12results about How to "Avoid excessive concentration" patented technology

The invention discloses a method and a device for generating a commodity pool based on a new machine recommendation algorithm of big data. The method comprises the following steps: constructing a basic view through a Spark framework; performing popularity quantitative evaluation through a commodity popularity scoring model, and respectively screening out hot-sell commodities and new commodities; performing data matching through an SQL linked table query operation, and generating an initial candidate commodity set and a quantity target value of each type of commodities; calculating to obtain a comprehensive score through a multi-objective optimization model; partition-level commodity filtering and optimization are carried out through a MapReduce programming model, and an optimized commodity candidate pool is obtained; performing commodity compliance verification according to items of the white list, and based on a forbidden list in the dimension list black list, adding just-needed categories according to scene requirements through reverse connection operation to obtain a final commodity candidate pool; and merging the commodity data in the final commodity candidate pool into a hive table for persistent storage. The problems that in the prior art, consumption behavior recognition is lacked, and the requirement of a special scene cannot be met are solved.

The invention relates to the technical field of diversion trenches, in particular to a rainwater confluence anti-scouring diversion trench device for a closure slope, which comprises a diversion cylinder, an annular diversion strip arranged in the diversion cylinder, a diversion plate and a diversion cylinder support plate fixedly arranged on the outer side surface of the diversion cylinder, a filter plate arranged on the diversion cylinder, and a mud blocking box arranged on the filter plate. The mud blocking box comprises a mud blocking base and a mud blocking plate, and a mud blocking net is fixedly arranged on the mud blocking plate. The annular flow guide strips arranged in the flow guide cylinder can guide water flow to form annular rotation, water flow deposition is avoided, the flow guide efficiency is improved, the flow guide holes are matched with the filter holes in the filter plate to be connected with the flow guide cylinder, impurities in rainwater can be intercepted, the mud blocking box on the filter plate can further intercept fine silt, blockage is reduced, and all parts of the whole device work cooperatively; from multi-stage filtration to stable diversion, rainwater is effectively prevented from scouring the closure slope, the slope environment is protected, the structure is reasonable, installation and maintenance are convenient, long-term stable operation can be achieved, and the operation cost is reduced.

The invention provides a gradient doping method, which comprises the following steps of: transferring thickness gradient information of a photoresist layer to an ion implantation barrier layer by utilizing a photomask of which the light transmittance changes in a gradient manner along a preset direction and photoetching and etching processes, and realizing gradient doping of a substrate on the basis of the thickness gradient information to obtain a well or a channel with non-uniformly distributed current carriers; the problem of electric field concentration of the field effect transistor is reversely improved, so that the problem of leakage-induced barrier reduction caused by electric field distribution concentration in the short-channel field effect transistor is effectively solved, the electric field distribution of the device is optimized, excessive concentration of the electric field in a local area is avoided, and the performance and reliability of the device are remarkably improved.

An electrical interconnect structure and its formation method, as well as a panel-level packaging structure, are disclosed. The electrical interconnect structure includes: several conductive structures, the surfaces of which have been roughened to form micro-pit structures; and a molding compound layer covering the sidewalls of the conductive structures. The roughened sidewalls of the conductive structures form micro-pit morphologies. This three-dimensional porous structure significantly increases the actual contact area between the conductive structures and the molding compound layer, enabling a tight mechanical bond at the interface of the two dissimilar materials. After the molding compound layer completely covers the roughened sidewalls of the conductive structures, the molding compound material is embedded within the micro-pit structures, generating a significant anchoring effect and effectively suppressing interface delamination. When the packaging structure experiences temperature changes or is subjected to external mechanical loads, the increased interfacial adhesion can uniformly disperse stress, preventing excessive stress concentration at the interface between the conductive structures and the molding compound layer, thereby preventing the generation and propagation of cracks and significantly improving the long-term reliability and failure resistance of the packaging structure.

This application discloses a cryogenic liquid cargo storage tank and a vessel for transporting liquefied products. The cryogenic liquid cargo storage tank includes a tank wall, a leak-proof sealing layer, and a thermal insulation barrier. The leak-proof sealing layer includes multiple corrugated plates with flat and corrugated portions. The thermal insulation barrier includes multiple insulation modules, with the corrugated portions facing the insulation modules. Each insulation module includes multiple accommodating spaces for housing the corrugated portions, and slits are provided in the areas of the accommodating spaces that support the corrugated portions. The vessel includes a hull and the aforementioned cryogenic liquid cargo storage tank disposed within the hull. By providing slits in the support areas of the insulation modules, this application effectively alleviates the concentrated stress transmitted to the insulation modules due to corrugated plate deformation, thereby protecting the insulation modules from damage and improving the structural integrity of the thermal insulation barrier and the reliability of the storage tank.

The utility model discloses a safe double-sided PCB circuit board, and specifically relates to the technical field of PCBs. The safe double-sided PCB comprises a heat-conducting plate layer, the heat-conducting plate layer is made of copper or other high-heat-conductivity materials, base layers are fixed to the two sides of the heat-conducting plate layer, copper foil layers are fixed to the sides, away from each other, of the two base layers, and solder mask layers cover the sides, away from each other, of the two copper foil layers. Electrical components are located on the solder mask layer, the base layer is made of glass fiber reinforced epoxy resin and has excellent insulation performance and mechanical strength, a circuit is etched on the copper foil layer, wires and connection points in the circuit can be formed, and electrical connection between electronic components is achieved. The safety type double-sided PCB provided by the utility model can prevent heat from being excessively concentrated in a local area, thereby reducing the probability that electrical elements are damaged due to high temperature, and enabling the use of the PCB to be safer.

The application relates to the technical field of mineral spring mineralization equipment, in particular to a mineralization filter core component, a filter core device and mineral spring mineralization equipment. The mineralization filter core component comprises a shell, the inside of the shell is provided with a pre-filter cavity and a mineralization filter cavity, the pre-filter cavity and the mineralization filter cavity are relatively isolated and are communicated through a pressure conducting component, the pressure conducting component is conducted under the action of water flow pressure to make the pre-filter cavity and the mineralization filter cavity be in series connection; the pre-filter cavity is provided with pre-filter material, the mineralization filter cavity is provided with mineralization filter material, the shell is provided with a water inlet interface and a water outlet interface, the water inlet interface is communicated with the pre-filter cavity, and the water outlet interface is communicated with the mineralization filter cavity. The mineralization filter core component, the filter core device and the mineral spring mineralization equipment provided by the application can effectively prevent the mineralization water concentration discharged from the mineralization filter core component from exceeding the standard because the pre-filter cavity and the mineralization filter cavity are relatively isolated, the volume of high-concentration mineralization water is small, and the high-concentration mineralization water can be quickly diluted.

The utility model relates to the technical field of machine manufacturing, in particular to a rapid positioning and clamping tool for a stamping die. The punching device comprises a workbench body, a hydraulic device is fixedly connected to the top of the workbench body, a punching frame is fixedly connected to the end, away from the workbench body, of the hydraulic device, a punching block is fixedly connected to the bottom of the punching frame, a positioning assembly is arranged at the top of the workbench body, and a clamping assembly is slidably connected to an inner cavity of the positioning assembly. The clamping assembly comprises a sliding block sliding on the surface of the positioning assembly, and a sliding groove is formed in the surface of the sliding block. The sliding block drives the anti-skid clamping plate to provide pre-tightening force, it is guaranteed that the plate is accurately positioned before stamping, in the stamping process, the damper can automatically stretch out and draw back along with displacement generated by thinning of the plate, the pressure of the anti-skid clamping plate on the plate is adjusted in real time, excessive concentration of the clamping force is avoided, and the stamping quality is improved. And meanwhile, the situation that the edges of the plates are extruded to generate wrinkles and wave-shaped deformation due to excessive clamping force is avoided.

The invention provides a simulated annealing algorithm and gravity operation-based chip layout method, a medium and equipment. The method comprises the following steps of: forming a typesetting block diagram and a chip block diagram according to a typesetting area and the size of a to-be-laid chip; iteratively updating the layout scheme of the chip block diagram based on an annealing algorithm until a global optimal layout scheme is output; the process of updating the layout scheme comprises the following steps: sequentially carrying out disturbance processing and gravity operation in the current layout scheme; the gravity operation comprises the following steps: moving a chip block diagram in the typesetting block diagram to a first gravity point; moving chip block diagrams outside the typesetting block diagram to a second gravity point or a third gravity point; the first gravity point is any vertex of the typesetting block diagram, and the second gravity point and the third gravity point are vertexes sharing the same edge with the first gravity point respectively. According to the invention, based on the framework of the existing simulated annealing algorithm, the updating efficiency of the layout scheme is accelerated through the set gravity operation, and the number of iterations and the layout time can be effectively reduced.

The invention discloses wastewater treatment equipment for antimony-free reverse osmosis membrane production, and belongs to the technical field of wastewater treatment. In order to solve the problem that the circulation efficiency of wastewater in a sedimentation tank is low when the conventional product is used for treating the wastewater, the invention provides the following technical scheme: the wastewater treatment device comprises a pretreatment unit, a secondary treatment unit and a fine purification unit, and the secondary treatment unit comprises a chemical treatment process and a biological treatment process. The internal space of the sedimentation tank is divided into two parts, and the feeding and discharging component is matched to realize flow guide control on wastewater entering the sedimentation tank, so that the two spaces in the sedimentation tank can receive new wastewater while precipitating the wastewater, the burden of a wastewater adjustment procedure is reduced, and the wastewater treatment efficiency is improved. When the flow guide assembly is adjusted, the switching assembly is synchronously adjusted, and meanwhile, the adjusting assembly is driven to clean the fine filtering assembly.

The application relates to the technical field of mineral spring mineralization equipment, in particular to a filter core device and a mineral spring mineralization equipment with the same. The filter core device comprises a device main body, the device main body has a shell, a first space and a second space are arranged in the shell in the axial direction, a mineralization cavity and a second buffer cavity are arranged in the second space, a mineralization filter core is arranged in the mineralization cavity; a first buffer cavity is arranged in the first space; the mineralization cavity and the second buffer cavity are arranged in the radial direction of the shell, or the second buffer cavity and the mineralization cavity are arranged in the radial direction of the shell; the first buffer cavity and the mineralization cavity are provided with a first pressure conduction structure which can be conducted under the action of water pressure; a second pressure conduction structure which can be conducted under the action of water pressure is arranged between the mineralization cavity and the second buffer cavity, the mineralization water concentration flowing out of the filter core can be effectively prevented from exceeding the standard, the user can be prevented from drinking the mineralization water exceeding the standard, and the safety and reliability are relatively good.

The invention provides a shield gate transistor and a preparation method thereof, a chip and electronic equipment, and relates to the technical field of semiconductors, and the shield gate transistor comprises a substrate and an epitaxial layer located at the first side of the substrate; a first conductive type body region; the first conductive type body region is formed in the epitaxial layer from one side, deviating from the substrate, of the epitaxial layer; a second conductive type heavily doped region and a trench gate structure; the second conductive type heavily doped region is formed in the first conductive type body region from one side, deviating from the substrate, of the first conductive type body region; the trench gate structure is at least formed in the first conductive type body region from one side, deviating from the substrate, of the first conductive type body region; wherein the doping concentration in the second conductive type heavily doped region and / or the junction depth of the PN junction in the second conductive type heavily doped region are / is changed in a gradient manner along the extension direction of the trench gate structure. According to the technical scheme, the starting risk of the parasitic triode is low, and the saturation current density of the device is reduced.