39results about How to "Weaken the impact" patented technology

The invention discloses a groove flat-grid MOSFET component which comprises an n<-> epitaxial layer connected to the upside of an n<+> silicon substrate layer, wherein a flat-grid G is arranged above the n<-> epitaxial layer, the epitaxial layers at two sides of the flat-grid G are respectively provided with a p base region which is internally provided with an n<+> source region, and a source electrode is formed by short circuit between the n<+> source region and the p base region. The groove flat-grid MOSFET component is characterized in that a groove is arranged between the two p base regions along the middle of the upper end of the n<-> epitaxial layer, the inner part of the groove is filled with a polysilicon gate, gate oxide is filled between the polysilicon gate and the n<-> epitaxial layer, and the gate oxide and the polysilicon gate are respectively connected with gate oxide and polysilicon gate of the flat part above the n<-> epitaxial layer into a whole. The groove flat-grid MOSFET component improves the electric breakdown strength of the component, reduces the on resistance, keeps switch loss unchangeable, increases design and fabrication freedom, has low fabrication cost, and is completely compatible with the prior VDMOS process.

The invention provides an end-to-end speech recognition method based on an adaptive learning rate. The method particularly comprises steps: (1) a bidirectional recurrent neural network is adopted as an acoustic model, a forward recurrent neural network hidden layer h-right arrow and a reverse recurrent neural network hidden layer h-left arrow are calculated respectively, a long-short term memory cell (LSTM) is then adopted to replace the h-right arrow and the h-left arrow, and final output, that is y, of the neural network is obtained; (2) an acoustic model modeling unit in the first step serves as a phoneme, a connectionist temporal classification criterion is adopted, a blank symbol is introduced to assist alignment, an objective function is built and calculated, partial derivative computation is carried out on the objective function relative to the neural network output, an error back propagation algorithm (BP) is then used to calculate the gradient g of a parameter set w in a weight matrix in the first step; and (3) based on the first-order gradient information, that is, the gradient g provided by the second step and in combination of an ADADELTA adaptive learning rate method, the parameter set w is updated.

The invention provides a multi-core fiber based multipath parallel optical transmission structure, comprising multiple single mode / multimode fibers and multiple multi-core fibers, wherein multiple single mode / multimode fibers and multiple multi-core fibers are alternately connected. By applying the optical transmission structure, the power loss during the optical coupling process can be reduced, and the influence of a high order mode to an optical path can be weakened.

An extensible pole component comprises a first supporting pole, a second supporting pole, an expansion sleeve, a screw, an elastic component, a bush and a limiting component, wherein both the first supporting pole and the second supporting pole are in round-cylinder shape, and one end of the first supporting pole is taken in the second supporting pole, the expansion sleeve is taken in the supporting pole. The screw comprises a resist-hole part, a screw-joint part and a guiding part, wherein the screw-joint part and the guiding part respectively extend from two ends of the resist-hole part, the screw-joint part is in screw joint with the expansion sleeve, parts of the resist-hold part are taken in the expansion sleeve to push the expansion sleeve and clamp the expansion sleeve between the screw and the second supporting pole. The bush is fixedly connected at one end where the first supporting pole is taken in the second supporting pole. The guiding part of the screw is capable of sliding, and the screw without rotating is arranged in the bush in a penetrating mode. The elastic component is arranged on the guiding part of the screw in a sleeved mode, and two ends of the elastic component are respectively headed one end where the resist-hold part is far from the screw-joint part and the bush. The limiting component is fixed at one end where the guiding part is far from the resist-hold part and headed one end where the bush is far from the elastic component. The extensible pole component is good in shockproof effect. The invention further provides a lamp.

The invention discloses a method for preparing Ga-doped p-type crystalline silicon. The method is characterized in that a DC electric field parallel to a crystal growth direction is applied to molten silicon liquid during the crystal growth of polycrystalline silicon ingots or monocrystalline silicon rods so as to allow Ga dopant in liquid phase to migrate to a liquid-solid interface; under the dual action of the electric field and solidification segregation, a Ga high-concentration area is formed in the liquid phase of a crystal growth apex so as to improve the doping concentration of subsequently growing crystals, weaken the influence of solidification segregation and obtain p-type polycrystalline ingots or p-type monocrystalline rods of which the Ga content is uniformly distributed in the crystal growth direction; the deviation range of resistivity is reduced; the yield of materials is improved, so that the production cost of silicon chips is reduced and the industrial application of Ga-doped p-type silicon chips has cost feasibility. Meanwhile, the method also applies to the p-type doping with small segregation coefficient of Al, In and the like.

The invention discloses a solar cell panel temperature adjusting and controlling device, belonging to the field of photovoltaic cell panel temperature control. The solar cell panel temperature adjusting and controlling device is characterized in that a phase change material box body is welded and connected with a device shell, and a tempered glass plate is placed at the upper port of the device shell; two long side faces of the device shell are welded with outside radiating ribs; and a solar cell panel base plate is welded with the phase change material box body, an inside needle rib is welded on the solar cell panel base plate, and a phase change material and a thermal diode material are respectively injected into the temperature adjusting and controlling device by forming a heat storage material injection hole and a thermal diode material injection hole. The solar cell panel temperature adjusting and controlling device disclosed by the invention has the advantages that the heat transfer characteristic of a phase change heat storage material is strengthened, and the overall heat conducting property of the device is enhanced, so that the heat dissipation effect of a solar cell panel working under a high temperature condition is achieved, the normal working temperature of the solar cell panel is maintained, the service life of the solar cell panel is prevented from being shortened due to over temperature and heat, the generating efficiency can not be lowered, the influence of a low-temperature environment on the solar cell panel and the tempered glass plate is weakened, and the frost crack is prevented.

The embodiment of the invention discloses a method for distributing WLAN (Wireless Local Area Network) access channels. The method comprises the following steps of: receiving interference detection information sent by wireless access points; and according to the interference detection information, distributing the access channels and sending the distributed access channels to the corresponding wireless access points. The embodiment of the invention also discloses wireless access control equipment, wireless access point equipment and a system for implementing the distribution of the WLAN access channels. By the technical scheme disclosed by the embodiment of the invention, the influence of interference signals on the wireless access can be effectively improved or weakened and the integral efficiency of the wireless access is improved.

The invention discloses an intelligent monitoring camera device with a defrosting function. The device comprises a fixed plate and a controller, wherein a connecting base is fixedly arranged at the left side of the fixed plate; a support plate is arranged at one side far away from the fixed plate of the connecting base; the support plate is hinged to the connecting base through a rotating shaft arranged at the left end of the support plate; a rotating disc is fixedly arranged at the bottom of the support plate; an infrared camera is arranged at the lower side of the support plate; the infraredcamera is hinged to the rotating disc through a connecting rod arranged at the top of the infrared camera; and baffles are both arranged at two sides of the infrared camera. The device detects the outside weather situation through a temperature sensor and a humidity sensor and controls the interior of a regulating box to generate heat through the controller in order to remove falling snow on theinfrared camera, so that the formation of frost after melting, which is caused by accumulating rainwater on the camera, can be avoided, and thus the influence of the external environment on the cameracan be weakened to be helpful for prolonging the service life of the camera.

The invention discloses a medium voltage distribution network power line communication (PLC) networking scheme with a substation topology structure considered. Firstly, the overall structure of a PLCnetwork is built according to the medium voltage distribution network topology structure, and each distribution outgoing line is corresponding to a PLC sub network in a master-slave structure with a relay node; then, a frequency selection process for building a link between nodes is determined, the frequency selection speed is quickened by using the asymmetry of two-way channel characteristics, frequency point preference is completed through twice frequency point tests and simple calculation, and the adjustment of a weight coefficient in the algorithm can flexibly control the quality of the two-way channel; and finally, a PLC central node is arranged on a bus, a sub network main node is arranged in the middle of the line and a hierarchical sub network searching and networking process is completed. The medium voltage distribution network power line communication (PLC) networking scheme with the substation topology structure considered has the beneficial effects that the adverse effectsof the substation topology structure on the PLC system can be weakened, the number of nodes in a carrier system is reduced, the PLC network performance is improved, and the channel conflict in the case of parallel operation of the PLC sub networks can be eliminated.

The embodiment of the invention discloses a vehicle controlling method, device, equipment and medium. The vehicle controlling method comprises the following steps that whether light ray meets a preset condition or not is judged according to the light ray collected by at least one light ray collecting device; and when the light ray meets the preset condition, a vehicle is controlled to change glass color and / or an angle of polarizer. According to the vehicle controlling method, device, equipment and medium, blocking for the light ray which meets the preset condition is realized, the effect of the light ray on a driver is weakened, and the driving safety factor is enhanced.

The invention provides a heat storage device and an air conditioner with the same. The heat storage device comprises a heat storage tank, a heat storage material and a heat exchanger, wherein the heat exchanger is arranged in the heat storage tank and positioned in the heat storage material which is arranged in the heat storage tank, the heat exchanger comprises a first connection port and a second connection port, the first connection port allows a liquid refrigerant to flow in and out, and the second connection port allows a gaseous refrigerant to flow in and out. By application of the heat storage device, heat of the high-temperature gaseous refrigerant is stored by the aid of the heat exchanger through the heat storage material, and the heat can be transferred to the refrigerant through the heat exchanger during defrosting, so that heat supply can be realized. Due to the fact that heat of the high-temperature gaseous refrigerant is directly collected, influences on heat storage capacity of the heat storage device due to overlow outdoor environment temperature and low operating frequency of a compressor can be weakened, and accordingly effectiveness in defrosting can be improved.

The invention relates to a high-strength and high-toughness 2XXX aluminum alloy forging production process. The high-strength and high-toughness 2XXX aluminum alloy forging production process is characterized in that high-strength and high-toughness 2XXX aluminum alloy forgings are machined by ingredients for aluminum alloy ingot machining through smelting, double-stage homogenization, extrusion blank molding, extrusion blank annealing, forging formation and quick T6 heat treatment in sequence. During solid-solution aging, a high temperature of one temperature point above a heat absorbing point is adopted for short-time maintenance; at this time, heat is insufficient to melt intercrystalline metal, but is enough to refine intercrystalline compounds to melt in basal bodies, so that the strength and the plasticity of alloys are improved.

The invention provides a power grid frequency disturbance process wind storage coordination control method and system. The method comprises the steps of obtaining power grid frequency data in real time, and calculating a difference value between a current power grid frequency and a power frequency, determining a current frequency disturbance mode based on the difference value, and according to different frequency disturbance modes, adopting a control strategy reserved based on a pitch angle, considering the influence of the variable pitch rate on the load characteristics of the unit, and using an energy storage device for releasing electric energy. The scheme makes full use of the advantages of convenient energy release, no time delay of power output, stable and controllable power output and the like of the energy storage device, cooperates with the primary frequency modulation control strategy of the wind turbine generator, achieves the purpose of reducing the impact load and fatigue damage of the shaft system, and has a great significance for optimizing the load design of the wind turbine generator, improving the power grid friendliness characteristic of the wind turbine generator and guaranteeing safe and stable operation of units and power grids.

The invention discloses an intelligent gateway for a bus station. The intelligent gateway for the bus station comprises main uprights, base devices, first rubber cushions and a barrier gate handle; the base devices are arranged at the bottom ends of the main uprights; pulleys are fixed at the parts, on the internal sides of the base devices, of the bottom ends of the main uprights; the first rubber cushions and second rubber cushions correspondingly coat the main uprights; and clamping grooves are fixed on the internal sides of the first rubber cushions. According to the intelligent gateway for the bus station, as the base devices and the pulleys are arranged, the device can be stably fixed on the base devices under the mutual action of the first cushions, first soft plates and springs inthe base devices; and therefore, the device cannot easily shake even though suffering a collision; and meanwhile, under the mutual effect of bases, fixing doors, fixing blocks and screws in the base devices, the device is convenient to move so that the working intensity of mounting personnel is reduced, time and labor are saved, the mounting and conveying speed of the device is increased, and theworking efficiency of the device cannot be affected.

The invention provides a flow divider, a heat exchanger and an air conditioner. The flow divider comprises an air inlet pipe and a flow dividing head, a plurality of flow dividing branch pipes are arranged on the flow dividing head, the air inlet pipe and the flow dividing head are in seal connection and form a flow mixing cavity inside, and a spiral flow mixing device for mixing a flow is arranged in the interior of each flow mixing cavity. According to the flow divider, the spiral flow mixing devices are arranged in the interiors of the flow mixing cavities; gas and liquid two-phase mixed fluid can generate strong rotational flowing when flowing through the spiral flow mixing device, so that gas and liquid two-phase mixing is more uniform; furthermore, under the action of a centrifugal force, the influence of gravity to a gas-phase fluid and a liquid-phase fluid can be effectively weakened, and flow division uniformity and stability of the flow divider are improved.

The invention provides a Raman sensing analysis method for detecting enterotoxin, and belongs to the technical field of light analysis. The method comprises the following steps: doping cesium bromide (CsBr) powder and lead bromide (PbBr2) powder into mesoporous silica (MSNs), and preparing space-hindered CsPbBr3-coated MSNs through a high-temperature solvent removal method; growing an Ag island on an Au core through a ligand 2-mercaptobenzimidazole-5-carboxylic acid (MBIA), and synthesizing Au-Ag Janus NPs. In addition, the ligand MBIA acts as a Raman beacon molecule, and shows a very unique and stable Raman signal. The composite material formed by the Au-Ag Janus NPs and the CsPbBr3 (at) MSNs through an antigen and an antibody can be used for greatly amplifying an SERS signal. The Raman signal of MBIA is used as a detection signal so that additional modification of a Raman beacon is avoided. The detection method is high in sensitivity and strong in specificity.

The embodiment of the invention discloses a method and a device for fine tuning of a CNN (Convolutional Neural Network) model. The method comprises the steps of: performing extraction of image features of all the input sample images based on a CNN model through pre-training, and obtaining various types of image features; for each type of image features, employing a clustering algorithm to performclustering of the image features in the type, and obtaining a cluster center of each cluster; employing a preset target function to calculate errors, wherein the target function is configured to gather the image features in each cluster to the cluster center; and performing reverse direction transmission of the errors in the CNN model, and performing updating of parameters of the CNN model. Therefore, images of dirty samples and images of samples with good quality can be respectively and individually clustered so as to reduce mutual influence therebetween, facilitate convergence of the imagesof the samples with good quality, reduce the influence of the dirty samples on the CNN model and simplify the implementation.

The invention discloses a negative pressure device with a noise reduction structure, which comprises a motor component, a motor front cover and a motor rear cover, wherein a motor fixing bracket is arranged in the motor rear cover, a gap is reserved between the motor fixing bracket and the inner wall of the motor rear cover, the motor component is arranged in the motor fixing bracket, gaps are reserved between the motor component and the inner wall and upper end and lower end of the motor fixing bracket, the front cover of the motor is arranged at the upper end of the rear cover of the motor,a plurality of groups of first air outlet holes which are circumferentially distributed are arranged on the side wall of the motor fixing bracket, the side wall of the motor rear cover is provided with a plurality of groups of second air outlet holes which are circumferentially distributed, and the second air outlet holes and the first air outlet holes are staggered; when in work, the device can make the wind surround in the cavity between the motor fixing bracket and the motor rear cover, namely, the wind output from the negative pressure device flows out after passing through the cavity formed by the motor fixing bracket and the motor rear cover, thereby weakening the impact force of the wind and achieving the purpose of noise reduction.

The invention discloses a kit for extracting DNA through a magnetic bead method and a rapid and simple method for extracting polysaccharide fungus DNA. The kit comprises a solution (I), a solution (II), a solution (III), a solution (IV), a washing solution, eluent, and magnetic bead suspension. The solution (II) is innovatively used to remove polysaccharides of fungi, and the interference of extracellular polysaccharides is eliminated during the DNA extraction process. During the test process, the magnetic beads of the kit are preprocessed, DNA is taken as the molecular target, the adsorbing performance of magnetic beads on RNA and proteins is weakened, and the operation has the characteristic of high specificity. The kit is used to extract DNA of polysaccharide fungi, the detection is simple and convenient, and the interference of extracellular polysaccharides on DNA extraction is reduced.

The invention discloses a multi-mode multi-stage codebook joint optimization method, belongs to the technical field of low-bitrate speech coding vector quantization and solves the technical problem that in existing multi-mode multi-stage codebook training, error codes greatly influence the systematic distortion. The multi-mode multi-stage codebook joint optimization method includes: outputting the vectors to be quantified; conducting training on the vectors to be quantified and obtaining the multi-mode multi-stage initial codebooks; conducting the codebook index rearrangement on each multi-mode multi-stage initial codebook and obtaining a new codebook; regarding the vectors to be quantified, seeking the optimal cell and the quantified index which enable the systematic distortion to be smallest through the new codebook; updating the multi-mode multi-stage optimal codon through the input of the residual vectors and the corresponding quantified indexes and iterating the optimal codon to the preset times; and obtaining the codon obtained from the last iteration.

The invention discloses a copper foil perforating machine based on chemical etching. The copper foil perforating machine comprises a copper foil unwinding wheel, a stainless steel lower template, sealing rings, a perforating machine jacket, an etching tank which can be moved up and down, a copper foil winding wheel, a stainless steel upper template, an upper template connecting rod which can be moved up and down, an etching groove internal pressure gage. The invention further provides a production technology for perforated copper foil based on the copper foil perforating machine. The production technology comprises the following step (1) of filling the etching tank with etching liquid, and placing the lower template on the upper edge of the perforating machine jacket; spreading the copperfoil on the lower template flat, and placing the upper template for pressing the copper foil; aligning the upper template to the lower template; the step (2) of pushing the etching tank to rise so that the liquid level rises and is in contact with the copper foil for perforation and etching; and the step (3) of declining the etching tank when the etching liquid overflows from the upper template, and finishing perforation and etching. According to the copper foil perforating machine and the production technology thereof, porous copper foil with high perforation quality and low extent of mechanical damage can be produced, and the quality of finished products is improved; and continuous production is performed so that the production efficiency is improved, and the production process is more environmentally friendly.

The invention discloses a three-dimensional surrounding gas shielded welding welding-head, and belongs to the field of welding devices. According to the three-dimensional surrounding gas shielded welding welding-head, a control circuit-temperature difference path is formed between hot guide wheels and low-temperature guide wheels which automatically draw high heat from initial weld seams of a basemetal through the airflow of four air cylinders. Electric energy supplied by a motor is spontaneously generated through thermoelectric effect, rotation of alternately arranged suction fans and blowing fans is controlled, and finally the three-dimensional surrounding and continuously circulating protective airflow is formed at a certain distance from the periphery of the welding thermal flame. Onthe one hand, the external impurity gas can be prevented from being mixed in, wherein nitrogen-doped and oxygen-doped impurities can be generated in the weld seams, so that the quality of the weld seams is affected; and on the other hand, the influence of the external environment, such as crosswind, on the welding thermal flame is weaken.

The invention relates to a stock index extreme value prediction method based on a top view algorithm. The method comprises an extreme value definition module, a visual graph network construction module, a completely unviewable graph network construction module, a weight-considering visual graph network construction module, a weight-considering unviewable graph network construction module, an extreme value prediction index construction module and an evaluation index construction module. According to the method, the defect that the time sequence is mapped into the complex network by using the visual graph algorithm is improved, the extreme value in the financial time sequence is predicted by using the improved method, and the prediction effect of the improved method is better. According to the method, more detail information is reserved in the process of mapping a time sequence to a complex network through a weighted visual graph algorithm based on an overlook angle; through a visual graph algorithm based on neighbor communities, the influence of adjacent nodes on the observation nodes is weakened.

The invention discloses a device for reducing fluid oscillation in a moon pool in sailing of a drilling ship. The device comprises a first damping box and a second damping box, wherein the first damping box and the second damping box are arranged at the bottom of the moon pool; one end of each of the first damping box and the second damping box is hinged to the inner wall of the moon pool; the other ends of the first damping box and the second damping box are both circular arc-shaped; when the first damping box and the second damping box are horizontal, the bottom of the moon pool can be sealed by the first damping box and the second damping box; the first damping box and the second damping box are respectively connected with a driving device; the driving device is used for driving the first damping box and the second damping box to rotate around the inner wall of the moon pool. By adoption of the device for reducing fluid oscillation in the moon pool in sailing of the drilling ship, vortexes caused by sudden structure change when fluid flows through the bottom of the moon pool with a large opening can be well reduced by virtue of the damping boxes, impact of the vortexes to the inner wall of the moon pool can be weakened, ship shaking can be reduced, and ship sailing resistance can be reduced.

The present invention provides a wireless electric energy transmission system and a preceding-stage high-frequency power source design method thereof, and relates to the technical field of wireless electric energy transmission. The system comprises an AC-DC adjustable direct current power source configured to convert an alternating current low-frequency electric supply to an input direct voltage of a high-frequency inverter circuit; a high-frequency inverter circuit taken as a preceding-stage high-frequency power source of the wireless electric energy transmission system; a DSP control circuitconfigured to modulate the on-off of a switching device in the high-frequency inverter circuit; a drive circuit configured to amplify DSP signals and convert the DSP signals to drive signals configured to drive the switching device; a receiving coil taken as a transmitting coil as a load of the high-frequency inverter circuit; and a receiving coil directly connected with the a load requiring power to form a load circuit loop. The present invention further provides a method for design of the preceding-stage high-frequency power source in the wireless electric energy transmission system. The wireless electric energy transmission system and the preceding-stage high-frequency power source design method thereof greatly improve the working frequency of the wireless electric energy transmissionsystem so as to improve the transmission distance and the efficiency between the coils.

The embodiment of the invention discloses a diaphragm and a laser. Dust deposition of an optical system is prevented by arranging a dustproof mirror on a diaphragm base body, and meanwhile, an arc-shaped curved surface of the dustproof mirror is obliquely arranged, so that the adverse effect on the performance of the optical system caused by the arrangement of the dustproof mirror is greatly reduced. The diaphragm in the embodiment of the invention comprises a diaphragm base body and a dustproof mirror, wherein the available light emitting end of the diaphragm base body is provided with a diaphragm hole; the dustproof mirror is designed into an arc-shaped curved surface; the dustproof mirror is provided with a light-transmitting hole which is light-transmitting but is not through, and the light-transmitting hole is used for transmitting available light emitted from the diaphragm hole; and the dustproof mirror is fixed on the outer end face of the available light emitting end of the diaphragm base body.

The invention discloses a mixing device based on improvement of moving convenience, wherein the mixing device at least includes 2 fixed columns; the fixed columns are provided with a fixed plate; the center of the fixed plate is provided with a circular through hole; a tank body passes through the circular through hole and is fixed on the fixed plate, and the bottom of the tank body is provided with a discharge pipe; the discharge pipe is provided with a valve; the top end of the tank body is provided with a motor; a power output end of the motor is connected with a rotating shaft; the rotating shaft is arranged inside the tank body and is connected with a cylinder body through a connecting rod, and an annular space is formed between the rotating shaft and the cylinder body and is provided with a feed inlet; the outer wall of the cylinder body is provided with stirring blades; the inner wall of the cylinder body and the outer wall of the rotating shaft are each provided with a plurality of inclined plates; the bottoms of the fixed columns are provided with idler wheels, and the side walls of the fixed columns are hinged with supporting plates. The problems that a conventional stirring device has the bottom easy to damage and is not convenient to move are solved.

The invention relates to a satellite gravity field inversion method and system based on bidirectional integration. The satellite gravity field inversion method based on bidirectional integration comprises the steps of obtaining an initial epoch and a tail epoch of an orbit in a to-be-inverted satellite gravity field; obtaining a satellite gravity field inversion model; and inputting the initial epoch and the tail epoch into the satellite gravity field inversion model to complete inversion of the satellite gravity field. According to the satellite gravity field inversion method and system basedon bidirectional integration, the satellite gravity field inversion model is adopted to invert the satellite gravity field, the influence of system errors on the satellite gravity field inversion result can be greatly weakened, and the satellite gravity field inversion precision is improved.