33results about How to "Solve unfavorable problems" patented technology

The invention discloses an adjustable multimedia teaching auxiliary device, which comprises a support frame, a storage battery is fixedly connected to the middle position of the inner bottom of the support frame, chute is opened on the bottom of the inner wall on both sides of the support frame, and the inner walls of the two chute A sliding block is movably connected, and a movable plate is fixedly connected between the opposite sides of the two sliding blocks. The invention provides an adjustable multimedia teaching auxiliary device. By setting an electric push rod and universal wheels, it has the advantages of being convenient to move and fix. By setting a buffer device, it has the advantage of shock absorption. By setting a driving motor, a screw rod, The adjustment block and the top plate have the advantage of adjusting the projection height of the multimedia setting, the advantages of adjusting the projection direction of the multimedia equipment by setting the rotating disk and the fixed shaft, and the adjustment of the projection angle of the multimedia equipment by setting the adjustment seat, the pin shaft and the adjustment bolt Advantages, it solves the problem that multimedia equipment is not easy to adjust in teaching.

The invention discloses a formula of an absorbing emulsion of volatile organic compounds (VOCs). The absorbing emulsion is a W/O/W (Water/Oil/Water) multiple emulsion and comprises the main components: white oil, water, emulsifying agents (Tween-80 and Span-80) and inorganic salt (sodium silicate, sodium phosphate and sodium carbonate), wherein the volume ratio of the white oil to the water is 1: (3/7-7/3), the total mass of the emulsifying agents (Tween-80 and Span-80) is 1-10% (g/ml) of the total volume of mineral oil-water, and the total mass of the inorganic salt is higher than the total volume of the mineral oil-water by less than 1% (g/ml). According to the formula, the absorbing emulsion of the VOCs has the advantages of simple preparation method, high absorption rate of the VOCs, good dispersibility, regeneration, low regeneration cost and the like. The invention also discloses a preparation method of the absorbing emulsion.

The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.

The invention relates to a hollow slab bridge structure with end floor beams and a construction method thereof, and belongs to the technical field of civil construction. The hollow slab bridge structure comprises a precast hollow slab, the end floor beams and a cast-in-situ structure layer. The precast hollow slab is supported by temporary supports which are arranged on two adjacent pier caps side by side in the horizontal direction of a bridge, the end floor beams supported by permanent supports are cast on the peripheral portions of the two ends of the precast hollow slab, and the cast-in-situ structure layer formed with the end floor beams together is cast on the end floor beams and the precast hollow slab. The hollow slab bridge structure is simple, the construction method is simple, the horizontal load transmission capacity of the hollow slab bridge structure with the end floor beams is improved, and the defect that a bridge structure is at an unfavorable stress state easily when supports of an existing domestic assembled type hollow slab bridge disengage is overcome.

The invention provides a portable waterborne emergency lifesaving device. A chamber in which a foamed material can be arranged is formed in the end of a closed box which can be connected with a strap; a capsule cavity in which a soft airbag can be arranged and is fixedly connected is formed in the other end of the closed box; a foamed liquid material channel for regulating the on-off by virtue of a key switch is formed between the chamber and the capsule cavity; a closeable foamed liquid material injection hole is formed in the outer end of the chamber; a sealing cover expanded to open is arranged at the outer end of the capsule cavity; a strap fastening ring through which the strap can be inserted is arranged on one side of the closed box which can be connected with the strap; and a pull ring capable of pulling the key switch is arranged on one side opposite to the key switch of the box. During use, a polyurethane foamed material is injected into the chamber, the device is fixed on a human body after the box is connected with the strap by virtue of the strap fastening ring, and during waterborne swimming or waterborne operation, the foamed liquid can enter the soft airbag so as to form a solid foamed material by virtue of the key switch during emergency, a water floating effect can be achieved, the device is small in size and convenient to carry, and the formed block is large in size and high in buoyancy.

The invention belongs to the technical field of neutron generators, and particularly relates to a vertical neutron generator. The vertical neutron generator comprises a D+ ion source and a straight pipe type cooling liquid flow guide pipe which are arranged in a movable main cabinet; the cooling liquid flow guide pipe is perpendicular to the ground, a high-voltage input module is arranged at the top end of the cooling liquid flow guide pipe, a target electrode is arranged at the tail end of the cooling liquid flow guide pipe, and the D+ ion source is located below the target electrode. The vertical neutron generator also comprises a straight pipe type vacuum cavity, wherein one end of the vacuum cavity is connected with the tail end of the cooling liquid flow guide pipe in a sealed mode, the other end of the vacuum cavity is connected with the tail end of the D+ ion source in a sealed mode, and the target electrode is located in the vacuum cavity. The vertical neutron generator also comprises a molecular pump unit which is used for vacuumizing the vacuum cavity; the high-voltage input module provides high-voltage electricity for the target electrode, the cooling liquid flow guide pipe provides cooling for the target electrode, and the D+ ion source emits D+ ion beams to the target electrode, so neutrons are generated on the target electrode. Generation of neutrons of the neutron generator can be remotely controlled, the structure can be split, main consumables are maintainable target pieces and ion sources, and the service life is basically not limited.

The invention discloses an underground engineering reserved deformation joint connecting interface structure. The underground engineering reserved deformation joint connecting interface structure is characterized in that a groove (3) is formed in a boundary surface of new/old concretes (1 and 2), a left-side steel plate water-stop belt (4) is reserved in the old concrete (2) and positioned at the groove (3), the left-side steel plate water-stop belt (4) is welded with a right-side steel plate water-stop belt (5), the right-side steel plate water-stop belt (5) is positioned in the new concrete (1), a deformation joint (6) is formed in the cross section of the new concrete (1), a detachable water-stop belt (7) which is perpendicular to the deformation joint (6) is arranged in the deformation joint (6), and meanwhile, two ends of the detachable water-stop belt (7) are buried in the new concretes (1) on two sides. The underground engineering reserved deformation joint connecting interface structure has the advantages that adverse problems of a frequently used reserved interface mode are solved, a protection function can be fulfilled well in an early period, construction is facilitated in a later period, construction quality is ensured, and the waterproof performance is good.

The invention provides a Fenton-like oxidation method for waste resin. The method comprises the following steps: 1) mixing the radioactive waste resin having water generated in nuclear industry and acomposite catalyst, adding a certain amount of Na2SO4, and performing full stirring; and 2) controlling the reaction temperature and pH, introducing oxygen or performing aeration, adding H2O2 with a certain concentration by mass through valve control, and performing rapid degradation on the waste resin under the energization condition to make the organic components of the waste resin inorganic, wherein the catalyst is a mixture of Fe<2+> and Mn<2+> or Co<2+>. By using the oxidation method and device provided by the invention, the oxidative degradation efficiency of the waste resin can be improved in a shorter reaction time, the use amount of H2O2 during the treatment can be reduced, and the generation rate of an oxidant during the treatment can be improved; and the method has the advantages of a simple process, high efficiency and low production costs.

The invention discloses an ejection type sidewall coring device. The ejection type sidewall coring device comprises a collecting circuit, an electromagnet, a coring device body, an ejection head, a base, a connector and a sealing cylinder, wherein the ejection head is fixedly connected with the base, the base sleeves the electromagnet, and the electromagnet is fixed to the interior of the coring device body; one end of the sealing cylinder is connected with the connector, and the other end is connected with the coring device body; and the collecting circuit is arranged in the sealing cylinder. According to the ejection type sidewall coring device, gunpowder driving is replaced by electromagnetic ejection, and the problem of dependence of impact type sidewall coring on gunpowder can be solved.

The invention provides a glyceryl monolinoleate coprecipitation method for preparing propolis liquid, which solves the problem of dissolution rate of propolis and other bioactive components in the propolis can be kept to the maximum extent in a production process, used auxiliary materials can be widely applied to the production without limitation of a national standard use limit, the problem that after the auxiliary materials are used, side products unfavorable for a human body are generated or the auxiliary materials are unfavorable for the human body is solved, one big advantage of producing the propolis liquid by using a coprecipitation method is great reduction of residue of the propolis, practice shows that the residue of the propolis is only below 0.1% of the charged propolis, nearly no residue exists, the dissolution is thorough, a technical solution takes glyceryl monolinoleate as the auxiliary material and edible alcohol as a solvent, a precipitation technology is adopted to dissolve propolis in the glyceryl monolinoleate and forms a stable liquid state, and the alcohol is dried and recycled to obtain the propolis liquid.