59results about How to "Change cycle" patented technology

The invention provides a write-through lithography processing system and a lithography method. The photolithography processing system comprises a control system capable of using Fourier for calculating and an exposing system controlled by the control system to achieve repeated lithography. The lithography method enables a curved surface to be etched to be unfolded into Fourier polynomial according to a Fourier analysis principle, performs repeated lithography according to cosine functions in the polynomial, and achieves etching of a target curved surface after overlaying of repeated lithography. The write-through lithography processing system and the lithography method can etch any large-format three-dimensional curved surface and have the advantages of being high in design flexibility, etching efficiency and accuracy, low in cost and the like.

The invention provides a deep water well shed holothurians breeding method, and is characterized in that (1) fry stocking: the fry specification is 3-5cm, the stocking density in the prophase of the breeding is 40-60 heads per m2, and the fry is required to be sanitized before stocking; (2) breeding managing: a deep water well shed whose sea water temperature is 12-17 DEG C and whose salinity is not less than 25 per thousand is selected, slight flow raising method is adopted during the growth period, the daily flux is 1-3 times of the raising water, and air charging breeding is adopted when the water flows; sea mud, tail algae powder, and kelp power and auxiliary forage are fed 1-2 times every day, and the feeding amount is 1-5 percent of the weight of the holothurians. Taking full use of the establishment of the existing deep water well shed, breeding the holothurians effectively and healthily, the invention is easy to be operated and managed, and the invention can save energy and lower the consumption, can save water and reduce pollution, and can reduce the breeding period, as well as improve the breeding efficiency greatly.

The invention provides a multiplier enhancing method based on periodically poled lithium niobate, and belongs to the technical field of optical information processing. The method includes firstly, performing room temperature electric field polarization on lithium niobate crystals, changing the polarization direction of the electric domain in a negative domain region of the +Z face of the crystals, and performing vacuum coating sputter electrode on two Y-directional sides of the crystals; then irradiated the crystals with a normal light and applying voltage of the two Y-directional sides of the lithium niobate crystals through a high voltage source simultaneously, and realizing ordinary light multiplier enhancement through produced slow light effects. According to the method, the quasi-phase matching technique (QPM) is creatively combined with effective light power enhancement resulted from the slow light effects.

The invention relates to a phase shifting optical projection three-dimensional measuring system and method. A laser is generated by a single-mode laser device and is expanded into light beams through an optical beam expanding system. The light beams pass through a one-dimensional beam splitting grating and forms two light beams. The two light beams pass through an acousto-optic modulator and generate Bragg diffraction and are projected to a beam-combiner after angles are adjusted to form an interference light path. The interference light path passes through a focusing lens and is amplified by a projection object lens. Interference fringes are generated and projected to a measured object. The interference fringes projected on a surface of the measured object are captured by a CCD camera. The interference fringes are processed by a computer and finally a three-dimensional morphology of the measured object is recovered. The system combines an acousto-optic modulation technology with a phase shifting fringe frequency conversion technology, fast measures the three dimensional morphologies of the surfaces of the multiple objects with different structures on-machine, has the strong vibration resistance capability, realizes the on-machine measurement in a processing process, and especially has strong robustness for the object surface with the complex structure.

The invention relates to ruditapes philippinarum oligopeptide, the amino acid sequence of which is Asp-Trp-Pro-His. The invention discloses a preparation method of the oligopeptide. According to the preparation method, a target oligopeptide enzymatic hydrolysate is obtained through enzymatic hydrolysis of trypsin; and through ultrafiltration, anion exchange and reversed-phase high-performance liquid chromatography, separation and purification are further carried out to obtain the target oligopeptide. Meanwhile, the invention also discloses an application of the oligopeptide in resisting prostate cancer. Specifically, the oligopeptide can effectively inhibit cell growth of prostate cancer PC-3 and DU-145 cultured in vitro, induce apoptosis and change cell cycle. In comparison with the prior art, the preparation method of the ruditapes philippinarum oligopeptide has advantages of simple technological process, few impurity and high efficiency. Meanwhile, based on the prior art, the invention discloses effectiveness of the oligopeptide in resisting prostate cancer.

The invention belongs to the field of water and soil loss management and ecological environment restoration, and particularly relates to a technical method for projects, soil fertilizers, plants and agriculture and the like, which is a new water and soil loss management mode with very strong capability of water and soil conservation and ecological restoration and capability of organically combining a complete rainfall infiltration project with a simple and efficient soil fertility cultivation measure through distributing horizontal jumping ditches in a high-density way, centered on improvement of soil fertility for water and soil loss characteristics.

A method for balancing CO2 and CO2 equivalent materials in atmosphere is used for enabling CO2 and the CO2 equivalent materials in the atmosphere to keep dynamic balance through human intervention, thereby regulating the greenhouse effect and global climate change. The method adopts the following ways: (1) the energy efficiency of fuel is improved, energy is saved and carbon emission is reduced through scientific and technological innovation and equipment upgrading; (2) water and soil are used reasonably, and transformation of the water and the soil from carbon source to carbon sink is promoted; (3) plant carbon sink is increased by planting, clipping, processing and storing fast-growing carbon sink grass; (4) with adoption of the photosynthesis-based industrialized technology, the transformation speed of CO2 in the atmosphere into organic carbon compounds is increased; (5) the carbon cycle period is changed, and the decomposition speed and the decomposition amount of a photosynthetic product are controlled; (6) carbon sink product types are increased, and the quantity of carbon sink products is regulated; (7) carbon sink potential of deserts is developed; (8) the CO2 equivalent materials in the atmosphere are collected, transformed and used, and content of greenhouse gases in the atmosphere is reduced.

The invention relates to a viscous damper to passively adjust high energy consuming clearances, belonging to the technical field of engineering vibration reduction. The viscous damper comprises a piston rod, a cylinder head, a cylinder barrel and a piston head; a damping gap is formed between the piston head and the cylinder barrel to form a main fluid channel; an annular soft metal valve is arranged on the piston head, the gap between the annular soft metal valve and the cylinder barrel is formed to be a smallest gap through which the fluid passes; both sides of the piston head are provided with guide round disks. The viscous damper has the characteristics of stable damping force under the complex working condition, resistance of big impact load, simple structure and the like.

The invention belongs to the technical field of manufacturing of electro-catalysis materials and provides a stainless steel base water electrolysis catalytic electrode and a manufacturing method of the stainless steel base water electrolysis catalytic electrode. According to the stainless steel base water electrolysis catalytic electrode, a three-dimensional micron protrusion array is distributedon a stainless steel matrix. Micro-spheres of different sizes are distributed on the surface of the protrusion array at random. The surfaces of the micro-spheres are covered with oxide nanometer flossy structures formed by disordered stacking of nanometer particles. The manufacturing method of the stainless steel base water electrolysis catalytic electrode comprises the steps that firstly, high-energy-density pulse laser is utilized to conduct ablation on the surface of the stainless steel matrix so that the micron protrusion array can be formed; then, nanosecond pulse laser is utilized to conduct ablation on the surface of the protrusion array so that the micro-spheres and the nanometer flossy structures can be formed, and then the self-supporting electrolytic electrode without the need for an adhesion agent is obtained. The stainless steel base water electrolysis catalytic electrode has excellent water electrolysis hydrogen and oxygen evolution performance, overall water splitting performance and high stability; the manufacturing method is simple and controllable, large-area manufacturing can be achieved, raw materials are low in cost and easy to obtain, and the stainless steel base water electrolysis catalytic electrode can be used for wide application fields such as the field of hydrogen for fuel cell cars, the field of underwater equipment oxygen generation, the field of medical oxygen generation, the field of hydrogen water cups, the field of highland oxygen generation and the field of portable hydrogen and oxygen generating devices.

The invention discloses an aluminum electrolytic cell closed gas collecting device. At least two electrolytic chambers are formed inside an aluminum electrolytic cell through an anode and a cathode; the anode is a self-baking anode, and an anode paste discharging system is arranged above the anode; three groups of flue gas gathering pipelines are arranged on the aluminum electrolytic cell, the first-stage flue gas gathering pipeline directly communicates with an inner space of a cell body, the second-stage flue gas gathering pipeline extends to the position, above the anode, inside the cell body, and the third-stage flue gas gathering pipeline extends into the cell body and is in butt joint with an anode paste feeding port in the top of the self-baking anode through the anode paste discharging system; and the aluminum electrolytic cell is provided with a two layers of sealing structures including the outer sealing structure and the inner sealing structure. By means of the aluminum electrolytic cell closed gas collecting device, the centralized treatment and recovery of the exhaust gas and the waste heat generated by the aluminum electrolytic cell adopting the multiple continuous operation chambers are realized, the ultra-low controllable discharge of air pollutant in the electrolytic cell is realized, the heat preservation state of the electrolytic cell is improved, the heat loss of the electrolytic cell is reduced, and the energy efficiency level of the electrolytic cell is effectively increased.

The invention belongs to the teaching experiment equipment technology field and discloses a static acceleration demonstration instrument. The static acceleration demonstration instrument consists of an acceleration track, an object to be accelerated and a power supply. The acceleration track consists of an insulation pedestal, an insulation semispherical spherical surface, an insulation electrode support and a high voltage electrode. The object to be accelerated is a conductive macroscopic metal ball; the power supply adopts a DC high voltage power supply; in the experiment, the DC high voltage power supply enables all high voltage electrodes to be electrified; through the constant charging and discharging on the electrified ball on all electrodes, the electrified ball is accelerated while moving, which show the action on the electrified object by the electric field. The static acceleration demonstration instrument is small in volume, easy in carrying and operation, and good in stability, strong in interest and applicable to the demonstration in classroom and can perform macroscopy on the microprocess.

Disclosed is a Chinese medicinal composition for treating traumatic injury and bone fracture which comprises the following raw materials (by weight ratio): ground beetle 40-70g, native copper 10-20g, frankincense 10-40g, Chinese angelica root 50-80g, dragon's blood resin 30-60g, notoginseng 30-60g, dipsacus root 30-70g, borneol 5-10g, carbonized hair 10-40g, myrrh 10-40g, borax 10-40g, rhubarb horsetails 10-40g and banksia rose 10-40g.

The invention relates to a gas drying device, and particularly discloses an external circulation heating regeneration gas dryer with three-way valves. The dryer comprises a first adsorption / regeneration tower, a second adsorption / regeneration tower, a pre-filter and a post-filter, wherein inlets of the first adsorption / regeneration tower and the second adsorption / regeneration tower are communicated with two ports of the three-way valve A by inlet pipes; a third port of the three-way valve A is communicated with an outlet of the pre-filter by a pipeline; outlets of the first adsorption / regeneration tower and the second adsorption / regeneration tower are communicated with two ports of the three-way valve B by outlet pipes; a third port of the three-way valve B is communicated with an inlet of the post-filter by a pipeline; the three-way valve C is connected with the three-way valve B in parallel between the two outlet pipes; the post-filter is connected with a third port of the three-way valve C via a circulation fan and a heater in sequence; and the three-way valve D is connected with the three-way valve A in parallel between the two inlet pipes, and connected with the pre-filter via a cooler and a separator in sequence. According to the gas dryer, the continuous dehydration stability of the two towers is ensured.

The invention relates to the technical field of electrocommunication, in particular to a phase electric modulation antenna. The phase electric modulation antenna comprises a coaxial line interface, a wide band printing one-arm helical antenna body, an active controllable circuit and a dielectric substrate. The wide band printing one-arm helical antenna body is printed on the upper surface of the dielectric substrate, an inner conductor of the coaxial line interface is directly connected with an input port of the wide band printing one-arm helical antenna body through a penetrating hole in the dielectric substrate, an outer conductor of the coaxial line interface is connected with the ground, the active controllable circuit comprises an adjustable capacitor and a direct current biasing circuit, one end of the adjustable capacitor is connected to the tail end of the wide band printing one-arm helical antenna body, the other end of the adjustable capacitor is directly connected with the ground, and the direct current biasing circuit is connected to the two ends of the adjustable capacitor in parallel. The phase electric modulation antenna uses the mode of loading the adjustable capacitor to achieve continuous changing of phase characteristics of the phase electric modulation antenna by controlling continuous changing of an adjustable capacitance value. The phase electric modulation antenna is simple in structure, easy to achieve, low in cost and strong in operability, and solves the problem that the bandwidth is limited.

The invention discloses an early maturing culture method for southern sweet cherries, and belongs to the technical field of fruit tree cultivation. The method comprises the following steps: (1) selecting varieties and stocks; (2) building a greenhouse and covering with a film; (3) regulating and controlling temperature and humidity; (4) performing flower and fruit stage management; (5) performing fertilizer and water management; (6) performing disease and pest control. According to the method, early maturing culture is achieved through facilities, the sweet cherries can avoid harm of early spring low temperature, the growth and development and flowering and fruiting periods of the sweet cherries can be changed, and fruits are promoted to appear on the market in advance. Fruits of the same sweet cherry variety can be ripe in the first ten days of April and are 10-20 days earlier than fruits of common rain sheltering and shading cultivation, and economic benefits are greatly improved.

The invention provides an iridescent yarn. The iridescent yarn is produced by spinning two or more types of fibers with different colors in a mixing mode. The iridescent yarn is characterized in that the fibers with a same type are provided with one or more raindrop-like colors which are obtained by adopting spray dyeing to ensure that the fibers are subjected to local spotted coloring and local blank leaving. The production process of the iridescent yarn comprises the steps of (1) pre-treating: respectively performing refining and penetrating agent treatment on a fiber raw material; (2) performing reeling; (3) dyeing, namely, on a spraying device, dyeing the fiber with raindrop-like colors which are obtained through the local spotted coloring and the local blank leaving; (4) performing steam fixation; and (5) spinning, namely, spinning the two or more types of fibers with the different colors in the mixing mode to obtain the iridescent yarn, wherein at least one type of fibers are obtained by adopting the dyeing mode in the step (3). The iridescent yarn has an effect of alternately showing the different colors in a non-regular way, so that the colors have certain arbitrariness to satisfy personalities of customers.

The invention relates to an external ointment for treating herpes zoster. The herpes zoster is caused by abundant liver fire in the traditional Chinese medicinal science, there are many traditional Chinese medicinal medicines and western medicinal medicines for treating the herpes zoster, a sequela which is pain is left after the herpes zoster is healed by above medicines, and the ointment has the characteristics of short time for treating the herpes zoster and no left pain. The quick-acting detoxifcation herpes zoster eliminating ointment which is based on the traditional Chinese medicinal science to eliminate western medicinal symptoms adopts Gentiana scabra Bunge, Rhizoma Coptidis and Amur Corktree Bark to resist inflammation, resist viruses, reduce the capillary vessel permeability, decrease the tissue fluid exudation, promote phagecytes to remove antigens, inhibit antibodies, eliminate immune compounds and inhibit immune reactions, adopts radix bupleuri to be compatible with the Gentiana scabra Bunge to course the liver, benefit the bladder, clear heat and purge fire, adopts Boswellia carteri to be compatible with myrrh to invigorate the blood circulation, dispel stasis, resolve tetany, relieve pains, change local blood circulation and promote inflammation absorption, and adopts Chinese lobelia herb, gypsum and stalactite to clear heat and detoxify. The ointment is bitter and cold, can descend and sink, can lower fire, is successful in rapid anti-inflammation through concentrated medicine power, and enables no pains to be left.

The invention discloses a pseudo random sequence generation method for wireless sensor network nodes and an application method thereof, wherein the pseudo random sequence generation method for the wireless sensor network nodes comprises the following steps: step S101: inputting any prime number p and cardinal number R; step S102: setting an initial value of x to be the cardinal number R, initializing i to be 1, and initializing a random sequence S; step S103: setting an intermediate variable t, wherein t is equal to mod(x, p); step S104: assigning S(i), wherein S(i) is equal to floor(x / p); step S105: amending the value of x, wherein x is equal to t*R+S(i), amending the value of i, i is equal to i+1; step S106: judging whether the length of the random sequence S is equal to the length of the random sequence C, if so, carrying out the next step; if not, returning to the step S103: step S107: outputting the random sequence, S is equal to {S(1), S(2),..., S(i)}. New D-sequence generated by the method changes the limited cycle period of original (1 / p)RD-sequence so as to enlarge the sequence length; the method is more sensitive for disturbance, and has extremely good autocorrelation, cross correction and probability distribution characteristic.

The invention discloses an ultrasonic-assisted microstructure selective forming manufacturing device and method based on digital light. The double-sided polishing lithium niobate wafer is arranged onthe light transmission hole of the optical bracket; the at least one pair of interdigital transducers are orthogonally arranged around the wafer, the PDMS nitrogen protection shell is arranged above the transducers, the converging lens and the digital microprism chip are sequentially arranged under the light transmission hole, and the ultraviolet light source and the collimating lens are sequentially and obliquely arranged on the side surface of the optical bracket. The wafer is coated with photosensitive liquid, and the interdigital transducer is started to enable the standing wave field of the acoustic surface to be coupled into the photosensitive liquid to form a microstructure array; a nitrogen protection shell is placed, the nitrogen protection shell is input into a DMD mask, ultraviolet light is irradiated on the digital microprism chip for selective reflection after passing through the collimating lens, then sequentially penetrating through the converging lens and the wafer to be irradiated into the photosensitive liquid, and the photosensitive liquid in an exposure area is cured to obtain the microstructure array film in a specified shape. Digital selection of ultraviolet light is achieved, the control precision of a forming area is high, and the response speed is high.

The invention relates to a method for reducing phosphorus loss of a paddy field by utilizing periphyton. The method comprises the following steps: enabling the TOC content of paddy soil to be 3.0% orabove by adding rice straw; then performing rotary tillage and watering, standing for one day, and then transplanting seedlings; uniformly spraying a mixed solution of a microalgae biological fertilizer, auxin and water after the rice seedlings turn green, wherein the amount of the mixed solution is 20-25 kg / mu; observing the growth of the periphyton in a rice planting area regularly; supplementing the mixed solution according to the growth condition; after the rice is harvested, remaining straws on the lower portion; performing rotary tillage by using a rotary cultivator; and carrying out thenext round of planting. The method disclosed by the invention is simple to operate, easy to popularize in a large area, low in cost, free of extra occupation of cultivated land, capable of returningphosphorus immobilized by periphyton to soil in time, and capable of greatly reducing the application amount of phosphorus; and the periphyton provided by the invention also has carbon fixation and nitrogen fixation capabilities, and the organic matter content and the fertility of the soil are increased while the phosphorus loss is reduced.

A method of quench hardening that in order to reduce fluctuation of the cooling rate of coolant for treatment subject (S) and to inhibit fluctuations of carburized product quality and heat treatment strain, comprises agitating quenching oil (O) in oil bath (11) to thereby uniformalize the oil temperature, discontinuing the agitation, and immersing treatment subject (S) in the quenching oil (O) of the oil bath (11) wherein the treatment subject (S) is oscillated in the longitudinal and / or lateral direction with a cycle of 2 to 10 sec.

The invention relates to a recombinant bifidobacterium hRV-VP7 expression vector and the oral vaccine. The invention pertains to the field of genetic engineering. The technical problem to be solved is to construct a new bifidobacterium expression vector of hRV virus VP7 protein. The recombinant bifidobacterium hRV-VP7 expression vector of the invention is loaded with a virus protein VP7 coding gene sequence of a human group A rotavirus. The expression vector of the invention can be transfected into the bifidobacterium and can be further prepared into an hRV / VP7 transgenic bifidobacterium-hRV-VP7 recombinant vector oral live vaccine preparation after fermentation culture. The invention is mainly used for the prevention and adjuvant treatment of infantile diarrhea which is caused by human rotavirus, thus having great market prospect.

The invention relates to a production formula of a health beverage and overcomes the disadvantage that the raw material leaching rate is low as only a quenching process is adopted for producing a health wine. The production formula is characterized by the selection and proportioning of floral leaf and fruit raw materials of the health wine, and is also characterized in that saccharification fermentation and hot dipping reflow process are added on the basis of the quenching process. The health wine produced according to the production formula has become a popular beverage on tables of the public, has the efficacies of reducing blood fat, inhibiting obesity, improving blood circulation and promoting the metabolism of human bodies, and integrates dietary therapy, health care and nutrition.

The invention discloses a fresh air clean efficiency multiplication device which comprises a first air opening, a second air opening, a third air opening, a fourth air opening, a fifth air opening, a sixth air opening, first air valves and second air valves. The third air opening is communicated with the first air opening and the second air opening through a pipeline. The sixth air opening is communicated with the fourth air opening and the fifth air opening through a pipeline. When the first air opening and the third air opening are connected / disconnected through the first air valves, the second air opening and the third air opening are connected / disconnected through the first air valves. When the fourth air opening and the sixth air opening are connected / disconnected through the second air valves, the fifth air opening and the sixth air opening are connected / disconnected through the second air valves. Under the condition that outdoor air quality is extremely poor, indoor air treatment capacity can be improved, the number of cycles of indoor air can be doubled, and the indoor air purification effect is greatly improved. The invention further discloses a fresh air clean efficiency multiplication system.

The invention discloses a method for developing a management system of a program-controlled switch by using asp technology, belongs to the technical field of communication, and aims to provide a method for developing a management system of a program-controlled switch. The invention adopts the technical scheme that the method comprises the following steps: (1) establishing a server environment, installing a windows xp professional edition on a computer, and then installing IIS; (2) installing a plug-in on the server so that the IIS server supports a TCP / IP transmission protocol; (3) installing an ms sql server database or an access database on the server; (4) constructing a network platform, connecting the server and a client to a network switch at the same time, and distributing a corresponding ip address to the computer; (5) connecting the server and a management module of the program-controlled switch as well as the network switch; and (6) compiling a web program by using the asp technology, and deploying the web program on the server.

The invention discloses a vitamin B (VB) face cream cosmetic containing 24K gold. The VB face cream cosmetic comprises a phase A, a phase B and a phase C; metabolism of cells is promoted, aging cells are activated, the regeneration of cells is promoted, and a large quantity of fiber tissues on the skin are generated by virtue of an activity action of 24K gold at the same time; and epidermis, dermis and hypodermis are fixed, so that the skin is difficultly sagged because of the earth gravity or the age. Combined with the contained substances of mixtures of vitamins, green tea, pomegranate, seaweed, mushroom, glucosan and the like, the poor moisture function of the common face cream can be totally improved, and the disadvantages of dry skin, tense skin, rahagades and poor antioxidation are solved after the VB face cream cosmetic is used.

The invention discloses a speed changing cutter device for an absorbable object. The speed changing cutter device comprises a rotary cutter assembly, a speed changing assembly and a drive motor. The rotary cutter assembly comprises an anvil roller and a cutter roller. The speed changing assembly comprises at least two gear pairs. Each gear pair comprises at least one non-circular gear pair matched with a preset speed changing curve, and any one of the gear pairs on the speed changing assembly is correspondingly and detachably connected with the anvil roller and the cutter roller. Production of a plurality of series of products can be achieved by using one set of cutter device, only the position of a gear case needs to be adjusted during debugging, the equipment cost is saved, and the code changing time of the products is shortened. According to the speed changing cutter device, the confronted common fault that in the current industry, equipment code changing difficulty is large, the period is long and the cost is high is thoroughly changed, and the actual production requirement is met.

The invention relates to an ultrasonic beauty device for exfoliation, the beauty device includes an upper cover, a lower cover, an ultrasonic blade, a key switch, a PCB board, a battery and a power circuit decorative block, the upper cover and the lower cover A PCB board and a battery are arranged between the parts, one end of the PCB board is one end of the ultrasonic blade, the battery is also connected to the PCB board, a high-frequency transformer, a chip and a PCB board switch are arranged on the PCB board, and the upper A key switch is arranged on the top of the cover, and a decorative block of a power circuit is provided on the outer end between the upper cover and the lower cover on the opposite side of the ultrasonic blade to be detachably connected. The beauty device starts to exfoliate the human face through ultrasonic blades, and shovels a large amount of cuticles. The beauty device has scientific and reasonable design, simple structure, convenient use, and good exfoliation effect, which can meet the needs of users.

The invention relates to an electronically controlled polarization beam splitting device with an adjustable splitting ratio, and a splitting ratio control method. The electronically controlled polarization beam splitting device comprises a light transmission light path composed of a polarizer, an achromatic quarter-wave plate and a liquid crystal polarization grating which are arranged in sequence, and an external control voltage driving device connected with the liquid crystal polarization grating. The included angle between the polarizing direction of the polarizer and the fast axis of the achromatic quarter-wave plate is 45 DEG, the liquid crystal polarization grating can realize polarization beam splitting, and the external control voltage driving device can change the birefringence of the liquid crystal polarization grating to realize continuous change of the splitting ratio. According to the invention, polarization wave division of any broadband incident light beam can be realized, and the splitting ratio can be continuously, accurately and dynamically adjusted through external control voltage.

The invention discloses a fresh air clean efficiency multiplication device which comprises a first air opening, a second air opening, a third air opening, a fourth air opening, a fifth air opening, a sixth air opening, first air valves and second air valves. The third air opening is communicated with the first air opening and the second air opening through a pipeline. The sixth air opening is communicated with the fourth air opening and the fifth air opening through a pipeline. When the first air opening and the third air opening are connected / disconnected through the first air valves, the second air opening and the third air opening are connected / disconnected through the first air valves. When the fourth air opening and the sixth air opening are connected / disconnected through the second air valves, the fifth air opening and the sixth air opening are connected / disconnected through the second air valves. Under the condition that outdoor air quality is extremely poor, indoor air treatment capacity can be improved, the number of cycles of indoor air can be doubled, and the indoor air purification effect is greatly improved. The invention further discloses a fresh air clean efficiency multiplication system.