79results about How to "Resolve slow performance" patented technology

The invention relates to a power transmission line pilot protection method based on magnitude of current, which comprises the following steps: firstly, collecting A, B and C three-phase current of a current transformer by use of protective devices installed at two ends of a power transmission line, then treating the collected three-phase current to obtain sampling values; after that, sending the sampling values at the corresponding end of the power transmission line to the opposite end by each protective device which receives the sampling value sent from the opposite end; after that, performing phrase-to-modulus conversion on the sampling values of the three-phase current to obtain corresponding modulus information; computing current fault component at the two ends of the power transmission line as delta im(t) and delta in(t); after that, collecting power frequency component and transient component of the current fault component at the two ends of the power transmission line in sequence; computing power frequency component and transient component of voltage at installing parts of the protective devices at the two ends of the power transmission line; computing system impedance parameters at the two ends of the power transmission line as Lm, Rm and Ln, Rn; computing transient current energy; computing model error En and Em to judge the fault position if the transient current energy is relative big; and judging the fault position according to the changing amplitude of the system impedance parameters and the voltage and power frequency component. The power transmission line pilot protection method provided by the invention has the characteristics of only using information composition of two-end current and not being influenced by distributed capacitance.

The embodiment of the invention discloses a method and device for improving the disk array performance. The method includes the steps of receiving a storage request; determining the data type of to-be-stored data in the storage request; when it is determined that the data are metadata, storing the metadata into VLUN in the first type, wherein the stripe capacity in the VLUN in the first type is smaller than a first preset value; when it is determined that the data are file content data, storing the file content data into VLUN in the second type, wherein the stripe capacity in the VLUN in the second type is larger than a second preset value, and the second preset value is larger than the first preset value. The method and device are suitable for disk array performance optimization.

The invention discloses a semi-supervised learning industrial process soft measurement modeling method based on evolutionary optimization. The method is used for solving the problem of low predictionperformance precision of a traditional soft measurement model caused by less label data acquisition and rich label-free data in the industrial process. Pseudo-label estimation is carried out on randomly selected samples in unlabeled data in an evolutionary optimization mode, the obtained pseudo-label data is added into the labeled data, hybrid modeling is carried out through Gaussian process regression, and the performance of a traditional soft measurement model is effectively improved. Besides, small-batch random selection optimization is performed on the label-free data so as to bring diversified pseudo label data optimization results, and the prediction accuracy and stability of the model can be further enhanced through the idea of fusion ensemble learning so that control and monitoringof the industrial process are enabled to be safer and more reliable.

The invention provides an impedance matching device and method of a mobile communication device. The impedance matching device of the mobile communication device comprises two electrodes, a resistance measurer, an adjustable matching circuit and a controller. The two electrodes are made of conductive material and configured on the shell of the mobile communication device; the resistance measurer is coupled with the two electrodes and used for measuring the resistance value between the two electrodes; the adjustable matching circuit is coupled between the antenna of the mobile communication device and a radio frequency circuit and comprises at least one adjustable impedance element; and the controller is coupled between the resistance measurer and the adjustable matching circuit and is used for adjusting the impedance value of the adjustable impedance element according to the resistance value, so that the impedance value of the antenna is matched with the impedance of the radio frequency circuit.

The invention relates to a detection processing method for data flow, central processing unit and switch. The method includes acquiring the recording time of the front packet having the identical data characteristic information with the current packet, according to the received current packet; adding 1 to the packet counting when the difference between the recording time of the front packet and the current recording time is smaller than a scheduled detecting cycle; and executing corresponding process operations, when the value of packet counting after adding 1 exceeds a prescribed waterline. The central processing unit includes a time acquiring unit, a current time setting unit, a packet counting unit and a detecting processing unit. The switch provided with the central processing unit, limits speed of the data stream received by the switch in real time by counting the time difference between the identical packets, alleviates the detecting process load of the switch CPU and improves the detecting processing efficiency and attack resistance capability of the switch.

The invention relates to the field of high-strength high-conductivity copper-chromium-zirconium alloy, in particular to a production process of a high-strength high-conductivity copper-chromium-zirconium alloy long wire. The process includes the steps of subjecting copper-chromium-zirconium alloy rods (wires) to flash butt welding, subjecting welds and matrix grains to continuous extrusion and refining, and performing cold deforming and ageing. The process has the advantages that mechanical properties of copper-chromium-zirconium alloy matrix and welds are improved, mechanical properties and electrical properties of the welds are close to those of the matrix, the problem that the performance of the copper-chromium-zirconium alloy decreases after welding is solved, and the copper-chromium-zirconium alloy long wire with fine performance is produced. The production process is applicable to high-strength high-conductivity copper-chromium-zirconium alloy, and the diameter of the copper-chromium-zirconium alloy rods (wires) for connection ranges from 10mm to 40mm.

Embodiments of the invention provide a terminal access authentication method and device. The method comprises the following steps: access equipment sends an MAC non-perception authentication request to an authentication server according to a first MAC address of a to-be-authenticated non-dumb terminal; a first-group strategy fed back by the authentication server according to the first MAC address is received, wherein the first-group strategy is determined according to a correspondence relationship between the MAC address of the non-dumb terminal and the group strategy; a first access authority corresponding to the first-group strategy is determined, and an access authority of the to-be-authenticated non-dumb terminal is determined according to the first access authority, wherein the first access authority is a preset visitor access authority. Through applications of the terminal access authentication method and device, the problem of performance reduction, resulted from the fact that the non-dumb terminal continuously initiates MAC non-perception authentication, of the authentication server can be solved.

The invention discloses a performance optimization method and system for a distributed storage system, electronic equipment and a computer readable storage medium, and the method comprises the steps:receiving a creation instruction, and creating target and volume mapping according to the creation instruction; sending the related information corresponding to the target and the volume mapping to atgtd service through inter-process communication; and the tgtd service is utilized to store the transmitted target and the related information corresponding to the volume mapping in a map, so that data can be directly acquired from the map when an access request is received. Known from above, according to the method, after the target and the volume mapping are created, the volume mapping is performed; according to the embodiment of the invention, the related information corresponding to the target and volume mapping is stored in the map, and other modules can directly access the map to obtainthe required data, so that the updating and access efficiency is effectively improved, and the problem of performance reduction caused by relatively large target and volume mapping magnitude is solved.

The invention provides a comprehensive geological borehole logging lithology identification method, which comprises the following steps of: refining borehole logging data to obtain a refined data set,including missing value filling, equalization processing and data set normalization processing on the borehole logging data; enabling refined data set to be subjected to dimensionality reduction processing according to a tSNE algorithm, improving and optimizing a BP neural network according to a PSO algorithm, obtaining the optimal initialization weight and threshold value of the network, establishing a network model, and carrying out training learning on the dimensionality reduction data set through the established network model.According to the method, drilling and logging data is refined,the problem that the final recognition rate is too low due to the fact that acquired drilling and logging data are missing, data sets are unbalanced and training data are not in a unified dimension range is solved, dimension reduction processing is conducted on the drilling and logging data sets according to the tSNE algorithm, data are simplified accordingly, a common BP neural network in the prior art is optimized through the PSO algorithm, and the identification accuracy and the identification rate are improved.

The invention relates to a nacelle cooling and air inlet passage ice preventing compound device and a turbofan engine. The nacelle cooling and air inlet passage ice preventing compound device comprises a circulation pipeline distributed in an air inlet passage cabin and a nacelle. Heat exchange liquid is arranged in the circulation pipeline in advance, flows in the circulation pipeline, sucks heat in the nacelle to lower the temperature in the nacelle and releases heat in the air inlet passage cabin to prevent the air inlet passage from being frozen. The nacelle cooling and air inlet passage ice preventing compound device can conduct ice preventing on the air inlet passage and can also conduct cooling fire preventing on the nacelle, in addition, the problem that the performance of the engine is reduced due to the fact that a heat air source of an engine core machine is extracted in the hot air ice preventing process of a traditional air inlet passage is solved, the problem that the performance of the engine is reduced due to the fact that outer culvert gas of the engine is extracted during ventilating cooling of a traditional nacelle is solved, and meanwhile the power supply load of the engine cannot be increased.

The invention provides a log mode based memory space management method and device. The method applied to memory equipment includes: when applying for memory space or releasing the memory space, recording the corresponding application or release log in a second map region (SMR) of preset size, wherein the application or release log is used for recording an initial position and size information of the applied or released memory space; according to certain strategy, sequentially executing memory space combination on the application or release log and a previous combined log, and recording the combined log generated at the time in the SMR, wherein the combined log records the initial position and size of spare memory space. By the method and device, the problem that equipment performance is reduced due to release of plenty of random memory space during existing memory space management is solved, and the requirement on memory capacity of the memory equipment is low.

The disclosed space-frequency signal processing method comprises: a. pro-processing the received array signal, transforming signal into frequency domain for 2D receiving signal by FFT; b. shaping large-group sub-carrier wave beam to obtain one-dimensional frequency-domain output signal; c. estimating and balancing channel; and d. recovering signal from step c to emission state. This invention overcomes defects in prior art, reduces calculation complexity, and ensures system performance free to wireless channel variation.

The invention discloses a flame-retardant wood-plastic composite and a preparation method thereof. The flame-retardant wood-plastic composite comprises the following components in percentage by mass:15-18% of waste PE sheets, 14-16% of waste ceramic powder, 60-64% of wood fibers, 1-3% of flame retardant, 0.5-3% of lubricant, 0.05-0.5% of antioxidant, 0.05-0.5% of mildewcide, 0.5-3% of tert-butyldiphenylchlorosilane, 1-2% of ammonium iron sulfate, 0.5-1% of polyhexamethylene biguanidine. Tert-butyldiphenylchlorosilane, ammonium iron sulfate, polyhexamethylene biguanidine and other raw materials are mixed, and a compatilizer is not added, so that the problem of material performance lowering caused by side reactions in a mixing process of the raw materials can be effectively solved, the waste ceramic powder can be uniformly mixed with other raw materials without surface treatment, the preparation method is simple, and the prepared flame-retardant wood-plastic composite has relatively high bending strength and also has good flame retardance and water resistance.

The invention discloses a multimedia message service transmission method, apparatus and system. The multimedia message service method comprises: multimedia message gateway disassembles a group sent multimedia message from the provider into a multimedia message content information and a multimedia message target user information; and sends the disassembled content information and target user information to a multimedia message center respectively; the multimedia message center saves the content information, and sends a content information acquiring notification message to the target user corresponding to the target user information; and sends the saved content information to the target user after receiving a acquiring message from the target user. By the above technical scheme, the invention can reduce the load of mobile phone newspaper sending system and increase the system efficiency.

The invention provides a face recognition method based on non-uniform distribution, and belongs to the field of image mode recognition. Firstly, a face detector is used for detecting and interceptingface areas, then an affine transformation matrix is used for carrying out side face correction operation on all the intercepted face areas, and then a deep learning model is used for extracting features of a face picture subjected to side face correction. Training and testing are performed on a deep learning model, and the training and the testing comprise: (1) training the deep learning model; and (2) after side face correction operation is carried out on a face area detected and intercepted by a face detector, extracting original features by utilizing the trained deep learning model, carrying out normalization processing, and calculating cosine similarity between normalized features of different original features to judge whether the features belong to the same person or not. A large-boundary feature enhancement technology and a migratable feature normalization technology are combined, so that the face recognition efficiency is greatly improved, and the stability of a face recognition system is also greatly improved.

The invention relates to the field of admixtures for building materials, in particular to a microwave-responsive admixture active release capsule and a preparation method thereof. The active release capsule is composed of a capsule wall, a capsule core and a packaging material, wherein the capsule wall is made of porous ceramsite; the capsule core is an admixture needing to control active release;and the packaging material is an organic phase change material doped with Fe3O4. The method disclosed by the invention is rapid, simple and convenient, the used materials have wide sources, the active release capsule can stably exist in building materials, has strong additive loading capacity, and can be widely applied to loading of various admixtures. Besides, the microwave responsiveness and the wave-absorbing and heat-generating functions of Fe3O4 in the packaging material are utilized, the capsule response can be triggered by applying an external microwave signal to actively release the admixture, so that the problems of low utilization efficiency, even possible negative effect and the like when the admixture is directly doped into the building materials are effectively solved, and the active control on the performance of the building materials is further realized.

The invention provides a matching method for a horizontal screen mode and an antenna mode of a mobile terminal and the mobile terminal. A first side of the mobile terminal is equipped with a first antenna. A second side corresponding to the first side is equipped with a second antenna. The method comprises the steps of obtaining a data communication network currently connected with the mobile terminal; and adjusting a matching relationship of the horizontal screen mode and the antenna mode of the mobile terminal according to the data communication network, wherein when the horizontal screen mode and the antenna mode of the mobile terminal match, the side at which the antenna for transmitting the signal of the data communication network is located is a non-handheld side. According to the scheme provided by the invention, the problem that in the prior art, the antenna performance is reduced due to the fact that the antenna for transmitting the signal of the data communication network is liable to be shielded by fingers of a user when the mobile terminal is in the horizontal screen mode is solved.

The invention discloses a method for preparing an ultra-high performance concrete admixture by using concrete waste slurry. The method comprises the following steps: firstly, adding a surfactant into the concrete waste slurry, and dropwise adding a mixed solution of nitric acid and ferric chloride to obtain an impurity I and a solution A; adding the impurity I into a nitric acid solution, injecting a hydrofluoric acid solution, reacting for a period of time, adding a sodium hydroxide solution, and filtering out particles to obtain a solution B; dissolving a methacrylic acid copolymer in water, and dropwise adding sodium hydroxide to adjust the solution to obtain a solution C; and slowly pumping the solution A and the solution B into the solution C at the same time to obtain an admixture mixed solution D, and performing spray drying to obtain the concrete powder admixture. After the concrete waste cement paste is modified by the method, the problem that the concrete performance is reduced due to the fact that the concrete waste cement paste serves as a high-performance concrete admixture is solved, it is ensured that the early strength of the ultra-high-performance concrete is improved, and resource utilization and fine high-end utilization of the concrete waste cement paste are achieved.

The invention discloses a preparation method of a hydrogen evolution reaction catalyst with a layered mesoporous structure. The preparation method comprises the following steps: stirring oxalic acid,melamine, ammonium paramolybdate and water at the temperature of 65 DEG C, cooling to the room temperature and then adding water and keeping stirring, centrifuging, washing, heating to the temperatureof 900 DEG C in the atmosphere of nitrogen and insulating for 2 hours to obtain the hydrogen evolution reaction catalyst with the layered mesoporous structure. The invention further discloses the hydrogen evolution reaction catalyst with the layered mesoporous structure prepared by the preparation method. The hydrogen evolution reaction catalyst with the layered mesoporous structure has the advantages that the operation process of the preparation method is simple and convenient, preparation conditions are simple but are not rigorous, the production cost is low, and quantity production is facilitated; and durability is high, and the hydrogen evolution reaction catalyst with the layered mesoporous structure is suitable for long-time hydrogen evolution reaction catalysis, and has wide industrialized application prospect.

The invention discloses a remanufacturing permanent magnet motor based on a mixed permanent magnet and a mixed laminated iron core. The remanufacturing permanent magnet motor comprises a mixed permanent magnet, a mixed laminated stator / rotor iron core, and an usable enclosure, end cover, shaft and the like in a waste motor. The mixed permanent magnet is segmentally arranged along an axial direction. At least one segment of the permanent magnet is a permanent magnet segment dismounted from the waste motor and is located in a middle or end part position of the mixed permanent magnet. According to the mixed laminated stator / rotor iron core, a stator / rotor iron core is segmentally arranged along the axial direction to be stator / rotor lamination segments of different materials, the mixed laminated stator / rotor iron core includes first stator / rotor lamination segments of iron-based amorphous alloy materials or remanufacturing silicon steel materials and second stator / rotor lamination segments of materials of recycled silicon steel dismounted from the waste motor; and the first stator / rotor lamination segments and the recycled permanent magnet segments are equal in length and are locatedin the same axial positions. The output torque of the remanufacturing permanent magnet motor is effectively improved, the loss is reduced, the motor performance is improved, and thus specific application of the remanufacturing permanent magnet motor is promoted.

Disclosed is an energy storage device, in which an electrode material including an aqueous solvent, a binder and a transition metal oxide containing lithium is used to form one electrode, and an electrode material including activated carbon is used to form the other electrode. In particular, the energy storage device ensures reliability and maximum capacitance efficiency by optimizing density and thickness values of the electrode materials for the cathode electrode and the anode electrode.

The invention provides a device used for carbon fiber surface modification. The device comprises twin-stage epoxy resin bath devices, an oxidation treatment device, a carbon fiber surface washing device and a drying device which are connected in sequence, wherein a carbon fiber surface scrubbing device is arranged between the twin-stage epoxy resin bath devices; the oxidation treatment device is a high-temperature reaction kettle; an epoxy resin bath device is arranged between the carbon fiber surface washing device and the drying device; the drying device is an electric heating baking oven. The problems that the final composite material performances of carbon fibers are reduced as the strength of the carbon fibers is lost while the surface performances of the carbon fibers are improved in existing carbon fiber surface modification methods are solved by adopting the device.

The invention discloses a method and a device for processing messages in a load balance environment. The method comprises the following steps of: configuring a specific port set for transmitting messages to a client for each server in a cluster in the load balance environment, selecting a main server in the cluster according to a preset rule, installing a monitoring and intercepting repeater in each server of the cluster, further judging whether the server is the main server or not, if not, intercepting all messages transmitted to access equipment by the specific port set of the server through the monitoring and intercepting repeater, forwarding the messages to the main server, and transmitting the messages to the access equipment through the specific port set configured in the main server. Through the technical scheme, the problem that response of the client cannot be received or the performance of the server declines after the server actively transmits the messages in the load balance environment in the prior art is solved.

The invention discloses a heat dissipation structure of a head-mounted intelligent terminal. A cold plate is in contact with the top surface of a main chip on a PCB in the product; a micro-channel matched with flowing of cooling liquid is formed in the cold plate, a left adapter and a right adapter which are communicated with the micro-channel are arranged at the left end and the right end of thecold plate respectively, the left adapter and the right adapter are communicated with a micro-pump and a heat dissipation component through hoses respectively, and a heat dissipation structure matchedwith circulating flowing of the cooling liquid in the heat dissipation structure is jointly formed. The cold plate with the micro-channel and the corresponding water cooling structure are adopted; the advantage of lower thermal resistance is utilized; a large amount of heat generated by a main chip during working is transferred to a local cold region which is difficult to realize by adopting a conventional heat dissipation method more quickly and efficiently; the defects of main chip heating, surface shell scalding and the like of the product in a high-performance use scene are effectively overcome, and the problems of performance reduction, service life shortening and the like of the product due to high temperature are effectively solved while the user experience is obviously improved.

The invention discloses a battery under-voltage protection circuit having a segmented voltage processing function and a protection method and belongs to the technical field of battery under-voltage protection. By means of the device and the method, under-voltage protection can be performed on a battery, and the problem that a battery under-voltage state enables the battery performance to be reduced is solved. The technical scheme is that the battery under-voltage protection circuit comprises three under-voltage detection circuits and a controller, the voltage output end of the battery is respectively connected to the input ends of the three under-voltage detection circuits, the output end of the battery the respectively connected to three input interfaces of the controller, and three output interfaces of the controller are respectively connected to a battery indicating lamp circuit, a battery dormancy circuit and a battery switching circuit. The battery under-voltage protection method comprises the steps that the three under-voltage detection circuits feeds a battery under-voltage state to the controller when detecting that output voltage of the battery is reduced to be a set voltage value; the controller controls the battery indicating lamp circuit, the battery dormancy circuit and the battery switching circuit.

The invention discloses a handwritten data signature recognition method based on a mask pre-training model, and relates to the technical field of data recognition processing. The method comprises steps of extracting various writing feature information generated by writing on terminal equipment; preprocessing the plurality of feature sequences to obtain a plurality of feature data sequences with fixed lengths; covering and shielding partial feature values in the feature data sequence; converting a plurality of feature data sequences of which partial feature values are covered into feature vectors of corresponding features, superposing all the feature vectors and carrying out layer normalization and coding, extracting a feature sequence corresponding to the covered part, and confirming a mean square error function by combining a predefined target value; and updating the network weight of the prediction model through a mean square error function, and constructing the prediction model to identify the handwriting features. The invention can be widely applied to electronic signature recognition.

The invention relates to a preparation method of a fiber-reinforced metal matrix composite material with directionally arranged fibers without intersection. The method comprises the steps of adoptinga meteorological deposition method for forming an interface barrier layer on a fiber surface; carrying out deposition on the fiber surface to form a metal coating; and winding pioneer yarn around a ring piece to obtain an annular fiber band with fibers which are arranged without intersection in a uniform and directional manner, fixing a fiber segment partially and cutting off or out the fiber segment, placing the fiber segment into a package sheathing to prepare a preformed body with directionally arranged fibers without intersection, and then making a blank part through electron beams and hotisostatic pressing. Therefore, the fiber-reinforced metal matrix composite material with the controllable volume fraction and directionally arranged fibers without intersection is obtained. Accordingto the preparation method of the fiber-reinforced metal matrix composite material with the directionally arranged fibers without intersection, the metal coating is formed on the fiber surface by adopting a physical meteorological deposition method, the volume fraction of the fibers is determined by the thickness of the metal coating, and preparation of the composite material with the high volumefraction is effectively guaranteed; and the method is simple in process, good in controllability, high in production efficiency, and beneficial for implementing preparation of high-performance fiber-reinforced metal matrix composite material connecting pieces.

The embodiment of the invention provides a motor and a vehicle, the motor comprises a stator core and flat wire winding structures, the flat wire winding structures are wound on the stator core through stator slots, each stator slot is internally provided with n layers of flat wire winding structures, each phase of the flat wire winding structures comprises a first part and a second part, the number of the layers of the first part in the stator slot is a, and the number of the layers of the second part in the stator slot is a. The number of the layers of the first part in the stator groove is a, the number of the layers of the second part in the stator groove is b, a is not equal to b, and each phase of flat wire winding structure is in each pole, the stator groove wound with the first part and the stator groove wound with the second part are staggered by y1 grooves, namely, the first part and the second part of each phase of the flat wire winding structure are relatively staggered by y1 grooves, and the equivalent pitch y between the phase bands of the same-phase winding located under the two adjacent poles is equal to y0-y1, and the pitch y is smaller than the pole distance y0, so that the flat wire winding structure is a short-distance winding, a good torque ripple suppression effect is achieved when the motor runs, the back electromotive force harmonic wave of the motor is reduced, and the performance of the motor is improved.

The invention discloses a treatment method for cronidur30 bearing steel, a reinforced cronidur30 bearing steel and a bearing. The method includes: employing metal high-energy ions and large beam current gas ions to perform alternate bombardment on cronidur30 bearing steel so as to inject metal ions and gas ions to the surface of the cronidur30 bearing steel, firstly injecting at least two different metal ions to the surface of the cronidur30 bearing steel, and finally injecting gas ions to the surface of the cronidur30 bearing steel. The method provided by the invention can solve the problem of material performance reduction caused by nitrogen loss on the surface of the cronidur30 bearing steel, and also can significantly improve the antiwear and friction reduction properties of the cronidur30 bearing steel.