrogen-doped carbon quantum dot-MnO2 nano composite material: adding distilled water into a flask, then sequentially adding ethanol, sodium dodecyl benzene sulfonate and sulfuric acid to form a mixed solution, carrying out heating treatment, slowly dropwise adding a potassium permanganate solution into the mixed solution, and continuously stirring; washing so that MnO2 nanosheets are obtained; dispersing the cleaned MnO2 nanosheets with negative electricity in deionized water, and keeping for later use; and adding the nitrogen-doped carbon quantum dot powder into the cleaned MnO2 nanosheet solution, and stirring to obtain the nitrogen-doped carbon quantum dot-MnO2 nano composite material. The preparation raw materials are easily available, and the preparation process is simple. The nitrogen-doped carbon quantum composite manganese dioxide fluorescent probe is constructed, is used for detecting the content of glutathione in vivo or in vitro, and has important value.

The invention relates to a detection method of capsaicin, which uses a benzohydrazone aluminum complex having the structure shown in formula II as a fluorescent detection chromogenic agent for capsaicin. The capsaicin detection method of the invention is convenient and easy to implement, has high sensitivity and strong anti-interference ability, can quickly detect capsaicin, and can be used for detection of waste oil, food additives, environment and the like.

The invention belongs to the technical field of fluorescent probes, and particularly relates to a thiazole orange derivative, preparation and application thereof in mitochondria. The invention provides a thiazole orange derivative in a first aspect. The thiazole orange derivative has a structure shown as formula I in the specification; wherein R1 is a fatty acid amide group of C1-6 and a fatty carboxyl group of C1-6; R2 is a fatty alkyl group of C1-6; the second aspect of the invention provides a preparation method of the thiazole orange derivative. The preparation method comprises the following steps of: reacting a compound with a structure shown as formula VIII with a compound with a structure shown as formula V to obtain the thiazole orange derivative, wherein n is an integer of 0-6; Xis methyl, I, Br or Cl; R5 is an amide group or a carboxyl group; and R4 is methylthio group. The invention provides a thiazole orange derivative for targeted detection of mitochondria and mitochondria G-quadruplex DNA. The thiazole orange derivative can specifically detect mitochondria and mitochondria G-quadruplex DNA.

The invention belongs to the technical field of face filling material processing, and particularly relates to a proportioning device and a proportioning method for face filling material preparation, and the proportioning device comprises a proportioning device tank main body and a raw material automatic proportioning system; the proportioning device comprises a connecting plate and a sealing cover plate, the bottom of the sealing cover plate is movably connected with the top of the proportioning device tank main body, and the top of the sealing cover plate is movably connected with the bottom of the connecting plate, so that the following problems are solved: when most of existing proportioning devices are used, a user measures a premix and then introduces the premix into the proportioning device for subsequent processing, and when different materials are proportioned, the proportioning device is poor in self cleaning effect and inconvenient to move to continuously clean the interior of the proportioning device, so that the use cost and the cleaning difficulty are increased, moreover, the proportioning of the materials increases a certain operation duration of the user, and the operations of automatic proportioning and automatic mixing cannot be effectively carried out, so that the operation frequency of the user is increased.

The invention relates to the technical field of label attachment and detection for a computer main board, and discloses a positioning and labeling rotary device for a computer main board. The positioning and labeling rotary device comprises a shell body, a screw rod is movably connected to the inner part of the shell body, a sliding block is movably connected to the surface of screw rod, a push rod is movably connected to the surface of the sliding block, a paste groove is movably connected to the end, away from the sliding block, of the push rod, a main board is movably connected to the bottom of the paste groove, arc-shaped plates are correspondingly and movably connected to the two sides of the main board, spring pipes are movably connected to the surfaces of the arc-shaped plates, pushrods are movably connected to the ends, away from the arc-shaped plates, of the spring pipes, torsion springs are movably connected to the sides, away from the spring pipes, of the arc-shaped plates,rotating plates are movably connected into the torsion springs, and winding rods are movably connected to the lower surfaces of the rotating plates. When the lower parts of the arc-shaped plates aretightened, the upper part can be driven to move towards the direction close to the main board, then the upper surface of the main board is detected, and thus the effect of detecting the main board byusing the pasting work is achieved.

The invention provides a gas detector, and relates to the technical field of gas detection devices. The gas detector comprises a shell, a sucking pump, a gas detection device, an alarm, a gas outlet pipeline, a plurality of gas inlet pipelines and a telescopic hose arranged in any gas inlet pipeline, wherein one end of any air inlet pipeline is connected with the input end of the sucking pump, and the other end of the any air inlet pipeline is connected with the shell; the output end of the sucking pump, the gas detection device, the gas outlet pipeline and the shell sequentially communicate with each other; the alarm is connected with the gas detection device; and one end of the telescopic hose is connected with the inner wall of the gas inlet pipeline. A user can stretch the telescopic hose according to the size of an environment, so detection in a larger range is achieved; and multi-point detection can be carried out in the range, so detection accuracy is improved.