364results about How to "Improve conversion efficiency" patented technology

The invention discloses recombinant escherichia coli with high yield of N-acetylneuraminic acid and application of the recombinant escherichia coli, and relates to the technical field of biological genetic engineering. The invention relates to a recombinant escherichia coli, which is characterized in that the escherichia coli is taken as a host, and free expression of an N-acetylmannosamine epimerase gene yihS from Streptomyces xiamenensis or an N-acetylmannosamine epimerase gene ce3 from Bacteroides polymorpha and an exogenous N-acetylneuraminic acid lyase gene nano A is carried out; and carrying out recombinant expression on N-acetyl hexosamine 1-kinase nahK, a UDP-N-acetyl glucosamine pyrophosphorylase gene glmU and a UDP-N-acetyl glucosamine-2-epimerase gene neuC in the other synthetic route of the ManNAc. According to the recombinant escherichia coli with high yield of N-acetylneuraminic acid, the yield of N-acetylneuraminic acid can reach 23.08 g / L under a shake flask fermentation condition; a two-stage batch feeding strategy is adopted, the yield of N-acetylneuraminic acid in a 5L fermentation tank reaches 71.25 g / L, the molar conversion rate of GlcNAc reaches up to 57.60%, and the method has the potential of industrial application.

This invention discloses a method for enhancing and controlling the radiation of an LPP-EUV light source based on dual-pulse spatiotemporal co-constraint, belonging to the field of semiconductor manufacturing technology. This invention obtains a spatiotemporal reference by real-time monitoring of a liquid metal droplet, uses a pre-pulse laser to induce target material deformation into a fogged target cloud, and combines high-speed imaging and a hydrodynamic model to predict the time and coordinates of the target cloud's energy absorption peak. It dynamically adjusts the delay time and optical axis direction of the main pulse laser to achieve dual-pulse spatiotemporal co-constraint, and constructs a closed-loop control system through a recursive least squares algorithm with a dynamic forgetting factor. This invention effectively improves the extreme ultraviolet light conversion efficiency, controls the power fluctuation of the light source within ±0.5%, and extends the maintenance cycle of optical components by 2 times. It can be widely applied to next-generation high-power extreme ultraviolet lithography light source systems, meeting the application requirements of semiconductor miniaturization processes.

The application discloses a heat preservation method and device of a vehicle power battery, electronic equipment and a storage medium. The method comprises the following steps: obtaining a battery state parameter of a power battery of a vehicle and an environment condition parameter of an environment in which the vehicle is currently located; determining a target battery heat preservation strategy from a preset battery heat preservation strategy set based on the battery state parameter and the environment condition parameter, wherein the preset battery heat preservation strategy set comprises a plurality of battery heat preservation strategies, and the preset battery heat preservation strategy set at least comprises a first battery heat preservation strategy, and the first battery heat preservation strategy is used for indicating that a heat-electricity conversion device is driven by electric energy obtained by a new energy equipment to perform heat preservation on the power battery; and performing heat preservation on the power battery based on the target battery heat preservation strategy. The application solves the technical problems that the power battery is excessively consumed in heat preservation in the related art, and the energy utilization rate is low.

The utility model discloses a kind of TCP protocol conversion LIN protocol communication conversion module, it includes shell, the bottom of the shell is connected with mounting block, LIN protocol interface is provided on the side of module shell, the positive side of module shell is provided with indicator light, power module and TCP protocol interface, wherein the inside of the module shell is also provided with main control chip module, the main control chip module is used to parse and convert LIN protocol data and TCP protocol data;LIN protocol interface is used to connect with external LIN protocol equipment, receives and sends LIN protocol data, the TCP protocol interface is used to connect with external network, data transmission based on TCP protocol. Advantage: it has the advantage that long-distance transmission can be efficiently and stably realized LIN protocol and TCP protocol conversion, and support.

The application relates to the photovoltaic technical field, in particular to a solar printing screen structure, a fusing equipment thereof and a processing method, which comprise an electrode pattern, a main grid pattern line, a warp and a weft, the warp and the weft are woven to form a printing screen, a mesh hole is formed between two adjacent warps and two adjacent wefts, the warp is parallel to the main grid pattern line, the main grid pattern line is symmetrically arranged on the two sides of the electrode pattern, a main grid pad point is located in the electrode pattern, and the part of the warp in the coverage range of the electrode pattern is subjected to fusing treatment outside the coverage range of the electrode pattern. The application has the effects of improving the wear resistance of the printing screen and improving the conversion efficiency of the battery.

This invention relates to the field of pumped storage power station simulation technology, specifically providing a method and apparatus for converting a 3D model of a pumped storage power station into a standard format. The method includes: extracting 3D model information of the pumped storage power station from a 3DE platform; constructing a lightweight BIM model data structure corresponding to the nodes of the 3D model in memory based on the 3D model information; constructing a hierarchical element structure according to the BIS standard based on the lightweight BIM model data structure; and exporting it as a standard format file of the pumped storage power station 3D model. This solution enables the export of a 3D model of a pumped storage power station into a standard format, overcoming the limitations of the native export function of 3DE, achieving full information conversion of the BIM model, ensuring that the geometric and attribute information of elements in the model is not lost, improving data conversion efficiency, reducing manual intervention costs, and achieving seamless data flow and shared application, meeting the data delivery and application needs of various scenarios in the infrastructure field.

A kind of detection method and device of fake APP, terminal, the method includes: determining training data;Keyword extraction is carried out to the brief introduction of each pair of target APP and the brief introduction of suspected APP, and the data vector of each keyword is determined;Determine the weight value of each keyword, and the data vector of each keyword in the target APP is weighted based on the weight value Operation is carried out to obtain target APP data vector, and obtain suspected APP data vector;The vector comparison result of target APP data vector and suspected APP data vector is calculated, the absolute value of the vector comparison result is determined as first data vector, and the square of the vector comparison result is determined as second data vector;Obtain the training text vector of the pair of target APP and suspected APP;Training fake detection model.The present application can enhance the association between keywords in model training phase, reduce the misjudgment rate.

The present application provides a kind of monocrystalline silicon cell and its preparation method, including the following steps: texturing on at least one surface of monocrystalline silicon wafer substrate, obtain the monocrystalline silicon wafer with a plurality of continuous pyramid structure of pyramid surface on the at least one surface;At least one pyramid surface of the obtained monocrystalline silicon wafer is doped with diffuser, obtain the monocrystalline silicon wafer with PN junction;Using slurry containing spherical metal particles on the side of the monocrystalline silicon wafer with PN junction with the at least one pyramid surface electrode grid printing and sintering, so that spherical metal particles form ohmic contact with pyramid surface.The present application further includes by laser SE process to enhance the ohmic contact of metal particles and pyramid tip.The present application improves fill factor, reduces open circuit voltage loss, increases battery conversion efficiency;Meet the dual needs of reducing contact area contact resistance and reducing non-contact area carrier recombination, reduce the electrical loss of solar cell.

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 discloses a low-temperature vacuum annular electron accelerator arc reactor, which relates to the field of electromagnetism and is applied to the technology and concept of energy generation, conversion and transmission. The device is composed of a high-voltage electron gun module (1), a low-temperature vacuum annular pipe module (2), a sealing module (3), an accelerating electric field module (4), a magnet guiding module (5), a magnetic core module (6), an induction coil output module (7) and a base module (8). According to the technology and the concept, a low-temperature vacuum annular electron accelerator is used for replacing a primary coil winding of a traditional transformer, that is, the same electric field is used for circularly accelerating electrons emitted into an annular vacuum tube by an electron gun to form annular electron flow to replace the primary coil winding of the traditional transformer. When the high-speed circling electrons lose to accelerate the action of an electric field, due to the mass inertia effect of the high-speed electrons, the annular current cannot disappear immediately under the guidance of the magnetic lines of force of the fixed magnet, the magnetic flux of the magnetic core still changes, and therefore the secondary coil can still obtain corresponding arc discharge. Therefore, the inductive discharge of the secondary coil can reversely act on the energy conversion of the accelerating electric field or the electron gun, so that the energy conversion efficiency is improved, and the energy loss is reduced.

The invention discloses an application of an OsPLT1 gene in promotion of rice callus regeneration. It is found for the first time that overexpression of OsPLT1 can improve the regeneration and transformation efficiency of rice calluses, including rice varieties difficult to differentiate and regenerate. Furthermore, the OsPLT1-rZmG2-rZmW2 is used in a combined manner, and a rice callus specific promoter is used for driving gene segment transformation, so that the transformation efficiency of the rice is further improved.

The application discloses a protection and distortion control method and system during sound operation, and relates to the technical field of audio processing. An audio signal and a reference signal are acquired; the reference signal is preprocessed to obtain a trigger signal of a level effective value; a trigger threshold is acquired according to the trigger signal of the level effective value; the trigger threshold is adjusted to obtain a preset trigger threshold; the preset trigger threshold is dynamically adjusted according to a voltage value corresponding to a frequency of the audio signal to obtain a voltage value corresponding to the preset trigger threshold; and the audio frequency corresponding to the voltage value corresponding to the preset trigger threshold is a protected and distortion-controlled audio signal. The application realizes dynamic change of a high-frequency cutoff frequency of an audio high-frequency unit while maintaining the loudness of a sound field restoration of a sound system, and improves the protection and distortion control accuracy of the sound in a limit operation state of high power and long time.

The present application relates to the technical field of energy storage, and relates to an energy storage system based on thermochemical energy storage and Rankine cycle and an operation method. The energy storage system comprises a storage device, an energy storage device, an energy release device and a power generation device. The energy storage device comprises a calcium carbonate rotary calcining kiln, a first heat exchanger network and an electric heater, and the structural components are sequentially connected. The electric heater is used to convert excess electricity into heat energy, the calcium carbonate decomposition reaction is carried out in the calcium carbonate rotary calcining kiln, the heat energy is converted into chemical energy stored in calcium oxide, the energy release device is used to convert the chemical energy stored in calcium oxide into heat energy, the heat energy is converted into electricity by the power generation device, and the electricity demand of the terminal user is met. The energy storage system provided by the present application can realize the conversion, transmission and storage of different energies, has high energy conversion efficiency, can effectively reduce the coal consumption in the energy conversion process, and meets the energy saving and carbon reduction and flexibility reconstruction requirements of coal-fired power plants.

The invention relates to the technical field of power electronic direct-current converters, in particular to an input and output common-ground high-gain boost converter which comprises a direct-current voltage source Vin, diode components D0-D4, capacitor components C0-C4, a first coupling inductor L1, a second coupling inductor L2, a first mosfet tube S1, a second mosfet tube S2 and a resistor R. The two main loops operate in a staggered mode, so that input current is continuous, input current ripples are small, relatively stable energy is continuously provided for the circuit, the voltage multiplication unit is adopted, the amplification factor of the circuit is increased, the duty ratio of the mosfet tubes S1 and S2 is adjusted, and small current ripples can be kept even under the condition that the boost factor is large. The device has the advantages of high step-up ratio, low device stress, high efficiency, easiness in control and implementation, lower cost and the like, and is suitable for a new energy power generation scene needing high direct current bus voltage grid-connected output under a low input voltage condition.

The utility model provides a kind of for the illumination reaction device of alfacalcidol, including the liquid storage tank to be lighted, circulating pump and illumination reaction tank formed by pipeline connection circulation passway, wherein: illumination reaction tank center is provided with the LED light of cylindrical shape, and there are a plurality of upper and lower interval arrangement partition plates in periphery, and the serpentine reaction channel of upper and lower bending is formed between a plurality of partition plates.The utility model illumination reaction device can realize uniform stable illumination reaction by the design of illumination reaction tank and serpentine reaction channel, reduce the optical path of reaction liquid, improve alfacalcidol illumination reaction efficiency and product quality consistency, effectively overcome the technical defects of traditional equipment.

The application discloses a method and device for constructing hydraulic simulation data. The method comprises: determining a hydraulic role corresponding to each visible component in a BIM model; determining a first face dictionary, a connection element dictionary and a connection face list based on the determination result of the hydraulic role; processing bottom surface data and top surface data of the visible component whose corresponding hydraulic role is a connection element based on the connection element dictionary to determine a receiving area set and a centroid point set; determining a support DEM dictionary and a blocking DEM dictionary based on the first face dictionary, and determining a final support DEM dictionary based on the determined support DEM dictionary and the determined blocking DEM dictionary; and determining a connection DEM dictionary based on the first face dictionary and the connection face list. Thus, the conversion efficiency from the BIM model to the hydraulic simulation is improved.

The application discloses a terahertz mixer, comprising: a radio frequency input waveguide, a local oscillator input waveguide, a local oscillator filter and an intermediate frequency output waveguide, wherein the intermediate frequency output waveguide comprises a built-in fin line transition structure and a Schottky diode pair; one end of the fin line transition structure is connected with the radio frequency input waveguide, the other end of the fin line transition structure is connected with the local oscillator filter, the Schottky diode pair is connected with one side of the fin line transition structure and connected with an intermediate frequency output port of the intermediate frequency output waveguide; after the local oscillator signal is filtered by the local oscillator filter, the local oscillator signal is transmitted to the fin line transition structure, the radio frequency signal and the local oscillator signal are loaded into the Schottky diode pair through the fin line transition structure for frequency mixing, and the intermediate frequency signal is output through the intermediate frequency output port. In this case, the fin line transition structure simultaneously carries the radio frequency signal and the local oscillator signal, which can realize spatial superposition and power efficient injection of the signals, and has good impedance matching characteristics.

The invention discloses an automatic spring clamp forming machine, which relates to the field of spring clamp preparation and comprises a spring clamp rotary feeding bin, spring clamp reciprocating up-down forming equipment, spring clamp carrier pressure maintaining equipment and spring clamp pressure maintaining completion discharging equipment. By the adoption of the scheme, through full-automatic mechanical preparation, the spring clamp preparation efficiency is improved; and after the spring clamp is folded and bonded, the pressure of the spring clamp can be maintained for a certain time, so that the spring clamp is prevented from being bounced off due to glue failure caused by the fact that glue is not dry, and the yield is improved.

The invention relates to an ether bond type covalent organic polymer (TPTF-AO) containing an amidoxime group and a synthesis method thereof. The method comprises the following steps: by taking 2, 4, 6-tri (4-hydroxyphenyl)-1, 3, 5-triazine and tetrafluoroterephthalonitrile as raw materials, constructing a covalent organic polymer precursor (TPTF) connected by a stable ether bond through nucleophilic substitution reaction of hydroxyl and fluorine atoms; further, the cyano group in the TPTF is subjected to amidoximation reaction under a mild condition and is efficiently converted into an amidoxime group, and the target product TPTF-AO is obtained. The polymer has a rigid skeleton connected by ether bonds and a mesoporous-macroporous composite pore channel structure, and has excellent chemical stability, thermal stability, rapid mass transfer capability and high-density metal ion coordination sites. The bottleneck that a traditional imine bond material is insufficient in stability is broken through, the problem that functional modification and skeleton stability are difficult to be compatible is solved, and the obtained material has wide application prospects in the fields of uranyl ion adsorption, catalysis, energy storage and the like.

The utility model discloses a high-efficiency photovoltaic module which comprises a first battery string, a second battery string, a third battery string, a fourth battery string, a fifth battery string, a sixth battery string, a seventh battery string, an eighth battery string, a ninth battery string, a tenth battery string, an eleventh battery string and a twelfth battery string which are formed by welding a plurality of battery pieces together through a plurality of welding strips. A first bus bar is welded to one side of the first battery string, one side of the third battery string, one side of the fifth battery string, one side of the seventh battery string, one side of the ninth battery string and one side of the eleventh battery string, a second bus bar is welded between the first battery string and the seventh battery string, a second bus bar is welded between the sixth battery string and the seventh battery string, and a third bus bar is welded between the second battery string and the eighth battery string. And a bus bar 3 is welded between the battery string 4 and the battery string 10, and the bus bar is overlapped with the battery pieces, so that the area occupied by the bus bar is reduced, and the conversion efficiency is improved.

The application belongs to the technical field of switching power supply, and an auxiliary circuit is added between two branches of a traditional two-phase Dickson converter; in a dead time when all main power tubes are closed, the auxiliary circuit can transfer the charge of one branch to another branch, realizes zero-voltage turn-on of all main power tubes, and reduces switching loss.

The invention discloses a photovoltaic-radiation refrigeration integrated glass curtain wall sunshade component, and relates to the technical field of photovoltaic building energy conservation, and the photovoltaic-radiation refrigeration integrated glass curtain wall sunshade component comprises a building wall surface, glass, an outer frame, a stand column, a sliding rail, an execution mechanism and a sunshade unit; the building wall surface is of a square structure and serves as a room enclosing wall and a positioning foundation; the glass is fixed on a peripheral building wall surface; the outer frame is fixed at the top end of the glass; the two stand columns are fixed to the two sides of the outer frame respectively, and a sliding rail is fixed in each stand column. The sunshade unit is arranged between the two sliding rails through an executing mechanism and comprises photovoltaic shutters, the sunshade area and angle are adjusted through the photovoltaic shutters, the radiation refrigeration function is implemented, and therefore the multiple functions of sunshade, power generation and heat dissipation are achieved, and dynamic balance of target indoor illumination and high power generation efficiency is continuously maintained. The technical effects of collaborative optimization of photovoltaic and sunshade functions, improvement of the heat dissipation effect, improvement of the regulation and control flexibility, meeting of the lighting requirement, maximization of the power generation efficiency and improvement of the energy-saving effect can be achieved at the same time.

The invention discloses a construction method and application of a basic group editor of industrial bacteria of cephalosporium acremonium based on CRISPR-Cas9 (clustered regularly interspaced short palindromic repeats-associated protein 9), and belongs to the field of gene engineering. The cephalosporium acremonium industrial bacterium base editor provided by the invention can be used for specific mutation of a specific site of the DNA level of the cephalosporium acremonium industrial bacterium. The cytosine base editor CBE constructed by the invention is a plasmid comprising a fusion protein A and an sgRNA expression element. The base editor CBE can successfully mediate C.G-T.A, is suitable for the base editor of the high-yield CPC cephalosporium acremonium industrial bacteria, utilizes the protoplast, is high in conversion efficiency, can mediate specific site mutation in the cephalosporium acremonium industrial bacteria, and has application value.

This invention provides a coherent anti-Stokes Raman microscope system, its driving method, and its microscopic apparatus. The coherent anti-Stokes Raman microscope system includes: a femtosecond laser front-end module, a dual-wavelength module, a pulse broadening and amplification module, a time delay module, a spectral broadening and filtering module, a second harmonic generation module, a dispersion compensation module, and a microscope module. The self-phase modulation spectral selection (SESS) driven coherent anti-Stokes Raman microscope system of this invention uses a self-phase modulation spectral selection (SESS) method to convert a 1550 nm pulse wavelength to 1600 nm. Through a frequency doubling crystal, a second harmonic generation process is achieved, converting the 1600 nm pulse wavelength to 800 nm, thus realizing coherent anti-Stokes Raman microscopy imaging, i.e., selective imaging of various biological tissue components. Compared with other wavelength conversion methods, the device is simple, has high conversion efficiency, is tunable, and has strong scalability.

The invention discloses a Boost conversion circuit and a power supply module, and relates to the technical field of electronics, and the Boost conversion circuit comprises the steps that a boost module receives an input voltage and carries out energy storage and release; the PWM control module generates a control signal to drive a switching device in the boosting module to be switched on and switched off; when the switching device is turned off, the energy stored in the boosting module is released through the positive voltage output module to provide positive output voltage, and meanwhile, a first energy storage element in the negative voltage generation module is charged; when the switching device is switched on, charges stored in a first energy storage element in the negative voltage generation module are transferred to a second energy storage element, and negative output voltage is established on the second energy storage element; the feedback sampling module is used for sampling an output voltage signal and feeding back the output voltage signal to the PWM control module, and the PWM control module adjusts a control signal to stabilize the voltage between the positive output voltage end and the negative output voltage end. By implementing the technical scheme, the effect of improving the positive and negative dual-voltage output stability is achieved.

The application relates to the technical field of integrated circuits, and discloses a digital auxiliary adaptive zero-crossing detection circuit. The circuit comprises a digital auxiliary comparator module, a digital logic module, a detection discrimination module and a counter module. The digital auxiliary comparator module compares a switch node voltage signal with a power ground signal to generate a first output signal; the digital logic module processes the first output signal to generate a zero-crossing detection signal and control the turn-off of a power tube; the detection discrimination module receives a second output signal of the digital logic module and the zero-crossing detection signal to generate a digital tuning signal; and the counter module receives the digital tuning signal to generate a six-digit digital signal, dynamically adjusts a resistance array in the digital auxiliary comparator module, adaptively adjusts the flip offset of the comparator by changing the resistance value of the resistance array, and thus changes the turn-off timing of the power tube. The application can accurately control the turn-off timing of a synchronous rectification power tube, reduce the reverse current and reduce the dynamic power consumption.

The invention discloses a method for regulating and controlling efficient conversion of methanol based on (p) ppGpp signal molecules. Specifically, by regulating synthesis and hydrolysis balance of (p) ppGpp signal molecules in microbial cells and combining promoter engineering and nutrition condition optimization, methanol metabolic pathway key gene expression and amino acid metabolic flux are enhanced, and the methanol utilization efficiency and target product synthesis capacity of microorganisms are remarkably improved. The regulation and control mechanism of the (p) ppGpp on methanol conversion under the stress of a low nitrogen source is defined for the first time, efficient conversion of methanol to organic acids such as acetic acid and butyric acid is realized, a brand new strategy is provided for preparation of high-added-value chemicals through methanol bioconversion, and the method has the advantages of being economical, environmentally friendly and high in conversion efficiency and has a wide application prospect.