Abstract: A system and method for in-situ amelioration of saline-alkali soil using microalgae. Sewage and microalgal seeds are pumped into an microalgae growth pond for growing microalgae, and online equipment is used for monitoring the level of nutrients in the pond. When the microalgae reach the stationary phase of their growth, the screen mesh is lifted to separate microalgae from liquid, so that they are conveniently harvested by scraping. The harvested microalgae are returned to the soil as a soil ameliorant.

Abstract: Disclosed are a towing device for a vehicle and a vehicle. The towing device includes a front end portion and a rear end portion connected to the front end portion, where the front end portion is arranged on a rear floor and a rear floor cross member, so as to disperse an external force borne by the front end portion to the rear floor cross member; and the rear end portion includes a connecting seat and a tow hook connected to the connecting seat and extending out towards an exterior of the vehicle, the connecting seat being arranged on a rear anti-collision beam, so as to transmit an external force borne by the rear end portion to longitudinal members by means of the rear anti-collision beam and energy absorption boxes.

Abstract: Embodiments of the present disclosure provides a tuning device for a receiving coil, a cryogenic probe, and a magnetic resonance device. The tuning device may include a fixed capacitor, a varactor assembly, and a control assembly. The fixed capacitor and the coil may be connected in series. The varactor assembly may be connected in parallel to both ends of the fixed capacitor. The control assembly may be configured to control the capacitance of the receiving coil by controlling the capacitance value of the varactor assembly to perform a tuning operation on the receiving coil, the tuning operation including at least one of a frequency tuning and an impedance tuning.

Abstract: A curing agent for disposal of municipal solid waste incineration (MSWI) fly ash and a preparation method and use method thereof are provided. In the present disclosure, a loofah nanofiber crystal, a rice husk ash (RHA), sodium hydroxide, and water are adopted as raw materials to prepare the curing agent, and the curing agent can effectively realize the safe disposal and curing of heavy metals in an MSWI fly ash. The highest curing rates of the curing agent for heavy metals Pb2+, Zn2+, Cd2+, Cr3+, and Cu2+ can reach 99.7%, 99.4%, 99.5%, 98.7%, and 99.5%, respectively. The special three-dimensional (3D) cross-linked network structure of the loofah nanofiber crystal and the excellent physical and chemical adsorption properties and ion exchange capacity of the RHA are fully used in the curing agent of the present disclosure.

Abstract: A curing agent for disposal of municipal solid waste incineration (MSWI) fly ash and a preparation method and use method thereof are provided. In the present disclosure, a loofah nanofiber crystal, a rice husk ash (RHA), sodium hydroxide, and water are adopted as raw materials to prepare the curing agent, and the curing agent can effectively realize the safe disposal and curing of heavy metals in an MSWI fly ash. The highest curing rates of the curing agent for heavy metals Pb2+, Zn2+, Cd2+, Cr3+, and Cu2+ can reach 99.7%, 99.4%, 99.5%, 98.7%, and 99.5%, respectively. The special three-dimensional (3D) cross-linked network structure of the loofah nanofiber crystal and the excellent physical and chemical adsorption properties and ion exchange capacity of the RHA are fully used in the curing agent of the present disclosure.

Abstract: A system and method for in-situ amelioration of saline-alkali soil using microalgae. Sewage and microalgal seeds are pumped into an microalgae growth pond for growing microalgae, and online equipment is used for monitoring the level of nutrients in the pond. When the microalgae reach the stationary phase of their growth, the screen mesh is lifted to separate microalgae from liquid, so that they are conveniently harvested by scraping. The harvested microalgae are returned to the soil as a soil ameliorant.

Abstract: Disclosed are a towing device for a vehicle and a vehicle. The towing device includes a front end portion and a rear end portion connected to the front end portion, where the front end portion is arranged on a rear floor and a rear floor cross member, so as to disperse an external force borne by the front end portion to the rear floor cross member; and the rear end portion includes a connecting seat and a tow hook connected to the connecting seat and extending out towards an exterior of the vehicle, the connecting seat being arranged on a rear anti-collision beam, so as to transmit an external force borne by the rear end portion to longitudinal members by means of the rear anti-collision beam and energy absorption boxes.

Abstract: A method and a device for controlling service transmission can implement service forwarding. The method includes: receiving a connection request message, where the connection request message includes user information; determining value-added service system VAS information according to the user information; receiving a first data packet of the service that is sent by a sending end; obtaining, according to the VAS information, a second data packet from the at least one destination VAS; and sending the second data packet to a receiving end. A VAS performs value-added processing on a data packet, and returns the data packet to a gateway device, allowing the gateway device to perform service arrangement flexibly according to dynamic information about a user.

Abstract: A method and a device for controlling service transmission can implement service forwarding. The method includes: receiving a connection request message, where the connection request message includes user information; determining value-added service system VAS information according to the user information; receiving a first data packet of the service that is sent by a sending end; obtaining, according to the VAS information, a second data packet from the at least one destination VAS; and sending the second data packet to a receiving end. A VAS performs value-added processing on a data packet, and returns the data packet to a gateway device, allowing the gateway device to perform service arrangement flexibly according to dynamic information about a user.