20results about How to "High phase stability" patented technology

The invention provides a method for reducing light source phase noise in a double-field quantum key distribution system, which combines an optical phase-locked loop (OPLL) and a proportional integral (PI) control technology, and comprises the following steps of: firstly, performing beat frequency on laser signals of light source ends Alice and Bob, and realizing frequency locking and phase synchronization of a laser through the OPLL; on the basis, the system introduces frequency deviation through an acousto-optic modulator (AOM) to ensure the stability of a beat frequency signal. Further, the system couples the optical signals after frequency beating through an optical beam splitter, and detects the power of the coupled optical signals. The detected power value is transmitted to the FPGA control module to serve as an input parameter of PI control, a proportionality coefficient and an integral coefficient are adjusted in real time, a feedback control signal is generated and used for dynamically adjusting a front phase modulator of a receiving end Bob, and therefore the phase noise of a light source end is effectively reduced.

According to the preparation method of the ferric sodium pyrophosphate positive electrode material with the double-layer carbon structure, double-layer carbon layers can be formed through respective coating of different carbon sources, and different carbon layers have different structure types, so that the material has higher phase stability and excellent ionic conductivity, and particularly, through a secondary spraying method, the material can be prepared into the ferric sodium pyrophosphate positive electrode material with the double-layer carbon structure. The high-molecular polymer is coated to form the inner carbon layer during first spraying, the organic matter low molecules are coated to form the outer carbon layer during second spraying, a multi-coating effect is formed, the inner carbon layer is compact and can avoid excessive side reactions between an electrolyte and a positive electrode material, so that the cycle performance is improved, and the outer carbon layer is used for supplementing defects of the inner carbon layer; and meanwhile, as an ion transmission channel between particles, the electrolyte is further prevented from being contacted, so that the conductivity is improved.

The invention discloses a converter instantaneous power stabilization control method and system under an electromagnetic scale, and the method comprises the steps: enabling the active power and reactive power of a converter to serve as an active power reference value and a reactive power reference value, and inputting the active power and reactive power into a power control loop of the converter, and obtaining an output current reference value of the converter; wherein the active power of the converter changes along with the change of the voltage amplitude of the capacitor; the reactive power of the converter changes along with the change of the capacitor voltage phase. By establishing the control logic between the reactive power output by the converter and the capacitor voltage phase and the control logic between the active power output by the converter and the capacitor voltage amplitude, the reactive power and the active power output by the converter are actively adjusted, and the phase stability and the energy stability of the new energy grid-connected system can be improved.

The invention relates to the technical field of thermal barrier coating materials, in particular to a solid-phase sintering preparation method of a lanthanum-samarium-niobium-based high-temperature-sintering-resistant high-entropy thermal barrier coating, which comprises the following steps: chemical element substitution is carried out on an A site of an A2B2O7 type oxide, the high-entropy thermal barrier coating material is (La0. 2Sm0. 2Nb0. 2A0. 2B0. 2) 2Zr2O7, and A and B are different rare earth elements except La, Sm and Nb. High-entropy design is adopted, so that the thermal barrier coating material can stabilize the phase structure of the material at a high temperature, segregation is not prone to being generated, the anti-sintering performance of the material is remarkably improved, the application requirement of an aero-engine at the temperature of 1,300 DEG C or above is met, the high-entropy thermal barrier coating does not generate phase change after long-term heat treatment at the high temperature, and the thermal barrier coating material has the good thermal barrier performance. High phase stability is maintained, and the service life of the coating can be prolonged.

The invention discloses a thermal barrier coating resistant to high-temperature oxidation and a preparation method thereof, and relates to the technical field of thermal barrier coating materials. According to the preparation method, a NiCoCrAlYHfRu coated coating is prepared on a high-temperature alloy by adopting arc ion plating equipment, and a YSZ / LaZrCeO ceramic surface layer is prepared by adopting electron beam physical vapor deposition equipment. The thermal barrier coating prepared through the technology has a unique columnar crystal structure and meanwhile has good thermal cycle performance. Finally, the anti-oxidation and anti-corrosion requirements of the turbine blade can be met; and the process is simple, industrial production is easy to achieve, and the composite coating is excellent in performance, has application prospects and is suitable for the high-temperature alloy.

The present invention relates to a cosmetic composition for blocking ultraviolet rays, which contains a water-soluble organic ultraviolet ray blocking agent and a water-soluble thickening agent in a water phase and contains an oil-soluble organic ultraviolet ray blocking agent and an oil thickening agent in an oil phase, thereby preventing uniting of emulsified particles of an oil-in-water (O / W) dosage form. According to the present invention, the problem of phase separation due to long-term storage or high-temperature storage is solved, phase stability is improved, and since only the organic ultraviolet blocking agent is contained, clouding is significantly reduced, a sufficient ultraviolet blocking index is exhibited, and a feeling of use is excellent.

The present invention relates to: a negative electrode slurry containing a negative electrode active material, single-walled carbon nanotubes (SWCNTs), an organic binder, and an organic solvent; a negative electrode containing the negative electrode slurry; and a lithium secondary battery. The negative electrode slurry contains a negative electrode active material using silicon-based particles having a high charge / discharge capacity, generates little hydrogen gas during the production and storage of the slurry, and achieves an excellent capacity retention rate during charge / discharge.

The application belongs to the field of aero-engine gas path sealing, and discloses a gradient-structure double-ytterbium silicate high-temperature seal coating and application. The seal coating comprises a barrier layer, a transition layer and an abradable surface layer which are sequentially sprayed on a to-be-sprayed base body along the thickness direction of the seal coating; the porosity of the barrier layer is 1-9%; the porosity of the transition layer is 9-18%; the porosity of the abradable surface layer is 18-30%; and the spraying feed powder of the barrier layer, the transition layer and the abradable surface layer is Yb2Si2O7-based powder. The coating has the characteristics of gradient distribution of porosity, high-temperature resistance, CMAS corrosion resistance, moderate hardness and high bonding strength.

The invention relates to the technical field of castable, in particular to high-performance tundish cover castable based on high-aluminum ceramic chip recycled aggregate and a preparation method of the high-performance tundish cover castable. The castable comprises high-aluminum ceramic chip recycled aggregate, modified hollow alumina microspheres, andalusite and other components, and through roasting stabilization treatment of the recycled aggregate and multi-layer coating modification of the microspheres, the problems of poor heat preservation property and concentrated thermal stress caused by high doping amount of the recycled aggregate are solved. The andalusite cooperates with the modified microbeads to optimize aggregate-andalusite-microbead three-phase interface combination by virtue of the low-expansion characteristic and the active surface, so that the thermal shock resistance and the structural compactness are enhanced. The product has excellent heat preservation and heat insulation performance, high strength and slag corrosion resistance, resource efficient utilization of waste high-aluminum ceramic chips is achieved, and the service life of the tundish cover is prolonged.

The utility model relates to a cable, in particular to a high-power low-loss radio frequency cable for a chariot radar. The utility model aims to provide the high-power low-loss radio frequency cable for the chariot radar, and the cable has the functions of low attenuation, high power and external electromagnetic interference resistance, and has the characteristics of light weight and high flexibility. According to the technical scheme, the high-power low-loss radio frequency cable for the chariot radar is characterized by comprising a cable core, an inner shielding layer, a middle layer, an outer shielding layer and an outer protection layer, the cable core comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which sequentially wrap the conductor from inside to outside.

The invention discloses a low-profile broadband large-sweep-angle patch antenna. The patch antenna comprises a first dielectric layer; a second dielectric layer; a third dielectric layer; a radiation layer; the radiation layer comprises a main radiation patch, and the edge of the main radiation patch is provided with a coupling notch; the feed network is arranged in the third dielectric layer; a feed probe; the feed probe comprises a feed probe vertical branch and a feed probe horizontal branch; the other end of the vertical branch of the feed probe is electrically connected with the output port of the feed network, the horizontal branch of the feed probe and the main radiation patch of the radiation layer are coplanar, the front end of the horizontal branch of the feed probe is located in the coupling notch of the main radiation patch to form a coupling gap, and the feed probe feeds the main radiation patch through the coupling gap. According to the low-profile broadband large-sweep-angle patch antenna, the H-plane scanning angle can reach 0 + / -60 degrees, the working frequency band covers 6.8-12.4 GHz, the working bandwidth reaches 58.3%, and meanwhile the low-profile broadband large-sweep-angle patch antenna has the advantages of being low in profile and stable in structure.

The application relates to the technical field of plant beverage processing, and discloses a compound star anise liquor and fructooligosaccharide beverage and a preparation process thereof, which is prepared from 11.8wt%-19.6wt% of star anise liquor extract, 8wt%-15wt% of fructooligosaccharide, 0.1wt%-0.3wt% of anhydrous citric acid, potassium sorbate, sodium ascorbate and purified water; the process comprises the following steps: preparing high-concentration fructooligosaccharide syrup by using part of the purified water, adding the extract and sodium ascorbate into the fructooligosaccharide syrup to obtain a high-viscosity complex mother liquor, sterilizing and rapidly cooling the mother liquor under near-neutral conditions, preparing a deep quenching liquid by mixing the remaining purified water, anhydrous citric acid and potassium sorbate, and synchronously colliding and mixing the cooled mother liquor and the deep quenching liquid to carry out sterile filling. The application improves the dispersion state of the hydrophobic components by using a local high-concentration polysaccharide environment, decouples the heating sterilization process and the acid adjusting process, effectively inhibits polysaccharide hydrolysis and essential oil coalescence, and improves the physical and chemical stability of the finished product.

The invention discloses a perovskite crystalline silicon laminated solar cell structure, a preparation method and a cell. Comprising a first metal electrode layer, a first conductive layer, a first hole transport layer, a first passivation layer, a second passivation layer, a third passivation layer, a first electron transport layer, a second conductive layer, a second hole transport layer, a first interface modification layer, a power generation layer, a second interface modification layer, a second electron transport layer and a third conductive layer which are sequentially arranged from bottom to top. A second metal electrode layer; according to the invention, the interface between perovskite and PTAA is adjusted by using multiple bonding interaction of the APC material, so that charge transfer is enhanced and interface non-radiative recombination is inhibited; the HCOOK solution is used for reducing the defect concentration so as to improve the phase stability; the uniform surface passivation effect can be realized by performing steam treatment on the cell by using ICL, so that the whole film can uniformly show long photoluminescence life in a large area.

The invention relates to a method for preparing a perovskite wafer based on physical hot pressing and application thereof. According to the method, physical hot pressing assistance and conductive polymer modification methods are adopted, that is, in the process of preparing the FAPbI3 wafer through a mechanical pressing method, an external heating field and conductive polymer modification are synchronously introduced. And the crystallinity of the wafer is improved by the thermal field with proper temperature, and finally the compact perovskite wafer with high crystallinity is obtained. The wafer obtained by the invention can be used for a high-sensitivity near-infrared (NIR) photoelectric detector, and shows excellent photoelectric properties in a near-infrared light band.

The invention belongs to the technical field of advanced ceramic material preparation, and particularly discloses high-performance nearly-spherical zirconium oxide feeding powder and a preparation method thereof, and the method comprises the following steps: (1) preparing composite precursor liquid; (2) graded controllable thermal conversion; and (3) post-treatment: carrying out heat treatment on the product obtained in the step (2) in an oxidizing atmosphere at 500-700 DEG C for 0.5-3 hours to obtain the zirconium oxide powder. The special structure powder with the dense outside and the inner holes is prepared. The smooth and compact surface endows the powder with excellent fluidity; the internal uniform closed nano-pores properly reduce the particle density and further facilitate flowing, and more importantly, the pores can partially absorb a binder during feed preparation and play roles in'internal stress buffering 'and binder distribution optimization, so that higher powder loading capacity is allowed under the same viscosity, and the feed preparation efficiency is improved. Or lower viscosity and better rheological property can be obtained under the same loading capacity.

The invention belongs to the technical field of optical fiber transmission radio frequency signals, and relates to an optical fiber transmission radio frequency signal phase correction method comprising the following steps: an optical emission circuit converts a received radio frequency signal into a first optical signal, and transmits the first optical signal into an optical fiber; the power combiner forms a first radio-frequency signal from the received radio-frequency signal through a radio-frequency cable, and transmits the first radio-frequency signal to the first phase acquisition circuit; the optical fiber converts the received first optical signal into a second optical signal after passing through an uncertain temperature area, transmits the second optical signal to the optical receiving circuit, converts the second optical signal into a second radio frequency signal, and transmits the second radio frequency signal to the second phase acquisition circuit. A radio frequency cable is used as a phase reference to correct the phase change of multiple paths of optical fibers in the transmission process. The method combines the advantages of high phase stability of the radio frequency cable, small optical fiber size, light weight and strong anti-interference capability.

The invention belongs to the technical field of broadband antennas, and particularly relates to a broadband and low-insertion-loss millimeter wave reconfigurable reflection unit based on an HTCC technology. The HTCC multi-layer wiring ceramic tube shell comprises an HTCC multi-layer wiring ceramic tube shell, a unit metal circuit sheet is installed in the HTCC multi-layer wiring ceramic tube shell, the unit metal circuit sheet is connected with a plurality of pin switching diodes, a direct current control branch knot is arranged in the tube shell, the other end of the direct current control branch knot penetrates out of a cavity of the HTCC multi-layer wiring ceramic tube shell, and the other end of the direct current control branch knot is connected with the pin switching diodes. A round pad for welding a ball grid array (BGA) ball is formed at the bottom of the HTCC multilayer wiring ceramic tube shell, the tube shell is further provided with a plurality of quartz plane spiral inductors, the quartz plane spiral inductors are respectively connected with unit metal circuit sheets and direct current control branches through gold wires, an opening of the tube shell is connected with a metal cover plate, and the metal cover plate is connected with a metal wire. And a metal short circuit column is connected between the center of the unit metal circuit sheet and the metal cover plate. The invention provides a broadband and low-insertion-loss millimeter wave reconfigurable reflection unit based on an HTCC technology.

The present application relates to an electrode composition for a lithium secondary battery, an electrode slurry comprising the same, an electrode, and a lithium secondary battery, the electrode composition comprising: an electrode active material; a conductive material; and a binder, in which the binder is a copolymer of a (meth) acrylamide monomer, a (meth) acrylic monomer, an acrylonitrile monomer, and a metal-substituted (meth) acrylic monomer, and satisfies specified relational expressions (I) to (III). According to the invention, the problem of volume expansion during repeated charging and discharging can be solved.

The invention discloses a quantum remote cloning method and system based on an integrated photon chip, and the method comprises the steps: dividing pump light into two paths, and respectively coupling the two paths to enter a transmitting end chip and a receiving end chip; idle photons and unknown quantum state photons to be cloned are generated in the sending end chip; photons C1, C2 and P are obtained in the receiving end chip, and the obtained photon P is coupled to the sending end chip; in a sending end chip, unitary transformation of phase adjustment or basis vector transformation is carried out on unknown quantum state photons to be cloned, X0 and X1 are obtained, and on-chip Bell state measurement is carried out on X0, X1 and P after X0 passes through a thermal modulation phase shifter; according to an on-chip Bell state measurement result, information of an unknown quantum state X to be cloned is non-locally distributed to photons C1 and C2 on a receiving end chip, and two optimal symmetric cloning states are obtained by taking the photons C1 and C2 on the offset receiving end chip.

The invention provides orthogonal-tetragonal multilayer heterostructure antiferroelectric ceramic and a preparation method thereof. Tetragonal phase antiferroelectric presintering powder is prepared, orthogonal phase antiferroelectric presintering powder is prepared, the tetragonal phase antiferroelectric presintering powder and the orthogonal phase antiferroelectric presintering powder are respectively subjected to secondary ball milling, drying and sieving and then subjected to tape casting treatment, and the antiferroelectric ceramic with the orthogonal-tetragonal multilayer heterostructure is obtained. A single-layer film A and a single-layer film B are obtained; and carrying out heterogeneous lamination temperature isostatic pressing treatment on the single-layer film A and the single-layer film B according to modes of AAAA, ABBA, BAAB, ABAB and BBBB to obtain the multi-layer heterostructure anti-ferroelectric ceramic, carrying out glue removal on the multi-layer heterostructure anti-ferroelectric ceramic, and calcining to obtain the orthogonal-tetragonal multi-layer heterostructure anti-ferroelectric ceramic. According to the multilayer heterostructure constructed by the invention, the breakdown field strength and the macroscopic polarization response of the material are synergistically improved through the interface blocking effect induced by the interlayer interface and the MWS interface polarization effect, so that the energy storage density is effectively improved.