Abstract: A pneumatic pollination device and a method for hybrid rice seed production with a large row ratio are provided. The pneumatic pollination device includes a pneumatic pollination component, a controller, a lifting adjustment component and a four-wheel power chassis. The pneumatic pollination component is mounted at the front part of the four-wheel power chassis through the lifting adjusting component, and the controller is mounted at the upper part of the four-wheel power chassis. The airflow of each pollination pipe respectively acts on the spike part of the male parent row of corresponding hybrid rice, so that the male pollen is separated from stamens and floats to the female compartment. The airflow velocities of the pollination pipes of respective male parent rows are different to ensure that the pollen is conveyed to the main female parent action region.

Abstract: A hand-held pneumatic pollinator for hybrid rice seed production and a method thereof are provided. The pollinator includes a hand-held power chassis, a lifting assembly, a pneumatic pollination assembly, and a control assembly. A position of each of air blowing pipes relative to an ear of the male parent is adjusted by the control assembly and the lifting assembly. The pneumatic pollination assembly is provided with a plurality of air blowing pipes, of which the number is less than rows of the male parent of a hybrid rice seed production with a relatively large row ratio. Each air blowing pipe is located between corresponding two rows of the male parent during pollination. The directional, uniform and constant airflow at an air blowing port blows a pollen off a stamen to transport the pollen to the female parent compartment.

Abstract: The present disclosure provides a spectrum access method and system using prior knowledge-based double-action reinforcement learning, and belongs to the technical field of electromagnetic spectrum. The method includes evaluating and screening prior knowledge, initializing a Q-table, and confirming a current state; and performing Q-learning by: firstly, decomposing an action space into two dimensions with an action in one dimension defined as a channel chosen by an agent, and an action in the other dimension defined as a number of time slots of an access channel, and choosing actions in turn according to the dimensions; then performing spectrum access according to the actions chosen; and finally, updating the Q-table in combination with biased information, wherein the biased information is a reward value. The system is configured to implement the proposed method. By adoption of the method, better performance is achieved, and the efficiency of spectrum access can be improved.

Abstract: A dynamic spectrum sharing method based on user online learning and low-overhead cooperation is provided. In the method, a secondary user (SU) obtains spectrum sharing scene information and requirement parameters; then initializes state parameters and spectrum sensing parameters of a channel. At the beginning of each slot, the SU determines whether a direct transmission condition is met according to the transmission condition of the previous slot, and directly continues transmission on the channel of the previous slot or obtains an idle channel according to the channel state and spectrum sensing for transmission, and updates state parameter and spectrum sensing parameter. Finally, an SU base station performs conflict coordination according to the channel occupancy condition for a fixed number of slots.

Abstract: The present invention provides a dynamic spectrum sharing method based on user online learning and low-overhead cooperation, and relates to the technical field of electromagnetic spectrums. The method comprises: first, a secondary user obtaining spectrum sharing scene information and requirement parameters; then initializing a state parameter and a spectrum sensing parameter of a channel; then, at the beginning of each time slot, the secondary user determining whether a direct transmission condition is met or not according to the transmission condition of the previous time slot, selecting to directly continue transmission on the channel of the previous time slot or obtain idle channel according to the channel state and spectrum sensing for transmission, and updating the state parameter and spectrum sensing parameter of the channel; and finally, a base station of the secondary user performing conflict coordination according to the channel occupancy condition every a fixed number of time slots.

Abstract: A pneumatic pollination device and a method for hybrid rice seed production with a large row ratio are provided. The pneumatic pollination device includes a pneumatic pollination component, a controller, a lifting adjustment component and a four-wheel power chassis. The pneumatic pollination component is mounted at the front part of the four-wheel power chassis through the lifting adjusting component, and the controller is mounted at the upper part of the four-wheel power chassis. The airflow of each pollination pipe respectively acts on the spike part of the male parent row of corresponding hybrid rice, so that the male pollen is separated from stamens and floats to the female compartment. The airflow velocities of the pollination pipes of respective male parent rows are different to ensure that the pollen is conveyed to the main female parent action region.

Abstract: A hand-held pneumatic pollinator for hybrid rice seed production and a method thereof are provided. The pollinator includes a hand-held power chassis, a lifting assembly, a pneumatic pollination assembly, and a control assembly. A position of each of air blowing pipes relative to an ear of the male parent is adjusted by the control assembly and the lifting assembly. The pneumatic pollination assembly is provided with a plurality of air blowing pipes, of which the number is less than rows of the male parent of a hybrid rice seed production with a relatively large row ratio. Each air blowing pipe is located between corresponding two rows of the male parent during pollination. The directional, uniform and constant airflow at an air blowing port blows a pollen off a stamen to transport the pollen to the female parent compartment.