Abstract: Provided is a titanium-zirconium co-doped carbon-coated lithium iron phosphate material and a production method and use thereof. The material has a chemical formula of Li1-yZryFe1-xTixPO4/C, wherein titanium is doped to Fe site, zirconium is doped to Li site, 0.001?x?0.05, and 0.001?y?0.02. The production method comprises mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid medium, ball-milling and sand-milling the mixture to a certain slurry particle size, spray-drying the slurry for granulation, and then sintering the dried spray material in an atmosphere furnace. In the present disclosure, by doping titanium and zirconium elements into carbon-coated lithium iron phosphate, the ion and electron transport capacity of lithium iron phosphate is effectively enhanced and the compaction density of the material is improved. The material is very suitable to be used as a positive electrode material for a lithium-ion power battery.

Abstract: The present disclosure provides a superhydrophobic and self-cleaning anticoagulant composite coating material and a preparation method and use thereof, and relates to the technical field of biomedical materials. In the coating material provided by the present disclosure, a titanium dioxide nanotube-based structure increases microscopic roughness of a surface of a titanium-based metal substrate, and a hydrophobic modification layer reduces surface energy of the material. The rough structure and the hydrophobic modification layer have a synergistic effect to construct a superhydrophobic surface, making the surface of the material have self-cleaning characteristics and low adhesion. Air can be retained on the surface of the material to form an air layer, thereby reducing the contact area between the material and bacteria and platelets in the blood, and inhibiting adhesion of the bacteria, platelets, and plasma proteins to the material.

Abstract: An identity authentication method is disclosed in embodiments of the present application. When a requester and an authentication access controller perform identity authentication using an authentication mechanism of a pre-shared key, the identity information of entities is transmitted in the form of ciphertext, thereby preventing the identity information of the entities from being exposed during the transmission, so that attackers cannot obtain private or sensitive information. The mutual or unilateral identity authentication between the authentication access controller and the requester is achieved while ensuring the confidentiality of the entity identity and related information, thereby laying a foundation for ensuring that the user accessing the network is legitimate and/or the network accessed by the user is legitimate.

Abstract: A rapid construction method for a secondary lining of a small-section tunnel includes steps of: transporting and store secondary lining steel bars to a designated position in the tunnel with a steel bar transport vehicle and a wheel type dump truck; after the tunnel is cleaned, simultaneously constructing the secondary lining from two ends to a middle of the tunnel; constructing a lower inverted arch with a customized inverted arch formwork and then constructing an upper arch wall with a plurality of portal arch wall formwork trolleys; wherein the portal arch wall formwork trolleys form a set, and are connected by hinges, so as to construct in a curve tunnel. The rapid construction method has a long single construction section, and procedure connection is compact, thereby realizing rapid and efficient construction of the secondary lining.

Abstract: A rapid construction method for a secondary lining of a small-section tunnel includes steps of: transporting and store secondary lining steel bars to a designated position in the tunnel with a steel bar transport vehicle and a wheel type dump truck; after the tunnel is cleaned, simultaneously constructing the secondary lining from two ends to a middle of the tunnel; constructing a lower inverted arch with a customized inverted arch formwork and then constructing an upper arch wall with a plurality of portal arch wall formwork trolleys; wherein the portal arch wall formwork trolleys form a set, and are connected by hinges, so as to construct in a curve tunnel. The rapid construction method has a long single construction section, and procedure connection is compact, thereby realizing rapid and efficient construction of the secondary lining.

Abstract: In a method for end-to-end link detection, a link state of a first network device is bound to a reliability detection mechanism session established between the first network device and a second network device, and the first network device detects the link state of the first network device and notifies the second network device of the link state of the first network device through the reliability detection mechanism session. In a method for policy routing switching, the second network device records received link state information of the first network device, configures a relation between a policy routing and a link. The second network device determines a link corresponding to a selected policy routing, and switches a policy routing according to the state of the link. Apparatuses corresponding to the methods also provided. The methods and apparatuses can implement the end-to-end link detection, and initiate switching in time.