Abstract: The present disclosure discloses a tobacco leaf foliar spraying substance for reducing harmful ingredients in cheroot, a method for reducing carcinogenic components in flue-cured tobacco leaves and flue-cured tobacco shreds. The tobacco leaf foliar spraying substance contains a lotus leaf extract, the harmful chemical ingredients comprise N-nitrosonornicotine, 4-(N-methyl-nitrosamine)-1-(3-pyridinyl)-1-butanone, N-nitrosoanabasine and N-nitrosoanatabine. Foliar spraying is performed on a fertile field by using the lotus leaf extract before tobacco leaves are harvested and modulated, which not only significantly promotesagronomic characters and economic traits of tobacco and alleviates tobacco leaf browning but also effectively reduces harmful chemical ingredients unique to tobacco leaves, such as nitrosamine and nicotine.

Abstract: A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.

Abstract: An intelligent bridge acceleration method and system based on a dual-communication device. By monitoring the online interactive application initiates a link at a household client-side, the data link is intercepted and the data packet is forwarded to the dual-communication device in the same LAN. WiFi is used as a primary path to perform data transmit-receive operations and a transmission quality monitoring mechanism is enabled. When an abnormal data transmit-receive through the WiFi is monitored via the transmission quality monitoring mechanism, a packet loss compensation strategy of a mobile data network is started; and the mobile data network is used as a secondary path for the data transmit-receive. When the data transmit-receive becomes normal, the data transmit-receive operations through the secondary path are stopped. Subsequently, the WiFi is continued to be used as the primary path to perform data transmit-receive operations, and the WiFi quality monitoring is continued to be performed.

Abstract: An intelligent bridge acceleration method and system based on a dual-communication device. By monitoring the online interactive application initiates a link at a household client-side, the data link is intercepted and the data packet is forwarded to the dual-communication device in the same LAN. WiFi is used as a primary path to perform data transmit-receive operations and a transmission quality monitoring mechanism is enabled. When an abnormal data transmit-receive through the WiFi is monitored via the transmission quality monitoring mechanism, a packet loss compensation strategy of a mobile data network is started; and the mobile data network is used as a secondary path for the data transmit-receive. When the data transmit-receive becomes normal, the data transmit-receive operations through the secondary path are stopped. Subsequently, the WiFi is continued to be used as the primary path to perform data transmit-receive operations, and the WiFi quality monitoring is continued to be performed.