471 results about "Stable phase" patented technology

The present invention relates generally to array oscillator circuits for use as phase delay generators. More particularly, the present invention relates to a novel array oscillator for providing a plurality of phases which have stable phase relationships. The present invention is particularly applicable to the generation of poly-phase clocks for receivers of very high speed interfaces which employ an over-sampling technique, or multiplexing, and for high speed logic. The array oscillator according to the invention comprises at least one ring oscillator having a plurality of at least two interconnected buffer stages including at least one, or any integer odd number of inverting stages and a series of non-inverting stages, wherein the buffer stages are formed of N-type MOSFET transistors.

A ferromagnetic tunnel junction structure comprising a first ferromagnetic layer, a second ferromagnetic layer, and a tunnel barrier layer that is interposed between the first ferromagnetic layer and the second ferromagnetic layer, wherein the tunnel barrier layer includes a crystalline non-magnetic material having constituent elements that are similar to those of an crystalline oxide that has spinel structure as a stable phase structure; the non-magnetic material has a cubic structure having a symmetry of space group Fm-3m or F-43m in which atomic arrangement in the spinel structure is disordered; and an effective lattice constant of the cubic structure is substantially half of the lattice constant of the oxide of the spinel structure.

An optical disk read signal processing system for Blu-ray disc systems to ensure stable phase-locked locked operation even with a low signal-to-noise ratio. This system changes a loop configuration of a phase lock loop circuit according to the operating state, and utilizes a FIR equalizer for phase detection. This system attains a low error rate even when the signal-to-noise ratio of an input signal is low, and avoids pulse edges with low phase detection accuracy or signal pulse streams with a high possibility of being mistakenly detected as an edge in conventional methods, and also supports diverse types of input signals.

The invention relates to a direct prestack time migration method for the seismic data acquired under the undulant ground surface. The method is applied to reflection seismic data processing during earthquake exploration and is a prestack migration imaging method aiming at the seismic data acquired under the undulant ground surface. The method can be directly applied to the seismic data which is acquired under the undulant ground surface and is acquired at shot points and demodulation points of different heights. Accordingly, the method can avoid errors caused by field static correction processing as well as correct the speed of a speed reducing belt in a migration process. The method can self-adaptively determine time-varying migration aperture and can correctly compensate geometric spreading effect of seismic waves during an imaging process so as to obtain an amplitude-preserved common reflection point gather. The core of the method is to use a one-way wave theory and a stable phase point principle to analyze so that the travel time and the amplitude of the seismic waves, which depend on the speed and thickness of the speed reducing belt, the heights of the shot points and the demodulation points, and stacking speed based on a floating datum plane, are obtained. The method has important application value for the explorations of oil, gas and mineral resources in areas with complex ground surfaces.

In a semiconductor storage device such as a phase change memory, a technique which can realize high integration is provided. The semiconductor storage device includes a phase change thin film 101 having two stable phases of a crystal state with low electric resistance and an amorphous state with high electric resistance, upper plug electrodes 102 and 103 provided on one side of the phase change thin film 101, a lower electrode 104 provided on the other side of the phase change thin film 101, a selecting transistor 114 whose drain / source terminals are connected to the upper plug electrode 102 and the lower electrode 104, and a selecting transistor 115 whose drain / source terminals are connected to the upper plug electrode 103 and the lower electrode 104, and a first memory cell is configured with the selecting transistor 114 and a phase change region 111 in the phase change thin film 101 sandwiched between the upper plug electrode 102 and the lower electrode 104, and a second memory cell is configured with the selecting transistor 115 and a phase change region 112 in the phase change thin film 101 sandwiched between the upper plug electrode 103 and the lower electrode 104.

The invention relates to high heat conducting compound phase change energy storage material and the preparing method. The material is compounded by inorganic metal multi-hole consecutive material, phase change energy storage material which is solid-liquid phase change one, and hole sealing material. The preparing method includes the following steps: using inorganic metal multi-hole consecutive material as carrier, solid-liquid phase change energy storage material as functional material; dipping the cleaned carrier into liquid state functional material to make it absorb fully; cooling curing and sealing hole. The material has the features of high heat conducting ratio, easy forming, stable phase change temperature, high chemical stability. The preparing method is economic, convenient, practical, and easy generalization application. The invention can be used in high performance cooling plate making, solar energy storage, waste heat utilizing etc.

The invention discloses a flame retardant form-stable phase-change material and a preparation method thereof. The method is characterized in that 50-60 percent (accounting for the mass percentage of the whole system) of paraffin, 15-20 percent of intumescent flame retardant, and 1-10 percent of metal powder are mixed evenly and then added into 15-20 percent (accounting for the mass percentage of the whole system) of molten high-density polyethylene; after melting and blending, the obtained mixture is melted and extruded by an extruder, and carries out granulation and molding, so as to obtain the flame retardant form-stable phase-change material in a space mesh structure which is formed by the intumescent flame retardant, the paraffin and the metal powder that dispersed in the high-density polyethylene evenly. As the invention adopts synergistic flame retardance of the intumescent flame retardant and the metal powder, the addition of the intumescent flame retardant is greatly reduced, the flame retardance and the thermal conductivity of the form-stable phase-change material is improved, and the popularization and application of the phase-change material in the industries of building energy-saving materials, solar energy storage materials and heat storage tempering textile materials can be greatly expanded.

The invention discloses a nonionic aqueous polyurethane emulsion and a preparation method thereof, belonging to the technical field of high-molecular materials. The nonionic aqueous polyurethane emulsion comprises polyether polyol or polyester polyol, isocyanate, micromolecular chain extender, nonionic hydrophilic chain extender, hydrophilic chain extender, 0.6-1 weight portions of cross-linking agent, lower boiling point solvent, catalyst, amine neutralizer, amine chain extender, 0.4-2 weight portions of aqueous wetting agent, and aqueous levelling agent. The preparation method is characterized in that: prepolymerization, polymerization, emulsification, distillation, compounding are carried out to prepare the nonionic aqueous polyurethane emulsion, then the aqueous wetting agent and aqueous levelling agent are added with stirring to obtain an aqueous nonionic polyurethane glass fibre impregnating compound. The prepared nonionic aqueous polyurethane emulsion disclosed herein has the advantages of good stability, long stable phase, wide application scope, high strength, wear resistance, good elasticity, yellow stain resistance, aging resistance, solvent resistance, low temperature resistance, tortuosity resistance, good penetration, compatibility, good interface chemical combination or chemisorption and other excellent performances.

The present invention discloses a high-performance, low-cost, environmentally-friendly novel building wall polymer heat insulation dry-mixed mortar material which is provided with phase change energy storage and thermostat function. The invention is a polymer heat insulation dry-mixed mortar material that introduces the phase change energy storage aggregate of organic phase change material polymer. The invention adopts a two-step technology, namely, first, the highly-stable phase change energy storage aggregate with high heat capacity is manufactured; second, the phase change energy storage aggregate is used to confect the building wall polymer heat insulation mortar by suing the modern concrete dry-mixing technology. The preparation technology is simple, safe and environmentally friendly, and is easy to implement and control, which will help promote the application of industrialization. The building wall polymer heat insulation mortar solves the key technical problem of the combination between organic phase change materials and common building materials and eliminates the compact of organic phase change materials on the mechanical and fire-proofing performances of the buildings. The building wall polymer heat insulation mortar is provided with high cycle working stability, high organic introduction amount of phase change materials, low thermal conductivity coefficient, high thermal storage coefficient, extremely excellent thermal insulation performance and temperature adjustment function.

The invention relates to a three-dimensional gel network carrier and a form-stable phase change composite material which adopt fatty acid (hydrocarbon), polyethylene glycol and other organic phase change materials as work material and use poly-(N-hydroxymethyl)-acrylamide heat-shrinkable interpenetration network as form-stable carrier. The preparation method of the phase change composite material comprises the following steps: firstly adopting low temperature eutectic method to select multiple components composite phase change material with proper phase change temperature, high phase change enthalpy and low cost, designing and determining the preparation method of the interpenetration network carrier and the addition mode of the composite phase change material and the combination mode of the carrier, preparing the form-stable phase change composite material based on multiple actions of bonding, physical adsorption and network confinement, cooling and grinding to obtain the form-stable heat storage functional particles. The form-stable phase change composite material containing 50%-75% of material can be prepared by the method, the maximum phase change enthalpy can be up to 110J / g, and the form-stable phase change composite material prepared by the method can be directly applied in the textile field, building field, military field, etc.

The invention relates to a microscale Al-containing rare earth wrought magnesium alloy and its preparation method and belongs to the scope of industrial magnesium alloy. The magnesium alloy comprises, by weight, 6.5-15.0% of Gd, 3.0-5.5% of Y, 2.0-4.0% of Zn, 0.3-1.5% of Nd, 0.3-0.9% of Zr, 0.4-1.0% of Al and the balance of Mg. The preparation method of the magnesium alloy comprises the steps as follows: raw material preparation, alloy melting, alloy semi-solid extrusion, homogenization treatment, redeformation, cooling and pre-stretching treatment, ageing strengthening treatment and the like. By fully utilizing the defect that Al is preferentially combined with rare earth and Zr in alloy to form a stable phase, Zn element is added to make up insufficiencies and the wrought magnesium alloy with high performance is prepared. The recovery effect of rare earth elements is enhanced, and semi-solid forming and solid plastic forming are combined.

The invention discloses a method for preparing shape memory polyurethane resin. Polyethylene glycol is added during synthesis, and polyether diol or polyester diol is added as a soft segment; and the shape memory polyurethane resin is synthesized by a mass polymerization method. Compared with the shape memory polyurethane resin with single polyethylene glycol or polyether diol or polyester diol as the soft segment, the polyurethane resin prepared by the method has the characteristics of good shape memory effect, high phase change thermal insulation performance, high mechanical performance and the like; the shape memory recovery rate can reach 88%, the permanent deformation rate can reach 95%, the tensile strength at break can reach 20 MPa and the elongation at break can reach 75%; and meanwhile, a stable phase change enthalpy is kept, the requirements of spinning-level resin are met and the shape memory polyurethane resin can be directly spun and formed.

The invention discloses a PIlambdaDmu controller parameter setting method based on a parameter stability domain. The method includes the following steps: judging if the input and the output of a controller system are stable, then determining parameter stability domain boundary curves at phase margin upper limit and at the position of phase margin appearing, determining a value range of two boundary curve frequency on the condition of ensuring parameters with practical significance, confirming the range of parameter Ki and Kp in the stability domain on the boundary curve, inserting a plurality of points on two boundary curves, determining a plurality of groups of points which are equal in Kp value respectively on the two boundary curves, obtaining a value range of Ki corresponding to the plurality of groups of points, determining an optimum value of Ki corresponding to each group of points by adopting a genetic algorithm, and finally determining an optimal solution through integral time absolute error (ITAE). According to the PIlambdaDmu controller parameter setting method based on the parameter stability domain, stable phase margin of a system and dynamic characteristics are both considered, and controller parameters are set by means of the genetic algorithm. A controller which is set by using the method can well control a system on the condition of meeting given stable phase margin, and therefore the fact that a system has better dynamic characteristics is guaranteed.

In a method of forming a chalcogenide compound target, a first powder including germanium carbide or germanium is prepared, and a second powder including antimony carbide or antimony is prepared. A third powder including tellurium carbide or tellurium is prepared. A powder mixture is formed by mixing the first to the third powders. After a shaped is formed body by molding the powder mixture. The chalcogenide compound target is obtained by sintering the powder mixture. The chalcogenide compound target may include a chalcogenide compound that contains carbon and metal, or carbon, metal and nitrogen considering contents of carbon, metal and nitrogen, so that a phase-change material layer formed using the chalcogenide compound target may stable phase transition, enhanced crystallized temperature and increased resistance. A phase-change memory device including the phase-change material layer may have reduced set resistance and driving current while improving durability and sensing margin.

An on-chip response adjuster is based on an on-purpose generated and dominant transfer pole or zero of a signal response so as to provide a process-stable phase behavior of the circuitry. The signal response is defined directly by a passive frequency variant component (Lfold) and by transistor operation point, e.g. biasing, of a transistor configuration (Qcas,Qaux). As a result, electrically controlled signal response adjusters can be provided with fully integrated, single-chip integrated or system-on-chip (SoC) techniques.

The invention relates to a method and a system for improving phase stability of a photon microwave signal. The method comprises the following steps that: light output by a laser device is divided into two beams of vertical polarized light by a polarized light beam splitter; a reference light is combined with transmission light via a polarized light beam combiner after frequency-shift, and passes through the polarized light beam splitter after passing through a light micro-wave modulation and a light delay link, finally the reference light is interfered by the transmission light after being rotated and polarized by a faraday rotation mirror, and then a beat frequency signal is detected through a low-speed photodetector; the beat frequency signal is subjected to phase comparison with a 25MHz reference signal to obtain a phase disturbance situation of a transmission system, and the signal output by a phase discriminator is used as a control signal of a microwave photonic phase shifter after being processed. The system comprises a DFB (distributed feedback) laser device, the polarized light beam splitter, an acoustooptic frequency shifter, the polarized light beam combiner, an RF (radio frequency) signal generator, a Mach-Zehnder modulator, the photon microwave signal phase shifter, the polarized light beam splitter, an optical interferometer, a low-frequency optical receiver phase discriminator and a proportion integrator.

A method for limiting a transfer of an additive in a first polymeric article to a second adjacent polymeric article comprises treating at least a portion of the first article under a condition such that the additive is transformed to a substantially stable phase. A polymeric article comprises a compounded polymeric material that comprises an additive in a base polymeric material, wherein the additive exists in a substantially stable phase.

The invention provides a quadruplicated frequency signal optical fiber arbitrary point steady-phase distribution system based on phase conjugation and belongs to the technical field of optical fiber steady-phase distribution; the system comprises an annular optical fiber link structure mainly composed of a local end, n far-end stations, n +1 sections of optical fiber links and n optical fiber couplers, wherein the local station comprises a microwave source, a dual-carrier wave optical signal generating module, a phase conjugated optical signal generating module, an optical fiber coupler, a first photoelectric detector and an optical fiber circulator; and each of the far-end stations respectively comprises an electro-optical frequency mixing module, an optical amplifier, a second photoelectric detector, an electric amplifier and an electric filter. The main device used by the system is a photonic device; due to the high-frequency broadband characteristic of the photonic device, the system can achieve optical fiber long-distance stable phase distribution of higher frequency signals; and the problem of deterioration of the phase stability precision caused by local oscillator leakage and harmonic interference introduced when an electric mixer is used is effectively avoided.

The invention relates to the technical field of radar electronic countermeasures, and discloses a single-pulse tracking and guiding radar coherent jamming method based on target range profile template matching. The method is characterized in that frequency domain response of an all-attitude angle target is established on an operating frequency of a typical airborne single-pulse tracking and guiding radar, and database construction of an all-attitude angle extended target range profile is completed; parameter measurement, feature extraction and signal reconstruction are carried out on radar signals when a ship-borne electronic support measure (ESM) reconnaissance system reconnoiters transmitting signals of the airborne tracking and guiding radar; a ship-borne jammer carries out matching processing on reconstructed signals and scattering properties of a protected target, additional phase shift and time delay parameters are set, and jamming signals which have a stable phase relation with target echoes are generated. The single-pulse radar coherent jamming method is applicable to jamming devices on various platforms of ships, airplanes and the like, a self-defense electronic jamming ability is provided in allusion to an extended target, and the single-pulse tracking and guiding radar is enabled to create a good angle deception jamming effect.

The invention provides a phase decoding method, a phase decoding device and a quantum secret key distribution system. The method includes splitting an incident input light pulse into a first transmission light pulse and a second transmission light pulse through polarization; performing phase decoding on the first transmission light pulse and the second transmission light pulse respectively, wherein two sub output light pulses are acquired after phase decoding of each transmission light pulse; combing any sub output light pulse of the first transmission light pulse after phase decoding with anysub output light pulse of the second transmission light pulse after phase decoding into an output light pulse through polarization. By the method, influences of random light pulse polarization statechanges on system stability can be effectively solved, and stable phase decoding of environmental disturbance immunity of transmission optical fibers is realized. An unequal-arm Mach-Zundel interference ring is adopted, and light pulses only need to pass a phase modulator once during decoding, so that insertion losses of a receiving terminal are reduced greatly, and system efficiency is improved remarkably.

Disclosed is an uninterruptible power supply, including a rectifier for generating a DC voltage; an energy storage unit; an inverter for converting the DC voltage into a three-phase modulating voltage; a filter; a bypass switch circuit for selectively outputting a three-phase AC voltage or the three-phase modulating voltage as a three-phase load voltage; and a control circuit for controlling the operation of the uninterruptible power supply. The control circuit may use a flux compensation block with different operating modes to adjust the three-phase load voltage at the startup phase of a second inductive load and at the stable phase of the second inductive load, thereby compensating or correcting the flux of the second inductive load to prevent the flux distribution of the second inductive load from being saturated.

Memories, clock synchronization circuits, clock synchronization controller circuits, and methods for setting a voltage controlled delay of a clock synchronization circuit and tracking and recording the control voltage are disclosed. For example, a clock synchronization controller provides an initial control voltage to the voltage controlled delay during initialization of the synchronization circuit until a phase dependent control voltage stabilizes. The stable phase dependent control voltage is substituted for the initial control voltage. Following stabilization of the phase dependent control voltage, a phase detector of the clock synchronization circuit is activated. A recovery control voltage is provided by the clock synchronization controller to the voltage controlled delay during recovery of the clock synchronization from a power-saving mode until the phase dependent control voltage stabilizes.

The invention relates to a wireless remote physiological signal monitoring and processing system and a control method thereof. A physiological information acquisition module at a client is connected with a wireless sensor gateway node by a first wireless sensor emitting module in a wireless communication mode; the wireless sensor gateway node is connected with a data server by a wired network interface; and an equipment parameter acquisition module at the client is connected with the wireless sensor gateway node by a second wireless sensor emitting module in the wireless communication mode. The method comprises the following steps of: acquiring human body physiological information and equipment status information; preprocessing the information, performing characteristic matching on the information, and dividing the condition of a patient into stable phase monitoring and acute developing phase pre-warning; and if the patient is under the stable phase monitoring and the condition of thepatient is not improved, prompting a doctor to modify a prescription, and storing the data of patient information at the same time. By using the wireless remote physiological signal monitoring and processing system and the control method thereof, monitored persons can break away from the limit of the traditional monitoring mode, the life quality of the monitored persons is improved, and the doctors can remotely and effectively guide the patients.

A multimode occulting antenna with a stable phase center comprises a reflection cavity, a lower radiation paster, an upper radiation paster, four feed probe sleeves, four feed probe inner cores and two support columns. Each feed probe sleeve comprises a metal seat and filler, one end of the metal seat is a metal column, the other end of the metal seat is a cylindrical metal cavity, and the filler is used for filling the cylindrical cavity of the metal seat. The sleeve-shaped probes are coupled with feed through four points, probes are uniformly distributed on the circumference, an aerial radiation paster consists of an upper layer and a lower layer, the lower layer is coupled with the feed through the sleeve-shaped probes, the upper layer is coupled with the feed through the lower radiation paster, the middle is supported by the metal support columns, and the reflection cavity is of a round bowl-shaped structure and higher than the upper radiation paster. The occulting antenna is excellent in performance and structure, simple and reliable in process, wide in frequency band, capable of meeting use requirements of a GPS (global positioning system), BD-2, GALILEO and GLONASS, wide in beam coverage, high in gain, stable in phase center, excellent in axial ratio performance, and applicable to a precise obscuration detection system and other high-precision detection systems.

The invention discloses a method for improving compactness of aluminum alloy micro-arc oxide coating, and belongs to the technical field of aluminum alloy surface modification. The method comprises the following steps of: grinding an aluminum alloy sample to be smooth, ultrasonically cleaning the aluminum alloy sample, putting the ultrasonically-cleaned aluminum alloy sample into electrolyte to perform micro-arc oxidization treatment, thereby preparing an aluminum-alloy micro-arc oxidation coating; and finally, performing laser scanning processing on the aluminum-alloy micro-arc oxidation coating by high-energy laser beams generated by laser unit equipment. The method disclosed by the invention can improve the structure of the aluminum-alloy micro-arc oxidation coating, so that a metastable phase in the coating is converted into a stable phase. The method effectively improves the problems that compaction of the coating is relatively poor as a result of porous characteristics, and the energy consumption for obtaining the micro-arc oxidation coating with good compactness is high, so that corrosion and wear resistance of the micro-arc oxidization coating is greatly improved; and moreover, the method is simple in process, is good in repeatability, and can be used for industrial large-area preparation.

The invention provides a phase decoding method, a receiving device and a quantum key distribution system. The method comprises the steps that an incident input light pulse is subjected to polarizationsplitting to be split into a first transmission light pulse and a second transmission light pulse; each of the first transmission light pulse and the second transmission light pulse is subjected to phase decoding and then output through two associated light sub-paths; an output light pulse from one of the two light sub-paths associated with the first transmission light pulse is directly output for detection, and an output light pulse from one of the two light sub-paths associated with the second transmission light pulse is directly output for detection. According to the method, the influencesgenerated on the system stability by random changes of the light pulse polarization state can be effectively solved, and stable phase decoding capable of resisting environment interference is achieved; and in addition, an unequal-arm Mach-Zehnder interferometer can be adopted, the light pulse only needs to pass through a phase modulator once during decoding, the insertion loss of the receiving end is reduced, and the system efficiency is improved.

The invention discloses a preparation method for a high stable paraffin melamine resin microcapsule emulsion which can be used for phase variable temperature. The method comprises the following steps: preparing a paraffin melamine resin microcapsule product by adopting an in-situ polymerization method with paraffin as a phase transition core material and melamine resin as a capsule wall material; directly adding a compound emulsifier and deionized water to the microcapsule product suspension to obtain a mixed liquor, or adding a compound emulsifier and deionized water to the microcapsule product after the microcapsule product is filtrated and dried to obtain a mixed liquor; and stirring and dispersing the mixed liquor to prepare the paraffin melamine resin microcapsule phase transition material emulsion. Particle size of the paraffin melamine resin microcapsule phase transition material emulsion prepared in the invention is micron-sized, and the microcapsule content can reach 5-38%. The phase transition material emulsion has the advantages of stable property, high resistance to acid and base environment and big enthalpy of phase transition, and the phase transition material emulsion is not easily demixed. The phase transition material emulsion can be widely applied to fields of latent functionally thermal fluid, building energy-saving materials and thermal-storing, temperature-regulated textile materials and the like.

The invention provides a phase-locking loop rapid locking circuit and method. The phase-locking loop rapid locking circuit is provided with two loops of a broadband wide loop filter and a narrowband wide loop filter. At the beginning, the broadband wide loop filter is used as a loop filter in a phase-locking loop; the controlled voltage presetting is simultaneously carried out on the broadband wide loop filter and the narrowband wide loop filter so that a frequency difference in a phase discriminator in the phase-locking loop is rapidly reduced to a smaller value; and the smaller the frequency difference is in the process, the shorter the time used in the capturing phase T1 is. After the voltage presetting of the broadband wide loop filter is stable, the broadband wide loop filter carries out voltage presetting on the narrowband wide loop filter, and thereby, the narrowband wide loop filter obtains accurate preset controlled voltage, and the narrowband wide loop filter is used as a loop fiber in the phase-locking loop. The narrowband wide loop filter used by the phase-locking loop in the final stable phase adopts a narrowband wide loop, therefore, the phase noise of the phase-locking loop can not be deteriorated.