80results about How to "Small decline" patented technology

The invention discloses a quick charging system for an unmanned aerial vehicle and a charging method thereof, wherein the quick charging system and the charging method belong to the field of unmanned aerial vehicle charging. The quick charging system for the unmanned aerial vehicle comprises a supporting module, a positioning module and a charging module. The supporting module is used for assisting the unmanned aerial vehicle body in landing and supporting the unmanned aerial vehicle body. The positioning module is used for performing return positioning on the unmanned aerial vehicle body so that the unmanned aerial vehicle body lands on the supporting module. The charging module is used for controlling a charging process. The charging method according to the quick charging system comprises an unmanned aerial vehicle body returning step, an image acquiring and positioning step, a quick landing step, a charging step, etc. The charging process comprises three periods, namely pre-charging, multi-step constant-current charging and pulse charging. According to the quick charging system, the supporting module is combined with other modules for forming a complete charging system, so that the unmanned aerial vehicle body can accurately and quickly land on the supporting module, thereby greatly improving charging efficiency and realizing high autonomy and convenient use.

The invention relates to a non-woven fabric, and a preparation method and application thereof. The preparation method comprises the following steps of using oxidized graphene as ultraviolet absorption packing; uniformly mixing the oxidized graphene and zinc oxide nano coating in water; coating two sides of a non-woven fabric by using the mixture; and drying and molding to obtain the non-woven fabric. Average transmittance of the non-woven fabric in a long-wave ultraviolet region is lower than 3%; the decrease amplitude of the transmittance of the non-woven fabric in a visible light region is smaller than the decrease amplitude of the transmittance of a pure non-woven fabric in the visible light region by 30%-50%; the non-woven fabric is good in anti-ultraviolet property, and is washable; properties of the non-woven fabric can still be maintained even if the non-woven fabric is violently stirred in water for 30 days; and moreover, the non-woven fabric has characteristics of good conductivity, anti-static property, light color and environmental protection, and can be used in fields of ultraviolet protective clothing, anti-ultraviolet screen windows, anti-ultraviolet tarpaulin and anti-static clothes.

The invention discloses an air foam slug flow driving process for the oil recovery of an oil field, comprising the following steps of: 1 determining type and proportion of the used foam liquid, slug volume ratio and on-site injection manner of the used air and the foam liquid during the air foam slug flow driving by an indoor test; and 2 carrying out the air foam liquid slug flow driving on site,wherein the oil flow driving process comprises the following steps of: preparation before the oil flow driving; slugging a pad fluid; slugging the air foam; alternatively injecting the air and foam liquid slug from a specially manufactured device to a target well for many times; and continuously carrying out the oil flow driving on the target well by a water or air injection method according to the dynamic change condition of the target well and a conventional oil displacement method after the injection of the air foam slug is finished. The invention has the advantages of reasonable design, simple and convenient construction steps, good use effect and convenience of realizing, can effectively solve various practical problems of poor water injection effect, difficult improvement on the water injection capability, poor oil flow driving efficiency and the like during the ultralow reservoir waterflooding.

The invention provides a video transmission method, device and system, equipment and a storage medium, and the method comprises the steps: segmenting a to-be-transmitted target image frame in a targetvideo into a plurality of regions with different priorities; obtaining a currently predicted bandwidth as a target bandwidth; when the target bandwidth is smaller than the maximum bandwidth, allocating a corresponding target code rate to each region according to the target bandwidth, the priority of each region and the maximum code rate corresponding to each region; and performing compressed encoding on the corresponding regions according to the target code rates corresponding to the regions, and sending compressed encoding results of the regions to receiving end equipment. According to the video transmission method provided by the invention, when the network becomes poor, it can be ensured that the important region in the target image frame has good video quality, and it can also be ensured that the target image frame can be transmitted to the receiving end device quickly and smoothly with low delay.

The invention discloses a display panel and a display device. The display panel comprises a substrate, a cathode signal line, an insulating layer, an organic functional layer and a cathode layer, wherein the cathode signal line, the insulating layer, the organic functional layer and the cathode layer are sequentially stacked on the substrate; the cathode signal line is arranged around the displayarea, the organic functional layer is at least located in the display area, and the cathode layer is arranged on the whole surface; the cathode signal line and the organic functional layer have non-overlapping areas, the insulating layer has a hollow structure in the non-overlapping areas, and the cathode signal line is electrically connected with the cathode layer through the hollow structure. Acathode signal line which is arranged on a different layer from a cathode layer, is electrically connected with the cathode layer and surrounds a display area is arranged; the contact area of the cathode signal line and the cathode layer is increased; the equivalent resistance at the joint of the cathode signal line and the cathode layer is reduced, so that the drop amplitude of the cathode voltage at the position far away from the signal source is reduced, the cathode signal is input into the cathode layer through the cathode signal line, the resistance voltage drop on the cathode layer is reduced, and the display uniformity of the display panel is improved.

The present invention provides a method of inhibiting 220kV side bus single-phase short circuit current of 500kV pivotal substation. An electric grid adopting mass autotransformers makes the more 220kV side bus single-phase short circuit current of 500kV pivotal substations larger than the three-phase short circuit current, and exceeding the rated breaking ability of the circuit breaker. Considering change the autotransformer to non-autotransformer to reduce the single-phase short circuit current, reducing the grounding branch of the zero-sequence grid essentially. According to the sequence diagrams principle analyse, changing autotransformer to the non-autotransformer in 500 kV substation has a larger impact to the 220kV bus single-phase short circuit current of the 500kV pivotal substation than changing the autotransformer to the non-autotransformer in the 220 kV substation, the practical example also proves the accuracy of the theoretical analysis. The method provides technical support for the limiting the grid single-phase short circuit current, enhancing the credibility of the grid operation.

An R-T-B based rare earth permanent magnet is expressed by formula: (R1_1-x(Y_1-y-z Ce_y La_z)_x)_aT_bB_cM_d in which, R1 is one or more kinds of rare earth element not including Y, Ce and La. “T” is one or more kinds of transition metal, and includes Fe or Fe and Co as an essential component, “M” is an element having Ga or Ga and one or more of Sn, Bi and Si, 0.4≦x≦0.7, 0.00≦y+z≦0.20, 0.16≦a/b≦0.28, 0.050≦c/b≦0.070, 0.005≦d/b≦0.028, 0.25≦(a-2c)/(b-14c)≦2.00 and 0.025≦d/(b-14c)≦0.500. The magnet has a structure having a main phase, having a compound having a R₂T₁₄B type tetragonal structure, and a grain boundary phase, on an arbitrary cross sectional area, an area ratio of R-T-M, T-rich and R-rich phases, with respect to a total grain boundary phase area is 10.0% or more, 60.0% or less and 70.0% or less, respectively, and the coating rate of the grain boundary phase is 70.0% or more.

The invention relates to the technical field of magnetic materials, in particular to a preparation method of high-performance heavy rare earth Nd-Fe-B magnet, comprising the following steps: (1) placing RTM alloy powder and Nd-Fe-B blank in a vacuum rotary furnace for pre-penetration treatment to obtain a semi-finished Nd-Fe-B product with an RTM alloy powder layer adhered on the surface; (2) high-performance heavy rare earth NdFeB magnet is obtained by high-temperature diffusion and heat treatment of NdFeB semi-finished product. As that heavy rare earth is diffuse at the grain boundary of theneodymium iron boron magnet, the intrinsic coercivity of the neodymium iron boron magnet is remarkably improved, the consumption quantity of the heavy rare earth element is obviously reduced, and thereduction range of the original remanence and the maximum magnetic energy product of the neodymium iron boron magnet is greatly reduced.

The invention discloses a full-automatic continuous adjustable extractor hood adopting a capacitance-type sensor. The full-automatic continuous adjustable extractor hood comprises an extractor hood shell, and a capacitance-type sensor, a fan and a speed control circuit which are arranged in the extractor hood shell, wherein the capacitance-type sensor comprises a body base which is internally provided with a first cavity and a second cavity, and a sensor shell matched with the body base; the bottoms of the first cavity and the second cavity are communicated, liquid insulating media are filled inside the first cavity and the second cavity; the height of the first cavity is more than that of the second cavity, the liquid level sectional area of the liquid insulating media is less than that of the second cavity; the first cavity is communicated with atmosphere through an atmosphere inlet in the top, two parallel opposite electrode plates are arranged inside the first cavity along a height direction; the second cavity is communicated with a public flue through a flue gas inlet in the top; and the electrode plates are used as output ends of the capacitance-type sensor and connected with the input end of the speed control circuit, the output end of the speed control circuit is connected with a motor, and the output end of the fan is communicated with the public flue.

The invention discloses a highly-efficient flow control sieve tube. The sieve tube comprises a parent tube, wherein the parent tube is provided with a parent tube inlet; a filtering sleeve is sleeved outside the parent tube; a circumferential seam between the parent tube and the filtering sleeve is a flow deflecting layer; and the sieve tube is provided with a flow control device of which an inlet is communicated with the flow deflecting layer, while an outlet is communicated with the parent tube inlet. Under the condition of the relatively greater viscosity ratio of oil water, the sieve tube of the invention is cased off so that water yield is greatly reduced and oil production is slightly reduced. Before the surface of the oil water reaches the sieve tube, the flow velocities of a fluid at each position along a production section are substantially the same, which plays a role in controlling the uniform advancing of the oil water and delaying water breakthrough time.

The invention discloses a video data decoding method and device, and the method comprises the steps: simulating the original pixel information corresponding to a current image block through employingthe spatial neighborhood pixel information of the current image block, so as to estimate the characteristics of a background region where the current image block is located. comprehensively considering the spatial neighborhood pixel information and a quantized adjustment factor adjustment parameter decoded from a code stream; adaptively deriving a second quantization adjustment factor for the current image block, and the inverse quantization process of the first transformation coefficient set corresponding to the current image block is adjusted based on the adaptively derived second quantization adjustment factor, so that the inverse quantization processing is flexibly adjusted while the stripe code rate is stabilized in the video decoding process, the quantization distortion intensity better conforms to the visual perception of human eyes, and the coding and decoding performance is improved.

The invention discloses an Al-TiC composite film and a preparation process thereof. The Al-TiC composite film is prepared from 0.1 at.%-11 at.% of TiC and the balance Al, and a double-ultra supersaturated solid solution has displacement solid solution and interstitial solid solution characteristics. The preparation process of the Al-TiC composite film includes the steps of magnetron sputtering andannealing treatment. The step of magnetron sputtering includes the procedures that the surface of a stainless steel substrate is pre-treated, the stainless steel substrate is subjected to argon plasma sputtering cleaning, and the Al-TiC composite film is vapor-deposited on the surface of the stainless steel substrate. According to annealing treatment, vacuum annealing is carried out at the temperature of 250 DEG C. The Al-TiC composite film is high in strength and hardness, good in high-temperature stability and high in production efficiency, and can be used for coating materials of specificparts.

The invention discloses a catalytic cracking assistant for increasing the yield of propylene. Based on the total weight of the assistant, the assistant comprises 20-60% of HZSM-5 molecular sieve, 5-25% of phosphorus/aluminum oxide, 6-12% of silica-alumina gel carrier and the balance of kaolin, wherein the SiO2/Al2O3 mol ratio of the HZSM-5 molecular sieve is (25-500):1; the phosphorus/aluminum oxide is aluminum phosphate; and the silica-alumina gel carrier is silica-alumina gel. The catalytic cracking assistant disclosed by the invention is used in the catalytic cracking process of petroleum hydrocarbon; and the yield of propylene is increased, the octane number of gasoline is increased, and the loss of the main product catalytic gasoline component can be obviously reduced.

The invention belongs to the technical field of steel structure buildings, and particularly relates to an integrated floor slab. The integrated floor slab comprises a first floor slab body, a second floor slab body, installation plates and a damping and sound attenuation mechanism; the installation plate is fixedly connected to the lower surface of the first floor slab body; the installation plateis fixedly connected to the upper surface of the second floor slab body; the damping and sound attenuation mechanism is arranged between the installation plates; the damping and sound attenuation mechanism comprises a flexible metal plate, sound insulation cotton, sliding slots and sliding blocks; the flexible metal plate is in a wave shape and arranged between the installation plates, the interior of the flexible metal plate is uniformly filled with the sound insulation cotton, and the sliding blocks are fixedly connected to the wave-shaped convex positions of the flexible metal plate; the sliding blocks are slidably connected into the sliding slots; and the sliding slots are uniformly formed in the inner walls of the installation plates in a staggered mode. The integrated floor slab ismainly used for solving the problems that foot fatigue of dance practicing personnel is prone to being caused by floor slabs of the prior art, a base plate is greatly damaged, and meanwhile, work of other companies is affected by poor sound insulation effect.

The invention discloses a tension-compression loading-type mild steel damper with a replaceable function. A middle vertical board is fixed at the bottom of an upper end board. A left-side vertical board and a right-side vertical board are fixed on a lower end board. A gap is kept between the lower end of the middle vertical board and the lower end board. A gap is kept between the upper end of theleft side vertical board and the upper end board. A gap is kept between the upper end of the right-side vertical board and the upper end board. One end of a first flange and one end of a third flangeare fixed onto the left side vertical board. The other end of the first flange and the other end of the third flange are both fixed onto the middle vertical board. One end of a second flange and one end of a fourth flange are both fixed onto a right side vertical board. The other end of the second flange and the other end of the fourth flange are both fixed onto the middle vertical board. A firstwave-shaped web board is fixed in a space enclosed by the first flange, the third flange, the left side vertical board and the middle vertical board. A second wave-shaped web board is fixed in a spaceenclosed by a second flange, the fourth flange, the right side vertical board and the middle vertical board. The damper can be placed in a main body structure which undergoes plastic deformation in axial direction.

The invention belongs to the field of paper preparation, and relates to a paper preparation method using modified calcium carbonate as filler. The method includes the following steps that 1, after paper pulp raw materials are placed in water of 90-95 DEG C for soaking for 1.5-3 hours, and a coupling agent is added for beating; 2, light calcium carbonate is prepared into calcium carbonate suspension with the concentration of 40-55%; 3, cationic starch is prepared into starch suspension with the concentration of 50-65%, and then gelatinization is conducted for 20-30 min; 4, the pH value of the gelatinized starch solution is regulated to 8-10, a sodium stearate solution with the concentration of 10-15% is added, and a composite is formed; 5, the composite is added in the calcium carbonate suspension, a dispersant is added, precipitates are obtained, and the precipitates are mixed and stirred for 40-50 min at 75-85 DEG C and 250-300 r/min. By means of the method, the strength of paper can be improved, the smoothness of paper is increased, and the printing performance of paper is improved.

The invention discloses triazolone water dispersible granules capable of increasing heat storage suspension rate and stability and a production method. The triazolone water dispersible granules are prepared from the following components in parts by weight: 5 parts of triazolone, 0.1 to 1 part of a wetting agent, 0.1 to 2 parts of a dispersing agent A, 0.1 to 5 parts of a dispersing agent B, 0.1 to 4 parts of an adsorbent, and 0.1 to 5 parts of a disintegrating agent; the dispersing agent A is selected from at least one of polyoxyethylene ether, phosphate polyoxyethylene and EO/PO (Ethylene Oxide/Propylene Oxide) segmented copolymer surface active agents; the dispersing agent B is selected from at least one of lignosulfonate, alkyl naphthalene sulfonate, alkyl naphthalene sulfonate formaldehyde condensates and polycarboxylate. The test shows that the effective suspension rate and mass suspension rate of the triazolone water dispersible granules at normal temperature reach more than 90% and are close to 90% under the thermal storage condition; compared with the prior art, the triazolone water dispersible granules have the advantages that the suspension rate is reduced a little, the mass suspension rate and the effective suspension rate are consistent, and the suspension rate in the thermal storing condition is high in stability.

The invention relates to a method for regulating and controlling ecological photosynthesis of tall fescue by adopting household fine garbage compost, which comprises the following steps of: respectively scattering 3g of compost of which the particle diameter is 300nm and 3g of fine garbage compost of which the particle diameter is 240nm uniformly on the surface of 1750g of soil in a plastic basin of which the diameter is 7cm and the height is 10cm, and finally, uniformly covering 250g of loam on the compost; then, seeding 5g of tall fescue, wherein the temperature is controlled at 20-26 DEG C, the relative humidity is controlled at 40%-60%, and natural light permeating a room is used for illuminating; fully watering at the initial stage of seeding to ensure smooth germination of seeds and initial growth of seedlings; and weighing and watering every one or two days according to 55%-65% of field moisture capacity after two weeks to maintain the field moisture capacity in the stress range. The experimental result shows that under the drought stress, the fine garbage compost can regulate and control the photosynthesis of the tall fescue.

The invention discloses a papermaking wastewater treatment agent, which is prepared from a flocculating agent A, a flocculating agent B and a flocculating agent C, wherein the flocculating agent A isa modified bentonite solution with a mass content of 0.5%, the flocculating agent B is a polyaluminium chloride aqueous solution with a mass content of 3%, and the flocculating agent C is cationic polyacrylamide aqueous solution with a mass fraction of 0.1%, wherein the molecular weight of the cationic polyacrylamide is 8000000-12000000. The invention also discloses a use method of the papermakingwastewater treatment agent, wherein the use method comprises the following steps: adjusting the pH value of papermaking wastewater to 6-9, adding the flocculating agent A into the papermaking wastewater, quickly stirring, adding the flocculating agent B, slowly stirring until small micelle is generated, adding the flocculating agent C, slowly stirring to form large flocs, standing, separating theflocs in the circulating water, treating the papermaking wastewater, and feeding the treated papermaking wastewater into the next circulating treatment. The papermaking wastewater treatment agent islow in cost, simple in preparation and use process and good in treatment effect.

The invention discloses a preparation method of a hydrated inorganic salt expanded vermiculite paraffin PAM composite phase change energy storage material. The preparation method comprises the following steps: (1) preparing hydrated inorganic salt/expanded vermiculite by a physical impregnation method; (2) preparing a paraffin/PAM emulsion; (3) adding the hydrated inorganic salt/expanded vermiculite into the paraffin/PAM emulsion to prepare the hydrated inorganic salt/expanded vermiculite with addition of the hydrated inorganic salt/expanded vermiculite paraffin/PAM shape-stabilized phase change energy storage material. The invention effectively reduces the leakage of paraffin as well, improves the encapsulation efficiency of paraffin, and further improves the phase change latent heat of the material due to the existence of the hydrated inorganic salt; more importantly, the hydrated inorganic salt is compounded into the body of the paraffin/PAM shape-stabilized phase change material, so that the supercooling degree of the hydrated inorganic salt is effectively reduced. Test results show that the composite phase change material has high latent heat of phase change, good thermal stability and cycling stability, and good application prospect.