58results about How to "Improve land use efficiency" patented technology

The invention relates to a method for simplifying hybrid rice seed production procedure and improving the working efficiency of seed production. The method comprises the following steps: (1) breeding small grain CMS or GMS line and corresponding hybrid rice having characteristics of rice (Oryza sativa) ZH-sg (Zhonghua 11 small grain mutant) with the accession number of CGMCC No. 2741; (2) hybridizing the small grain CMS line with large grain or normal grain restorer line hybrid rice for seed producing; (3) carrying out mechanized seed production of mixing sowing and mixing harvesting by utilizing small grain CMS line hybrid rice; (4) seed cleaning and separation after mechanical harvest. The invention can save a large amount of seed production field, reduce the investment of labor force in seed production, simplify the operation procedure and reduce mechanical admixture, storage and transportation cost and buying cost of hybrid rice seeds for rice farmers.

The invention discloses a reconstruction and restoration method for a high-water-table and unsteady sunken coal-mining-induced subsidence shallow-water wetland ecosystem. The method includes: firstly, adding water to soil in an engineering area to be reconstructed to soak the soil and ensure the soil to be moist; secondly, selecting vallisneria as a main submerged plant, fully stirring vallisneria seeds and plant ash before the middle of March every year according to a proportion of 1:1, and then uniformly sowing the seeds in the whole engineering area according to the standard of 1kg of seeds per mu; thirdly, preparing emerged plant communities around the edge of the engineering area, and preparing floating plant communities and other submerged plant communities in the whole engineering area in patches. The ecological environment of restoring subsidence wetland by the aquatic plant communities is formed, ecological functions of lakes of the subsidence wetland are given into play, and land utilization efficiency of the subsidence wetland can be improved.

The invention provides an airbag core mold component cast hollow floor construction method, and belongs to the field of construction methods. The airbag core mold component cast hollow floor construction method comprises the following steps: I, erecting a support system; II, paving bottom tendons and rib tendons; III, mounting a fixing device, wherein the fixing device is used for fixing airbag core mold components; IV, paving the airbag core mold components, and fixing the airbag core mold components through the fixing device; V, paving surface-layer reinforcing steel ribs; VI, casting concrete. By adopting the construction method, the self weight of floors can be reduced, the construction cost can be lowered, and the utilization rate of lands can be increased.

The invention relates to a turn-over type roof system which comprises a roof portion, a horizontal supporting portion, a hydraulic portion and an electric control portion. A turn-over roof is arranged in the middle of the roof at one side. A turn-over roof board (5) is connected with a connecting rod (6) through a turn-over support (2). When the connecting rod (6) is driven by a hydraulic oil cylinder (7) to conduct extension movement, a rigidity framework structure is driven to conduct horizontal supporting movement, so that the turn-over support rotates and a roof is turned over. The hydraulic portion is provided with various hydraulic valves. The electric control portion is provided with a circuit protection module (29), a hydraulic system starting and stopping module (30), a turn-over roof opening and closing module (31) and a travel switch (32). Safe and reliable operation of the whole turn-over type roof system is guaranteed; the roof can be opened and closed in a turn-over mode; after the roof is turned over, a cowshed is directly lightened by light rays; the playground area needed by dairy cows for healthy growth is reduced, and the use rate of a land is improved.

The invention discloses a method for designing the surface soil covering thickness for coal gangue filling and reclamation in a coal mining subsidence area. The method comprises the following steps: a, investigating and analyzing lumpiness structure characteristics of filling and reclamation materials, namely coal gangues; b. designing the surface soil covering thickness according to the lumpiness structure characteristics of the coal gangues. The method has the advantages that the different influences of different coal gangue lumpiness structures on the surface soil covering thickness when the coal gangues are used for filling and reclamation can be disclosed, and the quantitative relation between the coal gangue lumpiness and the surface soil covering thickness can be given, so that certain guiding significance is provided for land reclamation engineering practice in the coal mining subsidence area; different surface soil covering thicknesses are designed according to differences of the coal gangue lumpiness structures, so that soils of the whole reclamation area have the same moisture and fertility preserving capability, and the unified management on fertilization, irrigation and the like can be facilitated; due to the reasonably designed surface soil covering thickness in the coal gangue filling and reclamation area, the mellow soil resources can be saved greatly, and meanwhile, the damage of other land resources caused by the taking of a large amount of soil can be avoided.

The invention relates to a vertical undercurrent artificial wetland system capable of reinforcing removal of total nitrogen without obstruction. The vertical undercurrent artificial wetland system is mainly composed of a filtration column, an upward flow wetland, a downward flow wetland, a sewage backflow apparatus and an aeration apparatus. The aeration apparatus is disposed at the bottom of the downward flow wetland, and effluent flows back to a water inlet of the upward flow wetland. The sewage is subjected to grille treatment. Firstly, the sewage is introduced to the filtration column so as to remove most of the suspended materials, and then is introduced to the upward flow wetland and the downward flow wetland. The upward flow wetland is an oxygen-deficient environment that is beneficial to a denitration reaction; due to the additionally arrangement of the aeration apparatus, the downward flow wetland is an aerobic environment that is beneficial to a nitration reaction; and the effluent from the downward flow wetland flows back to the water inlet of the upward flow wetland according to a proportion. The whole process combines a conventional A / O process and the artificial wetland and forms a novel process that is used for sewage treatment and is capable of efficiently removing the total nitrogen without obstruction. The system can efficiently reduce suspension concentration of intake water of the wetland, increases removal capacity of the total nitrogen of the artificial wetland, and has strong capacity of resisting impact load. The wetland has long service life.

The invention discloses a method for raising geese in a corn field. The method comprises the steps that firstly, corn is planted and goslings are prepared; the goslings are raised in the corn horn mouth stage at the end of June and certain feed is offered everyday in the stage; the goslings are raised in the corn field in the corn booting stage or the corn heading stage in the middle ten days of July; certain feed is offered so that growth of the goslings can be maintained and the feed is offered at night; geese are obtained in the corn milk ripe stage or the corn dough stage almost at the beginning of October and the corn is harvested ten days after the geese are obtained. According to the method for raising the geese in the corn field, corn cultivation and goose raising are organically combined and the cost benefits of the geese and life benefits of the corn are improved; the geese are obtained when the corn is mature, the goose raising time is prolonged, the difficulty of technology conduction is reduced, the yield of the corn is guaranteed, and the yield of the geese is increased as well. In addition, the production benefits, the land use efficiency, the light energy use efficiency, the production efficiency and the economic benefits are improved and the ecological benefits are good.

The invention discloses a double-row spaced planting method of corn inter-planting in corn field; the number of total rows of double-row spaced planting is more than the number of total rows of single-row planting by one time; the seedling is positioned in double rows by adopting an alternating method and the number of the left seedling is increased by 10 percent to 20 percent compared with the equal row spacing type. The double-row spaced planting method of the invention not only can improve the corn yield but also fully utilizes the illumination resource and utilizes the land resource reasonably.

The invention discloses a method for reducing the surface subsidence range of an underground mining area. The method comprises the following steps of 1, acquiring the position of an underground miningworking face, an advancing direction and speed of the working face and the surface subsidence influence range of the periphery of a projection area of the mining working face; predicting the surfacesubsidence range and time according to the advancing direction and speed of the working face, and dividing a tension area and a tension extrusion area in the potential subsidence range; 3, before thesurface subsidence time point, arranging a drill hole in a potential tension extrusion area and performing controlled blasting or directly digging a groove; and 4, repeating the steps after the surface subsidence time point of the stage arrives. According to the method, the principle of blasting or grooving the rock-soil body so as to destroy the structure of the rock-soil body and block the stress propagation is utilized, so that the tensile stress propagation effect formed from the mining subsidence center to the periphery is reduced, the subsidence range of the periphery of the mining areais reduced, the damage to the peripheral land and structures due to underground mining is reduced, and the danger degree of geological disasters of other mining areas is reduced.

The present invention discloses an adaptation method for an intensive layout of a park green land based on a space correlation quantification model. According to the method, under a condition of limited space resources, adaptation of an intensive layout of a park green land is analyzed and studied in a dynamic optimization process of an overall urban space structure, and application of the space correlation quantification model enables the layout adaptation process to be finer and more objective. An adaptation process not only rebalances a relationship between demand and supply of a recreation service in an urban space through space correlation structure adjustment, but also improves land utilization efficiency of the park green land through space correlation strength adjustment, and objectively from the perspective of the intensive layout of the park green land, promotes an intensive evolution of service objects thereof and even the overall urban space structure.

The invention discloses a rotary stereoscopic parking garage with multiple stalls and easiness for movement. The rotary stereoscopic parking garage is characterized by comprising a main body bearing support, wherein a rotary main body bracket is arranged on the main body bearing support and comprises two polygonal main body brackets; corresponding angles of the polygonal main body brackets are connected with a main shaft sleeve through polygonal bracket spokes; the two polygonal main body brackets are connected by a parking hanging rack main shaft; at least two parking hanging racks of which the bottoms are provided with parking platforms are arranged on the rotary main body bracket. The rotary stereoscopic parking garage disclosed by the invention is mainly used for open air and has the characteristics that the rotary stereoscopic parking garage is provided with multi-deformation stereoscopic rotating stalls as well as an automatic balancing system, a wind-resisting swing locking structure, a vehicle sliding resisting structure and a driving structure; the rotary stereoscopic parking garage is compact and safe in structure, easy for dismounting, mounting and moving, small in occupied area and high in utilization efficiency; after the stalls are combined into the parking garage, the auxiliary land is less; compared with a fixed parking garage, the rotary stereoscopic parking garage disclosed by the invention has the advantages that the construction cost is low, and parking garages can be set up for large-scale activities, and the like.

The invention discloses a stereoscopic cultivation facility and technology for panax notoginseng. The stereoscopic cultivation technology comprises the steps of building of a greenhouse, building of a stereoscopic cultivation seedbed, preparation of a culture substrate and planting management of the panax notoginseng; the greenhouse is a sloping roof greenhouse, and two layers of sunshade nets with the light transmittance of 30 percent are respectively laid at the periphery and the top of the greenhouse; by building the two-layer staggered stereoscopic seedbed, the cultivation space is fully utilized, the utilization efficiency of land is improved from traditional 77 percent to 128 percent, and the utilization rate is improved by over 50 percent. According to the stereoscopic cultivation facility and technology disclosed by the invention, the quality of the panax notoginseng is guaranteed, the utilization rate of the land is improved, the problem of continuous cropping obstacles is alleviated, seriously-insufficient investment on panax notoginseng plantation infrastructures caused by continuous change of panax notoginseng planting land and repeated investment of low-end facilities are avoided, and production management of a panax notoginseng base is enhanced.

The invention discloses a method for remotely sensing an RFID electronic boundary based on an olfaction algorithm. The invention aims to provide a method for remotely sensing an RFID electronic boundary based on an olfaction algorithm, which is provided with a technical system for solving the problems of traditional boundary points, positioning, manual CNSS / total station measurement boundary points, large-range village and town ownership information autonomous acquisition and processing, RID electronic boundary point equipment and a land ownership / current situation investigation robot through combination of artificial intelligence and surveying and mapping. The unmanned aerial vehicle investigation monitoring robot and electronic boundary point intelligent sensing are realized, and the popularization and application of the new technology and the new mode can improve the land use efficiency of rural land investigation and monitoring, and traditionally depends on a remote sensing technology or artificial photo shooting. The problems that in the prior art, the remote sensing technology is shot from the air, the artificial intelligence level is low, the ground ownership survey is lack of robot autonomous control, collection and processing theories and methods, the GNSS combined total station technology is mostly adopted, and the measurement process mostly depends on manpower and depends on an ownership survey online service platform are solved.

The invention discloses a method for planting submerged vegetation Vallisneria denseserrulata in a medium-subsidence wetland of a coal mining subsidence area. The method comprises steps of selecting proper Vallisneria denseserrulata seedlings and preserving the same as needed, planting the Vallisneria denseserrulata seedlings in a pre-processed engineering area in the medium-subsidence wetland ofa coal mining subsidence area in specific time and according to a certain interval and by corresponding seedling clips, monitoring ecological indexes of Vallisneria denseserrulata plant clusters in the engineering area after the plantation, and managing a water level during a growth period. With the plantation of highly-effective and primary producer submerged vegetation, an ecological service function of an aquatic ecological system in the medium-subsidence wetland, and utilization rate of the medium-subsidence wetland can be improved.

The invention discloses a construction scheme of a main structure of a sluice, and relates to the field of hydraulic engineering. According to the construction scheme of the main structure of the sluice, the processes of earthwork excavation and filling, stonework excavation, construction of demolition engineering, grouting construction, concrete and reinforced concrete engineering, stonework engineering, installation of metal structures and electrical equipment are adopted to conduct construction and building. According to the construction scheme of the main structure of the sluice, difficult building points of the sluice are fully considered, and the best construction order and mode are adopted to conduct building, so that the construction quality of the main body of the sluice can be effectively improved, the construction costs are reduced to the maximum degree, the maintenance and reinforcement costs are saved, the daily operation and maintenance costs and the like are reduced, the soil utilization value and the like are improved, and the utilization benefits of soil are increased.

The invention discloses a glass warehousing system and a control method thereof. The glass warehousing system comprises a warehousing cabinet, a portal frame, a glass taking and sending mechanism anda conveying platform. The warehousing cabinet is arranged on ground guide rails and moves relative to the ground guide rails. The ground guide rails are arranged parallel to the conveying platform. The portal frame is fixed to the position, between the ground guide rails and the conveying platform, on the ground. Lifting guide rails are arranged on the two sides of the interior of the portal frame, and a containing cavity used for being matched with the glass taking and sending mechanism is formed in the conveying platform. The two sides of one end of the glass taking and sending mechanism areconnected with the lifting guide rails, and the other end of the glass taking and conveying mechanism is suspended above the conveying platform or descends into the containing cavity along the lifting guide rails. By means of the glass warehousing system and the control method thereof, the occupied space of a glass edge polishing production line can be definitely reduced, the glass edge polishingefficiency is optimized, meanwhile, the labor proportion occupied by people in the edge polishing process is reduced, the labor cost is saved, and meanwhile the equipment service life is prolonged.

The invention belongs to a closed type traffic layout of a logistics park, belonging to layouts of an overall design of the logistics park. According to a technical scheme, logistics buildings and surrounding roads thereof are concentrated and laid out in the shape of a trave to form a complete and continuous large block; an outer-ring road going through in a clockwise direction is arranged at the periphery of the large block, the outer-ring road is a fast passage for dividing the inner part of the large block longitudinally and transversely to form a grid road and a grid block in the shape of a grid; the grid road is a two-way traffic road; the end head of the grid road is communicated with the outer-ring road; the grid passage is a slow passage; individual logistics buildings are laid out in the grid block. The closed type traffic layout of the logistics park not only can ensure smooth traffic and ordered operation in the logistics park, but also can keep efficient land utilization efficiency, so that the logistics park can be saturated, ordered, smooth and efficient.

The invention discloses a forage space layout and cultivation method for sheep. The method includes the steps of (1), the forage variety and method for slope cultivation, wherein the forage variety for slope cultivation is lespedeza pilosa, and the method for slope cultivation includes the steps of soil preparation and base fertilizer application, transplanting, field management and harvesting; (2), the forage variety and method for dry land cultivation, wherein soil is relatively fertile, fodder mulberries, high-protein fodder ramie, clovers and honeysuckles are planted, and a method for planting the mulberries in the northwestern Hunan, a method for planting the high-protein fodder ramie in the northwestern Hunan, a method for planting the clovers in the northwestern Hunan and a method for planting the honeysuckles in the northwestern Hunan are utilized; (3), the forage variety and method for paddy field cultivation, wherein the paddy field is low, the soil is fertile, perennial Pennisetum purpureum Schum cv.Guiminyin and perennial Gumu No.1 are planted, and a method for planting Pennisetum purpureum Schum cv.Guiminyin and a method for planting Gumu No.1 are utilized. The methodis simple, convenient to operate and capable of efficiently obtaining high forage yield and quantity. The method is easy to accept and use by mass farmers and farmer households.

The invention discloses a mobile agricultural greenhouse desertification control method, belongs to the field of desertification control, and solves the problem of how to effectively utilize the land occupation of a desert photovoltaic project to control desertification. The method comprises the following steps: building a solar photovoltaic power station on the desert; carrying out regional leveling treatment on the desertification control site to eliminate the hidden danger of moving a large dune; building an assembly type agricultural greenhouse on the site, carrying out soil improvement in the greenhouse, and planting crops in the greenhouse; after a period of time, after the plants grow to form a certain scale, disassembling the assembly type agricultural greenhouse, using the improved area as agricultural land, and planting forage grass or sand stabilization plants; and expanding the desertification control site to the deep part of the desert, and moving and building the assembled agricultural greenhouse to a new desertification control site, so that people enter and sand exit. According to the method, desert control is carried out in a photovoltaic and mobile agricultural greenhouse mode, the greenhouse is effectively and rapidly combined with an original erected solar photovoltaic module, and a large number of land resources occupied by a large-scale photovoltaic project are fully utilized.

The invention discloses a rapid seedling raising method by using hickory nut tree branches. The method comprises the following steps that in early spring from late February to early March, when sap isabout to flow, sturdy branches, younger than two-year-old, of a hickory nut tree are selected, a crescent-shaped notch is carved by a knife along a bud base part at the position 3-5 cm away from eachnutrient branch base, and a same notch is carved opposite to the notch; a bud in the same line with the original notch is selected from each branch upward at the interval of 2-3 buds, and 3-6 notchesare carved in the base and the opposite surface along each branch according to the same method. The notches are painted with a rooting agent, rooting matrixes are used for wrapping the notches, thenblack-white film is used for wrapping the matrixes, and the upper portion and the lower portion of the black-white film are fixed by self-locking nylon cable ties. After 45-60 days, the hickory nut tree branches are cut off along the bases, each notch is provided with a seedling with root, each branch is cultivated into 3-6 seedlings, the branches with roots are placed in prepared land, the self-locking nylon cable ties are cut off, the black-white film is taken down, and the hickory nut tree seedlings with the matrixes are planted in soil. The rapid seedling raising method has the advantagesof short seedling period, high seedling efficiency, high survival rate, easy process and low operational skill requirements, and is conveniently promoted to farmers and used by the farmers.

The invention discloses a multifunctional intelligent duck shed for cultivating meat ducks. The multifunctional intelligent duck shed comprises a duck shed chamber and is characterized in that duck cultivation unit areas which are distributed in left-right symmetry are arranged in the duck shed chamber, a personnel passageway is arranged between the duck cultivation unit areas, each duck cultivation unit area comprises duck cultivation grid layers which are vertically distributed, guardrails are arranged on the peripheries of the duck cultivation grid layers, driven rollers distributed in an equal-interval manner are arranged on the lower portion of each duck cultivation grid layer, two drive motors which are distributed vertically are mounted at the rear end of each duck cultivation grid layer, each drive motor is in linkage with a drive roller, duck manure collecting conveying belts are arranged on the drive rollers and the driven rollers, and each duck manure collecting conveying belt is located right below the corresponding duck cultivation grid layer. The multifunctional intelligent duck shed has the advantages that the duck shed is provided with four duck cultivation grid layers, a large number of meat ducks can be cultivated, automatic feed feeding, automatic duck manure removing and automatic water feeding can be achieved, and the duck shed is high in automation level and promising in application prospect.

The invention discloses an automatic dividing method of a city plot ratio, which comprises the following steps: utilizing an information-processing system taking a high performance computer as a core, taking geography data of a city downtown as model input data, taking city blocks as model process evaluation base maps, building a city plot ratio evaluation model, carrying out standardized revise through a Saaty method, determining the plot ratio numerical value of each block, and automatically outputting engineering drawings that can be directly used in the city overall planning through drawing equipment. The method overcomes the insufficiency that the subjectivity and the randomness exist when the city plot ratio division is carried out by utilizing the human brain intellectual activity to make a decision in a city construction project, and greatly improves the working efficiency.

Provided is a novel Chinese style sky villa. The novel Chinese style sky villa comprises a sky villa main body of a three-floor villa structure, the first floor and the second floor are each providedwith two households which are arranged in a mirror mode, and the third floor is provided with an independent household; a first-floor first southern yard and a first-floor second southern yard are arranged on the southern side of each household of the first floor of the sky villa main body respectively, and a layer of household door is arranged between the first-floor first southern yard and the first-floor second southern yard; a second-floor first northern yard, a second-floor second northern yard and a second-floor entering porch are arranged on the northern side of each household of the second floor of the sky villa main body, a third-floor entering garden is arranged on the side of the third floor of the sky villa main body, a stairway is arranged on the ground of a top plate of a first-floor parking garage on the northern side, the lower end of the stairway extends to a third-floor entering yard, and the upper end of the stairway extends to a third-floor entering garden. According to the novel Chinese style sky villa, the first floor and the second floor are both provided with independent entering modes and independent yards.

The invention discloses a large-span thin-film plastic greenhouse for year-round production of a Yangtze river basin region. The plastic greenhouse comprises a greenhouse framework, a thermal insulation system and a sunshade system; the greenhouse framework comprises inner stand columns and greenhouse arch frames supported by the inner stand columns; the positions, close to the top ends, of everytwo adjacent inner stand columns are connected through an arch frame longitudinal beam; each greenhouse arch frame comprises a space truss of a semi-arch-shaped structure and a plane truss of a semi-arch-shaped structure; the space trusses are symmetrically arranged on the east sides and the west sides of the inner stand columns to form greenhouse main arches; three plane trusses are arranged between every two adjacent space trusses to form a greenhouse auxiliary arch; the main arches and the auxiliary arches are connected in the south and north directions through arch frame longitudinal pullrods; the two sides of the tops of the greenhouse arch frames are provided with top ventilation openings, and the top ventilation openings are provided with ventilation windows adopting rail type window opening systems. According to the plastic greenhouse, the main truss structure and the auxiliary truss structure are adopted, so that the greenhouse structure is more stable, and the compression resistance is stronger; and a heat preservation quilt and a sunshade net are arranged above the greenhouse arch frame, so that heat preservation in winter and cooling in summer can be realized.

The invention discloses a reflective concentrating photovoltaic system based on phase change heat storage and radiation refrigeration, and belongs to the technical field of new energy utilization. The problems that the output power of a photovoltaic module is low and the cooling effect of a battery is poor under the concentrating photovoltaic condition due to the fact that the existing concentrating photovoltaic and radiation refrigeration combined utilization effect is not ideal are solved. The system comprises a concentrating photovoltaic device, a phase change heat absorption assembly, a radiation refrigeration coating and a supporting frame, wherein the concentrating photovoltaic device comprises a ground reflector, a Fresnel condenser and a photovoltaic cell, the ground reflector, the Fresnel condenser and the phase change heat absorption assembly are respectively installed on the supporting frame, the phase change heat absorption assembly is arranged in parallel to the Fresnel condenser, the photovoltaic cell is attached to the side surface, which faces the Fresnel condenser, of the phase change heat absorption assembly in parallel, sunlight is reflected to the Fresnel condenser through the ground reflector, and the photovoltaic cell is covered with condensation light spots formed by the Fresnel condenser.

The invention provides a Chinese style air courtyard structure. The Chinese style air courtyard structure comprises a southern unit type air courtyard positioned at the southern side of a road and a northern unit type air courtyard positioned at the northern side of the road, wherein each of the southern unit type air courtyard and the northern unit type air courtyard comprises at least one residence unit; each residence unit is of a three-storey residence structure; two independent units are respectively at each of the first storey and the second storey; the two units at each storey are in mirror image arrangement; one independent unit is at the third storey; each unit of the first storey of each residence unit is provided with an elevator and a first-storey southern yard; each unit of the second storey of each residence unit is provided with a second-storey southern yard; third-storey entry yards are respectively arranged at the lateral side of the second storey of the residence unitof the southern unit type air courtyard and the lateral side of the second storey of the residence unit of the northern unit type air courtyard; and users at each storey can independently use and manage respectively yards and terraces. The invention provides the Chinese style air courtyard structure which is formed by combining the southern unit and the northern unit and has the advantage that independent entry modes and independent yards are realized by first-storey and second-storey residences.

The invention provides an application method for wind-solar complementary construction and simultaneous grid-connected generation on the same piece of land. According to the technical content of improvement, a photovoltaic power station is planned and constructed by using space land between arranged fans in a large wind farm; a double split winding boosting transformer is used for a main transformer of a wind power and photovoltaic booster station, a high-voltage side is connected with a power grid, the capacity of a winding at the high-voltage side is shared by wind power and photovoltaic power, the capacities of two split windings on a low-voltage side are used for connection of the wind power and the photovoltaic power respectively and a wind power collecting circuit is isolated from a photovoltaic collecting circuit; and a dynamic reactive power compensation device is arranged on a high-voltage side bus of the booster station and the compensation principle is designed as a whole according to the common demands of the wind power and the photovoltaic power. According to the application method and device, the technical problems of complementary construction of the wind power and the photovoltaic power on the same piece of land and sharing of one set of grid-connected system are solved; the utilization rate of the land and power grid equipment is improved; the wind power is isolated from the photovoltaic power by the double split winding transformer; separate electricity measurement is achieved; short-circuit current is reduced; and the reliability of a grid-connected generation system is improved.

The invention relates to an oil-tea camellia dense-planting vigorous afforestation method which comprises the steps of planting land treatment, cutting seedling cultivation, planting afforestation, water and fertilizer management, shaping and pruning, pest control and the like. The oil-tea camellia dense-planting vigorous afforestation method can not only maintain water and soil, but also shorten the production period of traditional oil-tea camellia planting, greatly improve the oil-tea camellia yield, and improve the yield of oil-tea camellia. The method improves the land utilization efficiency, facilitates mechanical operation, saves the production cost, improves the economic benefits of camellia oleifera planting, and has a good promotion effect on the high-quality development of the camellia oleifera industry.

The invention relates to an uninterrupted electric power exchanger used for an alternating current power distribution system, and belongs to the technical field of a combination of electric power electronics and a power distribution technology. The uninterrupted electric power exchanger comprises a small-capacity VSC, a high-capacity VSC, an electronic switch and a controller, wherein the alternating current side of the small-capacity VSC is connected with a corresponding alternating current substation through an alternating current circuit breaker while the direct current side of the small-capacity VSC is connected with the direct current bus of the uninterrupted electric power exchanger; the alternating current side of the high-capacity VSC is connected with one end of the electronic switch while the direct current side of the high-capacity VSC is connected with the direct current bus of the uninterrupted electric power exchanger; the other end of the electronic switch is connected with the corresponding alternating current substation through the alternating current circuit breaker; and the controller is connected with the electronic switch, the small-capacity VSC and the high-capacity VSC separately through signal lines. By adoption of the electric power exchanger, the utilization efficiency of a single main transformer is improved, the total capacity of the voltage source convertor station is reduced, the overall loss of the system is lowered, the total investment amount of the equipment is reduced, and the more economic and reliable operation of the overall equipment is achieved.