Abstract: EV-grade high-purity lithium sulfide and a preparation method therefor, including: A. mixing and well grinding a lithium source and a sulfur source to obtain a mixture; B. primary reaction: mixing the mixture with hydrazine hydrate in an inert atmosphere and reacting to obtain an intermediate slurry; C. secondary reaction: performing secondary reaction on the intermediate slurry in the inert atmosphere and drying to obtain a crude lithium sulfide product; and D. calcining and ball milling the crude lithium sulfide product to obtain the EV-grade high-purity lithium sulfide. The purity of the EV-grade high-purity lithium sulfide prepared by the method is above 99.9%, the whiteness thereof is above 80, and D50?15 ?m; the method is characterized by simple process operation, high safety, low energy consumption, low equipment requirements and low production cost; therefore, the method is suitable for industrial production.

Abstract: A method for implementing a magnetic confinement reaction is provided. An initial equilibrium configuration is constructed based on zero-dimensional parameters. The initial equilibrium configuration is subjected to iteration with a blanket, a divertor and a magnet to determine an equilibrium configuration of a reference equilibrium. A numerical simulation model of a plasma breakdown phase in a start-up process is established using a rigid conductor, and optimally solved to determine a maximum coil current. A phase after the breakdown is optimized into a quadratic programing problem to establish a performance function, which is solved using a preset constraint to determine a to-be-optimized parameter. The start-up process of the superconducting tokamak is completed according to the equilibrium configuration, the maximum coil current and the to-be-optimized parameter. A device and computer-readable storage medium for implementing magnetic confinement reaction are also provided.

Abstract: A leakage quick-detection device for drainage pipes comprises an operating rod assembly, a development module and a probe assembly. The development module comprises a receiving shell. A development board is fixedly connected into the receiving shell. A receiving and transmitting antenna is fixedly connected to the receiving shell and is electrically connected to the development board. The probe assembly comprises a composite platform. Four threaded through-holes are vertically and regularly formed in the composite platform. The change of water flow and water quality can be quickly reflected by ultrasonic data, conductivity data and flow data; compared with a traditional visual detection method, the detection dimensions are richer, the working time of personnel is shortened, more water flow information can be obtained, the labor intensity is reduced, and the troubleshooting accuracy is improved.

Abstract: A device for in-situ measurement of substance migration and transformation on a sediment-water interface includes a floating platform. Three take-up and pay-off components are fixedly connected to the edge of a top surface of the floating platform. Each take-up and pay-off component comprises an L-shaped base, a cable take-up and pay-off assembly, vertical rods, a guide sheave wheel, an adjustment assembly and a first cable. Two DGT samplers are fixedly connected to bottom ends of two three take-up and pay-off components. Water quality monitoring sensors are fixedly connected to the two first cables fixedly connected to the two DGT samplers, respectively. A sediment collector is fixedly connected to a bottom end of the other take-up and pay-off component. Sampling can be performed in-situ directly through DGT flat plates to avoid the impact of environmental changes.

Abstract: A device for stratified in-situ monitoring of the water quality and dissolved oxygen of sediments in a tidal river network region includes a floating platform. Three take-up and pay-off assemblies are fixedly connected to the edge of a top surface of the floating platform. The device can provide high-density data of stratified dissolved oxygen, all monitoring units perform sampling and monitoring directly at the positions where they are located, samples do not need to be transferred, sediments will not be disturbed, and monitoring is performed in the field environment, such that researchers can obtain the long-term diurnal change of stratified dissolved oxygen and the continuous change process of dissolved oxygen in one and even multiple hydrologic years, and basic data is provided for study of the dissolved oxygen change mechanism and accurate control of the water environment in tidal river network regions.

Abstract: A powder rotary fluidization device and a method thereof are provided. The powder rotary fluidization device includes a support device, the support device is provided with an installing plate, the installing plate is provided with a power device and a fluidization device, and the power device is in transmission connection with the fluidization device. After a position of the fluidization device on the installing plate is adjusted through the support device, the power device is started to drive the fluidization device to rotate, and meanwhile gases are introduced into the fluidization device to process powder. and therefore the problem of poor processing effect on fine powder with high viscosity is solved through the rotatable fluidization device.

Abstract: A powder rotary fluidization device and a method thereof are provided. The powder rotary fluidization device includes a support device, the support device is provided with an installing plate, the installing plate is provided with a power device and a fluidization device, and the power device is in transmission connection with the fluidization device. After a position of the fluidization device on the installing plate is adjusted through the support device, the power device is started to drive the fluidization device to rotate, and meanwhile gases are introduced into the fluidization device to process powder. and therefore the problem of poor processing effect on fine powder with high viscosity is solved through the rotatable fluidization device.

Abstract: A method for predicting a source rock by paleoenvironment restoration includes: (1) measuring a content of each mineral; (2) judging whether a sedimentary environment is a marine facies or a non-marine facies by utilizing element combination forms of Sr/Ba, B/Ga, Th/U, Fe/Mn and Sr/Ca; (3) judging a specific numerical value of a paleosalinity through a boron element and comparing the same with a current normal seawater value to deduce whether the current sedimentary environment is a saline water or non-saline water sedimentary environment; (4) judging an oxidation or reduction environment during sedimentation through element combination forms of (Cu+Mo)/Zn and V/(V+Ni); and (5) comprehensively analyzing the sedimentary environment, restoring a relationship between a palaeosedimentary environment and a source-reservoir configuration.