260results about How to "Increase conversion rate" patented technology

Improved regulation and transient response are provided by a power supply architecture providing both unregulated and regulated voltage converters in parallel but deriving input power from separate power supplies connected in series wherein regulated and unregulated branches each provide a substantially fixed and constant proportion of the output current. The series connection of input power sources may provide a further feedback mechanism in addition to feedback for regulation which enhances overall performance. As a perfecting feature of the invention, inductor-less resonant converters which are switched in an interleaved fashion may be used in the unregulated branch while substantially cancelling the characteristic large output voltage ripple thereof.

Disclosed are processes for the conversion of isomerizable halogenated C2-C6 olefins from one geometric form to a more preferred geometric form. Preferred process aspects involve converting C2-C6 olefin in a cis-form to a trans-form under conditions effective to convert at least about 50 percent, and even more preferably at least about 70 percent, of the cis-form compound to the trans-form compound. In preferred embodiments the C2-C6 olefin comprises tetrafluoropropene, with cis-1,3,3,3 tetrafluoropropene (cis-HFO-1234ze) being converted, preferably at high conversion rates and high selectivity, to trans-1,3,3,3 tetrafluoropropene (trans-HFO-1234ze). In preferred embodiments the conditions effective to achieve the desired high levels of conversion and selectivity include exposing the feed to a metal based catalyst selected from the group consisting of halogentated metal oxides, Lewis acid metal halides, zero-valent metals, and combinations of these, preferably under reaction conditions, including reaction temperature and residence time, effective to convert at least about 5% of the cis-form of the compound to other compounds and to further achieve a selectivity to the trans-form of the compound of at least about 70%.

A folded-cascode operational amplifier including a differential input stage (19) and a class AB output stage (20) includes a first slew boost current mirror (13) and a second slew boost current mirror (14) having inputs connected to drains of the input transistors, respectively. Each current mirror amplifies excess tail current steered into it as a result of a large, rapid input signal transition. The amplified excess tail current is used to boost the slew rate of the class AB output stage. in accordance with a first polarity of the difference between the first (Vin+) and second (Vin−) input voltages. The drains of the input transistors are maintained at a voltage less than a transistor threshold voltage above the ground except during slewing operation of the operational amplifier to effectively isolate the current mirrors except during slewing operation.

The invention relates to the field of digital-analog hybrid integrated circuit design, aims to increase the conversion rate of a monoclinic ADC and provides the analog-digital converter which is simple in structure and low in power consumption. According to the adopted technical scheme of a low-power consumption level multi-reference voltage monoclinic analog-digital conversion method and a converter, the converter is composed of a ramp generator, a counter, comparators, multiplexer switches and a register; the ramp generator generates a ramp voltage Vramp and k reference voltages VrefK, wherein K=1, 2, 3..., K; each of the k reference voltages VrefK is supplied to the corresponding comparator through one of the corresponding multiplexer switches; the ramp voltage Vramp is supplied to each comparator. The low-power consumption level multi-reference voltage monoclinic analog-digital conversion method and the converter are mainly applied to digital-analog hybrid integrated circuit design.

A low-dropout (LDO) voltage regulator that includes an error amplifier which compares a reference voltage with a feedback voltage of an output voltage and outputs an error signal based on the result of the comparison, the error amplifier being biased by an input voltage; a first MOS transistor having a gate electrically connected to the error signal, a source electrically connected to the input voltage and a drain electrically connected to the output voltage; a voltage divider which transmits a predetermined part of the output voltage to the error amplifier as feedback voltage; and a level limiter which limits a level of the output voltage from changing beyond and below an offset voltage when a level of a load current changes. In accordance with embodiments, A predetermined number of comparators and MOS transistor type-switches are provided to enhance the slew ratio of the regulated output voltage and to reduce standby electricity consumption.

The present invention is an apparatus for testing a power supply. A power supply testing apparatus may include a remote load which may sink an adjustable amount of current with an adjustable slew rate and may test the response of the power supply to determine its operability with a dynamic load. Additionally, in an alternative embodiment of the invention, the testing apparatus may source an adjustable amount of current with an adjustable slew rate to the output of a power supply. In yet another embodiment of the invention, the testing apparatus may include an adjustable current sink and adjustable current source with an adjustable slew rate. The power supply testing apparatus of the present invention may be implemented with standard circuit components on a circuit board and thus provide a small form factor. Additionally, due to the small form factor and low weight implementation, the power supply testing apparatus may utilize reduced length test wires which reduce the inductance in the test wires and increases the apparatus' slew rate for more effective testing.

The invention discloses a new structure transformer, which belongs to the energy conversion installment. It completely avoids the welding, the big vice-side electric conduction area can realizes the output of the big electric current, the big cooling surface, the good radiation effect, the simple structure, the convenient service. The technical characteristic of the invention is that it includes the ferrite core, the primary side winding, vice-side, the vice-side is composed of left place body and the right place body, the left groove and the right groove separately opened on the left place body and the right place body, the left groove divides the left place body into the left stele and the left outside place body, the left stele and the left outside place body are connected in the base; the right groove divides the right place body into the right stele and the right outside place body, the right stele and the right outside place body are also connected in the base; the iron core placed in the groove, the primary side winding rolled around the iron core, the insulating layer has separately establishes between the primary side winding and the vice-side winding, between the primary side winding and the iron core.

The invention provides a catalyst special for O-alkylation production of aromatic ether and a method for producing aromatic ether. The catalyst is a supported catalyst, wherein transition metal or precious metal serves as an active component, a mixture of any one of ammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium phosphate and phosphoric acid and any one of potassium hydroxide, potassium carbonate, sodium hydroxide and sodium carbonate serves as an auxiliary, one or a mixture of an oxide carrier, clay and a molecular sieve serves as a carrier, the weight carrying amount of the active component is 0.1-5%, and the weight carrying amount of the auxiliary is 0.1-1%. The method comprises the steps that phenol and alkyl alcohol are catalyzed to react through the catalyst, wherein the mole ratio of phenol to alkyl alcohol in the raw materials is 1:(3-10), the catalyzing reaction is carried out in a gas-solid phase continuous flowing reaction device, and the catalyzing reaction temperature is 230-300 DEG C. The one-way service life of the catalyst reaches 3000 h or longer, and the problems that a catalyst used in the existing aromatic ether production process is short in service life, and consequently continuous industrial production of aromatic ether cannot be achieved are solved.

The present invention relates to the field of air purification materials, in particular to a preparation method for micro-nano silver loaded active carbon for eliminating formaldehyde for a long term under a room temperature condition. The present invention provides the preparation method for micro-nano silver loaded active carbon for eliminating formaldehyde for a long term under the room temperature condition. The preparation method comprises the following steps of active carbon washing, ammonia water impregnation modification and micro-nano silver loading. Compared with the prior art, the formaldehyde purification material provided by the present invention is prepared from the loaded micro-nano silver component by taking the active carbon washed by ultrapure water and treated by the ammonia water as a carrier; and by utilizing adsorption and reduction of the active carbon, catalytic oxidation performance of the micro-nano silver to the the formaldehyde and an enrichment conversion cooperation mechanism between the micro-nano silver and the active carbon, the micro-nano silver loaded active carbon is high in decomposition rate of catalyzing and oxidizing the formaldehyde and is stable in performance.

Methods and compositions for the generation of a peroxyacetic acid sanitizer in proximity to the point-of-use are disclosed. These methods comprise introducing a hydrogen peroxide-acetyl precursor solution to water, mixing, and then adding an aqueous source of a alkali metal or earth alkali metal hydroxide. Triacetin is a preferred acetyl precursor and is converted rapidly and with a high conversion rate into peracetic acid. These methods produce solutions with a high level of peracetic acid. Methods for preparing the hydrogen peroxide-acetyl precursor solution are also provided. Also disclosed are solid compositions comprising a liquid acetyl precursor, a water-soluble source of hydrogen peroxide, and a water-soluble source of alkalinity. The solid composition is a freely-flowable solid that is used as a bleaching agent and a stain remover for the treatment of articles such as fabrics, dentures, textile garments, and equipment used in the food and beverage industry.

The present invention achieves technical advantages as an operational amplifier (30) having both a high slew rate and a full power bandwidth with low distortion by providing resistors (R6, R7, R9, R10) in place of active loads coupled to a differential pair (Q22, Q25, and Q23, Q24) of transistors in a folded cascode input stage (34). By utilizing passive resistors instead of active loads, no saturation occurs during high slew rate signals. The present invention achieves technical advantages of higher slew rate and lower noise without sacrificing power consumption.

A dual mode transient recovery control method and system is proposed, which is designed for use with a direct-current (DC) power output unit, such as a DC-DC converter, for fast transient recovery of DC output power by switching the DC-DC converter to operate between a hysteretic mode and a PWM (Pulse Width Modulation) mode. The proposed control method and system is characterized by the use of a dual-threshold scheme to compare the output voltage. This feature may discharge the transient output voltage, raised by the over-shoot, to the steady state by switching to the discharging mode, and similarly charge the transient output voltage, dropped by the under-shoot, to the steady state by switching to the charging mode. This mechanism may allow DC-DC converters with higher slew rate to make transient ripples of output voltage to return to steady state more quickly, and additionally allow a better level of noise immunity.

The invention provides a low-temperature SCR (Selective Catalytic Reduction) denitration catalyst with a titanium-based core-shell structure and a preparation method of the catalyst. The titanium-based core-shell structure of the catalyst is formed by use of composite nanoparticles MnOx-CeO2 as the core and TiO2 as the shell and the size range of the catalyst is from 20nm to 200nm, wherein the molar ratio of the three elements Mn, Ce and Ti is (0.05-1): (0.05-1): 1. The preparation method of the catalyst mainly comprises the following steps: (1) mixing cerous nitrate with a manganese nitrate solution, dropwise adding a sodium hydroxide solution and then shifting the mixed solution to a hydrothermal kettle, and carrying out reacting, centrifuging, washing, drying and calcining to obtain the nanoparticles MnOx-CeO2; (2) preparing the nanoparticles with the core-shell structure in a reversed-phase microemulsion with CTAB (Cetyltrimethyl Ammonium Bromide) as a surfactant, n-amyl alcohol as a cosurfactant and cyclohexane as an oil phase. The low-temperature SCR denitration catalyst with a titanium-based core-shell structure has the advantages that the titanium-based core-shell structure is constructed for the first time, the center of the catalyst is protected by use of the TiO2 shell, and the probability that the active center contacts with SO2 in flue gas is reduced, and therefore, the active center is prevented from irreversible poisoning caused by erosion of SO2.

Disclosed is a source driver integrated circuit with an improved slew rate by disposing a switching unit, which operates as a resistance component during display driving, before the feedback line of an output buffer. According to the source driver integrated circuit with an improved slew rate, a switching unit, which operates as a resistance component when a signal is transferred, is disposed in the feedback loop of an output buffer, so that the resistance component is not shown to a panel load, thereby improving the slew rate of an output signal. In addition, the improved slew rate makes it possible to easily implement an image through a display.

A full-tensor, gravity gradient measuring system is disclosed that is based on atom interferometry. Each axis in the three-axis measuring system is served by a different gravity gradiometer, where each gradiometer comprises three pairs of atom interferometric (AI) accelerometers. The accelerometers in each pair are mounted on opposite sides of the gradiometer's rotation axis from each other. The three AI accelerometer pairs are step-rotated, instead of being continuously rotated, thereby providing enhanced signal-to-noise performance. The three gradiometers in the overall measuring system are mounted orthogonally with respect to one another on a local-level platform, in order to achieve a full-tensor measuring system. The measuring system can be step-rotated as an overall unit around an axis perpendicular to a local level reference. The multiple levels of stepped rotation, as enabled by the atom interferometry being utilized, yields improved results with lower costs than what is achievable with some prior-art techniques.

The invention relates to disorder place compensation circuit which is used for successive approximation type analog to digital converter, belongs to the digital-analog composite signal processing technology area, in the circuit the first inout end of the comparator outputs produce circuit and disorder place compensate produce circuit connects the first clock signal, the second input end of the comparator outputs produce circuit and disorder place compensate produce circuit connects the comparator compare result, the output of the comparator outputs produce circuit and disorder place compensate produce circuit separately corresponding connects the two input ends of the analog to digital converter output adjustment circuit, the clock input end of which connects the second clock signal, and lead out the output data signal and overflow signal of the analog to digital converter from the analog to digital converter output adjustment circuit. The set fuction of the circuit enhances transferring speed of the analog to digital converter, in the meantime, adjustes the output signal through increase compensation place and use the output adjustment circuit, eliminates the error by set in advance and produces the overflow signal.

The invention relates to a denitration method for a two-section microwave catalytic reaction bed. The method comprises the following steps: filling a catalyst in a reaction tube of a microwave catalytic reactor device, thereby forming a microwave catalytic reaction bed, and then generating a gas-solid reaction by use of a processed gas while passing by the microwave catalytic reaction bed, thereby performing the denitration treatment. The microwave catalytic reaction bed is composed of two independent microwave catalytic reaction beds which are mutually connected in series; Cu-HZSM-5 or Mn/MgFe2O4 catalyst is taken as the catalyst in a first section microwave catalytic reaction bed; activated carbon or activated carbon loaded MnO, CuO or CeO-CuO, MgO-FeOx, CeO-ZrO2 catalyst is taken as the catalyst in a second section microwave catalytic reaction bed; and the processed gas passes by the first and second section microwave catalytic reaction beds in turn and is subjected to a direct decomposition reaction and a selective reduction reaction in turn, thereby removing the nitric oxide. The denitration method has the advantages of being free from secondary pollution and corrosion, high in conversion rate, small in energy consumption, energy-saving, environmentally-friendly, low in running cost, and the like.

A method of using an apparatus, device or devices, such as a convergent divergent funnel, as a mixer for the feed material, to optimize the available reaction volume (ARV), the raw material feed ratios (R1:R2) and the weight hourly space velocity (WHSV), to produce organic compounds, in a tube reactor. These organic compounds include, but are not limited to: acids, aldehydes, amides, esters, ethers and ketones, which are useful as chemical, agricultural and pharmaceutical intermediates, pharmaceuticals, agricultural agents, herbicides, insecticides, pesticides, insect repellents, animal repellents, plasticizers, dye carriers and as flavor and/or fragrance ingredients.

The invention belongs to the field of solar energy development and utilization and particularly relates to a concentrating photovoltaic solar power generation and heating machine. The concentrating photovoltaic solar power generation and heating machine comprises a solar energy lens group condensation system, a power generation system, a heating system and a tracking system, wherein the solar energy lens group condensation system forms a lens group by a monomer convex lens through an array combination; the power generation system adopts an III-V group semiconductor cell capable of bearing condensing illumination with 1000 times, and thus generates the same electric energy relative to a crystal silicon chip by using few III-V group semiconductor cells; and the tracking system has a function of real-time and automatic tracking of the solar optical axis so as to obtain the maximum energy efficiency value of the solar energy. The problem of heat dissipation of the concentrating photovoltaic cells is a technical problem always puzzled in the industry. The invention adopts a technical scheme using water cooling heat dissipation, which can fundamentally solve the problem and reliably obtain the conversion energy of two kinds of solar energy, namely power generation and heat supply, as well as change the final conclusion that you can't have your cake and eat it.

The invention provides a linear motor driver which comprises a current feedback loop module, a power module, a detecting module, and a state analysis and control module. The motor driver is characterized in that the current feedback loop module comprises a preposing input stage module, an adder module, a low pass filter module, a power amplification feedback module, a loading module, a current sampling amplification module and a gain adjustment module which are connected in sequence; and the output signal of the gain adjustment module is connected on the input end of the adder module finally, thus forming a loop. The linear motor driver has the characteristics of high linearity, wide bandwidth, good stability, small interference to outside, and strong capacity of resisting disturbance, and is small in volume and low in cost. As the temperature coefficient of the drain-source resistance of the power amplifier is positive, when the temperature of the power amplifier rises, the current is limited, therefore, no thermal breakdown occurs, and consequently, no secondary breakdown occurs.

The invention provides an on-board monitoring and diagnosis device based on OBD-II (On-Board Diagnostics-II), which is applicable to an on-board diagnostic protocol (KWP (Keyword Protocol) 2000). The on-board monitoring and diagnosis device comprises a USB (Universal Serial Bus) serial port module, a serial-to-K-line module and an OBD-II connecting line, whererin, the USB serial port module comprises a USB-serial UART (Universal Asynchronous Receiver/Transmitter) interface chip FT232R, and the serial-to-K-line module comprises a single-ended bus transceiver. The on-board monitoring and diagnosis device based on the OBD-II provided by the invention has the advantages of small volume, high conversion rate, plug and play function, protability and strong operability, and can be fully controlled by a host.

The present invention relates to a composite of cerium, zirconium and samarium components, a catalyst composition containing such composite and the use of the catalyst composition for the treatment of a gas stream to reduce contaminants contained therein. The catalyst composition has the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides.

The invention provides a catalyst represented in a chemical formula CuaGabMcOx (1) using 1,4-butanediol to prepare [gamma]-butyrolactone, wherein M stands for one or more than one metal elements except Cu and Ga. The constitution of the elements referred hereby as a:b:c is 1:0.01-15:0-10 and x represents a chemical variable determined by the constitutional valences of the other elements. More technically, with the introduction of the catalyst represents by the chemical formula (1), the reaction takes place to dehydrogenize 1,4-butanediol in gaseous phase at temperatures ranging from 150 degrees to 300 degrees and under reaction pressures of from zero to 10kg/cm2G.

The invention relates to a preparation method of a graphene oxide and quinone compound co-modified hydroxyl-containing macroporous foam carrier and belongs to the technical field of water treatment in environmental engineering. The preparation method comprises the following steps: preparing a graphene oxide modified polyurethane foam composite material from a hydroxyl-containing macroporous foam material at the room temperature by virtue of a physical adsorption method, and aminating the composite material until graphene oxide and polyurethane foam contain a certain amount of primary amine; and reacting by virtue of an anthraquinone compound containing sulfonyl chloride groups with primary amine, so as to fix a quinone compound, wherein the hydroxyl-containing macroporous foam material can be polyvinyl alcohol foam or polyvinyl alcohol doped polyurethane foam and the like. According to the preparation method, the quinone compound and graphene oxide are simultaneously fixed to the surface of the macroporous foam material, so that the contact among a redox mediator, graphene and microorganisms is facilitated; and the technical bottlenecks that graphene and the water soluble quinone compound in a water treatment system are difficult to be recycled and flow out along with water to cause secondary pollution are solved.

The invention discloses a business opportunity mining method based on an enterprise portrait, and the method comprises the steps: obtaining structured, semi-structured and unstructured mass data through Internet data and enterprise basic data, carrying out the preprocessing of the data, and forming an enterprise service data center on the basis of the data; dynamically matching deduplication and user basic information through a system to form a unique ID of the whole network of the user; integrating and cleaning the data of each dimension of the enterprise, and binding the data with the uniqueID of the enterprise to form a portrait system; carrying out model training through multi-dimensional enterprise portraits and enterprise historical order data, and improving the user conversion rateand the repurchase rate; enabling different portraits to correspond to different recommendation rules, pushing proper products to enterprises in time, and pushing business opportunities to matched business personnel through an intelligent matching algorithm; obtaining sales feedback data in time through buried points, and building a business opportunity mining evaluation model; and performing secondary optimization on the business opportunity mining model in combination with results of machine learning and business personnel feedback information.

The invention discloses double-sided coated glass applied to visible light and near-infrared light bands and a production process of the double-sided coated glass. The double-sided coated glass comprises a glass substrate, wherein the front face and back face of the glass substrate are coated with AR anti-reflection nano composite layers. The production process comprises the steps that the glass substrate is prepared, and the front face and back face of the glass substrate are coated with the AR anti-reflection nano composite layers by utilizing sputtering coating equipment. The double-sided coated glass applied to the visible light and near-infrared light bands and the production process of the double-sided coated glass have the advantages that membrane thickness overlay is completed at atime by using the sputtering coating equipment, and an anti-reflection effect is achieved in 500-1200-nanometer visible light and near-infrared light bands separately.

The invention provides a low-dropout linear regulator. A turnover source voltage follower serves as an error amplification circuit in a loop and can induct changes of output voltage of a power output tube drain, when the output voltage changes, the error amplification circuit will provide corresponding error voltage to control a power tube grid driving circuit, the power tube grid driving circuit has the effect of increasing grid charging speed or discharging speed of a power output tube according to the error voltage to improve the converting speed of the power output tube, and the grid driving capacity of the power output tube is improved; as output resistance of the power tube grid driving circuit is extremely low, the power tube grid driving circuit can push a pole of a power output tube grid to a position with higher frequency, and a main pole of the loop is located at an output pole. The low-dropout linear regulator has fast transient response, stable loop bandwidth is provided by a simple compensation technology, and no ESR limit exists in off-chip capacitor selection.

Novel flat plate solar panels are disclosed, which, using low profile multiple axes tracking, keep the surface of each flat plate panel upon which rays of the sun are impinged essentially perpendicular to those rays enabling a higher rate of conversion to electrical energy and a long interval each day during which conversion of sunlight to electricity is accommodated. Side peripheral sunlight deflectors redirect rays of sunlight perpendicular to the face fo the flat plate panel but directly adjacent to and somewhat out of alignment with the impingement surface of the flat plate panels upon the impingement surfaces thereby concentrating a greater amount of sunlight to produce a greater quantity of electricity. A cooling system for the flat plate panels, using circulated fluid is disclosed whereby the thermal energy so obtained may be used to perform work to make the system more cost effective.

The invention discloses a driving circuit system and a method of elevating a slew rate of an operational amplifier. The driving circuit system comprises an operational amplifier, a judging module and a bias enhancing module. The operational amplifier has an input stage driven by a bias current. The bias enhancing module is electrically connected to the judging module and the input stage of the operational amplifier respectively. The judging module is used to generate a bias enhancing signal according to an edge-trigger of a control signal. When the bias enhancing module receives the bias enhancing signal, the bias enhancing module provides an additional current, which cooperates with the bias current, for driving the input stage of the operational amplifier, so as to elevating a slew rate of the operational amplifier.

The invention provides a vanadium-titanium magnetite treatment method. The vanadium-titanium magnetite treatment method comprises the following steps that rough vanadium-titanium magnetite is subjected to mineral separation, and vanadium-titanium magnetite concentrate is obtained; the vanadium-titanium magnetite concentrate and coal are mixed and then directly added into a rotary kiln to be prereduced, and calcine and rotary kiln smoke are obtained; the calcine is transferred into an electric furnace to be subjected to reduction smelting, and vanadium containing molten iron, titanium slag andelectric furnace smoke are obtained; and the vanadium containing molten iron is transferred into a converter to be subjected to converting, and vanadium slag and semisteel are obtained. According to the vanadium-titanium magnetite treatment method provided by the embodiment of the invention, the vanadium-titanium magnetite concentrate is subjected to the treatment processes including rotary kiln prereduction, electric furnace reduction smelting and converter converting, thus, the metallization rate of the obtained calcine is high, the content of iron and vanadium in the titanium slag is low, valuable metal elements are sufficiently utilized, the high-grade vanadium slag and the high-grade semisteel are obtained, the foundation is laid for follow-up processing of the iron element and the vanadium element, the technological process is short, the production energy consumption can be decreased, environmental pollution is reduced, and the investment cost and production cost are reduced.