34results about How to "Long interaction time" patented technology

A YAG pulse laser oscillator 10 oscillates / outputs pulse width-variable YAG fundamental pulse laser light LB, and a YAG pulse laser oscillator 12 oscillates / outputs pulse width-variable YAG second harmonic pulse laser light SHG. An emission unit 20 superposes the pulse laser light LB and the pulse laser light SHG on the same optical axis and focuses, and irradiates a welding point K on welding pieces (W1 and W2) with, the pulse laser light LB and the pulse laser light SHG. A control unit 18 controls the laser oscillation operation of the laser oscillators 10 and 12 so that the point in time when the laser output of the YAG second harmonic pulse laser light SHG reaches its peak is slightly earlier than the point in time when the laser output of the YAG fundamental pulse laser light LB reaches its peak.

The invention discloses a bubbling type ultrasonic atomized mercury valence transformation device and a method, and aims to efficiently transform mercury of oxidation state, which is in coal-fired flue gas and can not be measured easily, into mercury of element state, which can be measured easily. The device provided by the invention is characterized in that flue gas extracted in the field is treated by a bubbling type reactor, so that a great amount of micron-sized bubbles are generated; meanwhile, an ultrasonic atomization technology is used to treat stannous chloride hydrochloric acid solution, so that a great amount of micron-sized fog drips are formed; after the bubbles and the fog drips are combined, the contact area of sample gas and stannous chloride hydrochloric acid solution can be improved greatly; and meanwhile, a baffle plate is arranged to prolong the interaction time of sample gas and stannous chloride hydrochloric acid solution. According to the invention, the efficiency of transforming mercury of oxidation state into mercury of element state through a stannous chloride wet chemistry method can be improved to the utmost extent, the operation of continuously transforming mercury of oxidation state into mercury of reduction state on line under the condition of a laboratory and practical flue gas can be realized, and real-time, comprehensive and accurate measurement of mercury state in an on-line mode can be implemented.

The invention discloses a cold atom gravimeter and a detection method, which relate to the technical field of cold atom gravity detection, and aim at solving the technical problem that the sensitivityof an existing cold atom gravimeter is difficult to improve. The method comprises the following steps of preparing a ground-state cold atomic group which vertically moves upwards, applying verticallyupward two-photon stimulated Raman pulses to the ground-state cold atomic group, dividing the ground-state cold atomic group into two cold atomic groups which are in a superposed state and have different speeds, and enabling the two cold atomic groups to be subjected to beam splitting to move on two paths, applying two-photon stimulated Raman pulses to the two cold atomic groups, reversing the internal states of the two cold atomic groups, and transferring momentum, trapping the two cold atomic groups of which the inner states are reversed until the two cold atomic groups fall freely, applying the two-photon stimulated Raman pulse to the two falling cold atomic groups again, and superposing and combining the internal states of the two cold atomic groups, so that the two cold atomic groupsinterfere with each other, and collecting interference fringes of the cold atomic group which generates interference.

The invention relates to a polyurethane foam combined explosion-proof device and a polyurethane foam material, and belongs to the technical field of explosion-proof structures. The device comprises acylinder body and a cover body; the cylinder body is made of a polyurethane foam material; the cover body comprises a polyurethane foam cover and a liquid cover; the polyurethane foam cover is locatedat the upper end of the cylinder body and is embedded into the cylinder body; the depth of the polyurethane foam cover embedded into the cylinder body is adjustable; the liquid cover is located abovethe cylinder body and covers the polyurethane foam cover; and an air gap is kept between the liquid cover and the polyurethane foam cover. The device has a good explosion-proof performance. The polyurethane foam of the polyurethane foam material is prepared by compounding surface silylated carbon black, carbon nano-tubes and polyurethane; the two materials cooperate with each other to increase cohesive energy of the materials; the mechanical properties of the polyurethane are improved; and reinforcing and toughening effects are achieved.

The invention disclosed a compound fertilizer which comprises basic nutrition fertilizer including nitrogen, phosphorus and potassium, and also comprises gamma-polyglutamic acid and seaweed extract, wherein the gamma-polyglutamic acid accounts for 0.1-2% of the basic nutrition fertilizer, and the seaweed extract accounts for 0.5-2% of the basic nutrition fertilizer. The compound fertilizer containing the gamma-polyglutamic acid and the seaweed extract has high activity biological function, and is capable of improving the yield and the resistance capability such as disease resistance, drought resistance, cold resistance, lodging resistance and the like of crops. Therefore, the compound fertilizer can be widely applied to grain crops such as wheat, rice, corn and the like, and cash crops such as tomatoes, melons, grapes and the like. One-off fertilization can be realized without topdressing, and the yield of the crops can be increased by 10-30%.

The utility model provides a method that realizes laser output by using the separation field technology, belonging to the laser technical field. The method utilizes the separation field technology to divide the laser resonator into two or more folded parts; the atoms and the laser resonator are coupled at a plurality of times; the interaction time of the atomic beam and the resonator is increased; the influence of flight time broadening to laser line width is reduced; therefore, the line width of the output laser is obviously thinner than common laser. The utility model also provides a separation field laser; the laser gain medium of the laser and the field mode of the laser cavity have a plurality of coherent interactions separated on the time domain; the separation field laser has the advantages of good frequency stability and high frequency accuracy.

The invention relates to an oral nano-vaccine of large yellow croaker and an immune type large yellow croaker feed prepared by the same. The oral nano-vaccine comprises MSN-DLDH nano-particles and enteric coatings coating the surfaces of the MSN-DLDH nano-particles. The MSN-DLDH nano particles are nano particles formed by assembling DLDH protein and a mesoporous silica micro-nano carrying system;and the enteric coatings are hydroxypropyl methylcellulose phthalate. The nano-vaccine disclosed by the invention has the advantages of low cost, simple preparation process, good capability of tolerating a strongly acidic stomach environment of fishes and the like. Besides, the vaccine has no toxicity to kidney cells of the large yellow croaker and is good in biocompatibility; and thus a technicalsupport is provided for research and development of oral nano-vaccines and clinical application in the future.

The invention provides a method for realizing laser output by using separation field technology, which belongs to the field of laser technology. This method uses separation field technology to divide the laser resonator into two or more equivalent parts, and the atoms and the laser resonator are coupled to each other multiple times, which increases the interaction time between the atomic beam and the resonator and reduces the time-of-flight increase. The effect of width on the laser line width, so the output laser line width is significantly narrower than that of ordinary lasers. The invention also provides a separated field laser. The laser gain medium of the laser and the field mode of the laser cavity have coherent effects separated in several time domains, and have the characteristics of good frequency stability and high frequency accuracy.

The invention relates to a polyurethane foam combined explosion-proof device and a polyurethane foam material, belonging to the technical field of explosion-proof structures. The device includes a cylinder and a cover, the cylinder is made of polyurethane foam, the cover includes a polyurethane foam cover and a liquid cover, the polyurethane foam cover is located at the upper end of the cylinder and embedded in the cylinder, and the polyurethane foam cover is embedded The depth inside the barrel is adjustable, the liquid cover is located above the barrel and covers the polyurethane foam cover, and an air gap is left between the liquid cover and the polyurethane foam cover. The device has good explosion-proof performance. The polyurethane foam material described in the polyurethane foam is compounded with surface silanized carbon black, carbon nanotubes and polyurethane, and the two synergistically increase the cohesive energy of the material, improve the mechanical properties of polyurethane, and achieve the effect of strengthening and toughening.

The invention discloses a method for improving the light energy utilization rate of a photosynthetic pigment by utilizing the slow photon effect of a photonic crystal, which is characterized by comprising the following steps of: preparing photonic crystal hydrogel of which the blue edge or red edge of a photonic band gap is matched with the ultraviolet-visible absorption peak of the photosynthetic pigment of algae; and combining algae to the surface of the photonic crystal hydrogel by utilizing electrostatic interaction to form an algae / photonic crystal assembly. By means of the method, the photosynthesis efficiency of the algae plants can be improved by 100%.

The invention relates to the technical field of PTA (pure terephthalic acid) materials, and discloses a preparation method of PTA with a flame-retardant function. The preparation method comprises thefollowing steps: mixing a salicylic acid aqueous solution, a hypoflorous acid aqueous solution, magnesia-alumina spinel, alkali magnesium sulfate whisker and nickel iron spinel, grinding the mixture by a high energy liquid ball grinder, performing calcination, grinding by the ball grinder, performing radio frequency plasma treatment, performing ultrasonic dispersion in an organic silicone ethanolsolution, and performing filtration, washing, drying and sieving to prepare flame retardant powder; mixing acetic acid and deionized water, adding a sodium hexametaphosphate aqueous solution and the flame retardant powder, performing beating evenly, fusing a product with CTA slurry, performing crystallization three times, and performing washing, solid-liquid separation, steam drying and hydrogenation refining to prepare PTA. A flame-retardant modifier is added to the PTA preparation process, so that PTA has a flame-retardant function, and a synthetic material is prepared from PTA, interactiontime between the modifier and a substrate is long, the fusion degree is good, the synergistic effect is sufficient, and flame retardancy and mechanical properties of the synthetic material can be significantly enhanced.

The invention discloses a bubbling type ultrasonic atomized mercury valence transformation device and a method, and aims to efficiently transform mercury of oxidation state, which is in coal-fired flue gas and can not be measured easily, into mercury of element state, which can be measured easily. The device provided by the invention is characterized in that flue gas extracted in the field is treated by a bubbling type reactor, so that a great amount of micron-sized bubbles are generated; meanwhile, an ultrasonic atomization technology is used to treat stannous chloride hydrochloric acid solution, so that a great amount of micron-sized fog drips are formed; after the bubbles and the fog drips are combined, the contact area of sample gas and stannous chloride hydrochloric acid solution can be improved greatly; and meanwhile, a baffle plate is arranged to prolong the interaction time of sample gas and stannous chloride hydrochloric acid solution. According to the invention, the efficiency of transforming mercury of oxidation state into mercury of element state through a stannous chloride wet chemistry method can be improved to the utmost extent, the operation of continuously transforming mercury of oxidation state into mercury of reduction state on line under the condition of a laboratory and practical flue gas can be realized, and real-time, comprehensive and accurate measurement of mercury state in an on-line mode can be implemented.

A plate-type heat exchange high-efficiency energy-saving furnace, which includes a water-jacketed furnace body and a water-jacketed outer cylinder of a plate heat exchanger, a water inlet, a water outlet, a flue gas exhaust port and an exhaust port, and a blower. It is characterized by: The feed combustion chamber, combustion chamber, pyrotechnic baffle chamber, flue gas chamber and flue gas outlet in the plate heat exchanger are connected to form a pyrotechnic reciprocating heating path. The plate heat exchanger consists of a water jacket outer cylinder, A number of water jackets arranged in the outer cylinder of the water jacket are connected from the end to the end; the water jacket furnace body is connected to the water jacket outer cylinder of the plate heat exchanger; the water inlet provided on the water jacket furnace body, the water jacket furnace body The water jacket, the pipeline built in the pyrotechnic baffle chamber, the outer cylinder of the water jacket of the plate heat exchanger, several water sleeves and the water outlet are connected in sequence from end to end to form a heat exchange path for water to and fro. It has the advantages of large heating area, complete combustion, sufficient heat exchange, high thermal efficiency, no pollution to the environment, and low cost.

The invention relates to a continuous wave cavity ring-down spectrum device and method based on an electromagnetic induction transparent effect. The device comprises a continuous wave semiconductor laser, wherein the continuous wave semiconductor laser is used as a light source of detecting light and control light; a front cavity mirror of an optical resonant cavity, a first polarization splitting prism, an electromagnetic induction transparent medium air chamber, a second polarization splitting prism, an air chamber of samples to be tested, a back cavity mirror of the optical resonant cavity and a photoelectric detector used for receiving a detecting optical signal are sequentially arranged on the optical path of the emergent detecting light. The electromagnetic induction transparent effect and the cavity ring-down spectrum technology are combined; the specific zero-absorption high-dispersion effect of the electromagnetic induction transparent effect is applied to the retarding of the speed of photons in the cavity; the photon service life is prolonged; the mutual acting time between the photons and the samples is increased, so that the cavity ring-down spectrum sensitivity is greatly improved. The device and the method have the characteristics that the structure is simple; the regulation is convenient and easy; the compatibility is good, and the like.

The invention discloses a silicon solar thin film battery based on a double-layer micro-nano two-dimensional multi-tooth resonant grating. Micro-nano two-dimensional multi-tooth resonant grating, each period has two grating teeth made of silicon material, and two grating grooves made of air. By adjusting the structural size of the micro-nano two-dimensional multi-tooth resonant grating on the upper and lower surfaces of the silicon active layer, the position of the grating teeth and the thickness of the grating, theoretical analysis shows that the absorption efficiency of the silicon solar thin film cell to the incident light can reach more than 81.8%, which can The interaction ability between the silicon active layer and sunlight is significantly improved, thereby improving the photoelectric conversion efficiency of the silicon solar thin film cell.