46results about How to "Adjust the distribution" patented technology

The invention relates to the technical field of diffusion furnaces, in particular to a two-end gas intake device for a phosphorous diffusion furnace tube. The two-end gas intake device comprises two gas intake tubes extending in a furnace tube, wherein both ends of each gas intake tube are connected with a gas source; the same reaction gas is introduced into both ends of each gas intake tube; the gas intake rates of both ends can be adjusted by a valve; O2 is introduced into one gas intake tube, and POCl3 is introduced into the other gas intake tube; vent holes are uniformly distributed on the gas intake tubes; the venting direction of each vent hole is parallel to the surface of a silicon wafer; and different reaction gases are respectively introduced into the two gas intake tubes. The invention achieves the aims of adjusting gas distribution in the tubes and improving square resistance uniformity by simultaneously introducing the reaction gases from a furnace opening and a furnace tail.

The invention discloses a mixed rare earth sintered NdFeB permanent magnet. The mixed rare earth sintered NdFeB permanent magnet comprises a mixed rare earth main phase and an Re-Fe-B main phase. Theinvention further discloses a preparation method of the mixed rare earth sintered neodymium-iron-boron permanent magnet. According to the method, the double-main-phase technology is utilized, the mixed rare earth main phase and the Re-Fe-B main phase exist in the magnet, aging treatment is conducted on the two main phases from high temperature to low temperature in a targeted mode, distribution ofgrain boundary phases in the magnet and a microstructure are optimized, and the magnet has high coercive force.

The invention discloses a method for cultivating multiple varieties of camellia oleifera. The method comprises the following steps: (1) selecting mature camellia oleifera fruits with good quality, andscreening suitable seeds; (2) constructing a seedling raising bed on a seedling raising field, wherein the seedling raising bed is filled with stones or coarse sand; pretreating a seedling culture substrate, putting the seedling culture substrate into a non-woven fabric seedling culture device, and placing the seedling culture substrate in a seedling culture bed; sterilizing the seedling culturesubstrate one day before seedling culture; perforating seeding on the non-woven seedling raising device, pouring water after the seeding is completed; managing the seedlings according to conventionalmethods during a seedling raising process; (3) selecting afforestation sites suitable for planting, removing weeds and digging planting holes, and setting windbreak forest belts, operation channels and soil and water conservation projects; (4) selecting normal and healthy nursery stocks for transplanting and planting, and watering and permeating each nursery stock after planting; (5) managing aspects of shaping, trimming, weeding, fertilizing, pest control and the like; and (6) collecting and mixing different varieties of camellia oleifera pollen, and spraying with a sprayer or an unmanned aerial vehicle in the full blooming period.

The invention discloses a camellia oleifera seedling raising method. The camellia oleifera seedling raising method comprises the following steps of selecting mature camellia oleifera fruits, performing rinding, and screening seeds; mixing bagasse with yellow soil, peat soil and fulvic acid to obtain a mixture, adding two thirds of the mixture to diluted bacterial liquid, performing composting to obtain a waterlogged compost substrate, and performing carbonization treatment on the remaining mixture namely one third of the mixture to obtain carbonization materials; uniformly mixing the carbonization materials with the waterlogged compost substrate to obtain a seedling raising substrate; entirely performing hot pressing and shaping on the seedling raising substrate; loading seedbeds in a nonwoven seedling raising machine, performing drilling, sowing the camellia oleifera seeds in holes, performing covering with the seedling raising substrate, placing the nonwoven seedling raising machinein a seedling raising disc closely on a seedling raising field, reversing an operating passage, and after performing placing, performing thorough watering on the seedbed; and performing management onthe seedling raising period. The method can well adjust the ventilating situation, the moisture and nutrient distribution situation of the seedbed, and can meet nutrient requirements in the seedling raising process, and the survival rate is increased.

The invention discloses an under-forest water and fertilizer integrated block intelligent control planting method. The method comprises the following steps: S1, a low-hill ecological public welfare forest with the tree age of 20 years or older is selected; S2, a plurality of soil slopes are leveled in an under-forest open field in a layered mode, each soil slope is a block, and at least two kinds of commercial crops are planted in each block in a crossed mode; S3, a microbial organic liquid fertilizer is sprayed to the planted economic crops respectively by adopting a water and fertilizer integrated block intelligent control technology; and the microbial organic liquid fertilizer is prepared from the following raw materials: under-forest residues, soybean meal, egg shells, traditional Chinese medicine residues, tobacco residues, bagasse, a compound microbial agent, biogas slurry, selenomethionine and vitamin C magnesium phosphate. The space under the public welfare forest is fully utilized, various commercial crops are planted at the same time, block management is carried out, the unit yield per mu and quality are improved, and economic benefits are increased.

A full-automatic oyster breaking machining device comprises a cylinder body, the top surface of the cylinder body is provided with an opening, and the bottom surface of the cylinder body is provided with a plurality of discharging holes; the discharging holes all communicate with the interior of the cylinder body and uniformly distributed in the cylinder body; the bottom surface of the cylinder body is fixedly connected with the top surface of a conical shell, the top surface and the bottom surface of the conical shell are both provided with openings, and the discharging holes all communicatewith the interior of the conical shell; the area of the top surface of the conical shell is larger than that of the bottom surface of the conical shell; and the bottom surface of the conical shell isfixedly connected with the top surface of a strip-shaped box, the top surface and the bottom surface of the strip-shaped box are both provided with openings, and the strip-shaped box communicate withthe interior of the conical shell. According to the full-automatic oyster breaking machining device, oyster shells can be broken and pulverized into power in sequence, the oyster shell machining timeis shortened, the machining efficiency is improved, the moving range of the oyster shells is limited by a pressing block so that the situation that when conical pins move downwards, the oyster shellsare moved in a scattered mode and cannot be effectively broken can be avoided, in addition, the oyster shells are broken through the two working states of the conical pins, and compared with a traditional breaking mode, the full-automatic oyster breaking machining device is more uniform in breaking.

The invention discloses a water and fertilizer integrated diversified combined drip irrigation planting method under a low hill forest. The method comprises the following steps: S1, selecting a low hill ecological public welfare forest; S2, planting a vine at a position close to a tree root, wherein the vine of the crop grows along the trunk of the pine tree, leveling a plurality of soil slopes in the open field under the forest in a layered mode, and planting at least two other commercial crops on each soil slope in a crossed mode; and S3, adopting a water and fertilizer integrated diversified combined drip irrigation technology to drip a microbial organic liquid fertilizer to the planted economic crops, wherein the microbial organic liquid fertilizer is prepared from the following raw materials: under-forest residues, peanut meal, snail shells, tobacco residues, traditional Chinese medicine residues, molasses, a compound microbial agent, biogas slurry, rice washing water, plant ash and methylselenobutyric acid. The space under the public welfare forest is fully utilized for planting various commercial crops at the same time, the unit acre yield and quality are improved, and economic benefits are improved.

The invention discloses a method and device for analyzing database index rationality, and relates to the technical field of computers. A specific embodiment of the method comprises the steps of: obtaining a plurality of executable data manipulation statements; determining an execution plan related to each executable data manipulation statement; analyzing the execution plan, and determining indexesapplied to execute the executable data manipulation statements and the number of data lines scanned by the indexes; and analyzing the reasonability of the index according to the index and the data line number scanned by the index. According to the embodiment, an execution plan of a plurality of executable data manipulation statements is analyzed; an index applied by each executable data manipulation statement and a data line number scanned by the index are determined; according to each index and the number of data lines scanned by the index, data manipulation statements without indexes or with poor index effects can be actively discovered, so that the reasonability of the indexes can be analyzed, the index distribution is adjusted, and the retrieval and writing performances are balanced.

The invention discloses a rich-lean gas burner, and relates to the technical field of burners. The rich-lean burner comprises an inner shell and an outer shell; a lean side gas inlet, a rich side gasinlet, a gas mixing channel and rich side gas outlets are formed in the inner shell; the outer shell sleeves the outer side of the inner shell, and a through rich side mixing space is formed between the outer shell and the inner shell; the rich side gas inlet and the rich side gas outlets communicate with the rich side mixing space; a fire hole plate mounting section is arranged at the upper partof the inner shell; a fire hole plate assembly is arranged in the fire hole plate mounting section; a partition structure is arranged on the inner surface of the fire hole plate mounting section and enables a gap located in the upper part of the partition structure to become a non-flow region; the fire hole plate assembly comprises an inner fire hole plate and an outer fire hole plate; the inner fire hole plate is nested in the outer fire hole plate; the gas mixing channel, a gap located in the lower part of the partition structure and the fire hole plate assembly form a through lean side mixing space. The rich-lean gas burner has the advantages that through optimization design, better gas/air distribution effect can be achieved, and the adaptability of the burner can be improved.

The invention discloses a road watering device capable of automatically avoiding pedestrians, and relates to the technical field of road watering devices.The road watering device comprises a supporting plate, a telescopic adjusting assembly and a watering assembly, a water storage tank is fixed to the middle of the upper portion of the supporting plate, and hydraulic telescopic rods are installed on the two sides of the upper portion of the supporting plate; a mounting frame is fixed to the top end of the hydraulic telescopic rod, the telescopic adjusting assembly is arranged on one side of the mounting frame, and the telescopic adjusting assembly comprises an electric push rod, a push plate, a fixing plate and a telescopic frame. According to the road watering device capable of automatically avoiding the pedestrians, the two sides of a road can be watered at the same time through the watering assemblies on the two sides, the watering efficiency is improved, distribution of the watering nozzles can be adjusted through the telescopic adjusting assembly, the road watering device is suitable for road surfaces of different widths, watering dust falling and cooling can be conveniently conducted on the road through the watering nozzles, and the practicability is high. Pedestrians on the road can be recognized through the human body sensor, and therefore the pedestrians can be conveniently avoided during watering.