Abstract: Provided are systems and methods for synthesis of metastable intermolecular composites, specifically energetic nanocomposites. The method may include dispersing a reductive fuel within a first aqueous solution and combining the reductive fuel solution with a second aqueous solution comprising a metal oxide and base to create a reductive fuel-metal oxide/base solution. The reductive fuel-metal oxide/base solution is mixed and solid material is filtered and collected from the mixture. The solid material is heated to obtain reductive fuel-metal oxide energetic nanocomposites. The ratio of base to metal oxide can be varied to achieve different structures of including core-shell or well-mixed nanocomposites. The reductive fuel may be aluminum nanoparticles, the metal oxide may be copper oxide, and the base may be ammonia.

Abstract: A method, apparatus, device and storage medium for multimedia content shooting is provided. The method comprises displaying a first shooting page comprising a first shooting window for displaying a first preview of a first scene captured by a first camera of a terminal device. The method further comprises in response to the first camera completing shooting of a first multimedia content item, displaying, in the graphical user interface, a second shooting page comprising a second shooting window and a first content window, the second shooting window displaying a second preview of a second scene captured by a second camera, the first content window displaying the first multimedia content item. The method further comprises in response to at least one predetermined condition being satisfied, shooting a second multimedia content item by the second camera; and generating a third multimedia content item based on the first and second multimedia content items.

Abstract: According to embodiments of the present disclosure, there is provided a method, apparatus, device and storage medium for content presentation. The method comprises based on a first user input received in a graphical user interface, the first user input indicating to present a first content associated with a second user to a first user in the graphical user interface, determining whether the first user has provided the second content. The method further comprises in accordance with a determination that the first user does not provide the second content, presenting a blurred image associated with the first content to the first user in the graphical user interface. In this way, a more flexible content sharing application or content presentation application can be provided.

Abstract: Provided are system and methods for additive manufacturing, especially using regolith. A system comprises a vacuum chamber configured to contain a material, wherein the material includes a metal fuel and an oxidizer, and an ignition source configured to ignite the material to combustion. The metal fuel includes at least one of magnesium and aluminum. The oxidizer is at least one of lunar regolith, Martian regolith, or a regolith simulant. The systems and methods provide a mechanism for sustainable production of fuels from regolith materials, with limited or not resource requirements from Earth, resulting in more sustainable space exploration.

Abstract: In one embodiment, a method may include determining one or more of (1) an amount of use of a display screen of a user's client computing device during a period of time, or (2) a frequency of unlocks of the display screen during the period of time. The method may include displaying, on a lock screen of the client computing device, one or more of: (1) the amount of use of the display screen during the period of time, or (2) the frequency of unlocks of the display screen during the period of time.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises presenting a first shooting page in an asynchronous shooting mode. The first shooting page includes a first shooting window for presenting a first scene captured by a first camera of a terminal device. The method further comprises in response to the first camera completing shooting of a first image, presenting a second shooting page comprising a second shooting window and a first image window. The second shooting window presents a second scene captured by a second camera different from the first camera. The first image window presents the first image. The method further comprises capturing a second image by the second camera while the second shooting page being presented. In this way, flexible and interesting image shooting experience is provided.

Abstract: Embodiments of the disclosure provide a method, apparatus, device and storage medium for multimedia content shooting. The method includes: initiating a first camera and a second camera different from the first camera; presenting in a first shooting window a first preview of a scene outputted by the first camera and in a second shooting window a second preview of the scene outputted by the second camera concurrently; receiving a camera switching command; presenting in the first shooting window the second preview and in the second shooting window the first preview concurrently; generating a composite multimedia content item by processing a first multimedia content item and a second multimedia content item, wherein the first multimedia content item includes first representations of the scene captured by the first camera, and wherein the second multimedia content item includes second representations of the scene captured by the second camera.

Abstract: A method, apparatus, device and storage medium for multimedia content shooting is provided. The method comprises displaying a first shooting page comprising a first shooting window for displaying a first preview of a first scene captured by a first camera of a terminal device. The method further comprises in response to the first camera completing shooting of a first multimedia content item, displaying, in the graphical user interface, a second shooting page comprising a second shooting window and a first content window, the second shooting window displaying a second preview of a second scene captured by a second camera, the first content window displaying the first multimedia content item. The method further comprises in response to at least one predetermined condition being satisfied, shooting a second multimedia content item by the second camera; and generating a third multimedia content item based on the first and second multimedia content items.

Abstract: This disclosure relates to a video processing method and apparatus, and a non-transitory computer-readable storage medium, and relates to the field of computer technologies. The processing method includes: presenting an avatar of at least one user; under the condition that a first user exists in the at least one user, playing a dynamic image within an area where an avatar of the first user is located, wherein the first user is a user who has posted a video content within a preset duration, and the dynamic image is a related image of the video content; and presenting the video content posted by the first user in response to an operation of a second user on the dynamic image.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.

Abstract: A method of synthesis of energetic particles, and associated systems, the method including providing a metal powder, dispersing the metal powder in a first fluid to form a first suspension, contacting the first suspension with an oxide precursor, aqueous ammonium hydroxide and a second fluid, to produce a first product, collecting product solids and inductively heating product solids to produce energetic core-shell particles.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.

Abstract: This disclosure relates to a video processing method and apparatus, and a non-transitory computer-readable storage medium, and relates to the field of computer technologies. The processing method includes: presenting an avatar of at least one user; under the condition that a first user exists in the at least one user, playing a dynamic image within an area where an avatar of the first user is located, wherein the first user is a user who has posted a video content within a preset duration, and the dynamic image is a related image of the video content; and presenting the video content posted by the first user in response to an operation of a second user on the dynamic image.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises presenting a first shooting page in an asynchronous shooting mode. The first shooting page includes a first shooting window for presenting a first scene captured by a first camera of a terminal device. The method further comprises in response to the first camera completing shooting of a first image, presenting a second shooting page comprising a second shooting window and a first image window. The second shooting window presents a second scene captured by a second camera different from the first camera. The first image window presents the first image. The method further comprises capturing a second image by the second camera while the second shooting page being presented. In this way, flexible and interesting image shooting experience is provided.

Abstract: In one embodiment, a method may include determining one or more of (1) an amount of use of a display screen of a user's client computing device during a period of time, or (2) a frequency of unlocks of the display screen during the period of time. The method may include displaying, on a lock screen of the client computing device, one or more of: (1) the amount of use of the display screen during the period of time, or (2) the frequency of unlocks of the display screen during the period of time.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.