220 results about "Sand storm" patented technology

The invention discloses a seed for aerial seeding and a preparation method thereof. The seed for aerial seeding comprises the following components by weight percent: 25-98% of combined carrier material, 1-3% of plant seed and 0.1-2.0% of adhesion agent, wherein the combined carrier material comprises the following components by weight percent: 2-10% of moisturized water-retaining agent, 3-8% of modified starch, 5-30% of organic matter powder, 10-40% of inorganic matter powder, 1-5% of plant growth regulator and / or plant macroelement, secondary element and micronutrient, 1-15% of organic fertilizer or inorganic fertilizer, defined amount of water and 0.5-2.0% of bird and mouse repellent. According to the invention, the mode of vibration through a shaking screen or rolling through a roller and the like is adopted to carry out grain enlarging treatment, and the mode of extrusion through multiple dies or molding through rolling is adopted to prepare a grain-enlarged polygonal anchor-shaped seed for aerial seeding or a flat polygon seed with concave centres of two sides for aerial seeding, thereby being contributed to treating desert and sand storm.

The invention belongs to agricultural machinery, and in particular relates to a peanut film mulching planter which is suitable for semiarid region with frequent strong wind in spring. The peanut film mulching planter consists of a frame (35), a profiling wheel (39), an upper drawbar holder (29), a lower drawbar holder (32), an upper drawbar (30), a lower drawbar (33), a fertilizing ploughshare (38), a ditching ploughshare (43), seed boxes (16), seed metering devices (17), etc., and a hole puncher mechanism is fixed at the two sides of the center of the frame (35). The peanut film mulching planter is characterized in that the upper end of the frame of a hole puncher (12) is fixed with two groups of the seed boxes (16) and the seed metering devices (17), the lower end of the seed metering device (17) is connected with a front seed dropping tube (23) and a rear seed dropping tube (22). The peanut film mulching planter does not need to manually cut an opening on the film to bring the seedling out from the film, which saves labor; and the peanut film mulching planter has no strict requirement for the film, which is favorable for the peanut to utilize moisture, thus the peanut film mulching plant is in particular applicable to the peanut planting in the semiarid region with frequent sand storm.

The invention discloses a control method and system for an air conditioning unit and the air conditioning unit. The control method includes the steps that predicted meteorological parameters within the next n hours of an area where the air conditioning unit is located are obtained, and the predicted meteorological parameters at least comprise one or more of the dry-bulb temperature, the wet-bulb temperature, the haze index, the wind scale, the sand storm level and the ambient temperature; and operation parameters of the air conditioning unit within the next n hours are adjusted according to the predicted meteorological parameters, the operation parameters at least comprise one or more of a defrosting parameter, a fan starting mode, fresh air starting and high / low pressure saturation temperature ranges, and n is larger than 0. According to the technical scheme provided by the method and system, the meteorological parameters within the next n hours are obtained, the operation parameters of the air conditioning unit within the next n hours are adjusted according to the meteorological parameters, control over the air conditioning unit is combined with weather conditions of the area where the air conditioning unit is located, and therefore the operation parameters of the air conditioning unit are flexibly controlled, and the energy saving performance of the air conditioning unit is improved.

The invention relates to a leaf surface dust fall quantity testing method based on a hyperspectral technique. The method comprises the following steps: firstly, collecting healthy leaves with different leaf surface dust fall quantities, quickly testing spectral information of a single leaf, putting the leaf subjected to the spectral information testing into a room, acquiring leaf surface dust fall quantity data of the leaf by virtue of a leaf area instrument and an electronic scale, and determining a sensitive spectral band subjected to leaf surface dust fall by analyzing the correlation between hyperspectral information and the leaf surface dust fall quantity data; and carrying out modeling by virtue of the data of the sensitive spectral band subjected to the leaf surface dust fall, selecting a model with a minimal root-mean-square error and maximal errors between a determination coefficient and a predicted root-mean-square error and between a sample standard deviation and the predicted root-mean-square error, and predicting the leaf surface dust fall quantity of the model only by virtue of the hyperspectral information of the leaf. Compared with a traditional determination method, the leaf surface dust fall quantity testing method has the beneficial effects of reducing the tedious experimental steps of indoor leaf area testing, cleaning, weighing and the like, being simple, convenient and rapid, and meanwhile, providing references for monitoring of the sand storm strength and environment quality of a dust fall region by virtue of astronautic hyperspectral remote sensing.

The sand and dust storm detection method utilizes a hybrid design of a sand and dust storm detection system (SDSDS) having a wireless sensor network (WSN) and a satellite imaging system that detects sand and dust storm events of all types. A layered architecture of context-aware middleware is used. While the WSN provides real time data from the area of interest, near-real time METEOSAT MSG images are obtained from the METEOSAT web site.

The invention relates to a covering film preventing sand and virescence method, which is that laying reentrant plastic covering film preventing sand in sand trough wall, fully burying sand in the covering film so that one end of the covering film, with 30-50kg force per square meter, is fixed in sand, setting several of cuts on the covering film, planting herb applied in sand or shrub with economic value in cuts. The covering film is not oxidized for 10-30 years and low cost. It not only prevents sand flowing in explicit sand zone but also sand winding in intrinsic sand zone and sand weather forming. It is the efficiency means that widely and drastically curing soil desertification and sand moving.

The invention relates to the technical field of large railway engineering machinery, in particular to a sand removal engineering truck. A bogie is arranged at two ends of the lower portion, a sand sucking device is arranged in the middle of the lower portion, and a driver's cab I, a power room, a work room, an auxiliary room, a living room and a driver's cab II are sequentially arranged at the upper portion. A sand throwing machine is arranged in the work room, cleaning devices are arranged in front of wheels on the outer side of the bogie, and the sand sucking device, the sand throwing machine, a sand blowing device, a movable air duct, a hydraulic station and the cleaning devices form a sand removal system. Sand is thrown to regions located outside railways and appointed by users through two working processes of sand suction and sand blowing of the sand throwing machine. In addition, the sand removal engineering truck is provided with a self-walking system and an integrated control system, integrates self-walking and sand removal functions, can perform continuous and automatic removal operation on large-area accumulated and buried sand of railway lines, is a large sand removal engineering truck for a railway, can be used for daily sand removal and maintenance operations of the railway lines in windy and sandy regions and is especially suitable for quick sand removal and cleaning operation of large-area railways after sand storms.

The invention discloses a planting method for combine circular agriculture, which comprises the following steps of planting evergreen first high-bar trees and / or undershrub around cultivated fields of cash crop to form a sand storm protection zone for the cash crop; planting second high-bar trees at the periphery of the wind storm protection zone to form a hedgerow zone of the cash crop; and planting first insect pest prevention plants between the wind storm protection zone and the hedgerow zone to form a first insect pest prevention zone. The method provides appropriate growth environment for the cash crop by planting various trees and undershrub plants to respectively form the wind storm protection zone, the first insect pest prevention zone and the hedgerow zone, thereby preventing the cash crop from being damaged by sand and insect pests, reducing using amount of pesticide and improving quality of agricultural products.

The invention relates to a fresh air and return air collaborative air supply haze-preventing air conditioner system. The system comprises an air conditioner device and an automatic control device. The air conditioner device comprises a fresh air valve, a return air valve, an exhaust valve, a louvre blade wheel washing cleaning device and an electrostatic filter. The automatic control device comprises an exhaust pipeline, a fresh air pipeline and a return air pipeline. The exhaust pipeline and the fresh air pipeline communicate with a room. The fresh air pipeline enters the room and is then connected with an air conditioner indoor unit. The air conditioner indoor unit is connected with an air supply pipeline. The return air pipeline is connected with the air conditioner indoor unit. The fresh air valve is arranged on the fresh air pipeline on a front section of the air conditioner indoor unit in the room, the exhaust valve is arranged on the exhaust pipeline outside the room, and the return air valve is arranged on the return air pipeline. The fresh air and return air collaborative air supply haze-preventing air conditioner system can be used for temporarily isolating indoor air and outdoor dirty air under the condition of severe outdoor air such as haze and sand storm, the outdoor dirty air is prevented from entering the room through the air conditioner system, and therefore cleanliness of the indoor air is ensured.

A preparation for promoting growth of plant and controlling sandstorm comprises a sand fixing and preserving agent and a water preserving and absorbing agent; according to the weight percentage, the sand fixing and preserving agent comprises 1-5% of water-based adhesive, 1-6% of sodium silicate, 1-5% of calcium chloride, 1-15% of dibutyl mallow-6- sodium sulfonate, 0.1-2% of lignin sulfonic acid calcium (sodium), 0.01-1% of calcium sugar, 1-3% of multi-soluble polyvinyl alcohol, 1-8% of hydroxyethyl cellulose, 6-20% of multi-element compound fertilizer mixed plant fiber, 1-15% of waste newspaper and paper mill waste liquid and waste paper pulp (with the adjusted pH value of neutral), 1-5% of clay and the balance of water; according to the weight percentage, the water preserving and absorbing agent comprises 1-6% of water preserving agent, 5-10% of dibutyl mallow-6-sodium sulfonate, 1-2% of calcium chloride, 1-2% of multi-soluble polyvinyl alcohol, 1-6% of hydroxyethyl cellulose, 3-15% of multi-element compound fertilizer, 0.21-5% of urea, 1-3% of plant fiber, 1-10% of waste newspaper and paper mill waste liquid and waste paper pulp (with the adjusted pH value of neutral), 1-6% of clay and the balance of water. The preparation can fix and preserve the sands, enlarge the water content in the desert and promote the growth of the plant.

The invention relates to a soil modifier for sand storm hungry farmland, which belongs to the fertilizer production technical field. The modifier for sand storm hungry farmland is prepared by mixing grass carbon, dry pine needle, bentonite, natural zeolite, humus soil, decomposed farmyard manure, soil water-retaining agent, zinc sulfate and manganese sulfate. The application method is that 10000.0 kilograms modifier is applied to each hectare farmland. After using the modifier of the invention, the volume weight of soil is reduced by 4.3%, the soil hardness is reduced by 1.8%, the quick result K is increased by 10.4% and the organic matter content is increased by 16.1%. The invention provides the soil nutrition conditioning modifier capable for improving physicochemical property of the sand storm hungry farmland, and the nutrient element and the nutrient coordination substance required by plants are added, thereby the soil modifier of the invention has the effects of soil improvement, fertilizer efficiency enhancement and environmental protection.

The invention discloses a protective device for electrical equipment, and relates to the technical field of electrical equipment. The protective device comprises a fixed base, a row brush and a springroller shutter, the row brush can slide along lower guide columns arranged on the fixed base, and the spring roller shutter can slide along upper guide columns arranged on the fixed base. A solar panel is cleaned by the row brush arranged on the fixed base in which the solar panel is installed, so that the problem that the generating efficiency is affected due to the fact that the solar panel iscovered with sand, dust and accumulated snow in present is solved. By using the spring roller shutter to cover the solar panel, the problem that the surface of the solar panel is easily damaged by extreme weather such as hail and sand storm is solved. The solar panel is washed by rainwater collected through a water tank, the cleanliness of the surface of the solar panel is further guaranteed, andthe generating efficiency maintains to be maximized.

The invention discloses a method for planting or cultivating sea-buckthorn, particularly to a method for planting the sea-buckthorn in gobi of alpine regions, which comprises oil preparation and watering before the planting, irrigation, fertilizing, height determination, trimming and the like during the planting. Compared with the prior art, the sea-buckthorn cultivated through the method disclosed by the invention has the characteristics of high adaptability, excellent growth and development, developed root systems, more root nodules, thicker aerial stems and flourishing growth vigor, and has a survival rate more than 91% by experimental statistics, so the method is more suitable for being applied in alpine regions, particularly in areas similar to the gobi of the alpine regions of northern Sinkiang, and can promote the large-scale development of the sea-buckthorn planting industry. As the flourishing branches and leaves and huge root systems of the sea-buckthorn have multiple effects of keeping out the wind, stabilizing sands and protecting farmlands, the sea-buckthorn plays a positive role in reducing sand storms and improving the ecological environment of arid desert regions, provides sustainable resources for the northern desert regions, and promotes the development of provincial economy.

A sand storm level prediction method based on a Stacking integration strategy comprises the steps: taking a recurrent neural network R and a convolutional neural network C as a first-level classifier,inputting original weather sample data into the recurrent neural network R and the convolutional neural network C respectively, and obtaining corresponding first-level learning features; introducinga meta-classifier Q as a secondary classifier by utilizing a Stacking integration strategy, and combining the primary learning features to serve as the input of the secondary classifier; and taking the output of the secondary classifier as the finally predicted sand storm grade quantity. According to the invention, the time series data processing capability of the RNN and the high-dimensional feature extraction capability of the CNN are fused; the sand storm level prediction method has a wider prediction angle and better generalization ability, and the selection of a default activation function can improve the flexibility and generalization ability of the model, and a 1 * 1 convolution kernel replaces a full connection layer, and more features can be integrated, and better generalization performance is provided, and L2 regularization and Batch-are adopted; and the sand storm level prediction method has higher generalization performance. The generalization ability of the classifiers ofall levels and the prediction accuracy and precision of the whole classifier are improved through the Normalization or Dropout technology.

A sandstorm prediction method based on an improved Naive Bayesian-CNN multi-objective classification algorithm uses the "China's strong sandstorm sequence and its supporting dataset", the "China's strong sandstorm sequence and its supporting dataset" and the "China's terrestrial regional cloud map (IR1)" as the research objects. The method comprises the following steps of firstly considering the ground factors of sandstorm occurrence, using a naive Bayesian algorithm to analyze the meteorological data collected by the meteorological station, and establishing a sandstorm prediction model; secondly, considering that the atmospheric motion also affects the occurrence of sandstorms, using a convolutional neural network algorithm to analyze the infrared satellite cloud image and establish a sandstorm prediction model; and finally using a multi-objective algorithm to normalize the output probability of the two sandstorm prediction models. A sandstorm prediction method with strong expandability based on an improved Naive Bayesian-CNN multi-objective classification algorithm is disposed. The algorithm and the sandstorm prediction method provided by the invention comprehensively consider the influence of ground and atmospheric motion on the sandstorm occurrence, and are consistent with the characteristics of sandstorm occurrence.

The invention relates to a mode of arranging and building main, auxiliary and intercropping host forests for herba cistanches, namely shelter forests against wind and for fixing sand, and belongs to the field of forestry and ecological environment. The forests consist of a main host forest, an auxiliary host forest and an intercropping host forest. The main hosts of haloxylon ammondendrons are arranged in diamonds, wherein an included angle of each two opposite angles of each diamond are 60 degrees; the distance between each two opposite angular vertexes is the tree shadow length of a 2-meter haloxylon ammondendron during sunrise and sunset on the summer solstice in the lunar calendar; one haloxylon ammondendron is planted at each opposite angular vertex; every three adjacent haloxylon ammondendrons form an equilateral triangle; and every four haloxylon ammondendrons form a diamond. The auxiliary hosts of caragana and Chinese wolfberry are respectively planted on two opposite sides of each diamond; and no trees are planted on the other opposite sides. A 0.5-meter periphery of each main host of haloxylon ammondendron is a blank area. Intercropping hosts of nanophyton erinaceum and artemisia stelleriana are intercropped at the blank area of each two adjacent diamonds. Herba cistanche is planted at the roots of haloxylon ammondendrons. The mode has the effects of blocking off and filtering sand wind, reducing a wind speed, retaining sand storm and preventing the generation of cyclones. The mode can be used for effectively controlling desertization expansion, improving the ecological environment and developing a herba cistanches industry.

The invention relates to the technical field of agricultural planting, in particular to a formula of a medium for planting dendrobium officinale. The medium comprises an upper layer and a lower layer. Pine bark and pine sawdust with different diameters serve as main raw materials of the upper layer, and limestone serves as an auxiliary material. The lower layer is a cement layer underlaid with a sunshade net. Decomposed pine bark and disinfected limestone are mixed evenly at the ratio of 6:4 or 5:5 and then laid on the lower layer. The formula of the medium is environmentally friendly, low in cost and wide in material source; by adopting the formula of the medium for planting dendrobium officinale, higher water retentivity, supervenience and air permeability are achieved, material bases and sources of sand storms are reduced, and innovation of the formula of the medium for planting dendrobium officinale is achieved.

The environmental test chamber for wireless sensor networks includes a structural enclosure having peripheral walls. A dynamic topology builder is a hanging mechanism disposed in a ceiling portion of the structure and is used to suspend the wireless devices below the ceiling portion via a cable. A weather conditioning machine simulating environmental conditions is disposed in at least one of peripheral walls. A controller sends commands to control the suspension height of the wireless units and to control environmental parameters of the weather conditioning machine. This allows the test chamber to test the communication and networking aspects of the wireless sensor network devices in different environmental conditions, such as sand storms and different temperatures, and humidity levels, within a 3-D topology specified by the controller.

The invention relates to the technical field of monitoring of soil wind erosion and desertification, and discloses a sand sampler for monitoring soil wind erosion and desertification. The sand sampler comprises a bracket, a sand storm channel, a sand collecting barrel, a motor, a controller and a weighing sensor, wherein one end of the sand collecting barrel and the motor are coaxially connected with each other; the other end is arranged on the bracket in a rotatable manner; a sand collecting inlet is arranged on the barrel wall of the sand collecting barrel; a sand storm inlet and a sand storm outlet are respectively arranged at two ends of the sand storm channel; the sand storm outlet of the sand storm channel is arranged on the bracket; the sand storm outlet resists against the barrel wall of the sand collecting barrel; the weighing sensor is arranged on the bracket and below the sand collecting barrel; the controller is connected with the weighing sensor and the motor respectively; and the controller collects sand quantity data of the weighing sensor and transmits a control signal to the motor after carrying out data processing, so as to control the motor to drive the sand collecting barrel to load or unload the sand in a rotating manner. According to the sand sampler, the purpose that the sand collecting barrel continuously collects the sand in real time can be ensured, and energy-efficient automatic sand unloading and sand collecting are achieved.

The invention relates to a tying and placing method for a vertical sand barrier, which adopts a nonuniform structure, namely, the porosity or ventilation coefficients at the upper part and the lower part are different; the sand barrier is layered in the vertical direction; and the lower structure is compact, the middle structure is sparse, and the upper structure is ventilative. The high vertical structure tied and placed through adopting the method adapts to the vertical distribution of concentration of wind-drift sand, thereby not only effectively withholding the sand delivery of wind-drift sand, but also reducing the wind pressure on the sand barrier, reducing the breakage damage of wind power, meanwhile reducing the material consumption and sand-prevention cost; and the method provided by the invention can be applied in the mechanical sand-prevention engineering at all areas with sand storms.

The invention relates to the field of sand storm prevention and control, in particular to a road sand storm protection system suitable for an area of shifting sand and a construction method of the road sand storm protection system. The system comprises sand stopping fence groups, a sand fixing gridding group and a grass square group. The sand stopping fence groups comprise a first sand stopping fence group and a second sand stopping fence group; the first sand stopping fence group is positioned at slope toes of sand dunes on two sides of a road; and the second sand stopping fence groups are positioned at tops of slopes of sand dunes on two sides of the road. The sand fixing gridding group is laid from windward sides of the sand dunes to the tops of the slopes of the sand dunes. The grass square group is laid to feet of the sand dunes from the tops of slopes of leeward sides of the sand dunes; and the heights of the sand fixing gridding group and the grass square group are smaller thanthe heights of the sand stopping fence groups. By arrangement of the high sand stopping fence groups, sand substances can be stopped from entering the system, the sand fixing gridding group and the grass square group are arranged on the sand dunes, the sand substances of the sand dunes can be fixed effectively, and then a road and a roadbed in the system can be protected effectively.

The invention discloses a water collection and soil coverage sand brick for conservation of water and soil in deserts. A soil coverage sand brick is arranged inside a brick body; a water storage tank and a water collection funnel which are supported by a fixed bracket are arranged on the upper part of the brick body; the water storage tank is connected with the soil coverage sand brick through a water guide pipe; an insertion plate and pointed sand legs are arranged at the bottom of the brick body; the brick body is a rectangular cement sand frame with openings in the upper part and the lower part; a drop irrigation hole and bracket mounting holes are formed in the outer side of the brick body; a wrench slot is formed in the outer side; water collection holes and a water stopping trough are formed in the top of the water storage tank; a groove is formed in the bottom of the water storage tank; and a filter net and a water outlet hole are distributed at the bottom of the groove. The water collection and soil coverage sand brick can prevent strong wind and reduce sand storm as well as relieve or stop migration of drift sand; furthermore, by soil coverage of the sand brick, cold resistance and high temperature resistance green plants can be effectively planted, so that desertization can be fundamentally improved; and moreover, according to a temperature difference between day and night in the desert, fog water is collected and is directly dropped into the roots of the plants in the sand brick, so that the survival rate of the plants is increased, and the ecological environment of the desert can be improved.

The invention discloses a device for cooling and purifying a building. The device comprises a water tank, a water pump arranged inside the water tank, a main pipe connected with the water pump, a water branch pipe connected with the main pipe, a diversion pipe arranged on the branch pipe, and a plurality of nozzles arranged on the diversion pipe, wherein the distance H between two adjacent nozzles ranges from 1.5m to 4m, a water valve is arranged on the water branch pipe, a filter is arranged on the water branch pipe and positioned between the diversion pipe and the water valve, a filter screen is arranged in the periphery of the water pump, and a filter layer is arranged in the periphery of the filter screen and made of quartz sand. The device has reasonable design and good cooling effect, can reduce the use of air conditioners in summer and thereby realize energy conservation, environmental protection and indoor air quality improvement. The rain water is collected and filtered and then utilized as water source in the device, so that the device has low running cost and is suitable for extensive use. The device can spray water mist to clean the air surrounding the building in seriously polluted environment or bad weather such as sand storm.

The invention discloses a novel window capable of circulating air and preventing dust and pollutants from entering a room, and relates to the field of building. The novel window is characterized by comprising a movable cover plate, an arc sliding rod, a dustproof filter element and the like. The invention has the advantages that: the stainless steel movable cover plate on an air filtering ventilated window can be randomly adjusted up and down in the range of 5 to 90 degrees to be in opening, locking and closing states; when the novel window is opened at 15 degrees for ventilation, the effect of preventing wind, rain, snow, hail and sand storm dust is optimal; the novel window is safely operated by old people, women and older children; due to the design, ventilation can be performed at any time and the dust cannot enter the room in the four seasons; when the air filtering ventilated window is opened for ventilation in a bedroom at night particularly in autumn and winter, people cannot have a cold accordingly and can breathe fresh air when sleeping, and great benefit is brought to the heart and lung health of human bodies; and the novel window is suitable for building developers in every country in the world and has a wide prospect in the field of domestic and foreign building.

The invention discloses a method for planting artemisia desertorum in quick-sand or semi-fixed sand. The method comprises the steps of arranging a mechanical sand barrier in the quick-sand or the semi-fixed sand; sowing seeds of the artemisia desertorum in the mechanical sand barrier in a planting way of broadcast sowing or sowing in strips, and covering soil after sowing; after the artemisia desertorum is planted in the quick-sand or the semi-fixed sand, spraying chemical sand-fixation agent to fix the sand surface, and waiting the growth of the seeds of the artemisia desertorum. Compared with the prior art, the artemisia desertorum planted by the method is high in rate of survival, high in population density and vigorous in growth; furthermore, the quick-sand is effectively fixed, and the hazards of sand storms can be reduced.

The invention provides optical glass which comprises the following components in percentage by weight: 4-30% of P2O5, 0 to 20% of BaO, 10 to 45% of Nb2O5, 0 to 35% of Li < 2 > O + K < 2 > O + Na < 2 >O; wherein BaO / Nb2O5 ranges from 0 to 0.5. Through reasonable component design, the optical glass provided by the invention has expected refractive index and Abbe number, and also has a low refractive index temperature coefficient, thus bringing greater degree of freedom for correcting temperature drift of a prime lens; the optical glass has excellent chemical stability and crystallization resistance, the transmittance is not obviously reduced after long-term use, and the optical glass is very suitable for vehicle-mounted lenses, and is particularly suitable for imaging applications needing to bear severe working environments such as sand storm, muddy and sharp temperature change.

The invention discloses a multifunctional movable garage. The multifunctional movable garage comprises a garage body, a vertical column, a movable sun-shading cloth, a crossbeam, an elbow pipe and a foundation flange. The vertical column is arranged at the rear part of the garage body. The bottom of the vertical column is provided with the foundation flange. The upper part of the vertical column is combined with the lower part of the elbow pipe in a sleeved mode. The upper part of the elbow pipe is combined with the crossbeam in a sleeved mode and fixedly connected with the crossbeam through abolt. The crossbeam is of a segmented structure, and the segments are connected in a sleeved-combined mode. A vehicle body is sealed by the movable sun-shading cloth through a rotating mechanism or an enclosing mechanism or a lifting mechanism. According to the multifunctional movable garage, the vehicle body is sealed through the rotating mechanism or the enclosing mechanism or the lifting mechanism, the effects of preventing sand wind and the like in spring can be achieved, corrosion damage of the high temperature to a vehicle in summer can be prevented, the effect of preventing rain is further achieved, and the effects of preventing sand storm, hail and the like in autumn are achieved, and in addition, the effects of preventing snow and freezing in winter can further be achieved; the movable garage can further play the effects of preventing scratching, collision, fire, theft and the like, assembly, disassembly and maintenance are easy, the production cost is low, the occupied areais low, the cost is low, operation is easy, and the sealing property is good.

The invention discloses a PVDF (Polyvinylidene Fluoride) / PVA (Polyvinyl Acetate) / nanometer SiO2 composite membrane. PVA, PVDF and nanometer SiO2 are co-mixed to form the film, so that the mechanical strength and the ageing resistance of the membrane are improved; the composite membrane is provided with good strain resistance, flame resistance and low smoke; and in particular, the ageing of the membrane is delayed by virtue of the aging resistance under ultraviolet radiation. The PVDF (Polyvinylidene Fluoride) / PVA (Polyvinyl Acetate) / nanometer SiO2 composite membrane can be used as a solar cell back membrane with excellent performances, so that bad environments such as sand storms, hails and the like can be resisted.