15results about How to "Good industrial value" patented technology

The invention provides an excitation amplitude automatic closed-loop control system and method for a DLCP test. The system comprises a multi-frequency alternating current excitation and direct current bias voltage applying module which is used for automatically applying alternating current excitation signals and direct current bias voltage signals according to a preset excitation amplitude sequence under a plurality of test frequencies; the PID closed-loop control module is used for performing closed-loop correction on the applied voltage according to the response of the test port of the tested semiconductor device, so that the condition of the applied voltage at the test port meets a preset requirement; the capacitance measurement module is used for acquiring an equivalent capacitance response signal of the tested semiconductor device; the capacitance test data caching module is used for performing associated marking and classified caching on the capacitance test data according to the test frequency, the excitation level and the bias voltage set point; and the main control module is used for coordinating automatic test processes under the conditions of a plurality of test frequencies and different excitation amplitudes and outputting corresponding capacitance test data so as to improve the consistency, stability and automation degree of the DLCP test.

The invention belongs to the technical field of microorganisms and compound nutrients, and particularly relates to a postbiotic preparation and composition for improving activity of gamma-aminobutyric acid and promoting calcium absorption and application of the postbiotic preparation and composition in sleep improvement and bone health. Through the synergistic effect of the specific metagen preparation and the gamma-aminobutyric acid, the multi-dimensional technical breakthrough is realized, and the physiological activity and the application value are remarkably improved. In the aspect of bioavailability, the intestinal barrier function is improved and the pH value of the intestinal tract is adjusted to be weakly acidic through the postbiotics, so that the concentration of serum GABA is increased by 2-3 times compared with that of single use, and the calcium absorption rate is increased from 30% to 55-60%. And on the aspect of function synergy, the limitation of single effect in the prior art is broken through, dual-function synergy of'sleep regulation-bone health 'is realized, meanwhile, the vicious circle of'poor sleep-calcium loss' is improved, and good practical application value is achieved.

The application discloses low-cost sulfidized nano zero-valent iron synthesized by using pyrite as raw material and application thereof. The low-cost sulfidized nano zero-valent iron is obtained by using cheap pyrite powder as raw material, adding a small amount of anhydrous FeCl3, and through ball milling, drying and hydrogen reduction. The pyrite powder to which a small amount of anhydrous FeCl3 is added is ball milled by using zirconia ball milling beads which are easy to clean but not easy to be polluted, and then the sulfidized nano zero-valent iron is prepared after drying and reduction. By adjusting parameters such as ball powder ratio, FeCl3 addition amount, heating rate and holding time, the low-cost sulfidized nano zero-valent iron with a particle size of 200-300 nm, zero-valent iron content accounting for more than 90% of total iron content and preparation cost being 11% of that of a laboratory liquid-phase synthesis method is prepared. The material can effectively degrade trichloroethylene (TCE) and florfenicol (FF), has a small hydrogen production amount and a high electron efficiency. The preparation method is simple and easy to operate, has a low cost and has a large-scale production prospect, the degradation performance of pollutants is close to that of the laboratory-prepared sulfidized nano zero-valent iron, and far exceeds that of nano zero-valent iron, and therefore the material has a prospect of being applied to actual groundwater pollution remediation.

The application discloses a preparation process of a high-performance Cu-Ni-Fe alloy based on first-principle calculation design, and relates to the technical field of alloy material preparation. The process constructs a precise Cu-Ni-Fe ternary alloy thermodynamic database by combining a first principle with a CALPHAD method, determines a composition range based on database calculation of a multivariate phase diagram, optimizes the composition by calculating a work function, an elastic constant and a thermal expansion coefficient through a first principle, and obtains a finished product through smelting, heat treatment and forming processing. The final alloy has an atomic percentage composition of Cu 30%-75%, Ni 10%-30% and Fe 10%-30%, a tensile strength of greater than or equal to 816.4 MPa, a total elongation at break of greater than or equal to 34.27%, and a thermal expansion coefficient of less than 20*10 ‑6 / K, and has excellent mechanical properties and thermal stability, thereby solving the problems of blind composition design and large performance fluctuation of a traditional process and being suitable for multiple fields such as ocean engineering and electronic packaging.

This invention provides a semiconductor device based on encapsulated graphene nanoribbons and its fabrication method. The semiconductor device includes: a substrate, encapsulated graphene nanoribbons located thereon, and corresponding metal electrodes. The encapsulated graphene nanoribbons includes: an insulating encapsulation with atomic-level flatness, the insulating encapsulation being formed by at least two atomic layers stacked in parallel, with adjacent atomic layers bonded by van der Waals forces; at least one longitudinal section extending along the thickness direction of the insulating encapsulation; and at least one graphene nanoribbon, which breaks through the van der Waals forces of any two adjacent atomic layers exposed on the longitudinal section and embeds itself between the two atomic layers. The graphene nanoribbons used in this semiconductor device are encapsulated in an insulating encapsulation with atomic-level flatness, isolating them from the external environment, thus giving them properties close to those of intrinsic nanoribbons, resulting in high-quality, high-performance carbon-based electronic devices. Furthermore, the fabrication method is simple, low-cost, and can be mass-produced.

This invention discloses a control method and system for a high-temperature coating furnace for pyrolytic graphite, belonging to the field of material preparation and high-temperature heat treatment technology. It solves the problems of poor deposition uniformity, contradiction between deposition efficiency and quality, and poor process repeatability that exist in coating furnace control methods when preparing workpieces. The technical solution includes the following steps: The substrate to be deposited is placed in the furnace chamber of the high-temperature coating furnace for pyrolytic graphite and pretreated; the pretreated substrate is subjected to multi-stage variable temperature and flow rate deposition control to complete the deposition operation. The multi-stage variable temperature and flow rate deposition control includes four sub-stages performed sequentially: preheating and degassing, interface nucleation, stable growth, and final densification; after the deposition operation is completed, the substrate is cooled, and the substrate coated with pyrolytic graphite is removed. This invention is applied to coating furnaces.

The application discloses a green preparation method of 4,4'-difluorobenzophenone. The method uses 4,4'-difluorobenzene as raw material, potassium bromide as catalyst, acetic acid as solvent, and oxygen as oxidant, and 4,4'-difluorobenzophenone is generated in high selectivity through one-step oxidation under mild conditions. The application surprisingly finds that in the presence of potassium bromide, a new non-metallic catalytic oxidation system of potassium bromide / acetic acid / oxygen is used to realize high-efficiency and high-selectivity conversion of the C-H bond at the benzyl position. Compared with the traditional method, the application does not need to use a transition metal catalyst, does not need to use carbon tetrachloride and other materials damaging the ozone layer, and does not need to involve a dangerous intermediate such as a diazonium salt, the process route is short, the atomic economy is high, the product yield is high, the product purity is high, the catalyst is cheap and easy to obtain, and the application has excellent industrial application prospect and green chemistry characteristics.

The invention discloses an ammonia decomposition hydrogen production catalyst and a preparation method and application thereof, and belongs to the technical field of catalytic chemistry and hydrogen energy. According to the preparation method of the catalyst for hydrogen production through ammonia decomposition, the problems that an existing catalyst is poor in low-temperature activity and low in mass transfer efficiency are solved through process optimization such as carrier circulation modification and two-stage roasting. The prepared catalyst is high in activity, can realize efficient decomposition of NH3 at low temperature, is wide in adaptive airspeed, can still realize high conversion rate of NH3 at high airspeed, has ammonia decomposition conversion rate of more than or equal to 90% under the conditions of 400-550 DEG C, normal pressure and ammonia airspeed of 1000-30000 ml / g.h, and has remarkable industrial value.

The application relates to the field of water treatment membrane separation technology and discloses a composite flocculus modified ultrafiltration membrane and a preparation method and application thereof. The preparation method comprises the following steps: (1) under the condition that the pH value is 8.0-9.0, a cationic polyacrylamide solution and a polyaluminum chloride solution are subjected to a contact reaction in the presence of ultrapure water to obtain a composite flocculus suspension; and (2) under the action of a transmembrane pressure, the composite flocculus suspension passes through an ultrafiltration membrane, the composite flocculus in the composite flocculus suspension is pre-deposited on the surface of the ultrafiltration membrane to form a functional separation layer, and the composite flocculus modified ultrafiltration membrane is obtained. The composite flocculus pre-deposited modified ultrafiltration membrane of the cationic polyacrylamide and the polyaluminum chloride has a perfluorinated compound interception rate of not less than 70 wt%, stable performance under complex water quality conditions, simple preparation process, low cost and a good industrial application prospect.

This invention discloses a self-cleaning and dust-resistant polyurethane synthetic leather and its preparation method, belonging to the field of polyurethane technology. The self-cleaning and dust-resistant polyurethane synthetic leather comprises an isocyanate-terminated polyurethane prepolymer, an N-doped titanium dioxide photocatalyst, a polyether / siloxane hybrid phosphate modifier, and various additives. This invention enhances the intrinsic photocatalytic activity of TiO2 through N-doping without altering its crystal structure. A self-designed hybrid phosphate modifier achieves N-TiO2 chemical anchoring and surface-oriented enrichment, significantly improving the utilization rate of active sites and achieving TiO2 reduction without sacrificing efficiency. Simultaneously, a dust-resistant, antistatic, and self-cleaning synergistic system is constructed to maintain long-term self-cleaning properties, while simultaneously optimizing the mechanical and weather-resistant properties of the synthetic leather. It is compatible with existing mass production processes and has significant industrialization value.

This invention discloses a high-performance wrought magnesium-lithium alloy, comprising the following components by mass percentage: Li 4.8%~5.3%, Zn 5.7%~6.2%, Y 1.8%~2.3%, with the balance being Mg. The alloy is prepared as follows: 1. Raw materials of each component are taken according to the mass percentage of the target magnesium-lithium alloy, and smelted and cast to obtain a magnesium-lithium alloy ingot; 2. The magnesium-lithium alloy ingot is subjected to homogenization heat treatment; 3. After low-temperature preheating, it is subjected to low-temperature extrusion and cooled to room temperature. The magnesium-lithium alloy of this invention, by adding Zn and Y elements, introduces a network W phase, MgZn phase, and MgY phase as reinforcing phases to strengthen the alloy. Combined with the homogenization heat treatment followed by low-temperature extrusion deformation in the preparation process, cold forming capability is increased, and the second phase is effectively broken up, synergistically improving the strength and plastic mechanical properties of the magnesium-lithium alloy, making it suitable for aerospace and other fields.

The invention discloses a low-odor PC / ABS alloy and a preparation method thereof, and belongs to the technical field of alloy materials, the alloy material comprises the following components by weight: 65-75 parts of PC resin, 25-35 parts of ABS resin, 2-8 parts of lanthanum modified diatomite, 3-5 parts of a compatilizer, 0.5-2 parts of a POSS-based deodorant, and 0.1-0.5 part of an initiator; the POSS-based deodorant is a polyhedral oligomeric silsesquioxane derivative, the molecular structure of the POSS-based deodorant contains a vinyl group, an epoxy group and a siloxane group at the same time, through the synergistic effect of the POSS-based deodorant and the lanthanum-modified diatomite, a multi-target deodorization system for generation inhibition, chemical capture and physical adsorption is constructed, the mechanical property of the PC / ABS alloy is maintained, and meanwhile the mechanical property of the PC / ABS alloy is improved. Source inhibition and whole-process control of VOC are achieved, the odor grade and the TVOC release amount are greatly reduced, and the long-acting and stable low-odor effect is achieved.

The invention provides a hydrogel composite microneedle as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a mixed solution from a sodium hydroxide solution and a phosphate solution; a uniform and transparent solution is obtained from the low-molecular sodium hyaluronate and the mixed solution; obtaining a first uniform solution from the uniform transparent solution, N, N-dimethylformamide and methacrylic anhydride; adjusting the pH value of the first uniform solution to obtain a second uniform solution; utilizing the second uniform solution to obtain a white flocculent solution; obtaining a white precipitate through the white flocculent solution; dissolving the white precipitate in ultrapure water, and dialyzing to obtain dialyzed liquid; performing vacuum freeze drying on the dialyzed liquid to obtain a MeHA solid; obtaining an M-G solution through the MeHA solid; and obtaining the hydrogel composite microneedle by using the M-G solution. According to the method, the sample extraction efficiency is improved through an extraction and detection two-step method, and stable signals can be kept in the detection process.

The application discloses low-cost sulfidized nano zero-valent iron based on a pyrite oxidation-reduction path and application thereof. Low-cost sulfidized nano zero-valent iron is obtained by the mode of air oxidation and then hydrogen reduction of cheap pyrite powder in a tube furnace. By adjusting and controlling parameters such as oxidation temperature, oxidation time and reduction time, the low-cost lattice-doped sulfidized nano zero-valent iron with a median particle size of less than 300 nm and a zero-valent iron content of 70% is prepared, and the preparation cost is far lower than that of a laboratory liquid-phase synthesis method. The material can effectively degrade trichloroethylene and florfenicol, and has a small hydrogen production amount and a high electron efficiency. The preparation method is simple and easy to operate, and has a large-scale production prospect, and the degradation performance of pollutants is close to that of laboratory-prepared sulfidized nano zero-valent iron, so the material has a prospect of being applied to actual groundwater pollution remediation.

This invention discloses a method for detecting drying defects in battery electrodes based on infrared thermal imaging, relating to the field of battery electrode technology. The method includes: acquiring a sequence of infrared thermal images of the battery electrode during continuous transport after drying, and simultaneously acquiring the spatial position and motion state information of the image frames to construct a spatial thermal image data array bound to the frame index; performing boundary extraction and contour analysis on the thermal image data array to identify boundary disturbance regions and generate corresponding structural deformation target regions; within the structural deformation target regions, extracting thermal diffusion directionality information based on temperature distribution characteristics in the multi-frame image sequence, and identifying abnormal thermal diffusion regions. This invention identifies local abnormal heat conduction regions by simultaneously extracting boundary disturbance features and temperature change vector information from the thermal image sequence, constructing a main thermal diffusion direction vector field, and calculating a thermal diffusion symmetry breaking factor based on a preset factor fusion rule.