Abstract: A stirring device includes a tank, a first stirring mechanism, a second stirring mechanism, and a flow blocking mechanism located in the tank and arranged on a side wall of the tank. A first stirring shaft of the first stirring mechanism is located in a middle part of the tank, and one end of the first stirring shaft is provided with a radial-flow stirring paddle located in the tank. A second stirring shaft of the second stirring mechanism is located on one side of the first stirring shaft. The second stirring shaft and the first stirring shaft are arranged in a radial direction of the tank. One end of the second stirring shaft is provided with an axial-flow stirring paddle located in the tank. The flow blocking mechanism is configured to block movement of materials in the tank.

Abstract: A sprayer includes a sprayer body. The sprayer body is provided with a liquid material inlet, a liquid material nozzle, a gas inlet, a gas nozzle, a liquid material channel, and a gas channel. The liquid material nozzle and the liquid material inlet both communicate with the liquid material channel, the gas nozzle and the gas inlet both communicate with the gas channel, and the gas nozzle is provided at the liquid material nozzle. A dispersing member is provided in the liquid material channel and disposed at the liquid material nozzle. The dispersing member divides the liquid material channel into multiple sub-channels communicating with the liquid material nozzle.

Abstract: Methods and systems for protecting membership privacy for secure computation and communication are provided. The method includes providing a first dataset, determining a number N based on a data privacy configuration, and generating a padding dataset having more than N elements. An intersection of the padding dataset and the first dataset is empty. The method also includes shuffling the padding dataset, up-sampling the first dataset with a first N elements of the shuffled padding dataset, and performing an intersection operation based on the up-sampled first dataset and a received dataset.

Abstract: Methods and systems for secure computation and communication are provided. The method includes transforming identifications of a first dataset using a first transforming scheme, and transforming attributes of the first dataset using a second transforming scheme. The method also includes dispatching the transformed first dataset, receiving a second dataset, transforming identifications of the received second dataset, dispatching the identifications of the transformed received second dataset, and receiving a set of identifications. The method further includes generating a first intersection of the received set of identifications and the transformed received second dataset, generating a first share based on the first intersection, receiving a second share, and constructing a result based on the first share and the second share.

Abstract: A pulverizer includes a support frame, a stator, and a rotor. The stator is connected to the support frame and has a stator pulverizing surface. The rotor is connected to the support frame and has a rotor pulverizing surface, and the rotor is rotatable. The stator pulverizing surface is opposite to the rotor pulverizing surface, a pulverizing chamber is formed between the stator pulverizing surface and the rotor pulverizing surface, and a distance between the stator pulverizing surface and the rotor pulverizing surface is adjustable.

Abstract: Embodiments of the present application provide a crushing and drying device, including: a classification unit, a first box body, and a second box body connected in sequence along the direction of gravity, the first box body being configured to accommodate and crush materials, the second box body being configured to convey airflow to the first box body to dry the materials, and the classification unit being configured to screen out and discharge crushed and dried target materials, the target materials being materials with particle sizes less than a preset threshold.

Abstract: A drying system includes a drying chamber, a collecting apparatus, and an air feed apparatus. The drying chamber is configured to accommodate a material to be dried. The collecting apparatus is connected to a material outlet of the drying chamber. The air feed apparatus is connected to an air inlet of the drying chamber and is configured to feed air to the drying chamber. The air feed apparatus includes a first condensing mechanism, a first heating mechanism, and a first water content sensor, where along an air feed direction of the air feed apparatus, the first condensing mechanism is located upstream of the first heating mechanism; the first condensing mechanism is configured to reduce water content of gas entering the drying chamber; and the first heating mechanism is configured to heat the gas entering the drying chamber.

Abstract: The present application relates to a drying apparatus and a system for preparing batteries. The drying apparatus includes a drying tower and a cooling mechanism. The cooling mechanism is disposed on the drying tower, and the cooling mechanism is used for cooling the inner wall of the drying tower, so that the temperature of the inner wall of the drying tower is controlled within the required temperature range. In this way, when the drying tower performs spray drying operation, after the material is in contact with the inner wall of the drying tower, the phenomenon that the material melts because of a high temperature of the inner wall and adheres to the inner wall is avoided. This reduces the probability of the material hanging on the wall, thereby improves the production rate and granulation quality of the material.