29results about How to "Eliminate use" patented technology

The invention provides a process for synthesizing alpha-chloro-alpha-acetyl-gamma-butyrolactone and co-producing methyl formate from aminopyrimidine mother liquor and application of the process, and relates to the technical field of chlorination of alpha-acetyl-gamma-butyrolactone. The preparation method comprises the following steps: mixing aminopyrimidine mother liquor and alpha-acetyl-gamma-butyrolactone, carrying out chlorination reaction, and standing for layering to obtain an alpha-chloro-alpha-acetyl-gamma-butyrolactone layer and a water layer; and (b) adding methanol into the obtained water layer, and carrying out esterification reaction to obtain methyl formate. The method solves the technical problems that in the prior art, baking soda is consumed during chlorination of alpha-acetyl-gamma-butyrolactone, the cost of formic acid adopted in an esterification process is high, and sodium formate contained in the aminopyrimidine mother liquor is not recycled. The technical effects of eliminating the use of more expensive intermediate raw materials, namely baking soda and formic acid, recycling sodium formate in the aminopyrimidine mother liquor and co-producing and synthesizing methyl formate are achieved.

The invention relates to a line speed flow test method and device of a switch, the switch and a medium, and the method comprises the steps: constructing a test message through employing a central processing unit; a plurality of test messages are respectively sent to head ports of the to-be-tested port groups by using the central processing unit, and the plurality of test messages are sequentially and circularly forwarded at a plurality of to-be-tested ports in the to-be-tested port groups, so that the forwarding flow reaches the line speed of each to-be-tested port, and corresponding test data streams are formed; according to the invention, each test data stream is used to carry out a line speed flow test on the to-be-tested ports in each to-be-tested port group, so that the use of a tester is avoided, the test cost is reduced, the test networking is simplified, and the test success rate and efficiency are improved.

The invention provides a method for dyeing spandex textiles with reactive dyes, wherein a solvent system suitable for dyeing spandex textiles is used to uniformly disperse reactive dyes to prepare dye liquor, and then the spandex textiles treated with pre-stretching or tension relaxation are dyed. The solvent system includes a binary solvent system of a water-soluble monohydric alcohol organic solvent and water; a water-insoluble halogenated hydrocarbon organic solvent may also be added to form a ternary solvent system. The solvent system of the dye liquor of the invention can make the reactive dye molecules in the dye liquor significantly aggregate, making it easier to enter the interior of the spandex; and the solvent system has excellent wettability, which is more conducive to the combination of reactive dyes and spandex. The method has a short process time and a low dyeing temperature, and will not damage the internal structure of the spandex. The dyed spandex product has good color fastness and color uniformity; and no auxiliary agent needs to be added during the dyeing process, which reduces energy consumption and wastewater discharge, and has the advantages of being green and environmentally friendly.

The fluid high-temperature sterilization equipment small in size and good in flexibility comprises a sterilizer provided with a cylinder, a heating device and an annular coil pipe, the cylinder is provided with a first cavity, a second cavity and a third cavity from inside to outside, the first cavity is columnar, the second cavity and the third cavity are annular, the heating device comprises a heating pipe arranged in the first cavity, and the annular coil pipe is arranged in the heating pipe. The annular coil pipe comprises a first pipe, a second pipe and a third pipe which are respectively arranged in the first cavity, the second cavity and the third cavity; the first cavity, the second cavity and the third cavity are internally provided with a sterilization channel, a preheating channel and a cooling channel which are used for fluid materials to pass through respectively, inner circumferential pipelines of the first pipe, the second pipe and the third pipe form the sterilization channel, the preheating channel and the cooling channel respectively, and the second pipe, the first pipe and the third pipe are sequentially connected end to end and communicated, so that the preheating channel, the sterilization channel and the cooling channel are sequentially communicated. The fluid material sequentially passes through the preheating channel, the sterilization channel and the cooling channel, the fluid sterilization requirement can be met, the size is small, and flexibility is good.

This invention relates to the field of electrochemical sensors, specifically a method, apparatus, and application for converting ion-selective electrode potential signals into current signals using a single electrolytic cell. The method involves applying a constant voltage between the working electrode and the ion-selective electrode in a single electrolytic cell, converting the ion-selective electrode potential signal caused by changes in ion activity into a working electrode current signal with an embedded redox probe. This enables quantitative detection of the activity of the analyte ion using a current signal within a single electrolytic cell. This invention proposes the concept of embedding a redox probe, achieving the conversion of ion-selective electrode potential signals into current signals without distinguishing between the analyte background solution and the signal detection background solution. This overcomes the shortcomings of existing methods that require two electrolytic cells (detection and signal regions) and a salt bridge, resulting in a simpler apparatus.

The invention belongs to the technical field of biological engineering, and discloses a preparation method and application of Escherichia coli regulated by blue light, and the preparation method comprises the steps of blue light response element construction, strain engineering transformation, fermentation system design, culture condition optimization and product purification work.The blue light response element construction comprises the steps that a, a core light sensing assembly is selected; b, designing and synthesizing an EL222 coding sequence, c, constructing and synthesizing a promoter, and d, optimizing an EL222 binding site; the engineering modification of the strain comprises the following steps: a, integrating a photosensitive promoter and a target gene, and b, optimizing the expression level of EL222 protein. According to the invention, directional regulation and control of metabolic pathways can be realized at a subcellular level through the blue light response element, and through accurate control of illumination intensity and time, metabolic flux can be dynamically adjusted according to requirements, accumulation of metabolic intermediates is reduced, cytotoxicity is reduced, purity of a target product is improved, and the method is suitable for industrial production. The yield and the quality of a target product are improved through precise space-time regulation and control on escherichia coli metabolism.

The present invention provides a method for utilizing free acetamidine hydrochloride from aminopyrimidine mother liquor and co-producing methyl formate, and relates to the technical field of compound preparation. In the above method, aminopyrimidine mother liquor and acetamidine hydrochloride are first subjected to free reaction in a reactor, and the products are separated to obtain acetamidine and a formic acid-containing solution; then the formic acid-containing solution is esterified with methanol to obtain methyl formate. The above method utilizes sodium formate free acetamidine hydrochloride in aminopyrimidine mother liquor to achieve separation of acetamidine and formic acid-containing solution, and simultaneously utilizes the separated formic acid-containing solution and methanol for esterification synthesis to co-produce methyl formate, thereby eliminating the use of relatively expensive raw and auxiliary materials such as liquid sodium methoxide and formic acid in the production process of acetamidine and methyl formate, thereby greatly reducing the production cost.

The invention relates to an RGB picture hyperspectral information reconstruction method based on machine learning, and the method comprises the steps: collecting an RGB image and an HSI image of a plant, respectively building indexes for storage, and obtaining image data; performing cross validation distribution on the image data to obtain a data set comprising a training set and a validation set; based on the index, obtaining corresponding RGB image data and HSI image data from the data set, and obtaining training data; establishing a data loader, loading the training data through the data loader, and training the basic model to obtain a reconstruction model; and inputting the RGB picture to be reconstructed into the reconstruction model to obtain hyperspectral information used for calculating the hyperspectral characteristic parameters. According to the invention, the cost and complexity of hyperspectral image acquisition are reduced, and the efficiency and precision of hyperspectral information reconstruction are improved.

The invention discloses a circuit substrate structure and a manufacturing method thereof. The circuit substrate structure comprises a substrate, a solder resist connector, a support member and a chip. The substrate has a conductive structure. The solder resist connector is disposed on the substrate. The supporting piece is in contact with the solder resist combination piece, and the supporting piece is fixed on the substrate through the solder resist combination piece. The chip is arranged on the substrate, and the chip is electrically connected with the conductive structure.

The invention relates to a printed circuit board and a manufacturing method thereof. A printed wiring board according to the present invention is configured to include: a substrate including first to n-th layers stacked in a layered shape; a via hole formed through a layer including the first layer or the nth layer in a stacking direction; plating layers formed inside and outside the via holes; and a pad formed by separating the plating layer formed at the end of the via hole from the periphery. Consequently, the conduction path can be formed on one side of the bonding pad in the stacking direction to improve the component density, and thus the size of the substrate can be reduced.

The utility model provides a novel pump group shell structure, including pump body shell, the pump body shell is rubbed and is welded with lower bearing seat, the upper bearing seat is provided with in the upper bearing seat, the lower bearing seat and the upper bearing seat are outside interference and are equipped with the base, the top of base is connected with the top cover thread. Friction welding is fused as one, fundamentally eliminates the use of screw, friction welding need not open threaded hole, eliminates the potential leak path of threaded hole, thereby improves the sealing performance. The screw hole is the typical stress concentration point, is easy to produce crack under the alternating load, cancels the screw hole, and the structure is more continuous, and the stress distribution is more reasonable, improves the pressure -resisting capacity and the service life.

The present invention relates to a foaming unit for foaming milk or a milk / air mixture, the foaming unit having a steam supply line, a milk supply line, a mixing unit having a first flow region and a second flow region, and an outlet line having an outlet opening for milk foam, the outlet line being connected to the second flow region.

The invention provides a crystal array positioning method and device, and the method comprises the steps: obtaining the original energy spectrum of each crystal according to the scintillation pulse generated by each crystal in a crystal array, carrying out the light leakage or light absorption processing of different degrees on a reflection layer wrapping the crystal, and obtaining the original energy spectrum of each crystal according to the original energy spectrum. Enabling visible light photons generated after gamma photon deposition in the crystal to generate light leakage or light absorption of different degrees; energy spectrum positions of energy peaks in the original energy spectrums of all the crystals are determined, the energy spectrum positions of the energy peaks corresponding to all the crystals are different, and the degrees of light leakage or light absorption processing conducted on reflecting layers of all the crystals are different; and searching the serial number of the crystal associated with the energy spectrum position corresponding to each crystal from a predetermined association relationship between the energy spectrum position of the energy peak and the serial number of the crystal. According to the invention, additional light guide is not needed, the cost and complexity are reduced, and the spatial resolution of the detector is improved.

An expandable acoustic reinforcement member and a manufacturing method therefor and the use thereof. When one or more expansion trigger conditions are applied, an apparent volume of the expandable acoustic reinforcement member is increased, and an internal pore volume is increased. The expandable acoustic reinforcement member is applied to a loudspeaker, and an expansion trigger treatment is performed on the expandable acoustic reinforcement member, so that the apparent volume of the expandable acoustic reinforcement member is increased, and the internal pore volume is increased, such that the acoustic performance of the loudspeaker assembled with the expandable acoustic reinforcement member is improved; meanwhile, pressing is performed between the expandable acoustic reinforcement members, and between the expandable acoustic reinforcement member and a cavity wall of a specific space of the loudspeaker, so that the expandable acoustic reinforcement member is fixed, thereby achieving the effects of eliminating noise in the use process of the loudspeaker and preventing collisions and crushing of the acoustic reinforcement member to generate falling powder, and prolonging the service life of the acoustic reinforcement member.

Method of measuring bending of a nuclear reactor fuel channel. According to the method a fiber-optic sensor is equipped with a gravity pendulum that is suspended for angular motion at the lower end of the fibre-optic sensor; a flexible hollow carrier rod with the fibre-optic sensor is passed along the central tube of a fuel assembly and using a photoreceiver and a computer the shift of an interference pattern of a reflected light signal in a gas gap between the upper end face of the gravity pendulum and the lower end face of fibre-optic lines connected to the photoreceiver and fastened to the sensor is registered, said gas gap varying during the passage of the fibre-optic sensor as a result of the angular motion of the gravity pendulum away from the axis of the bowed central tube of the fuel assembly. On the basis of the registered shifts of the interference pattern of the reflected light signal, profilograms of the variations of the gas gap for each fibre-optic line of each fibre-optic sensor are recorded; and on the basis of the obtained gas gap profilograms, the magnitude and direction of bending of the central tube of the fuel assembly from the vertical axis are calculated, according to which the presence and magnitude of bending of the nuclear reactor fuel channel are determined.

The application discloses a high-anti-crack self-repairing fly ash geopolymer fireproof coating and a preparation method and application thereof, and belongs to the technical field of fireproof materials, and comprises the following raw materials in parts by weight: geopolymer powder 70-80 parts, active expansion component 3-6 parts, high-temperature self-repairing component 2-5 parts, heat insulation filler 10-25 parts, rheological modifier 1-2 parts and water 45 parts. The application selects fly ash geopolymer as the matrix of the fireproof coating, the fly ash geopolymer has excellent fireproof performance, meanwhile, the microcrystalline toughening effect of superfine fly ash is used, the use of fibers can be avoided, the adverse influence of the fibers on the interfacial adhesion is avoided, the green low-carbonization and long service life of the steel structure fireproof protective coating can be realized, and the sustainable development of industrial solid waste resource utilization and building fireproof materials is promoted.

The utility model relates to the field of automobile sensor, concretely relates to a built -in sensor of automobile tail door electric support rod, including code disc, fixed connection is in the motor shaft of electric cylinder or the input shaft of speed reducer and rotates with it, photoelectric sensor contains light emitting element and light receiving element, the code disc includes the bottom plate and the even number of protrusions established on the bottom plate, the protrusions are uniformly distributed on the same circumference, and form the code way between the four protrusions of adjacent two diameter directions, the moving path of protrusion is located between light emitting element and light receiving element, generates pulse signal through the obstruction / transmission light path, in the application scene such as electric tail door requiring low -speed smooth operation and high -precision position control, can guarantee control precision and stability.

Provided is a machining tool that causes little wear at engaging parts between a main drive shaft (14) and a drive shaft (5). The machining tool includes an upper shaft (6) attached to a host device, a driving shaft (5) inserted into the upper shaft (6), a main drive shaft (14) attached to the head of the driving shaft (5), a holder (15) inserted into the head of the main drive shaft (14), to which a cutting tool (9) is attached, a spherical bearing (4) supporting an outer side of the main drive shaft (14) for the main drive shaft (14) to be tiltable, a center steel ball (7) to be sandwiched between a depression of the head of the drive shaft (5) and an opposite depression of the rear end of the main drive shaft (14), and axial steel balls (10) provided to long grooves (11) on the outer surface of the head of the drive shaft (5) and provided to holes (18) of the main drive shaft (14).

The invention belongs to the field of flexible battery energy storage, and relates to a flexible self-supporting material and a preparation method and application thereof. The flexible self-supporting material comprises a carbon nanotube film, a Si / Ge film and a liquid metal film which are arranged in sequence. According to the invention, the carbon nanotube film is used as a flexible carrier, has good flexibility, mechanical property, conductivity and ultra-light weight, can greatly reduce the proportion of inactive substances in the electrode, and improves the energy density of the electrode material. Meanwhile, Si is easy to fall off from the traditional current collector Cu to cause damage to the electrode structure, and the carbon nanotube film well improves the defect and improves the stability of the electrode material.

The utility model discloses a single edge axle outer rotor wheel hub motor light weight motor box belongs to motor box technical field. The utility model discloses through optimizing motor box structure design and processing technology, realizes the light weight of motor box and the strength promotion. Specifically, the utility model will motor magnetism steel ring, aluminium package magnetism ring and motor box body are integrally formed through die casting or casting process. Among them, motor magnetism steel ring adopts the L type structure of precision machining, local optimization thickness, to satisfy magnetism demand and reduce weight, simultaneously, adopts local thickening design at the connecting part of motor box and motor end cover, has promoted the connecting strength and structural stability. The utility model discloses through the integration manufacturing, has reduced the assembly link, has improved production efficiency and product consistency, has effectively solved the problem that traditional wheel hub motor box is heavy, and the connecting strength is insufficient.

The utility model relates to the technical field of air compressors, and discloses an air compressor for polyester fabric spinning, which comprises a protection box, an air compressor is fixedly mounted in the protection box, a silencing pad is fixedly mounted at the bottom of the protection box, and a noise reduction box is fixedly mounted at the top of the air compressor. The positions, corresponding to the air compressor, of the two sides of the protection box are each provided with a sound insulation pad used for sound insulation, and the sound absorption structure is fixedly installed on the inner wall face of the noise reduction box; the noise absorption structure is used for absorbing noise generated when a motor at the top of the air compressor and the compressor work, through mutual cooperation of the structures, the noise influence caused when the air compressor works can be eliminated while the work of the air compressor is not affected, noise pollution is avoided, and the noise absorption structure is more practical.

The invention relates to measuring technology and can be used to implement a method for measuring bending of extended vertically directed channels. A fibre-optic sensor fixed at the end of a flexible hollow carrier rod is placed inside the extended vertically directed channel. A light signal is supplied via fibre-optic lines connected to the sensor, and reflected light signals are recorded. The fibre-optic sensor is equipped with a gravity pendulum. The flexible hollow carrier rod with the fibre-optic sensor is placed along the channel and using a photoreceiver and a computer to register the shift of an interference pattern of a reflected light signal in a gas gap between the upper end face of the gravity pendulum and the lower end face of fibre-optic lines connected to the photoreceiver and fastened to the sensor, said gas gap varying during the passage of the fibre-optic sensor as a result of the angular motion of the gravity pendulum away from the axis of the bowed channel. On the basis of the registered shifts, profilograms of the variations of the gas gap for each fibre-optic line are recorded; and on the basis of the obtained gas gap profilograms, the magnitude and direction of bending of the channel from the vertical axis are calculated to simplify measurements of bending of a vertically directed channel while maintaining measurement accuracy.

The utility model discloses a battery pack for isolating a charge-discharge high-voltage loop, and relates to the field of battery packs. The battery pack capable of isolating the charging and discharging high-voltage loop comprises a box body, battery cell modules, a first high-voltage circuit, a second high-voltage circuit, a discharging interface and a charging interface, a cavity is formed in the box body, and the multiple battery cell modules are selectively arranged in the cavity; the first high-voltage circuit and the second high-voltage circuit are electrically connected to the two sides of the multiple battery cell modules respectively, and the discharging interface and the charging interface are embedded in the two sides of the box body respectively. According to the battery pack for isolating the charge-discharge high-voltage loop, the discharge interface and the charge interface are respectively arranged at the two sides of the battery pack, so that the physical isolation of the charge-discharge high-voltage loop is realized, and the wiring complexity and potential short-circuit risk caused by the fact that the interfaces are arranged at the same side in the traditional design are avoided. And through the separated high-voltage circuit, the use of a long busbar is eliminated, and the safety of the battery pack is remarkably improved.

The application discloses a downhole power cutting device for a drill pipe in a coring accident, which comprises a downhole power cutting device body and an auxiliary device, wherein the downhole power cutting device body comprises a base, a bearing sleeve, a hydraulic cutter device, a screw motor, a bypass valve, a bearing seat, a single-acting water sealing assembly, a weight and a spear head, and the auxiliary device comprises a lifting and fishing winch, a steel wire rope, a drilling machine and a mud pump; the application can achieve the following effects: simple, quick, convenient, safe and reliable operation, fast and effective solution to the drill pipe cutting in a coring accident, limitation of the influence of the drill pipe cutting in the coring accident within a controllable range, reduction of manpower, material resources and time cost, improvement of the success probability of complex accident treatment, improvement of the drilling construction efficiency and reduction of the probability of abandonment of a drilling hole due to failure of complex accident treatment.

The present disclosure provides an in-slot cooling channel for an electric machine. A cooling manifold (112, 800) for an electric machine (14, 100) is presented that utilizes a hollow bolt (110) feed solution that utilizes an existing bolt structure and an interface with a housing (201) of the electric machine to form a fluid passage for directing coolant to an interior portion of a stator of the electric machine (14, 100). The hollow bolt (110) forms a sealed fluid interface without the need to add additional seals, thereby reducing the manufacturing complexity of the motor (14, 100). In-slot cooling with a manifold (112, 800) or with a plurality of said manifolds can eliminate the dependence on slot liners and varnishes for limiting relative movement of end windings of the stator and providing electrical isolation while also cooling the hottest portion of the electric machine (14, 100), significantly affecting the thermal confinement capability of the electric machine.

The invention belongs to the technical field of organic synthesis, and discloses a method for synthesizing and refining an important intermediate of monepantel. The method comprises the following steps: taking 3-(2-oxopropoxy)-4-(trifluoromethyl) phenyl nitrile as an initiator to react with a methanol solution of ammonia gas, then adding tert-butyl nitrate to react under the catalysis of palladium acetate, separating and drying to obtain a crude product hydrochloride, then recrystallizing in water and isopropanol, and then adjusting the alkali by ammonia water to obtain a target product. According to the method disclosed by the invention, the use of highly toxic chemicals is eliminated, the danger of reaction operation is reduced, meanwhile, a product refining method is provided, the purity and the yield of the product are improved, and higher feasibility is provided for commercial production.

This invention discloses a method for preparing biomass hard carbon anode materials without acid washing, comprising the following steps: using pure water as a solvent, placing biomass particles in a Soxhlet extractor, continuously circulating and extracting the biomass particles under reflux conditions for 2-5 hours; after extraction, removing the solid and drying it to obtain water-extracted purified biomass; heating the obtained water-extracted purified biomass to 300-550°C at a heating rate of 2-10°C / min, holding it at this temperature for 2-5 hours, then naturally cooling it to room temperature, and then washing and drying it with pure water; heating the obtained pre-oxidized carbonized product to 1100-1550°C at a heating rate of 2-10°C / min, holding it at this temperature for 3-6 hours, and then naturally cooling it to room temperature; washing the obtained carbonized product with pure water until the filtrate is neutral, and then drying it. Compared with the prior art, this method solves the problems of serious wastewater pollution, significant safety hazards, high costs, long production cycles, and the easy introduction of oxygen-containing defects that damage electrochemical performance.

This utility model discloses an adjustment structure for a power transformer lead support, belonging to the field of transformer equipment. A first lead support is positioned relative to one end of a third lead support via a first set of adjustment components, and a second lead support is positioned relative to the other end of the third lead support via a second set of adjustment components. A third set of adjustment components is positioned on the side of the third lead support closer to the first lead support, and a fourth set of adjustment components is positioned on the side of the third lead support closer to the second lead support. The first and third sets of adjustment components are positioned opposite each other, as are the second and fourth sets. A first connecting member is provided between the first and third sets of adjustment components, penetrating both sets. A second connecting member is provided between the second and fourth sets of adjustment components, also penetrating both sets.

The invention discloses a vehicle positioning method and system based on weight adjustment, and relates to the field of vehicle positioning, a positioning system arranged on a vehicle is used for executing the following steps: the positioning system generates an image quality value and a lane line confidence degree, the positioning system generates an image confidence degree according to the image quality value and the lane line confidence degree, and the image confidence degree corresponds to the image quality value and the lane line confidence degree. The positioning system generates a positioning confidence degree according to the received plurality of positioning data, and adjusts a driving image weight value, a positioning data weight value and an inertial data weight value according to the image confidence degree and the positioning confidence degree. And the positioning system adjusts an original positioning coordinate value obtained by the positioning system according to the driving image weight value, the positioning data weight value and the inertial data weight value to generate a final positioning coordinate value. According to the invention, the use of a high-unit-price optical radar is avoided, and meanwhile, the problem of positioning judgment failure or abnormality possibly caused by excessive dependence on a driving image is avoided.