170results about How to "Improve imbalance" patented technology

A vibration damper for a tubular propeller shaft in the drive train of a motor vehicle having a mass body mounted concentrically, in the propeller shaft or in a sleeve attached in the propeller shaft, by way of at least one rubber spring element. Metal and / or flexible rubber stop elements that limit the vibration travel of the mass body at least in the radial direction are arranged between the mass body and the sleeve. Alternatively, the mass body and / or the sleeve are configured at least locally, in mutually opposite regions, as stop elements that limit the vibration travel of the mass body at least in the radial direction.

The invention discloses a power battery pack equalizing circuit and a power battery pack equalizing method, which are used for equalizing a power battery pack with at least two single batteries. The device comprises a battery pack, a sampling module, a control module, a dual-way DC / DC converter, an auxiliary power supply, and a relay network, wherein the power battery pack consists of at least two single batteries; the sampling module acquires the voltages of the single batteries; the dual-way DC / DC converter and the auxiliary power supply are used for charging and discharging the single batteries; and the relay network is connected with the battery pack and the dual-way DC / DC converter. In an equalizing process, the control module determines the single battery to be equalized according to the data of the sampling module and controls the closing and working modes of the dual-way DC / DC converter and the switching of the relay network, so that the battery to be equalized is charged or discharged. The power battery pack equalizing circuit and the power battery pack equalizing method can ensure that the voltage difference between the single batteries is no greater than a value set by the control module and improve the imbalance between the single batteries.

The invention provides a SAR image sample generation method based on a sketch and structure generation antagonistic network, which mainly solves the problem of sample imbalance in the semantic segmentation of the SAR image. The method comprises the following steps of: (1) sketching a SAR image to obtain a sketch map; (2) according to the region map of SAR image, extracting the small extremely heterogeneous region; (3) constructing a paired data set of sketch blocks-SAR image blocks; (4) selecting the samples from the data set to compose the training set and the test set; (5) constructing a generating antagonistic network based on sketch information and structural constraints; (6) training the sketch fitting network, the discrimination network and the generation network alternately by sketch line loss, antagonistic loss and generator loss,; (7), inputting a test sketch block to the trained generation network to obtain a generated SAR image block. The invention can generate SAR image samples coinciding with the original SAR image ground object structure according to the sketch map, and can solve the sample unbalance problem of extremely uneven region classification of the SAR image.

The invention relates to a dynamic loss reduction method for a distribution network and a synthesized loss reduction system of a distribution network. A principle that an electric field and a magnetic field are mutually symbiotic and affected is applied for dynamically realizing electromagnetic balance; the treatment of'peak load shifting'is carried out on the current difference value between three-phase unbalanced currents caused by the dynamic unbalance of the power used by a three-phase load at the secondary side of a distribution transformer so as to lead the current difference value to approach balance, reduce a zero sequence current and the unbalance degree of the three phases, and restrain a harmonic, thereby realizing the self loss (loss on transmission) of the distribution transformer and the line loss (the copper loss of the line) at the first side and the secondary side of the distribution transformer; the synthesized loss reduction system of the distribution network realizes the synthesized loss reduction management of the distribution network, the loss on transmission of the distribution transformer as well as the automatic measuring and accounting on the data of the copper loss of the line at the first side and the secondary side thereof; the system also realizes the remote automatic collection on the power data of the distribution transformer in the same time as well as the accounting of the line loss of a distribution line, calculates and accounts the line loss of the distribution network, calculates and analyzes the loss reduction as well as analyzes the benefits of energy saving and emission reduction.

The invention discloses a charge method of a lithium ion power storage battery, relating to the field of charge technology of lithium ion power storage batteries. The charge environmental conditions are as follow: one standard atmospheric pressure, temperature 25 plus or minus 5 DEG C and humidity is less than or equal to 85% RH, and different constant currents are adopted to charge the battery under different voltage limiting stages. Through the charge method, the battery can not be overcharged and can be charged fully, thus having equilibration function. Meanwhile, the voltage range of the current equilibration process is reduced, thus unnecessary circulation loss of a single battery cell can be avoided as much as possible, the problem of charge unbalancedness of a battery pack can be solved and the working performance can be improved.

The present invention relates to an underwater propelling device (10) ia stator (20) comprising circumferential arrayed coils (35) and being adapted to generate a controlled electromagnetic field along an axial direction,a shaftless propellant rotor (30) comprising:at least two magnetized ring-shaped plates, respectively an upper magnetized plate (31) and a lower magnetized plate (32), coaxially spaced-apart along said axial direction and perpendicular thereto such that said circumferential arrayed coils (35) are positioned therebetween, each plate (31, 32) defining a central aperture (31a, 32a) and having a circumferential array of radially extended magnetized poles (34) embedded therein, said magnetized poles (34) generating a magnetic field which interacts with the electromagnetic field of the stator (20) so as to cause the rotation of said plates (31, 32) about a central axis (ZZ′) parallel to said axial direction,at least one ring-shaped propeller (33) defined by its outer periphery and its inner periphery, said propeller being received inside the central apertures (31a, 32a) of said plates (31, 32) and fixedly secured thereto,a plurality of propeller blades (35) projecting inward from the inner periphery of said propeller (33), said blades (35) producing a thrust along the central axis (ZZ′) when the plates (31, 32) rotate,wherein the rotor (30) is axially separated from the stator (20) by a gap, preferably less than 3 mm, so as to permit the formation of a hydraulic film inside said gap, said hydraulic film being adapted to provide lubrication of the rotor, thus reducing friction between the rotor and the stator, and to transmit the axial thrust force of the rotor to the stator.

The invention discloses a system for compensating the combined negative sequence current of a power regulator and a static var compensator. The system consists of a railway power regulator and the static var compensator. The railway power regulator is installed between two power supplying arms at a secondary side of a traction transformer by two single-phase three-winding reducing transformer. Thestatic var compensator consists of two groups of thyristor switched capacitors which are connected in parallel and a group of thyristor controlled reactors. The thyristor switched capacitors and thethyristor controlled reactors are respectively connected with two traction power supplying arms by single-phase three-winding reducing transformers, wherein the thyristor switched capacitors are installed below the single-phase three-winding reducing transformer which is connected with the power supplying arms with relatively advanced voltage phases, and the thyristor controlled reactors are installed below the single-phase three-winding reducing transformer of the power supplying arms with relatively hysteretic voltage phases. The system can maximally reduce the capacity of the railway powerregulator while also satisfying the requirement of a railway system on the unbalancedness degree of three phase current.

The invention relates to a construction method for a classifier. The construction method includes the following steps that a part of majority class training samples in a training sample set are removed through an undersampling method, and a current training sample set is updated through the undersampled training sample set, wherein the training sample set comprises the majority class training samples and minority class training samples, and the classes of all the training samples in the training sample set are known; oversampling is conducted on the minority class training samples in the training sample set, and the classifier is constructed through the oversampled training sample set. According to the construction method for the classifier, noise in the training samples is removed effectively, the problem of data imbalance can be solved effectively, the accuracy rate of training sample data classification is greatly increased, the calculation amount is small, and the method is simple.

The invention discloses a battery pack electricity equalization circuit. The battery pack electricity equalization circuit comprises N-1 battery equalization unit circuits, N voltage sampling circuits, an auxiliary power module, a single-chip microcomputer control module and a driver module, wherein the Kth voltage sampling circuit and the (K+1)th voltage sampling circuit acquire a voltage at two ends of a Kth battery and a voltage at two ends of a (K+1)th battery, and transmit the voltages to the single-chip microcomputer control module; the single-chip microcomputer control module outputs a driver signal to the driver module according to the voltages; the driver signal output by the driver module is transmitted to the Kth battery equalization unit circuit; and the Kth battery equalization unit circuit controls the Kth battery to be discharged and the (K+1)th battery to be charged or controls the Kth battery to be charged and the (K+1)th battery to be discharged, so that electricity equalization of the Kth battery and the (K+1)th battery can be achieved, wherein K is greater than or equal to 1 and less than or equal to N-1. According to the equalization circuit and method, the equalization circuit is simple in structure, high in conversion efficiency, low in cost and high in reliability, and can expand the available capacity of a battery pack and prolong the service life of the battery pack.

A semiconductor integrated circuit having an internal SRAM that includes a plurality of arrayed memory cells, including a first bit line and a second bit line that are connected to first ports and a third bit line and a fourth bit line that are connected to second ports of the memory cells, a first and second transistor respectively compose first ports of adjacent first and second memory cells and having shared impurity diffusion region connected to the first bit line via a first interconnection, a third transistor composing a second port of the first memory cell and having an impurity diffusion region connected to the third bit line via a second interconnection a fourth and fifth transistor respectively composing the first ports of the first and second memory ceils and having a shared impurity diffusion region connected to the second bit line via a third interconnection.

An improved high performance twisted pair data cable having a calculated impedance standard deviation of less than 3.5 at an average impedance of 50 to 200 ohms and a maximum of 90 to 110 ohms. The twisted pair is helically wrapped with metal shielding tape under a certain tension, which provides a shielded twisted pair with a cross-sectional void of less than 25%, preferably less than 18%. The tape is helically wrapped with an overlap of 30-45% and at 35-45 degrees to the longitudinal axis of the cable. This cable has a frequency up to 600MHz.

The invention belongs to the technical field of electric vehicle charging control, and in particular relates to an electric vehicle charging switch device for realizing three-phase load balance and a charging method for an electric vehicle by using the electric vehicle charging switch device. The device comprises a micro-measurement voltage converter, a signal conditioning module, an A / D sampling module, a CPU module, a one-out-of-three interlocking solid-state switch and a charger unit which are in sequence connected; the input end of the micro-measurement voltage converter is connected with a three-phase power supply; the three-phase power supply is a three-phase four-wire system which comprises a phase A, a phase B, a phase C and N wires respectively; the input end of the one-out-of-three interlocking solid-state switch is further connected with the phase A, the phase B and the phase C of the three-phase power supply; the charger unit is connected with the output end of the one-out-of-three interlocking solid-state switch and the N wires of the three-phase power supply respectively; according to the results of A / D conversion, the phase with the highest voltage is selected from the phase A, the phase B and the phase C, and the one-out-of-three interlocking solid-state switch breaks over the phase with the highest voltage to be used as a charging power supply of the electric vehicle to realize the three-phase load balance of a distribution network.

The invention discloses a novel layered equalization circuit. The novel layered equalization circuit is used for balancing a series power battery pack or a series energy storage device. The equalization circuit comprises 2-4 bottom-layer battery modules, wherein each battery module comprises 2-4 single batteries, so that layered and active balancing of 4-16 series batteries can be achieved. The equalization circuit comprises a bottom-layer equalization circuit and a top-layer equalization circuit, wherein the bottom-layer equalization circuit is used for balancing the interiors of the battery modules, and the top-layer equalization circuit is used for balancing among the battery modules. The bottom-layer equalization circuit and the top-layer equalization circuit both employ the same circuit topology based on inductor energy storage, the structure is simple and reliable, and many equalization paths are generated. By the equalization circuit, the unbalanced phenomenon of the series battery pack can be rapidly improved, and the equalization circuit is suitably used for a battery management system of an energy storage device in an electric vehicle or an energy storage power station.

A method and apparatus for increasing the capability of a network topology model having a plurality of nodes connected by existing links to maintain service continuity in the presence of faults. The steps of the method include adding new links to the network topology model to protect against single node failures, and adjusting link weights for the network topology model to reduce at least one of a cost of network operation and an imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the imbalance in link utilizations without deteriorating the cost of network operation. The link weights are preferably adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations. Preferably, the link weights are adjusted to reduce the cost of network operation without increasing the imbalance in link utilizations while keeping the utilization for each link below a specific threshold. In addition, links can be added to the network topology model to reduce the cost of network operation.

The invention discloses a branch-line voltage regulation device with a controller taking voltage as a criterion and a combination switch. The branch-line voltage regulation device comprises a core controller and the combination switch and is characterized in that the core controller carrying out analysis and calculation according to acquired three-phase alternating current voltage and parameters,and simultaneously sends out a control command to a fling-cut switch control module according to an analysis and calculation result to enable the corresponding combination switch to act to regulate the operation of a corresponding capacitor; when a reactive power supply outputs reactive power larger than a reactive load and losses in a network, the core controller controls to alleviate the operation of the capacitor; when the reactive power supply outputs the reactive power smaller than the reactive load and the losses in the network, the core controller controls to enhance the operation of the capacitor; and when the reactive power output by the reactive power supply is balanced with or basically balanced with the reactive load and the losses in the network, the core controller controls the capacitor to maintain the current state without changing. The invention realizes the automatic tracking of the change of input voltage and reasonable regulation on each branch-line voltage.

The invention discloses a motor function evaluation and training system of extraocular muscles and belongs to the technical field of eyesight training. The system comprises a cloud service layer and aclient, wherein the cloud service layer constructs training models according to obtained and stored user eyesight information to make and push customized training schemes to the client; the client isused for executing the training schemes to train the eyes and fully train the eye muscles of the user. (The client provides user interfaces, performs user's extraocular muscle exercise testing, and performs extraocular muscle training according to cloud training schemes.) By designing a personalized and scientific evaluation and training program for the extraocular muscle motor capability, the present invention can train the user's eyesight, promote eye blood circulation, improve the state of eye muscle imbalance, balance the retinal stimulation and strengthen the optic nerve activity to alleviate the spasm of ciliary muscle and extraocular muscle, and realize myopia prevention and recovery.

The present invention discloses a bidirectional lossless equalization circuit of a series battery pack based on inductive energy storage, wherein, the series battery pack is divided into an upper part and a lower part, the upper half part battery is an upper battery pack, and the lower half part battery is a lower battery pack. Each battery connects an equalization branch circuit, a total equalization branch circuit bestrides and connects a power supply and the earth, and each equalization branch circuit connects a control circuit. The circuit can realize a dynamic equalization during the charge-discharge process of the battery pack, improve a non-equalization phenomenon of the series battery pack, improve an available capacity of the battery pack, reduce a repairing and replacing cycle of the series battery pack, and prolong a service life of the battery pack by controlling the on and off of an upper bridge and a low bridge MOSFET in the equalization branch circuit and the inductive energy storage. Thus, the circuit is suitable for a battery management system of an energy storage device of a hybrid electric vehicle, a pure electric vehicle, or a storage power station.

A stepping motor for generating vibration is provided and includes a stator and a rotor. The rotor includes a shaft, a ring magnet and a rotor frame, and the rotor frame is formed into a substantial cup-shape including a disk portion having an opening at the center and also including a cylindrical portion continuously arranged at the periphery of the disk portion, and a weight portion is arranged in a portion of the rotor frame so that the gravity center of the rotor frame an be located at a position eccentric with respect to the center of the rotor frame.

The invention discloses a non-equilibrium plasma generator and a granular powder surface modification treatment system. The non-equilibrium plasma generator comprises a cavity body, a shielding mesh and a high voltage electrode unit and a low voltage electrode which are both arranged in the cavity body, wherein the high voltage electrode unit is arranged on the lower surface of a high voltage electrode insulation cover plate, and comprises high voltage line electrodes in the distribution of a plurality of uniform arrays, and first through holes in the distribution of a plurality of uniform arrays are arranged on the high voltage electrode insulation cover plate; one end of each high voltage line electrode is fixed to one end of a high voltage electrode down-lead; the other end of the high voltage line electrode is fixed by a high voltage electrode fixing bolt, and the other end of the high voltage electrode down-lead is led out through the first through hole; all the high voltage electrode down-leads are connected and then used as the impulse high voltage input end of the non-equilibrium plasma generator. The non-equilibrium plasma generator and the granular powder surface modification treatment system adopt high voltage nanosecond repeat frequency impulse to directly drive non-equilibrium plasmas in the air under the atmospheric pressure, the discharge peak current density is larger, the efficiency of generating active particles is better, and the non equilibrium of plasmas is higher.

The invention provides a multiple primitive color printing color value correcting method. In the method, a color value zone is set on a printing material, a secondary primitive color generated by combining main primitive colors and corresponding primitive colors are overprinted according to a predetermined percentage to form a neutral grey scale of combination of the main primitive colors and the secondary primitive color; in a set color value zone, a black 'K' halftone is used as reference to compare a monochromatic grey scale and the neutral grey scale so as to correct the color value and control color changes. By utilizing WKTone neutral grey balance principle and adopting a visual technology, an operator can accurately control color ink usage comparison, and color reading equipment can read color value changes to correct colors in real time. The method can be used for surmounting three-color sampling, and used for large-scale production and printing.

The invention discloses a method for restraining total output active power fluctuation of a double-fed wind power system through a series-connection network side converter under an unbalanced and harmonic distortion network voltage and relates to the field of control over series connection network side converters, parallel connection network side converters and motor side converters. A voltage controller adopted for the series connection network side converter can be used for rapidly restraining stator negative-sequence harmonic voltage components, five-time harmonic voltage components and seven-time harmonic voltage components and safe and stable operation of an electric generator is guaranteed. A reference current order of a parallel connection network side converter comprises fundamental harmonic positive-sequence current components, fundamental harmonic negative-sequence current components, five-time harmonic current components and seven-time harmonic components under a forward-direction synchronous revolution coordinate system. A current controller adopted for the parallel connection network side converter can simultaneously, accurately and rapidly adjust direct components, second harmonic generation alternating components and sixth harmonic generation alternating components. Total output active power second harmonic generation fluctuation and sixth harmonic generation fluctuation of the system can be guaranteed and the electric energy quality and stability of a power grid connected to the double-fed sensing wind power system are effectively improved.

The invention discloses a series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage. At least three battery single bodies are connected in series, at most seven battery single bodies are connected in series, a series connection battery pack is divided into an upper portion and a lower portion, the connection point of the upper portion and the lower portion is N, the upper portion includes battery single bodies from the positive end of the series connection battery pack to the connection point N, the lower portion includes the battery single bodies from the connection point N to the negative end of the series connection battery pack, m is an odd number, n is an even number larger than or equal to 2, m=n-1 or m=n+1, and m <=7. An equalization sub circuit connected with odd batteries is an odd equalization circuit, and an equalization sub circuit connected with even batteries is an even equalization circuit. By means of the circuit, overcharging and overdischarging are avoided in the charging and discharging process, the series connection battery pack unequalization is avoided, the battery pack available capacity is improved, the maintenance and replacement period of the series connection battery pack is reduced, the service life of the battery pack is prolonged, and the cost of hybrid electric vehicles, electric automobiles and energy storage power stations is reduced.

The invention belongs to the technical field of a semiconductor, in particular relates to a junction terminal structure of a transverse high-voltage power device. In the structure, the inner wall of an N-type shift region 2 and the inner wall of a P-type buried layer 9 in a curvature junction terminal structure respectively extend to the middle until to be connected with the inner wall of an N-type shift region 2 and the inner wall of a P-type buried layer 9 in a direct junction terminal structure, included angles of Alpha degrees are generated between the extension directions and the vertical directions of the inner walls of the N-type shift region 2 and the P-type buried layer 9 in the direct junction terminal structure, and the Alpha degrees is 45 degrees. By the junction terminal structure, the curvature effect of an electric field at a connection part can be effectively relieved; and on the vertical direction of the extension direction at the connection part, the distance of the P-type buried layer 9 exceeding the N-type shift region is 5 micrometers, and thus, the problem of charge unbalance is solved. The junction terminal structure has the advantages that the problems of charge unbalance in the connection part between the direct junction terminal structure and the curvature junction terminal structure and the curvature effect of the electric field at the connection part are solved, a device is prevented from being broken down in advance, and thus, optimal breakdown voltage is obtained.

The invention relates to a method for realizing broadcast channel covering by an antenna array, which is used in a smart antenna system, the method includes the following steps that: step 1. according to the coverage condition of communities / sectors, the steering of the antenna array broadcast beam and the half power width of the broadcast beam are calculated; step 2. the broadcast beam steering is takn as a center, N sub-beams (N is a natural number) with symmetric steering are set up according to the calculation results; step 3. on the basis of the interval of transmission time or the integral multiple of the transmission time, broadcasting channel information is emitted by adopting the N sub-beams. The invention can acquire higher beam gain, modify the disequilibrium of the coverage area for broadcast channels and dedicated channels, and promote the network performance of the system.

The invention discloses a non-polar patterned AlN / sapphire composite substrate and a manufacturing method thereof. The structure thereof comprises a r-plane patterned sapphire substrate, a sapphire pattern, a mask layer and an AlN covering layer. The sapphire pattern is a part of the r-plane patterned sapphire substrate, and is an asymmetric conical or pyramidal structure, that is, inclines towarda [1101] crystal orientation. The structure can effectively solve a problem that crystal quality is difficult to improve since growth rates along different directions are different during epitaxial growth of non-polar III-nitride. The AlN covering layer is formed by direct reaction with NH3 while the sapphire substrate is decomposed under high temperature in an NH3 atmosphere. The composite substrate provided by the invention can effectively reduce combination of O-containing impurities in an epitaxial growth process of the III-nitride, and can also obtain a dense high-quality non-polarity AlN covering layer on the surface of the sapphire substrate on the premise of not consuming an Al source, and has important significance on growing the high-quality non-polar III-nitrides and related devices on the substrate.

The invention discloses a transformer fault type diagnosis method based on a semi-supervised DBNC (deep belief network classifier). The method comprises the following steps: selecting a sample data set; dividing sample data into an unlabelled pre-training set, a labelled set, a test set 1 and a test set 2; performing state coding on a fault type; building a DBNC-based transformer fault diagnosis model; initializing parameters of each layer of the model; training each RBM at the bottom layer by layer by utilizing comparison divergence; optimizing the whole network parameter through back propogation, so as to enable network classification performance to be globally optimal; and storing a trained network, and verifying classification performance of a network by utilizing sample data of the test set 1. The method disclosed by the invention solves the problems that only a small amount of complete data samples can be obtained under normal conditions when deep learning network fault data is adopted for performing analysis and processing in transformer fault diagnosis, a large number of labelled complete data samples are very difficult to acquire and a large amount of manpower and resources are required.

The invention relates to a human body daily behavior activity recognition optimization method based on a stacked noise reduction auto-encoder, which comprises the following steps: 1) based on a deep learning method and an SDAE model, constructing a classification model of human body behavior recognition by adopting human body behavior data acquired from a wearable sensor; 2) initializing a classification model for the data collected by the wearable sensor, and dividing the initialized data into a training set, a test set and a verification set; 3) carrying out pre-training and fine tuning processing on the constructed classification model; and 4) verifying the generalization ability of the trained classification model by using the verification set in a cross verification mode, and inputting the test set into the classification model to obtain the corresponding prediction category. Compared with the prior art, the method has the advantages that a more accurate model identification result is obtained, more directions can be provided for the application of behavior identification, and the like.