Abstract: A signal transmitting and receiving system and a method thereof are provided in this disclosure.

Abstract: The present disclosure relates to a system and method for capturing movement trajectories of particulate matter. The system includes: micro lidar measurement equipment and a camera. The micro lidar measurement equipment includes: a laser device, a pitching platform, and a protective casing for the laser device, and the laser device is located on the pitching platform. The laser device is configured to emit a laser. The camera is configured to shoot the laser, determine particulate matter concentrations according to a grayscale of pixels and a height of the pixels in a photo shoot, and compare differences in spatial distribution of particulate matter concentrations at different time to obtain the movement trajectories of the particulate matter.

Abstract: A smart bed body structure includes: a bed body, a control unit, a speech recognition unit and an audio device. The control unit is electrically connected with the speech recognition unit; the speech recognition unit is electrically connected with the audio device. The bed body includes: a load-bearing mechanism, at least one turnover mechanism and a base. The control unit and the audio device are arranged on the bottom face of the load-bearing mechanism. The load-bearing mechanism is arranged on the top face of the base, the turnover mechanisms being arranged between the load-bearing mechanism and the base, the load-bearing mechanism can be upwards turned over relative to the base by means of the turnover mechanisms. The control unit is electrically connected with the turnover mechanisms.

Abstract: A breeze device of an electric bed, relating to the field of electric beds, and comprising a remote controller, a first single chip microcomputer (100), a second single chip microcomputer (200), an electric bed motor (300), and a fan (400). The remote controller is wirelessly connected to the first single chip microcomputer (100); the first single chip microcomputer (100) is electrically connected to the electric bed motor (300); the second single chip microcomputer (200) is electrically connected to the first single chip microcomputer (100); the second single chip microcomputer (200) is electrically connected to the fan (400). The present invention integrates the power supplies and the remote controllers of an electric bed control system and a breeze system, reduces the costs, and improves convenience when a user uses an electric bed.

Abstract: A method for determining a fugitive emission factor (EF) and a leakage rate of a combustion source. For a combustion source capable of performing stack emission and fugitive emission, an organized EF, a fugitive EF, and a leakage rate of fugitive emission are respectively obtained through calculation based on material balance. The method solves the problem that it is impossible to collect a total amount of smoke and to quantify its volume in a field test and the problem that a conventional carbon mass balance (CMB) method cannot distinguish organized leakage from fugitive leakage. The method can be used not only for determining gas leaked from residential indoor stoves using coal, biomass, etc., but also for determining fugitive emissions from other sources, such as the amount of gas leaked to the surrounding environment through the body of a brick kiln in a brick and tile factory.