42results about How to "Guaranteed margin" patented technology

The invention discloses a machining process of middle-long thin-wall blades, which belongs to the technical field of machining of blades. The machining process is implemented by a detailed process of integrated rough machining and integrated fine machining, wherein the integrated rough machining comprise the specific steps of rough machining of each surface of a blade tip, each surface of a blade root and a molded surface of a steam passage; and the integrated fine machining comprises the specific steps: semifinishing of each surface of the blade tip and each surface of the blade root, fine machining of each surface of the blade tip, each surface of the blade root and each residue, semifinishing of the steam passage and fine machining of the steam passage. According to the machining process of the middle-long thin-wall blades, the operation is simple and convenient, the use is convenient and fast, the cost is low, the machining efficiency is high, and the operation is easy and labor-saving; and the deformation of the middle-long thin-wall blades is controlled within 0 to 0.8mm, the normal machining of a subsequent mold correction process is facilitated, and the machining of each blade is finished once.

The invention relates to a circuit for eliminating noise of a switching power supply. The circuit comprises a transformer, a primary winding of the transformer is connected with an alternating current input end, a secondary winding is connected with a direct current output end, and the circuit further comprises at least one group of symmetrical Y capacitors, wherein a first Y capacitor in the group of the symmetrical Y capacitors is respectively connected with the positive input end of the alternating current input end and the negative output end of the direct current output end, and a second Y capacitor is respectively connected with the negative input end of the alternating current input end and the negative output end of the direct current output end. By arranging the symmetrical Y capacitors, not only can the purpose of eliminating the noise be achieved, but also the characteristics of high efficiency and good EMC (electromagnetic compatibility) performance can be realized in comparison with the prior art. In addition, the circuit for eliminating the noise has the advantages that the volume of the switching power supply can reduced and the cost and process are reduced in comparison with a 3Pin input structure in the prior art; and furthermore, the circuit has universal practicability in strong plug-in connection type power supplies.

The invention relates to a double-power source changeover switch, in particular, a screw drive type double-power source changeover switch. According to the technical schemes of the invention, the screw drive type double-power source changeover switch is characterized in that a drive switching mechanism comprises a motor which is arranged on a base and is located between two circuit breakers, an incomplete gear which is in linkage connection with the output shaft of the motor, as well as a first gear and a second gear which are located at two sides of the incomplete gear and are engaged with the incomplete gear; the first gear is connected with a first screw pair; a push handle is in linkage matching with the handle of one circuit breaker so as to drive the circuit breaker to be switched on or switched off; and a second nut on a second screw pair is provided with a second push arm. With the above technical schemes adopted, the screw drive type double-power source changeover switch provided by the invention has the advantages of simple structure, low cost and high reliability and dual-purpose performance. With the screw drive type double-power source changeover switch adopted, switching between a lock state and an unlock state can be carried out.

The invention discloses an array substrate, a preparation method of the array substrate and a display panel. The array substrate comprises a plurality of spacer pads for supporting spacers, wherein the supporting end of each spacer pad is provided with at least one concave portion. The array substrate is applied to the display panel, the array substrate is connected with a color film substrate, and the spacer pads correspond to the spacers in a one-to-one mode and are used for supporting the spacers; the supporting end of each spacer pad arranged on the array substrate is provided with one or more concave portions, and the size of the supporting end of each spacer pad can be increased, namely the spacers arranged on the color film substrate can move in a larger range on the spacer pads but the contact area of each spacer and the corresponding spacer pad cannot be increased; meanwhile, by means of the arrangement of the concave portions, friction force between the spacers and the spacer pads can be increased, the spacers can be prevented from deviating when the display panel bears external pressure, and the light leaking phenomenon of the display panel is reduced.

The invention provides an electrocardiosignal denoising method based on improved EMD (Empirical Mode Decomposition) and threshold method fusion, and belongs to the technical field of signal wave filtering. The mode mixing problem is solved by adding white noise with different weight coefficients. The end point problem is solved by a method of a least squares support vector machine. Signal upper and lower envelope lines are constructed by a conformal spline interpolation method; and cubic spline interpolation with second-order approximation accuracy, few segments and small calculation quantityis constructed by a conformal segmentation method. The method can be used for inhibiting the envelope fitting overshoot/undershoot problem; IMF (Intrinsic Mode Function) component sieve termination criterion is provided by the decomposed IMF orthogonality and energy properties; the orthogonality and completeness of the EMD are ensured; the amount of noise contained in the sieved IMF signals is judged through a mutual information principle, whether the filtering processing is needed or not is determined, and the high speed of an EMD algorithm is accelerated; a threshold function is improved;the threshold function combines with the advantages of soft-hard thresholds; and the filtering processing is performed on IMF containing the noise.

The invention relates to a water treatment sterilization method by ultraviolet catalysis hydrogen peroxide matched with chlorine/chloramine, belonging to the technical field of the sterilization in water treatment. The water treatment method is used for sterilizing the water by the chlorine/chloramine based on ultraviolet and hydrogen peroxide photocatalysis sterilization. The method comprises the steps of: adding 0.05-0.20mmol/L of hydrogen peroxide during ultraviolet irradiation, and feeding 0.10-0.20mg/L of chlorine into the water which is irradiated by the ultraviolet to sterilize; or adding 0.05-0.20mmol/L of hydrogen peroxide during the ultraviolet irradiation, and feeding 0.20-0.40mg/L of chloramine into the water which is irradiated by the ultraviolet to sterilize. The method is used for producing hydroxyl radical which is high in oxidability by the ultraviolet catalysis hydrogen peroxide, the deactivation effect to chlorine and ultraviolet-resistant sterilized microorganism is greatly improved due to the synergistic sterilization effect of the hydroxyl radical and the chlorine/chloramine, so that the biological safety and the chemical safety of the water can be guaranteed, and the method can be widely used for sterilizing and purifying drinking water.

The invention relates to a deformation rectifying method for plate carburizing and quenching gears, and belongs to the technical field of metal thermal treatment. The method comprises steps of measuring and selecting, pre-moving stress, preparing a tool, mounting a workpiece, re-quenching, tempering and the like. By adopting the deformation rectifying method, the large end of a common normal line of a to-be-rectified gear faces downwards and is in direct contact with a tray higher than the gear, so that the cooling speed of the part of the gear can be reduced, thermal treatment expansion of the part is relatively small, and the phenomena of a relatively shallow carburized layer and a gear root step caused by too great follow-up milling amount due to secondary quenching are avoided; and meanwhile, the cooling speed for the upper end of the gear is relatively high, and the thermal treatment expansion is greater, so that the defect of a relatively small size of the common normal line after primary carburizing and quenching is compensated.

The invention relates to a swarm type carrier loader cooperative carrying control system and method. The system comprises at least two binocular camera devices, a plurality of radar devices, a GPS positioning device, a weighing sensor and a central processing module. When multiple carrier loaders carry out swarm type cooperative transportation, the method controls the operation of the carrier loaders according to the following steps of (1) main carrier parking position judgment, (2) main carrier parking execution, (3) slave carrier parking execution, (4) driving rotating speed judgment and execution and (5) scene judgment and tracing. The system and method are conducive to swarm type cooperative transportation of large cargos.

A totally-laparoscopic circular stapler nail anvil embedding device is characterized by comprising a metal bar (1) and a nail anvil (4), wherein one end of the metal bar (1) is a connecting end (2); the other end of the metal bar (1) is a guiding end (3); the head end of the nail anvil (4) is shaped like a spherical umbrella; the other end of the nail anvil (4) is a center rod (5); the tail end of the center rod (5) is connected with a puncture head (6); and the connecting end (2) of the metal bar (1) is connected with the puncture head (6). After the adoption of a nail anvil embedding method provided by the invention, a circular stapler nail anvil can directly penetrate through the side wall of an esophagus without the need of purse string suture, so that the cutting position of the esophagus is heightened, which can guarantee the resection margin of cancer at the joint of the esophagus and a stomach and improve the effect of radical treatment of cancer. Meanwhile the method avoids the phenomenon that the wall of the esophagus crimps due to purse string tightening, the nail anvil is closer to a nail bin, the nailing is tighter, the probability of incomplete anastomosis is reduced, and thus the probability of laparoscopic esophagus-jejunum anastomotic leakage complications can be reduced remarkably.

The invention discloses a system for realizing parallel operation of two generators of an unmanned aerial vehicle and its adjustment and testing method, including a left generator, a right generator, a left generator controller, a right generator controller, a left grid contactor, The right grid contactor and the central bus bar, the left generator is connected with the left generator controller through the signal line, the right generator is connected with the right generator controller through the signal line, and the left generator controller and the right generator controller are connected through The signal line is connected, the left generator controller is connected with the left grid contactor through the signal line, the right generator controller is connected with the right grid contactor through the signal line, the left generator is connected with the left grid contactor through wires, the right The generator is connected to the right grid contactor through wires, and both the left grid contactor and the right grid contactor are connected to the central bus bar through wires. Equilibrium control is achieved by adjusting the test method. The invention can effectively utilize the power supply of the unmanned aerial vehicle, reduce the weight of the aircraft, save the installation space, and increase the output power of the power supply.

The invention relates to a fracturing truck hydraulic system and a control method thereof. The system comprises an engine, an oil pump, a hydraulic motor and at least one energy accumulator, the engine is in driving connection with the oil pump, the oil pump is connected with the hydraulic motor through a high-pressure oil way and a low-pressure oil way, the hydraulic motor is suitable for being in driving connection with a fracturing pump, and the energy accumulators are connected into the high-pressure oil way between the oil pump and the hydraulic motor. According to the technical scheme, the operation stability of the fracturing truck hydraulic system can be guaranteed.

The invention belongs to the technical field of disinfection of drinking water, and relates to a control method for chlorine-resistant bacteria in drinking water. The control method comprises the following main steps: (1) controlling a pH value of a bacterial liquid sample to be 6.5 to 8.5; (2) adding a peroxymonosulfate, a peroxydisulfate or a mixed chemical of the monosulfate and the peroxodisulfate according to a ratio of 1: 1 into the sample; (3) carrying out treatment with a medium-pressure ultraviolet lamp tube commonly used in actual water treatment; and (4) adding sodium hypochlorite or chlorine dioxide as a disinfectant into outgoing water obtained by treatment, wherein the time of disinfection and the remaining amount of a disinfectant meet the requirements of the Sanitary Standard for Drinking Water (GB5749-2006). The method provided by the invention adopts a combined disinfection form of a persulfate, UV and sodium hypochlorite/chlorine dioxide to form advanced oxidation, can effectively cope with the problem of propagation of the chlorine-resistant bacteria in source water, can maintain the remaining amount of the disinfectant in pipe network water up to standards, andcan comprehensively guarantee the microbiological safety of the drinking water.

The invention provides an LEO-to-HEO multi-orbit satellite measurement and control system and method. The LEO-to-HEO multi-orbit satellite measurement and control system comprises an orbit measurementmodule, a first telemetry module, a second telemetry module and a remote control module. The orbit measurement module is configured in a mode of combining USB (Universal Serial Bus) orbit measurementwith GNSS (Global Navigation Satellite System) orbit measurement. The remote control module is configured to realize global beam coverage by combining two pairs of measurement and control transceiverantennas and receive remote control signals in all track operation phases. The first telemetry module is configured to realize global beam coverage by combining the two pairs of measurement and control transceiver antennas and transmit low-power telemetry signals in the LEO orbital phase and the early orbit transfer phase. The second telemetry module is configured to achieve hemispherical beam coverage in a single-antenna transmitting mode, achieve time-sharing global beam coverage through switching of two measurement and control transmitting antennas and transmit high-power telemetry signalsin the later orbit transfer phase and the HEO orbital phase.

The invention discloses artificial-intelligence medical-image-aided diagnosis equipment, and belongs to the technical field of medical-image-aided diagnosis equipment. In the artificial-intelligence medical-image-aided diagnosis equipment, an output end of a motor is fixedly connected with a screw; an outer wall of the screw is in threaded connection with a threaded tube; a slide rail is fixedly arranged at the bottom of an inner cavity of a protective box; a slide rest, which fits with the slide rail, is fixedly arranged at the bottom of the threaded tube; a first hinge block is fixedly arranged at the top of the threaded tube; a support rod is hinged with the first hinge block by pin-shaft movement; a support airbag is fixedly arranged at the bottom of a first support plate; the bottom of the support airbag is fixed at the top of the protective box; an air pump is fixedly arranged on the right side wall of the protective box; a guiding slide rack, which is hinged with the top of thesupport rod in a movable way by a pin shaft, is assembled at the bottom of a second support plate in a movable way so as to allow adjustment of the angle between a patient's body and the patient's head; and moreover, separate stepless adjustment on the patient's body and the patient's head is also allowed, so that application range of the artificial-intelligence medical-image-aided diagnosis equipment is relatively wide.

The invention discloses a method for manufacturing a defect simulation test block for a polyethylene pipe hot-melt welded joint, which comprises the following steps of: 1, selecting a defect-free polyethylene pipe to manufacture a defect prefabricated pipe and a butt joint pipe, and prefabricating defects at one end of the defect prefabricated pipe according to the defect type of the hot-melt welded joint to form a defect distribution end, wherein the prefabricated defect is in a standard shape; 2, enabling the defect distribution end of the defect prefabricated pipe and the butt joint pipe to be subjected to hot melting welding, and forming a hot-melt welded joint; and axially cutting the defect prefabricated pipe and the butt-joint pipe which are subjected to hot-melt welding to form the polyethylene pipe hot-melt welded joint defect simulation test block. In the defect prefabrication process, the defect character is standardized into a regular shape as the standard defect form for detection technology verification and scientific research, and prefabrication and quantitative measurement of the defect are facilitated. By changing the shape of the defect, the manufactured defect can be closer to the actual shape on site, and simulation and comparison of the actual defect are more convenient.