12results about How to "Avoid using directly" patented technology

The invention discloses a Schiff base functionalized silica aerogel / benzo (a) pyrene molecularly imprinted material and application thereof, pyrene is used as a virtual template molecule, and Schiff base functionalized silica aerogel is added; adding a functional monomer, a cross-linking agent and an initiator; and preparing the Schiff base functionalized silicon dioxide aerogel / benzo (a) pyrene molecularly imprinted material by adopting a surface imprinting polymerization method. The silicon dioxide aerogel is used as a base material, and the adsorption efficiency of benzo (a) pyrene is enhanced through the porous structure and high porosity of the silicon dioxide aerogel. Schiff base groups are introduced to form strong interaction with benzo (a) pyrene molecules, so that the adsorption capacity is further improved. And by combining a molecular imprinting technology, holes highly matched with benzo (a) pyrene are formed on the surface of the Schiff base functionalized aerogel, so that the material is endowed with high selectivity. Pyrene is used as a virtual template, so that the use of benzo (a) pyrene is avoided, and the environmental risk and the material cost are reduced.

The invention discloses a holder identification and capture method and system based on an abnormal scene, and relates to the technical field of intelligent equipment. Performing frame extraction processing on the video stream according to a first preset period to obtain an initial image set; determining a target background and a target image according to the initial image set, and if the target image exists, performing background separation on the target image according to the target background to obtain a foreground image; performing initial key point extraction on the foreground image to obtain an initial key point set, performing object recognition according to the initial key point set, and if an object is recognized, performing target key point extraction on the object to obtain a target key point set; and tracking the object in real time according to the target key point set until the object cannot be identified in the foreground region. The target background and the target image are determined according to the image obtained by frame extraction, direct use of a fixed background is avoided, the accuracy of subsequent object recognition is improved, and the accuracy and effectiveness of target recognition and capture are improved by performing key point recognition on the recognized object.

The invention relates to the technical field of oil exploitation equipment, in particular to an implementation method for constructing an electrical indicator diagram based on electrical parameter data of a pumping unit. The technical problems are as follows: an actual measurement indicator diagram device in the prior art is under the action of periodic alternating load for a long time and is easy to break down; according to the technical scheme, the implementation method for constructing the electrical indicator diagram based on the electrical parameter data of the oil pumping unit comprises the steps that collected power and angular displacement data are substituted into a fitted torque curve formula for calculation, and an indicator diagram is obtained; compared with an actual measurement indicator diagram device in the prior art, which is under the action of periodic alternating load for a long time and is easy to generate faults, the suspension point indicator diagram is indirectly calculated by measuring the electrical parameters of the pumping unit motor and walking beam rotation angle data acquired by the attitude instrument, direct use of the actual measurement device is avoided, and the cost is reduced. Therefore, the efficiency and the accuracy of obtaining the indicator diagram are obviously improved; as the measurement of the electrical parameters and the rotation angle data is relatively stable and reliable, the repeatability of the indicator diagram is also improved.

The present invention seeks to protect a test system for the development of a fuel cell air subsystem, which includes an air intake module, an auxiliary cooling module, a gas consumption and flow resistance simulation module, a humidification module, and a temperature and humidity simulation module, wherein the air intake module is used for air to enter the air subsystem; the auxiliary cooling module is used to cool the air subsystem; the gas consumption and flow resistance simulation module is used to simulate the gas consumption of cathode oxygen and the flow resistance of the cathode of the fuel cell stack; the humidification module is used to humidify and exchange heat for compressed air; the temperature and humidity simulation module is used to simultaneously control the temperature and humidity of the air coming out of the humidification module to the target air outlet temperature and humidity, thereby completing the simulation of heating and humidification of the gas inside the fuel cell stack; the air then passes through the insulation of the heating belt and enters the back-pressure tail exhaust part of the air subsystem.

This invention discloses a Bi₂O₃ / V₂C material, its preparation method, and its applications. The Bi₂O₃ / V₂C material is synthesized from Bi salt and V₂C through a hydrothermal reaction and calcination. The elemental molar ratio between Bi salt and V₂C is Bi:V = 14~300:1. By weight, the ratio between Bi salt and V₂C is m(V₂C):m(Bi salt) = 0.1%~2%:1. This invention uses the oxide corresponding to the Bi salt as the main catalyst and introduces V₂C as a co-catalyst. The resulting material exhibits improved catalytic performance, requires a lower V₂C dosage, and can catalytically degrade malachite green at a degradation rate of over 90%.

The present invention belongs to the technical field of catalysts for chemical chain oxidation and dehydrogenation of low-carbon alkanes, and discloses a core-shell type vanadium-based metal oxide catalyst and its preparation method and application. The core of the core-shell catalyst is a metal oxide nanoparticle containing at least metal vanadium, and serves as a bulk oxygen supplier; the surface shell is an alkaline earth metal vanadate generated based on the solid phase reaction of vanadium oxide and alkaline earth metal oxide, and serves as a catalytic active site; the preparation method is to first obtain metal oxide nanoparticles, then dissolve the precursor salt of the alkaline earth metal in water to form an impregnation solution, and impregnate the impregnation solution onto the metal oxide nanoparticles, and the obtained material is dried and roasted to obtain the target product. The core-shell multi-metal oxide catalyst of the present invention is applied to chemical chain propane oxidation and dehydrogenation reaction, and can have high propylene selectivity without sacrificing propane conversion rate; it has the outstanding advantages of high conversion rate of low-carbon alkanes per pass and high selectivity of target product olefins.

The utility model relates to the technical field of mobile phone middle frame processing, and discloses a vacuum adsorption tool for mobile phone middle frame processing, which comprises a working table, four universal wheels are arranged at the bottom end of the working table, limiting assemblies are arranged on the four universal wheels, two longitudinal moving assemblies are arranged at the top end of the working table, and the two longitudinal moving assemblies are arranged on the working table. By arranging the longitudinal moving assemblies, the up-down moving assemblies, the vacuum air pump, the vacuum adsorption plate and the air exhaust holes, the longitudinal moving assemblies move backwards until the vacuum adsorption plate is located over the excess materials; the up-and-down moving assembly starts to move until the vacuum adsorption plate is attached to the excess materials, the vacuum air pump is started, air in the air suction hole is pumped out, the vacuum adsorption plate adsorbs the excess materials under the action of atmospheric pressure, and then the up-and-down moving assembly moves upwards to reset, so that compared with the prior art, the situation that a worker directly uses a hand buckle is avoided, and the working efficiency can be improved; and enterprise production benefits are increased.

The invention relates to the field of medicinal chemistry, and particularly discloses a novel TLR8 agonist intermediate as well as a preparation method and application thereof, which are suitable for process development of 4, 6-diaminopyridino [3, 2-d] pyrimidine TLR8 agonists. According to the preparation method, tert-butyl is adopted to replace 2, 4-dimethoxybenzyl to serve as an amino protecting group, so that the crystallization property of the intermediate is remarkably improved, column chromatography is avoided, the cost is reduced, and the process stability is improved. The preparation method of the TLR8 agonist intermediate comprises the steps of reduction, acylating chlorination, coupling, amination and the like, has the advantages of being easy and convenient to operate, high in yield, environmentally friendly and the like, and is particularly suitable for industrial production.

The present invention belongs to the technical field of medical materials, and relates to a sol-gel preparation method and product of 45S5 bioactive glass. The preparation method comprises the following steps: (1) synthesis of phosphoric acid-ethylene glycol ester; (2) preparation of nitrogen-containing carbon quantum dots; (3) preparation of sol; (4) preparation of aqueous solution; (5) preparation of gel; and (6) heat treatment. The present invention also provides a 45S5 bioactive glass. In the sol-gel preparation method of the present invention, phosphoric acid-ethylene glycol ester is used as the source of P2O5 in the product, which can avoid the problem of difficult control of product phosphorus content and waste of raw materials caused by volatilization when triethyl phosphate is used as a raw material in the prior art. At the same time, nitrogen-containing carbon quantum dots are used, so that the specific surface area of ​​the prepared 45S5 bioactive glass is effectively improved. The present invention has the advantages of safe raw materials, short required gel time, stable oxide components in the product, and high specific surface area of ​​the prepared 45S5 bioactive glass.

The present invention provides a single-image 3D reconstruction method based on deep learning video supervision, comprising the following steps: 1) constructing an object pose prediction module: according to the object in the input image, the position of the camera shooting relative to the object can be obtained; 2) constructing an object 3D shape estimation module: according to the input single object image, its 3D point cloud is obtained by iteratively optimizing the loss prediction; 3) constructing a multi-frame shape fusion module: the video line sequence is input into the above two modules in parallel, and the camera pose and 3D shape prediction of a single frame can be obtained, and more accurate prediction can be obtained through multi-frame weight fusion and consistency constraints and smoothness constraints; 4) overall training framework: including three stages of data preprocessing, model framework training and testing. The method of the present invention realizes end-to-end 3D reconstruction, can use video sequences for training, and can predict its 3D point cloud using only a single image in the test stage.

This invention discloses a pesticide reduction and enhancement adjuvant and its preparation method, belonging to the field of pesticide technology. The adjuvant is composed of 7-9 parts potassium oleate, 1-2 parts dipotassium hydrogen phosphate, and 1-2 parts 2-ethylidene-5-phenylvaleric acid. The preparation method involves stirring and mixing the components at room temperature to form a homogeneous solution. When used in combination with chemical pesticides such as triadimefon, carbendazim, and pyraclostrobin, this adjuvant can significantly enhance pesticide efficacy. Even with a 50%-80% reduction in chemical pesticide usage, the control efficacy remains above 90%, effectively reducing pesticide residues and environmental risks. This invention has the advantages of simple composition, low cost, and environmentally friendly process, and is suitable for reducing pesticide use and increasing efficiency in agricultural production.

The invention discloses a multivariable gating signal amplification system and an application thereof in miRNA-21 imaging, and relates to the technical field of probe design of in-situ imaging of miRNA in cells. The multivariable gating signal amplification system provided by the invention comprises molecular beacon probes H1 and H2; the nucleotide sequence of the molecular beacon probe H1 is as shown in SEQ ID NO.1, a disulfide bond is embedded between the eighth basic group and the ninth basic group from the 3'end of the nucleotide sequence, and a fluorophore Cy3 is modified on the fifteenth basic group; the nucleotide sequence of the molecular beacon probe H2 is shown as SEQ ID NO.2, a light splitting linking bond (PC-linker) is embedded between the eighth basic group and the ninth basic group from the 3'end of the nucleotide sequence, and a fluorophore Cy5 is modified at the 5 'end. Besides, the molecular beacon probes H1 and H2 and the water-phase up-conversion nanoparticles coated with the polylysine are prepared into a compound, so that the miRNA-21 detection in a non-cell environment and a cell environment is realized, and the miRNA-21 detection probe has the advantages of high specificity, high detection sensitivity and high stability.