20results about How to "Improve diffusivity" patented technology

The utility model discloses a packaging structure capable of improving substrate wiring space and reducing packaging size. The packaging structure comprises a substrate and a plurality of chip dies, the die is flatly laid on the top surface of the substrate and is connected with a contact finger on the substrate; and in the die, the power input end and the grounding input end of the main chip are connected with a power contact PWR finger and a ground contact GND finger on the top surface of the substrate. The front surface of the dummy die is a metal conductive layer, and the back surface of the dummy die is a non-metal insulating layer; the dummy die is divided into a PWR die and a GND die; the back surfaces of the PWR die and the GND die face downwards; the power input end and the grounding input end of the main chip are respectively connected with the front surfaces of the PWR die and the GND die; the PWR finger and the GND finger are respectively connected with the front surfaces of the PWR die and the GND die; a power supply and a grounding output end of the main chip are respectively connected with a power supply and a grounding input end of the auxiliary chip.

The application discloses a SiC reactor for cyclohexanone aminooxidation and a design method thereof, and relates to the technical field of chemical reactors. The SiC reactor comprises a reactor shell, a plurality of reaction channels, a plurality of composite plates, and a plurality of reaction channels. The axis direction of the reaction channel is parallel to the axis direction of the reactor shell. The plurality of composite plates are arranged in the plurality of reaction channels. The flat plate and the corrugated plate made of silicon carbide are arranged in the axial direction of the reaction channel and matched with the rhombic through-hole structure. The fluid in the reaction channel can be disturbed, the radial diffusion effect of the fluid is improved, and the effective residence time of the fluid is prolonged. Based on the excellent heat conduction performance of silicon carbide and the plate combination structure, the heat exchange between the wall surface and the fluid is strengthened, the temperature field distribution in the channel is optimized, the mass transfer and heat transfer conditions of the material are improved, and the generation effect of cyclohexanone oxime is improved.

The application discloses an integrated stretchable flexible wearable biosensor and a preparation method thereof, and belongs to the technical field of electrochemical sensing.The integrated stretchable flexible wearable biosensor is wrapped by a PAN / SiO2 sweat absorption layer.The method comprises the following steps: preparing a stretchable conductive composite fiber; preparing an integrated stretchable flexible sensing fiber; preparing a PAN / SiO2 sweat absorption layer; and preparing a sensor.The conductive composite fiber in the application can maintain stable performance under multiple bending and twisting, the sensor is integrated with a flexible integrated circuit chip and a flexible power supply device to obtain a fabric sensing system, the fabric sensing system can process acquired sensor data, and the detection data can be uploaded to a mobile terminal and a cloud end in real time through Bluetooth technology, real-time monitoring and management of a health condition of the biosensor are realized, six specific biomarkers can be efficiently detected by using only 1 muL of sweat, the amount of sweat required for activating the biosensor is 1 / 3 of that of the prior art, and the fabric sensing system can easily adapt to a tensile strain caused by exercise.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

The utility model discloses a kind of deformation-preventing absorbent core and sanitary towel with it, wherein deformation-preventing absorbent core includes surface layer, water-repellent layer, diffusion layer and bottom layer, surface layer, water-repellent layer, diffusion layer and bottom layer are sequentially arranged and bonded from top to bottom, water-repellent layer is equipped with multiple through holes, through hole is penetrated in the upper and lower surfaces of water-repellent layer, diffusion layer is foamed material article.The utility model utilizes water-repellent layer and diffusion layer to multiple diffusion to liquid, can solve the problem of liquid accumulation, to reach the effect of preventing deformation.

The utility model relates to a reaction kettle stirring device and a reaction kettle, and belongs to the field of mechanical stirring devices, the reaction kettle stirring device comprises a driving device, a transmission device and stirring blades, and the stirring blades at least comprise a first blade and a second blade; the reversing stabilizing mechanism comprises a bracket, a fixed bevel gear and a rotating bevel gear; the transmission device comprises a first transmission shaft and a second transmission shaft which are vertically arranged, and the first transmission shaft and the second transmission shaft are coaxially connected through a reversing stabilizing mechanism; the two fixed bevel gears are vertically and oppositely arranged, and the two rotating bevel gears are transversely and oppositely arranged; the first paddle is fixedly connected to the first transmission shaft, and the second paddle is fixedly connected to the second transmission shaft; the fixed bevel gear and the rotating bevel gear are in meshing transmission to drive the first transmission shaft and the second transmission shaft to rotate oppositely and reversely so as to drive the first paddle and the second paddle to rotate oppositely and reversely. Reverse rotation of the blades is achieved, and reverse thrust torque generated in the rotation process can be counteracted to reduce the influence on the driving device.

The utility model relates to a double-stage electrostatic oil fume treatment unit with fresh air heating and oil stain self-cleaning functions, belonging to the field of high-voltage electrostatic purification of oil fume and the field of fresh air heating. The utility model is to solve the problems of low removal efficiency of oil fume particles caused by the phenomenon of "counter electric field" when high-voltage electrostatic technology purifies oil fume, poor cleaning effect of conventional cleaning measures, high corona voltage, easy air breakdown to form sparks, high risk of fire, and high energy consumption of heating fresh air in winter. The utility model includes an oil fume collecting device, a charging mixing section, a first-stage oil fume treatment section, a second-stage oil fume treatment section, oil fume pipeline components, and fresh air pipeline components. The oil fume collecting device is installed at the inlet end of the oil fume pipeline components. The charging mixing section, the first-stage oil fume treatment section, and the second-stage oil fume treatment section are connected in series in the oil fume pipeline components in the order of the oil fume flow direction. The fresh air pipeline components are installed on the first-stage oil fume treatment section and the second-stage oil fume treatment section. The utility model is used as a device for treating indoor oil fume and preheating indoor fresh air.

The invention discloses a dynamic spiral and bidirectional diffusion image encryption method based on four-dimensional chaos, and relates to the technical field of information security. Comprising the following steps: generating a high-entropy key stream related to a plaintext image based on SHA-512 Hash and a four-dimensional chaotic system; dynamically controlling the direction, the starting point and the step length of spiral traversal by using the key stream, and carrying out layered spiral scrambling on image pixels so as to damage spatial correlation; and performing forward and backward bidirectional diffusion on the scrambled image by using two independent chaotic key sequences in combination with a nonlinear feedback mechanism so as to realize confusion and diffusion of global pixel values. Through the synergistic effect of the chaotic system, the dynamic scrambling and the bidirectional diffusion, the problems that the randomness of a low-dimensional chaotic system is insufficient and the residual correlation of static scrambling and the avalanche effect of unidirectional diffusion are weak are solved, and the security, the randomness and the anti-attack capability of image encryption are remarkably improved.

The invention relates to the technical field of metal welding, and discloses a high-strength tool alloy steel and ceramic composite layer welding process which comprises the following steps: quenching and tempering a substrate, processing a swallow-tail-shaped nano microstructure on a to-be-welded surface of the substrate through femtosecond laser, and then depositing a Ti layer with the thickness of 1 micron through magnetron sputtering, and carrying out heat preservation at 740-760 DEG C in a vacuum furnace for 1 hour for annealing. The contact area of a base body and the brazing filler metal is increased through the dovetail-shaped nanometer microstructure machined through femtosecond laser, a mechanical interlocking foundation is formed, the wettability and the diffusivity of an interface can be improved in cooperation with magnetron sputtering of the Ti layer and subsequent annealing treatment, and then the performance gradient transition of the four layers of gradient brazing filler metal films is achieved. In combination with Ar-H2 mixed plasma bombardment and ceramic layer precise polishing and cleaning, metallurgical reaction conditions of a brazing interface can be optimized, and meanwhile, heat input in the welding process can be controlled through synchronous scanning of the optical fiber laser and the plasma arc and a dynamic temperature feedback regulation and control mechanism.

This invention discloses a USY molecular sieve, its preparation method, and its applications. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 35.0%–55.0% of the total pore volume of the molecular sieve, and the most probable pore size is 23–30 nm. When used as a hydrocracking catalyst, this USY molecular sieve exhibits better adsorption, diffusion, and shape selectivity, resulting in superior reaction performance.

The invention discloses a preparation method of a catalyst for preparing dimethyl carbonate through oxidative carbonylation of methanol. The catalyst comprises the following components (in terms of oxide, a carrier is 85.0 to 92.5 wt% of Al2O3, 5.0 to 11.0 wt% of MgO, 0.1 to 1.0 wt% of Na2O, 1.5 to 3.5 wt% of a Cu-containing compound and 0.5 to 1.5 wt% of a Pd-containing compound. Alpha-beta aluminum oxide added during molding reduces the acidity of the carrier and improves the heat-conducting property of the carrier, and a magnesium-containing compound is added before strip extrusion to modify the carrier, so that the structural stability and the mass transfer property of the catalyst are improved. The catalyst prepared by adopting the technology of the patent is weak in acidity, high in active component dispersity and smooth in catalyst pore channel, and has excellent activity and selectivity when being used for preparing a dimethyl carbonate catalyst through methanol oxidative carbonylation.

The application discloses a neutron gamma composite shielding material and a preparation method thereof. The neutron gamma composite shielding material takes micron plate structure samarium oxide as a neutron and gamma ray absorber, boron carbide as a neutron absorber, and high-density polyethylene as a base material. The micron plate structure samarium oxide filler has a high specific surface area, can increase the probability of interaction with neutron gamma rays, and improve the neutron gamma shielding capacity of the composite material. In addition, high-energy ball milling, dense mixing and other preparation processes are used to reduce the clustering of inorganic fillers in the matrix and improve the interfacial compatibility between the inorganic fillers and the polymer matrix. The neutron gamma composite shielding material disclosed by the application contains micron plate structure samarium oxide, has high thermal stability and mechanical properties, and excellent radiation shielding performance, and can be used in the field of high-performance neutron gamma radiation shielding under a medium and low temperature environment, such as nuclear facility radiation protection, nuclear waste disposal, radiation protection for radiotherapy, and the like.

The application discloses a heating module and a cooking utensil thereof. The heating module comprises a support body and a wire group part, and the wire group part comprises a first wire group and a second wire group. The first wire group and the second wire group are in a polygonal structure. The first wire group is provided with a first corner part in a convex structure, and the second wire group is provided with a second corner part in a convex structure. The first corner part and the second corner part are in a staggered distribution structure. The covering distance of the first wire group along the radial direction of the support body is H0. The vertical distance from the inner edge position of the second corner part to the outer edge position of the corresponding region of the first wire group is H. H is greater than or equal to half of H0 and less than or equal to H0. The vertical distance from the outer edge position of the first corner part to the inner edge position of the corresponding region of the second wire group is H1. H1 is less than half of H0. The cooking utensil comprises the aforementioned heating module. The application solves the problem of poor uniform heating effect caused by concentrated heating of the coil disc on the pot in the existing cooking utensil.

The utility model belongs to the technical field of medical instruments, and discloses a silencing dispersion gas box and a control terminal for a dispersion type oxygenerator, the silencing dispersion gas box comprises a box body and a decorating part, the box body is internally provided with a gas containing cavity, the box body is provided with a gas inlet communicated with the gas containing cavity and a plurality of gas outlet holes communicated with the gas containing cavity, and the decorating part is arranged in the box body. The decorative part is provided with an annular rib surrounding the multiple air outlet holes, the decorative part, the annular rib and the box body jointly form a dispersion cavity, the decorative part is provided with multiple dispersion holes communicated with the dispersion cavity, the number of the dispersion holes is larger than that of the air outlet holes, and then kinetic energy of oxygen exhausted through the dispersion holes is greatly reduced. The noise generated when the silencing dispersion gas box disperses and releases oxygen is greatly reduced, meanwhile, the dispersion effect of the silencing dispersion gas box on the oxygen is greatly improved, and then the use experience of a user is improved.

This utility model discloses a prefabricated moisture-proof and sound-absorbing ceiling, which includes a series of arc-shaped sound absorbers. The arc-shaped sound absorbers are connected to the top beam or floor slab via stainless steel hangers. The arc-shaped sound absorbers include three types: an upwardly concave sound absorber, a first downwardly convex sound absorber, and a second downwardly convex sound absorber. Each upwardly concave sound absorber is adjacent to a first downwardly convex sound absorber and a second downwardly convex sound absorber on both sides, forming an overall wave shape. Each arc-shaped sound absorber includes sound-absorbing cotton, a moisture-proof cloth, and an aluminum plate. This utility model offers excellent moisture and corrosion resistance, good sound absorption, strong structural integrity, and convenient construction.

The application discloses an implementation method of a high-diffusion lightweight block cipher (HDLBC), which comprises the following steps: obtaining plaintext or ciphertext as to-be-encrypted / decrypted data; performing R-round encryption / decryption operation on the to-be-encrypted / decrypted data; each round of encryption operation is to perform RA1 function operation, branch XOR operation, RA2 function operation and P permutation on the to-be-encrypted data; in each round of encryption operation, part of bits in a sub-key participates in round key addition operation in the RA1 function operation; the remaining bits participate in round key addition operation in the RA2 function operation; the decryption operation is performed in the reverse order of the encryption operation, and the order of the sub-key used in the R-round decryption operation is opposite to the order of the sub-key used in the R-round encryption operation. The method designed in the application is an F function based on NAND operation and designed to introduce two F functions to realize round functions affecting all branches, so that the diffusion and area consumption of the algorithm are better ensured.

The utility model relates to a battery field provides a kind of shell structure for battery, battery and electric equipment.Shell structure for battery includes shell body, recess is formed with on the side of shell body towards upper plastic, recess is recessed along the thickness direction of shell body and extends along the radial direction of shell body.This shell structure for battery can quickly, accurately detect the battery of missing seal, timely find problem battery, avoid defective product to flow into subsequent production link, help to improve the overall production efficiency of battery, reduce the time waste caused by manual inspection or other inefficient detection method, so that the battery on production line can quickly pass through detection link, enter next process, speed up the running speed of entire production process.

The application discloses an ultra-stable Y-type molecular sieve and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a first aluminum source, a first alkali source, a first Fe source, a first silicon source and water to obtain an Fe-containing Y molecular sieve directing body; (2) mixing a second aluminum source, a second silicon source, a second Fe source, a second alkali source, water and the directing body in step (1) to obtain a gel; (3) performing crystallization treatment on the gel in step (2); and (4) performing ammonium exchange, hydrothermal treatment and acid washing treatment on the crystallization product obtained in step (3) to obtain the ultra-stable Y-type molecular sieve. When the ultra-stable Y-type molecular sieve prepared by the method is used in a hydrocracking catalyst, the activity and selectivity are both significantly improved.

The application discloses a kind of multi-level hole EUO molecular sieve and its preparation method and application, the morphology of the multi-level hole EUO molecular sieve is fusiform;With micropore and mesopore;The pore volume of micropore is 0.12~0.15cm 3 / g;The pore volume of mesopore is 0.14~0.25cm 3 / g.The synthesis route is prepared by the optimization of silicon-aluminum source and synthesis system ratio and the addition of seed crystal, and the high crystallinity multi-level hole EUO molecular sieve is prepared by one-step hydrothermal crystallization method.The EUO molecular sieve described in the application has excellent diffusion performance due to its larger mesopore pore volume, and has excellent reaction stability in meta-xylene isomerization reaction.