39results about How to "Economical and convenient" patented technology

The invention relates to a large span steel box girder cable-stayed bridge tower lower beam segment mounting method, belonging to the bridge construction steel box girder construction technology field. The construction method comprises the steps: (1) setting up a masts type crane lifting tower area steel box girder by means of the upper crossbeam of the cable tower and the construction wind; (2) mounting the bridge deck crane in on the tower area steel box girder and lifting the first standard beam segment immediately adjacent to the tower area steel box girder; (3) mounting the bridge deck crane symmetrically on the mounted first standard beam segment, and starting the standard beam segment symmetrical hanging on both the river side and the bank side. The method in the invention achieves the advantages of simple, practical, safe, reliable, economic, convenient less limited by the construction condition, solves the problems in present large span steel box girder cable-stayed bridge construction process.

The invention relates to a piano electronic teaching device based on a DSP (digital signal processor), which relates to a music teaching aid. The piano electronic teaching device comprises a piano main body and a microcomputer control system; the piano main body has the structure of an ordinary piano, a piano baffle of the shell of the piano main body is also provided with a DSP control box, a touch screen, a USB (universal serial bus) 2.0 interface, a serial port female and a mode selector switch; and the microcomputer control system comprises a DSP control module, a power supply control module, a music transmission module, a detection alarming module and a touch screen human-machine interaction module, all modules of the microcomputer control system are integrated inside the DSP control box, the device has a teaching mode and a self-determined practice mode, so that the defects of high cost and inconvenience of the one-to-one and face-to-face teaching and the remote teaching can be overcome.

The invention discloses a double reagent method for detecting indirect bilirubin in serum, which belongs to a material detecting method based on color change in the result of a test reaction by means of visible light. The technical scheme is that a diazo reagent is added in a reagent I, and the reagent I only contains active ingredients of an accelerator. The detecting method comprises the following steps: before use, a reagent A is mixed with a reagent B in the volume ratio of 20:1 to obtain the reagent I, warm bath is performed firstly on serum and the reagent I at 37 degrees C for 3 to 5 minutes, and direct bilirubin in the serum reacts with diazo acid chloride in the reagent I to obtain azobilirubin; then, a reagent II is added, warm bath is performed at 37 degrees C for 4 to 7 minutes; under the action of the accelerator, hydrogen bonds of the indirect bilirubin are broken, and then, the indirect bilirubin reacts with the diazo acid chloride to obtain the azobilirubin. The instrument is detected at the wavelength of 540 to 550 nm, and the azobilirubin obtained by the reaction of the reagent I is blank. Therefore, the content of the indirect bilirubin is calculated based on the azobilirubin obtained by the reaction of the reagent II.

The invention relates to a composite rammed-earth wall, a template device adopted in the construction thereof and a construction method thereof. The wall comprises two wallboards which are arranged in a mirror symmetry manner and a rammed-earth main body filling between the two wallboards, wherein each wallboard is formed by splicing a plurality of unit wallboards according to a way of multiple layers in a vertical direction and multiple wallboards at each layer, each unit wallboard is of a reinforced concrete structure, and a reinforced bar connection part is arranged between every two opposite unit wallboards; a template structure comprises wall templates arranged on two surfaces, side baffle plates arranged at two sides and a plurality of groups of template fixing assemblies, wherein the wall templates on two surfaces form the two wallboards, during the construction process of the wall, the side baffle plates at two sides temporarily limit two sides of filled rammed earth, and the plurality of groups of template fixing assemblies are detachably clamped on the upper end parts of the two wall templates. The construction method comprises: performing construction by adopting the template device, first ramming a first layer of the wall, and then gradually ramming the wall upwards layer by layer until a set height of the wall is achieved. The rammed composite wall is relatively high in strength and relatively good in weather resistance and durability.

The invention discloses preparation methods for acotiamide and hydrochloride thereof; 2[(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxylic acid methyl ester and N,N-diisoprylamino ethylamine are subjected to a reaction in a molten state to obtain N-[2-(diisopropylamino)ethyl]-2-(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxamide, and hydrochloric acid is dropwise added to N-[2-(diisopropylamino)ethyl]-2-(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxamide in methanol to prepare acotiamide hydrochloride trihydrate. The preparation methods reduce the use of toluene, and are economical and convenient, complete in reaction, and safe in process; at the same time, toluene residues in the final products and the amount of an impurity 2[(2-hydroxy-4,5-dimethoxybenzoyl)amino]-4-carboxyl-1,3-thiazole are reduced, and the product quality is improved; and the crude products are easy to refine and purify, and the reaction yield is high.

The invention discloses magnetically-responsive loaded Janus hierarchical-pore SiO2 composite microspheres and a preparation method thereof. The magnetically-responsive loaded Janus hierarchical-poreSiO2 composite microspheres is obtained by uniformly dispersing Fe3O4 nanoparticles in hierarchical-pore passages of hierarchical-pore SiO2 with an emulsion method, and then loading active componentssuch as Au nanoparticles, Ag nanoparticles and the like into the hierarchical-pore passages thereof. In the process of preparing a magnetic porous material by the emulsion method, the Fe3O4 nanoparticles are not required to be modified, and under a condition of low pH, the Fe3O4 nanoparticles can be sufficiently dispersed into an emulsion system and effectively enter the pore passages of the hierarchical-pore SiO2, so that high dispersion and loading of the magnetic nanoparticles are achieved. The magnetically-responsive loaded Janus hierarchical-pore SiO2 composite microspheres can be used asa solid surfactant and a solid catalyst for stabilizing a Pickering emulsion formed by a contaminant-containing aqueous phase and a common organic solvent as an oil phase so as to achieve interfacialcatalytic degradation of contaminants, and can also be recycled.

A method for removing organic matters on a surface of micro-plastic by optimizing Fenton reagent reaction conditions, and belongs to the field of environmental pollution control. The method comprisesthe steps of: preparing a Fenton reagent with a concentration of 5-10 g/L; preparing different sizes of microplastic particles, and measuring the sizes of microplastic particles before digestion; andfinally, performing the digestion by using the Fenton reagent. The method provided by the invention can remove organic matters on the surface of the micro-plastic, does not have obvious influence on the micro-plastic, and has the higher removal efficiency on the organic matters on the surface of the micro-plastic in an actual sample.

The invention discloses a lath type aeration oxidation device, including water fall laths, a water fall lath fixing frame, a raw water inlet distributor, an exhaust port, an aeration tower body and a reaction tank. The aeration tower body is connected above the reaction tank; the exhaust port is connected with the conical top of the aeration tower body; the raw water inlet distributor is connected with the upper shell course of the aeration tower and placed in the conical top of the aeration tower body; the water fall lath fixing frame is connected with the shell course of the aeration tower body; the water fall laths are connected with the water fall lath fixing frame; the width of the water fall lath is greater than the interval gap; and two adjacent layers of water fall lath are in staggered arrangement. The device provided by the invention has the characteristics of uniform and full aeration, simple structure, good economical performance, thrift, easy and convenient operation, high efficiency, environment-friendliness, safety and reliability.

The invention relates to an intelligent monitoring device based on GSM/GPRS (global system for mobile communication)/(general packet radio service). The intelligent monitoring device constitutes a wireless network by a front end annular device sleeved on the wrists of monitored personnel and a background monitoring center, wherein the front end annular device consists of a microprocessor, a data acquisition transmission module, a power supply module, a remote control module and a handcuff body; the data acquisition transmission module is used for collecting the position information of a community in which the monitored personnel is located and the electric quantity information of a battery in the front end annular device; the microprocessor is used for transmitting the collected positioning information and the electric quantity of the battery to the background monitoring center through the data acquisition transmission module at regular time; the remote control module is used for receiving an infrared signal and transmitting the infrared signal to the microprocessor through a UART (universal asynchronous receiver/transmitter) interface; the handcuff body is used for fixing the annular device on the wrist of the monitored personnel; and the background control center is used for receiving information transmitted by the annular device fixed on the wrist of the monitored personnel. The intelligent monitoring device based on GSM/GPRS effectively reinforces the timeliness and coverage of monitoring the people on probation. The monitoring reliability is effectively guaranteed. The intelligent monitoring device based on GSM/GPRS is economical and convenient and saves human resource.

The invention discloses a bulk cargo self-unloading compartment. After a hydraulic motor is started, the unloading chain is driven to rotate counterclockwise through a drive chain, and the scraper on the unloading chain gradually drags the bulk cargo out of the compartment. Compared with the prior art, the present invention has a simple structure, does not need to set a movable floor at the bottom of the carriage, has better economy and convenience, and can be applied not only to new carriages, but also to the transformation of existing carriages.

The invention discloses a down-hole ultrasonic oscillation unfreezing device and method. The unfreezing device comprises a power supply and a cable collection and release device which are placed on the ground, a cable winds the cable collection and release device, and a depth positioning tool and an ultrasonic oscillation transducer are connected to the lower end of the cable; the ultrasonic oscillation transducer can extend to the upper portion or interior of a down-hole water distributor core for unfreezing operation. The depth positioning tool comprises a cable guiding connector and a magnetic positioning tool; the ultrasonic oscillation transducer comprises an axial ultrasonic transmitter and a radial ultrasonic transmitter. According to the down-hole ultrasonic oscillation unfreezingdevice and method, the problem can be effectively solved that since a water distributor is used for layered water injection of an existing offshore oilfield flooding well, the water distributor is frozen. Accordingly, the operation of a mobile pipe column is avoided, the operation intensity is lowered, the operation time is shortened, and the operation cost is reduced.

An external Chinese patent drug for treating tubal obstruction barrenness and a preparation method thereof relate to the technical filed of medical preparation derived from plant materials in International Classification A 61K. The complete formula of the invention consists of motherwort, red paeony root, zedoary, radix angelicae, cinnamon and camphor. The raw materials are purified through enzymolysis oligopeptides and is processed into small molecules. The purified superfine powder is mixed according to a certain proportion, blended into various preparation forms and made into finish product in different packages. The method treats diseases through external administration by dipping hands and feet and covering bellybutton, lower abdomen and other points. The invention achieves the aims of relieving visible and invisible dropsy among tissues around fallopian tube and nonsterile and sterile inflammatory excrescence hyperplasia through the sense and absorption of hand and foot peripheral nerves and blood circulation. The invention has the advantages of simple operation, quick response due to targeting drug delivery, low cost and obvious effect.

The invention discloses a preparation method of a three-dimensional platinum/Mxene-reduced graphene oxide catalyst, and relates to the technical field of catalysts. The method comprises the followingsteps: (1) preparing Mxene; and (2) respectively adding graphene oxide and Mxene prepared in the step (1) into ethylene glycol, carrying out ultrasonic action, adding K2PtCl4 into the suspension, stirring, pouring the mixture into a high-pressure reaction kettle, and reacting at 120 DEG C to obtain the three-dimensional platinum/Mxene-reduced graphene oxide catalyst. The invention also provides aproduct prepared by the preparation method and application thereof. The invention has the advantages that the preparation method is simple, mild, harmless, economical and convenient. And Pt/MxenerGO has an excellent electro-catalytic property. Meanwhile, the CO resistance and tolerance to methanol oxidation reaction are good.

The invention relates to a cryogenic treatment method for enhancing the anti-fatigue strength of a stainless steel wire mesh, and belongs to the technical field of stainless steel wire mesh heat treatment. The method comprises the following steps that 1, the stainless steel wire mesh is soaked into liquid nitrogen for liquid-method cryogenic treatment, wherein the temperature of the liquid nitrogen ranges from -196 DEG C to -160DEG C, and the soaking time of the stainless steel wire mesh in the liquid nitrogen ranges from 3 seconds to 30 minutes; 2, the stainless steel wire mesh is directly taken out from the liquid nitrogen and placed in a heating device to be slowly heated for 30-40 minutes, and then the stainless steel wire mesh is placed in air to be heated to room temperature for slowheating for the time determined according to the material and anti-fatigue strength of a workpiece, wherein the initial temperature of the heating device ranges from -130 DEG C to -110 DEG C, and thetemperature of the heating device can be controlled through a program; 3, the above steps are repeated for 0-2 times; and 4, the workpiece is put into a muffle furnace with a set control temperatureof 200 DEG C for tempering for 1 hour to eliminate stress, and then the workpiece is air-cooled to room temperature. The method has the following advantages that the anti-fatigue strength of the stainless steel wire mesh is effectively improved, the treatment method is economical and convenient, and the treatment efficiency is high.

The invention discloses an assay kit for type-2 diabetes disease risk assessment on the basis of GCKR genetic locus rs780092, and further provides an application of substance for testing single nucleotide polymorphism of the genetic locus rs780092 in preparing products for assessing or assisting in assessing type-2 diabetes disease risk for people under test. According to the invention, influence of the genetic locus rs780092 related to blood lipid to type-2 diabetes disease risk is cleared and defined and is brought into a risk assessment system; on the basis of the genetic locus rs780092 related to blood lipid, influence to type-2 diabetes disease risk of different individuals caused by rising of blood lipid is assessed, and factors of type-2 diabetes disease risk assessment adaptable to Chinese people are researched in large-scale prospective cohort. The assay kit and the application have great significance in solving problems about comprehension, individuation and accuracy of type-2 diabetes disease risk assessment.

The invention discloses a combined cutter, which comprises a counter bit, a clamping section and a drill bit, and also comprises a blade, wherein the blade is clamped together with the drill bit in the vertical direction through the clamping section, and a lead angle opening is molded on a connected part of the drill bit and the clamping section. According to the invention, once molding and drilling of different types of materials can be achieved; a processing procedure is reduced, and the processing efficiency can be obviously improved.

The invention provides an axial limiting device and method for a planet carrier of a rotary type planetary gearbox. A limiting ring is installed in a clamping groove machined in the left side of upper teeth of a machine body. Inner teeth of the limiting ring are meshed with outer teeth of the machine body. The machine body is meshed with the planet carrier. The tooth thickness and the tooth space center line of the limiting ring are both aligned with the tooth thickness and the tooth space center line of the machine body. The limiting ring and the planet carrier are combined and then connected through bolts. The planet carrier is clamped in the middle of the groove of the fixed machine body through the limiting ring with the inner teeth. The teeth of the limiting ring are arranged into the clamping groove along the tooth spaces of the machine body, the inner teeth of the limiting ring are circumferentially rotated by an angle relative to the outer teeth of the machine body, the teeth of the limiting ring are stopped by the outer teeth of the machine body, the limiting ring and the planet carrier of the low-speed level are connected through the bolts, and therefore the planet carrier of the low-speed level is axially limited. The axial limiting device has the advantages of being adjustable, good in floating stability and disassembly and assembly usability and the like. The axial limiting device is simple in structure, easy to machine, convenient to install, economical and convenient to use.

The invention provides a multifunctional small boiler comprising a combustion chamber, a fire grate used for filtering ash, a table board sitting on the combustion chamber, a backfire flue adjacent to the combustion chamber, and a blower used for accelerating and promoting the combustion of fuel coal. A cavity wall of the combustion chamber is provided with an inlet used for adding fuel coal and an arc-shaped fire-retarding plate is arranged above the combustion chamber; a space area between the table board and the fire-retarding plate is a buffer chamber; the blower is arranged on one side of the cavity wall of the combustion chamber; a blowing inlet of the blower is aligned with a coal combustion area; the fire grate at the bottom of the combustion chamber separates the combustion chamber from a boiler ash chamber; a flue plate is arranged between the flue and the combustion chamber; a plurality of water pipes are arranged in the flue. The boiler is especially suitable for rural families, can fully utilize coal resources, enables sufficient combustion of coal resources, achieves high efficiency utilization, is economical and convenient and causes less pollution.

The invention relates to a rapid detection device and detection method for the reliability of a lithium battery current cut-off device, and the device comprises a pedestal, a vertical column, a lead screw, a stepping motor, a workbench, a main shaft box, a laser range finder, and a drill bit suite. The stepping motor is in transmission fit with the lead screw. The laser range finder obtains vertical distance information and corresponding position information between the spindle box and the workbench; and the drill bit suite is detachably connected into the drill bit interface, so that punching on the top cover of the battery sample is realized, the current cut-off device is triggered in a programmed physical mode, and the reliability of the current cut-off device is detected under the condition that no gas is generated in the battery. Compared with the prior art, by designing the special drilling device, the reliability of the current cut-off device (CID) of the cylindrical lithium battery finished product can be directly detected, the use is rapid, convenient, simple and efficient, and the device is suitable for second-party and third-party quality inspection and detection of the cylindrical lithium battery product.

The invention discloses a multi-dimensional early warning model construction method for screening high risk of cognitive impairment and an evaluation system thereof. The method comprises the following steps: formulating a group entering standard and collecting information of subjects in a community; collecting basic data and hematuria indexes, conducting a neuropsychological test, and recording and storing data; preliminarily screening out data indexes with significant difference between a cognitive disorder high-risk group and a normal group, and taking the data indexes as effective risk prediction indexes; respectively establishing three early warning models by adopting a multi-factor logistic regression method, drawing a subject working characteristic curve of the corresponding early warning model, selecting an optimal early warning model threshold parameter, and calculating a prediction effect of the corresponding early warning model; and constructing a multi-dimensional cognitive impairment high-risk screening system embedded with a mobile terminal or a computer, and according to data information input by a subject, automatically analyzing and calculating a risk score by the system, and outputting a risk level and a specific health suggestion. According to the invention, a plurality of choices are provided in combination with the self condition of the subject, and the sensitivity accuracy is increased from low to high.

A solid-state hydrogen power generation device provided with a hydrogen storage bottle made of a copper-based alloy composite material comprises a hydrogen storage device, a hydrogen supply device, a power generation battery device and the like, wherein the hydrogen storage device comprises the hydrogen storage bottle containing hydrogen storage particles, the average diameter of the hydrogen storage particles is in range of 20 micrometers to 200 micrometers, and the hydrogen storage particles have inner cavities encircled by porous walls; a gas hole is formed in one end of the hydrogen storage bottle, and a filter is arranged in the gas hole; and a case of the hydrogen storage bottle comprises a copper-based alloy liner and a carbon fiber reinforced layer.

The invention discloses a hydrogen storage device prepared by a silver cadmium oxide composite material. A solid hydrogen power generating device comprises a hydrogen storage device, a hydrogen supply device, a power generating battery device and the like, wherein the hydrogen storage device comprises a hydrogen storage cylinder containing hydrogen storage particles, the average diameter of each hydrogen storage particle ranges from 20 mu m to 200 mu m, and each hydrogen storage particle is provided with an internal cavity surrounded by a porous wall; an air hole is formed in one end of the hydrogen storage cylinder, and a filter is arranged in the air hole; and a casing of the hydrogen storage cylinder comprises a liner prepared by a silver cadmium oxide material and a carbon fiber enhancement layer.

A solid hydrogen power generating device comprises a hydrogen storage device, a hydrogen supply device, a power generating battery device and the like, wherein the hydrogen storage device comprises a hydrogen storage tank containing hydrogen storage particles, the average diameter of each hydrogen storage particle ranges from 20 mu m to 200 mu m, and each hydrogen storage particle is provided with an internal cavity surrounded by a porous wall; an air hole is formed in one end of the hydrogen storage tank, and a filter is arranged in the air hole; the hydrogen storage tank is made of aluminum alloy; and the power generating battery device is provided with the polymer electrolyte membrane.

A solid hydrogen power generating device comprises a hydrogen storage device, a hydrogen supply device, a power generating battery device and the like, wherein the hydrogen storage device comprises a hydrogen storage cylinder containing hydrogen storage particles, the average diameter of each hydrogen storage particle ranges from 20 mu m to 200 mu m, and each hydrogen storage particle is provided with an internal cavity surrounded by a porous wall; an air hole is formed in one end of the hydrogen storage cylinder, and a filter is arranged in the air hole; and the hydrogen storage cylinder is made of a copper-base alloy.

The utility model provides a generating device provided with a hydrogen storage tank adopting a non-metallic material. The solid hydrogen generating device comprises a hydrogen storage device, a hydrogen supply device, a generating battery device and the like, wherein the hydrogen storage device comprises the hydrogen storage tank containing hydrogen storage particles, the average diameter of each hydrogen storage particle ranges from 20 mu m to 200 mu m, and each hydrogen storage particle is provided with an internal cavity surrounded by a porous wall; an air hole is formed in one end of the hydrogen storage tank, and a filter is arranged in the air hole; and the hydrogen storage tank is made of the non-metallic material.

The invention relates to the technical field of detection, in particular to nano gamma-aluminum oxide, a preparation method thereof and application of the nano gamma-aluminum oxide in detection of 2-methylacrolein. The preparation method of the nano gamma-Al2O3 comprises the following steps: carrying out hydrothermal reaction on a precursor at 160-200 DEG C, collecting a solid product, washing, drying and calcining; wherein the preparation of the precursor comprises the following steps: mixing a premix with ethyl acetate; the premix is mainly prepared by mixing soluble aluminum salt, a surfactant, alkali and a solvent. The nano gamma-Al2O3 with corresponding properties is prepared by a certain method, can be used as a sensitive material, is used for detecting 2-methylacrolein based on a catalytic luminescence principle, has specific response to 2-methylacrolein, is high in response sensitivity, high in response speed, low in detection limit, good in reproducibility, good in stability and the like, and has a good application prospect.

The invention discloses a sectional material connecting piece. The sectional material connecting piece comprises two connecting parts, each connecting part comprises a base and a rotating part, each base is provided with an attaching face capable of being attached to a sectional material, each rotating part can rotate around a first axis relative to the corresponding base, the first axis is perpendicular to the attaching face, one side of each rotating part is provided with a rotating shaft part, each rotating shaft part is provided with a second axis, the two connecting parts are rotationally connected through the rotating shaft parts, the second axes of the two rotating shaft parts coincide, and the first axis is perpendicular to the second axes. The sectional material connecting piece has the advantages that different connecting angles and relative positions can be presented between two adjacent sectional materials, the connection is accurate and rapid, time and labor are saved, and connection is economical and convenient.

A solid hydrogen power generating device comprises a hydrogen storage device, a hydrogen supply device, a power generating battery device and the like, wherein the hydrogen storage device comprises a hydrogen storage cylinder containing hydrogen storage particles, the average diameter of each hydrogen storage particle ranges from 20 mu m to 200 mu m, and each hydrogen storage particle is provided with an internal cavity surrounded by a porous wall; an air hole is formed in one end of the hydrogen storage cylinder, and a filter is arranged in the air hole; and the hydrogen storage cylinder is made of an Ti-Ni alloy.

A hydrogen storage device made of a non-metal material comprises a hydrogen storage device body, a hydrogen supply device, a power generation battery device and the like, wherein the hydrogen storage device body comprises a hydrogen storage bottle containing hydrogen storage particles, the average diameter of the hydrogen storage particles is in a range of 20 micrometers to 200 micrometers, and each hydrogen storage particle is provided with an inner cavity encircled by a porous wall; a gas hole is formed in one end of the hydrogen storage bottle, and a filter is arranged in the gas hole; and a case of the hydrogen storage bottle adopts a carbon fiber reinforced nylon structure.

The invention provides a large-deformation tunnel body supporting structure of a soft rock tunnel in a wrinkled area and a construction method. A plurality of steel bodies form a grating arch frame of an annular structure, a plurality of steel bodies are arranged on the inner side of the grating arch frame to form a steel arch frame of the annular structure, an outer-layer reinforcing mesh is arranged between the steel arch frame and the grating arch frame, and an inner-layer reinforcing mesh is arranged on the inner wall of the steel arch frame; a lower step arch frame is arranged at the opening position of the bottom of the steel arch frame, and the lower step arch frame and the steel arch frame form a closed loop. A supporting structure of sprayed concrete, a double-layer arch frame, a reinforcing mesh, radial grouting and a steel pipe large locking foot is designed, after an excavation face is initially stabilized through primary spraying of the sprayed concrete, the double-layer arch frame is installed to form a yielding supporting structure, meanwhile, surrounding rock of a loose circle of a tunnel body is solidified through radial grouting, and finally a supporting system is formed by hanging the mesh and re-spraying the concrete to the designed thickness.