71results about How to "Achieve perturbation" patented technology

A screening apparatus for green tea processing based on the electromagnetic vibration principle comprises a housing and an upper cover; the inner wall of the housing is provided with a slideway, a slide screen is arranged on the slideway, soft iron is arranged at the lower center of the slide screen, the inner bottom of the housing is provided with a first cavity right below the soft iron, an electromagnetic core is arranged in the first cavity, an electromagnetic coil is wound on the electromagnetic core and is electrically connected with a power supply, a plurality of first springs are alsoarranged at the inner bottom of the housing, the slide screen is positioned above the first springs, the upper portion of the housing is provided with an exhaust pipe, and the exhaust pipe is connected with a dust collector positioned outside the housing. The screening apparatus for green tea processing based on the electromagnetic vibration principle has the advantages that the dust collector sucks out dust in the housing to effectively protect body health of an operator; the slide screen is vertically vibrated through the first springs and the electromagnetic coil, and efficient screening ofgreen tea is achieved. The apparatus for green tea processing based on the electromagnetic vibration principle is reasonable in structural design and simple to operate.

The invention relates to a multi-group section perturbation method for uncertainty analysis of reactor physics calculation. The multi-group section perturbation method comprises the following steps: (1), on the basis of ENDF/B, making a multi-group section database and a point-by-point section database at different temperatures by using a nuclear database section processing program NJOY, and making the point-by-point section database in a resonant reaction channel at a resonant energy section into an ultra-fine-group database according to the equal rib width; (2), perturbing the point-by-point section database in the energy section corresponding to a certain energy group in a certain reaction channel so as to obtain a perturbed point-by-point section database; (3), strictly transferring perturbation of the point-by-point section database into the multi-group section database by using a linear and nonlinear perturbation transferring method; and (4), reconstructing by adopting a reaction channel section self-consistency principle to obtain a perturbed multi-group section database. According to the invention, the section of a basic reaction channel can be finely sampled; approximate treatment in the multi-group section perturbation process can also be reduced; and thus, a precise multi-group section sample can be obtained.

Provided is a steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement. First, an electrode is arranged on the head of a user, a detected electroencephalogram signal is sent to a computer, then movement stimulating units are presented in front of the user through a computer screen at the same time, the movement stimulating units are shielded by two-dimensional noise points obeying Gaussian distribution, the noise point update frequency is synchronized with the screen refresh rate, and the noise strength is represented by Gaussian distribution standard deviation. After the movement stimulating units are formed, the user watches any one of the movement stimulating units, a computer acquires a stimulation starting flag bit and a stimulation finishing flag bit, a computer signal is acquired through a test electrode, the significance probabilities of different stimulation targets are calculated, the targets are judged and indicated through the screen, and then the next target identification is conducted. The steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement can remarkably enhance brain response strength of the user, improve precision and efficiency of an existing brain computer interface, and innovatively improve practical level of the brain computer interface technology.

The invention provides a multidirectional corrugated inner finned tube which comprises an outer tube, a plurality of multidirectional corrugated inner fins are uniformly distributed on the inner circumferential face of the outer tube. Each multidirectional corrugated inner fin comprises a root, two straight walls and two bends. Multidirectional corrugated patterns are distributed on the two straight walls, and lines of the multidirectional corrugated patterns on the same straight wall are consistent in tendency. The bends and the inner surface of the outer tube are in a brazing manner. The straight walls extend radially along the outer tube. The outer tube and the multidirectional corrugated inner fins form a plurality of parallel circulating channels. The multidirectional corrugated inner finned tube provided by the invention has various structural patterns and is easy to form and process. Compared with an optical tube, the effective heat transfer area is remarkably increased, so that the flow medium flow pattern in the tube is forcibly guided. The secondary flow is enhanced, the transverse turbulent flow is aggravated, the turbulivity is increased and the boundary layer of a flow medium is strongly interfered, so that the purpose of efficiently enhancing the heat transfer is realized. Meanwhile, the vertical flowing resistance in the tube can be controlled. Compared with the common finned tube, the resistance is remarkably reduced with the same thermal load.

The invention provides an impedance measurement method of a three-phase alternating current system. The impedance measurement method of the three-phase alternating current system includes the following steps that a frequency sweeping signal sent by the output end of a network analyzing instrument is linked with a frequency detecting link, and the real-time frequency of the frequency sweeping signal is obtained through the frequency detecting link; the real-time frequency obtained by the frequency detecting link subtracts or adds a synchronizing frequency according to the measuring step. After the frequency is processed and obtained through the mentioned steps, an angle changing along with variation of the frequency is obtained through an integration element and consequentially, a sinusoidal signal is further generated and injected into a detected system. A voltage and current signal of a boundary of a system source module and a loading module is collected to carry out dq conversion. The converted signals are sequentially returned to the network analyzing instrument through a multiplexer. Two sets of voltage and current signals which are eight in total are obtained by the network analyzing instrument and used for setting up equation sets, the equation sets are combined for concluding a solution and then, the impedance of the detected system can be obtained. The set-up testing system is simple in structure and late-stage data are easy to process.

The invention provides a reservoir underwater walking sand suction and discharge device. The device comprises a working ship, a water pump, an air pump, a windlass and a positioning system arranged on the working ship, and a porous sand suction disc arranged on a silting bed surface of the bottom of a reservoir. An annular air cavity is formed in the porous sand suction disc; a sand punching hole and a sand suction hole are formed in the porous sand suction disc; the water pump is communicated with the sand punching hole through a water charging pipe; the sand suction hole is connected into a dam sand discharge hole through a sand conveying pipe; the air pump is communicated with the annular air cavity through an inflation pipe; and the windlass is connected with the porous sand suction disc through a traction steel rope. The device is arranged in a reservoir area; high-pressure water is injected in the sand punching hole of the porous sand suction disc through the water pump for dispersing and disturbing silted sediments of the reservoir; a high-concentration water and sand mixture is sucked through the sand suction hole of the porous sand suction disc and the sand conveying pipe for realizing efficient dam passing of the silted sediments of the reservoir; the dispersion, the disturbance and the suction of the silted sediments at the bottom of the reservoir can be synchronously realized; high-concentration muddy water is easy to form; the water consumption is low; and the sand sucking and desilting efficiency is high.

The method involves influencing voltage (Vpcc) using a converter circuit (29), where the voltage like at a connection point (P) to which an energy generator or an energy consumer is attached. A series connection is designed from an induction coil (31) and a switch (32). The series connection is coupled with the connection point. The converter circuit is influenced such that the voltage is transferred to the connection point in a desired value and the switch is closed. A parallel circuit is designed from an induction coil and another switch.

The invention provides an electromachining method with controllable tool electrode rotating speed for micro-holes and a speed adjustment system, and belongs to the technical field of non-traditional machining. According to the electromachining method, neutral salt solution with the extremely low concentration serves as electrolyte, corresponding voltages are applied to two poles of the electrolyte, the gas film covering status of the surface of a tool electrode is adjusted through control over the tool electrode rotating speed, and if the tool electrode rotating speed is high, discharging reaction occurs when the gas film covering status meets the generation condition of the discharging reaction; if the tool electrode rotating speed is low, electrochemical reaction occurs; and controllable compounding of electrochemical machining and discharging machining is achieved through control over the tool electrode rotating speed. According to the electromachining method with the controllable tool electrode rotating speed for the micro-holes and the speed adjustment system, good surface machining quality and machining consistency can be achieved.

The invention discloses a horizontal type adjustable rubbing and scrubbing machine. The horizontal type adjustable rubbing and scrubbing machine comprises a machine frame, a reducer, a revolving shaft, a barrel body, a slag collection tank and a vibrating screen, wherein the reducer is arranged on the side wall of the machine frame, the revolving shaft transversely penetrates through the barrel body and is connected with the reducer, the barrel body is placed horizontally, the barrel body comprises a feeding section, a rubbing and scrubbing section and a discharging section, the slag collection tank is formed below the barrel body, and the vibrating screen is arranged below the slag collection tank. The horizontal type adjustable rubbing and scrubbing machine is suitable for rubbing and scrubbing waste plastic pieces, and the rubbing and scrubbing effects are significant.

The invention provides an efficient passive containment cooling system adopting a transmission device, when a break accident occurs, a heat exchange device is a core component used for achieving passive containment cooling, the heat exchange device is connected with an external water tank through an upper pipe section and a lower pipe section, and sprayed high-temperature steam is condensed on the outer surface of a heat exchange pipe. A collecting device is used for collecting a condensed coolant in a containment, and the upper section groove, the upper section drainage pipe and the reducing pipe can be used for collecting liquid condensed by the upper half part of the containment and the heat exchange device and are matched with the water bucket type transmission device to work. A coolant after acting and a coolant collected by a lower-section groove and a lower-section drainage pipe are sent to a pit to participate in reactor core cooling cycle. A water bucket type transmission device transmits kinetic energy of coolants in a pipeline to an impeller through a mechanical structure and conveys the kinetic energy to the position near the heat exchange device, and the heat exchange efficiency is improved in cooperation with fan blades blowing/sucking heat exchange pipes.

The invention discloses production equipment and a production method of melaleuca alternifolia leaf oil antibacterial wet tissues, and aims to solve the problems that non-woven fabrics are easily soaked unevenly in the production process of the antibacterial wet tissues and are easily folded in a soaking box to generate creases, so that the attractive effect of the wet tissues is influenced, the antibacterial effect of the wet tissues is reduced due to uneven soaking, and the overall quality of the wet tissues is influenced. According to the scheme, the production equipment comprises a soakingbox and a support, a box cover is connected to one side of the outer wall of the top of the soaking box through a hinge, a disturbance motor is fixed to the outer wall of the top of the box cover through screws, and a rotating shaft is fixed to the top end of an output shaft of the disturbance motor through screws. According to the production equipment, an upper clamping roller and a lower clamping roller at the left side and the right side rotate synchronously through a clamping roller motor, so that the wet tissues in a middle section are kept in a relatively soft state all the time, the non-woven fabrics cannot be folded to generate the creases, the soaking time of the non-woven fabrics is prolonged, the non-woven fabrics fully absorb antibacterial liquid, the attractive effect of thewet tissues is guaranteed, and the antibacterial effect and the overall quality of the wet tissues are improved.

The invention relates to a circulating fluidized bed boiler bed temperature event-driven control system based on state feedback. The event-driven control system comprises a circulating fluidized bed boiler, a data collection and storage device and a controller. The circulating fluidized bed boiler comprises a sensor and an actuator. The data collection and storage device is used for collecting and storing data related to bed temperature control of the circulating fluidized bed boiler. The controller is connected with the data collection and storage device and receives the data transmitted and collected by the data collection and storage device. According to the received data, the controller generates a primary air volume instruction and transmits the primary air volume instruction to the actuator in the circulating fluidized bed boiler so that the accuracy and the stationarity of primary air volume control can be achieved. According to the circulating fluidized bed boiler bed temperature event-driven control system based on the state feedback, on the basis that the bed temperature of the circulating fluidized bed boiler can be effectively adjusted, through reasonable parameter adjustment, the data communication traffic among the sensor, the controller and the actuator is decreased, and network information congestion is relieved.

The invention discloses a concentrated eight-treasure porridge slurry stirring and cooking pot which comprises a pot body, a motor, a reducer and a stirring shaft, wherein the stirring shaft is inserted into the pot body; the motor and the reducer drive the stirring shaft to rotate; a bottom sweeping stirrer, a multistage serial bottom jet stirrer, a two-way jet stirrer and a suspended bottom jet stirrer are sequentially arranged on the stirring shaft from bottom to top; the suspended bottom jet stirrer is limited by upper and lower positioning steps and can float up and down; a jacket is arranged outside the pot body and is connected with a steam valve, a drain valve and a direct discharging valve; the jacket is also connected with a water inlet valve and a water return pipe control valve; and the bottom of the pot body is communicated with a steam valve and a medium-pressure blower. The stirring and cooking pot disclosed by the invention has the characteristics that the energy consumption is low, each processing step of the eight-treasure porridge can be finished, the materials circulate well and are difficult to sink to the bottom, and even if material settling is caused due to long-term power failure, light-load startup can be realized. Moreover, the application prospects are wide.

The invention provides a disturbing device for conveying materials, a pneumatic conveying device with the disturbing device and a material conveying method. The disturbing device comprises a shell, and further comprises a disturbing part and a driving mechanism, wherein the shell is provided with a shell material inlet and a shell material outlet; the disturbing part is mounted in the shell; a material flowing passage is formed between the disturbing part and the inner wall of the shell; and the driving mechanism is used for driving the disturbing part to act so as to change flowing section area of the material flowing passage. Through the adoption of the material conveying device provided by the invention, blockage can be prevented and the materials can fall off uniformly.

The invention belongs to the technical field of oil production engineering. An acid and alkali resistant rapid mixing liquid application sample separation device, which comprises a feeding part, a mixing part and a liquid storage sample separation part; the feeding part is used for containing a solution to be mixed; the mixing part is arranged at the bottom of the feeding part and is used for uniformly mixing a to-be-mixed solution; the liquid storage and sample separation part is arranged at the bottom of the mixing part and is used for storing the mixed solution and sampling in groups. The invention further discloses an acid and alkali resistant rapid mixing liquid application sample separation method. The problems of acid-base solution mixing and sample separation can be solved, and static liquid mixing and sample separation are achieved through fluid mechanics. The static liquid mixing and sample separating device is reasonable in overall structural design, can be applied to strongacid or strong base or other liquid with the viscosity smaller than 200 mPa.s, is internally provided with no electronic driving assembly, and achieves static liquid mixing and sample separating by means of the hydromechanics principle.

The invention relates to the technical field of medical supplies, in particular to a wound healing protection device for surgical nursing. The wound healing protection device for surgical nursing comprises a protection shell, ventilation windows are formed in the two opposite side walls of the protection shell, and the ventilation windows are blocked through gauze; a ventilation mechanism is arranged in the protection shell and matched with the ventilation windows, and the ventilation mechanism is used for stirring air in the protection shell to form circulation; a quantitative dosing mechanism is fixed at the top end of the protection shell; a ring is used for being attached to the skin on the outer side of a wound and supporting the protection shell, and an adhesive tape is arranged on the outer side of the ring. The wound healing protection device for surgical nursing is scientific and reasonable in structural design, covers the outer side of a wound stably, and can flexibly achieve the purposes of improving the air permeability of the wound position and adding medicine regularly and quantitatively in the using process, so that wound healing is better promoted, the wound recovery period is shortened, and the workload of surgical nursing is reduced.

A tea processing equipment with a frying cavity and a drying cavity, comprising a processing shell, a dividing device is fixedly connected to the inner side wall of the processing shell, the inside of the processing shell on the upper side of the dividing device is a frying cavity, and the dividing device The interior of the processing shell on the lower side is a drying chamber; a frying device is arranged inside the frying chamber, and several heating blocks are fixedly connected to the inner wall of the frying chamber; a third rotating shaft is arranged in the drying chamber, and the third The bottom end of the rotating shaft extends downward through the processing housing, and the bottom end of the third rotating shaft is fixedly connected to the output shaft of the third motor located on the lower side of the processing housing, and several installation rods are uniformly and fixedly connected to the side wall of the third rotating shaft . The beneficial effect of the present invention is that the tea leaves falling into the disturbance cylinder will slowly fall from the drop hole, thereby realizing the disturbance and mixing of the tea leaves; at the same time, the disturbance rod at the bottom of the vertical rod disturbs the tea leaves at the bottom to make it The heat is even; the dividing device separates the tea leaves on the upper side from the tea leaves on the lower side.