251results about How to "Taking into account stability" patented technology

The EV charging and discharging optimization method considering user will and battery loss comprises the steps that a V2G model is constructed according to driving characteristics and user habits of an EV owner, subjective factors and objective factors influencing decision making of an electric vehicle user are analyzed, and modeling is carried out; the method comprises the following steps: adding discharge income and battery loss cost into comprehensive charging cost, and firstly, carrying out modeling quantification on the battery loss cost based on temperature and discharge depth; secondly, analyzing a three-dimensional relationship among the temperature, the discharge depth and the battery life, and finally, considering seasonal characteristics of temperature loss; and adding dynamic adjustment of user willingness and loss seasonal characteristics in an optimization strategy, constructing a typical scene, and optimizing the comprehensive charging cost of the user side and the peak-valley difference of the power grid side by using a dung beetle algorithm. According to the optimization method, charging and discharging behaviors are optimized by introducing user willingness, and the user satisfaction is improved; battery loss is considered, battery life is prolonged, and maintenance cost is reduced; in combination with seasonal characteristics, the overall efficiency of the system is improved, and stable operation is ensured.

The invention discloses a high-temperature-resistant fine-grain high-conductivity copper material, which belongs to the technical field of high-performance copper materials for electronic communication and comprises the following raw materials in percentage by mass: 8 to 50 ppm of iron, 15 to 20 ppm of sulfur, 10 to 15 ppm of manganese, 20 to 25 ppm of titanium, 10 to 20 ppm of aluminum, 5 to 10 ppm of chromium and the balance of copper and inevitable impurities. The invention further discloses a preparation method of the high-temperature-resistant fine-grain high-conductivity copper material. Nitrogen is introduced in the smelting process, a proper hot rolling structure is obtained by controlling the hot rolling deformation amount and the finish rolling temperature, grains with the small size can be obtained at the high temperature by combining the copper material prepared through the set cold rolling and annealing technology, and the conductivity and the high-temperature structure stability are well considered. According to the high-temperature-resistant fine-grain high-conductivity copper material, the conductivity is 100% IACS or above, and the average grain size is smaller than 150 micrometers after heat preservation treatment is conducted for 10 min at the temperature of 1065 DEG C.

The invention provides an active inertia supporting method, device and equipment for an energy-storage-free photovoltaic grid-connected system, and relates to the technical field of new energy grid-connected power generation and intelligent control. The method comprises the following steps: constructing a direct current-alternating current double-side dynamic model of the energy-storage-free photovoltaic grid-connected system; constructing a total objective function according to the direct current-alternating current double-side dynamic model; the total objective function comprises a plurality of objective functions and penalty functions; taking the power reservation coefficient and the virtual rotational inertia as individuals, and taking a plurality of target functions as a multi-target task cooperation whale optimization algorithm to obtain a Pareto front; respectively inputting individuals in the Pareto frontier into the total objective function to determine an optimal individual; and dynamically introducing the optimal individual into a control module of the grid-forming type virtual synchronous generator through a smooth transition function, so that the energy-storage-free photovoltaic grid-connected system operates in an optimal state. According to the invention, voltage and frequency fluctuation can be effectively suppressed, system stability and photovoltaic utilization rate are both considered, and operation cost is reduced.

The invention discloses a high-conductivity fine-grain copper material, which belongs to the technical field of high-performance copper materials for electronic communication and comprises the following raw materials in percentage by mass: 3 to 10 ppm of silver, 2 to 5 ppm of iron, 1 to 10 ppm of magnesium, 3 to 10 ppm of nickel, 10 to 15 ppm of titanium, 5 to 15 ppm of aluminum and the balance of Cu and inevitable impurities. The invention further discloses a preparation method of the high-conductivity fine-grain copper material and a ceramic copper-clad plate. By adding trace alloy elements, a compound phase capable of effectively inhibiting grain growth is obtained, a hot rolling process is controlled, a proper hot rolling structure is obtained, and the copper material prepared by combining an optimized cold rolling and annealing process can obtain fine and uniform grains at high temperature; and meanwhile, a trace amount of alloy elements are added, so that the influence on the conductivity of the copper can be avoided, the conductivity and high-temperature structure stability of the copper can be considered, and the high-conductivity fine-grain copper material is obtained. According to the high-conductivity fine-grain copper material, the conductivity is 100% IACS or above, and the average grain size is smaller than 150 micrometers after heat preservation is conducted for 10 min at the temperature of 1050 DEG C.

The invention belongs to the field of power electronic control, and relates to a parallel pulse power decoupling system control device and method, and the device comprises a second-order low-pass filter, a sampling module, an outer-loop nonlinear ADRC controller, an inner-loop nonlinear ADRC controller, a current feedforward module, a comparator, and a dual-inductor bidirectional Buck / Boost converter. All the devices are connected in sequence to form the parallel pulse power decoupling system control device; according to the invention, the dual-inductor bidirectional Buck / Boost converter is adopted as a pulse power compensation unit and is connected in parallel with the output port of the pre-stage power supply system, so that the transient process of inductor current commutation can be eliminated, and the bus current peak generated during pulse load state switching can be effectively reduced.

The invention belongs to the technical field of plant planting, and discloses a plant root zone water-retaining agent targeted application method and system based on an intelligent model, and the method comprises the steps: obtaining plant parameter data, planting pit structure data and soil texture data; determining a root zone radius and a root zone effective depth, calculating a root zone cross section area and a root zone volume, and obtaining the number of layers and the volume of each layer; obtaining a water supply event record and a water content time sequence, obtaining a root zone equivalent infiltration volume, and obtaining a root zone effective water retention volume; calculating the notch volume of the effective moisture supply of the root zone by combining the effective moisture retention volume of the root zone, and endowing the notch with a grade mark; pre-constructing a water-retaining agent application prediction model, and outputting a water-retaining agent target dosage and layered putting proportion set; correcting an output result of the water-retaining agent application prediction model; modeling analysis is carried out on the moisture retention and notch of the root zone through the model, the water-retaining agent dosage and the layering proportion are output, and the pertinence and stability of water-retaining agent application are improved.

The invention discloses drilling equipment for underwater rock and soil and an underwater rock and soil exploration method.The drilling equipment comprises a connecting plate, a mounting frame is arranged at the top end of the connecting plate, a lifting mechanism is arranged in the mounting frame, a speed reducer is arranged at one end of the lifting mechanism, a supporting frame is arranged at the top end of the speed reducer, and a second motor is arranged at the top end of the supporting frame; a limiting cleaning mechanism is arranged at the top end of the connecting plate, and a drilling hole is formed in the top end of the connecting plate; the limiting cleaning mechanism comprises a sliding shaft, a spiral disc, a spiral strip, a sliding strip, a spiral block, a limiting cleaning block, a third motor and a bevel gear, the sliding shaft is arranged at the top end of the connecting plate, and the spiral disc is arranged on the inner wall of the sliding shaft. The sampling rod is automatically limited and fixed in the sampling process through the limiting and cleaning mechanism, shaking or deviation of the sampling rod in the drilling process is prevented, the sampling accuracy is improved, meanwhile, residual moisture on the sampling rod can be removed after sampling, the influence of the moisture on a sample is reduced, and the sample quality is improved.

The utility model discloses a gear-adjustable electric bean grinder which comprises a main machine shell, a fixed motor fixedly arranged on the main machine shell, a driving rod axially connected with an output shaft of the motor in a sliding mode, a first grinding disc connected with the driving rod and a second grinding disc arranged in the main machine shell and matched with the first grinding disc for grinding. The upper end of the main machine shell is rotationally connected with an adjusting knob, a bean inlet channel allowing beans to pass through is formed between the inner wall of the main machine shell and the motor, an opening is formed in the main machine shell and communicated with the bean inlet channel, a lifting rod is arranged in the main machine shell, and one end of the lifting rod is matched with the adjusting knob through a linkage assembly. One end of the lifting rod is connected with the main machine shell, the other end of the lifting rod is connected with the driving rod, the adjusting knob drives the lifting rod to move up and down relative to the main machine shell through the linkage assembly, when the lifting rod moves up and down, the gap between the first grinding disc and the second grinding disc changes, and the electric bean grinder is simple in structure, good in use stability and high in adjusting precision.

The invention discloses an optical cable vibration source external force damage signal identification method based on distributed optical fiber sensing, relates to the technical field of signal detection, and solves the problem of identification of the optical cable vibration source external force damage signal in the existing urban complex and changeable environment The method comprises the following steps: detecting an optical cable external force damage vibration signal by using a phi-OTDR technology, and constructing a vibration signal data set; preprocessing the vibration signals, then performing multi-feature set extraction on the preprocessed vibration signals, and dividing the preprocessed vibration signals into a training set and a test set; constructing a CatBoost recognition model, and training the recognition model by adopting a training set to obtain a trained CatBoost recognition model; adjusting and optimizing parameters in the trained CatBoost recognition model by adopting an improved whale optimization algorithm so as to obtain an optimized recognition model; and inputting the test set into the optimized recognition model, and performing performance evaluation to realize recognition of the vibration signal. Therefore, various optimization problems can be processed more effectively.

The application discloses a laser engraving processing device and method based on a five-axis engraving machine, relates to the field of laser engraving equipment control, and loads a three-dimensional CAD model and a process task of a workpiece to be processed, distributes the process task to machining paths of each laser processing assembly, respectively predicts time-space collision of paths of five laser processing assemblies, adjusts speed or paths of low-priority laser processing assemblies through a priority avoidance algorithm when collision risk is predicted, and generates a collision-free pre-planned path. Through reasonable path planning and a collision avoidance mechanism, the application effectively avoids collision risk between multiple laser processing assemblies and guarantees stability of a machining process. Through establishment of a thermal influence monitoring grid and a thermal dose accumulation model, laser machining parameters are adjusted in real time, workpiece deformation caused by thermal dose superposition is avoided, and machining quality is improved. A focal point dynamic following mechanism ensures that the focal point is always in an optimal machining position, and further improves engraving precision.

The utility model belongs to the technical field of photographic equipment, and discloses a time-delay photographic device with a multi-angle rotating support structure, which comprises a base, a horizontal rotating component is mounted at the top of the base and connected with a support, an angle adjusting component is mounted on the support, and the angle adjusting component is connected with the horizontal rotating component. The angle adjusting assembly is connected with a clamping assembly, the horizontal rotating assembly comprises a fixing seat, a first-stage bevel gear is installed in the fixing seat, the first-stage bevel gear is fixedly connected with a vertically-arranged transmission rod, the bottom end of the transmission rod is connected with the base through a bearing, and the top end of the transmission rod penetrates through the fixing seat to be fixedly connected with a support. The first-stage bevel gear is in meshed connection with a second-stage bevel gear, the second-stage bevel gear is connected with a driving motor through a motor shaft, the shooting angle is adjusted in an electric control mode, the angle adjusting process is faster and more stable, manual slow adjustment is not needed, shooting continuity can be guaranteed, and the shooting effect is improved.

The application discloses a kind of low-voltage electrical apparatus contact working condition intelligent adjustment systems, it is related to low-voltage electrical apparatus technical field. Including: data acquisition module, for collecting the basic working condition original data set and coupling working condition original data set of low-voltage electrical apparatus contact, and pre-processing, obtain corresponding standardization basic working condition data set and standardization coupling working condition data set;Data analysis module is used for the comprehensive analysis of multidimensional working condition correlation data in standardization coupling working condition data set, and obtains working condition compensation adjustment value.The final working condition adjustment value obtained by the application can offset the working condition fluctuation caused by temperature rise deformation, electric force interference and spring aging attenuation during contact operation, maintain the stable contact state of contact rated design, reduce the occurrence probability of abnormal temperature rise of contact resistance, prolong the service life of contact, and through hierarchical control logic, the stability of continuous operation of equipment and the reliability of fault protection are considered.

The invention relates to the technical field of facility agriculture and micro-grid cooperative control, and particularly discloses a greenhouse micro-grid dynamic scheduling and photosynthetic efficiency cooperative optimization control method and system. The method comprises the following steps: constructing an energy management scheduling model with maximization of accumulated net photosynthetic products of crops in a scheduling period and minimization of net energy cost of a micro-grid as a collaborative optimization target; collecting real-time environment parameter data in the greenhouse and operation data of a micro-grid wind and light storage system and a load; a multi-objective optimization algorithm is adopted to solve the model online, and a joint optimization strategy including a micro-grid dynamic scheduling instruction and a greenhouse environment coordination control instruction is output; and executing the joint optimization strategy, and dynamically regulating and controlling the power output distribution of the micro-grid, the energy storage charging and discharging state and the operation process of the environment regulation and control equipment. According to the method, the multi-target collaborative optimization model with'photosynthetic product accumulation maximization 'and'net energy cost minimization' as the core is constructed, so that comprehensive maximization of energy benefits and agricultural production benefits is realized.

This invention provides a clock discipline method and apparatus, relating to the field of time synchronization technology. The method first calculates the original time difference sequence, then filters it, then calculates the frequency increment based on the filtered time difference sequence, and finally performs calibration based on the frequency increment. This ensures that the frequency deviation information on which calibration depends is no longer affected by the random jitter of the BeiDou clock second pulse signal, thereby suppressing frequent oscillations in the calibration command. At the same time, because the time difference sequence on which calibration is based has become smooth and stable, the calibration process converges faster, avoiding phase disturbances introduced by repeated trial and error. Thus, without sacrificing the inherent short-term stability of the local crystal oscillator, it achieves continuous and stable correction of its long-term frequency drift, taking into account both the short-term stability and long-term frequency accuracy of the output clock.

The utility model requests protect a kind of swimming pool lifting type advertising screen, its technical scheme main point is including box, box is movably connected with back frame, the front surface of back frame is connected with display screen, and multiple section type support pipe is vertically set in box, back frame is connected on support pipe, installation slot is set in the edge of swimming pool, box is installed in installation slot, gear and rack that is mutually engaged are equipped between back frame and box, rack is set along the extension direction of support pipe, gear is fixedly connected in the output end of motor, the utility model realizes the lifting of advertising screen by the cooperation of gear and rack, maintains the stability of lifting by support pipe, setting in installation slot in the edge of swimming pool is convenient for swimmer to see when resting, and stability and aesthetic property are considered.

The utility model discloses an electric energy metering box quick release type cable fixing clamp plate, comprising a fixed bottom plate, the fixed bottom plate is slidably connected with a movable plate, the movable plate and a butt joint plate are in butt joint to form a mounting hole, the fixed bottom plate is provided with a butt joint unit, the movable plate is provided with a plectrum, the plectrum is provided with an embedding unit, and the embedding unit is provided with a clamping groove. The butt-joint unit and the embedding unit can be connected in a clamping mode, a push block is connected to the fixed bottom plate in a sliding mode, a bevel groove is formed in the shifting piece, when the push block slides, the push block can abut against and extrude the bevel groove to drive the shifting piece to be away from the butt-joint unit, and the butt-joint unit is separated from the embedding unit. According to the technical scheme of the utility model, on the basis of ensuring the stable connection, the connection state between the butt joint unit and the embedding unit can be changed through the push block, so that the disassembly and the assembly can be independently realized through different parts, and the connection stability and the disassembly convenience can be considered at the same time.

The utility model provides a kind of etching liquid's acid-base waste gas spray tower, including tower body, water outlet pipe being passed in tower body, the top of tower body is equipped with exhaust port, tower body is sequentially provided with the aeration device for being used to pass into waste gas and carry out aeration, the purification device for purifying waste gas and the spray device for spraying from below to top in it, the bottom of tower body is formed with water storage pool, and aeration device is located in water storage pool;Purification device includes the partition plate being arranged in tower body, the purification piece being arranged on partition plate, partition plate is equipped with mounting groove, the bottom of mounting groove is equipped with through hole, and through hole is through in partition plate and is communicated with mounting groove;Purification piece includes the mesh enclosure being arranged in mounting groove, the adsorption ball being arranged in mesh enclosure and the cover plate being arranged on mesh enclosure, and adsorption ball is filled in mesh enclosure, cover plate is arranged on the top of mesh enclosure, and micro gap is formed between cover plate and partition plate.The utility model has the advantages of low energy consumption and high purification performance.

A kind of flow video active interaction control method, equipment and medium for the scene of helping blind, construct the hierarchical task system for the scene of helping blind, train the semantic understanding and behavior alignment of multimodal large model to specific task of helping blind;Introduce the active interaction control mechanism for flow video, under the premise of not changing the bottom model parameter, realize the trigger output of environmental perception by the dynamic suffix switching of determination mode and generation mode;Finally, the incremental context updating strategy is used to optimize the inference process, while keeping the timing consistency and reducing the calculation redundancy.The invention solves the technical problems of lack of special data, passive interaction logic and calculation redundancy of multimodal large model in flow environment through the synergistic effect of data-driven task adaptation and active interaction mechanism.The general framework proposed in the invention provides an important theoretical basis and technical paradigm for the paradigm evolution of flow video understanding from "passive analysis" to "active interaction".

The application provides a surveying and mapping instrument positioning device for engineering surveying and mapping, and relates to the technical field of engineering surveying and mapping equipment, which comprises a support seat and further comprises an expansion adjusting assembly, wherein the expansion adjusting assembly comprises a first driving motor mounted at the bottom of the support seat, in the application, the gear engages to drive two centrally symmetrical racks to move reversely, the moving seat is synchronously moved with the racks through sliding cooperation with the linear guide rails, flexible adjustment of the distance between the support rods is realized, the rotating seat can rotate around the support frame, the angle is adjusted through the arc-shaped guide rails, and the positioning is completed by tightening the first knob bolt after the rotating seat is in place, in the multistage telescopic assembly, the support rods, telescopic rods and fine adjustment rods can slide along the length direction, are stretched to a suitable height as required, and are locked and fixed through corresponding knob bolts, the support rods on the support seat and the rotating seat are matched, telescopic adjustment and angle adjustment are combined, quick and flexible adjustment of the support span, the angle and the height is realized, and stable placement of the surveying and mapping instrument under various terrains is ensured.

The invention belongs to the technical field of compaction method foundation treatment, and particularly relates to a compaction method foundation treatment inter-pile soil sampling device which comprises a cylinder, a conical cylinder, a positioning cylinder, a sampling cylinder and a cutter, a plurality of guide holes are evenly distributed in the circumference of the cylinder, and the positioning cylinder is slidably arranged in the guide holes; a sampling barrel is arranged on the inner wall of the positioning barrel in a sliding manner; a plurality of guide blocks are evenly distributed on the circumference of the conical cylinder, sliding grooves are formed in the guide blocks, and the cutters are arranged in the sliding grooves in a sliding mode. The bottom sides of the cutters are in one-to-one correspondence with the sampling barrels; a plurality of positioning barrels extend out of the cylinder and abut against the inner wall of the exploratory well, a tip slope is arranged at one end of the sampling barrel, and after the sampling barrel is inserted into the inner wall of the exploratory well, the cutter is obliquely and downwards inserted into the soil body and coincides with the tip slope, so that a soil sample in the sampling barrel is cut off from the rear soil body. According to the device, the sampling device can be positioned and fixed, sampling and sample breaking can be rapidly carried out, samples can be conveniently taken out, and the sampling efficiency in an exploratory well is greatly improved.

This invention provides a hydrophobic solvent and coating, comprising the following components by weight: perfluoronaphthalene: 93-94.5 wt%; methyl undecanoate: 5-5.3 wt%; perfluoropolyether trimethoxysilane: 0.2-0.8 wt%. This invention constructs a low surface energy layer on the substrate surface using perfluoropolyether trimethoxysilane, weakening the adhesion between water and the coating. During windshield wipes, no white fog is visible, solving the problem of residual white fog after wiping with traditional coatings. Simultaneously, the film-forming substance forms chemical bonds with the hydroxyl groups of the substrate, resulting in high adhesion and coating hardness, stable basic hydrophobicity and mechanical properties, meeting the needs of conventional applications.

The utility model discloses a combined type anti-explosion electric immersed pump, which belongs to the technical field of electric immersed pumps and comprises a pump cavity, a liquid conveying pipe is connected onto the pump cavity, a plurality of pump bodies are arranged in the pump cavity, liquid pumping pipes are arranged on the pump bodies, and the liquid pumping pipes are communicated with the liquid conveying pipe, so that liquid pumped by the pump bodies converges and enters the liquid conveying pipe. And the liquid is conveyed to the next link through the liquid conveying pipe. The utility model effectively solves the problems of low speed and low efficiency of the traditional liquid transmission system, and not only improves the transmission speed and efficiency of the ultra-large flow flammable and explosive liquid, but also gives consideration to the stability and safety of the system through the parallel system of the combined explosion-proof submersible pump.

The invention belongs to the technical field of battery manufacturing, and relates to a lithium-supplementing current collector and a preparation method and application thereof.The lithium-supplementing current collector comprises a base film, a first metal layer and a second metal layer, the first metal layer and the second metal layer are arranged on the surface of at least one side of the base film in a stacked mode, and the first metal layer is located between the base film and the second metal layer; and the second metal layer is a lithium-containing alloy layer. The preparation method comprises the following steps: (1) arranging a first metal layer on the surface of at least one side of a base film; and (2) depositing a lithium-containing alloy layer on the surface of the first metal layer as a second metal layer to obtain the lithium-supplementing current collector. The lithium-containing alloy layer is prepared in the current collector, so that accurate lithium supplementation of the negative electrode is realized, safety, economy and stability are considered, and large-scale mass production is facilitated.

The application discloses a rice straw-based liquid mulch emulsion and a preparation method and application thereof. The preparation method comprises the following steps: adding pretreated rice straw into a sodium hydroxide solution for alkali treatment, so as to obtain rice straw fibers and a silicon-containing black liquor; washing and bleaching the rice straw fibers, so as to obtain bleached rice straw fibers; first standing the silicon-containing black liquor, then adjusting the pH value, and continuing to stand, so as to obtain a silicon-containing dispersion liquid; mixing the bleached rice straw fibers with an alkaline alcohol solution and activating, then adding chloroacetic acid for etherification reaction, so as to obtain carboxymethyl cellulose; mixing a polyvinyl alcohol solution and the carboxymethyl cellulose solution, and adding the silicon-containing dispersion liquid under stirring, and then supplementing water, so as to obtain the rice straw-based liquid mulch emulsion. The rice straw-based liquid mulch emulsion prepared by the application can be applied to the covering of cultivation soil, has the advantages of excellent film forming strength, toughness, light shielding and soil covering adaptability, and the like, and has the advantages of wide raw material sources, simple preparation process and suitability for large-scale popularization.

The present application relates to a kind of grape seed fermentation raw pulp skin care product and its preparation method and application.The preparation method includes that grape seed powder is mixed with water after cellulase and pectinase enzymolysis, then access lactic acid bacteria fermentation;When the fermentation liquor reaches specific pH and free lactic acid content, first add alginic acid oligosaccharide and sodium phytate, stir then add gluconolactone and low-substitution hydroxypropyl cellulose, continue fermentation, sterilization and filtration, obtain grape seed fermentation raw pulp;Then the raw pulp is mixed with humectant, thickening agent, preservative aid and water, and skin care product is prepared.The present application is controlled by two-stage during fermentation ripening stage, so that oligomeric procyanidins, organic acid salt and ripening control component form relatively stable dispersion state, reduce the risk of fine sedimentation, kneading mud and uneven coating film rubbing when applying after hard water cleaning.

The invention provides a positive electrode active material and a preparation method thereof, a positive electrode plate, a battery and electric equipment, the positive electrode active material comprises LiNi [alpha] Co [beta] Mn [gamma] Sb [delta] R [epsilon] O2, R comprises one or more of Mg, Al, Sr, Y, Zr, Sn, W, Ta and Nb, and [alpha] lt is greater than or equal to 0.95; 1.0, 0 lt; beta is less than or equal to 0.03, 0lt; gamma < = 0.03, 0.001 < = delta < = 0.008, 0.001 < = epsilon < = 0.003, and 0.995 < = alpha + beta + gamma + delta + epsilon < = 1.005; and the cell parameters a of the positive electrode active material are equal to 2.874 to 2.878, and the cell parameters c of the positive electrode active material are equal to 14.200 to 14.205. The positive electrode active material provided by the invention can give consideration to both high capacity and long-term cycle stability.

The utility model provides a kind of folding multifunctional travel draw-bar box, it is related to draw-bar box technical field, including box, the bottom of box is provided with gyro wheel A, the top of box is provided with draw-bar body, the right side fixed mounting of box is provided with lock block, the left side fixed mounting of box is provided with support block, the surface of box is provided with lid, the bottom of lid is provided with gyro wheel B, the right side of lid is provided with lock cover, the inside of lid is provided with extension plate, improve practicality and user experience, the synergistic effect of extension plate, adjusting groove, limit block and sliding groove, give box space height adjustability, adapt the classification storage needs of different size articles, the combination design of threaded rod and steering handle further simplifies the operation process of article fixation, avoid displacement or damage due to vibration in the process of transportation, overall structure gives consideration to flexibility and stability, meet the efficient storage and convenient carrying needs under multiple scenes.

The utility model relates to the technical field of indwelling needle fixation, specifically is a kind of indwelling needle fixing bandage.The utility model discloses indwelling needle fixing bandage including finger sleeve, it is equipped with the first extension section extending to the dorsal direction of the patient's limbs on finger sleeve, and the second extension section extending to the palm direction of the patient's limbs, since the first extension section and / or second extension section are greater than preset length, can be wound around the patient's limbs at least one week when the first extension section is connected with the second extension section.The technical scheme will finger sleeve be worn on the thumb of the patient's limbs, and be fixed by the first extension section and the second extension section around the limbs, the indwelling needle on the dorsal of the limbs is fixed, and the indwelling needle on the limbs of different sizes can be fixed;And since the first extension section and the second extension section are opposite in tension direction when fixing indwelling needle, finger sleeve will not be tight due to one-way pulling thumb, and then the stability and comfort of indwelling needle fixation are considered.

The invention relates to the technical field of high-activity metal powder, in particular to high-environmental-stability aluminum-lithium alloy powder and a manufacturing method and application thereof.The high-environmental-stability aluminum-lithium alloy powder comprises, by weight, 1.0-10.0 wt.% of Li, 1.0-10.0 wt.% of Al, 1.0-10.0 wt.% of Ti, 1.0-10.0 wt.% of Ti, 1.0-10.0 wt.% of Ti, 1.0- 0.1 to 5.0 wt.% of Zr; 0.01 to 2.0 wt.% of Ti; 0.05 to 3.0 wt.% of RE; wherein RE is a rare earth element and at least comprises Y, Ce, La or a combination thereof, the sum of Zr, Ti and RE does not exceed 8.0 wt.%, and the balance is Al and inevitable impurities. The method has the effect of improving the use stability and the machining consistency of the aluminum-lithium alloy powder.

The application discloses an elastic sealing material for inner liner of a puncture-proof tire and a preparation method thereof, and relates to the technical field of tire sealing materials.The application comprises the following steps: uniformly mixing microgel, brominated butyl rubber 96.5%-98.8%, dicumyl peroxide 0.6%-1.0% as a pre-crosslinking agent, zinc oxide 0.4%-1.2% and stearic acid 0.2%-0.8% according to the mass percentage, and performing pre-crosslinking treatment; and cooling, crushing and grading the particle size of the pre-crosslinked material to obtain crosslinked brominated butyl rubber microgel with a D50 particle size of 1.0-4.0 microns; the gel content of the crosslinked brominated butyl rubber microgel is 75%-90%, and the swelling ratio is 1.8-3.2.The application disperses the crosslinked brominated butyl rubber microgel in a continuous halogenated butyl airtight phase and forms an ion crosslinking structure by preparing crosslinked brominated butyl rubber microgel, interfacial pre-dispersed material and ion crosslinking vulcanized rubber material.The method makes the elastic sealing material have the inner liner body elastic retraction and hole closing ability, and reduces the dependence on a high viscous flow type self-sealing rubber layer.