3470results about How to "Reduce shock" patented technology

The invention discloses an optimization control method for a hydrogen fuel cell, and relates to the technical field of cell optimization control. The method comprises the following steps: designing a control algorithm: designing an algorithm according to characteristics and environmental parameters in a starting stage to control gas supply and electric pile preheating so as to realize rapid and stable starting, and monitoring, adjusting and maintaining the optimal working state of the electric pile through a self-adaptive algorithm in steady-state operation, power adjustment achieves accurate power response based on a prediction algorithm in combination with related information planning, a flow is formulated in a closing stage to reduce power, and cooling and purging are started to protect the battery. Rapid starting and efficient energy conversion are achieved through the control algorithm, energy loss is reduced, the operation efficiency is improved, and the energy consumption is reduced. A comprehensive monitoring and fault detection system is established, energy flow is optimized through an intelligent energy management mechanism, reasonable energy distribution under different driving working conditions is achieved, and the overall efficiency of the system is improved.

The invention belongs to the technical field of power prediction, and discloses a new energy power prediction method and system based on multi-source meteorological data fusion, and the method comprises the steps: obtaining meteorological data from different meteorological data sources in real time or at regular time through a data obtaining module; carrying out preliminary screening and preprocessing on the obtained data by utilizing a data processing module; the data fusion module is used for integrating meteorological data from different sources by adopting an advanced data fusion algorithm to eliminate data redundancy; a mathematical model or a machine learning model suitable for new energy power prediction is constructed by using the prediction model module based on meteorological data of multi-source fusion; and the result output and evaluation module is used for outputting the prediction result to a user in a visual form, and carrying out real-time or regular evaluation on the prediction result. The method has the characteristics of diversified data sources, advanced data fusion technology, flexible prediction model construction, high real-time performance and accuracy, wide application scenarios and the like.

The invention relates to the technical field of traffic emergency evaluation, and discloses a comprehensive traffic network toughness evaluation method based on multiple indexes, which comprises the following steps of: in a pre-stage, selecting a plurality of key indexes for evaluating the traffic network toughness; an in-event stage: when an emergency occurs, acquiring real-time traffic data based on the evaluation model; and a post-event stage: after the emergency event is ended, analyzing the influence of the event on the traffic network, and evaluating the recovery capability of the traffic network based on the evaluation model in combination with the restoration time of the facility, the traffic flow recovery condition and the emergency resource allocation record. A topological structure index, a traffic flow index, a facility reliability index and an emergency response capability index are adopted, the robustness of the traffic network under different dimensions can be comprehensively evaluated, through multi-dimensional quantitative analysis, the impact resistance, the recovery capability and the emergency management capability of the network can be comprehensively evaluated, and the evaluation accuracy is improved.

A buffering hardware hinge outside a cup comprises a hinge cup and a hinge arm, the hinge cup and the hinge arm are connected in a hinged mode through an upper connecting rod and a lower connecting rod, a guide groove penetrating through a body is formed in the bottom of the hinge cup, and a driving plate is installed at the outer bottom of the hinge cup in a covering mode; a sliding block is arranged on the top of the driving plate and installed in the guide groove in a sliding mode. The end, facing the hinge cup, of the upper connecting rod extends outwards to form a driving arm, and when the hinge is closed, the driving arm acts on the sliding block to push the sliding block to slide in the guide groove; a buffer is fixedly mounted at the outer bottom of the hinge arm, a piston rod or a cylinder body part of the buffer is connected with the driving plate, and the buffer has a damping effect on the movement of the driving plate, so that the damping effect when the hinge is closed is realized. The device has the beneficial effects that the buffer is installed outside the hinge arm, through the design of the guide groove and the driving plate, the external space is effectively utilized, and the problem that the internal space is limited is avoided.

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention discloses an active power distribution network two-stage island division method and system considering flexible resource support. The method comprises the following steps: establishing a first resource allocation model considering energy storage and controllable load, the first resource allocation model comprises energy storage battery charging and discharging upper and lower limit constraints, an energy storage battery degradation cost model, a controllable load model and a controllable load related user protocol; obtaining parameter data of a target power distribution system, wherein the parameter data comprises a line parameter, a load level, a load level, a network topology connection relationship, a system operation voltage level and branch current limitation, a system fault position, a reference voltage and a reference power initial value; and according to the parameter data, establishing a mathematical model for two-stage island power supply recovery based on a first resource allocation model. The method for solving the island is simple and convenient, the island recovery amount can achieve the optimal recovery effect, meanwhile, the search time is greatly shortened, the solving efficiency is higher, and the rapid power supply recovery capacity of the power distribution network is improved.

The invention discloses a buffer type nuclear power stop valve suitable for a high-pressure environment, and relates to the technical field of nuclear power stop valves, the side face of a valve body is fixedly connected with a connecting component, and one end of the valve body is fixedly connected with a cleaning component. By means of the structure, the screen plate filters impurities in fluid, the impurities mixed with the fluid are prevented from entering the valve body and scratching the side face of the valve body, meanwhile, the fluid impacts and enters the valve body through the screen plate, the fluid impacts the screen plate, and therefore the fluid is prevented from entering the valve body. The mesh plate drives the ejection mechanism to be far away from the mesh plate through the telescopic rod, meanwhile, through impact force of fluid to the mesh plate, part of impact force is absorbed, impact of the fluid to the valve clack during opening is relieved, and an effective buffering effect can be provided in a high-pressure environment.

The invention discloses an electric energy safety management system and method based on a cloud platform, and relates to the technical field of electric energy safety management, and the scheme comprises the steps: collecting the operation data of a micro-grid unit in a power grid, and transmitting the operation data to the cloud platform; judging whether the operation data at each time point is abnormal or not; constructing a topological structure of the power network according to the physical connection between the micro-grid units; dividing all nodes into different areas, calculating a comprehensive evaluation value of each node, and selecting the node with the highest comprehensive evaluation value as a local center node of each area; and when a plurality of micro-grid units in any area have an electric energy safety fault, calculating the priority of each fault node according to the local aggregation coefficient of the fault node and the connectivity between the fault node and the local center node, and performing maintenance according to the priority of the fault node. And comprehensive monitoring and management of the electric energy quality are realized.

The invention relates to the field of circuit breakers, in particular to a primary and secondary fusion pole-mounted circuit breaker which comprises a primary and secondary fusion circuit breaker body, the primary and secondary fusion circuit breaker body comprises a fixing frame, a bottom bin is installed on the rear portion of the fixing frame, bottom columns are arranged in the bottom bin, and bottom grooves are formed in the bottoms of the bottom columns; one side in the bottom groove is in meshed connection with a tooth column, the tooth column is fixedly connected to the middle of the periphery of a rotating shaft, the rotating shaft is rotationally connected to the middle in the bottom bin, the two ends of the periphery of the rotating shaft are fixedly connected with connecting gears through pneumatic expansion heads, and a first branching part and a second branching part are installed on the two portions in the bottom bin correspondingly; through mutual energy storage of the first tapping part and the second tapping part, automatic energy storage work can be achieved, compared with traditional equipment, use of a reset motor is omitted, line arrangement is reduced, meanwhile, electric field interference to the circuit breaker when the reset motor works is avoided, the occurrence rate of abnormity is reduced, and circuit safety is facilitated.

The invention discloses a mining electric shovel trajectory planning method based on a whole-process asymmetric multi-section S-shaped curve, and belongs to the technical field of trajectory planning. First, material surface point cloud data are obtained and processed. Secondly, establishing a mathematical model of the mining electric shovel motor based on a whole-process asymmetric multi-section S-shaped curve speed control algorithm; thirdly, constructing a trajectory equation of the bucket tooth tip of the mining electric shovel; and fourthly, giving a constraint boundary. And 5, constructing a mathematical model of a target function and a constraint function based on the whole-process asymmetric multi-section S-shaped curve speed control algorithm. And 6, inputting an optimization initial value, and performing optimization. And 7, outputting an optimal mining track, and ending optimization. On the basis of a traditional seven-section S-shaped curve speed control algorithm, the maximum speed of the motor of the mining electric shovel and the running time of each section of the motor can be optimized and adjusted, and online planning and energy consumption optimization of the mining electric shovel excavating track are achieved; complex motion characteristics in the excavation process can be effectively captured, and efficient operation under various working conditions is ensured.

The invention belongs to the technical field of rock-soil side slope protection, and particularly relates to an expansive soil side slope flexible ecological comprehensive supporting system which comprises an intercepting ditch, a vegetation protection layer, a composite waterproof layer, flexible anchor rods, water seepage and drainage pipes, cultivation and planting soil, a drainage ditch, a backfill soil layer, a step-shaped slope surface, a slope surface and slope protection vegetation. The slope surface is excavated into a step-shaped slope surface, a composite waterproof layer, expansive soil backfill soil, a vegetation protection layer and cultivation and planting soil are sequentially arranged on the step-shaped slope surface from bottom to top, and slope protection vegetation is planted and formed on the cultivation and planting soil; the composite waterproof layer is fixed to the step-shaped slope face through the flexible anchor rods. The vegetation protection layer and the slope protection vegetation together reinforce the shallow soil body, and the composite waterproof layer and the flexible anchor rod play a role in absorbing and relieving the received expansive force. The method has an ecological greening effect, has the functions of common supporting of the shallow surface layer and the deep layer of the expansive soil slope, flexible reinforcement and expansion reduction and allowable generation of a small amount of deformation, is simple in construction and high in efficiency, and can realize long-term stability of the shallow surface layer and the deep layer of the expansive soil slope.

The invention relates to the technical field of valves, and discloses a self-adaptive flow proportion stop valve which comprises a valve body, a valve rod, a valve rod, a valve rod and a valve rod. The liquid inlet pipe is used for introducing fluid into the stop valve, and the liquid inlet pipe is fixedly connected to the left side of the valve body; and the liquid outlet pipe is used for discharging the fluid from the stop valve. According to the stop valve self-adaptive to the flow proportion, the cutting mechanism is arranged, when liquid passes through the impeller, the impeller is driven to rotate clockwise, and the cutting column rotates reversely relative to the impeller, so that pressure fluctuation in the liquid flowing process can be effectively relieved, the water hammer effect or impact caused by sudden pressure change is reduced, and other assemblies in a system are protected; particularly, when the liquid flow is large or the flow speed is high, the rotating action of the cutting column rotating reversely relative to the impeller is beneficial to generating a resistance mechanism in the liquid flowing process, and the reverse power action can consume part of kinetic energy of the liquid, so that sudden pressure fluctuation possibly generated in the fluid is relieved.

The invention discloses a machining control method, device and system based on a five-axis machining machine tool and a medium. The method comprises the steps that geometrical characteristic parameters of a to-be-machined workpiece and tool characteristic information are obtained, a cutting force model is established according to the obtained geometrical characteristic parameters, and cutting force distribution conditions under different paths are calculated; in the cutting force model, based on the cutting force distribution condition and the geometric feature parameters, generating an optimal cutter path corresponding to the cutter feature information by using a path optimization algorithm; according to the generated tool path and tool feature information, establishing a simulation environment of the five-axis machining tool, and simulating motion states of the tool in different paths; in the simulation environment, setting a reward function including path smoothness and cutting force stability; using a reinforcement learning algorithm to optimize the fairness of the tool path, and generating a smooth tool path; verifying the generated smooth tool path in a simulation environment; and triggering a processing execution instruction. The machining precision and the surface quality are improved.

The invention relates to the technical field of aluminum substrate processing, in particular to a television backlight aluminum substrate conveying and discharging structure with high stability, which comprises a conveying frame serving as a basic supporting part of the whole conveying structure; the discharging frame is installed on the upper portion of the conveying frame and used for discharging of the aluminum substrates, and a limiting assembly is installed on the inner side of the discharging frame; the conveying mechanism is installed on the inner side of the conveying frame and located below the discharging frame, and kinetic energy is provided for conveying the aluminum substrates; and the discharging mechanisms are mounted on the two sides of the surface of the discharging frame and are symmetrically arranged. According to the discharging device, the limiting assembly is arranged to be matched with the discharging frame, when an aluminum substrate is placed in the discharging frame, limiting plates on the two sides are pushed, then the limiting plates can push connecting rods and first elastic pieces to move, and after the aluminum substrate is located in the discharging frame, the limiting plates can be pushed to clamp and limit the aluminum substrate through the elastic effect of the first elastic pieces; and therefore, the shaking of the device during movement is reduced, and the transportation stability is improved.

The invention discloses an industrial silicon intelligent power distribution and control system and method. The system comprises a data acquisition and processing module, a shared feature extraction module, an intelligent control module and a power distribution module which are connected in sequence. Multi-mode operation data is collected in real time, a shared feature extraction module is adopted to perform feature extraction on the operation data, data input is provided for subsystems of the intelligent control module, and information isolated island is avoided; through cooperative work of all the modules, global optimization control over the industrial silicon production process is achieved. The intelligent control module comprises an intelligent industrial silicon submerged arc furnace baking system, an automatic electrode lifting system, an automatic submerged arc furnace transformer gear adjusting system and an automatic electric energy quality adjusting system, and each system performs task prediction based on corresponding characteristics by adopting a pre-trained model and outputs optimized parameters; and the power distribution module generates a power distribution instruction based on the optimization parameters, so that intelligent distribution of power resources is realized, and dynamic adjustment and optimal distribution of energy consumption are realized.

The invention belongs to the technical field of refrigerant filling, and particularly relates to a refrigerant filling device with a vacuum leak detection function, which comprises a displacement plate, a box body, a controller, a liquid storage tank, a vacuum pump, a manifold assembly, a booster pump and a connecting pipe assembly, and the connecting pipe assembly is connected with a balance assembly; the connecting pipe assembly comprises a manifold head, and the manifold head is connected with the balance assembly through a corrugated pipe. When the refrigerating system is vacuumized, air and water in the refrigerating system are pumped away through the vacuum pump, the sealing plate, the connecting ring and the corrugated pipe synchronously move towards the manifold head under the action of negative pressure, the connecting ring drives the corrugated pipe to be folded, and when the reset spring is stretched to the limit, the corrugated pipe is completely folded; moisture in the annular groove of the corrugated pipe is extruded out of the annular groove and pumped away through the vacuum pump, the corrugated pipe is in a completely folded state, the space of the annular groove is controlled to be in an extremely small range, the moisture is not prone to entering the annular groove when passing through the corrugated pipe, and moisture accumulation in the annular groove is avoided.

The invention discloses an aluminum alloy wheel multi-pouring-gate casting mold, method and equipment, the aluminum alloy wheel multi-pouring-gate casting mold comprises an upper mold plate and a bottom plate, an upper mold is arranged on the upper mold plate, an outer core pulling block is arranged on the outer side of the upper mold, a lower mold base is arranged on the bottom plate, a lower mold is arranged on the lower mold base, and the upper mold, the lower mold and the outer core pulling block jointly form a casting blank cavity. A transverse pouring gate matched with a product is arranged on the lower die base, a plurality of inner pouring gates communicated with a casting blank cavity are arranged on the inner side of the transverse pouring gate, a vertical pouring gate is arranged between the parting surfaces of the outer core pulling block and communicated with the transverse pouring gate and the casting blank cavity, a side pouring gate communicated to the transverse pouring gate is arranged on the outer side of the bottom plate, and the side pouring gate is communicated with the inner pouring gate. According to the structure, the transverse pouring gate, the inner pouring gate and the vertical pouring gate are used in cooperation, so that the feeding distance is greatly shortened, the feeding effect of all parts of a casting is improved, and then the casting quality is improved.

The invention provides a control method of a high-gain image sensor, which is characterized in that a column bias current source and a column PMOS (P-channel Metal Oxide Semiconductor) amplifier tube are arranged in a column signal reading unit, the column bias current source is connected with a current output connecting line shared by a column, and a drain electrode of the column PMOS amplifier tube is connected with a current input connecting line shared by the column; the grid electrode of the column PMOS amplifier tube is connected with the common current output connecting line of the column directly or through a capacitor, and an amplified signal of a floating diffusion region of a read-out pixel unit can be obtained on the common current input connecting line of the column, so that the ultrahigh conversion gain is realized, and the dynamic range in a dark light scene is expanded; the size of a device structure in the column signal reading unit can be far larger than that of a transistor in a pixel, the process consistency is better, and the conversion gain can be adjusted more flexibly; the switching between the SHCG mode and the STD mode is realized by driving the switch module in the column signal reading unit, the impact on a power supply and the ground is smaller during operation, and the circuit stability is improved.

The invention relates to the technical field of batteries, and discloses a battery and a battery pack. The shell is made of steel and is of a quadrangular prism structure, the shell comprises a shell body and a cover plate, at least one end of the shell body is open, and the cover plate is welded to the open end of the shell body to form a welding area; the tensile strength of the welding area is F, the first surface of the shell is provided with a pressure relief structure, the projection area of the pressure relief structure on the first surface is S, the area formed by enclosing of the first surface is S0, F * (S / S0) is larger than or equal to 8 and smaller than or equal to 400, the unit of F is MPa, the unit of S is mm < 2 >, and the unit of S0 is mm < 2 >. By comprehensively controlling the tensile strength F and the occupied area S / S0 of the pressure relief structure on the first surface, more serious safety accidents such as blockage of the pressure relief structure by the battery cell, incapability of normal pressure relief, burst-open of the cover plate and ignition of the battery when thermal runaway of the battery occurs are avoided, so that the safety of the battery is ensured.

The invention relates to the field of multi-way valves, and particularly discloses an integrated actuator type heat management multi-way valve which comprises a multi-way valve mechanism and an actuator mechanism. The multi-way valve mechanism comprises a multi-way valve body assembly, and a valve element assembly is arranged in the multi-way valve body assembly. The actuator mechanism comprises an actuator protection box assembly installed on the upper side of the multi-way valve body assembly, and an actuator assembly is installed in the actuator protection box assembly. According to the multi-way valve, the actuator assembly drives the valve element assembly to rotate in the multi-way valve body assembly, the flow direction of fluid such as cooling liquid and heating media can be accurately controlled, and the accurate control is beneficial to optimizing the performance of a heat management system; according to the thermal management multi-way valve, the actuator mechanism and the multi-way valve mechanism are integrated together and protected through the actuator protection box assembly, so that the structure of the whole thermal management multi-way valve is more compact, and the compact structure is beneficial to saving installation space and reducing system complexity and is convenient to maintain and operate.

The invention discloses an unmanned aerial vehicle visual guidance obstacle avoidance system and method based on polarization information, and relates to the technical field of unmanned aerial vehicle navigation and obstacle avoidance. Polarization image information in a flight scene is collected in real time through a polarization sensor, and the perception capability of a complex environment is enhanced. Polarization parameters are extracted through a compression observation method, the efficiency and accuracy of feature extraction are improved, a visual attention mechanism is combined, an obstacle background area is accurately recognized, a self-adaptive decision fusion model is constructed, the feature weight is optimized, and the reliability of target contour features is enhanced. Preliminary path search is carried out based on target contour features, and a centralized optimization sampling method is adopted, so that the probability of generating an optimal flight path in a complex environment is effectively improved. And the obstacle avoidance flight module is used for smoothing the flight path, so that the smoothness and controllability of the flight path are ensured, and the navigation and obstacle avoidance capabilities of the unmanned aerial vehicle in a complex environment are effectively improved.

The utility model relates to the field of circuit protection, in particular to a contactor integrated with an excitation function, and an excitation ignition assembly, a first piston, a first conductive part, an auxiliary contact system, a push rod, a melt, an air passage, a second piston and an elastic part are integrated in the contactor. The melt and the auxiliary contact system are connected in series and then are connected in series between the two static contacts. In a normal working state, the auxiliary contact system is insulated and disconnected, when an overload current, a short-circuit current or an abnormal condition occurs, the ignition assembly is excited to act to drive the first piston and the first conductive piece to move, the first conductive piece enables the auxiliary contact system to be conducted and closed, and the melt is connected into a main loop in a parallel connection mode; and then the second piston and the elastic piece are driven to displace through the air passage, so that the contact system is switched off, the elastic piece generates irreversible deformation, and the first piston and the first conductive piece push the push rod to disconnect the melt. According to the invention, the power loss is low, zero-current cut-off of a main loop can be realized, and the breaking capacity and the breaking reliability are improved.

The invention relates to the technical field of welding industrial robots, and discloses a damping device for an arm of a welding industrial robot, which comprises a base, a mechanical base, a mechanical arm and an end effector, and a second spring in a damping cylinder at the top end of the damping device is matched with a damping column I of the mechanical base; arm weight, dynamic load and ground vibration borne by the base are effectively dealt with, it is avoided that vibration is transmitted to the mechanical arm to affect welding precision, a second spring releases energy through deformation conversion during vibration, the mechanical base and the arm are subjected to shock absorption, and when shock absorption is not needed, the mechanical base and the arm can be tightly connected through a top bolt and other components and absorb energy through friction rubber. The fixing rod is taken down when the connecting position of the end effector does not need damping, the first spring conducts damping on the connecting position of the mechanical arm and the rotating connecting block, the situation that the welding position is not accurate due to track deviation of the mechanical arm is avoided, the fixing rod is used for limiting and fixing when damping is not needed, and a friction plate on a connecting column can absorb vibration impact; efficient and accurate welding operation and stable operation of equipment are guaranteed.

The invention discloses a pneumatic control valve with toughness, relates to the technical field of valves, and aims to solve the problem that a valve rod of an existing pneumatic control valve does not have a self-repairing function. According to the pneumatic control valve, at least part of a rod section, located in a flow channel of a valve body, of a valve rod is arranged to be a tough rod section, and the tough rod section is mainly composed of a rod section body, a first rod barrel and a second rod barrel, wherein the rod section body is sleeved with the first rod barrel and the second rod barrel which are coaxially connected through a first flexible structure; when the pneumatic control valve works normally, the rod section main body of the tough rod section is mainly used for power transmission, and when the rod section main body of the tough rod section is broken after the valve rod is seriously impacted, the first rod barrel and the second rod barrel which are connected through the first flexible structure can replace the rod section main body for power transmission, so that the function of the tough rod section is automatically recovered; self-repairing of the valve rod is achieved, and it is ensured that the pneumatic control valve can rapidly recover to work normally.

The invention relates to a construction method of an anti-typhoon sea wave sea-crossing steel trestle and platform adjacent to a residential building. The construction method comprises the steps that firstly, deep fusion application of BIM and VR is conducted; step 2, surveying and setting out; step 3, embedding steel bars and pouring strip-shaped concrete; fourthly, the steel pipe piles are transported and lengthened; fifthly, steel pipe piles are driven; sixthly, parallel connection and diagonal bridging construction is conducted; seventhly, bearing beams are installed; eighthly, longitudinal beams are installed; ninthly, the distribution beams are installed; tenthly, bridge deck slabs and guardrails are installed; and 11, an intelligent monitoring and early warning system.

The invention belongs to the technical field of open caisson construction, and particularly discloses a large press-in type rectangular open caisson structure deviation rectifying construction method which comprises the steps that a plurality of monitoring points are arranged on the two long side portions of a rectangular open caisson; the rectangular open caisson continuously sinks into the side sinking channel; acquiring an elevation value between each monitoring point and the port of the side sinking channel in real time; whether the rectangular open caisson needs to be rectified at the current moment or not is judged according to the difference value of the elevation values between the monitoring points; respectively drawing elevation curves of the two long side parts according to the elevation value at the current moment; according to the elevation curve, determining the adjustment amount required for correcting the rectangular open caisson, adjusting the postures of the two long side parts through the adjustment amount, and updating the elevation curve in real time; the method has the following advantages that accurate control over the rectangular open caisson is achieved through real-time monitoring and deviation rectification in the sinking process, the method adapts to complex projects such as underground stations and pipe galleries, the construction efficiency is improved, manual dependence is reduced, meanwhile, the urban environment is effectively protected, and surrounding influences are relieved.

The invention relates to the technical field of medical oxygen generators, and discloses an efficient and energy-saving PSA oxygen generator which comprises an adsorption tank, a gas inlet pipeline, a nitrogen discharge pipeline, an I-shaped balance pipeline, a first purging pipeline, a second purging pipeline, an oxygen outlet pipeline, a purity measurement pipeline, a qualified gas pipeline, an unqualified gas pipeline and an emptying pipeline, a throttling element is arranged on each of an inlet pipeline and an outlet pipeline of the adsorption tank and used for controlling the flow of gas when the adsorption tank is balanced, impact of high-speed gas on a molecular sieve is avoided, oxygen-enriched air can stay at the top of the adsorption tank in various balance modes, and desorbed low-concentration oxygen is adsorbed again to obtain the oxygen-enriched air. And the oxygen recovery rate is improved, so that the air consumption is reduced, the required power of an air compressor is reduced, and the energy consumption required by oxygen production is reduced.

The invention relates to the technical field of cloud computing, in particular to a method and a system for realizing ARP (Address Resolution Protocol) attack prevention of a credential operating system without occupying CPU (Central Processing Unit) resources, which comprises the following steps of: directly taking over an RX direction data packet of a network card by utilizing an XDP (Extensible Data Processing) technology of an operating system kernel so as to filter the network data packet before a network protocol stack of the operating system kernel; a control interface is added, is used for controlling opening and closing of an ARP protection function and is responsible for issuing and deleting rules, and meanwhile, a time parameter T and the maximum message number Max within T time are configured; compared with the traditional ARP anti-attack technology, the method and the system for realizing the ARP anti-attack of the credential operation system without occupying the CPU resource have the beneficial effects that the ARP message is directly filtered at a network card drive inlet, so that the impact of the ARP attack message on the CPU is reduced; the operating system has an ARP anti-attack function, does not depend on a third-party application, and is safe and reliable; the self-adaptive ARP filtering technology can intelligently adjust an ARP blacklist, and when an attack source returns to normal, ARP learning can be automatically recovered.

The invention belongs to the technical field of wind power generation, and particularly relates to a wind storage combined system for coordinated control of hybrid energy storage equipment and a control method. Wherein the wind generating set is used for converting wind energy into electric energy and outputting the electric energy to a power grid; the energy storage equipment comprises a battery energy storage system and a super capacitor; the direct current bus is used for being connected with the wind generating set, the battery energy storage system and the super capacitor through a control system and performing energy exchange with a power supply grid; and the control system is used for carrying out coordinated control on the energy storage equipment based on different power regulation requirements. According to the invention, the problems of power grid frequency fluctuation and power imbalance caused by wind speed fluctuation of the wind power generation system can be solved. Two different types of energy storage devices are integrated, cooperative regulation and control are carried out by utilizing respective characteristics of the energy storage devices, and power dispatching and frequency modulation control of different time scales are realized, so that the stability of a wind power generation system and the reliability of a power grid are improved.

The present invention relates to the field of chip placement machine control technology, and specifically discloses a trigonometric function curve planning method and system with continuous jerk, and a chip placement machine. The method includes the following steps: dividing the curve planning into an acceleration section, a uniform speed section, and a deceleration section, and the acceleration section and the deceleration section are respectively divided into a jerk section, a uniform acceleration section, and a deceleration section; setting and initializing the motion parameters of the curve planning; defining the average acceleration ratio of the deceleration section to the acceleration section as a softening factor, and defining the maximum acceleration in the deceleration section or the acceleration section to the average acceleration ratio as an acceleration coefficient; calculating the time nodes of each stage of the curve planning according to the motion parameters, the softening factor, and the acceleration coefficient; and updating the state of each stage of the curve planning according to the time nodes. In combination with the continuous characteristics of the second-order derivative of the trigonometric function, an S-curve planning with continuous jerk is designed, which effectively reduces the motion impact, ensures the stable time in place, and is simple to operate.