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This invention discloses a fractional sampling deviation estimation and compensation method for FBMC systems, including determining training requirements and operating conditions, determining a preset training structure, generating and transmitting FBMC training signals at the transmitter according to the preset training structure, constructing an equivalent complex observation template, obtaining received observations at the target training location, constructing equivalent complex observations suitable for phase processing based on the received observations and the equivalent complex observation template, establishing a linear relationship model between the expanded phase of the training subcarriers and the subcarrier index, calculating the phase slope and estimating the fractional sampling deviation based on the linear relationship model, and performing fractional delay compensation on the received time-domain signal based on the fractional sampling deviation estimate. This invention constructs an equivalent complex observation template based on the preset training structure and the intrinsic interference relationship of FBMC / OQAM, and then constructs equivalent complex observations based on the received observations and the equivalent complex observation template, thereby improving the applicability and stability of fractional sampling deviation estimation and compensation in FBMC systems.

The winter warm type sunlight greenhouse comprises a bottom plate, a greenhouse cover is fixedly connected to the upper side of the bottom plate, a top frame is fixedly connected to the upper side of the greenhouse cover, a photovoltaic panel is fixedly connected to the upper side of the top frame, a door body is arranged on the front side of the greenhouse cover, and a ventilation unit is arranged on the inner side of the greenhouse cover. A glass plate is arranged on the outer side of the top frame, the ventilation unit comprises a fixing rod, the fixing rod is fixedly connected to the upper side of the top frame, a top plate is fixedly connected to the upper end of the fixing rod, and a motor is fixedly connected to the upper side of the top plate. According to the winter warm type sunlight greenhouse based on agriculture and light complementation, by arranging the top frame, the top plate, the rotating rod, the rotating disc, the dispersing plate, the dispersing holes and the fixing cylinder, introduced hot air is conveniently dispersed by the dispersing plate, airflow is dispersed out through the dispersing holes, the hot air introduced into the greenhouse is convenient to be uniform, and growth of crops is facilitated.

The present invention discloses a winter-warm solar greenhouse based on agricultural-photovoltaic complementation, comprising a bottom plate, a greenhouse cover is fixedly connected to the upper side of the bottom plate, a top frame is fixedly connected to the upper side of the greenhouse cover, a photovoltaic panel is fixedly connected to the upper side of the top frame, a door body is arranged on the front side of the greenhouse cover, a ventilation unit is arranged on the inner side of the greenhouse cover, a glass plate is arranged on the outer side of the top frame, the ventilation unit comprises a fixing rod, the fixing rod is fixedly connected to the upper side of the top frame, the upper end of the fixing rod is fixedly connected to the top plate, and the upper side of the top plate is fixedly connected to a motor. The present invention relates to the technical field of solar greenhouses. The winter-warm solar greenhouse based on agricultural-photovoltaic complementation is provided with a top frame, a top plate, a rotating rod, a rotating disk, a dispersion plate, a dispersion hole and a fixed cylinder, so that the hot air introduced is dispersed by the dispersion plate, and the airflow is dispersed out through the dispersion hole, so that the hot air introduced into the greenhouse is uniform, which is convenient for the growth of crops.

This utility model relates to the field of electrical equipment, and discloses an installation structure, a roller assembly, and a cleaning device. The installation structure is simple, enabling convenient and quick disassembly and installation of the dirt-collecting tank, with high installation efficiency. Furthermore, it exhibits good structural stability and high reliability, preventing the dirt-collecting tank from shaking or shifting after installation. This installation structure is used to install the roller assembly of the cleaning device. The roller assembly includes a bracket and a dirt-collecting tank, with the tank detachably mounted on the bracket. The installation structure includes a cover and a dirt-collecting tank limiting structure. The cover is located at one end of the dirt-collecting tank, covering and connecting to the tank, and is detachably connected to the bracket. The dirt-collecting tank limiting structure is located between the cover and the tank, limiting one end of the tank to the cover.