202results about How to "Improve universal applicability" patented technology

A technique that randomizes a sample window over which one or more interleave mismatch corrections are made to a time interleaved analog to digital converter (TIADC).

The invention discloses a rapid preparation method of a C/C composite material and belongs to the technical field of material preparation. The rapid preparation method of the C/C composite material comprises the following steps: 1) preparation of a preform; 2) heat treatment of the preform; 3) preparation of water-based graphite slurry; 4) injection of graphite slurry; 5) recharging of the graphite slurry; 6) preparation of a green body; 7) carbonization treatment; and 8) densification treatment: the C/C porous preform is densified by using one or a combination of more of a chemical gas phasepermeation process, an impregnation-carbonization process and a high temperature hot pressing process. The rapid preparation method of the C/C composite material, disclosed by the invention, has the advantages that graphite powder is uniformly introduced by using a slurry injection method without destroying the bonding strength of the carbon fiber preform; the strength and microstructure uniformity of the material green body is guaranteed on the one hand, the densification time in the later period is greatly shortened on the other hand, the cost is reduced, and the rapid preparation method issuitable for industrial production; by using the water-based graphite slurry, the cost is low and pollution is avoided; and the C/C composite material prepared by using the method has the advantages of high strength, good wear resistance and reliable high temperature performance.

The invention discloses a tank truck lateral overturning early warning system based on a GIS. The system comprises a mobile GIS module, a vehicle information module, a lateral overturning state judgment module, an early warning module and an active speed control module. In the system, the mobile GIS module obtains vehicle position information and obtains information of a bend and a road in the heading direction through a geographic information system; the vehicle information module stores vehicle parameter information and obtains in-tank liquid information in real time; the lateral overturningstate judgment module combines the information of the two above modules to establish a calculation model of the lateral overturning critical speed of a tank truck when the tank truck travels on the bend, compares the current traveling speed of the vehicle with the minimum lateral overturning critical speed and judges whether the vehicle can be overturned or not according to a comparison result; the early warning module warns a driver to control the vehicle speed in the modes of voice and the like when the vehicle is in lateral overturning danger; and the active speed control module reduces the vehicle speed through control of an engine throttle valve and a brake device under an emergency. The system guarantees the safety of the driver and the vehicle.

The invention discloses a chip observation sample manufacture method and a system. The chip observation sample manufacture method and the system are used for forming a chip observation sample without using a reactive ion etching (RIE) device, and are capable of reducing realization complexity, improving efficiency, reducing cost and improving general applicability in manufacturing the chip observation sample. The chip observation sample manufacture method comprises the following steps. A to-be-observed chip is fixed on the surface of an object, a passivation layer of the to-be-observed chip is ground through a grinding and polishing machine by utilizing sand paper with first granularity or grinding liquid, and grinding is performed by utilizing sand paper with second granularity which is smaller than the first granularity till a to-be-observed layer occurs. The grinding and polishing machine polishes the surface of the to-be-observed layer, and the chip observation sample is formed.

The invention provides a Lowtran7 atmosphere software-based method for calculating an action distance of a ground-air detection infrared imaging system. Firstly a ground-air detection target and background radiation are analyzed, and the action distance of the infrared system is modeled from the perspective of contrast; secondly Lowtran7 atmosphere software is called to generate a database of atmospheric radiant brightness, atmospheric transmissivity, wavelengths, path distances and zenith observation angles under different atmospheric conditions; discrete data is integrated by utilizing a spectral segmentation method; the action distances under the corresponding path distances are calculated; and the maximum path distance which enables the path distance to be equal to the calculated distance is calculated out to serve as the final action distance of the infrared system.

The invention provides a combined filling system for measured wind speed loss values of multiple neighboring wind motors in a wind field. The combined filling system comprises a wind speed data similarity determination unit, a model parameter identification unit, a wavelet neural network submodel filling unit and a combined filling unit. The combined filling system for the measured wind speed loss values of multiple neighboring wind motors in the wind field is used for overcoming the technical defects of an existing method in filling of lost measured wind speed values when the measured wind speeds of multiple neighboring wind motors in the wind field have loss values simultaneously; the similarity of the wind speed data is analyzed by use of three methods, namely a dynamic time alignment method, a correlation coefficient method and a spatial neighbor method, in a two-dimensional time domain; the measurement wind speeds of a plurality of wind motors most similar to the wind motor having the lost measured wind speed in wind speed evolution near a loss sampling point are extracted, and a wavelet neural network is established for each measured wind speed to perform lost wind speed filling; the system is adaptive to the wind speed data of different wind field by use of adjustable parameters; a combined filling method based on entropy weight is adopted, and finally, a filling system for the measured wind speed loss values of multiple neighboring wind motors in the wind field is put forward.

A fruit and vegetable picking device comprises a first cover body, a coil, a magnetofluid ball and a second cover body. One end of the first cover body is an opening end, and a spherical groove is arranged at the opening end. The coil is spherically distributed in a ring, at least a part of the coil is contained in the spherical groove, and the coil is electrically connected with an external power source. The magnetofluid ball comprises a flexible ball casing and magnetorheological fluid contained inside the flexible ball casing, and a part of the magnetofluid ball is contained in the coil. The second cover body is in a shape of a circular truncated cylinder, the second cover body comprises a big opening end and a small opening end, the second cover body is covered on the magnetofluid ball, the big opening end is fixedly connected with the opening end of the first cover body, one end of the magnetofluid ball protrudes out of the small opening end to form a holding portion which is used for wrapping fruits and vegetables. After the magnetorheological fluid changes into solid, surfaces of the fruits and vegetables are completely contacted with the holding portion, the holding portion can stably hold the fruits and vegetables, dropping of the fruits and vegetables from the inside of the holding portion is prevented, and damage can be avoided.

The invention discloses a method used for preparing a plurality of metal organic frameworks using a hydrosolvent system. The method comprises following steps: 1, trimesic acid is dissolved in water, wherein 0.2143 to 0.8571g of trimesic acid is added into 20 to 100ml of deionized water, an obtained mixture is subjected to oil bath heating and stirring until trimesic acid is completely dissolved inwater; 2, the metal organic frameworks are prepared, wherein 0.2441 to 1.7544g of a metal salt is dissolved in 20 to 100ml of deionized water, a trimesic acid aqueous solution obtained in the step 1is added, an obtained mixed material is subjected to oil bath heating stirring, an obtained product is collected, is subjected to washing and centrifugation with ethanol and deionized water alternatively, and is dried in a drying oven so as to obtain the metal organic frameworks. Operation of the method is simple; the chemical bath experimental process is convenient for controlling and observation; large scale product is convenient to realize; the metal organic frameworks can be taken as precursors in preparation of metal oxides, porous carbon, and mixtures of metal oxides and porous carbon; and application prospect in the fields such as energy storage, sensing, catalysis, and gas adsorption is promising.

The invention provides a joint training method and device for a machine learning model, an electronic device and a computer readable storage medium, and belongs to the technical field of computers. The method comprises the following steps: a data node acquiring sample data for training; the data node processing the sample data through the first part of the target model to obtain intermediate data,and sending the intermediate data to the label node; the label node processing the intermediate data through a second part of the target model and obtaining error data based on label data corresponding to the sample data; the label node sending the error data to the data node; the data node adjusting the parameters of the first part according to the error data, and/or the label node adjusting theparameters of the second part according to the error data; wherein the target model is composed of a first part and a second part. According to the invention, the data between the data node and the label node is opaque in the joint training process, and the privacy and security of the data are improved.

The invention belongs to the technical field of drilling, and particularly relates to a directional drilling executing mechanism based on a three-speed drill bit. The directional drilling executing mechanism comprises a drill bit drill string, a drill bit, a pressure exerting support plate, pressure exertion electromagnetic telescopic rods, a connecting structure, a positioning mechanism, a motor, an electromagnetic telescopic rod support plate, rotating pairs and a universal joint, wherein the drill bit is connected with the motor through the drill bit drill string, the connecting structure, the universal joint and a motor rotating shaft; through the design of the universal joint, the drill bit drill string can still be driven to rotate by the motor after forming a certain angle relative to the motor rotating shaft; the drill bit drill string is arranged on the pressure exerting support plate; and the three rotating pairs are added to the installation of the two pressure exertion electromagnetic telescopic rods on the pressure exerting support plate and the pressure exerting telescopic rod support plate. By adopting such a design, when the drill bit is enabled to do forward drilling, the drill bit is allowed to form a certain angle relative to the motor. The angle of the drill bit drill string and the motor rotating shaft can be controlled for directional drilling, and high practicability is realized.