353results about How to "The experiment process is simple" patented technology

The invention discloses a preparation method for preparing manganese dioxides in various crystal forms, comprising the following steps of: with divalent manganese salt as a reducing agent and potassium permanganate as an oxidant, adjusting the ratio of raw materials, and reacting in a reaction kettle at 160 DEG C for 1-12h to synthesize both one-dimensional alpha-MnO2 nano fibers and beta-MnO2 nano bars and gamma-MnO2 flower-like structures. The preparation method is simple in preparation process and low in cost; and the product can be used for the research in fields such as super capacitor direction, catalysis and the like.

The invention discloses an apparatus and a method for testing cementation capability of well cementation first and second interfaces under high-temperature high-pressure conditions. The apparatus is mainly composed of a kettle body, an outer pressure pump, an inner pressure pump, a heating belt, a surrounding pressure sleeve, an inner pressure pipe, a nitrogen source, a rotor flow meter, an observation conical flask, an outer pressure sensor, an outer galvanic couple, an inner pressure sensor, an inner galvanic couple, a gas-liquid discharge valve and a computer. The method comprises: (1) sleeving an imitated rock core with the surrounding pressure sleeve, putting in the kettle body and pouring a drilling fluid; (2) heating the kettle body, injecting a pressure P1 into the drilling fluid, and maintaining for 3 d to form an artificial mud cake; (3) pouring a cement slurry into an annular space formed by the inner pressure pipe and the imitated rock core, setting the temperature as a downhole temperature T1, pressurizing to a surrounding pressure P2 needed by an experiment, and maintaining for 3 d to form a cement sheath; and (4) pressurizing the interior of the inner pressure pipe to a pressure P3 needed by the experiment, and testing the cementation capability of the first and the second interfaces. The principle is reliable, the apparatus and the method are capable of accurately testing the cementation capability of the well cementation first and second interfaces under the high-temperature high-pressure conditions, and the evaluation result is relatively precise.

The invention discloses a making method of Li-La-Ti oxide in the lithium ion battery domain, which comprises the following steps: adopting lithium nitrate, lanthanum nitrate and butyl titanate as raw material with molecular formula as Li3xLa2/3-xTiO3 (0<x<0.16); setting the molar rate of Li, La and Ti at 1: 1: 2; adopting alcohol or ethylene glycol monomethyl ether as solvent; or adjusting pH value under 1 through water and acetate; drying solution; sintering under 800-900 deg.c for 2h; obtaining pure LLTO. the invention shortens experimental period and synthesizing temperature with grain size about 200nm, which possesses excellent compact and electric property.

Systems and methods for integrating, building, and publishing pages of content are described that provide third parties the ability to present their products and services together with a host's content through a content management and publishing platform. Content is selected from the host or the third party. The page can be on the host's server or on the third party's sever. The content management and publishing platform utilizes a flexible template and database-driven architecture. A toolset is provided with the template that allows users to interactively select and program content accessed through APIs.

The invention provides a shale compressibility comprehensive evaluation method based on uniaxial strength experiment. The method comprises the steps of (1) taking a shale core sample for executing uniaxial compressive strength test, testing an elasticity parameter, and drawing a stress-strain curve diagram; (2) calculating normalized elasticity modulus and normalized poisson ratio to obtain a brittleness index; (3) obtaining key points on the stress-strain curve, and calculating the shape index of the stress-strain curve; (4) obtaining fracture distribution diagram of the side face of the fixed sample, and calculating a fracture distribution index through box-counting dimension method; (5) measuring spallation fragment mass distribution at different scales through a screen and a balance so as to obtain a block distribution index; and (6) calculating arithmetic mean value of the obtained brittleness index, shape index of the stress-strain curve, fracture distribution index and block distribution index of fragments to get the comprehensive compressibility index. The method provided by the invention is used for evaluating fracture net forming capability of the shale after being compressed, the experiment is simple and easy to carry out, and post treatment is visual and simple, so that the method is suitable for indoor evaluation and oilfield in-site application.

The invention relates to a high-specific surface area nanometer mesoporous silicon carbide hollow ball and a preparation method thereof. The preparation method comprises dropwisely adding different amounts of silica precursor tetraethoxysilane into water-anhydrous ethanol mixed solutions with different ratios so that the silica precursor tetraethoxysilane is hydrolyzed into silica solid nanospheres with different diameters, dispersing the silica solid nanospheres in distilled water with different volumes, carrying out thermal insulation for a certain time to obtain nanometer mesoporous silicon carbide hollow balls with different diameters are obtained, coating the inner and outer shells of the nanometer mesoporous silicon carbide hollow ball with an organic matter layer so that the organic matter is insert into the shell walls, carrying out carbonization, mixing the reaction product, magnesium powder and a metal salt to obtain a uniform mixture, and carrying out thermal insulation in an inert atmosphere for some hours to obtain nanometer mesoporous silicon carbide hollow balls with uniform structures and adjustable sizes. The preparation method has a low reaction temperature and a low cost. The obtained hollow silicon carbide has the advantages of uniform structure, adjustable sizes, superhigh specific surface area of 648m<2>/g and excellent mesoporous structure.

The present invention belongs to the field of micron/nanometer fiber preparing technology, and is especially no-solvent electrically spinning and ultraviolet curing process for preparing micron/nanometer fiber. The reacted components include acrylate oligomer, active diluent and photoinitiator. The process includes pre-polymerizing to form oligomer, electrically spinning while irradiating with ultraviolet ray to decompose the photoinitiator for generating free radical initiating the polymerization of the pre-polymer and splitting fiber to generate micron/nanometer fiber. The process has material utilizing rate as high as 100 %, no environmental pollution caused by volatized solvent and low production cost.

The invention discloses a method for measuring a dynamic capillary pressure of a core. The method comprises the following steps of: washing, drying and evacuating the core; saturating the core with a first fluid; putting the saturated core into a core clamp holder by using core displacement equipment; setting an experimental temperature; completely saturating dead volume parts of pipelines at an upstream end and a downstream end of the core with the first fluid; simultaneously setting a return pressure as a strata pressure; keeping a constant pressure and injecting the first fluid; after the upstream and downstream differential pressure of the core is stable, stopping injecting the first fluid; injecting a second fluid, wherein the second fluid is injected into a pipeline at the upstream end of the core under the same differential pressure as that of the first fluid; displacing the first fluid in a dead volume of the pipeline at the upstream end and making the first fluid enter the core; recording the change of the accumulated flow at the outlet end of the core along with time in the process of injecting the second fluid; and measuring the dynamic capillary pressure by calculating. The method of the invention has a simple process, is easy to operate, and is rapid and accurate.

The present invention relates to the removal of bilirubin from blood, and is especially cyclodextrin crossed polymer microsphere for adsorbing bilirubin and its preparation and application. The microsphere is prepared with diisocyanate as crosslinking agent and through condensation with cyclodextrin monomer. The polymer microsphere of the present invention has low cost and results in simplified experiment process, and the efficient removal of bilirubin with the polymer microsphere shows that the said material has excellent clinical application latent.

The invention discloses a preparation method for a stannic disulfide/graphene nanocomposite, a negative electrode of a lithium ion battery, and the lithium ion battery. The preparation method comprises the following steps of performing a hydrothermal process and a compounding process. By adoption of the preparation method, the stannic disulfide is subjected to direct in-situ growth on the surface of graphene; then the obtained stannic disulfide is washed and dried to obtain the sheet-shaped stannic disulfide/graphene nanocomposite; the material is applied to the negative electrode material of the lithium ion battery; the stability and the conductivity of the material are effectively improved; the performance of the battery is improved; and the stannic disulfide/graphene nanocomposite has the advantages of high cycling stability, high specific energy density and the like.

The invention, a testing method for mode I crack dynamic fracture overall process parameters under blast loading, discloses the testing method for the dynamic crack initiation toughness, dynamic expansion toughness and dynamic crack arrest toughness of mode I crack under blast loading, and belongs to the technical field of geotechnical engineering. The configuration of an internal single crack disc specimen with a large size is an autonomous design; testing results cannot be influenced by reflected extension waves and transmission waves; and the method is suitable for researching the crack growth rate and growth behavior of the whole process. Blast loading adopts an 8# detonator; numeral calculation adopts a finite element difference software AUTODYN; and a result basically accords with atest. A load stress time history curve can be input into a finite element program ABAQUS; the time history curve of a dynamic stress intensity factor can be obtained; and the dynamic fracture toughness of a material can be determined through the fracture time of a crack. The specimen is simple in configuration and easy in processing; the test is concise and clear in process and convenient in operation; and researches on crack dynamic growth behavior and tests on the dynamic fracture toughness can be realized.

The invention relates to a preparation method of a nano-material with bismuth oxybromide loaded on a cobalt nickel hydrotalcite surface. The method includes: taking Co-Ni-Br LDH as the precursor, slowly adding a mixed solution of bismuth nitrate and mannitol dropwise, conducting stirring in a 40DEG C oil bath pan for 1h, subjecting the product to centrifugal separation and performing cleaning with a lot of water and ethanol, and finally drying the product in a 60DEG C oven. According to the method, through scanning electron microscopy (SEM) observation on the prepared BiOBr-Co-Ni-No3 LDHs nano-material, BiOBr nanosheets are crosswise stacked on the cobalt nickel hydrotalcite sheet layer irregularly, so that dyes of different types can be efficiently degraded under ultraviolet light, also a phenol organic solution can also be degraded, and a good recycle rate can be achieved. The efficient photocatalytic property is attributed to that bismuth oxybromide and cobalt nickel hydrotalcite have the similar layered structure, and the heterojunction formed by loading of the two realizes effective separation and transfer of electrons and holes.

The present invention discloses a preparation method of a semi-polar m-plane GaN base semiconductor device containing a SiNx insertion layer. The preparation method mainly comprises: (1)placing a m-plane sapphire substrate in a MOCVD reaction chamber, introducing hydrogen gas and ammonia gas mixed gas, and carrying out a heat treatment on the substrate; (2) growing a low temperature AlN nucleation layer with a thickness of 15-40 nm on the substrate; (3) growing a high temperature AlN nucleation layer with a thickness of 90-150 nm on the low temperature nucleation layer; (4) growing a GaN buffer layer with a thickness of 1000-2500 nm on the AlN nucleation layer; (5) depositing a SiNx insertion layer on the m-plane GaN buffer lay and in the PECVD; and (6) growing a GaN epitaxial layer with a thickness of 4000-6000 nm on the SiNx insertion layer. The m-plane GaN film has the advantage of low defect, and can be used for production of the semi-polar m-plane GaN light-emitting diodes.

The invention discloses a method for obtaining anatomical structural atlas for a target mouse based on XCT image non-rigid registration. The method includes basic steps of setting Digimouse model as referential mouse anatomical structural atlas, setting XCT images corresponding to Digimouse as referential images, obtaining and pretreating XCT images of the target mouse, building referential images to registration mapping matrix of the target images by non-rigid registration technology, acting registration mapping matrix onto the referential mouse anatomical structural atlas to build a target mouse anatomical structural atlas and mark tissue and organs of the target mouse. The registration method is high in precision, and tissue and organs of a mouse can be marked on a mouse XCT image in a simple and easy way through image registration method. The method is also applicable to other medical science application fields, such as brain structure research, i.e. the anatomical structure of a target brain can be obtained by standard brain anatomical images.

The invention relates to a high temperature and high pressure multiphase fluid comprehensive tester, which comprises a fluid storage and output system, a high temperature and high pressure simulation system, a fluid solubility analysis and testing system, a sampler, a data collector and a computer host machine, wherein a reaction chamber is arranged in the high temperature and high pressure simulation system, the fluid storage and output system is communicated to a gas inlet, the communicated pipeline is provided with a gas mass and flow rate meter, the gas mass and flow rate meter is sequentially connected to the data collector and the computer host machine, the high temperature and high pressure simulation system is provided with a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are respectively connected to the data collector, the sampler is used for sampling a fluid to be detected in the reaction chamber, and the fluid to be detected can be subjected to solubility analysis and testing in the fluid solubility analysis and testing system. According to the present invention, the high temperature and high pressure multiphase fluid comprehensive tester has advantages of simple structure, high test precision, controlled experiment temperature, controlled experiment pressure and controlled experiment volume, can stably work for a long time under the high temperature and high pressure conditions, and is used for the accurate testing of the fluid phase, the fluid property and the solubility.

The invention provides a method for measuring a cadmium isotope ratio in rice by using a multi-receiving inductance coupling plasma mass spectrum. The method comprises the following steps: 1, performing microwave digestion on a rice sample to measure the content of total cadmium; 2, performing microwave digestion on the rice sample to measure the content of total cadmium in a separated and purified rice sample, thereby obtaining a separation and purification rate; 3, performing microwave digestion on a to-be-measured rice sample, and performing separation and purification to obtain to-be-measured liquid; and 4, measuring the cadmium isotope ratio in the to-be-measured liquid by using the multi-receiving inductance coupling plasma mass spectrum, wherein the separation and purification process specifically comprises the following steps: a, converting a nitric acid medium of a digestion solution into a hydrochloric acid medium; b, leaching the digestion solution of the hydrochloric acid medium for five times by using hydrochloric acid, and then leaching for two times by using Milli-Q water to obtain a leachate; c, eluting and collecting the leachate; and d, converting an eluting solution into a nitric acid medium from a hydrochloric acid medium. By adopting the method provided by the invention, the technical problem of separating and purifying cadmium from a rice sample low in cadmium content is solved, and a cadmium pollution source can be quickly and accurately restored, so that the method has a good application value.

The invention discloses a composite nanofiltration membrane containing organically modified attapulgite and a preparation method thereof. The nanofiltration membrane is prepared by: (1) contacting a porous polysulfone supporting layer and a water phase solution containing reaction monomers; (2) rolling the porous polysulfone supporting layer having been dipped in the water phase by a rubber roller to remove the excess water phase solution; (3) contacting the porous polysulfone supporting layer treated in the step (2) and an organic phase solution containing reaction monomers and the purified and organically modified attapulgite to obtain a composite membrane; and (4) drying the composite membrane, allowing the composite membrane to stand, and washing the composite membrane with water to obtain the composite nanofiltration membrane. The purified attapulgite modified with a quaternary ammonium salt is introduced in an interfacial polymerization process, thus enhancing permeability of the composite nanofiltration membrane.

The invention discloses an environment controllable type atomic force microscope-based numerical control rotary type probe switching device. The environment controllable type atomic force microscope-based numerical control rotary type probe switching device comprises a cavity upper cover and a probe switching structure. An irregular rectangular boss, an inner groove, a rectangular light window structure and a sealing flange structure are arranged on the cavity upper cover. The environment controllable type atomic force microscope-based numerical control rotary type probe switching device has the following prominent advantages: 1) due to the design of the irregular rectangular boss, the inner groove, the rectangular light window structure and the sealing flange structure, the internal working space of the cavity is obviously increased and the space utilization rate is effectively increased; 2) due to asymmetrical cooperative design of the inner groove, an L-shaped transitional plate connecting structure, a probe bracket and a probe carrying block, the laser vertical focusing height and the focusing position are effectively guaranteed; and 3) efficient and accurate switching of 8 probes with different functions is realized through program control and in different working environments of vacuum, atmosphere, liquid and the like, so that the functions of surface shape scanning, Raman spectrum analysis, microscopic friction wear and friction coefficient measurement are realized in situ in the same working environment.

The invention provides a measurement method and device for large-curvature-radius non-zero-digit interference based on a virtual Newton's ring. Circular carrier-frequency Newton's ring interferograms are converted into linear carrier-frequency interferograms via second-order polar coordinates, a low-frequency moire fringe graph after low-pass filtering is demodulated, wavefront differential data between a to-be-measured spherical surface and a standard spherical surface is extracted, and a calculation formula of the curvature radius is derived. On the basis of a model of a ZEMAX software based Fizeau spherical large-curvature-radium non-zero-digit detection system, a finite iteration method is used correct backhaul errors during Newton's ring interferogram collection in non-zero-digit detection. The Fizeau spherical large-curvature-radium non-zero-digit detection system is constructed, and verification for the spherical large-curvature-radium non-zero-digit measurement technology based on the virtual Newton's ring is completed.