Abstract: The present disclosure discloses a method for reproducing an object in a 3D scene and a virtual reality head-mounted device. The method comprises: simultaneously gathering at least two channels of video stream data in real time at different angles for an object to be displayed by using at least two image gatherers, wherein first field angles of the image gatherers at least partially overlap in space, and the first field angles are a horizontal field angle, a vertical field angle or a diagonal field angle; identifying out a shape of the object varying in real time from the at least two channels of video stream data; according to the shape of the object varying in real time, obtaining a corresponding object motion trajectory; and processing the shape of the object varying in real time and the corresponding object motion trajectory into a 3D image and in real time superposition-displaying the 3D image into the 3D scene.

Abstract: The present disclosure discloses a system and a method for reproducing an object in a 3D scene. The system comprises an object acquiring unit configured to simultaneously acquire at least two channels of video stream data in real time at different angles for an object to be displayed; an object recognizing unit configured to recognize a shape of the object varying in real time from the at least two channels of video stream data; an object tracking unit configured to obtain corresponding object motion trajectory according to the shape of the object varying in real time; and an object projecting unit configured to process the shape of the object varying in real time and the corresponding object motion trajectory into a 3D image and superposition-project the 3D image into the 3D scene in real time. The technical solutions of the present disclosure can reproduce the object in the 3D scene, and achieve the purpose of displaying the real object in the 3D scene.

Abstract: This invention discloses a method and device for controlling a touch screen, including: determining that that the touch screen is working in a track mode; when a finger is sliding on the touch screen, obtaining a sliding track of the finger and displaying the sliding track on both the terminal device and the head-mounted display device synchronously, wherein the sliding track is used to locate the position of the finger on the touch screen; when a switching condition is satisfied, switching the touch screen from the track mode to a trigger mode; and when an operation instruction to the touch screen is detected, triggering the touch screen to perform the corresponding function in accordance with the operation instruction. Compared with existing technologies, the method and device provided by this invention have a higher control precision of the touch screen, do not need to add additional hardware and thus reduce the cost invested.

Abstract: The present disclosure discloses a system and a method for inputting a gesture in a 3D scene. The system comprises a gesture acquiring unit configured to simultaneously acquire at least two channels of video stream data in real time at different angles for a user's gesture; a gesture recognizing unit configured to recognize a gesture shape varying in real time from the at least two channels of video stream data; a gesture analyzing unit configured to analyze the gesture shape varying in real time to obtain corresponding gesture motion; and a gesture displaying unit configured to process the gesture motion into a 3D image and display the 3D image in the 3D scene in real time. The technical solutions of the present disclosure can display the user's real gesture in the 3D scene, thereby enhancing the real effect of the system and improving the user's usage experience.

Abstract: This invention discloses a method and device for controlling a touch screen, including: determining that that the touch screen is working in a track mode; when a finger is sliding on the touch screen, obtaining a sliding track of the finger and displaying the sliding track on both the terminal device and the head-mounted display device synchronously, wherein the sliding track is used to locate the position of the finger on the touch screen; when a switching condition is satisfied, switching the touch screen from the track mode to a trigger mode; and when an operation instruction to the touch screen is detected, triggering the touch screen to perform the corresponding function in accordance with the operation instruction. Compared with existing technologies, the method and device provided by this invention have a higher control precision of the touch screen, do not need to add additional hardware and thus reduce the cost invested.

Abstract: The present disclosure discloses a system and a method for reproducing an object in a 3D scene. The system comprises an object acquiring unit configured to simultaneously acquire at least two channels of video stream data in real time at different angles for an object to be displayed; an object recognizing unit configured to recognize a shape of the object varying in real time from the at least two channels of video stream data; an object tracking unit configured to obtain corresponding object motion trajectory according to the shape of the object varying in real time; and an object projecting unit configured to process the shape of the object varying in real time and the corresponding object motion trajectory into a 3D image and superposition-project the 3D image into the 3D scene in real time. The technical solutions of the present disclosure can reproduce the object in the 3D scene, and achieve the purpose of displaying the real object in the 3D scene.

Abstract: An anode composite material for lithium ion battery and a preparation method thereof. The composite material is a composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4, wherein 0.95?a?1.1, 0.95?b?1.1, and M is at least one of Fe, Co, Ni and Mn. The content of at least one of SiCO, SiCNO, SiCN and SiBCN in the anode composite material is in a range of 1-20 wt % of the total weight of the composite material. The composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4 is obtained by adding LiaMbPO4 into at least one organosilicon polymer of polysiloxane, polysilazane, and polyborosilazane, and then curing, crosslinking, and pyrolyzing. Compared with LiaMbPO4, the composite material has a notable improvement in electrochemistry performance and tap density.

Abstract: An anode composite material for lithium ion battery and a preparation method thereof. The composite material is a composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4, wherein 0.95?a?1.1, 0.95?b?1.1, and M is at least one of Fe, Co, Ni and Mn. The content of at least one of SiCO, SiCNO, SiCN and SiBCN in the anode composite material is in a range of 1-20 wt % of the total weight of the composite material. The composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4 is obtained by adding LiaMbPO4 into at least one organosilicon polymer of polysiloxane, polysilazane, and polyborosilazane, and then curing, crosslinking, and pyrolysing. Compared with LiaMbPO4, the composite material has a notable improvement in electrochemistry performance and tap density.

Abstract: An electrochemical method for producing Si nanopowder, Si nanowires and/or Si nanotubes directly from compound SiX or a mixture containing a silicon compound SiX, the method comprises: providing an electrolysis cell having a cathode, an anode and an electrolyte, using the compound SiX or the mixture containing compound SiX as a cathode and immersing the cathode in an electrolyte comprising a metal compound molten salt, applying a potential between the cathode and the anode in the electrolysis cell, and forming one or more of Si nanopowder, Si nanowires and Si nanotubes on the cathode electrode. The method has advantages of: 1) shorter production processing, 2) inexpensive equipment, 3) convenient operation, 4) reduction of contaminate, 5) easily available feed materials, and 6) easy to achieve continuous production. This is a new field of using electrochemical method for producing one-dimensional Si nano material, and a new method of producing Si nanopowder, Si nanowires and Si nanotubes.

Abstract: Encoding a video signal according to a scalable video coding (SVC) technique employs two different encoding paths for the base layer and the enhancement layers respectively, whereby the two encoding paths share common hardware encoding modules. For example, a control module can route received video information associated with the base layer directly to the hardware encoder modules for encoding, while routing video information associated with the enhancement layers to an upscaler. The upscaled video information is then provided to the hardware encoder module for processing in similar fashion to the base layer information. The hardware encoder provides encoded video information to another control module, which determines whether to route the information to a hardware or software entropy encoder, based on whether the encoded video information is associated with the base layer or an enhancement layer, respectively.

Abstract: An electrochemical method for producing Si nanopowder, Si nanowires and/or Si nanotubes directly from compound SiX or a mixture containing a silicon compound SiX, the method comprises: providing an electrolysis cell having a cathode, an anode and an electrolyte, using the compound SiX or the mixture containing compound SiX as a cathode and immersing the cathode in an electrolyte comprising a metal compound molten salt, applying a potential between the cathode and the anode in the electrolysis cell, and forming one or more of Si nanopowder, Si nanowires and Si nanotubes on the cathode electrode. The method has advantages of: 1) shorter production processing, 2) inexpensive equipment, 3) convenient operation, 4) reduction of contaminate, 5) easily available feed materials, and 6) easy to achieve continuous production. This is a new field of using electrochemical method for producing one-dimensional Si nano material, and a new method of producing Si nanopowder, Si nanowires and Si nanotubes.

Abstract: A high resolution bathymetric sidescan sonar system for measuring micro-geomorphy of the sea bottom having an underwater vehicle, an underwater electronic subsystem mounted on the underwater vehicle and containing a transmitter and a receiver, and two sonar arrays mounted symmetrically on two sides of a lower part of the underwater vehicle and being connected to the underwater electronic subsystem through a cable. Each sonar array has a transmitting linear array and three or more parallel receiving linear arrays. The parallel receiving linear arrays are arranged at equal spaces, and the space d between two adjacent parallel receiving linear arrays is ?>d??/2, in which ? is a wavelength of an acoustic wave, and an operation frequency of the parallel receiving linear arrays ranges from 30 kHz to 1200 kHz.