249results about How to "Low balance" patented technology

The invention provides a wireless communication device for receiving a package constituted by signal modulated by OFDM. A band-pass filter pick up OFDM signal of desired frequency band. The desired OFDM signal is amplified by low-pass amplifier based on the gain controlled by the received signal intensity. A frequency converter down-converses the FDM signal into baseband signal. An A / D converter converses the baseband signal into digital signal. A first high pass filter removes DC deviation from baseband signal corresponding to preset preamble of the package. A frequency shift etimator estimates frequency shift from the sampled signal which has removed DC deviation from baseband signal by the first high pass filter. A frequency shift corrector removes the estimated frequency shift from the baseband signal. A demodulator demodulates the subcarrier signal in the frequency domain from baseband signal which is compensated with frequency shift.

A palletizing robot includes a lifting frame, an end-effector, an extensible mechanical arm, and a balancing mechanism. The extensible mechanical arm is rotatably connected to the lifting frame. The balancing mechanism and the end-effector are located on opposite ends of the extensible mechanical arm. The balancing mechanism includes a threaded rod, a sliding member, a driving member, and a counterweight. The threaded rod is located on the extensible mechanical arm. The sliding member receives the threaded rod. The driving member is fixed on an end of the threaded rod. The counterweight is fixed on the sliding member. The driving member rotates the threaded rod such that the sliding member slides relative to the threaded rod.

The invention discloses a MOSFET of a super-junction trench having a function of reducing surface electric-field stepped oxide and a split grid structure. The inventive structure can apply additional freedom for better optimization and manufacturing capability by tuning thick oxide thickness to minimize influence of charge imbalance, trapped charges, etc. . . . . Furthermore, the fabrication method can be implemented more reliably with lower cost.

The invention discloses an activity enhancer for shrimps, crabs and fish in aquaculture and a preparation method thereof. The enhancer comprises the following components in parts by weight: 15-20 parts of calcium gluconate, 25-35 parts of light calcium carbonate, 15-25 parts of calcium hydrophosphate, 20-30 parts of natural anti-stress factor, 10-15 parts of amino acid and 5-10 parts of sodium percarbonate; and the natural anti-stress factor comprises the following components in parts by weight: 13-18 parts of manyprickle acathopanax root, 12-15 parts of indigo woad root, 9-12 parts of baical skullcap root, 9-12 parts of cape jasmine fruit, 7-10 parts of artemtsm, 6-8 parts of Chinese angelica, 6-8 parts of raidx astragali, 4-7 parts of rheum officinale, 4-7 parts of campanumaea pilosula, 6-9 parts of salvia miltiorrhiza bunge, 5-7 parts of tree peony bark and 5-8 parts of uncaria. The preparation method comprises the following steps: adding the raw materials into a reaction kettle for stirring and mixing; heating the reaction kettle, standing and curing to obtain a finished product; and the natural anti-stress factor is prepared by crushing the materials into powder. The invention provides an ecological preparation with high nutrition, no antibiotic and no harmful chemicals for shrimps, crabs and fish.

A sealing method between two elements, including the following steps:producing a first sealing material on a face of a first of said two elements,producing a second sealing material, different from the first sealing material, on one face of a second of said two elements,securing said two elements by thermocompression of the sealing materials against each other at a temperature Tc below the melting temperatures of the first and second sealing materials,wherein the first and second sealing materials are chosen such that they each have at least one phase able to react with the phase of the other sealing material by interdiffusion of the components of the phases of the sealing materials during the securing step and forming at least one other solid phase having a melting temperature above the temperature Tc.

The present invention relates to an axial flow fan, and an object thereof is to make it capable of promoting structural stability so as to decrease deformation and unbalance of a blade as well as accomplishing low noise level by determining a distribution angle of the blade with an optimum clearance angle and thereby determining uneven rate of the blade.

The invention provides an ultra-wideband frequency mixer. The ultra-wideband frequency mixer comprises transition sections from a broadside coupling balun and a broadside coupling strip line of a local oscillator channel to a plane transmitting line, a coplanar waveguide of a radiofrequency channel, a medium frequency output channel and a frequency mixing diode pair, wherein the frequency of a local oscillator signal and the frequency of a radio frequency signal are mixed by input frequency mixing diodes of the local isolator channel and input frequency mixing diodes of the radiofrequency channel respectively; generated medium signals are outputted via the medium frequency output channel; the broadside coupling balun is used for converting unbalanced ultra-wideband local isolator signals into balanced ultra-wideband local isolator signals; after the balanced local isolator signals are converted into input frequency mixing diodes of the plane transmitting line via the transition section, generated medium signals step across the coplanar waveguide by using a gold wire inductor and then are outputted via a microstrip line. By using the scheme, the working frequency can cover an ultra-wide frequency range of 0.01GHz-110GHz; the ultra-wideband frequency mixer can work in a fundamental wave frequency mixing mode in a frequency range of 0.01GHz-70GHz, and the frequency conversion loss and a noise coefficient index can be lower than 12dB; and the ultra-wideband frequency mixer can work in a frequency range of 70GHz-110GHZ in a triple frequency harmonic frequency mixing mode, and the frequency conversion loss and the noise coefficient index can be lower than 30dB.

The invention relates to the technical field of vacuum pumps, and in particular relates to a roots vacuum pump. The vacuum pump comprises a motor, front and back bearing cavities, a roots cavity and a gear cavity, wherein the front and back bearing cavities are located at the both sides of the roots cavity, and the gear cavity is connected with the back bearing cavity; the roots cavity is provided with an air inlet and an air outlet and is internally provided with a driving rotor shaft and a driven rotor shaft; the driving rotor shaft and the driven rotor shaft are respectively and correspondingly provided with a roots driving rotor and a roots driven rotor; one end of the driving rotor shaft is connected with the motor, and the other end of the driving rotor shaft is provided with a driving gear; one end of the driven motor shaft is provided with a driven gear which is in transmission connection with the driving gear and accommodated in a gear box; and the front bearing cavity and the back bearing cavity are internally provided with bearings and bearing support rings which are sleeved and fixed at the both ends of the driving rotor shaft and the driven rotor shaft. The roots vacuum pump has the advantages of being small in size, high in pumping speed, energy-saving, space-saving, and applicable to IC equipment.

The invention discloses an activity-enhanced algae microorganism fertilizer and a preparation method thereof. The microorganism fertilizer breaks through the structure of a conventional fertilizer, algae fermentation liquor is taken as a synergistic ingredient, and microorganisms are added, and the microorganism fertilizer is finally processed in a scientific manner. The algae fermentation liquor not only can be used as a synergist to promote nutrient absorption of plants, but also can play roles of controlled release and coating on nutrients, provides a safer growth environment for crops, and promotes stable yield, high yield and high quality of the crops. Microbial flora can degrade nutrients in soil, promote crop absorption, and improve the soil structure.

The invention relates to a voltage equalization circuit for a series super capacitor bank, which is connected in parallel at two ends of each monolithic super capacitor in the series super capacitor bank. A first leading-out terminal of the voltage equalization circuit is connected with external signals (600), a second leading-out terminal is connected with the positive terminal of a monolithic super capacitor of the series super capacitor bank, and a leading-out terminal is connected with the negative terminal of the monolithic super capacitor. When the voltage deviation of a super capacitor monomer caused by long-time operation needs to be eliminated, the voltage equalization circuit is enabled through the external signals; if the voltage of the super capacitor monomer is larger than the set value of voltage of the voltage equalization circuit, the discharge is carried out; and then, an external charge and discharge circuit is controlled to carry out corresponding charge and discharge actions, so that after a period of time, the voltage of any super capacitor monomer is equal to the set value of the voltage equalization circuit, thereby achieving the purpose of eliminating the historical accumulated voltage deviation of the super capacitor monomer.

The invention discloses a three-phase electric energy meter based on wide-area synchronous measurement. The three-phase electric energy meter comprises a central processor, a synchronous measurement electric energy metering module, a memory, a constant temperature crystal oscillator and a clock chip, and the synchronous measurement electric energy metering module, the memory, the constant temperature crystal oscillator and the clock chip are connected with the central processor; the central processor is used for externally being connected with a clock synchronization system, a second pulse of which is a benchmark, or an IEEE 1588 protocol clock system and for checking and keeping the time with the clock system, and the central processor is also used for sending an automatic synchronization sampling command to the synchronous measurement electric energy metering module and processing sampled data; the synchronous measurement electric energy metering module is used for metering electric energy and for synchronously collecting a plurality of continuous voltage current instantaneous data of each path in a whole net and storing the continuous voltage current instantaneous data; the memory is used for storing data processed by the central processor; the constant temperature crystal oscillator is used for cooperation with the central processor to carry out time keeping; and the clock chip is used for providing a work clock for the central processor. The invention further discloses a measurement method of the three-phase electric energy meter based on the wide-area synchronous measurement. Instantaneous values of electrical parameters can be synchronously measured, and requirements of the wide area measurement can be met.

The invention relates to a dynamic demand response method under the condition of large-scale electric vehicle access, which includes the following steps: (1) making big data clustering analysis according to the information obtained from an electric vehicle electricity consumption information big data platform of electric vehicle charging and battery swapping under the condition of large-scale access to form a load characteristic curve based on electric vehicle charging and battery swapping; (2) establishing an electric vehicle dynamic demand response model of large-scale access; and (3) solving the model by a particle swarm optimization algorithm to obtain a demand response strategy of power supply enterprises. The household electric vehicle orderly charging strategy under multiple objectives of the invention well takes into account the balance between user expenditure reduction and system load fluctuation reduction, has good economic benefits for both the user side and the grid side,and can achieve mutual benefit and win-win between the user and the grid.

The embodiment of the invention provides a stator module and a driving motor. The stator module comprises a stator core and M-phase stator windings. The inner periphery of the stator core is providedwith a plurality of axially arranged slots, the M-phase stator windings are formed by employing flat wires, the M-phase stator windings are wound into L layers in the slots, M is a positive integer, Lis an even number which is greater than or equal to 6, each phase of stator windings in the M-phase stator windings comprises at least two sets of sub-windings which are connected in parallel, and each set of sub-windings comprises a plurality of coils which are connected in series; a plurality of coils of at least one set of sub-windings of each phase of stator winding are distributed in L different layers of the slots. According to the embodiment of the invention, it is ensured that the back electromotive force, the resistance and the inductance of each parallel sub-winding are approximately the same to greatly reduce the unbalance rates of the resistance, the inductance and the current of each parallel branch of each phase of stator windings, thereby reducing the additional copper consumption caused by circulation.

The invention discloses an enclosing type deepwater platform construction method base on the condition of a sand backfilling balance method. The enclosing type deepwater platform construction method is characterized in that firstly, cofferdams of construction steel sheet piles are formed on the river bed surface, back covering concrete layers are formed in the cofferdams through underwater pouring, and sandy soil of which the height is greater than that of the back covering concrete layers of the outer sides of the cofferdams is sucked to the interior of the steel sheet cofferdams through dredging tubes so that height difference of sandy soil of the inner side of the steel sheet cofferdams and the outer side of the steel sheet cofferdams is reduced; water is extracted gradually in the steel sheet cofferdams and inner supports are installed sequentially, and temporarily stored sandy soil is hoisted out of the cofferdams so that surface layers of the back covering concrete layers are exposed; platform templates are arranged on the back covering concrete layers, and a platform template supporting system is formed by installing I-shaped steel between the steel sheet piles and the platform templates; and first layer platform concrete, concrete top beams and second layer platform concrete are poured in the platform templates in sequence, and sandy soil is backfilled between the steel sheet piles and the platform templates at the same time and the construction of platform concrete is completed. According to the enclosing type deepwater platform construction method, cofferdam platform is easy to construct on abrupt slope or deepwater sandy riverbed.

The present invention discloses a 0.2S-class three-phase power meter based on wide-range synchronous measurement. The power meter comprises a central processing unit, an analog-digital converter, and a field-programmable gate array, a digital signal processor, a storage, a constant-temperature crystal oscillator and a clock chip which are connected with the central processing unit, the field-programmable gate array is connected with the digital signal processor, the field-programmable gate array and the digital signal processor are connected with the analog-digital converter, and the central processing unit is configured to externally connect with the clock synchronizing system taking the pulse per second as the standard or the IEEE 1588 protocol clock system of an intelligent substation. The present invention further discloses a method for measurement of a traditional transformer substation and an intelligent substation through adoption of the 0.2S-class three-phase power meter based on the wide-range synchronous measurement. The 0.2S-class three-phase power meter based on wide-range synchronous measurement and the measurement method thereof can perform synchronous measurement of instantaneous values of electrical parameters to satisfy requirements of wide-range measurement.

The invention discloses a naive Bayes data processing system and method based on minority-class sample synthesis. The system includes a medical information database, a data preprocessing module and adata analysis module which are connected through network equipment, wherein the medical information database is used for storing medical information data packets; the data preprocessing module is usedfor performing vacant value filling of data, and the data analysis module includes a data balance compression module, a Wrapper feature selection module and a naive Bayes analysis and prediction module which perform communication connection through a data bus and perform missing filling, smoothing processing, redundancy removal and accurate analysis and prediction of medical data, thereby achieving the purposes of ensuring integrity of medical data and enabling interpretation of the medical data to be more accurate.

The invention discloses a heatproof high-strength cable which comprises a conductor, an insulating layer, a high-temperature-resistant layer and an outer sheath insulating layer which are made of a modified polyvinyl chloride material. The modified polyvinyl chloride material comprises polyvinyl chloride, nylon, maleic anhydride grafted polyphenyl ether, bisphenol-A polycarbonate, stearic acid pentaerythritol ester, trioctyl trimellitate, stearic acid, isopropyl phenyl diphenyl phosphate, calcined kaolin, modified nano-calcium carbonate, maleic acid modified hydrotalcite, modified graphene oxide, carbon nanofibers, diethyl dithiocarbamate neodymium, calcium adipate, glyzinc, beta-diketone, pentaerythritol, ethylene-vinyl alcohol and antioxidant. The heatproof high-strength cable is high in intensity, good in heat resistance and long in service life.

System and method for funding via a prepaid card a financial product intended at a time of purchase by a purchaser for a customer. A customer cash account is created and funds allocated to the prepaid card are redeemed solely as cash funds in the customer's cash account. The customer may either withdraw at least some of the cash funds in the customer's cash account or apply at least some of the cash funds in the customer's cash account to a financial product. In response to receiving the customer's instructions to apply at least some of the cash funds from the customer's cash account to a financial product selected by the customer as well as their acknowledgement of disclosures or consent to an agreement related to the selected financial product, the cash funds are applied to an associated financial product account.

The white balance for a high brightness region and a low brightness region is improved in an image display device using MEMS and a laser light source. An image processing unit of the device superposes a signal based on a first measured value of a light quantity at a first temperature on a picture signal, during its blanking period, which is supplied to the laser light source, and superposes a high frequency signal on the picture signal during its effective scanning period. An amplification factor of the light source drive unit is changed so that a second measured value at a second temperature comes close to the first measured value at the first temperature as a target value based on the second measured value at which the light quantity of light generated at the laser light source is measured at the second temperature different from the first temperature on the signal based on the first measured value. By superposition of the high frequency signal, white balance control in a low brightness region for which control is especially difficult is performed with adequate accuracy.

The invention relates to an intelligent diagnosis diagnosis method and device based on an ensemble learning framework, equipment and a medium, and the method comprises the steps of collecting multi-source operation data of a target metrological verification automatic system, and carrying out the preprocessing of the multi-source operation data to obtain a corresponding fault data sample set; constructing a readable target data set of a preset fault diagnosis model according to the fault data sample set, wherein the preset fault diagnosis model adopts an XGBoost model, training the XGBoost model according to the target data set, and taking the corresponding XGBoost model after training as a target fault diagnosis model; and acquiring online operation data of the target metrological verification automatic system in real time, and analyzing the online operation data according to the target fault diagnosis model to predict the fault condition of the target metrological verification automatic system. According to the invention, the fault condition of the metrological verification automatic system can be accurately predicted on line in real time, and the fault diagnosis efficiency and accuracy are improved.

The invention relates to a methanation process for effectively recovering low-grade waste heat. The methanation process is characterized in that by a mode of filling water into raw synthesis gas, the gasifying-balance partial pressure and the gasifying temperature of water are reduced; and an evaporator and a superheater are arranged on an outlet pipeline of a final-stage methanation reactor, and the filled water is gasified till to be superheated by utilizing low-grade waste heat at an outlet of the final-stage methanation reactor. The methanation process has the advantages that on one hand, the recovery utilization rate of the final-stage low-level waste heat of the methanation reaction is increased, the yield of side-product steam is increased and the comprehensive energy efficiency of the methanation process is improved; on the other hand, according to the water filling amount, the heat release of the methanation reaction can be effectively controlled, the use of a high-temperature circulating gas compressor is avoided, the methanation reaction is easy to control and the safety of operation is improved.

The invention discloses a high-temperature-resistant and low-shrinkage polyarylester fiber master batch / polypropylene composite material and a preparation method thereof. The polyarylester fiber master batch / polypropylene composite material is prepared by the steps of rapidly and uniformly mixing the following components in parts by weight: 40-60 parts of polypropylene, 20-40 parts of polyarylester fiber master batches, 15-30 parts of a mineral filling agent, 1-3 parts of a compatilizer, 5-15 parts of a flexibilizer, 0.3-0.6 part of an antioxidant and 0.5-1.2 parts of a lubricant, and extruding and granulating by virtue of an extruder. The polyarylester fiber master batch / polypropylene composite material has the advantages of high temperature resistance, low shrinkage and high impact strength and bending modulus and can be widely applied to the fields of electrics, electrons and automobiles and other protection fields.

The invention discloses a multifunctional measuring mold body. The multifunctional measuring mold body comprises an upper template, an upper ionization chamber measuring plate, a multichannel detector plate, a lung measuring plate, multiple standard building measuring plates, multiple film measuring plates, a lower ionization chamber measuring plate and a lower template, wherein the aforementioned templates are successively stacked in a vertical direction, and at least one diagonal line of each aforementioned template is provided with at least two positioning holes. The multifunctional measuring mold body further comprises multiple positioning rods for inserting into the positioning holes. The aforementioned templates are fixed to form one body by inserting the positioning rods into the positioning holes. The template types and number used can be adjusted according to requirements when the multifunctional measuring mold body is used for measurement. The multifunctional measuring mold body provided by the invention can not only be used for single-layer two-dimensional film dosimetry verification, but also be used for multi-layer three-dimensional film dosimetry verification and daily quality assurance work for ensuring the conformity, flatness and symmetry of the light field and radiation field of an accelerator and the like.

A system and method for providing prepaid billing for users of an instant messaging system. A method includes determining whether a prepaid account balance associated with an IM client request satisfies a pre-determined criteria, establishing a regular IM session if the prepaid account satisfies the criteria, and establishing a limited IM session if the prepaid account does not satisfy the criteria. The system includes a prepaid account screener operable to determine whether a prepaid account balance satisfies the criteria, establish a regular IM session if the prepaid account satisfies the criteria, and establish a limited IM session if the prepaid account does not satisfy the criteria.

System and method for funding via a prepaid card a financial product intended at a time of purchase by a purchaser for a customer. A customer cash account is created and funds allocated to the prepaid card are redeemed solely as cash funds in the customer's cash account. The customer may either withdraw at least some of the cash funds in the customer's cash account or apply at least some of the cash funds in the customer's cash account to a financial product. In response to receiving the customer's instructions to apply at least some of the cash funds from the customer's cash account to a financial product selected by the customer as well as their acknowledgement of disclosures or consent to an agreement related to the selected financial product, the cash funds are applied to an associated financial product account.

The invention provides a search result correlation judgment-based search method and device. The method comprises the following steps of: A, generating a query candidate sequence by using original query of a user; B, searching a query candidate which is not searched in the query candidate sequence to obtain a current search result; C, obtaining a target search result participating in correlation calculation by using the current search result, and calculating the correlation of the target search result and the original query; D, judging whether the target search result is enough correlated with the original query or the preset finish condition is met; and E, returning the search result corresponding to the searched query candidate and serving as a final search result to the user. By the mode, the system overhead of the search engine is saved, and the response speed of the search engine is quickened.

The invention relates to a vector modulation phase shifter for reconfigurable antenna array beamforming, comprising: an input balun for converting a single-ended input signal into a differential inputsignal; an orthogonal signal generator, wherein the differential input signal passes through the orthogonal signal generator to generate two paths of orthogonal differential signals, namely an I-pathsignal and a Q-path signal; a variable gain amplifier comprising an I-path variable gain amplifier used for carrying out amplitude modulation and vector synthesis on the I-path signal, and a Q-path variable gain amplifier used for carrying out amplitude modulation and vector synthesis on the Q-path signal; and an output balun used for converting the differential signal into a single-ended signaland outputting the single-ended signal. The variable gain amplifier is suitable for the SiGe BiCMOS process, the balun of a transformer structure is adopted, phase and amplitude imbalance is reduced,the bandwidth of orthogonal signals is widened through the low-coupling-coefficient quadrature coupler, and the amplitude control precision is improved through the variable gain amplifier achieved bycontrolling bias currents combined with the Gilbert cell.

The invention discloses a downlink transmission time delay minimization method based on an NOMA-MEC system, and the method comprises the steps: firstly building a system model of a base station with amobile edge computing server and K mobile users, and enabling the base station and the users to be provided with a single antenna for transmitting and receiving signals; deducing a signal-to-noise ratio, a transmission bit constraint, a power constraint and an energy consumption constraint of the user according to the transmission characteristics of the downlink NOMA and the characteristics of the MEC system; then, a mathematical model with the purpose of minimizing system time delay is constructed; and finally, designing an optimization algorithm to obtain an optimal resource allocation scheme with the purpose of minimizing the time delay. According to the method, the problem that the time delay and the energy efficiency of an existing NOMA-MEC system are unbalanced in the downlink transmission process in a multi-user scene is solved, and the transmission time delay of the system can be reduced to the minimum under the common constraint of the calculation task, the power and the energy consumption.

A coated gas bubble for recovering oil from oil-containing samples is provided, comprising a gas bubble and a coating mixture comprising a hydrophobic coating agent and a coating promoting additive, wherein the coating promoting additive is present in an amount sufficient to promote the substantially continuous coating of the gas bubble with the hydrophobic coating agent. A method for forming such coated gas bubbles and a method for recovering oil from oil-containing samples using coated gas bubbles is further provided.