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1026 results about "Mixed phase" patented technology

Process for fluid phase in-line blending of polymers

A process for fluid phase in-line blending of polymers. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed separation; contacting in at least one of the parallel reactor trains olefin monomers having three or more carbon atoms, catalyst systems, optional comonomers, optional scavengers, and optional inert diluents or inert solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous fluid phase polymer-monomer mixture in each parallel reactor train; combining the reactor effluent from each parallel reactor; passing the combined reactor effluent through the separator; maintaining the temperature and pressure within the separator above the solid-fluid phase transition point but below the cloud point pressure and temperature to form a fluid-fluid two-phase system including a polymer-rich blend phase and a monomer-rich phase; and separating the monomer-rich phase from the polymer-rich blend phase. The separated monomer-rich phase is recycled to the polymerization reactor bank. The polymer-rich blend phase is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a polymer product blend.
Owner:EXXONMOBIL CHEM PAT INC

Time-varying mixed-phase seismic wavelet extraction method based on time-frequency spectrum simulation

The invention discloses a time-varying mixed-phase seismic wavelet extraction method based on time-frequency spectrum simulation. The method is characterized in that on the basis that improved generalized S transformation is carried out on a non-stationary seismic record, a time-frequency filter is introduced for the first time to filter a time-frequency spectrum of the seismic record, then a wavelet amplitude spectrum at each moment is estimated according to the spectrum simulation method, a mixed-phase spectrum of the wavelets is reconstructed in the seismic record with the time-varying wavelet amplitude spectrums removed according to the bispectrum method of high-order cumulants under the assumed condition that the phases of the wavelets are time-invariant, and the amplitude spectrums and the phase spectrum are combined to achieve extraction of the time-varying mixed-phase wavelets. Compared with a conventional stage extraction method, the time-varying wavelet extraction method has the advantages that the assumption that stages of the wavelets are stable is not needed, the time-varying wavelets can be accurately estimated even though the attributes of the wavelets at adjacent stages vary greatly, the mixed phase of the extracted wavelets is more consistent with the reality and seismic data can be analyzed and processed more finely and more accurately. The method has great application value in improving the resolution of the seismic data.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Mixed phase-shifting control method used for dually-active full-bridge direct current converter

InactiveCN103516224ASmall current stressLow on-state lossDc-dc conversionElectric variable regulationFull bridgeThree-phase
The invention discloses a mixed phase-shifting control method used for a dually-active full-bridge direct current converter, and belongs to the technical field of power electronics. The mixed phase-shifting control method comprises the following steps: drive pulses of eight switching tubes in the converter are all set to be square waves; the drive pulse of the first switching tube and the drive pulse of the third switching tube in a first full bridge are set to be complementary with the drive pulse of the second switching tube and the drive pulse of the fourth switching tube in the first full bridge respectively, and the drive pulse of the first switching tube and the drive pulse of the third switching tube in a second full bridge are set to be complementary with the drive pulse of the second switching tube and the drive pulse of the fourth switching tube in the second full bridge respectively; a phase-shifting angle D1 is formed between the drive pulse of the first switching tube and the drive pulse of the fourth switching tube in the first full bridge, another phase-shifting angle D1 is formed between the drive pulse of the second switching tube and the drive pulse of the third switching tube in the first full bridge, and similarly a phase-shifting angle D2 is formed between the drive pulses of the switching tubes in the second full bridge; a phase-shifting angle D3 is formed between the drive pulse of the first switching tube in the first full bridge and the drive pulse of the corresponding switching tube in the second full bridge, and another phase-shifting angle D3 is formed between the drive pulse of the second switching tube in the first full bridge and the drive pulse of the corresponding switching tube in the second full bridge; the magnitude and flow direction of output voltage and the magnitude and flow direction of transmission power of the converter are controlled by adjusting the three phase-shifting angles. By means of the mixed phase-shifting control method, the voltage and current stress of the converter can be reduced, loop currents are reduced, and efficiency is improved.
Owner:TSINGHUA UNIV +1

Whitening spot-relieving cream cosmetic and preparation method thereof

The invention discloses a whitening spot-relieving cream cosmetic, which comprises the following components by weight: A, a main body whitening spot-relieving component; B, an auxiliary whitening spot-relieving component; C, an oil phase component; D, a water phase component; E, thickening stabilization component; and F, an auxiliary agent component. The method for preparing the cosmetic comprises the following steps: a, raising the temperature of the C phase to between 65 and 95 DEG C, keeping the temperature between 75 and 85 DEG C, adding the B phase, and stirring and dissolving the mixture completely; b, raising the temperature of the D phase to between 65 and 95 DEG C, keeping the temperature between 75 and 85 DEG C, and stirring and dissolving the D phase completely; c, sucking the C mixed phase into an emulsification pot first, then sucking the D phase into the emulsification pot slowly, adding the A phase, homogenizing the mixture for 5 to 15 minutes, keeping the temperature and stirring the mixture for 5 to 15 minutes, and vacuumizing the mixture to reduce the temperature; d, adding the E phase when the temperature is between 50 and 70 DEG C, homogenizing the mixture for 2 to 3 minutes, and stirring the mixture evenly; and e, adding the F phase when the temperature is between 30 and 50 DEG C, and stirring the mixture evenly to obtain the product of the whitening spot-relieving cream cosmetic. The invention aims to overcome the defects of the prior art and provide a quick, high-efficiency, green and safe whitening spot-relieving cream cosmetic product.
Owner:ATHENA GUANGZHOU COSMETICS MFR

Preparation method of double-sided passivated crystalline silicon solar cell

The invention discloses a preparation method of a double-sided passivated crystalline silicon solar cell, belonging to the technical field of photovoltaic power generation. The preparation method comprises the following steps of: firstly, respectively carrying out surface precleaning and surface texturing on P-shaped single crystal silicon and a polycrystalline silicon wafer by adopting an alkaline solution and an acid solution; secondly, diffusing by using phosphorus oxychloride as a diffusion source to form a PN junction; thirdly, removing a phosphosilicate glass on the surface of the silicon wafer by adopting a chemical wet method, and etching the edge of the silicon wafer by adopting a plasma; fourthly, preparing a silicon nitride film on the surface of an emitting region of a P-type silicon wafer by adopting a plasma enhanced chemical vapor deposition method; fifthly, preparing a mixed phase film material of hydrogenated microcrystalline silicon and amorphous silicon by adopting a hot filament chemical vapor deposition method, depositing a film at one side of the P-type silicon wafer, and passivating the defects and a dangling bond on the surface of the P-type silicon wafer; and sixthly, sintering a screen printing back electrode and a screen printing positive electrode to form the solar cell. The invention lowers the probability of compounding photo-generated minority carriers on the back surface, enhances the long-wave light quantum efficiency and creates the conditions of transportation and collection of the photo-generated carriers.
Owner:SHANGHAI JIAO TONG UNIV

High-speed jet gas-liquid mixing-phase ejector

InactiveCN101491794AGuaranteed high-speed jetStrong penetrating powerLiquid spraying apparatusJet flowGas phase
The invention relates to a fluid ejector, and aims to provide a gas-liquid mixed phase ejector for ejecting at a high speed. The ejector comprises a liquid phase inlet pipe and a gas phase inlet pipe which are provided with a quick coupler respectively; the tail end of the liquid phase inlet pipe is connected with a liquid phase nozzle; the tail end of the gas phase inlet pipe is connected with a gas phase nozzle; the liquid phase nozzle is a single-hole nozzle; a flow passage from the liquid phase inlet pipe to the liquid phase nozzle has smooth transition; the gas phase inlet pipe encloses the outside of the liquid phase inlet pipe to form an annular gas phase flow passage; the gas phase nozzle encloses the outside of the liquid phase nozzle and is connected with a mixed phase flow passage; the tail end of the mixed phase flow passage is connected with an outlet nozzle; and an outlet circulation sectional area of the outlet nozzle is smaller than that of a circulation sectional area of the mixed phase flow passage. The liquid phase nozzle has high-speed outlet liquid flow, and the high-speed outlet liquid flow is interacted with high-speed gas phase flow in the mixed phase flow passage to realize atomization and once more acceleration, thereby the ejector greatly weakens boundary layer effect on the outlet, avoids that liquid drops separating from main jet flow are convergent to drop on the outlet, and can flexibly adjust and control atomization fineness and distribution.
Owner:ZHEJIANG UNIV +1
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