113results about How to "Reduce loss value" patented technology

The invention relates to a soft magnetic core used for a high-power inverter power supply, and a manufacturing method thereof. The magnetic core is made of an Fe-based amorphous nano-crystalline belt material through winding , and comprises components according to weight percentages as follows: 81%-85% of Fe, 0.01%-5% of Co, 7%-9% of Si, 1.5%-2.5% of B, 1%-2% of Cu, 4%-7% of M, and 0.001%-0.04% of M', wherein M is one or more of Nb, Mo, V, W and Ta, and M' is at least one of Al and Ti. The magnetic core is subjected to anneal in a protective atmosphere or a vacuum; when in anneal, the position of the magnetic core in a furnace is movable or rotatable, a holding temperature is 520-600 DEG C, the holding time is 1-2 hours, and a temperature rise speed is 100 DEG C per hour. The magnetic core manufactured by adopting the method has lower loss, better manufacturing technique properties, and good soft magnetic characteristics; moreover, the downstream processing after the heat treatment is applicable to various technique methods.

The invention relates to high-saturation flux density composite magnetic powder. The high-saturation flux density composite magnetic powder is prepared from powder A and powder B, wherein the proportion is as follows: 5-95wt% of powder A and 5-95wt% of powder B, the powder A is at least one of iron silicon powder, pure iron powder, iron silicon aluminum power, iron nickel powder, iron nickel molybdenum powder and iron cobalt alloy powder, the powder B is at least one of iron-based amorphous alloy powder, iron-based nanocrystal alloy powder, iron-nickel-based amorphous alloy powder, iron-cobalt-based amorphous alloy powder and iron-cobalt-based nanocrystal alloy powder, and the grain sizes of the powder A and the powder B are 8-200 micrometers. A magnetic core prepared by employing the composite magnetic powder has the characteristics of high Bs, low loss, low cost and the like and is suitable for mass production, the Bs value is 1.71T or above, the loss is not higher than 50W/kg under 1.5T and 1,000Hz, and the magnetic core particularly and suitably works in a medium- and low-frequency range (50Hz-10kHz).

The invention discloses a manufacturing method for a full optical fiber high-pressure gas chamber based on a hollow-core photon crystal fiber. The steps of the invention are as follows: a) two ends of a hollow-core photon crystal fiber (1) are respectively communicated with an airtight A chamber (2) and an airtight B chamber (3), and one end of gas distribution equipment (4) is communicated with the airtight B chamber (3), and the other end of the gas distribution equipment (4) is respectively connected with a vacuum pump (5) and a gas source (6) to be inflated; b) the airtight B chamber (3) is connected with the vacuum pump (5) through the gas distribution equipment (4) first, after the required vacuum degree is achieved, the airtight B chamber (3) is connected with the gas source (6) to be inflated again through the gas distribution equipment (4) until air pressure of the airtight A chamber (2) is more than or equal to one atmospheric pressure; c)the two ends of the hollow-core photon crystal fiber (1) are successively welded with a standard single film fiber (10) within a range of less than or equal to 1.5 min; d) a distillation function p(x) of air pressure of a fiber core in the hollow-core photon crystal fiber (1) is derived from a formula p(x)=p(1)(-c+a2-bx); e) a final air pressure value of the full optical fiber high-pressure gas chamber is calculated by more than one p(x). The p(x) can accurately determine the air pressure value of the full optical fiber high-pressure gas chamber.

The invention discloses an industrial production process target data prediction method of a multi-feature fusion deep neural network. Collecting other variable time sequence data related to the key variable in the industrial equipment through equal-interval sampling by utilizing a sensor, and performing predictive analysis on the time sequence data of the key variable in the process industry; inputting into a pre-designed and pre-constructed deep convolutional neural network for training; segmenting historical data of the key variables according to time steps and then inputting the segmented historical data into a deep gated recurrent neural network for learning; a multi-feature fusion method is utilized to fuse output features obtained by two networks and then input the output features into a full connection layer, network parameters are optimized through back propagation, and prediction precision is improved. According to the method, reliable and effective target variable parameter prediction is provided for process monitoring in industrial production, and the hysteresis quality of measurement of key variables such as the silicon content of molten iron in industrial production isrelieved.

This invention refers to a hydraulic or pneumatic machine with tilting blades, running either as an engine on a fluid flow or on pressure fluid or as a pump or a compressor. The hydraulic or pneumatic machine on a fluid flow according to the invention consists of a cylindrical casing with inlet and outlet openings, radially arranged, diametrically oposed, along the fluid flowing direction, some disk like rotors with tilting blades, hinged over their front faces and provided with driving mechanisms of their own, and some fixed drums located between the rotors, concentrically to them, making inside the machine some channels, symetrically arranged on one or several stages. Flowing through the channels, the fluid drives the tilting blades causing the movement of the rotors, all the rotors moving to one sense being coupled to the same outlet shaft of the machine. The tilting blades of the hydraulic or pneumatic machine operating according to the invention with pressure fluid, run in variable depth grooves located in the rings between the front faces of the rotors and connected to the fluid circuit, the operation conditions of the machine—motor or pump—being determined by the moving sense of the blade in the groove.

The invention discloses a method for identifying the grade of wood for a Chinese zither panel through the near infrared spectrum based on a neural network. The method comprises the steps of: (1), performing Savitzky-Golay convolution smoothing, first-order derivative pre-processing and principal component analysis on near infrared spectrum data including the wood for the Chinese zither panel in different grades; (2), constructing an improved BP neural network model; (3), training the improved BP neural network model; and (4), classifying the near infrared spectrum data of the wood for the Chinese zither panel by utilizing the trained improved BP neural network model, so that grade identification of the wood for the Chinese zither panel is realized. According to the method in the invention,judgement is carried out based on the near infrared spectrum data covering chemical substances of the wood for the Chinese zither panel in different grades; data measurement is rapid; the cost is low; the judgement time is short; the calculation data volume is effectively reduced; the subjective assume is not doped; the stability is relatively high; and the method is relatively robust.

The invention provides a single-mode optical fiber. The single-mode optical fiber includes a core layer and a cladding layer, the outer side of the core layer is provided with the cladding layer, thecladding layer includes a first cladding layer and a second cladding layer, the inner side of the first cladding layer is connected with the outside of the core layer, and the outer side of the firstcladding layer is connected with the inner side of the second cladding layer; and the invention further provides a manufacturing method of the single-mode optical fiber, the manufacturing method includes the following steps that step 1) powder-like loose bodies are prepared; step 2) the powder-like loose bodies are treated; step 3) fiber prefabrication rods are manufactured; step 4) the fiber prefabrication rods are treated; and step 5) wiredrawing is conducted. The single-mode optical fiber and the manufacturing method thereof have the beneficial effects that multiple variable scan be adjusted in the aspects of fiber design and manufacturing, the multiple variables are correspondingly a core layer diameter r1, the first cladding layer diameter r2 and refractive index difference valves [delta] 1, [delta] 2, [delta] 3 and [delta] 4, by changing the valves, the internal stress in fiber wiredrawing is reduced advantageously, Rayleigh scattering of the fiber is reduced, and loss valves ofthe fiber are further decreased as a whole.

A method of manufacturing a chip capacitor according to an aspect of the invention may include: preparing a capacitor lamination including a dielectric sheet formed of a composite having ceramic powder and a polymer mixed with each other, and first and second internal electrodes formed on both surfaces of the dielectric sheet at predetermined intervals; forming covering layers formed of an insulating material on both surfaces of the capacitor lamination; forming at least one first opening and at least one second opening in the capacitor lamination having the covering layers formed thereon to expose the first and second internal electrodes, respectively; forming plating layers in the first and second openings, the plating layers connected to the first and second internal electrodes; and dicing the result into chips on the basis of the first and second openings so that the plating layers formed in the first and second openings are provided as first and second external terminals.

The invention relates to a covered wire cold connector, which comprises a first plug core cavity and a second plug core cavity, wherein a first plug core tail handle is arranged in the first plug core cavity; one end of the first plug core tail handle is provided with a first plug core, while the other end is provided with a first slot; the first plug core is extended into a connecting pipe corresponding to the other end connected with the first plug core tail handle; the connecting pipe is provided with a second plug core corresponding to the other end provided with the first plug core; the second plug core is provided with a second plug core tail handle corresponding to the other end embedded in the connecting pipe; the second plug core tail handle is provided with a second slot corresponding to the other end provided with the second plug core and penetrates into a second plug core cavity; an optical fiber matching fluid corresponding to the end part of the first plug core is arranged in the connecting pipe and surrounds the end part of the first plug core; and the connecting pipe is provided with a vent hole corresponding to a side wall provided with the optical fiber matching fluid. The covered wire cold connector has the advantages of simple structure, convenient operation, low splice loss, high stability and high reliability.

A mobile terminal and a global positioning system calibration method are disclosed in the invention. The mobile terminal includes: a GPS parameter calibration module (10), which is configured to calibrate GPS parameters based on at least one of the following items: data from a GPS signal feedback and collection module (20), state parameters of the mobile terminal, and environmental parameters of the mobile terminal; the GPS signal feedback and collection module (20), which is configured to acquire the GPS parameters before and after the calibration implemented by the GPS parameter calibration module (10) and feed back the collected data to the GPS parameter calibration module (10). The GPS calibration function of the mobile terminal is enhanced with the invention.

The invention relates to an optical fiber contact element, in particular to a photoelectric hybrid separation off connector. A floating optical fiber jack module comprises a jack fixing sleeve (19), alocation spring (21), an optical fiber jack part (22) and a jack guiding shaft (20), the jack guiding shaft (20) is of a hollow structure, the optical fiber jack part (22) is arranged in the jack guiding shaft (20), the location spring (21) sheathes the optical fiber jack part (22), one end of the location spring (21) tightly leans on the outer surface of the optical fiber jack part (22), the other end of the location spring (21) tightly leans on the inner wall of the jack guiding shaft (20), and the optical fiber jack part (22) can move and compress the location spring (21) in the axial direction; and a part of the jack guiding shaft (20) is contained in the jack fixing sleeve (19), a part of the jack guiding shaft (20) penetrates out the jack fixing sleeve (19), and the effect that thejack guiding shaft (20) can not penetrate out the jack fixing sleeve (19) is guaranteed by virtue of a limit structure. The photoelectric hybrid separation off connector provided by the invention realizes optical fiber transmission of the optical fiber contact element with long insertion and extraction life and low optical loss.

The invention relates to a text viewpoint mining method and system. The method comprises the steps of obtaining a to-be-mined text; carrying out preliminary screening of viewpoint statements on the to-be-mined text; according to the screened text to be mined, adopting a Fast Text-XG Boost model to carry out viewpoint statement recognition; according to the recognized viewpoint statement, adoptingan MTL-BiLSTM-CRFs model to perform viewpoint mining with annotation of the evaluation object and the evaluation word as a main task and part-of-speech annotation as an auxiliary task. According to the text viewpoint mining method and system provided by the invention, the mining efficiency and accuracy of the text viewpoints are improved.

The invention discloses an image recognition method based on an improved Focal loss function, and the method comprises the steps: improving a modulation factor of the Focal loss function on the basis of an existing Focal loss function, enabling the function to have higher attention to a difficult sample, and enabling the function to have relatively lower attention to a simple sample; and then, on the basis of the convolutional neural network model based on the Focal loss function, predicting the residual negative sample set, screening all difficult samples, dividing the samples into N equal parts, respectively adding the N equal parts into the original training set to form N new training sets, then training a plurality of models, and determining a final prediction picture label result according to voting selection of the N models. According to the method, on the basis of an original Focal loss function, the attention degree on a difficult sample is higher, and the model generalization ability is improved; and under the condition of excessive negative samples, difficult samples are screened out by utilizing the original model and added into the training set, so that the accuracy of the model is improved, available samples are fully utilized, and the calculation amount during model training is also reduced.

In a method for producing a grain-oriented electrical steel sheet by comprising a series of steps of hot rolling a raw steel material comprising C: 0.002-0.10 mass %, Si: 2.0-8.0 mass %, and Mn: 0.005-1.0 mass %, subjecting the steel sheet to a hot band annealing as required, cold rolling to obtain a cold rolled sheet having a final sheet thickness, subjecting the steel sheet to primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to final annealing, rapid heating is performed at a rate of not less than 50° C./s in a region of 200-700° C. in the heating process of the primary recrystallization annealing, and the steel sheet is held at any temperature of 250-600° C. in the above region for 1-10 seconds, while a soaking process of the primary recrystallization annealing is controlled to a temperature range of 750-900° C., a time of 90-180 seconds and P_H2O/P_H2 in an atmosphere of 0.25-0.40, whereby a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value is obtained.

The invention belongs to the technical field of novel metal and alloy materials in new materials, and in particular relates to a polycrystalline silver platinum alloy plasma thin-film material and a preparation method thereof. The general formula of the thin-film material is Ag1-xPtx, wherein x represents the atomic percent of Pt in alloy and ranges 4-25%, and the thickness of the thin-film material is 50-200 nanometers. The polycrystalline silver platinum alloy plasma thin-film material is prepared by a magnetron sputtering technique, a utilized sputtering target is a composite target which has the same components as the silver platinum alloy plasma thin-film material to be sputtered, sputtering gas is argon, one-four pure platinum wafers are respectively arranged on a pure silver substrate target, the ratio of the total sputtering area of the pure platinum wafers to the sputtering silver target is 0.04-0.16, and the loss of the alloy thin-film material can be remarkably reduced through a suitable annealing treatment. The preparation method disclosed by the invention is simple, the raw materials are easy to obtain, and the cost is relatively lower; and the plasma property of the thin-film material disclosed by the invention is better than that of common metal, such as copper and gold, in a visible light frequency range and even is close to that of metal silver in some special areas so that the polycrystalline silver platinum alloy plasma thin-film material is an excellent plasma low-loss substrate.

The invention discloses a high specific capacitance capacitor cathode foil. The foil possesses an aluminum foil. A surface of the aluminum foil is sputtered with a titanium nitride layer. A surface of the titanium nitride layer is sputtered with a mixing layer of titanium nitride and graphite. By using the high specific capacitance capacitor cathode foil, an experiment shows that the titanium nitride layer and the aluminum foil surface are combined firmly; the mixing layer of the titanium nitride and the graphite and the titanium nitride layer are combined firmly; as the cathode foil, an electric capacity reaches several times of the electric capacity of the aluminum foil and is higher than a carbon foil; the cathode foil possesses lower impedance and losses than the aluminum foil and is especially suitable for making a solid state capacitor and a large capacity electrolytic capacitor. The cathode foil possesses characteristics of a small size, a long service life and good heat stability. The invention simultaneously discloses a film coating apparatus manufacturing the high specific capacitance capacitor cathode foil. The apparatus mainly comprises a vacuum unreeling chamber, a first vacuum film coating chamber, a second vacuum film coating chamber and a vacuum rolling chamber. By using the film coating apparatus, from an unreeling process to a rolling process, continuous film coating can be realized, a film coating speed is fast and production efficiency is high.

The invention relates to the technical field of transformers, in particular to an intelligent power transformer having resonance elimination and monitoring functions. The intelligent power transformer includes a housing provided with an oil outlet and an installation plate, a coil arranged in the housing, an oil conservator arranged on the housing and used for supplying cooling oil to the coil, an iron core made of amorphous alloy materials, a resonance elimination coil arranged on the iron core and used for monitoring and regulating the magnetic flow change in the iron core, and a controlling device arranged on the intelligent power transformer or detachably arranged on a working platform and used for monitoring and remotely controlling the coil and the resonance elimination coil. The intelligent power transformer has the advantages that amorphous alloy cores are adopted, the electric energy transmission loss value is reduced, and energy conservation and environment protection are achieved; by the arrangement of the magnetic flow change monitoring and resonance elimination coil, waveform distortion is prevented, and power distribution is affected; by arranging a monitor and a sensor in the controlling device, remote operation of components in a circuit and monitoring of working states of all the components are achieved, and the power transformer is more intelligent, automated and integrated.