232 results about "Middle phase" patented technology

The invention belongs to the technical field of bioengineering, and relates to a method for extracting and salting organic acids out of fermentation liquor. The method is characterized in that: soluble inorganic or organic salt solids or concentrated solution thereof and an extracting agent are added into the organic acid fermentation liquor, stirred for uniform mixing, and stood at room temperature for phase splitting; when two phases are formed by the salting-out and extraction, an upper phase is a solvent phase rich in the organic acids, while a lower phase is a salt phase rich in other components; if the extraction operation is directly performed without pretreating the fermentation liquor, a solid phase layer rich in bacteria and proteins is formed between the two phases; when three phases are formed, the upper phase is the solvent phase, a middle phase is the phase rich in the organic acids and the lower phase is the salt phase rich in the other components; therefore, the aim of extracting and separating the organic acids is fulfilled. The method solves the problems of difficulties in product separation, high cost and the like in the conventional process for separating the organic acids by a fermentation method, is simple, ensures separation time, low cost and high recovery rate, and is an organic acid separation method with industrial application prospect.

The invention provides a method for preparing a special carbon material with sheet stacked phase structure, integrated carbon atoms at the edge of pore wall surface and controllable pore structure. Special middle phase bitumen is used as a carbon precursor. The carbon precursor is mixed with an inorganic template uniformly in a certain way, the heat preservation is carried out under certain temperature for 0.5 to 10 hours, an electric cooker is heated to 900 DEG C at the speed of 5-20 DEG C / min, and the temperature is kept for 1 to 2 hours. The template is removed, and the carbon material with special phase, surface and pore structure is prepared. The carbon material is subjected to heat treatment within the range of 1500 to 2600 DEG C, and the graphitization degree of the carbon material is adjusted. The method for preparing the carbon material has the advantages of easily obtained raw material and simple technology. Being used as electrode material of a super capacitor, the quality specific capacitance of the carbon material in 6mol / LKOH solution is 220F / g, the unit area specific capacitance is 45muF / cm <2>, and the carbon material has good high-power working performance. Being used as a lithium ion cell cathode, the reversible capacity of the carbon material is 485mAh / g, and the carbon material has the good high-power working performance.

The invention relates to a blocking remover of a gas well shaft. The blocking remover comprises, by weight, 5-25% of an alcohol ether compound, 0.5-10% of a dispersant, 1-10% of a cleaning agent, and 0.5-5% of chelating agent, with the balance being a nitrogen-containing polar solvent, wherein the nitrogen-containing polar solvent is one selected from N,N dimethyl formamide, N,N dimethyl acetamide, and N-methyl pyrrolidone, the alcohol ether compound is one selected from glycol-ether, glycol-propyl ether, glycol-butyl ether, and diglycol-ether, the disperant whose micelle particle size is from 20nm to 100nm is a middle-phase microemulsion-type dispersant mixed by kerosene, water, a surfactant and a cosurfactant, the cleaning agent is one selected from allene diamine, acetonitrile and pentylamine, and the chelating agent is one selected from sodium citrate and EDTA. The blocking remover has the advantages that corrosivity is weak, that the speed of dissolving blockage is fast, that the product performance is stable in high temperatures, and that the blocking remover can reduce damages caused by water locking and fouling in areas close to gas wells, and can recover the permeability of storing layers.

A transition mode power factor correction converter comprising a boost inductor, a switch, a diode, and output tank capacitor, has circuit means of limitation of the off-time interval of the switch to a fraction of the off-time interval, “complementary” to the on-time interval that is normally controlled for regulating the output voltage, during part of a cycle of a rectified sinusoidal voltage waveform input to the converter, when the current flowing in the inductor reaches a maximum threshold, causing the mode of operation of the device to switch from transition mode to continuous current mode for a middle phase angle region of a rectified sinusoidal input voltage waveform, under high load conditions, defined by said maximum current threshold. Current peaks amplitude and ripple are effectively reduced for same output power.

The invention relates to a method for preenriching and separating lithium and boron from salt lake brine by liquid-liquid-liquid three-phase extraction, which comprises the following steps: adding water-soluble auxiliary extractant into a salt lake concentrated brine solution, regulating the pH value of the brine, adding water-soluble high molecular polymer, and thoroughly mixing at room temperature to obtain an upper / lower two-layer liquid-phase system; adding organic extractant, and mixing to obtain an upper / middle / lower three-layer liquid-phase system; and taking the upper and middle phases from the three-liquid-phase system, and respectively recovering lithium and boron in the upper and middle phases by back washing. The invention can simultaneously enrich and extract lithium and boron by one-step extraction from high-magnesium / lithium-ratio salt lake brine, and can separate the lithium and boron from abundant coexistent ions of magnesium, calcium and other impurity metals in the brine. The lithium and boron are respectively selectively enriched from the upper and middle phases in the three-liquid-phase system to implement primary separation, thereby facilitating the subsequent purification and refinement. The three-liquid-phase extraction can be carried out under neutral or weakly-acidic conditions, and has strong adaptability.

The invention provides a combined method for separating fluid catalytic cracking slurry oil and preparing oil-series needle coke. C3-C5 light dydrocarbon cut fraction is adopted as extraction solvent for conducting sub-critical or super-critical extraction on fluid catalytic cracking slurry oil, solvent is recovered from an obtained extraction oil phase in a super-critical mode to prepare extraction components, the extraction components serve as raw materials for preparing middle phase asphalt, and the middle phase asphalt is prepared through retrogressive reaction and then subjected to delayed coking reaction to prepare high-quality oil-series needle coke. When the sulfur content of fluid catalytic cracking slurry oil is high, extraction light components can be subjected to hydrodesulfurization treatment first, hydrogenated oil is subjected to fractionation to collect hydrogenation tail oil, the hydrogenation tail oil serves as a raw material for preparing middle phase asphalt, and then the needle coke is prepared. By means of the method, by controlling the preparation of middle phase asphalt and the coking procedure of the needle coke to be independent of each other, industrial implementation is easier, and fluid catalytic cracking slurry oil can be sufficiently used and the high-quality needle coke material can be prepared.

A method for extracting effective components from natural products by adopting triple liquid phases belongs to the technical field of bioengineering. The method is characterized by directly adding inorganic salt solutions, hydrophilic low-molecular organics and hydrophobic organics into ground natural products in proportion, or adding solid inorganic salts and hydrophobic organics into the extractof the hydrophilic low-molecular organics of the natural products in proportion, evenly stirring the mixture, carrying out standing or centrifuging on the mixture to form triple liquid phases; the effective components are enriched on the top phase, middle phase and bottom phase respectively based on different polarity and distributing partial protein, and polysaccharides and crude drug residue among phase interfaces to achieve the purpose of simultaneously extracting the effective components with different polarity from the natural products. The invention has the effects and benefits of developing an easily industrialized method for extracting and separating the effective components from the natural products, increasing the extraction efficiency, effectively combining the technologies ofextraction, separation and purification and being beneficial to reducing the production cost of the effective components from the natural products.

The invention relates to the technical field of variable frequency control, in particular to a current sampling method for a frequency converter, comprising: when performing current sampling during phase sampling, detecting and sequencing the phases of a three-phase voltage, and determining a voltage maximum-phase signal, a voltage middle-phase voltage and a voltage minimum-phase signal; performing current sampling of the current vector information corresponding to the voltage middle-phase signal and the current vector information corresponding to the voltage minimum-phase signal, wherein thecurrent vector information corresponding to the voltage maximum-phase signal is an inverted phase of the sum of the current vector information corresponding to the voltage middle-phase signal and thecurrent vector information corresponding to the voltage minimum-phase signal. In the method provided by the invention, the problem that a current sampling dead zone exists in two recent sampling modes is solved, and synchronously current sampling precision is guaranteed by adopting a two-phase PWM (pulse-width modulation) modulation mode.

The invention relates to a demodulation and timing synchronization combined method for a GFSK (Gauss Frequency Shift Key). In the invention, an oversampling signal is used as an input of a demodulation and synchronization loop; after a phase of the sampling signal is adjusted by an interpolation filter, conjugate multiplication is carried out on the sampling signal by every two continuous sampling values to obtain a phase difference; and the phase difference is used as an input of timing error detection. With a difference between front and back phase values as a direction of error adjustment,a middle phase value of every three continuously calculated phase values is used as a size of the error adjustment. A timing error is fed back to the interpolation filter after passing through a loopfilter, and a new sampling value is adjusted again and again. By using the invention, the realization complicatedness of hardware is simplified and the use of a square error detection algorithm is avoided under an oversampling situation; and the demodulation and timing synchronization combined method for the GFSK, provided by the invention, has the advantages of small hardware cost and good timing detection performance.

A clock data recovery circuit has a good jitter tolerance characteristic and a broad data recovery range in the event of a wander, that is, a good wander-tracking characteristic of a recovered clock signal. The clock data recovery circuit executes control to compare the position of the edge of data with the position of the edge of a data recovery clock signal (a recovered clock signal) and keeps the clock edge away from the data edge if a gap between the edges becomes smaller than a reference value. A cycle of a reference clock signal is divided into N portions to generate N clock signals (pl ) with phases different from each other in composition circuits. By executing control to turn on 2 of the N selector control signals supplied to each 2 adjacent pins of the N−1 selectors at the same time, the N−1 selectors are capable of generating a middle phase between first and second phases and, hence, generating one of N×2 phases from N input phases as the phase of the data recovery clock signal.

The invention relates to a method for improving the lightning protection capacity of a super or ultra high-voltage transmission line. Under the condition of no changing the original line pole tower and conducting wire type, two lightning protection line brackets are arranged on a middle-phase cross pole of the one-tower double-circuit super or ultra-high-voltage pole tower additionally, and two lightning protection lines are arranged on the brackets along the line additionally. Compared with the existing super or ultra high-voltage transmission line, the invention can improve the lightning protection capacity of the super or ultra high-voltage transmission line, and the cost of the newly added lightning protection line brackets and the lightning protection lines is only about 4 percent of the original total cost.

The invention discloses a system for managing cognitive network resources and a management method. The system comprises three layers of management entities: NRM, RNRM and TRM, and utilizes a GPRS network to realize information interaction among the management entities. Th resource management comprises the following steps: a terminal is newly added to intercept a GPRS broadcast channel of an initialization phase to obtain RAN configuration information; the terminal selects RAN register according to the RAN configuration information; the connectivity of the terminal in a dormant state is checked at set intervals; if communication is needed, the terminal enters a middle phase of running; RNRM obtains relative information, and obtains a RAN reconstruction strategy and a RM strategy; NRM utilizes a the RAM reconstruction strategy to control network reconstruction; and TRM obtains the needed RM strategy and history information to finish terminal reconstruction. The invention relizes layering distribution type management of resources by introducing RNRM; the GPRS network technology is utilized to realize the information interaction among the management entities; and combination of local optimization and whole optimization is realized by predetermining user actions, and the invention can be used for management of the cognitive network resources.

The disclosure relates to a BUCK-BOOST type DC converter and a control method thereof; the converter comprises a BUCK-BOOST circuit module, a drive module, an output voltage sampling module, a mode control module and a current detection module; the current detection module is in middle phase connection with the BUCK-BOOST circuit module, used for detecting inductance current in the BUCK-BOOST circuit, and sending current detection signals to the mode control module; the mode control module can form a corresponding PWM mode control signal or a PSM mode control signal according to the current detection signal and an output voltage sample signal; according to the PWM mode control signal or the PSM mode control signal, the drive module drives the BUCK-BOOST circuit to work in a BUCK mode, a BOOST mode or a BUCK-BOOST mode under the PWM mode, or to work in the BUCK-BOOST mode under the PSM mode. The DC converter can output a stable voltage in a full load range, and the switch tube power consumption and circuit static loss can be reduced in a mode switching process, thus improving the conversion efficiency.

A converter for a wind energy installation and a method. The converter includes an inverter which drives a generator via a plurality of phases and an intermediate circuit having an intermediate-circuit voltage between an upper and a lower intermediate-circuit potential. The generator is driven with phase potentials at a variable frequency. A shift value is calculated between an extreme phase potential and one of the intermediate-circuit potentials, a separation value is determined between a middle phase potential and the closest intermediate-circuit potential, and an additional voltage is generated using the separation value as amplitude. The phase potentials are shifted through the shift value and the additional voltage is added to the middle phase potential. Accordingly, the switching elements in the converter do not need to be clocked in every second half-cycle resulting in reduced switching losses and increased current load capacity of the converter.

The invention relates to the technical field of motor control, in particular to a method for realizing medium phase zero-breaking and zero-closing by a control protection switch. The control protection switch is a carrier to realize the method, and comprises a central processing module and a contactor module. The method is characterized by comprising the following steps that: a main CPU singlechip of the central processing module acquires a voltage signal through a voltage signal acquisition circuit, and acquires a current signal through a current signal acquisition circuit; then a three-phase electricity zero-crossing point period is compared with electrified closing mechanical time and power off breaking mechanical time of the contactor module; and a closing or breaking signal after judgment is sent so as to close or break the contactor module of the control protection switch on the medium phase zero point of the three-phase electricity. The method is a simple and effective method for relieving the overvoltage and overcurrent impact, improves service life of the switch body, reduces abrasion of a contactor material, and reduces consumption of noble metal resources.

The invention discloses a preparation method of an Al-Ti-B-C quaternary grain refiner. The preparation method comprises the following steps: according to generation weigh percentage of 1.00-12.00% of Ti, 1.00-4.00% of B, 0.25-1.00% of C and the balance of Al, uniformly mixing sponge titanium powder and boron carbide powder; warming and melting commercially pure aluminum; pressing a mixture of sponge titanium powder and boron carbide powder into molten aluminum; introducing continuous ultrasonic treatment on upper portion of the molten aluminum; and naturally cooling molten aluminum to obtain the Al-Ti-B-C quaternary grain refiner. The preparation method provided by the invention can prevent toxic fluoride gases discharging in traditional preparation reactions, reduce reaction temperature, reduce oxidative damages of molten aluminum, quicken reaction between boron carbide and solute titanium, greatly shorten reaction preparation time, improve a distribution state of a middle phase of the grain refiner, and reduce refining response time; grain size of commercially pure aluminum in cast condition of prepared materials provided by the invention is less than 150 microns.

The invention discloses a low-power-consumption high-precision array-type time digital conversion circuit based on multiple VCOs (voltage controlled oscillators). The low-power-consumption high-precision array-type time digital conversion circuit comprises an ultrahigh-phase TDC (time-to-digital converter) circuit, a high-phase TDC circuit, a middle-phase TDC circuit, a low-phase TDC circuit and a DFF latch chain, the ultrahigh-phase TDC circuit, the high-phase TDC circuit and the DFF latch chain are in a pixel exclusive circuit and are arranged in a pixel, and the middle-phase TDC circuit and the low-phase TDC circuit are in a global shared circuit and arranged outside the pixel; measuring of time interval is completed through orderly cooperation of the ultrahigh-phase TDC circuit, the high-phase TDC circuit, the middle-phase TDC circuit and the low-phase TDC circuit, and finally the time interval is converted into a numerical value for representation. The low-power-consumption high-precision wide-range four-phase array-type time digital conversion circuit can be used for an array-type detector timing system and can obviously improve resolution of the system and lower power consumption of the system.

A valve timing control device comprises a drive rotation member driven by a crankshaft of an internal combustion engine; a driven rotation member fixed to a camshaft that actuates engine valves to open and close, the drive rotation member and driven rotation member being coaxially arranged to make a relative rotation therebetween; a phase varying mechanism that rotates the driven rotation member relative to the drive rotation member within a given angle, the phase varying mechanism being able to cause the driven rotation member to take the most-retarded phase position, the most-advanced phase position and a middle phase position defined between the most-retarded phase position and the most-advanced phase position; and a position keeping mechanism that is able to keep the driven rotation member at least the most-retarded phase position and the middle phase position at the time of starting the engine, and is able to select one of the most-retarded phase position and the middle phase position in accordance with an operation condition of the engine.

The proposed process of the present application passes a concentrated surfactant in a lamellar phase though a high-shear device diluting the concentrated surfactant in a lamellar phase to an isotropic phase without encountering the highly viscous middle phase.

Provided are a rubber composition for outer layers of tires with which it is possible to reduce the amount of phosphorus used, and further to improve initial grip performance and grip performance during the middle phase of running while maintaining or improving good abrasion resistance, thereby achieving a balanced improvement in these properties, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for outer layers of tires, containing a rubber component, a plasticizer, a resin having a softening point of 30° C. or higher, and sulfur, the plasticizer including an aliphatic polybasic acid ester having a freezing point of −50 to −10° C., the rubber composition containing, per 100 parts by mass of the rubber component, 0.5 to 50 parts by mass of the aliphatic polybasic acid ester and 2 parts by mass or more of the resin.

The invention discloses a lung 4D-CT image exhaling process middle phase image reconstruction method based on registration. The method includes the steps of firstly, acquiring an inhaling end phase image and an exhaling end phase image according to lung 4D-CT image data; secondly, selecting the inhaling end phase 3D-CT image as a reference image and the exhaling end phase 3D-CT image as a floating image, and registering the two phase images to obtain a motion deformation field between the two phase images; thirdly, reconstructing the lung 4D-CT image exhaling process middle phase image on the basis of the motion deformation field obtained at the second step. The method has the advantages that the 4D-CT image exhaling process middle phase image can be reconstructed by using two known special phase images, and the defect that the absorbed dose of a patient is high due to the fact that lung 4D-CT data is many in collecting phases and long in scanning time is overcome.

Belonging to the technical field of environment-friendly application of drilling engineering oilfield chemistry in the petroleum and natural gas field, the invention relates to an oil based drilling cutting microemulsion cleaning solution and a cleaning method thereof. For the oil based drilling cutting microemulsion cleaning solution, a surfactant, a cosurfactant, an oil phase and water are mixed in a volume percentage of (17-56):(11-18):(10-33):(21-33) to form three phases, and the middle phase is the microemulsion cleaning solution. The surfactant is ether alcohol, preferably ethylene glycol monobutyl ether or phenoxy propanol, and the cosurfactant is short chain alcohol, preferably n-butyl alcohol or isopropyl alcohol. The cleaning solution and drilling cuttings are mixed uniformly according to a mass ratio of (0.5:1)-(3:1), then solid-liquid separation is carried out, and the base oil, cleaning solution and drilling cuttings cleaned out from the oil based drilling cuttings are separated into different phases. Compared with other oil based drilling cutting treatment technologies, the process is simple, the base oil recovery rate is greater than 80%, and the residual oil content of the drilling cuttings is less than 2%, thus meeting relevant environmental protection technical standards. Also, the microemulsion cleaning solution can be used repeatedly, and the treatment cost is low.

The invention relates to the technical field of metallic ion extraction and separation, particularly a liquid-liquid-liquid three-phase extraction and separation method of enriched iron in a middle phase. The method comprises the following steps: (1) reducing Fe<3+> in an ferric ion water solution into Fe<2+>; (2) sequentially adding phenanthroline, water-soluble high molecular polymer and inorganic strong electrolyte salt into the solution obtained in the step (1), and sufficiently and evenly mixing to obtain a mixed solution, wherein the mol ratio of phenanthroline to Fe<2+> is (3-8):1; and (3) regulating the pH value of the mixed solution obtained in the step (2) to 1.0-6.0, adding a water-insoluble organic reagent, thoroughly mixing, standing, and centrifugalizing to obtain a three-phase system in which the upper, middle and lower layers coexist, wherein the phenanthroline and ferric ion complex enter the middle water phase containing the water-soluble high molecular polymer, thereby implementing liquid-liquid-liquid three-phase extraction and separation of enriched iron in the middle phase. The method provided by the invention can implement highly separation of target metal and iron.

The invention provides a phase-change material / air-coupled hierarchical battery heat management system, and belongs to a battery heat management technology. The management system mainly comprises a base, a cover, outer fins, inner fins, an upper phase-change material box, a middle phase-change material box and a lower phase-change material box; multiple phase-change material boxes filled with different phase-change materials are arranged between batteries respectively; multiple rows of outer fins with different densities and lengths are distributed on two front and back side surfaces of each phase-change material box at intervals; multiple rows of inner fins are arranged on an internal side plate of each phase-change material box at intervals; and the densities of the inner fins far away from poles of the batteries are higher than those close to the poles of the batteries. Heat generated by the batteries is efficiently taken away by organically coupling two heat management technologies of phase-change material cooling and air cooling; the temperature differences in single batteries / between the batteries are effectively reduced by adopting hierarchical arrangement of the phase-change materials and the fins; and the temperature uniformity of the single batteries / battery packs is improved. The phase-change material / air-coupled hierarchical battery heat management system is obvious in temperature control and temperature equalization effects, compact in structure and convenient to install and maintain.

The invention discloses a phase change insulating brick and a manufacturing method thereof. The phase change insulating brick comprises a middle phase change material sandwich layer and a brick body peripheral hard material structural protection layer which is covered outside the middle phase change material sandwich layer, wherein the brick body peripheral hard material structural protection layer is an integrally-molded rectangular structural layer comprising an upper protection layer, a lower protection layer and surrounding protection layers; and a connecting post which passes through the middle phase change material sandwich layer and is molded integrally with the upper protection layer and the lower protection layer is arranged between the upper protection layer and the lower protection layer. The phase change insulating brick can be applied to space enclosing structures such as building walls, floors, roofs and the like, effectively improve the indoor temperature environment and particularly improve the indoor temperature environment of a top layer building when applied to a roof.

The invention discloses a method for enriching DHA and EPA in fish oil based on an immobilized enzyme. The method comprises the following steps: preparing a lipase solution, adding a soluble salt anda hydrophilic solvent to the lipase solution to form a two-phase system, and carrying out liquid separation to obtain an upper liquid immobilized lipase phase and a salt-rich lower phase; blending theobtained liquid immobilized lipase with a soluble salt solution and fish oil to form a three-liquid phase system, carrying out an enzyme catalyzed reaction under a stirring condition, and standing orcentrifuging the obtained solution after the reaction is finished in order to obtain three layers which are an upper phase being a fish oil product, a middle phase being the liquid immobilized lipaseand a lower phase being a reaction medium rich in glycerol hydrolysate; and adding the upper phase fish oil product to an alkali solution, then adding a hydrophobic organic solvent, carrying out standing extraction, taking the obtained upper phase, and distilling the upper layer to obtain a glyceride product rich in EPA and DHA. The method realizes the rapid separation of the product and the catalyst, and the lipase can be repeatedly used, and can improve the catalytic efficiency, so the enzyme loss and the purifying cost are greatly reduced.