9results about How to "Increase conversion rate" patented technology

The application provides a folded cascode amplifier, an integrated circuit, a chip and an electronic device. The folded cascode amplifier comprises a bias circuit configured to provide a bias current according to a bias voltage, a first input differential unit and a second input differential unit arranged symmetrically, a folded cascode unit, and a fifth group of current mirrors connected to the folded cascode unit. The folded cascode unit comprises a first group of cascode tubes and a second group of cascode tubes, and a first group of current mirrors to a fourth group of current mirrors. The first group of cascode tubes comprises a first output transistor and a first load current tube connected in series, the second group of cascode tubes comprises a second output transistor and a second load current tube connected in series, and the first group of current mirrors multiplexes the first load current tube, and the fourth group of current mirrors multiplexes the second load current tube. The folded cascode amplifier improves the transconductance, the slew rate, the conversion rate and the gain-bandwidth product through the proportional cooperation of the several groups of current mirrors.

The utility model provides a kind of gasifier and sterilization cabinet system, the gasifier includes liquid storage bottle, first flow pump, first water tank, first heating device, vaporization pipe, second water tank, second heating device, second flow pump, heating pipe, circulating inlet water pipe and circulating backwater pipe, first heating device and second heating device are heated respectively to first water tank and second water tank, vaporization pipe first end is arranged in first water tank and is communicated with liquid storage bottle by liquid outlet pipe, and the second end of vaporization pipe is provided with use connecting end, heating pipe is sleeved between the both ends of vaporization pipe, and heating passage is formed between vaporization pipe and heating pipe, and the both ends of heating passage are communicated with second water tank by circulating inlet water pipe and circulating backwater pipe respectively, and first flow pump and second flow pump are connected on liquid outlet pipe and circulating inlet water pipe respectively;The sterilization cabinet system includes sterilization cabinet and gasifier.The utility model can avoid that gas after vaporization is condensed into liquid and improve liquid gas conversion rate.

A method for preparing di-(2-hydroxyisopropyl)benzene, a key intermediate of hydroquinone. The method comprises the following steps: (1) reacting diisopropylbenzene and an oxygen-containing gas in the presence of an alkali and an initiator to obtain a liquid containing solid di-(2-hydroxyisopropyl)benzene; (2) separating and purifying the solid di-(2-hydroxyisopropyl)benzene to obtain a di-(2-hydroxyisopropyl)benzene product with a content >99.95%, wherein the initiator includes one or more of azobisisobutyronitrile, diisopropylbenzene dipperoxide, and diisopropylbenzene peroxide, and the alkali includes sodium hydroxide, potassium hydroxide, or a combination thereof, and the oxidation reaction in step (1) is carried out at a temperature of 80-150°C and a pressure of 0.3-1.8 MPa.

This utility model relates to a rotary kiln lining structure; each ring of the inner lining layer is provided with at least four evenly distributed lifting bricks, the inner surface of which protrudes from the inner surface of the microporous energy-saving inner lining brick. The lifting bricks on each ring of the inner lining layer are positioned one brick in the direction of rotary kiln operation, and form a corrugated spiral protrusion structure for tipping, lifting, and pushing materials. This improves the heat energy conversion rate, thereby improving the quality stability of the rotary kiln, increasing output, saving energy and reducing consumption, and achieving significant environmental protection effects, ultimately achieving the goal of a low-carbon economy.

This application discloses a DAB converter and its driving control method. The method includes: obtaining the voltage transfer ratio based on the input voltage and output voltage of the DAB converter; obtaining the feedforward power based on the input voltage, voltage transfer ratio, and output current of the DAB converter; obtaining the primary-to-secondary side shift ratio based on the input voltage, output voltage, voltage transfer ratio, input current, and feedforward power of the DAB converter; obtaining the primary-side inward shift ratio and the secondary-side inward shift ratio based on the voltage transfer ratio, feedforward power, and the primary-to-secondary side shift ratio; and driving the DAB converter based on the primary-side inward shift ratio, the secondary-side inward shift ratio, and the primary-to-secondary side shift ratio. This invention optimizes the values ​​of the primary-side inward shift ratio, the secondary-side inward shift ratio, and the primary-to-secondary side shift ratio using relevant parameters of the DAB converter to achieve precise driving control of the DAB converter. By adjusting the control parameters of the DAB converter, the soft-switching range can be expanded, current stress reduced, and light-load efficiency improved, while significantly increasing the system's energy conversion rate.

The application provides a hybrid structure analog-to-digital converter, belonging to the technical field of integrated circuit design, comprising a 7 bit first-order feed-forward incremental delta sigma ADC and an 8 bit single-stage cyclic ADC. The incremental delta sigma ADC adopts a first-order feed-forward structure, so that an input signal is directly fed to a comparator input end for comparison without passing through a modulator loop, thereby reducing the influence of non-ideal factors in the modulator loop on the input signal. In addition, the input end of the comparator is reset to a common mode level when the comparator is not working, so as to eliminate the influence of inconsistent voltage changes of two input ends of the comparator caused by incomplete matching of a layout wiring of the comparator input end on the circuit, and improve the overall signal-to-noise ratio of the circuit. By using the hybrid structure analog-to-digital converter provided by the application, the signal-to-noise ratio and the conversion speed are improved, and the conversion time is reduced without adding additional circuits.

The invention provides a method for preparing olefin through photo-catalytic oxidative dehydrogenation of alkane, and belongs to the technical field of photo-catalytic preparation of olefin. The method for preparing olefin through photo-catalytic oxidative dehydrogenation of alkane comprises the following steps: by taking a xenon lamp as a light source, introducing mixed gas containing alkane into a photo-catalytic reactor loaded with a photocatalyst, under the illumination condition, alkane in the mixed gas is subjected to oxidative dehydrogenation to obtain olefin; wherein the photocatalyst comprises a TiO2 {001} carrier and a bimetallic alloy loaded on the TiO2 {001} carrier, the bimetallic alloy is an alloy formed by Pd and other metals, and the other metals are selected from any one of Fe, Ni, Cu, Zn, Pt, Ag and Au; wherein the mixed gas further comprises oxygen and inert gas, the alkane is ethane or propane, and the olefin is ethylene or propylene.

The present invention aims to provide a method for preparing a modified Ni / CeO2 catalyst and its application, belonging to the field of CO2 methanation catalyst technology. This invention uses ammonia solutions in different solvents as precipitants, adding the precipitants dropwise to a cerium salt solution and stirring to obtain a flocculent mixture. After filtration, washing, drying, and calcination, a CeO2 support modified with ammonia solutions in different solvents is obtained. The modified Ni / CeO2 catalyst precursor is prepared using a volumetric impregnation method. By modifying the CeO2 support with ammonia solutions in different solvents, the synthesized Ni / CeO2 catalyst precursor is treated with a reducing atmosphere, and the aggregation of Ni nanoparticles is effectively suppressed by optimizing the Ni-CeO2 interaction structure. The Ni / CeO2 catalyst prepared by this invention using ammonia solutions with water as the solvent exhibits excellent low-temperature methanation activity, with a CH4 selectivity approaching 100%, and stable catalytic performance.

The application relates to the technical field of barium element utilization in barite minerals, and specifically discloses a method for improving the utilization efficiency of barium elements in barite minerals. The method comprises the following steps: mixing crushed barite and crushed coal in a weight ratio of 1:(0.2-0.25), and then extruding and balling to obtain pellets, wherein the particle size of the pellets is 20-80 mm; the pellets are subjected to microwave roasting and crushing, the crushing product is subjected to water leaching to obtain a barium sulfide solution, and the barium residue is subjected to acid liquid dissolution and leaching, and then subjected to solid-liquid separation to obtain a barium ion solution and a residue stone. The method can significantly improve the yield of water-soluble BaS and the comprehensive utilization rate of barium elements in barite, and the process is environmentally friendly, low in pollution and high in production efficiency.