8results about How to "Meeting basic needs" patented technology

The invention discloses a low-cost high-cerium neodymium iron boron diffusion magnet and a preparation method and application thereof, and relates to the technical field of rare earth permanent magnet materials. Comprising the steps that a neodymium iron boron alloy casting piece Ce30 with the Ce content being 10 wt% and a neodymium iron boron alloy casting piece Ce50 with the Ce content being 15 wt% are prepared through burdening and smelting, after the Ce30 and Ce50 neodymium iron boron alloy casting pieces are evenly mixed, hydrogen decrepitation, jet milling, oriented pressing, cold isostatic pressing and vacuum sintering are sequentially carried out, and a high-cerium sintered neodymium iron boron matrix is obtained; carrying out grain boundary diffusion on the high-cerium sintered neodymium-iron-boron matrix to obtain a high-cerium neodymium-iron-boron diffused magnet; the performance of the blank prepared through the method is close to the N40 mark, the performance of the magnetic sheet after diffusion reaches the 38MT mark, the magnetic performance is kept at the high level, the Ce content is high, efficient utilization of the high-abundance element cerium is achieved, the production cost of the rare earth permanent magnet material is greatly reduced, industrial batch production can be achieved, and balanced utilization of rare earth resources is promoted.

This invention provides a biomimetic pet toy, comprising a shell, a drive unit, a circuit board, four legs, and a head. The drive unit and circuit board are installed inside the shell. The circuit board is connected to a horn, and the drive unit drives the legs and the tongue of the head via a linkage. The drive unit consists of a motor and a reduction gear set, which is divided into an overload clutch gear set, a limb gear set, and a head gear set. The motor drives the overload clutch gear set and the head gear set, enabling the legs to walk and the head and tongue to swing and extend / retract. The circuit board controls the motor's operation, the horn emits sound, and the battery box provides power. This toy has a simple structure, low cost, and can perform multiple actions, meeting the basic requirements of a biomimetic pet toy.

The invention relates to a perovskite thin film prepared by a low-pressure vacuum vapor phase, a solar cell and a method. The method comprises the following steps: S1, depositing an inorganic precursor on a charge transport layer of a substrate by using a physical vapor phase method; s2, gasifying the first ammonium halide salt under a low vacuum condition and diffusing the gasified first ammonium halide salt into the inorganic precursor to form a first perovskite thin film; and / or S3, gasifying the second ammonium halide salt under a low vacuum condition and diffusing the gasified second ammonium halide salt into the first perovskite thin film to form a second perovskite thin film; and / or S4, gasifying the third ammonium halide salt under a low vacuum condition and diffusing the gasified third ammonium halide salt into the second perovskite thin film to form a third perovskite thin film; wherein at least one of the step S2, the step S3 and the step S4 is selected. According to the method, continuous solid-gas reaction is carried out on the ammonium halide salt gasified step by step and the inorganic precursor, cross contamination of an organic source is reduced, the utilization rate of an organic material is increased, and the obtained perovskite thin film is uniform in component, high in product yield and good in repeatability.

This application provides a power semiconductor device, its fabrication method, and its application. The power semiconductor device includes a ceramic substrate, a cladding body, multiple chips, and multiple lead frames. The ceramic substrate includes a ceramic wafer, an inner metal foil, and an outer metal foil. The inner metal foil is disposed on one side of the ceramic wafer, and the outer metal foil is disposed on the opposite side of the ceramic wafer. The cladding body covers the ceramic substrate, exposing the side of the outer metal foil away from the inner metal foil to the external space. The chips are located within the cladding body and disposed on the inner metal foil. The multiple chips are spaced apart from each other. The side of a single chip not in contact with the inner metal foil is electrically connected to the inner metal foil through a lead frame. This application replaces the lead bonding in traditional power semiconductor devices with lead frames, which not only improves the heat dissipation performance of the chips but also reduces thermal resistance, achieving miniaturization and weight reduction of the device, thereby improving the reliability of the power semiconductor device.

The invention belongs to the field of safety engineering in chemical industry production, and discloses a chemical process control system network risk analysis method based on multilayer business process modeling and application, and the method comprises the steps: analyzing the business process and data interaction relation of a chemical process, and constructing a multilayer business process model based on a BPMN2.0 standard; according to the method, an original equipment-centered method is replaced, an improved failure mode and consequence analysis centered on a business basic unit is provided, a potential failure mode of a task is identified, failure reasons and consequences under different attack intentions are clarified, and generation of an attack fault tree model is guided conveniently; and finally, risk analysis of the business activity is carried out. According to the method, the effect and importance of the assets in the task execution process are considered, the whole complete failure path under the integration of information security and function security can be comprehensively covered, the security risk in each task link can be more comprehensively identified, and then the accuracy of risk analysis is improved.

The invention relates to the technical field of visual information processing, in particular to a multipurpose visual communication design system which comprises a graphic design module, a graphic typesetting module, a color management module, an animation and interactive design module, a material management module and an output and preview module. The graphic design module provides abundant tools and functions, and various unique graphic elements can be created through vector graphic drawing, bitmap processing or graphic resource management; the graphic typesetting module is used for reasonably arranging various graphic elements so as to achieve an optimal visual communication effect; a design system developer can optimize an operation interface through a graphic typesetting module, adopts a simple and intuitive design style, and places common tools and functions at conspicuous positions, so that a designer can quickly find and use the common tools and functions conveniently, a green designer is helped to quickly master, and the design efficiency is improved. And a designer can easily learn and master the use method of the design system.

The present invention is a pretreatment device for an online analyzer of a chemical process, comprising a controller, a container for a liquid to be tested, a circulation pump, a filter, a liquid inlet pressure sensor and a liquid outlet pressure sensor, wherein the liquid inlet pressure sensor is installed on the top of the filter, the liquid outlet pressure sensor is installed at the liquid outlet of the filter, the container for the liquid to be tested is connected with a main circulation pipeline, the circulation pump is installed on the main circulation pipeline, a liquid output pipeline is also connected to the main circulation pipeline, a liquid input pipeline is connected to the liquid output pipeline, the liquid input pipeline is connected to the liquid inlet of the filter, the filter is also connected to the container for the liquid to be tested through a return liquid pipeline, a sampling pipeline is connected to the return liquid pipeline, a first ball valve and a second ball valve are installed on the liquid output pipeline, a third ball valve is installed on the liquid input pipeline, and the liquid inlet pressure sensor and the liquid outlet pressure sensor are both connected to the controller in communication. Beneficial effects: improving detection accuracy, extending the life of the analyzer and the maintenance cycle.

The present invention provides a shielding film with a multi-layer metal structure, including an insulating layer and a multi-layer metal compounded on the insulating layer; the thickness of each metal layer is 0.05 to 5 μm; the number of the multi-layer metal layers is 2 to 10; and a conductive adhesive layer is provided between the multi-layer metal layers. The present invention provides a multi-layer metal to control the thickness of each metal layer, and the metal layers are bonded by the conductive adhesive layer, so that the shielding film has good flexibility and excellent shielding effect. In addition, the use of the conductive adhesive layer makes the bonding force between the metal layers better, and while ensuring the high-frequency signal shielding performance greater than 80db@10ghz, the shielding film has good flexibility, which meets the flexibility requirements of the flexible circuit board, and at the same time has good high temperature resistance, and can still keep the bonding force of the metal layer from decreasing and stable and reliable when subjected to high temperature impact.