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47results about How to "Close interaction" patented technology

Cell co-culture method for inducing bone mesenchymal stem cells to differentiate into osteoblast

The invention provides a method for inducing bone mesenchymal stem cells to differentiate into osteoblast. The method is characterized in that little osteoblast is added in a bone mesenchymal stem cell culture system to form an osteogenesis micro-environment; the quantity of the osteoblast is more than 30% of the total cell quantity preferably. The method firstly uses the osteogenesis micro-environment provided by little osteoblast, induces the BMSCs to form mature bone tissue in vitro by a co-culture method and has a wide prospect in the field of bone tissue restoration and reconstruction.
Owner:JINAN UNIVERSITY

Low-temperature in-situ growing method of semiconducting metal oxide with nano-structure as well as application

The invention discloses a low-temperature in-situ growing method of a semiconducting metal oxide with a nano-structure as well as an application. According to the method, polymeric nanofibers containing an inorganic salt solution are deposited on a substrate with an electrospinning method, and then are subjected to hydro-thermal treatment, so that inorganic salt contained in the polymeric nanofibers is converted into the semiconducting metal oxide with the nano-structure in situ, and the semiconducting metal oxide is tightly combined with the substrate. The method has the advantages as follows: equipment is simple, steps are simple and convenient, the energy consumption is low, high-temperature thermal treatment is not required, a semiconducting metal oxide nano material is obtained on different substrates in situ at the relatively low temperature lower than 180 DEG C and the like; the method can be used for preparation of a flexible semiconducting metal oxide device with polymer as the substrate, further realizes good composition of the semiconducting metal oxide nano material and organic polymer conveniently, can be used for preparation of organic / semiconducting metal oxide nanocomposite materials and devices, and has a good application prospect in the field of nano photoelectric devices.
Owner:ZHEJIANG UNIV

Operation control-oriented adaptive modular power grid security pre-warning evaluation method

The invention discloses an operation control-oriented adaptive modular power grid security pre-warning evaluation method. The method comprises the following steps: building an AC / DC hybrid power grid stability evaluation index system and forming a security pre-warning evaluation module, and determining the initial module index composition based on a Delphi expert meeting mechanism and expert experience; getting an index evaluation result sequence of the stability evaluation index system and an evaluation result sequence of the security pre-warning evaluation module; acquiring the correlation between the module evaluation result sequence and all index calculation result sequences based on a gray correlation analysis method; if the indexes of which the correlation exceeds a threshold are different from the original indexes of the security pre-warning evaluation module in composition, selecting the high-correlation indexes to update the security pre-warning evaluation module; or, fusing the subjective weight and objective weight of each index in the security pre-warning evaluation module based on a minimum distance model to get a comprehensive weight, and finally, getting the comprehensive evaluation result of the security pre-warning evaluation module, and issuing power grid security pre-warning.
Owner:CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +2

Nitrogen-doped carbon-coated Ru nano-catalyst and application thereof in electrochemical deuterium evolution reaction

The invention discloses a nitrogen-doped carbon-coated Ru nano-catalyst and application thereof in electrochemical deuterium evolution reaction, the catalyst is of a core-shell structure, a catalyst shell layer is a nitrogen-doped porous carbon material, and a catalyst core layer is ruthenium nanoparticles; and the preparation method of the catalyst comprises the following steps: grinding and uniformly mixing organic nitride, organic carbide, A pore-foaming agent and ruthenium salt in a mortar, calcining at high temperature in a nitrogen atmosphere, taking out the calcined product, and uniformly grinding to obtain the final catalyst. According to the nitrogen-doped carbon-coated Ru nano-catalyst, a carbon-coated structure is formed by doping nitrogen and ruthenium, the nitrogen-doped porous carbon structure can form good coordination with Ru metal, the charge structure between the nitrogen-doped porous carbon structure and the Ru metal is changed, and the active sites are increased, sothat the deuterium production reaction performance of the catalyst pair is improved. The preparation process of the catalyst is completed in one step, deuterium gas can be rapidly generated, and thecatalyst has good stability and wide application prospect.
Owner:ZHEJIANG UNIV OF TECH

A hollow structure silicon-carbon composite electrode material and a preparation method thereof

The invention discloses a hollow structure silicon-carbon composite electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, dispersing nano silicon particles into an organic solvent, adding a coupling agent and adjusting the pH value to 3-4, washing and drying to obtain modified nano silicon particles; S2, respectively arrange an aqueous phasesolution and an oil phase solution, dispersing that modify nano-silicon particles of the step S1 into the oil phase solution, adding the modified nano-silicon particle into the aqueous phase solution, adding an initiator, centrifuging, washing, and drying to obtain a composite material coated with a layer of polymer on the nano-silicon particles; S3: adding the composite material of the step S2 into Tris buffer solution, adding dopamine hydrochloride, centrifuging, filtering, and drying to obtain the composite material coated with the double-layer polymer on the nano silicon particles; S4: The composite material of step S3 is carbonized to obtain a silicon-carbon composite electrode material. The invention has the advantages of simple process, environment friendliness, uniform polymer coating, stable structure, and excellent electrochemical performance of the prepared silicon-carbon composite electrode material.
Owner:深圳市清新电源研究院

Preparation method of platinum tin silicon dioxide catalyst for hydrogenation production of ethyl alcohol using acetic acid

The invention relates to a preparation method of a platinum tin silicon dioxide catalyst for hydrogenation production of ethyl alcohol using acetic acid. The preparation method comprises the following steps: dissolving tin-containing salt and ethyl orthosilicate in ethyl alcohol and dropwise adding deionized water while stirring, thereby acquiring a SnOx-SiO2 compound oxide; adding an ammonia solution, and then adding a platinammine-containing aqueous solution; grinding the acquired solid into powder and forming, thereby acquiring the platinum tin silicon dioxide catalyst for the hydrogenation production of ethyl alcohol using acetic acid. According to the invention, a sol-gel method and an ion exchange method are combined for modifying the loading mode of Pt and Sn, the dispersity of Pt and Sn and the interaction degree of Pt and Sn are promoted, the PtSn catalyst with excellent performance is acquired and the efficiency of hydrogenation production of ethyl alcohol using acetic acid is increased. Compared with the catalyst used in the existing technique of hydrogenation production of ethyl alcohol using acetic acid, the catalyst provided by the invention can realize high conversion of acetic acid under a mild reaction condition; the conversion rate of acetic acid can reach 99% or more; the selectivity of ethyl alcohol can reach 95%.
Owner:TIANJIN UNIV

Control device and method for air compressor and dryer of new-energy commercial vehicle

ActiveCN110030184AClose interactionSynchronization of fault handling mechanismsPositive displacement pump componentsPump controlNew energyGas compressor
The invention discloses control device and method for an air compressor and a dryer of a new-energy commercial vehicle. The method comprises the steps of 1, electrifying the finished vehicle at high voltage, and supplying power to the dryer (10) and a condenser control valve (5) through an instrument and vehicle body control module (9); 2, acquiring air pressure values of a front barrel air pressure sensor (1), a rear barrel air pressure sensor (2) and a wet barrel air pressure sensor (3) through the instrument and vehicle body control module, and when min(P1 or P2 or P3) is smaller than 0.7 Mpa, outputting an inflation demand through the instrument and vehicle body control module; 3, controlling the air compressor (7) to work through a high-pressure accessory controller (6); 4, when max(P1 or P2 or P3) is larger than 1 Mpa, outputting an inflation stopping demand; and 5, controlling the air compressor to stop working through the high-pressure accessory controller, and supplying powerto an exhaust electromagnetic valve (4) through the instrument and vehicle body control module. The control device and method for the air compressor and the dryer of the new-energy commercial vehiclean realize the integral control on the functions such as dryer control, signal acquisition, fault diagnosis and function safety so as to conveniently adapt to the operation of the finished vehicle under the working condition.
Owner:SAIC MOTOR

Data processing method and device for live broadcasting room

The embodiment of the invention provides a data processing method and device for a live broadcast room, a user terminal can obtain corresponding anchor information and display a live broadcast robot matched with the anchor information in response to the detection of entering a live broadcast interface, and the corresponding live broadcast robot is matched for an anchor according to the anchor information corresponding to the user terminal. According to the method and the device, live broadcast guidance can be effectively performed according to live broadcast experience of an anchor, closer interaction with users in a live broadcast room is realized, the live broadcast content quality of the live broadcast room is effectively improved, and the corresponding process progress bar and the corresponding process node can be displayed in the operation page based on the live broadcast process information after broadcast is started, so that the user experience is improved. And the anchor can effectively control the live broadcast rhythm of the live broadcast room.
Owner:BEIJING CHENGSHI WANGLIN INFORMATION TECH CO LTD

Synthetic material powder and application thereof in hemostatic system

The invention provides synthetic material powder and application thereof in a hemostatic system. The synthetic material powder is formed by mixing synthetic molecules 1 and water absorption powder, and the synthetic molecules 1 and the water absorption powder can react with each other in the presence of blood to form gel, so that the strength of the styptic powder and the interaction capacity with tissues are enhanced. The composite styptic powder can absorb a large amount of moisture, and the degradation time can be adjusted to adapt to different bleeding positions and bleeding degrees.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

Method and application of low-temperature in-situ growth of nanostructured semiconductor metal oxides

The invention discloses a low-temperature in-situ growing method of a semiconducting metal oxide with a nano-structure as well as an application. According to the method, polymeric nanofibers containing an inorganic salt solution are deposited on a substrate with an electrospinning method, and then are subjected to hydro-thermal treatment, so that inorganic salt contained in the polymeric nanofibers is converted into the semiconducting metal oxide with the nano-structure in situ, and the semiconducting metal oxide is tightly combined with the substrate. The method has the advantages as follows: equipment is simple, steps are simple and convenient, the energy consumption is low, high-temperature thermal treatment is not required, a semiconducting metal oxide nano material is obtained on different substrates in situ at the relatively low temperature lower than 180 DEG C and the like; the method can be used for preparation of a flexible semiconducting metal oxide device with polymer as the substrate, further realizes good composition of the semiconducting metal oxide nano material and organic polymer conveniently, can be used for preparation of organic / semiconducting metal oxide nanocomposite materials and devices, and has a good application prospect in the field of nano photoelectric devices.
Owner:ZHEJIANG UNIV
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