Abstract: A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed.

Abstract: The present disclosure relates to an additive used in a methionine preparation process, and a methionine preparation method. The additive provided by the present disclosure is a mixture containing components A, B, and C; component A has a structure represented by the following general formula (1); component B has a structure represented by the following general formula (2); component C is silicone oil; RCON(CH3)CH2CH2SO3Na (1). The methionine preparation method provided in the present invention comprises subjecting methionine to crystallization and/or recrystallization in the presence of the additive provided by the present disclosure. The additive provided by the present disclosure results in uniform emulsification, has good stability, can be used stably for a long time, and is suitable for a continuous crystallization process. The prepared methionine crystal has a good crystal form, a large bulk density, and good flowability.

Abstract: The present invention relates to a milling machine processing system with an intelligently follow-up cutting fluid nozzle and a working method. The milling machine processing system comprises a workpiece stage, wherein a milling machine box body is arranged above the workpiece stage; a milling cutter mechanism is mounted on the milling machine box body for processing workpieces on the workpiece stage; a rotating mechanism is mounted on an end surface of the milling machine box body located at one side of a milling cutter; the rotating mechanism is connected with a two-axis linkage mechanism and drives the two-axis linkage mechanism to rotate about a center line on which the milling cutter is located; the two-axis linkage system is connected with a nozzle through an angle adjusting mechanism and is used for adjusting a position and an angle of the nozzle.

Abstract: Disclosed in embodiments of the present disclosure is a wireless charging device, by setting a excitation source configured to input current of different frequencies to a transmitting circuit, implementing charge for electronic devices at different working frequencies wirelessly only through a set of transmitting circuit, there is no need of multiple sets of switchable transmitting circuit, so as to simplify the circuit structure and device structure, and reduce the manufacturing cost and improve the using convenience.

Abstract: Disclosed in embodiments of the present disclosure are a wireless power transmitting apparatus and a wireless charging system. The wireless power transmitting apparatus comprises a wireless power transmitting coil, first magnet units and a second magnet unit. The first magnet units arranged at intervals around the wireless power transmitting coil, and the second magnet unit arranged in the center of the wireless power transmitting coil. The wireless charging system comprises the wireless power transmitting apparatus and a wireless power receiving apparatus, which comprises a wireless power receiving coil and magnet units arranged around or at the center of the wireless power receiving coil. Therefore, the technical scheme of the embodiments of the present disclosure can magnetically attract a variety of wireless power equipment for wireless charging, and can provide good adaptability and strong usability.

Abstract: Disclosed in an embodiment of the present disclosure is a wireless power transmission apparatus, including a coil, accommodation bodies, and magnet units, wherein the accommodation bodies are arranged at intervals around the coil; and the magnet unit is disposed in the accommodation body in a movable manner. Owing to a constrained activity of the magnet unit, the wireless power transmission apparatus in the technical solution of the embodiment of the present disclosure can adapt to a plurality of wireless power receiving or transmitting apparatuses, thereby having good practicability, and improving the use experience of a user and the charging efficiency.

Abstract: The present disclosure provides a display device, including a housing, an air tunnel, and a functional device. The housing includes an air inlet and an air outlet, wherein the air inlet and the air outlet are disposed on two sides of the housing opposite to each other. The air tunnel is disposed in the housing and extends from the air inlet to the air outlet; and the functional device is disposed in the housing and located outside the air tunnel.

Abstract: A wireless charging management system and a wireless power transmitting terminal are disclosed. By managing a plurality of wireless power transmitting terminals distributed at different geographic positions through a server, the user can obtain position information and state information of the wireless power transmitting terminal through the client terminal, and at the meanwhile, the wireless power transmitting terminal can operate in response to the control of the server, which enables the user to use the wireless charging device in a shared manner conveniently.

Abstract: A wireless charging management system and a wireless power transmitting terminal are disclosed. By managing a plurality of wireless power transmitting terminals distributed at different geographic positions through a server, the user can obtain position information and state information of the wireless power transmitting terminal through the client terminal, and at the meanwhile, the wireless power transmitting terminal can operate in response to the control of the server, which enables the user to use the wireless charging device in a shared manner conveniently.

Abstract: Disclosed is a flow battery pack with a monitoring system. The flow battery pack with a monitoring system comprises a battery pack device and a monitoring device. The battery pack device comprises a pole plate, and the pole plate is provided thereon with a measuring port. The monitoring device comprises a measuring probe, and the measuring probe extends to the interior of the battery pack device and is arranged corresponding to the measuring port on the pole plate. The monitoring device is used for monitoring the flow pressure and temperature at the measuring port. According to the technical solution of the present disclosure, a monitoring device is introduced into the interior of a flow battery pack, and the real values of correlative parameters of the interior of the battery pack and the distribution status thereof can be obtained through the monitoring device.

Abstract: The disclosure discloses a porous electrode assembly, a flow half-cell and a flow cell stack. The porous electrode assembly includes multiple porous electrodes which are stacked, wherein at least two porous electrodes are flow passage electrodes with flow passage, and a part of flow passages of at least two flow passage electrodes are mutually communicated to form a flow field. The flow field used for circulating an electrolyte and formed by communicating the flow passages one another is arranged in at least one porous electrode of the porous electrode assembly, and the electrolyte flows in the porous electrodes under a flow guide effect of the flow field, so that surface areas, permeated by the electrolyte, of solid parts of the porous electrodes are enlarged, flow resistance of the porous electrodes to the flowing of the electrolyte is reduced, and a flow pressure difference is reduced.

Abstract: Disclosed is a flow battery pack with a monitoring system. The flow battery pack with a monitoring system comprises a battery pack device and a monitoring device. The battery pack device comprises a pole plate, and the pole plate is provided thereon with a measuring port. The monitoring device comprises a measuring probe, and the measuring probe extends to the interior of the battery pack device and is arranged corresponding to the measuring port on the pole plate. The monitoring device is used for monitoring the flow pressure and temperature at the measuring port. According to the technical solution of the present disclosure, a monitoring device is introduced into the interior of a flow battery pack, and the real values of correlative parameters of the interior of the battery pack and the distribution status thereof can be obtained through the monitoring device.

Abstract: The disclosure discloses a redox flow battery stack and a redox flow battery system having the same, wherein the redox flow battery stack includes: flow frames, flow plates arranged inside the flow frame, ion exchange membranes arranged between the flow plates and forming a cavity for accommodating electrolyte with the flow plate, and electrodes arranged inside the cavity, wherein two groups of flow ports are provided on the sides of the flow frame, each group of flow ports includes: a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet in each group of flow ports are provided in the manner of one-to-one correspondence and are interconnected with a corresponding cavity; the redox flow battery stack further includes: electrolyte pipelines, the liquid inlet and the liquid outlet in each group of flow ports respectively have a corresponding electrolyte pipeline and interconnect with the corresponding electrolyte pipeline.

Abstract: Provided is a flow battery system and a control method and device thereof. The control method of the flow battery system includes: monitoring the temperature of the flow battery system; judging whether the temperature of the flow battery system exceeds a predefined temperature value range or not; and if the temperature of the flow battery system exceeds the predefined temperature value range, adjusting the temperature of the flow battery system to make same fall into the predefined temperature value range. The present disclosure enables the flow battery system to operate within the predefined temperature value range, thus enhancing the charging and discharging efficiency of the flow battery system.

Abstract: The disclosure discloses a liquid flow battery system and a repairing device thereof. The repairing device, used for cleaning a battery stack of the liquid flow battery system, comprises an acid liquid storage tank (11), configured to store an acid solution; a first acid liquid pipe (12) connected with a first end of the acid liquid storage tank (11), configured to be connected with a first end of the battery stack; a second acid liquid pipe (13) connected with a second end of the acid liquid storage tank (11), configured to be connected with a second end of the battery stack; and a power device (14) arranged in the first acid liquid pipe (12) or the second acid liquid pipe (13) and configured to drive the acid solution in the acid liquid storage tank (11) to flow circularly in the first acid liquid pipe (12) and the second acid liquid pipe (13).