243 results about "Control synthesis" patented technology

The present invention provides a method and apparatus for the controlled synthesis of nanoparticles using a high temperature process. The reactor chamber includes a high temperature gas heated by means such as a plasma torch, and a reaction chamber. The homogenizer includes a region between the reactant inlets and the plasma (the spacer zone) to ensure that feeds from the reactant inlets are downstream of the recirculation zone induced by the high temperature gas. It also includes a region downstream of the reactant inlets that provides a nearly I dimensional (varying only in the axial direction) flow and concentration profile in the reaction zone to produce nanoparticles with narrow size distribution.

Monodisperse core-shell types of metal, metal oxide, and alloy nanoparticles with variable core diameters and shell thicknesses, and controlled synthesis methods for producing such nanoparticles are provided. Nanocomposite materials fabricated from nanoparticles, and methods for producing such nanocomposite materials are also provided.

Monodisperse core-shell types of metal, metal oxide, and alloy nanoparticles with variable core diameters and shell thicknesses, and controlled synthesis methods for producing such nanoparticles are provided. Nanocomposite materials fabricated from nanoparticles, and methods for producing such nanocomposite materials are also provided.

A process for producing GNP-based polymeric nanocomposites for electromagnetic applications such as shielding and / or absorption of the energy associated to electromagnetic fields envisages a plurality of steps that include: controlled synthesis, for optimizing the morphological and electrical properties thereof, of graphene nanoplatelets (GNPs) to be used as nanofillers in a polymeric matrix; selection of the polymeric matrix so as to optimize its chemical compatibility with the type of GNPs thus obtained; production via the solution-processing technique of GNP-based polymeric nanocomposites with dielectric permittivity and electric conductivity controlled and predictable via the equivalent-effective-medium model by calibrating the parameters of the model for the specific type of polymeric matrix and GNPs used.

The invention discloses a direct vertical deposition method of a zinc oxide nanometer rod array on a titanium dioxide film, wherein the zinc oxide is an important inorganic semiconductor function material and arouses wide public concern due to the unique performances of catalysis, electricity, optics and photochemistry, and the like. Persons are interested in the control synthesis of one-dimensional zinc oxide due to the remarkable laser behavior of the one-dimensional zinc oxide. The method comprises the steps of: preparing titanium dioxide sol under room temperature; preprocessing; adhering with one layer of titanium dioxide sol on a preprocessed glass or an electric glass ITO by means of dipping and pulling; preprocessing titanium dioxide grains before drying and spinning; fixing a layer of titanium dioxide grains prepared by means of a sol-hydrothermal method on the substrate by means of spinning; drying; roasting to obtain the nanometer zinc oxide film; putting the zinc oxide film into a sealed water solution system of zinc salt and organic amine; reacting for 12-72 h under the reaction temperature of 45-90 DEG C; taking out; washing with secondary water; and drying. The invention relates to a nanometer material.

The invention provides mordenite and a preparation method thereof. The mordenite has an ellipsoidal structural topography formed by stacking a plurality of strip zeolite crystals in the one-dimensional direction in order; and the method for preparing the mordenite with the special structural topography comprises that: a solid silicon-aluminum source raw material is subjected to two-stage crystallization reaction in an extremely thick system, the molar ratio of water to silicon dioxide in the crystallization system is 1-7, the structural topography of the obtained mordenite is obviously difference from that of the conventional product by optimizing and controlling synthesis process and condition parameters, and mesopores and macropores are introduced into the mordenite structure to contribute to solving the problems of dislocation and surface defects of the mordenite structure and better contribute to improving the catalytic performance in xylene isomerization reaction. The invention also provides application of the mordenite with the special structural topography to catalysis in the xylene isomerization reaction.

A systematic procedure for the synthesis of hybrid feedforward control architectures for pulse-width modulated (PWM) switching converters is provided. In this hybrid feedforward control architecture selected converter variables are sensed and utilized in a particular way based on the converter open-loop characteristics to determine the duty-cycle needed to achieve a control objective. Compared to standard feedback control techniques, advantages can include simpler controller implementation, more convenient sensing, and improved static and dynamic regulation. An example systematic procedure for developing hybrid feedforward controllers is illustrated by first considering a previously known example of hybrid feedforward control: hybrid feedforward control of a boost power factor correction (PFC) rectifier operating in discontinuous conduction mode (DCM). The hybrid feedforward control synthesis principles are also used to realize new hybrid feedforward control architectures, such as a four switch buck boost converter.

The invention discloses a technology for controlled synthesis of polylactic acid through a lactide active ring-opening polymerization reaction under the catalytic action of organic guanidine-nontoxic alcohol serving as a catalyst. According to the technology, nontoxic organic RCOOCG is adopted as the catalyst, nontoxic organic alcohol is adopted as an initiating agent, and the lactide active ring-opening polymerization reaction is performed according to a noumenon fusion and polymerization method. The technology is characterized in that the catalyst activity is high; the temperature of the polymerization reaction is low; the reaction time is short; a polymer product, namely polylactic acid, can be subjected to controlled synthesis within a range (Mn: 0.5*10<4>-5.0*10<4>) of the actual application requirement for the number-average molecular weight; the molecular weight distribution of the polymer product is narrow (PDI: 1.10-1.25); no monomer is remained in the polymer product (monomer conversion rate: 100%); the polymer product is snow-white in color and high in biological safety.

Embodiments are presented herein that provide a TMD system wherein the first layered material is made of heterobilayers or multilayers with semiconducting direct band gaps. The first layered material may be made of multiple layers of different TMD with different stackings, exhibiting smaller direct and indirect band gaps smaller than monolayer systems of TMD.

The present invention relates to a modularized semi-physical simulation system of a spacecraft orbit attitude. The modularized semi-physical simulation system of the spacecraft orbit attitude comprises a work control machine, a space mission load simulator, a real time simulator and an orbit attitude control comprehensive treatment system. LabVIEW and Veristand software are installed and operated on the work control machine, and development of a user-defined module oriented to the spacecraft orbit attitude is performed through the LabVIEW software; the developed user-defined module is deployed in the real time simulator through the Veristand software, and the association of input or output data among modules is completed; data acquisition and sending are completed by operating the real time simulator; and aiming at the mission load of the space mission load simulator and the engineering requirement of the semi-physical simulation, the orbit attitude control comprehensive treatment system (6) is configured to resolve the controlled quantity of the orbit and the attitude according to received real time data. The modularized semi-physical simulation system of a spacecraft orbit attitude has high simulation real time, high modularity and high integration level, and is applicable to semi-physical simulation oriented to a spacecraft orbit attitude.

A method for the synthesis and manufacture of metal nanoparticles using metal inorganic salts. The method is simple and uses inexpensive chemicals. The procedure produces nanometals in 100% yields. Method is scalable and produces nanoparticles in unlimited quantities. In this method, a metal inorganic salt is dissolved in a reaction medium, comprised of a solvent and organic amine to create a metal / amine complex. A reducing agent, comprised of a solvent and Sodium Borohydride (NaBH4), is then mixed with the metal / amine complex through titration or through a continuous flow process. The resulting nanoparticles are then precipitated through the addition of methanol and centrifugation and decanted. The decanted nanoparticles can then be suspended in a solvent for storage.

A controlling system of the dynamic matrix for the air separation tower, it includes the local intelligent meter which connects to the tower, data storage device for the history of the data, and the position machine. The intellective meter, data storage device and position machine connect to each other in sequence. The talked position machine is the controlling machine for the dynamic matrix which consists of the controlling part of the ingredient judging and dynamic matrix. The ingredient judging part includes the module of the testing meter, I / O element module and ingredient judging module. The dynamic matrix includes I / O element module, forecasting model module, feedback revising module, rotating optimizing module and output controlling module. It also provides a controlling method for the realization of the dynamic matrix controlling for the tower. This invention can be suitable to the dynamic characteristic, strongly non linear and coupling of the circuit for the air separation, and the integrated controlling effectiveness is good.

The invention belongs to the technical fields of nano materials and natural macromolecular materials and particularly relates to a fibroin-controlled alpha type ferric oxide nano material and a preparation method thereof. The alpha type ferric oxide nano material is nearly cuboidal, spherical or olivary and is 10 to 1,000 nm in size. The fibroin serving as a template is directly used for controlling synthesis of the nano material; and particularly, the alpha type ferric oxide nano material is prepared by adding ferric oxide into a fibroin solution through hydrothermal reaction and operation such as cooling, centrifuging, washing, drying and the like. The size and the shape of the alpha type ferric oxide nano material can be controlled by changing the fibroin content and the ferric oxide content. The alpha type ferric oxide nano material prepared by using natural protein as the template is simple in preparation process and environment-friendly, saves energy and has high efficiency. The size and the shape of the product can be controlled.

The invention relates to a mobile terminal calibration method which is used for AGC (automatic gain control) calibration and APC (automatic power control) calibration of a mobile terminal. The method includes: controlling a comprehensive test instrument and the mobile terminal to be synchronous through a console; after synchronization is completed, sending a first communication signal by means of a series of designated APC control words and a series of frequency points at a first designated time slot on the mobile terminal according to setup of the console; measuring signal intensity of a second received communication signal by means of a series of designated AGC control words and a series of frequency points at a second designated time slot; synchronously measuring the power of the second communication signal of multiple power levels at the second designated time slot and frequency points on the instrument according to setup of the console and measuring the power of the first communication signal sent to the mobile terminal at the first designated time slot and frequency points; and calculating and judging on the console according to measurement values fed back by the instrument and the mobile terminal and outputting final results to the mobile terminal for storage.

The invention relates to a light-driven regulation preparation method and electrocatalysis activity of a nanometer material. According to the present invention, a light-driven in situ nucleation method is adopted to regulate the average particle size of metal and alloy nanometer materials and the uniformity of particle size distribution, and modulate an illumination time, an illumination intensity, light source types, metal macrocyclic compound concentration and metal precursor concentration so as to achieve optically controlled synthesis of metal and alloy nanometer materials. The method of the present invention has characteristics of light controlling, simple operation, mild conditions, environment-friendliness, and easy amplification synthesis. The spherical branched platinum nanometer material prepared by the light controlled method of the present invention has a high electrochemical activity specific surface area, shows excellent electrocatalysis activity in an oxygen reduction reaction, and provides excellent electrocatalysis activity for methanol electrocatalysis oxidation reaction.

The invention discloses a preparation method of a ZIF-8-derived N,S-co-doped non-metallic carbon-based nano-oxygen reduction electrocatalyst. According to the preparation method disclosed by the invention, a uniform ZIF-8 precursor is synthesized by controlling synthesis conditions of crystals; then ZIF-8 is mixed with sulfur-containing small molecules through a solvent to form a uniformly dispersed mixed material; and finally high-temperature carbonization is performed in a tubular furnace to obtain a black powder carbon material, and without further post-treatment, ZIF-8-derived N,S-co-dopednon-metallic carbon-based nano-oxygen reduction electrocatalyst is obtained. Due to the uniform size of ZIF-8 and the volatility of Zn, a uniform thin-layer shell-like graphite carbon material is formed. The electrocatalyst has the structural characteristics of large specific surface area and S and N co-doping; and in the carbonization process, a part of Zn and S form semiconductor ZnS crystals with relatively high conductivity, so that the material has relatively high electrocatalytic performance.

The invention discloses a novel wheat gene TaMYB7D capable of adjusting and controlling the synthesis and the metabolism of anthocyanin, and belongs to the field of plant genetic engineering, wherein the novel wheat gene TaMYB7D is obtained through separation of the purple-grain wheat variety highland 115. The TaMYB7D is located on a wheat chromosome 7D, and a protein product subcell is located in a cell nucleus. A deduced amino acid sequence shows that TaMYB3 encodes an MYB transcription factor capable of adjusting and controlling the synthesis and the metabolism of anthocyanin. The expression quantity of the TaMYB7D in the coleoptiles of a purple wheat variety highland 115 grain can be increased under the induction of light. During transient expression, the TaMYB7D and the pericarpic cell of the highland 115 grain synthetize anthocyanin. Moreover, coseparation occurs between the color of the coleoptiles of the highland 115 grain and the expression of the TaMYB-7D, that is, the TaMYB7D has transcriptional activity used for adjusting and controlling the synthesis and the metabolism of anthocyanin, and is the major gene of the purple coleoptiles of the TaMYB7D highland 115 grain.

The invention discloses a method for preparing small-particle-size cerium-activated yttrium aluminum garnet (YAG) florescent powder. According to the method, first, in fused salt, a wrapping structure of nanometer yttrium oxide (cerium oxide) @ aluminum oxide particles is obtained through controlled synthesis, then the aggregate of small-particle YAG florescent powder particles is generated through reaction in high-temperature fused salt, and finally the small-particle-size YAG: Ce florescent powder is obtained through weak ball milling. It is avoided that in the reaction process, the aluminum oxide particles and intermediate-phase particles abnormally grow, and while the high crystallinity of the particles is kept, final YAG is effectively controlled; the particle size of the Ce florescent powder has important significance for improving light-color quality of white-light LEDs, lowering the complexity of a white-light LED packaging technology and increasing the yield.

The invention discloses a defect-site-rich titanium-dioxide-and-graphene composite nanometer photocatalyst and a preparing method for a carbon-nanometer-tube-and-graphene composite carbon material. The solvent thermal method is adopted, an alcohol serves as a solvent, hydroboron serves as a reducing agent and a precipitating agent, titanium tetrachloride or tetrabutyl titanate serves as a titanium source, the high-dispersion titanium-dioxide-and-graphene nanometer catalyst is prepared with the one-step method, and control synthesis of titanium dioxide nanometer particles and defect sites is achieved; then methane serves as a carbon source, and the carbon-nanometer-tube-and-graphene composite carbon material is prepared with the chemical vapor deposition method. According to the preparing method, using of precious metal is avoided, and the catalyst prepared with the method is low in cost, and is hopefully used for preparing a carbon nanometer tube and a graphene carbon-nanometer-tube composite material in a large-scale mode.

The invention discloses a method for preparing small-particle-size cobalt carbonate, which comprises the following steps: preparing solution A with a cobalt slat concentration of 0.1 to 10M and an additive concentration of 0.05 to 5M by dissolving an industrial cobalt salt and an additive in deionized water; preparing solution B with a precipitator concentration of 0.1 to 10M and a complexing agent concentration of 0.05 to 5M by dissolving an industrial precipitator and a complexing agent in deionized water; filling deionized water which accounts for 1 / 10 to 3 / 10 of the volume of the reactor into the reactor, filling the solution A and the solution B into the reactor according to a volume ratio of 1:1 to 1:5 to perform a precipitation reaction, controlling the pH value to be 6 to 10, and reacting for 4 to 10 hours; and overflowing the precipitator formed by the reaction into a washing and filtering device, washing the precipitator till the pH value of the washing water is between 6.5 and 7.5, filtering, and drying the filter cake in an oven at 80 to 120 DEG C for 2 to 10 hours to obtain small-particle-size cobalt carbonate powder. In the invention, the small-particle-size cobalt carbonate powder prepared by a controlled synthesis process has high flowability, small particle size, uniform particle size distribution, and large specific surface area and makes the realization of industrial production easy.

The invention provides a transcription factor Csa5G157230 participating in regulation of synthesis of cucumber cucurbitacine C and application thereof. The transcription factor is one of two bHLH transcription factors (Csa5G157230 and Csa5G156220) which are found in cucumber genome firstly and used for controlling synthesis of bitter taste; the two bHLH transcription factors are used for controlling the forming of the bitter taste in fruits and leaves respectively; simple crossing of yeast, a gel tissue system and instantaneous expression of tobacco prove that the two transcription factors can be combined to a bitter taste synthesis promoter region and used for activating transcription of a synthesis gene; meanwhile, the bitter taste characteristics of cucumber plants can be restored by expressing the corresponding transcription factors in the leaves or fruits of the cucumber free of bitter taste abundantly. The invention further discloses a molecular mechanism for forming bitter taste of cucumber and provides theoretical basis for breeding cucumber free of bitter taste and molecular assisted breeding goals.

The invention belongs to the field of inorganic nanomaterials, and involves a preparation method for sulfur compounds of lead nanomaterial by calixarene in a specific thermal control system solvent. Said method comprises placing lead salt and calixarene in a container, using toluene as solvent, stirring at 70-90DEG C for 0.8-1.5 hours to obtain a mixture, transferring the mixture into a reactor and adding sulfur source, adding toluene to 3 / 5-4 / 5 of the reactor volume and sealing, reacting at 150-200DEG C for 18-30 hours and cooling to room temperature, washing, separating, and drying to obtain the final product. The molar ratio of sulfur source to lead salt is 1 : 1, wherein the lead salt is one of lead nitrate and lead acetate and sulfur source is one of thiourea, sulfur powders, and selenium powders. The raw materials of this invention are easy to get and cheap. This invention also has the advantages of simple operation and equipment, high purity, convenient treatment, and being easy for industrialization. This invention provides a new method for preparing nanomaterials by controlled synthesis.

Method and system for controlled nanodiamond synthesis based on treating of a specially prepared solid carbon source target including carbon containing material in liquid media by irradiation energy beam focused at a predetermined distance from the target surface and having parameters to produce a light-hydraulic effect impacting the target surface and leading to the forming of diamond nanocrystals.

The invention discloses a solvent thermal induction control synthesis method for nano molybdate with a scheelite structure, which comprises the following steps: shifting molybdenum source solution and an oily solvent in an oil-water ratio of 0-3 to 1 respectively, slowly adding solution of bivalent metal ion salt into the solution while ultrasonic treatment, transferring the solution into a stainless steel autoclave, ensuring the volume of the reaction solution to be two thirds that of the autoclave, sealing the autoclave and then putting the autoclave into an oven at the temperature of between 120 and 200 DEG C, and heating the solution for 0.5 to 10 hours and then closing the oven; and cooling the solution to the room temperature and taking the solution out, and washing the settlement product with distilled water, acetone and anhydrous ethanol in turn after the supernatant liquid is absorbed, wherein the obtained product is a nano molybdate material in a fishbone, flower cluster, batten or granule shape with superior optical and electric performance. The method has the advantages of available raw materials, simple and feasible method, simple used instrument and equipment, high purity of the product, easily controlled appearance and structure of the product, convenient post treatment of the product, and contribution for industrialized operation.

The invention discloses a preparation method and application of a petaloid metal organic framework material. Specifically, a hydrothermal method is adopted to control synthesis raw materials and a hydrothermal time so that the petaloid-morphology ZIF-67 material is synthesizd, and the synthesized petaloid-morphology ZIF-67 material is adopted as a positive electrode catalyst material for an oxygenevolution reaction so as to study application of the synthesized material in the oxygen evolution reaction. The ZIF-67 material is obtained through self-assembly of an organic ligand 2-methylimidazole, cobalt nitrate and a Fe2Co metal cluster salt in a methanol solvent system, and meanwhile on the basis of the synthesis, the reaction time is changed so as to regulate the morphology and convert the dodecahedron morphology into the petaloid morphology; and when the synthesized material is assembled into a three-electrode system for an oxygen evolution performance test, it is found through dataanalysis that the petaloid ZIF-67 material has better oxygen evolution performance than the ZIF-67 material with a dodecahedron morphology.

The invention provides a preparation method of metal-doped indium sulfide nanosheets. The preparation method comprises the steps that S1, indium salt, metal-doped salt and dialkyldithiocarbamate saltare mixed and reacted in an organic solvent to obtain a precursor complex; S2, the precursor complex is heated and reacted in an amine solvent to obtain the metal-doped indium sulfide nanosheets. Compared with the prior art, metal doping is introduced into the indium sulfide nanosheets by controlling synthesis and thermal decomposition of a precursor, the preparation process is simple and easy, massive nanosheets can be prepared, the precursor ratio can be controlled, and the concentration of doped ions can be precisely adjusted. The introduced ions have universality, the nanosheets are uniform in thickness and high in dispersibility, and the catalytic activity of the nanosheets in electroreduction of carbon dioxide is improved. By means of the method, the manganese-doped nanosheets are prepared, and moreover, the nanosheets doped with other ions can be massively prepared, and the preparation method is wide in application prospect.

The invention discloses a method for regulating and controlling synthesis of an extracellular polymeric substance of clostridium acetobutylicum. The method is characterized in that an intron sequence is interpolated into a gene Spo0A of the clostridium acetobutylicum by using a type II intron gene knockout technology. The invention provides a simple and efficient method for regulating and controlling EPS (Extracellular Polymeric Substance) synthesis; a recombinant strain obtained based on the method is relatively good in regulating and controlling effect on the EPS; in case of taking glucose as a carbon source, when cultivated in an anaerobic bottle with the volume of 100 ml by using a slide biomembrane cultivation method, a clostisdium acetobutylicum biomembrane is 5.81 mum in thickness, and the thickness of a strain biomembrane cultivated under the same condition is 24.6 mum.

The present invention provides a method, apparatus, storage medium and device for controlled synthesis of inhomogeneous textures, which relates to the field of texture synthesis technique in image processing. The method includes: obtaining an input texture exemplar from user, and analyzing the features of the exemplar, so as to extract the source guidance channels; herein the guidance channels comprise a progression map and an orientation field of the texture exemplar; obtaining a progression map and an orientation field from the user specified target, which are used as the target guidance channels; comparing the differences between the source guidance channels and the target guidance channels, so as to form the progression constraint and orientation constraint; determining the distance measure between the texture exemplar and target image, and adding the progression constraint and orientation constraint into the distance measure; the target image produced by minimizing the sum of distances over all patches with the constrained distance measure, is the final output of controlled synthesis.

The present invention relates to a prostatic comprehensive therapeutic equipment. Said prostatic comprehensive therapeutic equipment includes the following several portions: microcomputer controller, comprehensive therapeutic head, printing machine, music and video playback device. Besides, said invention also provides its working principle and concrete operation method.