1473results about How to "Meet application requirements" patented technology

The invention discloses a method and a system for identifying a faked identity by preventing faked recordings based on voiceprint and voice. The method comprises the following steps: building a voiceprint model and a voice model for a user according to a voice read by the user of a fixed text with a user ID, and storing the fixed text with the user ID as well as the voiceprint model and the voice model; generating an alerting text; acquiring the voice of a to-be-identified person when the to-be-identified person reads the alerting text; identifying the acquired voice of the to-be-identified person and the stored the voiceprint model of the user, and identifying the voice of the to-be-identified person according to the stored voice model, if both the voiceprint identification and the voice identification are successfully, the identity of the to-be-identified person is accepted, and otherwise, the identity of the to-be-identified person is not accepted. According to the method provided by the invention, the method using the fixed text with the user ID and a random text are adopted, so that the required voice length for the voiceprint modeling and the voiceprint verification are greatly reduced on the premise of guaranteeing the identification performances, thereby facilitating the use of the user.

The invention provides an accurate and rapid road violation and parking full-automatic snapshot system. The system comprises a front-end monitoring point part, a network transmission part and a centermanagement unit. The vehicle detection technologies mainly comprise the vehicle dynamic detection technology and the vehicle tracking technology. A matched vehicle tracking method is estimated by utilizing the motion detection method based on time-based motion historical images and feature-point optical flows. In order to achieve a better motion detection effect, a shadow removing method is usedand a moving vehicle is more accurately detected. The multi-feature point optical flow detection tracking mode is adopted, and the tracking accuracy is obviously improved in combination with a vehicleshielding solution. The system is powerful in function and is sufficient to meet the requirements of various application occasions. By adopting the system, the functions of the remote control on a ball machine at a front end monitoring point, the previewing of the video monitoring, the automatic detection of the illegal parking, the automatic identification of license plate numbers, the association of the high-definition video recording with illegal behavior videos, the storage and the browsing of the vehicle information, the system management, the remote maintenance and the like are realized.

The invention belongs to the technical field of alloy material, and discloses a high-strength high-toughness ultrafine-grained high-entropy alloy and a preparation method thereof. The high-strength high-toughness ultrafine-grained high-entropy alloy is composed of the following elements according to the atomic percentage: 20%-25% of Ni, 18%-20% of Fe, 18%-22% of Co, 18%-20% of Cr, and 20%-24% of Al; the microstructure takes a body-centered cubic disordered solid solution phase rich in Ni and Al elements as a matrix phase, and takes a face-centered cubic disordered solid solution phase rich in Fe and Cr elements as a reinforcing phase. The preparation method of the alloy comprises the steps: elemental powders with the atomic percentages are subjected to powder mixing and high-energy ball milling to prepare an amorphous composite powder, and the amorphous composite powder is sintered to obtain the high-strength high-toughness ultrafine-grained high-entropy alloy. The prepared high-entropy alloy has the advantages of large size and good comprehensive mechanical properties, and can be used in the fields of aeronautics and astronautics, military industry, electrons, instruments and apparatuses and the like.

The present invention provides a method for evaluating compression quality of satellite-loading optical remote sensing image. The method comprises the following steps: obtaining an analog original image; obtaining the image which is decompressed after compression; respectively analyzing the dynamic range of analog original image and dynamic range of compressed image; respectively analyzing the texture detail of analog original image and texture detail of compressed image; analyzing the application effect of compression to image; analyzing the interrelationship between the analog original picture and compressed image; and evaluating the compression quality of image after synthesizing each item of analytical result to analog original image and compressed image. The invention aims at the characteristic of satellite sensor for generating analog image, adopts a comprehensive method which mainly uses objective evaluation and uses subjective evaluation in auxiliary for evaluating compression quality of image fully, systemtically and purposely. A whole system for evaluating the compression quality of satellite-loading optical remote sensing image is constructed.

A gatherer device of wireless ad-hoc network meter reading system comprises a processor unit, a 485 bus interface unit, a wireless transmitting-receiving unit, and a power supply managing unit; wherein the processor unit is responsible for operation and control of the whole device, the 485 bus interface unit is used for connecting one or multiple electric meters, the wireless transmitting-receiving unit is responsible for interacting data and commands with a concentrator of the wireless ad-hoc network meter reading system, and the power supply managing unit supplies power for the whole device. An operation method of the gatherer device comprises that a command is received by the wireless transmitting-receiving unit and transmitted to the processor unit for processing, that the processor unit sends a request frame to an electric meter, that the processor unit receives a response frame from the electric meter and analyzes the response frame to acquire information of electricity consumption, and that finally the information of electricity consumption is returned to the concentrator through the wireless transmitting-receiving unit. The device and the method in the invention solve problems that the prior micropower wireless communication meter reading manners have much channel interferences, and are relatively low in security, relatively short in communication distances and not well in penetrating capabilities. Furthermore, the device has the advantages of low cost, high cost performance, good instantaneity, safety and reliability, and use and maintenance conveniences.

The invention discloses an antistatic blocking resistant smooth linear low-density polyethylene composition based on LLDPE as base, which comprises the following parts: 0.05-0.2% opening agent, 0.05-0.3% smooth agent, 0.05-0.3% antistatic agent, 0.05-0.2% anti-oxidant and 0.05-0.2% manufacturing and heat stabilizer, wherein the opening agent contains inorganic blocking resistant agent or organic opening agent; the smooth agent is amide, soap or organic silicane; the main auxiliary anti-oxidant is hindered phenol and phosphorus anti-oxidant; the antistatic agent adopts composite pattern of non-ionic typed antistatic agent and ion-typed antistatic agent. The making method compress the following steps: adopting LLDPE as base; adding blended auxiliary material into graining stage; or graining auxiliary agent into mother grain; adding mother grain; manufacturing specific material.

The invention relates to a radome with the enhanced ultra-high molecular weight polyethylene (UHMWPE), the preparation method and the application thereof. The radome can be made of a composite material with the enhanced UHMWPE fabric and also be made of the glued joint of a surface material and a sandwich material through a cementing compound with the solidification temperature being below 130 DEG C, wherein the surface material is the composite material with the enhanced UHMWPE, and the sandwich material is the material with low density and low dielectric property. The radome not only good has mechanical property and high wave transmissivity, but also is weather resist, therefore, the radome can provide protection for a radar antenna in terrible conditions and prolong the service life thereof.

The invention provides a microwave dielectric ceramic material and a preparation method thereof, belonging to the technical field of electronic materials. The microwave dielectric ceramic material comprises the following components in percentage by mass: 25-35% of MgO, 60-68% of TiO2, 1-10% of CaO, 0-2% of SiO2, 0-2% of MnO2, 0-2% of Nb2O5 and 0-2% of CeO2; the microwave dielectric ceramic material is prepared by proportioning the MgO, TiO2, CaO, SiO2, MnO2, Nb2O5 and CeO2 according to the mass percentage of each component; performing ball milling and mixing; pre-calcining a mixture at a temperature in a range of 1050-1200 DEG C and sintering the mixture at the temperature in a range of 1250-1360 DEG C. In the invention, the microwave dielectric ceramic material is prepared by utilizing atraditional solid-phase sintering method, the process is simple and the cost is low; according to the prepared microwave dielectric ceramic material, the Q*f value is in a range of 63,000-83,000 GHz,the relative dielectric constant epsilon r is in a range of 20-22, and the temperature coefficient of resonance frequency is within +/-10 ppm/DEG C, so that the preparation requirements of a high-performance microwave device can be met.

The invention provides a face tracking method with classification and identification functions, which comprises the following steps: 1. a sequence to be matched of a current frame is F1, F2; a sequence to be matched of a front frame is F1,F2to Fj; 2. Fm of the current frame is taken out in sequence, and an LBP code pattern is calculated; 3. the obtained LBP code pattern is compared with an LBP code pattern of the front frame so that Fn which has the maximal matching degree with the Fm is found out; 4. whether a person is the same person or not is judged according to the matching degree and the central position distance relation; if so, face images of the same of the person are classified into the same type, if not, Fj+1 equal to Fm is added in the FL sequence; 5. the step 2 to the step 4 are repeated until the matching sequence of the current frame is traversed; and 6. the step 1 is back, and the next frame is processed. The invention adopts LBP characteristics with a rotary uniform mode to classify and identify the identity of a person, classifies the same person into one kind, solves the problem that information is lost after the person is sheltered in the traditional face tracking method, expands the function of a face tracking system and improves the application value thereof.

The invention relates to a fire-retardant phosphoric epoxy powder composition, which is an epoxy powder composition prepared by matching solid phosphoric epoxy resin, general solid epoxy resin, curing agent, pigment, filler, fire retardant and so on. The composition prepared does not contain halogenated and antimonic fire retardant, red phosphorus and so on, can meet the fire-retardant standard of UL94 V0, has superior electroinsulating property, and is widely applied in the electronic component packaging field. The fire-retardant phosphoric epoxy powder composition synthesizes solid phosphoric epoxy resin which is then applied to an epoxy powder system, thereby the problem that liquid phosphoric epoxy resin in the prior art can not be applied to the powder system due to the technological requirements is solved and the technical support is provided for converting the prior halogenated and antimonic fire-retardant system into non-halogenation.

The invention relates to a silicon dioxide hollow sphere/polymer composite heat insulating material and a method for preparing the same. The composite material comprises a polymer substrate and submicron, agglomeration-free and monodisperse silicon dioxide hollow spheres evenly dispersed in the substrate, wherein the polymer substrate is a substrate of epoxy, polyurethane or polyethylene terephthalate; and for the submicron silicon dioxide hollow spheres, the hollow internal diameter is between 100 and 720nm, the thickness of the outer wall is between 50 and 100nm, and the weight of the submicron silicon dioxide hollow spheres is 1 to 35 percent of that of the polymer substrate. In the method, powder of the submicron, agglomeration-free and monodisperse silicon dioxide hollow sphere is prepared first; the powder is modified by the surface modifying technology; and finally, the modified powder is combined with the polymer taken as the substrate. The composite heat insulating material shows excellent heat insulating property, and the heat insulating property shows size-dependent characteristics in a rang of submicron. Moreover, because an organic foaming agent is not used in the preparation process, the composite heat insulating material is environment-friendly.

The invention discloses a cutter changing-manipulator for a disc-shaped hobbing cutter of a shield machine and a using method thereof. The manipulator comprises a box body. Hydraulic cylinder supporting seats are arranged on the upper and lower end faces of the box body. Manipulator finger supporting seats are arranged at the front end of the box body. Manipulator fingers are hinged to the manipulator finger supporting seats in a longitudinal symmetry mode. One ends of hydraulic cylinders are hinged to the hydraulic cylinder supporting seats, and the other ends of the hydraulic cylinders are hinged to the manipulator fingers. Through holes are formed in a front box plate and a rear box plate of the box body. A disc-shaped hobbing cutter disassembling and assembling block is inserted in the through holes and penetrates through the box body. Each pair of manipulator fingers are driven through a corresponding hydraulic cylinder, so that good synchronicity of the manipulator fingers is guaranteed; the manipulator fingers are simple in structure, easy to machine and high in practicability; the box body is designed as an I shape and has the good mechanical property, and meanwhile enough moving space is reserved for the hydraulic cylinders driving the manipulator fingers; and the disc-shaped hobbing cutter disassembling and assembling block has stretching and retracting functions, is provided with a rotating mechanism, can automatically adjust and align when positioning precision is not high and is suitable for a wider manipulator precision interval.

The invention relates to an electrical equipment operation condition classification method, which comprises the steps of building training data of a mean clustering model; pre-processing the training data, deleting invalid data and carrying out normalization processing; adopting a K-means++ algorithm for determining an initial clustering center; determining upper and lower limitations of clustering classification categories; circularly realizing a clustering process of multiple categories; carrying out evaluation analysis on a clustering result, and determining an optimal clustering category number K value; selecting an optimal K value model as an optimal condition classification result, so that the efficiency and the accuracy are improved.

A halogen-free flame retardant polyurethane sealant and a preparation method thereof belonging to the technical field of sealant. The method is as below: first of all, preparing a polyurethane prepolymer; stirring and mixing the polyurethane prepolymer with a halogen-free flame retardant, a flame retardant synergistic agent, a carbon forming agent, a filler, a thixotropic agent, an ultraviolet absorbent, an antioxidant, a toner and a plasticizer under low vacuum condition less than 2 kPa at 35-60 DEG C in a double planetary mixer with high speed dispersing head or a three-roller grinding machine for 0.5-2 h; and then adding a water-removal agent and a catalyst A under the protection of nitrogen, mixing and dispersing for 0.1-0.5 h, and then mixing and dispersing under the condition with vacuum degree less than 2 KPa for 0.1-1 h to obtain the halogen-free flame retardant sealant. The invention inhibits the shortcomings of heavy smoke during burning, difficulty in self-extinguishing and severe droplet of the product.

The invention discloses a bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material comprises a matrix with the chemical formula of xBiScO3-(1-x)PbTiO3 and bismuth trioxide (Bi2O3) in an amount which is less than 0.4 percent of the total weight of the matrix. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material is prepared by adding excess Bi2O3 into raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3, wherein x is 0.35 to 0.38; and the using amount of the excess Bi2O3 is 0.1 to 0.4 percent of the total weight of the raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material solves the problems that ceramic sintering temperature is increased and piezoelectric and dielectric properties are reduced due to deviation of a stoichiometric ratio caused by bismuth volatilization in the sintering process of BSPT ceramic, and has high Curie temperature, excellent piezoelectric property and an actual application value in high-temperature electronic equipment. The invention also discloses a preparation method for the bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. In the preparation method, the piezoelectric ceramic material is prepared by synthesizing and sintering at lower temperature, so production cost is reduced, process steps are simplified, and the material has actual application value.

The invention discloses a titanium silicalite molecular sieve catalyst, which comprises 40 to 65 mass percent of titanium silicalite molecular sieve with a melt flow index (MFI) topological structure and 35 to 60 mass percent of aluminum oxide, wherein the aluminum oxide is made from aluminum hydroxide powder and aluminasol, and the side pressure breaking strength is 70 to 150N/cm. The catalyst is prepared by mixing the titanium silicalite molecular sieve with the MFI topological structure, aluminum hydroxide powder, aluminasol, a pore-forming agent, an extrusion assistant and water, kneading to obtain a formable plastomer, extruding the formable material in a strip extruder to form wet strip formed bodies, and drying and roasting the extruded strip formed bodies, wherein the total mass of the pore-forming agent and the extrusion assistant is 15 to 75 percent based on the mass of the titanium silicalite molecular sieve powder; and based on aluminum oxide, the mass ratio of the aluminum hydroxide powder to the aluminasol is (1-3):1. The catalyst is particularly suitable for catalyzing the epoxidation of 3-chloropropene and hydrogen peroxide for preparing epoxy chloropropane in a fixed bed reactor.

The invention discloses an enhancement signal multiplexing technique of a multiple-input multiple-output system based on compressive sensing. On the basis of the existing MIMO technique and the existing related signal multiplexing technique of the MIMO system, a random measuring matrix in a compressive sensing technique is taken as a signal compressive multiplexing matrix; the sparse characteristic of the sending signals displayed on an overcomplete redundant dictionary is fully utilized; through adoption of a compressive sensing reconstruction algorithm, high-dimensional sending signals are solved from low-dimensional received multiplexing signals; therefore, the signal multiplexing gain is greatly improved under a condition that the number of the transceiving antennas of the MIMO system is stated; the application demand of the MIMO system for broadband transmission is satisfied well; and the technique provided by the invention has the advantages that a receiving end reconstructs multi-way data streams at a high probability through a mature optimum reconstruction algorithm in the compressive sensing field and the modification of the existing MIMO system is little, wherein the multi-way data streams are sent by a sending end through a compressive multiplexing step.

The invention relates to a Co bogie for a heavy-load alternating-current transmission power freight locomotive on a railway, in particular to a Co bogie for a high-adherence heavy-load freight locomotive, comprising wheel pair driving systems, a framework, a two-series suspension device, a traction device, a motor suspension device and a braking device. Three wheel pair driving systems are installed on each bogie and adopt integrated axial suspension drives with flexible axle couplers and alternating-current traction motors; gear boxes are in load bearing structures; a first-axle wheel pair axle box device and a third-axle wheel pair axle box device are provided with integrated conical bearings with small axial clearances, and a second-axle wheel pair axle box device is provided with an integrated cylindrical bearing with a large axial clearance. The bogie structure provided in the invention can satisfy the adoption requirements of 25-ton axle-load electric locomotives.

The invention discloses two-dimensional image force touch reproducing control method and system based on a three-dimensional force sensor. The method is characterized by comprising the following steps of: fixing a three-dimensional force sensor on a handle at the end part of force touch interacting equipment; collecting image contact force output by the force touch interacting equipment in real time; and meanwhile, carrying out closed-loop control on a collected image contact force signal and adjusting the output of the image contact force signal in real time by adopting a proportion control algorithm. The invention adopts a closed-loop feedback control policy, improves the output precision of image contact force and the stability of a control system and reinforces authenticity during man-machine interaction; and in addition, a modularized system structure is adopted by the invention, therefore, the system portability is high.

The invention relates to a clustering-wireless-sensor-network-orientated two-stage adaptive frequency-hopping method. The method comprises the following steps of: constructing the clustering wireless sensor network; defining a super-frame structure based on institute of electrical and electronic engineer (IEEE) 802.15.4 according to the topological structure of the clustering wireless sensor network; accessing a format of a beacon frame of a control layer based on a medium of the original IEEE 802.15.4, and extending a content of a beacon frame load; and accessing the beacon frame of the control layer based on the super-frame structure and the extended medium of the IEEE 802.15.4 so as to realize a two-stage adaptive frequency-hopping process of a node in the network. By the clustering wireless sensor network, the network size is expanded, the difficulty in maintenance and management is lowered, and the system flexibility is improved; as the two-stage frequency-hopping method is designed, the compatibility with the IEEE 802.15.4 and the system reliability are guaranteed; and based on the beacon frame load of the IEEE 802.15.4, no special frame is not needed to be designed for a broadcast channel distribution result during a channel switching process, so that the network design is simplified, the number of the frames for controlling is reduced, and the network throughput is increased.

The invention discloses a halogen-free flame retardant polycarbonate/thermoplastic polyester resin composition, whose components and proportions are as follow: polycarbonate 50 percent to 85 percent, thermoplastic polyethylene terephthalate resin 5 percent to 30 percent, core-shell graft coplolymer 2 percent to 15 percent, phosphorus-containing flame retardant 5 percent to 15 percent, super fine talc powder 0 to 20 percent and phosphite antioxidant 0 to 0.05 percent, the above contents are all in weight percentage. The product of the invention has the advantages that no large amount of harmful gas is released when the product is burned with environmental protection and safety.

This invention publishes a plug-anlage complex medical fibre. Choose healthy animals, after butcher, decorticate, wash and degrease the peltry. Then, hydrolyze and purify it by using the complex enzym-skin glue disposer and chemical substance. Let it receive animal skin glue with good biology consistence and biology activity. Hydrolyzed animal skin glue can gain glue anlage complex medical fibre filature original liquid when mixed with shell-polysacharide after ulteriorly purification. The original liquid can be used to make biology medical velum, operation medical suture and glue-anlage complex medical fibre original liquid.