81results about How to "Achieve coupling" patented technology

The invention relates to a closed-loop feedback transcranial alternating current stimulation system and method. The closed-loop feedback transcranial alternating current stimulation system comprises a phase stimulation system used for generating a plurality of electrical stimulation signals and stimulating different brain areas in the brain based on the electrical stimulation signals; a preset phase difference exists between the electrical stimulation signals; the electroencephalogram acquisition system is used for acquiring electroencephalogram signals of the brain after the phase stimulation system stimulates the brain for a preset time; and the evaluation feedback system is connected with the phase stimulation system and the electroencephalogram acquisition system and is used for evaluating the electroencephalogram signals acquired by the electroencephalogram acquisition system and adjusting the electrical stimulation signals based on an evaluation result. According to the closed-loop feedback transcranial alternating current stimulation system, the waveform signal can be flexibly adjusted based on the real-time oscillation signal of the brain, and the problems that in the prior art, the shock wave form is single, individual differences cannot be accurately matched, and dynamic brain network state changes cannot be adapted are solved.

The invention discloses a multifunctional wind wave and flow coupling experiment platform, and belongs to the technical field of bridge engineering. The experimental platform comprises a wind power system and a water power system, the wind power system is of a two-layer structure, the upper layer is an unsteady wind tunnel, and the lower layer is a steady wind tunnel; the hydrodynamic system is located below the steady wind tunnel; the steady wind tunnel is of a sealed annular structure, and a fan, a first experimental section and a second experimental section are arranged in the steady wind tunnel; the unsteady wind tunnel is arranged above the second experiment section, and interaction windows A which are communicated with each other are formed between the unsteady wind tunnel and the steady wind tunnel; the hydrodynamic system is located below the second experiment section, and an interaction window B which is communicated with the steady wind tunnel is formed between the hydrodynamic system and the steady wind tunnel; the unsteady wind tunnel, the steady wind tunnel and the hydrodynamic system are communicated with one another through the two interactive windows. The experimental platform can simulate different coupling action environments of wind, waves and flows, and is used for testing the stability, reliability and durability of various ocean engineering structures and equipment.

The invention discloses a wastewater treatment and recovery process in the production process of a layered oxide positive electrode material of a sodium-ion battery, and belongs to the field of environmental protection, the wastewater treatment and recovery process comprises the following steps: S1, respectively carrying out pH regulation on mother liquor and washing water, and respectively carrying out MF microporous filtration on the mother liquor and the washing water after pH regulation; s2, the filtered mother liquor and washing water are subjected to pH adjustment respectively, and the mother liquor and washing water subjected to pH adjustment are subjected to UF ultrafiltration respectively; s3, carrying out first-stage RO membrane treatment on the washing water UF produced water subjected to UF ultrafiltration; carrying out second-stage RO membrane treatment on mother liquor UF produced water and first-stage RO concentrated water after UF ultrafiltration; s4, carrying out resin defluorination on the concentrated water treated by the second-stage RO membrane; the produced water after the second-stage RO membrane treatment is returned to the first-stage RO membrane treatment in the step S3; and S5, treating the wastewater subjected to resin defluorination through a bipolar membrane, and recovering to obtain sodium hydroxide and sulfuric acid, so that the problem that sodium ions and sulfate ions cannot be recovered in the prior art is solved.

The invention provides a prediction method and system for a temperature field in a high-ground-temperature tunnel, and belongs to the technical field of tunnel construction.The prediction method comprises the steps that S1, an initial value of the high-ground-temperature tunnel is obtained; s2, building a surrounding rock tunnel model; s3, the surrounding rock tunnel model is set to be in a non-uniform temperature field, and the initial value of the high-ground-temperature tunnel is substituted into the surrounding rock tunnel model to initialize the model; s4, the air flow temperature is set in the initialization model; setting underground seepage water in the initialized model by adopting a Darcy law so as to form a coupling tunnel model after coupling of the surrounding rock, the underground seepage water and the wind current; and S5, predicting a temperature field in the high-ground-temperature tunnel by using the coupling tunnel model. According to the invention, the coupling of surrounding rock, underground seepage water and wind flow is realized, the temperature field distribution in the high-ground-temperature tunnel is simulated, and the potential risk existing in the high-ground-temperature tunnel construction can be predicted according to the simulated temperature field.

The invention belongs to the technical field of complex network analysis, and particularly relates to a community discovery method and device based on a binary symbol network and computing equipment. The method specifically comprises the following steps: step S101, establishing node and edge connection relation data of a bipartite symbol network according to evaluation relation data of a user and a commodity; s102, for two nodes with common secondary nodes in the main node set, according to the edge connection relation of the network and the weight of the secondary nodes, the edge connection weight value of the two nodes is calculated, and a main node set network adjacency matrix W is constructed; step S103, according to the adjacency matrix W of the main set node network, calculating to obtain an embedding matrix Y of the nodes and a community membership matrix C; and S104, adjusting the network adjacency matrix W according to the calculated node community membership matrix C, then re-optimizing the node embedding matrix Y and the node community membership matrix C to form iterative optimization, and finally obtaining a node embedding and community division result.

A flying / climbing amphibious variant robot based on bionic adhesion comprises a robot body, the four corners of the robot body are connected with robot arms, the lower portions of the robot arms are connected with mechanical legs through connecting pieces, the mechanical legs are connected with an air pump through hoses, and the air pump is installed on the robot body; the fuselage is connected with a flight control unit, an air pump / steering engine control unit and a lithium battery which are matched with the arms and the mechanical legs to realize flight and climbing functions; in the flying state, the machine arms are wings of the robot, and in the climbing state, the machine arms are swing arms of the robot; the quadrotor unmanned aerial vehicle and the quadruped robot are organically combined, meanwhile, the climbing function is achieved through bionic adhesion, and the robot adapts to various complex terrains, can flexibly fly and vertically take off and land, can be switched between the flying mode and the climbing mode, can be close to a target for reconnaissance, is long in endurance, and has the advantages of being good in obstacle crossing performance and capable of being rapidly transferred.

The invention discloses a wind tunnel test device for separation and coupling of vertical bending and torsion modes of a bridge, and belongs to the technical field of bridge wind tunnel tests, the wind tunnel test device comprises support frames mounted on two sides of a bridge segment model, guide rods are arranged on the support frames, and a support seat is slidably mounted on the guide rods; a connecting rod fixedly connected with a bridge segment model is rotatably installed on the supporting base, two supporting cross rods are arranged on the supporting frame, a suspension arm located between the two supporting cross rods is fixedly connected to the connecting rod, an elastic assembly is installed between the suspension arm and the supporting cross rods, and a limiting block fixedly connected with the connecting rod is rotatably installed on the supporting base. Two limiting plates are installed on the guide rod in a sliding mode, sliding blocks are installed on the limiting plates in a sliding mode, the two sliding blocks are connected to opposite threads of the two-way screw in a threaded mode, grooves are formed in the limiting blocks, and a driving part capable of sliding along the grooves is fixedly installed on the two-way screw. The vertical bending mode and the torsion mode can be locked or unlocked by rotating or sliding the driving part.

The present invention discloses a polarization-resolved fluorescence test system based on a three-dimensional movable optical path, including a laser generating component for generating excitation light; a laser polarization adjusting component for adjusting the polarization state of the excitation light; a filter for reflecting the excitation light and transmitting the fluorescence emitted by the sample; a three-dimensional independent optical path displacement component for three-dimensionally adjusting the optical path to focus the light spot on the sample surface for independent movement in the x, y, and z axes; a microscope system for illuminating and microscopically imaging the sample surface morphology, excitation light, and fluorescence; a fluorescence polarization adjusting component for adjusting the polarization state of fluorescence; and a spectrum detection module for detecting the spectrum and lifespan of the fluorescence. The present invention has the characteristics that the sample does not move but the optical path moves, and is compatible with most non-displaceable cryostats on the market. At the same time, polarization-adjustable components and small-angle incidence are used to realize arbitrary circularly polarized or linearly polarized fluorescence detection.

The invention belongs to the technical field of sewage treatment, and discloses a DO-ORP coordinated regulation artificial tidal food web sludge in-situ reduction and phosphorus recovery method. Aiming at the problems of high energy consumption, serious phosphorus resource loss and the like of traditional sludge treatment, a multi-stage food chain consisting of microorganisms, protozoa and metazoan is implanted by constructing an artificial tidal environment with periodic alternation of wetting and drying; according to the method, the metabolic activity of sludge hydrolysis flora and phosphorus-accumulating bacteria is activated by utilizing cooperative regulation and control of DO concentration and ORP, microbial extracellular polymeric substances are triggered to be depolymerized by adopting tidal periodic oscillation, in-situ reduction of sludge biomass is realized by combining a food web cascade predation effect, and phosphorus is synchronously removed by virtue of an anaerobic phosphorus release-aerobic phosphorus uptake coupled struvite crystallization process. The method is suitable for treating the excess sludge of a municipal sewage treatment plant, and the high-purity magnesium ammonium phosphate fertilizer is produced while the dehydration energy consumption is reduced by 40%.

The application provides a node device anti-theft device for hard ground coupling, which comprises a connecting main plate, a first side of the connecting main plate is used for being fixed to a hard ground, and a coupling interface is arranged on a second side of the connecting main plate, which is opposite to the first side; a node device is fixed on the connecting main plate through the coupling interface; wherein the first side of the connecting main plate is matched with the ground shape of the hard ground to realize the fixing and coupling between the node device and the hard ground. Through the device, the eSeis node device can be stably and effectively coupled with the hard ground in a complex environment, and the loss of the device can be effectively prevented.

The application discloses a kind of microscale microplastic migration occurrence multi-physical field coupling simulation method, belong to ecological environment field.The method aims at solving the problem that existing microplastic migration model ignores interface adsorption process, is difficult to couple the action of multiple physical fields and is not suitable for the problem of insufficient adaptability to heterogeneous environment.Its main points are: in the Lagrangian framework, by constructing seepage field, and comprehensively calculating the stokes drag, dielectrophoresis force and Brownian force suffered by microplastic particles to track its movement, while explicitly introducing the adsorption and desorption between particles and pore wall, to simulate the migration trajectory and occurrence state of microplastic in heterogeneous porous medium.The application provides a high-precision simulation tool for revealing the environmental fate and health risk of microplastics in groundwater systems.

The application provides a fermentation mechanism with multi-layer tray fixation, relates to the fermentation technical field, and comprises a hydraulic damping and oil path locking system formed by the cooperation of a groove, a piston block and a push spring; and a linkage mechanism which converts linear motion of a tray into a hydraulic drive signal by the cooperation of a fixing frame, the tray, a moving wheel, a fixing wheel, a belt, a rotating shaft, an intermediate sleeve, an extension rod, an extension sleeve, a double pulley and a tension spring. The mechanism automatically limits the speed by the flow damping of hydraulic oil when the tray is pulled out, and the oil path is locked by the cooperation of the elastic sheet and the groove and the blocking of the intermediate groove by the sealing sleeve when fixation is needed, so that the dough displacement or falling caused by too fast pulling out of the tray is effectively avoided, and the stability and safety of the fermentation operation are significantly improved.

The invention discloses a radio frequency resonator of a high-energy ion implanter. The radio frequency resonator comprises a shell, an inductance coil, a coupling ring and a coaxial feed-through, the inductance coil is spirally arranged in the shell, the bottom of the inductance coil penetrates through the bottom of the shell and then extends into the vacuum acceleration cavity in a sealed mode, and the top of the inductance coil penetrates through the top of the shell. The coaxial feed-through comprises an inner conductor and an outer conductor, one end of the coupling ring is connected with the end of the inner conductor, and the other end is connected with the end of the outer conductor; after the coaxial feed-through is installed on the top of the shell in a penetrating mode, the inner conductor, the outer conductor and the coupling ring are all located in the shell, and a gap exists between the coupling ring and the inductance coil. The coaxial feed-through is rotated to drive the coupling ring to rotate, so that the coupling degree between the radio frequency resonator and the external circuit is adjusted, and the coupling ring and the inductance coil do not interfere with each other in the adjusting process. The coupling degree adjusting device has the characteristics of compact structure, high stability, high adjusting flexibility and the like, and overcomes the defects of complex coupling degree adjusting operation and long time consumption in the prior art.

The present invention relates to the technical field of communication equipment components, specifically to a capacitive coupling structure and a filter, a capacitive coupling structure, comprising an intermediate portion connected to a plurality of adjacent and unconnected resonators, the intermediate portion comprising a connection block for connecting the resonators, and an isolation cavity for isolating the resonators, the electric field directions of the two resonators connected to the same intermediate portion being different. A filter, comprising a plurality of resonators, at least one of the above-mentioned capacitive coupling structures being used between the plurality of resonators, the capacitive coupling structure causing capacitive negative coupling to be generated between the resonators connected thereto. The capacitive coupling structure and filter using the present solution can solve the technical problem in the prior art of using a deep-loaded frequency debugging blind hole to achieve capacitive negative coupling leading to the generation of resonance poles, achieve capacitive negative coupling through a capacitive coupling structure, eliminate low-frequency resonance poles, and avoid excessive out-of-band suppression amplitude.

The invention belongs to the technical field of separation, and particularly relates to a separation process of ethyl acetate and butanone, which comprises the following steps: a butanone-ethyl acetate-ethanol mixture to be treated enters the middle part of a butanone separation tower, liquid produced from the top of the butanone separation tower is continuously introduced into an ethanol separation tower, and a butanone product is continuously produced from the bottom of the butanone separation tower; continuously introducing tower top produced liquid of the ethanol separation tower into an ethyl acetate separation tower, and continuously producing an ethanol product from the tower bottom of the ethanol separation tower; liquid produced from the top of the ethyl acetate separation tower returns to the butanone separation tower, and ethyl acetate products are continuously produced from the bottom of the ethyl acetate separation tower. According to the method, the ethanol is introduced as an entrainer, the azeotropic ratio of the ethanol to the ethyl acetate and the butanone is obviously changed by changing the operation pressure, and the operation is performed in different rectification areas generated under different pressure conditions, so that the operation difficulty of direct pressure swing rectification separation of the ethyl acetate and the butanone is reduced, and the separation of the ethyl acetate and the butanone is realized.

The present invention relates to a high temperature wear resistant dry brake friction plate material and a preparation method thereof, belonging to the technical field of alloy friction materials. The material strengthens the iron-copper alloy matrix by precisely controlling the addition amount of Mo and Y2O3; adds a high entropy alloy strengthening phase (Al‑Cr‑Fe‑Ni‑Ti) to the iron-copper alloy to improve the wear resistance; adopts a composite lubricating phase (CaF2+BaF2+Ag), and adjusts its ratio so that CaF2‑BaF2 weakens the two-body wear effect and Ag weakens the three-body wear effect, thereby achieving the improvement of lubrication performance under high temperature and room temperature conditions; adds a high entropy alloy strengthening phase (Al‑Cr‑Fe‑Ni‑Ti) and a composite lubricating phase (CaF2+BaF2+Ag) at the same time, and adjusts its ratio so that (CaF2+BaF2+Ag) weakens the adhesive wear effect and (CaF2+BaF2+Ag) weakens the abrasive wear effect, thereby reducing the friction coefficient and wear rate.

The invention discloses a wireless power supply system and method for an unmanned aerial vehicle, and belongs to the technical field of wireless charging, and the system comprises an unmanned aerial vehicle body, a power receiving mechanism connected with the unmanned aerial vehicle body, a power transmission mechanism wirelessly connected with the power receiving mechanism, and a power control mechanism connected with the power transmission mechanism. The power control mechanism is used for performing calculation according to voltage and current values of a battery load of the unmanned aerial vehicle so as to control output of electric power, and the electric power receiving mechanism and the electric power transmission mechanism jointly form a coupling device. The wireless power supply system and method for the unmanned aerial vehicle can adapt to the structure of the unmanned aerial vehicle, a complex device does not need to be arranged on the unmanned aerial vehicle body, the coupling capacity is improved, closed-loop control over the charging process can be achieved, and the practicability of the device is improved.

The invention discloses a multi-physics field coupling numerical simulation method for the selective laser melting forming process of an aluminum matrix composite. The method specifically comprises the steps that 1, a heat-force complete coupling control equation set is established; 2, carrying out homogenization thermal-mechanical property characterization on the AlSi10Mg / Al2O3 / SiC composite powder, namely establishing a quantitative relation between the equivalent thermal-mechanical property of the composite powder and particle characteristic parameters by adopting an Eshelby equivalent inclusion theory and a Mori-Tanaka homogenization method; 3, providing a dynamic laser heat source model, and simulating energy absorption, reflection and scattering behaviors caused by light-powder interaction; and 4, coupling the cellular automaton CA and the phase field method PF, and constructing a multi-scale dynamic model formed by solidification structure evolution and residual stress. According to the method, the limitation of an existing simplified model is overcome, and the high-fidelity numerical model comprehensively reflecting the multi-field coupling rule in the SLM forming process is established.

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

The embodiment of the invention provides a photoconductive switch link assembly, which comprises a photoconductive switch, a high-voltage conductor, a connector, a grounding conductor, a capacitor and a radio frequency connector, and is characterized in that the photoconductive switch, the high-voltage conductor, the connector, the grounding conductor, the capacitor and the radio frequency connector are coaxially connected; the high-voltage conductor, the grounding conductor, the capacitor and the radio frequency connector are stacked, the capacitor is located between the high-voltage conductor and the grounding conductor, and the grounding conductor is located between the capacitor and the radio frequency connector; an accommodating space is arranged in the capacitor, and the photoconductive switch is accommodated in the accommodating space; the input end of the photoconductive switch is connected with the high-voltage conductor, and the output end of the photoconductive switch is connected with the connector and is connected with the radio frequency connector through the connector; a containing cavity is formed in the side, facing the capacitor, of the grounding conductor, and the connecting body is located in the containing cavity. The whole structure of the link is high in integration level, compact in structure, small in external electromagnetic interference in the transmission process of current / voltage, and high in fidelity.

The utility model belongs to the technical field of separation, and particularly relates to an ethyl acetate and butanone separation device, which comprises a butanone separation tower, an ethanol separation tower and an ethyl acetate separation tower which are connected in sequence, in the utility model, the tower top produced liquid of the ethyl acetate separation tower returns to the butanone separation tower, so that the purity of the product can be further improved; the gas phase of the butanone separating tower is used as a heat source of a reboiler at the bottom of the ethyl acetate separating tower, the gas phase at the top of the ethyl acetate separating tower is used as a heat source of a reboiler at the bottom of the ethanol separating tower, heat coupling can be realized between the rectifying towers with different operating pressures, the energy consumption in the rectifying and separating process is further reduced, and the method has higher operability.

The present invention discloses a method for numerically solving multiphase flow with coupled phase-change component transport, which belongs to the field of multi-component multiphase flow. The phase change model is used to calculate the component states between multiple phases, the mass transfer rate between phases, the phase volume fraction, etc., which are coupled to the component transport equation to further solve the net mass transfer rate, the Schmidt number, and the multi-component diffusion effect; based on the estimation-correction iteration of pressure-velocity correction, a two-way coupled and highly coordinated solution algorithm is constructed. The present invention can handle the problems of temperature-density-mass transfer rate-pressure-velocity being difficult to couple and converge, as well as the inaccurate interface capture, and realize the calculation of non-steady, viscous, incompressible, and multi-dimensional heterogeneous and homogeneous multiphase flows. It has important engineering value and scientific significance for the research on the fields of high efficiency, integration, and safety of energy systems. The present invention can simulate complex scenarios, has high flexibility, scalability, and easy convergence, and realizes more accurate simulation.

The invention discloses a semiconductor laser-based heterogeneous integrated coupling structure and a preparation method thereof, and belongs to the technical field of optoelectronic integrated devices. The heterogeneous integrated coupling structure comprises a chip and a laser; the chip is provided with a bonding groove, a silicon nitride conical waveguide and a silicon nitride single-mode waveguide, and the wide end of the silicon nitride conical waveguide is connected with the silicon nitride single-mode straight waveguide; the laser includes a contact layer, a ridge waveguide, a first tapered waveguide, and a second tapered waveguide. According to the invention, a double-layer tapered waveguide structure composed of a first tapered waveguide and a second tapered waveguide is designed, a silicon nitride tapered waveguide and a silicon nitride single-mode waveguide are arranged on a chip, and the second tapered waveguide and the silicon nitride tapered waveguide are optically interconnected in a vertical coupling manner; the problem of mode adaptation of an existing laser and a silicon nitride chip can be effectively solved, efficient on-chip coupling of heterogeneous integration of the laser is achieved, and the coupling efficiency of the heterogeneous integration coupling structure is improved.

This invention relates to the field of tunnel and underground engineering safety monitoring technology, and discloses a method and system for graded early warning of water-soil coupled disasters in soft strata tunnels based on mechanism inversion. The method includes: using multi-scale coupling technology to parametrically couple a pre-constructed macroscopic continuous medium model and a microscopic constitutive model, and generating a mechanism inversion model based on the parameter coupling results to simulate the water-soil coupled disaster response of the tunnel surrounding rock; inputting pre-processed historical monitoring data into the mechanism inversion model, iteratively adjusting the parameters of the mechanism inversion model through inverse analysis to generate a combination of inversion parameters; and inputting pre-processed real-time monitoring data into the corrected mechanism inversion model. This invention, through local mesh refinement and erosion interface mapping based on level set functions, accurately embeds a microscopic constitutive model capable of describing soil particle migration and pore evolution into high-risk areas of the surrounding rock, achieving coupling of macroscopic and microscopic physical processes at key locations.

The application discloses a kind of implementation dissolution-precipitation dynamic coupling's saline aquifer CO2 mineralization storage pore scale numerical simulation method, comprising: constructing geometric model under pore scale;The flow velocity distribution and pressure distribution of geometric model in time and space are calculated;Reaction migration model of the CO2 mineralization storage of saline aquifer is constructed;Kinetics reaction rate equation and porosity dynamic evolution equation are established, ion product-solubility product judgment statement is introduced, the reaction migration model is solved, and CO2 deep saline aquifer mineralization storage reaction migration numerical simulation is completed.The application is coupled by DBS equation and ADE equation, realizes the solution reaction migration numerical simulation under pore scale, simplifies the complex reaction migration numerical simulation solving process;In the process of solving reaction migration, dissolution and precipitation process are coupled simultaneously, more close to real situation;It is suitable for operation under a variety of working conditions, extracts solute transport and dissolution-precipitation rule under different conditions, and provides support for experimental research.

The present invention relates to the technical field of energy conservation and emission reduction, and in particular to a waste heat refrigeration method adapted to the dynamic synthesis of green ammonia, comprising: S1, exchanging heat between raw compressed gas and synthesis gas after ammonia synthesis reaction in a multi-stage cooler system to achieve preheating; S2, subjecting the preheated raw compressed gas to an ammonia synthesis reaction in a synthetic ammonia reaction system to obtain synthesis gas; the synthesis gas is subjected to a waste heat boiler to recover reaction heat and produce low-pressure steam as a by-product; S3, cooling the synthesis gas treated in step S2 in turn through a multi-stage cooler system and a cooling condenser system to liquefy ammonia, and separating liquid ammonia in a product recovery system; the waste heat refrigeration unit utilizes the low-pressure steam to dynamically match the cooling capacity required by the cooling condenser system. The present invention can utilize low-pressure steam waste heat refrigeration technology to complete direct conversion between cold and hot ends, realize coupling between fluctuating steam production and fluctuating cooling demand, and also conform to the concept and production principles of green hydrogen and green ammonia.

This invention relates to the field of medium- and low-voltage distribution network technology, and discloses a spatiotemporal multidimensional coordinated control method for source-load-storage in medium- and low-voltage distribution networks that considers flexibility margin. The method includes: defining flexibility margin and establishing a spatiotemporal distribution matrix of flexibility margin; establishing a step-by-step reservation and transmission mechanism for flexibility margin and a cross-regional real-time mutual assistance mechanism for flexibility margin; and imposing time and spatial constraints on the spatiotemporal distribution matrix of flexibility margin; and introducing the alternating direction multiplier method to solve for the optimal coordinated scheduling scheme. By uniformly quantifying flexibility resources through the spatiotemporal distribution matrix of flexibility margin and imposing time and spatial constraints on them respectively, and then introducing the alternating direction multiplier method for joint spatiotemporal solution, the optimal coordinated scheduling scheme can be ensured to be optimal in both time and spatial dimensions, filling the theoretical gap in spatiotemporal coordinated control of distribution networks.

The application discloses an electric heat pump mixed water heater and an evaporator, and relates to the technical field of water heaters. The electric heat pump mixed water heater comprises a shell, an electric heating system, a heat pump system and a fan. The shell is provided with a first air inlet, a second air inlet and an air duct. The first air inlet is arranged to face a first direction, and the second air inlet is arranged to face a second direction. One of the first air inlet and the second air inlet is an air inlet, and the other is an air outlet. A water tank liner is arranged in the shell. The electric heating system is arranged in the shell and comprises an electric heating element. The electric heating element is arranged in the water tank liner. The heat pump system is arranged in the shell and comprises a condenser and an evaporator. The condenser is arranged in heat exchange with the water tank liner. The evaporator is arranged in the air duct and close to the first air inlet. The evaporator is arc-shaped and is arranged to bend towards the second air inlet for cooling the air entering the shell from the air inlet. The fan is arranged in the air duct. The application can reduce the space occupied by the evaporator and realize more efficient heat exchange.

The gear ring comprises a body, the body is provided with an inner ring and an outer ring, the inner ring is provided with first combination teeth, and the outer ring is provided with second combination teeth; the body comprises a combination part which is suitable for being combined with an external mechanism; the combination part is arranged on the inner ring, and the first combination teeth are sequentially arranged in the axial direction; or the combination part is arranged on the axial end face of the body. According to the gear ring, the combination part is arranged on the inner ring of the gear ring or the axial end face of the gear ring, and external mechanisms such as a clutch, a synchronizer and a brake can be combined with the combination part, so that locking of the gear ring or coupling of the gear ring and other components is achieved.

According to the loading device for simulating multi-mode fretting wear, better mechanical transmission is achieved through the tangential loading unit, the first normal loading unit and the second normal loading unit, and the fretting transmission effect during fretting can be guaranteed. And the loading unit is limited through the limiting clamping groove unit, so that the stability of the first normal transmission part, the second normal transmission part and the tangential transmission part is ensured when the fretting wear loading device is driven, and the fretting wear loading device is prevented from deviating. And the tangential loading unit and the first normal loading unit can realize single operation through an external driving system and can also realize coupling through common operation.