158results about How to "Limit size" patented technology

The invention discloses a LiDAR point cloud filter method based on gradient and area growth. The method mainly includes the steps of firstly, acquiring the original LiDAR point cloud data; secondly, rejecting gross errors; thirdly, gridding rules; fourthly, selecting ground seed points; fifthly, performing area growth; sixthly, using the grids where the new ground points satisfying the conditions as centers and using the point, with the lowest elevation, in the grids as the new seed points for growing according to the fourth step until no points satisfy the conditions, and stopping growing; seventhly, sequentially performing area growth on seed points and centralized seed points according to the fourth step and the fifth step until the whole process is finished. By the method, the elevation threshold size is limited effectively, the calculation quantity of the whole method is lowered effectively, and the ground points and non-ground points in LiDAR point cloud data of complex cities can be separated fast. In addition, the method is simple, and the result obtained by the method is relatively small.

The invention discloses a face deception detection system adversarial sample generation method based on an adversarial generative network, and the method can achieve the quick generation of adversarial samples in a large scale according to an original sample image through employing the adversarial generative network technology. Meanwhile, the glasses shape mask is utilized, so that the added countermeasure disturbance is limited in the range of the glasses shape, the actual physical attack can be conveniently carried out in subsequent actual manufacturing, and the countermeasure sample has higher practical value. On the other hand, different face deception detection networks or traditional methods are accessed to the overall training framework, so that adversarial samples for different detection methods can be conveniently generated. The problem that the face spoofing detection system lacks enough adversarial samples in the training process is effectively solved. The confrontation samples of the face spoofing detection method can be automatically generated on a large scale, the difficulty of obtaining a large number of confrontation samples for network training is reduced, and thesafety and reliability of the face spoofing detection method and the face recognition system are improved.

The invention discloses a radio frequency respiration monitoring system and a compressive sensing implementing method. A radio frequency sensing network is formed by radio frequency nodes of the system; the radio frequency network is connected with a server through a base station; and the server is used for data storage and processing. The compressive sensing implementing method comprises the following steps of carrying out compressive sampling on a radio frequency link Received Signal Strength (RSS) signal in a random manner; reconstructing a respiratory movement signal by a sparse reconstruction algorithm; and extracting a respiration frequency value. According to the invention, thoracico-abdominal respiratory movement information is acquired by detecting the radio frequency link RSS signal; passive respiration monitoring is implemented; detection comfort is obviously improved; and respiration monitoring is simpler and more humanized. The radio frequency sensing network has low price, is convenient to deploy, is suitable for ubiquitous deployment and can be widely applied to places such as hospitals, clinics, nursing homes and families. A compressive sensing mechanism is introduced so as to not only limit data acquisition scale and reduce data transmission and storage cost, but also reduce energy consumption of the radio frequency sensing network and meet the application requirement for continuously monitoring for a long time.

To overcome the difficulties inherent in conventional proton therapy systems, new techniques are described herein for synchronizing the application of proton radiation with the periodic movement of a target area. In an embodiment, a method is provided that combines multiple rescans of a spot scanning proton beam while monitoring the periodic motion of the target area, and aligning the applications of the proton beam with parameters of the periodic motion. For example, the direction(s) and frequency of the periodic motion may be monitored, and the timing, dose rate, and/or scanning direction and spot sequence of the beam can be adjusted to align with phases in the periodic motion.

The invention provides a numerical control rocker arm drilling machine, belonging to the field of processing machinery. The technical scheme of the invention is as follows: the invention comprises a stand column, a rocker arm which is installed on the stand column, and a main shaft box which is installed on the rocker arm and a base which is fixedly connected with the bottom part of the stand column; a numerical control drive assembly is arranged between the main shaft box and the rocker arm, and the main shaft box moves along the rocker arm in the numerical drive assembly; the main shaft is provided with the numerical control drive assembly for main shaft speed change and feed; the rocker arm is provided with the numerical control drive assembly for the swinging of the rocker arm. The technical scheme can be realized by reforming current rocker arm drilling machine, and can be realized so long as adopting the structure of inner columns and outer columns; therefore, a high-quality numerical control device can be built by spending a small amount of expenses, thus the promotional value thereof can be imaginable.

The invention provides an RLC PDU transmission method for an LTE mobile communication system. The method is characterized in that an RLC layer reports the size of each RLC SDU which needs to be transmitted of each logic channel to an MAC layer, the number of bits which can be transmitted in one subframe by each logic channel of each UE is limited at the MAC layer, resources are only distributed to an integer number of RLC SDUs, and the number of bits which can be transmitted in one subframe by each logic channel is finally determined. Through the technical scheme of the invention, one logic channel of at most one UE of one subframe can be segmented during assembly of the RLC PDUs, so that the resources of one subframe cannot be occupied by one UE while the RLC segmentation opportunity cannot be increased, the size of the RLC PDUs is effectively limited, and the segmentation opportunity during retransmission of the RLC layer is reduced. Through application of the technical scheme, the complexity and the processing overhead of the LTE mobile communication system are greatly reduced.

The invention provides a method of implementing the mobile separated management of a compression radio frequency tomography. The method has the advantages of small redundancy, flexibility, high sensing efficiency and scale zooming, and can be used for observing various particles. The method is implemented based on mobile platform. The method of implanting the mobile separated management of the compression radio frequency tomography includes the following steps, step 1 is to arrange a mobile platform with a radio frequency sending and receiving device at the sensing area, step 2 is to image coarsely on the whole area and to position a region of interest, step 3 is to imagine finely on the part area of the region of interest, and step 4 is to obtain the resultant image by synthesizing the coarseness imagine of the whole and the fine-grained imagine of the part. The method of implementing the mobile separated management of the compression radio frequency tomography is achieved with the cooperative sensing of a mobile robot.

The invention provides an N-and-P double-doped carbon fiber-loaded CoP composite catalytic material as well as a preparation method and application thereof, belonging to the field of aluminum air batteries. The preparation method comprises the following steps: mixing a ZIF-67 organic solution and a polyacrylonitrile organic solution to obtain a spinning precursor solution; performing electrostatic spinning on the spinning precursor solution to obtain a flexible film; pre-oxidizing the flexible film to obtain a pre-oxidized product; and mixing the pre-oxidized product with red phosphorus, and carrying out pyrolysis in a protective atmosphere to obtain the CoP@G/NP-PCNFs composite material. According to the invention, ZIF-67 particles have an atomic-level confinement dispersion effect on the Co element, and are combined with electrostatic spinning, and carbonization and phosphorization are carried out in a pyrolysis process, so the formed carbon fibers have relatively high conductivity; and the carbon spheres derived from the ZIF-67 particles wrap the CoP particles, so an ORR reaction can be promoted to conducted in a four-electron path, and battery efficiency is improved.

The invention belongs to the field of electrocatalysts, and particularly relates to a preparation method and applications of a high-performance carbon-based composite catalyst for producing hydrogen by electrochemically decomposing water, wherein the Ru/NC electrocatalyst is obtained by using nitrogen-doped carbon (NC) synthesized through complexing, calcining and acid washing as a substrate material and using ethylene glycol as a reducing agent under a reflux condition. According to the invention, the electrocatalyst material has low charge transfer resistance and reaction barrier of hydrogenevolution reaction, and has excellent performance in electrocatalytic hydrogen evolution reactions; Ru has the lowest price in Pt series precious metal materials, so that the catalyst is low in cost;and the obtained catalyst is simple and convenient in experimental operation, simple in process and excellent in catalytic performance, and provides the basic application research for the materials in the field of electro-catalysis.

The invention provides a preparation method of a ternary compound photocatalyst. The preparation method comprises S1) mixing MOFs (metal-organic frameworks) and noble metal salts in a first solvent and performing irradiation to obtain noble metal-compounded MOFs; S2) mixing the noble metal-compounded MOFs, a sulfur source and metal salts inside a second solvent and performing irradiation to obtain the ternary compound photocatalyst. Compared with the prior art, the preparation method applies irradiation, which is high in penetrating power and can uniformly grow noble metal and metal sulfide nanoparticles on the MOFs substrate; meanwhile, the porous structure of the MOFs can effectively limit the size of the metal sulfide nanoparticles to avoid particle agglomeration and inhibit compounding photo-induced electron-hole pairs; meanwhile, with the Schottky barriers formed by noble metals and the MOFs, the efficiency the ternary compound photocatalyst for separating the photo-induced electron-hole pairs can be enhanced, and further the ternary compound photocatalyst is excellent in performance when applied to hydrogen production through water decomposition by visible light.

The present invention provides a sensor installation structure which remarkably facilitates installation of a plurality of sensors disposed on the inlet pipe side of an engine and enables each of the sensors to be positioned in an accurate measuring position. The sensor module unit is integrally provided with a plurality of sensors necessary for fuel supply control and intake-air flow rate control in an internal-combustion engine, and has an intake-air temperature sensor holding portion installed with an intake-air temperature sensor, at least one of a throttle position sensor holding portion installed with a position sensor to detect an opening angle of a throttle valve in an intake throttle apparatus and an intake-air pressure sensor holding portion installed with an intake-air pressure sensor, and a unit main body that integrally accommodates the intake-air temperature sensor holding portion, and at least one of the throttle position sensor holding portion and the intake-air pressure sensor holding portion to position in respective predetermined arrangement positions in the unit, whereby each of the plurality of sensors is positioned in a predetermined measuring position in the throttle apparatus when the unit main body is installed in the vicinity of a throttle axis of the intake throttle apparatus.

The invention discloses an overvoltage protection device for a neutral point of a transformer. The overvoltage protection device comprises a lightening arrester, a discharging gap, an isolation transformer, a measuring unit, a control unit and a high voltage impulse generator unit, wherein the measuring unit measures the amplitude value and time duration of power frequency voltage of the lightening arrester, when the amplitude value of the power frequency voltage exceeds a preset voltage value and the time duration also exceeds a preset value, the control unit sends a trigger signal to trigger the high voltage impulse generator unit to generate high voltage impulse; after being boosted by the isolation transformer, the high voltage impulse induces a trigger electrode to generate spark and discharge, and further induces the discharging gap to discharge, thereby restricting the size and duration time of the power frequency voltage of the lightening arrester, accurately matching the protection characteristics of the discharging gap and the lightening arrester, avoiding the explosion caused when the lightening arrester is subject to long-time power frequency follow current. Therefore, the overvoltage protection device for a neutral point of a transformer provided by the embodiment of the invention can operate safely and operating parameters of the device can be controlled and adjusted very easily.

The invention relates to a method for preparing a polymer clad nickel aluminum alloy/sulfur composite electrode material. The method is characterized by comprising the steps of: by taking hollow nickel aluminum alloy nanometer powder as a carrier for the polymer clad nickel aluminum alloy/sulfur composite electrode material, carrying out heating sublimation, diffusion, and condensation on sulfur to obtain a nickel aluminum alloy/sulfur composite material; ultrasonically dispersing the nickel aluminum alloy/sulfur composite material and a polymeric precursor in an alcohol-water blend, then adding a catalyst, and carrying out polymerization, stirring, deposition, filtering, collecting, and drying to obtain the polymer clad nickel aluminum alloy/sulfur composite electrode material, wherein the nickel aluminum alloy is one of NiAl3 and NiAl2, sulfur accounts for 30-70% of the total mass of the polymer clad nickel aluminum alloy/sulfur composite electrode material, and a polymer accounts for 0.5-10% of the total mass of the polymer clad nickel aluminum alloy/sulfur composite electrode material. When used as the positive electrode for a lithium sulfur battery, the composite material has a good specific capacity and excellent cycling performance, wherein the first discharge capacity is greater than 500mAh/g, and the discharge specific capacity retention rate is greater than 74% after 100 cycles.

The invention provides a text error correction method and device. The text error correction method comprises the following steps: inputting a word vector array corresponding to a text to be correctedinto a preset encoding module, obtaining a first hidden state vector array, inputting the first hidden state vector array into a decoding module, and for each decoding position, determining a decodingvector according to a second hidden state vector corresponding to the decoding position, an attention vector and the first hidden state vector array; and according to the decoding vector of the decoding position, a global word list and a limited word list corresponding to the words of the decoding position, determining the decoding result of the decoding position, so as to determine the text after being corrected corresponding to the text. In the text error correction method, the first hidden state vector array is adopted when the decoding vector is determined, so that the word sequence of the text is considered, and the accuracy of the error correction result is ensured; and due to the adoption of the limited word list, the size of the understanding space is limited, and the complexity of the error correction model is reduced, and the convergence speed of the model is increased.

A light emitting diode (LED) lamp includes an emission unit comprising one or more LED light-emitting devices and a circuit substrate whereon the one or more LED light-emitting devices are mounted; a heat dissipating member whereon the emission unit is mounted and that dissipates heat generated by the emission unit; and a light-transmitting lamp cover directly contacting the heat dissipating member and coupled with the heat dissipating member so as to cover the emission unit, wherein the lamp cover is formed of a light-transmitting material having a thermal conductivity equal to or greater than 9 W/m·K⁻¹.

The invention provides an electromagnetic mold clamping mechanism of an injection molding machine, comprising a head plate, a secondary plate and an end plate which are sequentially arranged in parallel, wherein a magnetic plate is arranged between the secondary plate and the end plate; the magnetic plate is fixedly connected with the head plate through a pulling rod; a mold moving mechanism is arranged between the magnetic plate and the end plate; a mold adjusting column is arranged on the back of the secondary plate; the mold adjusting column is connected with a mold adjusting mechanism after penetrating through the central hole of the magnetic plate and the center of the end plate; the plane of the tail end of the magnetic plate is provided with the center hole, and is also equally provided with a plurality of magnetic poles in lines and rows; coils on the magnetic poles generate magnetic force after positively charging; the magnetic force tensions the end plate and the magnetic plate; and the coils on the magnetic poles do not generate the magnetic force to external parts after negatively charging. The mechanism has the advantages that: 1, the end plate can be equally absorbed on the magnetic plate; 2, the mechanism can strengthen the close attach between the magnetic plate and the end plate so as to ensure size and stability of mold clamping force; 3, the mechanism is energy-saving; 4, the mechanism is safe; and 5, the gap delta between the magnetic plate and the end plate is ensured.

The invention of the current application is directed to a wastewater treatment apparatus. The invention includes a divided membrane electrochemical cell including an anode contained within a anode compartment and cathode contained within a cathode compartment. The anode compartment and said cathode compartment are separated by a proton selective membrane. The invention also includes a voltage source, and a liquid-gas separator. The invention is an economically viable electrochemical advanced oxidation system that can cost-effectively treat recalcitrant COD with low energy, without the necessity for chemicals, and reduce or prevent sludge production in a single step.

The invention discloses a motor power level simulation method and device. The method is operated in an FPGA of a motor simulator to ensure that simulation periods can be shortened to be below 100ns, thereby improving the sampling precision of signal acquisition of to-be-tested controllers and then improving the accuracy of tracking waveforms of current. The method comprises the following steps of:judging whether an absolute value of an average value of each phase of current in all the pieces of practical three-phase current data obtained in a preset period is greater than a preset first current threshold value or not; and if the judging result is positive, stopping outputting a control signal to a motor simulator. According to the method and device, the current sizes are effectively restricted, to-be-tested controllers and motor simulators are prevented from being burnt in test verification processes, and then the personal safety of testers is ensured.

The invention relates to a double-headed scalpel with protective covers. The double-headed scalpel comprises a handle, a first blade, a second blade and two protective covers, wherein the first blade and the second blade are arranged at the two ends of the handle respectively, and each protective cover comprises a pin rod, a first protective piece, a second protective piece, a first elastic piece and a second elastic piece. Pin holes are formed in the scalpel back, and the pin rods are positioned in the pin holes and are in tight contact and match with the pin holes. The inner ends of the first elastic pieces and the inner ends of the second elastic pieces are connected with the upper portions of the pin rods respectively, the upper portions of the first protective pieces and the upper portions of the second protective pieces are connected with the outer ends of the first elastic pieces and the outer ends of the second elastic pieces respectively, and the lower ends of the first protective pieces and the lower ends of the second protective pieces are provided with blunt portions facing cutting edges. By means of the two blades, demands for cutting various tissues are met, and delay of operations is avoided. The protective covers protect the cutting edges, so that the safety of the double-headed cutting edges is ensured. The blunt portions at the lower ends of the first protective pieces and the lower ends of the second protective pieces form blocking surfaces to limit the feeding depth of the scalpel, so that the operations are more accurate, patients' pain is alleviated, and the double-headed scalpel is safer and more reliable.

The present invention relates to a compact slot antenna formed, in a multilayer substrate comprising, in order, at least one first conductive layer, a first dielectric layer, a second conductive layer, a second dielectric layer and a third conductive layer, of a first slot-line (30) realised in the second conductive layer, said first slot-line being connected to the supply (A) of the antenna, of a second and a third slot-lines realised respectively in the first and in the third conductive layers, the second and third slot-lines (31, 32) each being delimited by two conductive strips of which a first extremity, supply side, is interconnected by a via passing through a window realised in the second conductive layer and a second extremity connected to the second conductive layer, both conductive strips on the side of the second extremity being, either in open circuit, or in short circuit, the electrical length of the first, second and third slot-lines being a function of the wavelength at the operating frequency of the antenna.