Abstract: Systems and methods of generating ground truth datasets for producing virtual reality (VR) experiences, for testing simulated sensor configurations, and for training machine-learning algorithms. In one example, a recording device with one or more cameras and one or more inertial measurement units captures images and motion data along a real path through a physical environment. A SLAM application uses the captured data to calculate the trajectory of the recording device. A polynomial interpolation module uses Chebyshev polynomials to generate a continuous time trajectory (CTT) function. The method includes identifying a virtual environment and assembling a simulated sensor configuration, such as a VR headset. Using the CTT function, the method includes generating a ground truth output dataset that represents the simulated sensor configuration in motion along a virtual path through the virtual environment.

Abstract: This disclosure describes systems, methods, and devices related to neighbor awareness networking (NAN) operations in the 6 GHz frequency band. A NAN device may generate a first NAN frame including a first indication of a NAN operation capability, and a second indication of a transmit power of the NAN device. The NAN device may send the first NAN frame and may identify a second NAN frame received from a second NAN device, the second NAN frame including a third indication of the NAN operation capability, and a fourth indication of a transmit power of the second NAN device. The NAN device may determine, based on the transmit power of the NAN device and the transmit power of the second NAN device, an operation parameter for the 6 GHz frequency band. The NAN device may establish, based on the operation parameter, a NAN connection using the 6 GHz frequency band.

Abstract: Provided are a wireless signal apparatus and an elevator service request system and method, which belong to the field of intelligent elevator control technologies. In the elevator service request system of the present invention, a corresponding wireless signal is broadcast by a wireless signal apparatus of an elevator system and the wireless signal is received by a personal mobile terminal. The personal mobile terminal is provided with an elevator service request application component running at an application layer of an operating system thereof. The wireless signal apparatus includes a location notification unit used for broadcasting corresponding location marker data. The elevator service request system includes a wake-up module running at a system layer of the operating system of the personal mobile terminal. The wake-up module is used for waking up the elevator service request application component in response to reception of the location marker data.

Abstract: Various methods of reshaping and recycling thermoset polymers and composites containing thermoset polymers are provided. The methods involve the bond exchange reaction of exchangeable covalent bonds in the polymer matrix with a suitable small molecule solvent in the presence of a catalyst. In some aspects, the methods are applied to a carbon fiber reinforced polymer or a thermoset polymer where the thermoset polymer matrix includes a plurality of ester bonds. Using a small molecule alcohol, the methods provide for recycling one or both of the carbon fiber and the polymer, for welding two surfaces, or for repairing a damaged surface in the materials.

Abstract: The present application provides a device for detecting a defect in a steel cord ply. The device is configured to obtain an enhanced magnetic field signal of the steel cord ply and detect a defect of the steel cord ply based on the enhanced magnetic field signal. The device includes a magnetic field unit including a permanent magnet configured to generate a background magnetic field; a signal obtaining unit configured to generate an enhanced magnetic field signal of a steel cord ply based on a plurality of first magnetic field signals and a plurality of second magnetic field signals; and a defect detecting unit configured to detect a defect of the steel cord ply based on the enhanced magnetic field signal, wherein the defect detecting unit includes an AD converting module, a signal processing module, a defect detecting module, a display module, and a control module.

Abstract: A constant temperature system is provided, including: a HVAC system; a first thermostat configured to control the HVAC system; a second thermostat for replacing the first thermostat; an application in a terminal device for guiding installation of the second thermostat. The terminal device includes a display screen. The application is configured to: obtain a first wiring connection mode, determine a system configuration of the HVAC system, determine a type of an energy source for driving the HVAC system to operate, obtain a second wiring connection mode according to the first wiring connection mode, instruct a user to replace the thermostat according to the second wiring connection mode; obtain control logic matching the system configuration and the type of the energy source to enable the second thermostat to control the HVAC system when the second thermostat and the HVAC system are connected in the second wiring connection mode.

Abstract: The embodiment of the present application discloses a Bluetooth communication method, comprising: detecting a posture of a mobile terminal; establishing a Bluetooth connection with a desired Bluetooth device when a first posture is detected; and/or disconnecting the Bluetooth connection when a second posture is detected, wherein the second posture is different from the first posture.

Abstract: The disclosure generally relates to filaments and in particular, filaments for use in fused filament fabrication to prepare 3D printed articles. The filaments may be prepared from a polymer composition comprising: A) 55 to 95 weight percent semi-aromatic copolyamide having a melting point; and B) 5 to 45 weight percent amorphous copolyamide having a melting point.

Abstract: A method of data transmission includes: receiving a first packet, where the first packet includes first compressed data and a first check value, the first compressed data is obtained by compressing first data based on a first compression mode, the first check value is obtained by processing a second check value based on a first check algorithm, the second check value is obtained by processing the first compressed data based on a second check algorithm; obtaining a first check code by processing the first packet based on a third check algorithm; determining, according to a correspondence between the first check code and the first compression mode, that the first compression mode is a compression mode used when the first data is compressed; and obtaining the first data by decompressing, based on a first decompression mode corresponding to the first compression mode, the first compressed data included in the first packet.

Abstract: An experimental system for studying a refining mechanism and characteristic of a refiner plate, including a disc refiner unit, a first storage tank, a second storage tank, a circulating pump, a pipeline system, a detection device for measuring process variables including flow, pressure and temperature, and a data acquisition and control system. An operation parameter control system is provided to control an operation state of valves at different positions of the pipeline system to achieve the switching of the operation mode of the experimental system. The data acquisition and control system is configured to collect the parameters at different detection points. A method for operating the experimental system is also provided.

Abstract: A cone shaped pin (16) for tower wall attachment is disclosed. The pin comprises a cone (22) with a first head (23) and a second head (24), the first head is larger than the second head. The pin further comprises an internal hole (18a) which is at least accessible from the second head. A system (15) for tower wall attachment and a method for mounting the system are also disclosed. In the case of using the system comprising the pin, tower wall attachment is better and safer than that in the art, and welding is avoid, thus greatly simplifies the process of fixing and improves the performance of the tower.

Abstract: Disclosed are additive manufacturing compositions comprising: A) 100 to 30 weight percent of a polyamide composition comprising: a) 95 to 5 weight percent of at least one semi-crystalline copolyamide having a melting point, said semi-crystalline copolyamide comprising: i) 5 to 40 mole percent aromatic repeat units derived from one or more aromatic dicarboxylic acids with 8 to 20 carbon atoms and at least one aliphatic diamine with 4 to 20 carbon atoms; and ii) 60 to 95 mole percent aliphatic repeat units derived from one or more aliphatic dicarboxylic acids with 6 to 20 carbon atoms and one or more aliphatic diamines with 4 to 20 carbon atoms; b) 5 to 95 weight percent of at least one amorphous copolyamide comprising: iii) 60 to 90 mole percent aromatic repeat units derived from isophthalic acid and at least one aliphatic diamine with 4 to 20 carbon atoms; and iv) 10 to 40 mole percent aromatic repeat units derived from terephthalic acid and at least one aliphatic diamine with 4 to 20 carbon atoms; and B) 0 t

Abstract: This invention is directed to a biodegradable polymer that can be degraded in vivo. The biodegradable polymer comprises a biodegradable polymer segment having at least a biodegradable bond and two or more cationic components, wherein each of said cationic components is covalently attached to the biodegradable polymer segment and the two cationic components/molecules are separated by at least one biodegradable bond in the backbone. The biodegradable polymer can be used for targeting desired ceils in vivo including T cells, NK (natural killer) ceils, cancer cells, or a combination thereof, delivering genes, DNA, oligodeoxynucleotide, oligonucleotide, RNA, mRNA, RNAi, siRNA, microRNA, protein, peptide, antibody, fragment of an antibody, small molecule drug including chemotherapy drugs, or other bioactive agents into cells, or being used as a vaccine or drug for treating a disease such as a cancer in a subject.

Abstract: The disclosure generally relates to filaments and in particular, filaments for use in fused filament fabrication to prepare 3D printed articles. The filaments may be prepared from a polymer composition comprising: A) 55 to 95 weight percent semi-aromatic copolyamide having a melting point; and B) 5 to 45 weight percent amorphous copolyamide having a melting point.

Abstract: The present invention comprises a composition and method of use for providing durable dirt pickup resistance to architectural coatings. Such compositions comprise a coating base and a post-modified crosslinkable fluoropolymer additive, such that the coatings additive is allowed to migrate to the coating surface and further cure once applied to a substrate. The compositions of the present invention provide durability to coating compositions, while also providing surface effects such as increased water and oil contact angles, enhanced dirt pickup resistance, and enhanced cleanability to the coating films.

Abstract: An optical structure for processing the light output by a lighting unit, in which an antenna (36) is formed within or over an region (34) of the optical layer (23) of the structure, wherein the region (34) is away from the optical beam processing parts (21) a of the optical layer (23).

Abstract: A method and apparatus for system call command batch processing are provided. The method enable system call commands of a same type to be processed in a same CPU core according to a sequence of entering a kernel, thereby ensuring that returned results of the system call commands are sequential.