634results about How to "Meet performance needs" patented technology

A double-frequency coupled antenna with a metal frame comprises the metal frame, a printed circuit board (PCB) arranged in the metal frame, and an antenna unit, wherein the metal frame comprises a closed loop metal frame formed by a first frame, a second frame, a third frame and a fourth frame, the PCB comprises a circuit area and a clearance area, the antenna unit comprises a feed line and a coupling line, the feed line is connected with a feed source, the coupling line is electrically connected with the fourth metal frame, and two ends of the fourth frame are connected with a ground of the PCB to form a closed-loop radiation loop. According to the double-frequency coupled antenna with the metal frame, the metal frame is designed as a part of an antenna irradiator, and projection areas of the PCB of the antenna are reduced; the metal frame does not need slotting, by means of a coupled feeding manner, current of the antenna in the whole radiation loop can be more evenly distributed, and the problem that finger touch affects properties of the antenna of mobile terminals is solved; by means of a slotting manner, the requirement of the antenna for PCB clearance environments is reduced, and thus, the antenna is applicable to more complicated mobile phone environments.

The invention discloses an acrylate solvent-based pressure sensitive adhersive. The acrylate solvent-based pressure sensitive adhersive comprises, by weight, 100 parts of a tackifying resin modified acrylate prepolymer, 0.5-3 parts of a catalyst and 0.1-2 parts of a cross linking agent. The invention further discloses adhesive products prepared from the acrylate solvent-based pressure sensitive adhersive. The acrylate solvent-based pressure sensitive adhersive is characterized by: adopting the tackifying resin modified acrylate prepolymer as a main component, adding proper catalyst and proper cross linking agent according to different use requirements before being coated to adjust performance of the adhersive so as to satisfy performance requirements of a plurality of products, optimize product structures, raise production efficiency and facilitate product development and product transformation.

The invention provides an anisotropic polyimide aerogel material and a polyimide / inorganic nanoparticle composite aerogel material as well as preparation methods thereof. The anisotropic polyimide aerogel material and the polyimide / inorganic nanoparticle composite aerogel material are prepared with a freezing method, a freezing solution is used for freezing, the freezing direction is controlled, and the prepared aerogel material has anisotropy and has wide application prospects in low dielectric materials, matter adsorption, matter separation, thermal insulation protection, acoustic damping, catalysts, drug carriers and other fields.

The implementation mode of the invention provides a time and frequency synchronization method in a wireless communication system, which comprises the steps of carrying out the symbol timing estimation and the fine frequency estimation on received signals based on the Orthogonal Frequency Division Multiplexing (OFDM) technique; carrying out the timing estimation on the Packet Switching Service (PSS) through the matched filtering of the received signals; determining at least two continuous OFDM symbols as candidate OFDM symbols containing the PSS; shifting the candidate OFDM symbols compensated by the fine frequency estimation into a frequency domain; carrying out the cyclic shift channel estimation on the corresponding sub-carriers of each candidate OFDM symbol of the at least two candidate OFDM symbols; shifting the cyclic shift channel estimation result of each candidate OFDM symbol into a time domain; figuring out the energy value of each sampling point according to the time-domain channel impulse response of each integer-frequency-offset value; and determining the OFDM signals containing the PSS and the calculated value of the integer-frequency-offset value based on the energy maximum principle.

The invention discloses a smart grid information transmission safety protection device and a safety protection method, which relate to the technical field of smart grid information transmission safety. The device comprises a certificate server, an encryption and decryption module, a compliance check module and an exception handling module, wherein the encryption and decryption module is wholly serially connected between a station level and a bay level for carrying out encryption signature and signature verification decryption functions on original transparently-transmitted data; the compliance check module grabs a plaintext data packet in an offline or online mode and submits the plaintext data packet to the detection module for compliance check, and as for a compliance message, an analysis result is stored to a log database in a log format; and exception information is independently stored in an exception database through the exception handling module, and an administrator is notified. In the case of permissible delay in the smart grid, the encryption and decryption module together protects the internal information of the smart grid, behaviors that the internal data are tampered and destructed in the case of transmission are resisted, and the safety of the grid is further improved.

The invention provides a large-scale chart-shaped data processing task scheduling method for resource cost driving under cloud computing environment and belongs to the field of distributed computing. The method comprises the following steps of: 1, reading in a large-scale chart-shaped data processing task chart, traversing the large-scale chart-shaped data processing task chart according to hierarchical relationship of chart-shaped structure tasks, performing task serial number marking according to hierarchy and computing the total number n of the tasks; 2, reading in the performance and valuation mode of a virtual machine under the current cloud computing environment; 3, initializing codes of m particles as well as the positions Xi and flying speeds Vi of the particles, and setting the maximal number of iterations as T; 4, computing fitness functional values f(Xi) of all the particles by utilizing a lower fitness function according to the current codes of the particles; and 5, performing speed updating and position updating according to the fitness functional values of the particles.

The invention provides a method and a device for realizing multi-core parallel at a TEE side, a computer system and the like. The method comprises the following steps: a TEE creates a plurality of sub-threads, wherein the sub-threads are used for realizing sub-functions of a TA deployed at a TEE side; for each sub-thread, the TEE triggers a rich execution environment (REE) to generate a shadow thread corresponding to the sub-thread, and the operation of the shadow thread promotes a core running the shadow thread to enter the TEE; and the TEE schedules the created sub-thread to the core where the corresponding shadow thread is located for execution. By utilizing the method, a plurality of service logics in the service with high performance requirements can be operated in parallel in the TEE, and the TEE triggers the REE to generate the thread and automatically enters the TEE side, so that active kernel adding at the TEE side is realized, and the parallel flexibility of the TEE side is improved.

The invention relates to a matrix inverse operation method. The method comprises the steps of 1, conducting column pivoting LU decomposition, wherein a source matrix A is decomposed into a unit lower triangular matrix L, an upper triangular matrix U and a permutation matrix P according to the formula PA=LU; 2, conducting triangular matrix inversion, wherein the inverse matrix L-1 of the matrix L is obtained through matrix inversion, and matrix inversion is conducted on the transposed matrix of the matrix U and then transposition is conducted to obtain U-1; 3, finally conducting matrix multiplication, wherein the matrix U-1 and the matrix L-1 are multiplied, and column transformation is conducted on the matrix multiplication result according to the permutation matrix P to obtain a source matrix A-1. The method has the advantages that by using the column pivoting LU decomposition algorithm, the time complexity of the matrix inversion algorithm is effectively reduced, parallelizability of matrix inversion operation is improved, time for matrix inversion operation is shortened, matrix inversion operation of any order can be conducted, and the number of hardware resources can be increased or reduced according to count requirements of operation so that practical application requirements can be better met.

The invention relates to a self-adaption MDOF (Multi-Degree Of Freedom) humanoid manipulator based on pneumatic artificial muscle and aims at providing a manipulator which has certain functions of human hands and also has the characteristics of practicability, smoothness, safety, small size, lightness, easiness in control and simple mechanism. According to the technical scheme, the self-adaption MDOF humanoid manipulator based on the pneumatic artificial muscle comprises an air course control system, a manipulator mechanism and an artificial muscle system, wherein the manipulator mechanism comprises a mechanical big arm, a mechanical forearm, a hand and five fingers; the artificial muscle system comprises a plurality of third pneumatic artificial muscles, a plurality of fourth pneumatic artificial muscles, a plurality of first pneumatic artificial muscles, a plurality of fifth pneumatic artificial muscles and a plurality of second pneumatic artificial muscles; the mechanism big arm is driven by the third pneumatic artificial muscles and the fourth pneumatic artificial muscles; the mechanism forearm is driven by the first pneumatic artificial muscles; a wrist joint is driven by the fifth pneumatic artificial muscles; the five fingers are driven by the second pneumatic artificial muscles.

The invention provides a high-altitude, low-speed and high-lift natural laminar flow airfoil. The maximum thickness of the airfoil is 14%C, the maximum thickness location is 36%C, the thickness of a trailing edge is 0.425%C, the maximum camber is 5.1%C, and the maximum camber location is 47%C, wherein C is the chord length of the airfoil. The airfoil firstly turns and then separates under the conditions of low speed and 1 million magnitude Reynolds numbers, laminar flow separation bubbles are not formed, and the natural laminar flow airfoil has a higher design lift coefficient and a larger lift-drag ratio, has mild stalling characteristics and good torque characteristics and can meet the performance demands of a high-altitude long-endurance unmanned aerial vehicle.

The invention discloses a high-gloss scratch-resistant and antistatic ABS (acrylonitrile-butadiene-styrene) alloy. The alloy comprises the following components in percentage by weight: 15%-60% of ABS resin, 20%-60% of polyacrylic resin, 3%-10% of scratch-resistant additives, 0.5%-3% of compatilizer, 3%-10% of toughener, 2%-10% of antistatic agent, 0.5%-1% of stabilizer and 0.5%-2% of processing agent, wherein the sum of the weight percentages of all the components is 100%. Compared with the prior art, the ABS alloy provided by the invention not only has high-gloss, but also has good scratch-resistant property, antistatic property and mechanical property, can meet the requirements of the existing market for the performance of household appliance shell and has broad application prospect; and the preparation process of the ABS alloy is simple and is easy to operate.

The invention discloses an inter-core communication method based on an FPGA multi-core system. The multi-core system comprises at least three soft cores which are loaded on a shared buffer of the FPGA and share all the peripheral resources; the inter-core communication comprises data interaction and command interaction between cores; during the data interaction, the adjacent soft cores are subjected to inter-core interaction in a fast point-to-point bus connection manner, and the nonadjacent soft cores are subjected to the inter-core interaction in shared buffer, e-mail and mutex manners; during the command interaction, the adjacent soft cores are subjected to the inter-core interaction in a manner of fast point-to-point bus connection in combination with interrupt, and the nonadjacent softcores are subjected to the inter-core interaction in a manner of shared buffer, e-mail and mutex in combination with interrupt. The inter-core communication method based on the FPGA multi-core system can be used for strictly classifying the inter-core communication according to different physical locations between the soft cores, the on-chip resources of the FPGA are saved to the largest extent, and the operating efficiency of the entire system is increased.

The invention discloses a modified building residue baking-free brick. The modified building residue baking-free brick is prepared from, by mass, 65 to 75% of building residue, 10 to 15% of sand, 5 to 15% of cement, and 2 to 5% of industrial lime. The modified building residue baking-free brick is prepared via following steps: 1) building residue generated in subway construction processes is subjected to simple ball milling so as to obtain building residue powder; 2) the ingredients above are weighed according to the ratio above, and water-solid ratio is controlled to be 0.20 to 0.24; 3) cement, lime, gypsum, and sand are uniformly mixed with the building residue powder, water is added for uniform mixing, an obtained mixed material is subjected to extrusion forming, and curing under natural conditions for 3 to 7 days, is delivered into a drying oven, and is dried to be constant in weight at 40 to 60 DEG C so as to obtain the modified building residue baking-free brick. The modified building residue baking-free brick is cheap; a large amount of building residue can be recycled; environmental pollution and soil waste are reduced; compressive strength is high; water resistance is excellent; the modified building residue baking-free brick is capable of satisfying performance requirements of building bricks, and can be used for replacing sintering clay bricks.

The invention discloses a manufacturing method of a vermicular cast iron piston ring. The material of the vermicular cast iron piston ring comprises the following chemical components in percentage by weight: 3.4-4.0% of C, 2.4-3.2% of Si, not more than 0.3% of Mn, 0.2-0.4% of Cr, 0.2-0.6% of Mo, 0.5-1.0% of Cu, 0.05-0.15% of Ti, not more than 0.1% of P, not more than 0.05% of S, 0.009-0.02% of Mg and the balance of Fe and inevitable impurities. The manufacturing method of the vermicular cast iron piston ring comprises the following technical steps of moulding, smelting, casting, shaking out, shot blasting, mechanical processing, surface treatment and the like. By adopting the manufacturing method disclosed by the invention, the thinning of the piston ring is achieved, the production process is relatively simple, and the manufactured vermicular cast iron piston ring is high in elasticity, strength, toughness and wear resistance.

The invention relates to a revolving stage, in particular to a revolving stage with magnetic-coded-connection guard bars. The revolving stage comprises a stage top, a hollow fixing column, a hollow lifting column arranged at the upper end of the hollow fixing column in a sleeving mode, a lifting structure for driving the hollow lifting column to be lifted, a slewing bearing arranged at the upper end of the hollow lifting column and a rotating motor for driving the slewing bearing to rotate. The guard bars are arranged on the stage top and comprise supporting rods connected to the stage top in the mode of being capable of being pulled and inserted, and the supporting rods and the stage top are locked together through magnetic coded locks. Each magnetic coded lock comprises a plurality of coded units distributed in the up-and-down direction. Each coded unit comprises a lock hole formed in the corresponding supporting rod, a spring bolt arranged on the stage top, a locking spring for driving the spring bolt to be inserted into the lock hole and a key hole. Each spring bolt comprises a spring bolt body made of non-magnetic materials and a magnet arranged on the spring bolt body, and the N poles and the S poles of the magnets are distributed in the distribution directions of the spring bolts and the distribution directions of the lock holes. By means of the revolving stage with the magnetic-coded-connection guard bars, the problem that no guard bar exists on an existing revolving stage is solved.

The invention discloses a method and a device for controlling a block processing task, belonging to the technical field of block chain, in the method and device provided by the present invention, theblock processing task is divided into successive multi-level processing subtasks, and at least one corresponding-level execution module is configured for each level processing subtask, and each levelexecution module continues to execute the level processing subtask on the next level processing subtask after executing the level processing subtask on the current level processing subtask on the block to be processed. As such, on one hand, the process subtasks at each level can be sequentially performed by the execution modules at each level; On the other hand, each level execution module continues to execute the next level processing sub-task of the block to be processed after executing the current level processing sub-task of the block to be processed, thus realizing the block processing tasks of processing multiple blocks to be processed in parallel, and further accelerating the processing speed of the block processing tasks between blocks.

The invention relates to a polyurethane or polyurethane-urea aqueous dispersion with excellent heat-damp resistance performance, and a preparation method and application thereof. Polyurethane or polyurethane-urea is prepared through a reaction among at least one siloxane component with at least two NCO reactive functional groups, at least one siloxane component with at least one NCO reactive functional group, at least one polyol component with the functionality of 2-4, at least one polyisocyanate component, at least one hydrophilic compound component, at least one NCO reactive, monofunctional,nonionic and hydrophilic compound and the like. The polyurethane or polyurethane-urea aqueous dispersion has the excellent heat-damp resistance performance, thereby being suitable for preparation ofhigh-quality paint and sealants, especially adhesives.

The invention provides a steel plate for a seamless high pressure gas cylinder. The steel plate is characterized by comprising the following components, by weight, 0.28- 0.40% of C, 0.20-0.40% of Si, 0.50-1.50% of Mn, 0.010% or less of S, 0.015% or less of P, 1.20% or less of C, 0.50% or less of Mo, 0.10-0.50% of Ni, 0.010-0.030% of Ti, 0.050% or less of Al, and the balance of iron (Fe) and other inevitable impurities. The invention further provides a manufacture method for the steel plate. The method comprises processes of smelting, hot rolling, reeling, holding, quenching and tempering. According to the present invention, after quenched-tempered heat treatment, yielding strength of the steel plate is higher than 990 MPa and tensile strength of the steel plate exceeds 1100 MPa, and impact energy of the steel plate is over 40J / cm<2> at a temperature of -50 DEG C, such that the steel plate can be used for manufacturing various compressed gas steel cylinders, particularly high pressure gas cylinders.

An industrial wireless local area network is widely applied to various industrial fields, data transmission is often interfered due to the special environments of industrial sites, the types of the data needed to the transmitted in the industrial sites are diversified, the data includes state data, control instructions, images and the like, and the transmission performance requirements of the data are different. The invention discloses a reliable and real-time industrial wireless local area network transmission method. The method adopts classified transmission for various types of data, that is to say, important data is transmitted first to guarantee the time sequence requirements. A double confirmation mechanism is adopted to guarantee data accuracy. A data transmission timer timing self-adaptation adjusting method based on network communication state is provided for fully utilizing network bandwidth. By the transmission method, instantaneity and reliability of industrial wireless local area network data transmission can be effectively increased, and application of the industrial local area network to severe industrial environments is promoted.

The invention discloses a high-elongation aluminum alloy section bar and a making method thereof. The high-elongation aluminum alloy section bar comprises, by mass, 0.15-0.35% of Si, 0.04-0.08% of Cu, 1.8-2.6% of Mg, 0.10% or less of Zn, 0.5-0.9% of Mn, 0.45-0.65% of Li, 0.1-0.3% of Cr, 0.25% or less of Fe, 0.05% or less of Ti, 0.15-0.25% of Ta, 0.1-0.2% of Be, 0.03-0.06% of Y, 0.02-0.04% of Lu, and the balance Al. The aluminum alloy section bar has a high elongation reaching above 15%, also has a high tensile strength and a high yield strength, and completely meets performance demands of bridges, thin walls and complex section industrial section bars.

The invention relates to a ZrC-TiC modified C / C-SiC composite material and a preparation method thereof, belonging to the technical field of preparation of composite materials. The composite material disclosed by the invention comprises carbon fibers, a pyrolytic carbon layer, SiC and ZrC-TiC, wherein the pyrolytic carbon layer coats the surface of the carbon fibers; SiC and ZrC-TiC coat the surface of the pyrolytic carbon layer; and ZrC-TiC is uniformly distributed in SiC. The preparation method comprises the following steps: preparing a low-density C / C composite material by adopting chemical vapor infiltration; melting Si, Zr and Ti powder, infiltrating the powder into the C / C composite material by virtue of a capillary action, and forming a ceramic phase in pores by virtue of a high-temperature in-situ reaction, thereby obtaining the ZrC-TiC modified C / C-SiC composite material. With the adoption of the process method which is low in cost, rapid and convenient, the service temperature of the C / C-SiC composite material is effectively improved, and the ultra-high temperature ablation resistance of the material is greatly enhanced.

The present invention discloses a factor graph-based sparse code multiple access (SCMA) and low density parity check (LDPC) joint detection decoding algorithm and apparatus. Decoding information of LDPC is used to assist SCMA multi-user detection, an SCMA detection iteration process and an LDPC decoding iteration process are jointed on a factor graph so as to obtain a joint factor graph of SCMA detection and LDPC decoding, so that information integration of SCMA detection and LDPC decoding is performed in each iteration process. From the point of bit energy efficiency, ideal single-user transmission performance can be almost reached; and from the point of average iteration times, the iteration times of the present invention is far less than that of an outer iteration solution and is equivalent to that of a traditional non-feedback solution. The convergence speed is high, and no obvious, extra detection and decoding complexity is caused. The algorithm and apparatus better meet performance demands of a 5G system in the future.

The invention discloses a method for updating residual tickets. The method comprises the steps that firstly, when the number of the residual tickets changes, a transaction server arranges and sends residual ticket data to a station ticket business server; secondly, application servers regularly inquire and acquire the residual ticket data in the station ticket business server, empty the original residual ticket data in internal storage structural bodies of the application servers and then store the acquired residual ticket data into the structural bodies. A plurality of client sides are connected with the application servers through a load balancer, and a data storage structure in the structural bodies is a Dictionary storage structure. According to the method for updating the residual tickets, the residual ticket data are stored into the internal storage structural bodies of the application servers from a database, and due to the facts that the structural bodies are reasonably designed and the client sides are connected with the application servers through the load balancer, the requesting responding time to the client sides for the residual ticket inquiring can be greatly shortened, and a large concurrence number of inquiring requests are met.

The present disclosure provides a method of fabricating a Fin FET element including providing a substrate including a first fin and a second fin. A first layer is formed on the first fin. The first layer comprises a dopant of a first type. A dopant of a second type is provided to the second fin. High temperature processing of the substrate is performed on the substrate including the formed first layer and the dopant of the second type. The invention provides unniform doping profile and does not generate shadow shielding effect, and satisfies performance requirement of the Fin FET element.

The invention relates to a production process of colored flat acrylic fiber and a production line thereof, which are a production process and a production line thereof for producing the colored flat acrylic fiber in a plurality of color systems with vivid colors, little chromatic aberration and great flatness by adopting a cationic dye, in particular to a spinning production line for producing the colored flat acrylic fiber by adopting a ternary aqueous suspension polymerization and sodium sulfocyanate wet method. In the invention, a long-strip arc dye liquor spray head is used for dying, and the long-strip arc dye liquor spray head is an arc spray head which comprises a spray head seat, a spray head cover and a dye liquor inlet pipe and has a hollow T-shaped cross section, wherein the spray head is a long-strip semi-cylindrical surface, and a plurality of penetrative spraying holes are arranged on the spray head cover in a staggered way. The invention overcomes the defects of stripy and uneven dyeing, great chromatic aberration, large volume of colored wastewater, long product processing period, and the like commonly existing in a production process and a production line thereof for producing white flat acrylic fiber by adopting a traditional dyeing mode of steaming loose fibers at a high temperature.

The invention belongs to the technical field of wireless communication, and mainly relates to a hemispherical coverage beam forming technology for special arrays. According to an array design method for hemispherical coverage beam forming, a frustum conformal array is formed by 24 six-element sub-arrays, and an antenna performs coverage in an omnidirectional manner in the 360-degree range of the horizontal plane and performs coverage in the 0-62.3-degree range of the pitch angle. In the communication process, low-cost and accurate hemispherical coverage beam forming can be realized, and the performance demand of a system is met; and compared with planar or curved conformal phased arrays, the structure is simple, and innovation is achieved.

The invention discloses data transmission methods, data transmission devices and a system, and relates to the technical field of communication. One data transmission method comprises the following steps: a network device sends configuration information to a first terminal device, then the first terminal device selects a first adjustment mode from N adjustment modes according to a measurement result after receiving the configuration information sent by the network device, wherein the measurement result is obtained in a manner that the first terminal device measures signals; then, the first terminal device determines to adjust a first data transmission format into a second data transmission format according to the selected first adjustment mode, wherein transmitting power corresponding to the second data transmission format is less than the transmitting power corresponding to the first data transmission format; and finally, the first terminal device sends data to the network device according to the second data transmission format. By the technical scheme above, reduction of cross link interference between the terminal devices is facilitated, and at the same time the utilization rateof time-frequency resource is improved.

The invention provides a hydraulic motor preset performance tracking control method with hysteresis compensating. The method comprises the steps that 1. a double-vane motor position servo system mathematical model with hysteresis is established; 2. a preset performance tracking control method with hysteresis compensating is designed; and 3. system parameters are designed. Preset performance requirements are fully considered, system hysteresis nonlinearity and high gain feedback are considered, the hydraulic motor preset performance tracking control method with hysteresis compensating is provided, according to the method, hysteresis nonlinearity is subjected to modeling to form the sum of a linear term and a bounded disturbance term, designing of a following moving controller is very convenient, for system parameter uncertainty and a non-modeling disturbance term, a self-adaptation robust control method is used, and meanwhile good parameter estimation and robust boundedness stability are guaranteed.

The invention discloses a transmission method and system of group speech data package, in order to increase the transmission efficiency of VoIP service. The sending end generates CRC verifying field based on one of IP packet header, UDP packet header, RTP packet header, CMR, ToC, and a substream of VoIP data package to be sent or any combination. The said verifying field is added to the said data package to be sent. The receiving end verifies only partial content of the data package, therefore the number of retransmission due to verity error is greatly reduced. For the voice coded by AMR, the length of CRC verifying field is contracted to 12 bits, under the precondition of satisfying the transmission demand, the required resource for transmitting the verifying field is reduced and the system capacity is furthermore increased.

The invention provides a UV crosslinking and curing acrylate modified EVA optical adhesive film and a preparation method thereof. The EVA optical adhesive film is prepared from the following raw materials in parts by weight: 50-93 parts of ethylene-vinyl acetate copolymer, 7-50 parts of multifunctional acrylate reactive monomer, 0.5-3 parts of free radical photoinitiator, photostable 0.1-0.5 part of anti-oxidant, 0.1-0.5 part of antioxidant, 2.5-10 part of coupling agent. The EVA optical adhesive film not only has the characteristics of simple lamination process, can be reworked, improves production efficiency, reduces defective rate and production cost, but also has excellent mechanical properties, water vapor barrier properties, heat resistance and stability, and other weather resistance.