Abstract: Systems and methods for analyzing a diffusion trend of a diffusible substance. The systems may obtain a plurality of sets of reference information relating to the diffusible substance from a plurality of devices respectively, each of the plurality of sets of reference information at least including a time point when a corresponding device detects the diffusible substance and a location where the device detects the diffusible substance. The plurality of sets of reference information may correspond to a same or a substantially same time domain. The systems may determine the diffusion trend of the diffusible substance based on the plurality of sets reference information.

Abstract: An optical module that includes an optical transceiver component and a fiber adapter. The optical transceiver component includes a first tubular shell, a light splitting assembly in the first tubular shell, first and second light emission assemblies and first and second light reception assemblies connected to the first tubular shell, and a bracket inserted onto the first tubular shell. The first tubular shell is provided therein with an optical element and an inclined plane located below the optical element. The inclined plane is configured to reflect a reflected beam from a transmission surface of the optical element. The light splitting assembly includes a support frame and three optical splitters. The first light reception assembly is inclinedly disposed relative to a central axis of the first tubular shell via a bracket, while the second light reception assembly is perpendicularly assembled on the first tubular shell.

Abstract: A memory swapping method and apparatus are provided. The method includes: selecting n to-be-swapped-out pages; compressing the n to-be-swapped-out pages into n compressed blocks, and buffering the n compressed blocks in a compressed data buffer area; organizing at least one of the n compressed blocks into m to-be-written units; and writing the m to-be-written units into a swap area of a non-volatile storage device in a maximum of m batches, where at least one of the m to-be-written units is stored in a segment of continuous space in the swap area. The method reduces a quantity of write times during memory swapping, thereby prolonging a service life of the non-volatile storage device.

Abstract: A circuit for driving a light-emitting diode (LED) load and a direct current to direct current (DC-DC) converter includes a first sampling sub-circuit, a driving circuit. The first sampling sub-circuit is configured to generate a current signal representing a load current of the LED load. The driving circuit is configured to receive a brightness adjustment signal and a frequency adjustment signal; generate a first control signal, based on the current signal and the brightness adjustment signal, for controlling an output current of the DC-DC converter; and generate a second control signal, based on the frequency adjustment signal, for controlling a switching frequency of the LED load.

Abstract: A method may include obtaining parameter information of a plurality of acquisition devices that communicate with the system to transmit video data to the system. The parameter information of each of the plurality of acquisition device may include transmission information of a target key frame of the video data of the acquisition device. The method may also include determining, based on the parameter information, whether there are collision key frames in the target key frames of the plurality of acquisition devices. The method may also include adjusting an original generation time of at least one of the collision key frames in response to determining that there are collision key frames, so that after the adjustment, there is no collision key frame in the target key frames of the plurality of acquisition devices.

Abstract: The present disclosure provides a fully enclosed cell culture system, including at least an incubator, a bioreactor, a gas flow assembly, a liquid flow assembly, a temperature adjustment assembly, and a central controller. The system realizes a thermostatic incubation environment. Cells are incubated by perfusion, and a fully enclosed integrated process from cell activation, infection and amplification to finished product harvesting is achieved. By axially stirring the cells and an incubation liquid in a tank body, a radial shear force is reduced, which effectively protects the cells and improves the cell yield. In the system of the present disclosure, gases are separately introduced, ensuring that the content of each gas component is stable in the incubation process. The cell incubation is not directly affected by changes of outside gases in the cell incubation process, which improves culture efficiency.

Abstract: The present disclosure may provide a system for positioning a target scene and/or navigating a detection equipment to the target scene. The system may obtain at least one image captured by at least one camera. The at least one image may include the target scene. The system may also determine a position of the target scene based on the at least one image. Further, the system may plan a travelling route for a detection equipment to the target scene based on the position of the target scene.

Abstract: Systems and methods for analyzing a diffusion trend of a diffusible substance. The systems may obtain a plurality of sets of reference information relating to the diffusible substance from a plurality of devices respectively, each of the plurality of sets of reference information at least including a time point when a corresponding device detects the diffusible substance and a location where the device detects the diffusible substance. The plurality of sets of reference information may correspond to a same or a substantially same time domain. The systems may determine the diffusion trend of the diffusible substance based on the plurality of sets reference information.

Abstract: The present disclosure is related to systems and methods for disaster control. The method includes obtaining an alert message including information associated with a disaster in a target area. The method includes sending a first shooting instruction to at least one camera device to capture first image data associated with the target area. The method includes obtaining a plan for controlling the disaster from at least one processor. The first image data may be transmitted to the at least one processor through a communication network. The plan may be determined based on the information associated with the disaster and the first image data.

Abstract: A circuit for driving a light-emitting diode (LED) load and a direct current to direct current (DC-DC) converter includes a first sampling sub-circuit, a driving circuit. The first sampling sub-circuit is configured to generate a current signal representing a load current of the LED load. The driving circuit is configured to receive a brightness adjustment signal and a frequency adjustment signal; generate a first control signal, based on the current signal and the brightness adjustment signal, for controlling an output current of the DC-DC converter; and generate a second control signal, based on the frequency adjustment signal, for controlling a switching frequency of the LED load.