72results about How to "Overcome inherent shortcomings" patented technology

The invention discloses a novel laser confocal microscopic endoscope with high resolution, a telescopic image transmission system is used for replacing optical fiber bundles or a single optical fiber, the laser is coupled into a tissue in vivo, a reflected light or a fluorescent signal is coupled into a detector in vitro, a fluorescent image with high resolution and contrast is obtained, meanwhile an endoscope probe diameter is reduced; a confocal scanning mechanism is arranged in vitro, the high performance confocal scanning is obtained, meanwhile the dimension of the endoscope probe can not be increased, and the confocal scanning mechanism is compatible with an existing hard tube endoscope, thereby implementing the high-performance histopathology diagnosis in vivo.

The invention provides a magnetic plasma thrustor supported through lasers. The magnetic plasma comprises a thrustor power source for supplying power to all electric equipment in the thrustor; satellite platform electric energy is converted through the thrustor power source to be then supplied to the thrustor; the magnetic plasma thrustor further comprises a working medium supply device, a negative pole, a positive pole and a laser generation mechanism, a discharge channel is formed between the negative pole and the positive pole, the working medium feeding device used for fixing and conveying a working medium is arranged outside the discharge channel, and the working medium is a solid working medium and extends into the discharge channel; and the laser generation mechanism emits laser beams into the discharge channel to conduct ablation on the working medium, the laser beams conduct ablation on the working medium continuously to generate partial ionized gas and particulate matter, and the partial ionized gas and the particulate matter enter the discharge channel. The magnetic plasma thrustor solves the problems that an air supply system is complex, dynamic response is slow, negative pole ablation is serious, and performance reduction is caused by large-current vibration, and the magnetic plasma thrustor which is supported through the lasers and is high in dynamic response, high in working medium using rate and high in energy conversion efficiency is provided for a spacecraft.

The invention is used for satisfying the management needs from in-system departments except the facility management department. It comprises: a database used for saving device information and device management information; a data access module used for executing the access to database; a service logical module used for executing the service logical and calling said data access module to access the database; and a client side used for sending the request to the service logical module.

The invention discloses an active filter and a method for eliminating the secondary resonance of a train DC bus bar. The active filter comprises a bi-directional DC/DC converter with a step-up and step-down voltage function, a filter inductor and an energy storage capacitor. According to the principle of power balance, when the secondary ripple of bus voltage is fully compensated, the secondary ripple power of single-phase rectifier should be controlled equal to the secondary ripple power compensated by active power filter, and the direction is opposite. According to the voltage, current and other electrical quantities detected by the actual system, the closed-loop control is carried out, which ensures the compensation effect and the dynamic response ability of the system when the train isrunning, and improves the stability of the system. It can replace the traditional passive LC filter, can overcome the shortcoming that the passive filter can only compensate the harmonics of fixed frequency, can adapt to the complex power network environment, and the effect is more ideal than the traditional method. The device can reduce the volume and weight of the traction drive system, reducethe cost and increase the power density of the converter.

The method comprises: in the first, judging the location of user; if it is in center of cell, the used subcarrier is in the range of start-stop and there are available frequency resources at outside of the range, then adjusting the subcarrier of the user to the outside of the range of start-stop; if the user is at the edge of cell, the used subcarrier is at the outside of the range of start-stop, and there are available frequency resources in the range of start-stop of subcarrier, the subcarrier of user is adjusted to the inside of the range of start-stop, by which making user data transmission; if there are not resources in the range of start-stop of subcarrier, the user can use a subcarrier identical or partly identical with another user to transmit user data.

The invention provides an X-ray source for medical testing and a mobile CT (computer tomography) scanner. The X-ray source for medical testing comprises an X-ray tube and a high voltage generator, wherein the X-ray tube comprises an anode, a cold cathode, a grid and a tube shell; the tube shell is used for supporting the anode, the cold cathode and the grid, and enabling a vacuum working environment of the anode, the cold cathode and the grid to be insulated from the outside world, and the anode is grounded; and the high voltage generator is used for providing a first electric field between the cold cathode and the grid so as to enable the cold cathode to emit electrons in a field mode, and providing a second electric field between the grid and the anode so as to accelerate the electrons emitted by the cold cathode, thereby enabling the electrons to bombard X-rays generated by the anode. The X-ray source provided by the invention can realize high-frequency pulse transmission of electron beams easily, and is high in response speed, long in service life and high in security, that is, the overall performance of the X-ray source is improved, thereby being better meeting practical application requirements such as medical testing and the like.

This is a new fiber and grating steel tube sealed temperature sensor and belongs to the sensor technique field. This invention adopts double layer steel tube structure and fiber grating sealed with 703 glue and epoxide resin. The double steel structure effectively improves sensor heat-sensitive coefficients. The epoxide resin glue fixes light fiber and isolates the light fiber axial strains and the 703 glue covered light fiber area or 1.5mm steel tube wall can not only isolate the epoxide resin to avoid the multiple peak values but also reduces the outer strains interference. The new temperature sensor can widely used in the temperature measurement in the civil engineering, petrochemical industry and nuclear industry.

The invention provides a vehicle license plate Chinese character recognition method based on multi-feature fusion. The vehicle license plate Chinese character recognition method comprises the following steps: unifying images to be detected; improving HOG features to obtain Chinese character edge features of the to-be-detected images; obtaining Chinese character gray features of the to-be-detected images; obtaining Chinese character textural features of the images to be detected based on LBP feature theory; fusing the Chinese character edge features, the gray features and the textural features of the images to be detected to obtain fusion feature vectors of the to-be-detected images; forecasting a classification result based on an SVM classifier. The vehicle license plate Chinese character recognition method comprehensively uses global features and local features of the Chinese characters, can be used for identifying more accurately, and has high robustness on low-quality images and high-interference images.

The invention discloses a gas-solid centrifugal separation and exhaust integrated machine, comprising a rotator system and a stator system, wherein the rotator system rotates in the stator system to achieve gas-solid centrifugal separation and discharge the separated gas and solid particles at the same time; and the stator system comprises centrifugal fan impellers (3), a rotary gas-solid separation chamber assembly (4), an isolation cylinder (5), a central exhaust pipe (6), an anti-swirl hood (7), a rotary dust storage chamber, a dust discharge assembly (9) and a spindle (11). The integrated machine is a two-in-one device capable of automatically absorbing dust-containing gas, continuously separating the carried solid particles from the gas, automatically removing the solid particles and automatically discharging the gas at the same time. The integrated machine can improve the separative efficiency of ultrafine particles, can be applied in an occasion with the high temperature about 400 DEG C, and can reduce the occupied area.

The invention relates to the field of new material preparation, and provides a pressure-assisted induction heating vacuum atmosphere flash sintering device. The pressure-assisted induction heating vacuum atmosphere flash sintering device comprises a furnace body, a pressure system, a flash sintering system, an induction heating system, a cooling system and a vacuum system. The pressure system comprises an upper pressing head and a movable lower pressing head. An upper electrode and a lower electrode are arranged on the end portions of the upper pressing head and the lower pressing head correspondingly and provide pressure for flash sintering samples. The flash sintering system provides a flash sintering circuit. The induction heating system provides heating and heat preservation. The furnace body is cooled by the cooling system. The furnace body is vacuumized by the vacuum system. The inherent defects in a traditional flash sintering technology are overcome, flash sintering power sources can be flexibly selected according to the electrical properties of materials obtained after flash sintering to cause thermal runaway, thus, the density level and microstructures of the samples arefinely adjusted and controlled to the maximum degree, and the device has universality for metal and ceramic materials; and pressure assisting of the flash sintering process can be easily achieved, andnew preparation means can be provided for the research field.

The invention relates to a high-efficiency broad spectrum flocculant, which is mainly prepared by the following compositions in weight percentage: 40 to 50 percent of cationic polyacrylamide, 0.8 to 1.2 percent of OP-10 emulsifier, 8 to 13 percent of polysilicic aluminum iron sulfate, 0.8 to 1.2 percent of sodium hydroxide and 35 to 48 percent of vaal water. The preparation method for the high-efficiency broad spectrum flocculant is as follows: the cationic polyacrylamide, the polysilicic aluminum iron sulfate, the OP-10 emulsifier and the vaal water are added into a reaction kettle of a vacuum dispersion machine and stirred for 15 to 20 minutes; and the sodium hydroxide is added into an emulsifiable solution and continuously stirred for 20 to 30 minutes. The high-efficiency broad spectrum flocculant simultaneously has the advantages of an inorganic flocculant and an organic flocculant and simultaneously overcomes the inherent defects of the inorganic flocculant and the organic flocculant. The high-efficiency broad spectrum flocculant has wide application scope, has good water purifying effect on water quality with various concentrations, nonferrous wastewater and a plurality of kinds of industrial wastewater, and can be widely used for purification treatment of industrial waste water in the printing and dyeing, paper-making, chemical industry and so on.

The invention relates to a mode group diversity multiplexing (MGDA) multimode optical fiber communication system and a channel demultiplexing method based on independent component analysis (ICA). The system comprises a signal generating module, a mode group multiplexing module, a mode group transmitting module, a mode group detecting module and a signal processing module. Data acquisition is carried out on the detected multiplex mixed signals by the signal processing module, thus obtaining a mixed signal matrix xn*T, then processing is carried out by applying the channel demultiplexing method based on the independent component analysis (ICA) and adopting a symmetrical orthogonalization FstICA algorithm based on negative entropy, then signs and orders of separated signals are identified according to an identification principle, thus ensuring the obtained separated signals and source signals to be accordant. The system and the method solve an inherent defect of blind signal separating technology, namely, uncertainty of the signal orders and signs. The system and method enhance the applicability of the symmetrical orthogonalization FstICA algorithm based on the negative entropy.

The invention discloses a gear-rack-crankshaft linkage engine conversion mechanism. According to the gear-rack-crankshaft linkage engine conversion mechanism, a rack journal 103 of a crankshaft 1 in a crankshaft shell 3 is hinged to one end portion of a main rack 2; a main tooth row 201 of the main rack 2 is engaged with a main gear 401 of a transmission shaft 4; a limiting mechanism 42 is arranged between the main rack 2 and the main gear 4; multiple gears 402 of the transmission shaft 4 in a transmission cylinder 9 are engaged with rack connecting rods 5; limiting mechanisms 59 are arranged between the gears 402 and the rack connecting rods 5; on end portion or two end portions of each rack connecting rod 5 is/are connected with one end portion of an additional connecting rod 502; all the additional connecting rods 5-2 are hinged to pistons 7 in the air cylinders 801; and the total acting force on the pistons 7 is transmitted to the main tooth row 201 through the rack connecting rods 5, the gears 402 and the main gear 401 and drives the rack journal 103 of the crankshaft 1 to do the circular movement, and an engine set of the multiple air cylinders 801 is formed.

The invention discloses an acidic electrolytic zinc plating solution additive and an application method thereof. The additive is composed of the following components in percentage by weight: 10 to 90% of long chain alkyl benzene sulfonate or/and heterocyclic organic amine and 10 to 90% of water or/and ethanol. The additive can improve the lightness and flatness of zinc coating, and enables the zinc coating to have a very good dispersing performance and covering performance. By adding the additive in an acidic plating solution, zinc coating with a high surface performance can be obtained in a wide temperature range and a wide current density range, the uniform electroplating performance of the electroplate technology can be improved, and at the same time the corrosion of acidic plating solution on electrolytic zinc equipment is reduced. The additive has the advantages of little using amount, high efficiency, no toxic or odor, complete dissolution in water, and wide application range. The application method of the additive is very simple. 50 to 1000 ppm of additive can be directly added into an acidic electrolytic zinc plating solution to carry out zinc electroplating so as to obtain electrolytic zinc coating having the advantages of good surface performance, little internal stress in the coating, and high corrosion resistance, and the processing time is very short.

The invention relates to a bidirectional dynamic voltage adjusting device. The bidirectional dynamic voltage adjusting device comprises an adjusting main circuit and a DSP control circuit, and the adjusting main circuit is connected between a power grid and a load. The bidirectional dynamic voltage adjusting device comprises a first PWM converter, which is used for inflow outflow control of power grid energy; a second PWM converter, which is parallely connected with the first PWM converter by an energy storage capacitor, and is used to realize inflow outflow control of load energy under control of a DSP control circuit; a serial connection compensation transformer; a sinusoidal wave filter, which is serially connected between the serial connection compensation transformer and the load, and is used to realize filtering of high frequency pulses. The primary side of the serial connection compensation transformer is connected with the first PWM converter, and the secondary side of the serial connection compensation transformer is directly serially connected with the power grid, and voltage drop and isolation are realized, and therefore the forward compensation or the backward compensation of the load voltage is realized under the control of the DSP control circuit. Compared with the prior art, advantages of a conventional mechanical type on-load voltage regulation transformer and a contactless thyristor on-load voltage regulation device are provided, and the inherent disadvantages thereof are overcome, and good performance is provided.

The invention discloses a three-channel water surface composite yacht which comprises a main yacht body. Side bodies are arranged on the two sides of the bottom of the main yacht body respectively. Two middle yacht bodies are arranged between the two side bodies. Three channels are formed between the two side bodies and the two middle yacht bodies. Hydrofoil systems are arranged at the front ends or the rear ends of the three channels. Each hydrofoil system comprises a hydrofoil, a rotating rod and a control device, wherein the rotating rod penetrates through the hydrofoil, the rotating rod drives the hydrofoil to rotate, the control device is installed on the corresponding middle yacht body and connected with the hydrofoil through the rotating rod, and the hydrofoil is driven by the control device to rotate. According to the three-channel water surface composite yacht, through the combination of the good layout characteristic, good resistance performance and high shipping-direction stability of a three-channel skimming yacht and the rapidness and good comprehensive navigation performance of a hydrofoil yacht with controllable hydrofoils, the inherent defects of the three-channel skimming yacht and the hydrofoil yacht are well overcome.

The invention relates to a chemical new drug of the medical technical field, in particular to a glucosamine unsaturated fatty salt and a relative application for preparing the drug of nerve immune endocrine disease. The preparation method comprises using glucosamine hydrochlorate as raw material, adding unsaturated fatty acid, emulsifying, depositing, filtering and drying to obtain glucosamine oleate, glucosamine linoleate and glucosamine linolenate to prepare the tablet with an effective component of 0.1g as the drug of nerve immune endocrine disease for I and II levels of Graves'disease exophthalmos patient with dropsy appearance and III and IV levels of Graves'disease exophthalmos patient and psychology physiologic sleep disorder patient, with the function of human internal biological signal molecule and high effect.

The invention discloses a square-prism-reinforced pipe pile, which at least comprises a square pile body. A prismatic outer surface is arranged on the outer surface at each side of the square pile body, and a reinforcing rib is also arranged on the outer surface of the square pile body. Furthermore, the invention discloses a machining method of the square-prism-reinforced pipe pile. Due to the structural designs of the prismatic outer surface and the reinforcing rib, the square-prism-reinforced pipe pile provided by the invention is improved in outer surface shape, increased in friction coefficient of the outer surface and enhanced in pile-side friction force. Simultaneously, due to the structural designs of the prismatic outer surface and the reinforcing rib, the square-prism-reinforced pipe pile is also increased in end area and improved in pile-end bearing capacity. Therefore, the square-prism-reinforced pipe pile provided by the invention has the advantages of a round pile and a square pile, simultaneously also overcomes the respective inherent disadvantages of the round pile and the square pile and is higher in pressure-resistant friction force, higher in shear performance, higher in pullout resistance, and obvious in improvement and beneficial effect.