157 results about "Phase balance" patented technology

Methods and apparatus for performing amplitude and phase imbalance correction operations on in-phase and quadrature phase signal components corresponding to a received signal are described. The imbalance correction operations relay on the use of relatively simple to implement feedback loops. The phase imbalance feedback loop relies on the tendency of transmitted symbols to be distributed uniformly around the origin of the I/Q plane if proper phase balance is present in the processed signal. Phase correction coefficients are generated over time as a function of the negated product of the processed in-phase and quadrature phase signal components. Amplitude correction coefficients are generated over time as a function of the difference in the squared values of the I and Q processed signal components.

The invention belongs to the technical field of irregular oil gas development and production increase, and particularly relates to an evaluating method of oil and gas reservoir seepage by supercritical carbon dioxide fracturing fluid and a method thereof; a carbon dioxide pressurizing and filling system provides carbon dioxide air source and pressure, and is connected with a supercritical carbon dioxide fracturing fluid phase balance reaction system; the supercritical carbon dioxide fracturing fluid phase balance reaction system is linked with a temperature control system in parallel; a core displacement and permeability measuring system is respectively connected with the supercritical carbon dioxide fracturing fluid phase balance reaction system and a return pressure system, so that the fracturing fluid is effected on the core; the return pressure system provides necessary return pressure for experiment, so as to simulate the real formation condition. The device can adjust the experiment temperature and pressure according to different experiments, and exactly determine the damage rate of the supercritical carbon dioxide fracturing fluid core, and study influences of supercritical carbon dioxide fracturing fluid on the core damage rate under different experimental conditions.

The invention discloses a single-phase and three-phase combined in-phase power supply and transformation device which comprises a single-phase traction transformer, a three-phase YNd11 grounding compensation transformer and a single-phase in-phase compensation device thereof; the in-phase compensation device comprises an alternating current-direct current-alternating current (AC-DC-AC) converter; the traction transformer and the compensation transformer have equal effect to a three-phase and two-phase balance transformer with the phase of secondary side voltage being vertical; when in a normal state, the traction transformer, the compensation transformer and the in-phase compensation device jointly supply power for a transaction load by a specified proportion; when the compensation transformer or the in-phase compensation device exit the operation, the traction transformer can work independently in a short time; and a backup traction transformer can replace the traction transformer to work and can work on linear voltage different from that of the traction transformer. According to the device, the electric phase at the exit of a traction transformer substation can be canceled, so that the electric energy quality requirements mainly comprising the unbalance of three-phase voltage can be met, and the optimal configuration of traction power supply resources can be realized.

The invention provides a method for determining the phase balance condition of gas hydrates, which mainly has the procedures: gas to be measured is caused to generate hydrates in a reaction kettle which is provided with a temperature measurement system, a pressure measurement system and an exhaust system; gas-phase space in the reaction kettle is compressed; system temperature in the reaction kettle is regulated to the temperature of the phase balance condition to be measured to exhaust the gas and lower the pressure, as well as the exhaust system is closed when the pressure in the reaction kettle rises at once because the exhaust is stopped, thus the reaction kettle is caused to become a closed system; the variation of the pressure in the reaction kettle is observed, if the pressure keeps invariant for a long time, three-phase balance is considered to be reached, at this time, the corresponding temperature and the corresponding pressure are a set of phase balance condition for the hydrates. The system temperature can further rise to the next balance temperature to be measured, the pressure variation is continuously recorded until the hydrates in the reaction kettle is completely decomposed, therefore, a series of phase balance condition data of the hydrates can be obtained. Adopting the method, the phase balance condition of the gas hydrates in a free water system or a porous media can be measured, and the measurement accuracy is high.

A lamp heater and a drying apparatus including the same, the lamp heater including a plurality of three-phase power source lamps, a dummy load, the dummy load being configured to maintain a phase balance of the three-phase power source lamps, and a controller, the controller controlling the three-phase power source lamps and the dummy load depending on a lighting condition of the three-phase power source lamps.

A multi-phase DC-DC converter incorporates auxiliary resistor networks to feed back to the converter's supervisory controller voltages representative of secondary sensed currents associated with primary currents sensed relative to the common nodes of the respective phases, and derived from the output nodes for each phase. The auxiliary resistor network-coupling of these secondary sensed currents enables the controller to more completely take into account the influence of the currents of each channel on every other channel, whereby phase-balanced control of all converter channels is achieved, irrespective of symmetry of the integrated circuit layout of the different phases of the converter.

A method of generating a mask design having optical proximity correction features disposed therein. The methods includes the steps of obtaining a desired target pattern having features to be imaged on a substrate; determining a first interference map based on the target pattern, which defines areas of constructive interference between at least one of the features to be imaged and a field area adjacent the at least one feature; placing a first set of assist features having a first phase in the mask design based on the areas of constructive interference defined by the first interference map; determining a second interference map based on the first set of assist features, which defines areas of constructive interference between assist features of the first set of assist features and a field area adjacent at least one of the assist features of the first set of assist features; and placing a second set of assist features having a second phase in the mask design based on the areas of constructive interference defined by the second interference map, wherein the first phase does not equal the second phase.

The invention discloses a natural gas hydrate CO2 substitution extraction method combined with depressurization. The method includes: using alow-density mud drilling technology to depressurize natural gas hydrate reservoir so as to decompose part of the natural gas hydrate; using heterogeneous alcohol ethoxylate as an emulsifier and liquid CO2 as dispersion phase water and a continuous medium to prepare a CO2 emulsifier in a high-pressure container with controlled pressure and temperature; drilling a CO2 emulsifier filling passage, and filling the CO2 and a water emulsifier into a natural gas hydrate reservoir through an emulsifier filling opening; controlling reservoir pressure through the emulsifier filling opening to be in the CO2 hydrate phase balance pressure range corresponding to the reservoir temperature so as to promote the reaction of the CO2 and the natural gas hydrate, and generating CO2 hydrate and gaseous CH4. By the method, CO2 emission reduction is achieved, extraction safety is increased, reservoir seepage characteristics can be improved effectively, the emulsifier is prompted to seep into the reservoir, and the efficiency of the CO2 substitution extraction method is increased.

A system for balancing a signal having I and Q components includes means for cross correlating the I and Q components to produce a cross correlation product; means for adjusting the gain of each I and Q signal component in accordance with said cross correlation product; and means for adding one component with the adjustable gain of the other component to produce a phase-balanced signal.

The invention discloses a rapidly dissolved magnesium alloy with functional mechanical properties and a manufacturing method of the magnesium alloy. The magnesium alloy is prepared from alloys of binary Mg-M, ternary Mg-M-N or multi-element phase balance through melting. The material resistance of the alloy is limited, then the dissolution properties of the alloy can be predicted, and dissolutionresidues have no influence upon later dissolution process. The alloy can be rapidly dissolved, the dissolution velocity can be maintained within a predictable range, and abnormity caused by environment variation is avoided; in addition, mechanical property parameters such as tension resistance and/or yield strength and/or ductility are remarkably improved, and special requirements of different parts of equipment in complex underground construction application can be completely met.

The invention relates to a run-through type non-split-phase balanced power supply electrified railway traction system, belonging to the technical field of railway electric traction power supply. The system comprises traction transformators, all sections of traction networks and current equalizers, wherein, each section of traction power supply network is provided with an energy distribution regulating machine which mainly consists of a main controller, a driver, an electronic power switch bridgearm, a support capacitance arm, three electric current sensors, three voltage transducers and three reactors; A phase of the output end of each traction transformator is connected with the traction power supply network, B phase thereof is connected with the energy distribution regulating machines, and C phase thereof is connected with a steel rail; the main controller of each of the energy distribution regulating machine is connected with a control center. The invention has the advantages that split-phase power supply is changed into non-split-phase power supply, and great run-through of the traction contact network can be realized, so that safe, high speed and high-efficiency running of train can be guaranteed.

The invention discloses a method for producing lithium carbonate by separating magnesium out of low-lithium bittern and enriching lithium. The method includes the steps of converting salt lake bittern serving as raw materials into halide salt through evaporation dehydration and crystallization separation, directly extracting halide salt through trixylyl phosphate alkane ester or a mixture of trixylyl phosphate alkane ester and monohydric alcohol, obtaining an organic extraction phase and the rest of halide salt after solid-liquid separation, conducting back extraction on the organic extraction phase through water to obtain a low-magnesium-lithium-ratio lithium-rich solution, and obtaining lithium carbonate through condensation and alkalization magnesium removal. The method has the advantages that processes related to the solid-liquid extraction method are simple, co-extraction agents are not needed, the solute distribution drive force is large, and the method is not influenced by bittern extractant two-phase balance; multiple stages of extraction processes are conducted on halide salt, the extraction rate of Li+ is larger than 90%, and the mass ratio of magnesium to lithium in the extraction phase is remarkably decreased; phase splitting is easy due to liquid-liquid back extraction, and the back extraction rates of Li+ and Mg2+ are both larger than 90%; the extraction process is operated under the neutral or weak-acid condition, the production cost is low, and the method is particularly suitable for producing lithium carbonate after separating magnesium out of bittern with the magnesium-lithium mass ratio of 120 or lower.

The invention discloses a method for detecting volatile organic chlorides in resin by using headspace gas chromatography. The method specifically is a headspace gas chromatography (HS-GC) method for detecting residual epichlorohydrin (ECH) and a by-product, 1,3-dichloro-2-propanol (DCP), in a polyamide polyamine epichlorohydrin (PAE) solution. The method is based on a phase balance achieved by a closed headspace bottle before GC detection under the headspace conditions of 60 DEG C and 30 minutes. An experiment proves that a PAE matrix solution affects the phase balance of a to-be-detected substance. Therefore, the accuracy of the method is tested by adopting a standard addition method. The result shows that the method has relatively good precision (RSD is smaller than 2.90%) and accuracy (the recovery rate range is 93.6%-105%). Therefore, the method is suitable for analysis of volatile organic chlorides in a PAE resin solution.

The invention provides a method and a device for simulating black oil reservoir. The method comprises the following steps of according to component fluid seepage parameters, establishing a component model for describing a black oil reservoir fluid seepage rule; according to the required data for simulating black oil based on the black oil model, performing numerical discretization on the component model, so as to obtain a component number model based on a discrete network of a black oil reservoir geological model; according to fluid PVT (pressure-volume-temperature) data, establishing a component phase balance parameter list; according to the component phase balance parameter list and the evaluation values of the component fluid seepage parameters, performing flash calculation, so as to obtain the fluid phase state and applicable physical parameter; according to the fluid phase state and applicable physical parameter, adjusting the component number model; according to the evaluation values of component fluid seepage parameters and the adjusted component number model, calculating, so as to obtain the oil reservoir pressure change value and the saturation change value of each fluid phase; judging whether the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent or not; when the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent, calculating, so as to obtain the oil reservoir pressure and the saturation of each fluid phase. The method has the advantage that the extendability of oil reservoir number simulation architecture is improved.

A synchronous resolver has: a stator including a plurality of stator poles disposed at regular intervals along the circumferential direction of a ring-shaped stator base portion, the stator poles comprise a plurality of phases; coil bobbins former-wounded stator coils therearound are respectively fitted with and mounted on their associated ones of the stator poles; and, a rotor shiftable in angle with respect to the stator to thereby vary a reluctance component in a gap existing between the stator and the rotor, wherein the coil bobbins are set the positions of the stator coils freely in such a manner that the resolver signals of the respective phases balance well.

The invention discloses a research method for determining the intersecting position of a gas hydrate BSR (Bottom Simulating Reflection) interface and the sea bottom, and belongs to the technical fieldof gas hydrate exploration. According to the method, the intersecting position of the BSR interface and the sea bottom of a global sea area hydrate development zone can be accurately judged, and thusthe landward-side distribution boundary of a marine gas hydrate stabilization zone is mastered, namely, the shallowest water depth position of the hydrate stabilization zone. The method is simple tooperate and reliable in accuracy, does not consider geothermal gradient and sea water temperature variation curves, can work out the intersecting position by only utilizing sea bottom temperature andpressure parameters through combining hydrate phase balance conditions and has very high universality. If the method is applied to a hydrate development zone of the global sea area, the landward-sideshallow boundary of the global sea area hydrate stabilization zone is drawn, so that the research method has important significance for the research on the aspects such as sea bottom disasters, ecology and climate changes and can be widely applied to gas hydrate exploration.

The invention discloses a broadband waveguide magic-T power splitter, and relates to the technical field of microwave communication. The broadband waveguide magic-T power splitter comprises a T-shaped structure, an E-arm waveguide, a matching cylinder and four square connecting flanges, wherein both the upper inner surface and the lower inner surface of an arm H of the T-shaped structure are provided with a stepped structure in which multiple steps transiting from interior to exterior, the T-shaped structure is composed of a T-shaped structure upper block and a T-shaped structure lower block, the T-shaped structure upper block and the T-shaped structure lower block are the same in external contour, edges of the external contours of the T-shaped structure upper block and the T-shaped structure lower block are aligned and connected to form the T-shaped structure; and the lower inner surface, which directly faces to the arm H, of the T-shaped structure is provided with the matching cylinder at a junction of the arm H of the T-shaped structure and two branch waveguides. The broadband waveguide magic-T power splitter is simple in structure, convenient to process and high in reliability, port standing waves are less than 1.15 in the broadband with the relative bandwidth being 30%, the isolation degree is greater than 40dB, and the phase balance and the amplitude balance of a port of the power splitter are very well, thereby being suitable for acting as a power distribution or combination device for a broadband antenna in use.

The present invention relates to a nonlinear transformation-based phase-modulated signal frequency offset estimation and tracking method. According to the method, on the basis of theoretical analysison two-phase BPSK, four-phase balanced QPSK and unbalanced four-phase UQPSK modulated signals, primary nonlinear transformation or secondary nonlinear transformation is utilized to obtain symbol influence-removed radio frequency single-carrier signals, and therefore, preconditions are created for FFT (fast Fourier transform) spectrum analysis to realize carrier frequency offset estimation fast andaccurately. Compared with existing satellite technology which directly performs processing such as FFT spectrum analysis on phase-modulated signals, the method of the invention can assist solving technical shortcomings of dispersion of envelop spectrum peak points and large frequency offset estimation error and greatly improving the accuracy and real-time performance of frequency offset estimation and tracking of the phase-modulated signals, and has a bright application prospect in realizing carrier frequency offset estimation and tracking of phase-modulated signals of different links of a satellite.

The invention provides a high-temperature high-pressure gas-liquid balance testing device and method, and relates to the technical field of phase balance testing. The high-temperature high-pressure gas-liquid balance testing device comprises a balance kettle, a condenser and a buffering tank, a gas phase outlet is formed in the top of the balance kettle and is communicated with an inlet of the condenser, an outlet of the condenser is communicated with the buffering tank, a liquid phase outlet is formed in the bottom of the balance kettle, a gas phase inlet is formed in the top of the balance kettle, a liquid phase sampling pipe is arranged between the liquid phase outlet and the liquid phase inlet and is provided with a liquid phase sampling opening, a gas phase inlet is formed in the bottom of the balance kettle, and a gas phase sampling pipe is arranged between the gas phase inlet and the inlet of the condenser and is provided with a gas phase sampling opening. The high-temperature-high-pressure gas-liquid balance testing device and method solve the technical problem that an existing gas-liquid phase balance testing device cannot satisfy measurement of gas-liquid balance data athigh temperature and high pressure and have the advantages that gas-liquid dual circulation is adopted, the gas-liquid phase balance data can be measured within a wide temperature and pressure range,and the data accuracy is guaranteed.