125results about How to "Increase conversion rate" patented technology

The invention relates to a method for preparing methanol based on carbon dioxide capture, and a method for preparing ethylene glycol and environment-friendly polyester. The method comprises the following steps: capturing and purifying a byproduct high-concentration carbon dioxide gas flow in a petroleum refining process into high-purity carbon dioxide, and sequentially carrying out hydrogenation reaction and preparation of green methanol in three stages of fixed bed reactors, a copper-zinc-calcium-magnesium-aluminum hydrogenation catalyst is adopted in the first-stage reactor and the third-stage reactor, and the copper-zinc-calcium-magnesium-aluminum hydrogenation catalyst is adopted in the second-stage reactor and the third-stage reactor. And a copper-zirconium-titanium-vanadium deposition type hydrogenation catalyst is adopted in the second-stage reactor. The green ethylene glycol can be prepared from the green methanol through an MTO process, ethylene oxidation and ethylene oxide hydrolysis. The environment-friendly carbon-reducing polyester can be prepared from the green ethylene glycol and terephthalic acid PTA through slurry preparation, esterification reaction and polymerization reaction; in the esterification and polymerization process, by adding a specific esterification catalyst and a compound stabilizer, the performance of the environment-friendly carbon-reducing polyester can be improved, and the performance of the environment-friendly carbon-reducing polyester is equivalent to that of a polyester product corresponding to petrochemical method ethylene glycol.

The invention relates to a self-adaptive wide-temperature-interval air-cooled fiber laser and a control method, the self-adaptive wide-temperature-interval air-cooled fiber laser comprises a shell, a first pumping module, a second pumping module, a control module, a first current driving module and a second current driving module are arranged in the shell, the first current driving module is connected with the first pumping module, and the second current driving module is connected with the second pumping module. The first current driving module is connected with the first pumping module, the second current driving module is connected with the second pumping module, a laser gain cavity is formed in the side face of the shell, a first fan and a second fan are arranged on one side of the shell, a first air cooling heat dissipation plate and a second air cooling heat dissipation plate are arranged on the other side of the shell, and the laser gain cavity is connected with the first pumping module and the second pumping module. The first fan, the second fan, the first pumping module, the second pumping module, the first current driving module and the second current driving module are all connected with the control module, and the laser gain cavity is connected with an optical fiber cladding light filter. By controlling the temperature environment, the pump light conversion rate is increased.

The invention relates to the technical field of gas injection, in particular to a carbon dioxide gas-liquid combined mixed injection structure and a using method thereof.The carbon dioxide gas-liquid combined mixed injection structure comprises a reaction tank, a hollow pipe and a communicating pipe, the hollow pipe and the communicating pipe are installed at the two ends of the reaction tank, and the end, away from the reaction tank, of the communicating pipe communicates with a discharging pipe; the piston cylinder is installed at the end of the hollow pipe, a double-material pumping mechanism is arranged in the piston cylinder, and the double-material pumping mechanism can convey materials in the piston cylinder into the hollow pipe so as to adjust the pressure intensity in the hollow pipe; the pressurization atomization mechanism is arranged in the hollow pipe; and the conduction regulation and control mechanism is arranged in the conduction pipe, a follow-up disc is connected to the conduction regulation and control mechanism, a second discharge hole is formed in the follow-up disc, and a follow-up rotating assembly is further arranged in the conduction pipe. Therefore, the effect of spraying gas under the specific pressure is achieved.

The invention provides a neutron spectrum optimization method for improving the isotope irradiation production conversion rate, and relates to the technical field of reactor engineering. Monte Carlo modeling is performed on an isotope target and related mechanisms; then Monte Carlo critical calculation is carried out, and initial neutron energy spectrums are obtained respectively; next, on the basis of the initial neutron energy spectrum, neutron energy spectrum sensitivity analysis is carried out on the target isotope; on the premise that the total neutron flux is kept unchanged, an ideal neutron energy spectrum is obtained; comparing the difference between the initial neutron energy spectrum and the ideal neutron energy spectrum, and arranging a neutron filter around an isotope target in the Monte Carlo model; then, the material type of the neutron filter is replaced, neutron energy spectrums under different material types are calculated through Monte Carlo criticality, and the material type capable of improving the target nuclide conversion rate is determined; and finally, based on the determined neutron filter material type, obtaining an optimized neutron energy spectrum. The conversion rate of isotope irradiation, namely the production efficiency of isotopes, can be improved.

The invention provides a client follow-up information processing method and device and electronic equipment. The method comprises the steps that client follow-up information to be processed currently in a client management system is acquired; performing sentiment analysis prediction on the customer follow-up information through a preset sentiment analysis model, and outputting a sentiment classification tag corresponding to the customer follow-up information; determining a target customer index type corresponding to the customer follow-up information based on the emotion classification labels corresponding to the customer follow-up information; based on the sentiment classification label and the target customer index type, counting the customer follow-up information into existing billboard data; the billboard data comprises statistical data under a single label dimension and / or a combination of a plurality of label dimensions, and after an event meeting a decision triggering condition is monitored in the billboard data, decision reminding is carried out on salesmen. In the scheme of the invention, customer judgment standards are unified, automatic judgment, analysis and decision reminding can be realized, the transaction period can be shortened, the conversion rate can be improved, and the customer maintenance cost can be reduced.

The invention relates to the technical field of silicon carbide powder manufacturing, in particular to a high-purity silicon carbide powder synthesis method which comprises the steps that S1, graphite paper or carbon fiber cloth is pasted to a resistance heating material and / or the inner wall of a deposition chamber, and the resistance heating material is connected to an electrode; s2, the pressure in the deposition chamber is adjusted to a vacuum state or replaced with an argon atmosphere, and the temperature is increased to 900-1300 DEG C; s3, methyl trichlorosilane, silicon chloride, hydrogen, argon and hydrocarbon gas are conveyed into the deposition chamber in proportion for deposition for 10-150 h, and a silicon carbide block is obtained; s4, the obtained silicon carbide blocks are sequentially subjected to crushing treatment and cleaning treatment, and silicon carbide powder is obtained; and S5, carrying out high-temperature treatment on the silicon carbide powder to obtain the silicon carbide powder for silicon carbide single crystal growth. The method can improve the production efficiency of the silicon carbide powder and reduce the production cost; the synthesized silicon carbide powder has controllable particle size and high purity.

The invention discloses a preparation method of a composite denitration catalyst based on a Cu-BTC metal organic framework, the composite denitration catalyst and a denitration catalytic filter material, and relates to the technical field of denitration catalysis. The preparation method comprises the following steps: taking Cu-BTC as a sacrificial template, dipping the sacrificial template in a manganese acetate mixed solution with a certain concentration, carrying out rotary evaporation at a certain temperature to dryness, then putting into a drying oven to dry a sample, and finally preparing the CuO / Cu2O / Mn3O4 composite denitration catalytic material by adopting a high-temperature carbonization and high-temperature oxidation sectional calcination method. The composite denitration catalytic material prepared in the invention presents a spherical morphology with certain pores and uniform distribution, metal oxides with different valence states have excellent oxidation-reduction performance, electron transfer between NH3 and NOx is promoted, and the process of a reduction reaction is accelerated; the metal with different valence states can promote the reaction between NH3 and NOx, and the prepared composite denitration catalyst is stable in structure, low in temperature, efficient, green, environmentally friendly, non-toxic and harmless.

The invention provides a three-dimensional scene file processing method and device and electronic equipment, and aims to solve the technical problems that model information is single, a scene rendering effect cannot be reserved, modification and maintenance are tedious and the like in a processing method for directly importing all 3D scene files (generally FBX format files) constructed by 3D design software into a UE5 unreal engine. According to the application, after each 3D scene file constructed for the developed application is obtained, scene elements which cannot be recognized by a UE5 unreal engine are converted into rendering elements supported by a target renderer, and then each required scene element is selected to be processed into a target scene file in a target file format which can be recognized by the UE5 unreal engine to be exported; the method is used for inputting a UE5 unreal engine to reliably obtain corresponding scene resources, the information retention rate of 3D scene conversion and the scene rendering effect conversion rate are greatly improved, and the image quality of an application scene output by subsequent service execution is ensured.

The invention discloses a novel field passivation and high-reliability photovoltaic module which comprises a box body, an auxiliary structure is slidably connected to the inner wall of the box body, a waterproof layer is slidably connected to the inner wall of the box body, a baffle is fixedly connected to the top end of the waterproof layer, a cover plate is fixedly connected to the bottom end of the waterproof layer, and a sliding rod is fixedly connected to the left side of the cover plate. According to the novel field passivation and high-reliability photovoltaic module, a waterproof layer and a cover plate are arranged, so that the waterproof layer can effectively prevent moisture from permeating into the photovoltaic module at night or when the weather condition is poor, and the photovoltaic module is convenient to use. The problem that the photoelectric conversion rate of the photovoltaic module is influenced by the problems of battery short circuit, corrosion and the like caused by a humid environment is prevented, and the cover plate can block dust and sandy soil, so that the surface of equipment is kept clean and tidy to a certain extent, the surface is ensured to absorb light more sufficiently, and the photoelectric conversion rate is improved.

The invention discloses a preparation method and application of a lithium-sulfur battery positive electrode material. The preparation method comprises the following steps: cross-linking chitosan and phytic acid to prepare porous biological carbon aerogel; compounding the porous biochar aerogel with a catalyst nano In2O3 to obtain a porous biochar aerogel-coated In2O3 composite material; performing freeze drying and microwave heating treatment to carbonize the aerogel to obtain an N, P co-doped three-dimensional porous biological carbon-coated In2O3 composite material; and compounding with elemental S to obtain an N and P co-doped three-dimensional porous biochar (at) In2O3 (at) S composite material, namely the lithium-sulfur battery positive electrode material. The positive electrode material with a'confinement-anchoring-catalytic conversion 'multifunctional coupling effect is constructed, when the positive electrode material is applied to the lithium-sulfur battery, confinement and anchoring of LiPSs can be achieved, catalytic conversion of the LiPSs can be promoted, the shuttle effect of the LiPSs is fundamentally inhibited, and the rate and the cycling stability of the LiPSs are remarkably improved; the method has the advantages of simple preparation process, environmental friendliness and the like.

The invention provides a method for improving the quality of fermented cigar tobacco leaves through a composite biological enzyme preparation, and relates to the technical field of tobacco production. According to the method, the accumulation of polyphenol metabolites in the cigar tobacco leaf fermentation process is promoted through common auxiliary fermentation of the fiveleaf gynostemma herb extracting solution, cellulase and neutral protease, so that chemical components in the tobacco leaf fermentation process are more coordinated, and the chemical quality and aroma quality of the fermented tobacco leaves are improved.

The invention discloses a current-steering DAC (Digital-to-Analog Converter) architecture, which relates to a microelectronic circuit technology and comprises a differential dual decoding module, a multiplexer network, a switch driving circuit array and a current source array, the differential dual decoding module comprises two decoding units with consistent structures, namely a decoding unit I and a decoding unit II; the decoding unit I is provided with an input signal input end, the decoding unit II is provided with an inverted input signal input end, the decoding unit is provided with a low-order decoding signal output end, a second decoding signal output end and a third decoding signal output end, the low-order decoding signal output end is connected with the input end of the switch driving circuit array, and the third decoding signal output end is connected with the input end of the switch driving circuit array. The second decoding signal output end and the third decoding signal output end are respectively connected with the input end of the switch driving circuit array through the multiplexer network, and the multiplexer network is also provided with a shift control signal input end. According to the invention, the problems of transmission delay and large loss of high-voltage transmission under high frequency are reduced, and the conversion rate is improved.

The invention relates to a hydrogen metallurgy supplementary heating method and device. The method comprises the following steps: 1) storing biomass synthesis gas generated by a biomass gasifier in a gas storage tank; 2) blowing the biomass synthesis gas into a heat exchanger through a fan for primary heating, wherein the primary heating temperature is 80-200 DEG C; (3) introducing the biomass synthesis gas subjected to primary heating into a combustor, igniting, and carrying out secondary heating, wherein the temperature of the secondary heating is 800-1300 DEG C; and (4) mixing the biomass synthesis gas subjected to secondary heating with gas flowing out of the secondary hydrogen metallurgy reactor, feeding the mixture into a primary hydrogen metallurgy reactor, and controlling the temperature of the mixed gas entering the primary hydrogen metallurgy reactor to be 700-900 DEG C. According to the invention, biomass synthesis gas containing CO, H2 and CH4 is gasified by utilizing renewable resource biomass energy, so that the hydrogen content in the original gas is not reduced, a part of reducing gas CO and H2 is added, a part of combustible gas can be combusted for heating, and the reduction reaction of the hydrogen metallurgy reactor is promoted to be carried out more efficiently.

The invention relates to electrochemical treatment of nitrate wastewater, in particular to a preparation method and application of an atomic-scale dispersed copper and cobalt bimetallic catalyst. Comprising the following steps of (1) a Cu precursor preparation method, (2) a Co precursor preparation method, (3) high-temperature pyrolysis and (4) a redundant metal component removal method. The atomic-scale dispersed copper and cobalt bimetallic catalyst disclosed by the invention has relatively high metal loading capacity and relatively high stability. When the Cu-Co-N-C catalyst is applied to the nitrate electroreduction reaction, the toxic by-product nitrite is obviously reduced, the conversion rate of nitrate is obviously improved, and the ammonia nitrogen selectivity is obviously improved.

The invention discloses polyamide with a main chain containing a thioester group and a synthesis method thereof, the structural general formula of the polyamide with the main chain containing the thioester group is shown in the following formula (I) or (II), in the formula, n is selected from 1-200; according to the polymer product disclosed by the invention, the polyamide of which the main chain contains the thioester group has a definite structure, a main chain repeating unit has thioester and amide structures and also contains different functional groups, and an end group has further reactivity; the polyamide containing the thioester group also has relatively high molecular mass and excellent mechanical properties; # imgabs0 #

The invention discloses antibacterial gynecological gel and a preparation method thereof, and relates to the field of gynecological products, arginine powder and sorbitol are dissolved in water, a hydrothermal reaction is performed at 130-160 DEG C, cooling is performed to obtain an arginine carbon quantum dot solution, then modified hydrogel and a plant extract are added, vacuum stirring and uniform mixing are performed, ultraviolet irradiation is started while stirring, standing is performed, and the antibacterial gynecological gel is obtained. The bacteriostatic gynecological gel is obtained. The adopted gel matrix releases arginine carbon quantum dots in a weak acid environment, and is compounded with active substances, especially flavonoid substances, in the plant extracting solution, so that a better synergistic antibacterial effect is achieved. Sensitive response of the carbon quantum dots to illumination is combined, so that the carbon quantum dots can be attached to a gel matrix more easily; meanwhile, polar groups, especially oxygen-containing groups, are introduced to the surface of the gel, so that the viscosity and the adhesiveness of the gel material are greatly improved, and the affected part can be better treated.

The invention provides a method for synthesizing pentaerythritol, and belongs to the technical field of organic synthesis. The method comprises the following steps: adding a formaldehyde aqueous solution and a formaldehyde glycan inhibitor into a condensation reaction kettle, heating the solution to 48-52 DEG C, dropwise adding liquid caustic soda and acetaldehyde, keeping the temperature after dropwise adding, and then adding acid to adjust the pH value to 6-6.8; and transferring the solution into a dealdehyding tower and a dealcoholizing tower for dealdehyding and dealcoholizing to obtain a condensation liquid, adding acid into the condensation liquid to adjust the pH value to 3-4, feeding the condensation liquid into a hydrolysis tower for hydrolysis, feeding the hydrolysis liquid into a crystallization kettle, and cooling and crystallizing to obtain a pentaerythritol product. According to the method disclosed by the invention, the saccharification reaction of the formaldehyde glycan is effectively inhibited by adding the formaldehyde glycan inhibitor into the reaction liquid, and the conversion rate of the dipentaerythritol is improved. And the condensation liquid after dealdehyding and dealcoholization is subjected to acid addition and pressurized hydrolysis, so that organic impurities are reduced, and the product quality is improved.

The invention discloses a method for synthesizing p-hydroxyanisole by catalyzing oxidation of anisole with a TS-1 titanium silicalite molecular sieve, which comprises the following steps: 1) adding anisole, acetonitrile, tert-butyl alcohol and the TS-1 titanium silicalite molecular sieve into a reaction container, controlling the temperature at 45-55 DEG C, and stirring for reaction; 2) filtering the TS-1 titanium silicalite molecular sieve; controlling the temperature to be 0-10 DEG C, and adding a reducing agent to quench oxidability; concentrating dry tert-butyl alcohol and acetonitrile; extracting by using an organic solvent; washing is performed; concentrating the dry organic phase; and 3) carrying out vacuum reduced pressure distillation, and collecting fractions to obtain the product. According to the method, the anisole which is relatively low in price is used as a raw material, the TS-1 titanium silicalite molecular sieve catalyst is used as a core, so that no black oil exists in the reaction for producing the p-hydroxyanisole, the yield of the p-hydroxyanisole is increased to 93% and the selectivity is as high as 97% due to the acetonitrile and tert-butyl alcohol solvents, the selectivity and conversion rate of the reaction are greatly improved, and the method is suitable for industrial production. The method has the characteristics of simple process, high yield, good quality and the like.

The invention provides an information processing method and device, equipment and a storage medium, and the method comprises the steps: if the service information of a to-be-used object of a target user meets a preset recommendation triggering condition, displaying a recommendation information flow of the to-be-used object in an information recommendation page; wherein the recommendation information flow comprises a plurality of candidate service options corresponding to at least one kind of service information of the to-be-used object; in response to a selection operation of one candidate service option corresponding to the at least one kind of service information, updating the service information of the to-be-used object; and if the service information of the to-be-used object meets the preset service triggering condition, executing a service task corresponding to the to-be-used object. According to the application, the use reminding service of the ordered object can be provided for the user to remind and guide the user to use the ordered object in time, so that the transaction efficiency and the conversion rate of the object can be improved.

The invention discloses an LDO (Low Dropout Regulator) circuit with high PSR (Power Supply Response) and enhanced transient response, which comprises an LDO basic circuit, a biasing circuit, a feedforward power supply ripple elimination path, an overshoot suppression path and an undershoot suppression path, wherein the biasing circuit and the LDO basic circuit are connected with the feedforward power supply ripple elimination path, the overshoot suppression path and the undershoot suppression path. All devices in the feedforward power supply ripple elimination path can be set based on the size of a power tube in the LDO basic circuit to offset power supply ripples, and therefore the PSR of the LDO circuit is improved. The feedforward power supply ripple elimination path and the undershoot suppression path are combined to realize circuit multiplexing, so that the static power consumption of the LDO circuit is reduced. The overshoot suppression path and the undershoot suppression path increase the conversion rate of an output node in a feedback mode, so that the transient response of the LDO circuit to large load changes is enhanced, and the overshoot voltage and the undershoot voltage of the output end are reduced.

The invention relates to the technical field of hydrometallurgy, and provides a method for cleanly extracting vanadium from vanadium slag based on dolomite. According to the method, dolomite is adopted to replace a traditional calcification or sodium salt roasting auxiliary agent to co-roast the vanadium slag, and vanadium in the vanadium slag is roasted through two-step temperature control to be converted into acid-soluble calcium magnesium vanadate roasting clinker. The roasting clinker is subjected to acid leaching to obtain vanadium liquid, the vanadium liquid is subjected to deep impurity removal through a magnesium ammonium phosphate precipitation method, ammonium sulfate is added into the vanadium liquid, the pH value is adjusted, acid ammonium salt vanadium precipitation is conducted, and ammonium polyvanadate is obtained. And washing, filtering, drying and calcining the ammonium polyvanadate to obtain high-purity powder vanadium pentoxide or melting and casting to obtain high-purity tablet vanadium pentoxide. Vanadium precipitation wastewater is subjected to reduction treatment, lime neutralization and solid-liquid separation and then is reused in a leaching system, and cyclic utilization of ammonium salt and water resources is achieved. By means of the technical scheme, the problem that in the related technology, the vanadium leaching rate is low is solved.

The invention provides a method for preparing high-yield allyl alcohol, comprising mixing acetaldehyde, an organic chloride and a phase transfer catalyst, reacting under alkaline conditions, extracting to obtain an aqueous phase; sequentially dehydrating and acidifying the aqueous phase and performing reduced pressure distillation to obtain acrylic acid; finally, mixing the acrylic acid with a reducing agent for reaction, and performing atmospheric distillation to obtain allyl alcohol. The invention selects acetaldehyde and an organic chloride capable of synthesizing carbene as raw materials, and fully and effectively converts them into a target product under the action of a phase transfer catalyst and a carbene substrate, thereby avoiding the generation of by-products. At the same time, molecular distillation technology is used to make the reaction and separation more efficient, and the obtained allyl alcohol has high purity and high yield. The preparation method is carried out under normal pressure and relatively low temperature, and no harmful waste is generated during the reaction. The method has the characteristics of simple process, low energy consumption, economy, environmental protection, and suitability for industrial large-scale production, and overcomes the technical defects in the traditional allyl alcohol preparation method, thereby providing a new method for the industrial production of allyl alcohol.

The present invention relates to a method for preparing 2,3-butanediol from ethanol. The method uses a semiconductor photocatalyst and a metal salt additive to convert ethanol into 2,3-butanediol under light, and simultaneously generates hydrogen. Starting from ethanol, the method improves the selectivity of 2,3-butanediol and the conversion rate of ethanol through the metal salt additive, and has the advantages of wide raw material sources, high atom economy, good reaction selectivity and mild reaction conditions.

The invention provides a sulfating roasting smelting process of lepidolite, and relates to the technical field of mineral processing. A sulfating roasting smelting process of lepidolite comprises the following steps that S1, low-temperature oxidizing roasting is conducted, specifically, the lepidolite and concentrated sulfuric acid are evenly mixed, and a mixed material A is obtained through low-temperature oxidizing roasting; s2, high-temperature reduction roasting: crushing the mixed material A, adding an auxiliary agent and a wave-absorbing agent, uniformly mixing, and performing high-temperature reduction roasting to obtain a mixed material B; s3, water leaching: carrying out water leaching reaction on the mixed material B, and filtering to obtain lithium slag and brine; s4, concentrating and cooling: concentrating and cooling the brine to obtain concentrated brine and potassium sulfate; s5, impurity removal: removing impurities from the concentrated brine, and filtering to obtain purified liquid; s6, lithium precipitation: adding sodium carbonate into the purified liquid to obtain lithium carbonate and lithium precipitation mother liquid; and S7, extraction and reverse extraction: performing multi-stage extraction and reverse extraction on the lithium precipitation mother liquor to obtain rubidium cesium salt. The smelting process provided by the invention is low in energy consumption and high in product yield.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The utility model provides a spraying and stirring type soil carbon solid storage capacity improving device which comprises a working box, a motor I, a water pump and a fertilizer liquid box, a stirring tank, a stirring assembly and a spraying assembly are arranged in the working box; the stirring tank is in contact connection with the inner wall of the working box, a discharging port is formed in the stirring tank, the stirring assembly is connected with the output end of the first motor, the spraying assembly is fixed to the inner wall of the working box, a water inlet of the water pump is communicated with the fertilizer liquid box through a pipeline, and a water outlet of the water pump is communicated with the spraying assembly through a pipeline; the device is high in automation degree, good in grading soil organic carbon fixing effect, uniform in soil organic carbon distribution and good in stability, and fertilizer liquid waste is effectively avoided.

The invention relates to the technical field of hydraulic pincers, in particular to a hydraulic pincer for electric power overhaul, which comprises a protective shell and a shell cover, the upper surface of the protective shell is fixedly connected with a pincer head, the pincer head is provided with a mounting port, and two pressing knives are arranged in the mounting port; the upper pressing cutter is fixedly connected with the upper inner wall of the mounting opening, the lower pressing cutter is fixedly connected with a driving rod, the cross section of the driving rod is T-shaped, and the driving rod is slidably connected with the protective shell; and a mounting plate is fixedly connected to the interior of the protective shell, and a rotating column is connected to the mounting plate through a first torsion spring. According to the hydraulic clamp, the force conversion rate is relatively high, a user can easily cut off a part of objects with relatively high hardness in a labor-saving manner in the electric power overhaul process, electric power overhaul work is facilitated, and the practicability of the hydraulic clamp is relatively high.

The invention belongs to the technical field of biochemical engineering, and particularly relates to application of a P450 enzyme mutant and engineering bacteria thereof in synthesis of calcifediol, and the mutant is obtained by mutating one or more sites in an amino acid sequence based on a wild type P450 enzyme Vdh; the amino acid sequence of the wild type P450 enzyme Vdh corresponds to the accession number of GenBank, namely CP069288.1. Through systematic molecular dynamics simulation, conservative analysis and substrate binding pocket engineering on the Vdh enzyme, a plurality of key mutation sites are successfully screened and obtained. The constructed combined mutant (such as I144R / N173M / Q310R, Vdh-M3) shows extremely high hydroxylation activity, the pure enzyme activity of the combined mutant can reach 9.8 times that of a wild type enzyme, and the conversion rate from vitamin D3 to calcifediol is greatly increased.

The application discloses a photovoltaic energy-saving curtain wall based on a renewable energy system and belongs to the technical field of photovoltaic energy-saving curtain walls, which comprises a longitudinal beam assembly installed on a building outer wall, a cross beam assembly vertically installed on the longitudinal beam assembly, and a positioning frame sealingly installed between the longitudinal beam assembly and the cross beam assembly; a folding photovoltaic power generation module is used to convert renewable solar energy into electric energy; the folding photovoltaic power generation module comprises a fixed strip plate fixedly installed in the center of the positioning frame, two groups of movable strip plates symmetrically installed in the positioning frame relative to the fixed strip plate, and two groups of photovoltaic plates arranged between the movable strip plates and the positioning frame and rotationally connected with each other; the photovoltaic energy-saving curtain wall can control the rotation and folding of the multiple groups of photovoltaic plates according to the needs of building ventilation, illumination and light energy conversion, and can synchronously drive the longitudinal movement of a cleaning flow guide module during the operation process, so that the surface of the photovoltaic plate can be automatically cleaned.

The invention relates to the technical field of magnetic suspension equipment power supply protection, in particular to a magnetic suspension equipment uninterruptible protection power supply system, which comprises a power supply module with an input end connected with an alternating current mains supply end; the input end of the first AC / DC module is connected with the output end of the power supply module, the output end of the first AC / DC module is connected with the magnetic suspension system, and the first AC / DC module is used for converting alternating current into direct current to supply power to the magnetic suspension system; the input end of the charging and discharging assembly is connected with the output end of the power supply module or the output end of the first AC / DC module, the output end of the charging and discharging assembly is connected with the magnetic suspension system, and the charging and discharging assembly is used for charging by using the direct current supplied by the power supply module and providing the direct current to the magnetic suspension system after the alternating current mains supply loses power. According to the invention, under the condition that the external mains supply suddenly loses power, the charging and discharging assembly can still supply power to the magnetic suspension system, and the process that the direct current of the battery pack is inverted and then rectified in a UPS + AC / DC scheme is omitted, so that the power generation efficiency is improved, the battery capacity can be reduced, the conversion rate is improved, and the system cost is reduced.