Abstract: A bolter miner includes a rack, a cutting device and a bolt support device. The cutting device is configured for a cutting operation and is arranged on the rack to swing up and down. The bolt support device includes a lifting assembly, a work platform, a first drilling frame assembly and a stabilization assembly. The lifting assembly is arranged between the rack and the work platform and is configured to lift the work platform. The first drilling frame assembly and the stabilization assembly are arranged on the work platform. The first drilling frame assembly has a bolt support position and an avoidance position. The work platform can extend and retract to switch the bolt support position and the avoidance position of the first drilling frame assembly. The stabilization assembly can be supported between the cutting device and a tunnel roof, so as to enhance the stability of the first drilling frame assembly during a bolt support operation.

Abstract: A negative electrode sheet and a battery applying the same are provided. The negative electrode sheet includes a current collector and a negative electrode active coating disposed on two opposite surfaces of the current collector. The negative electrode active coating contains a negative electrode active material, and the negative electrode active material includes graphite. The negative electrode sheet satisfies 0.0025??*?/PD?0.0065, where ? is a porosity of the negative electrode sheet, ? is a surface density of a single surface of the negative electrode sheet with a unit of g/cm2, and PD is a compacted density of the negative electrode sheet with a unit of g/cm3. The compacted density PD, the surface density ?, and the electrode sheet porosity ? of the negative electrode sheet form specific correlation relationships among one another.

Abstract: A double-effective vaccine vector against foot-and-mouth disease virus having a bicistronic expression vector sequence, the bicistronic expression vector sequence is an antisense gene sequence capable of conjugating with 5? UTR of RNA of the foot-and-mouth disease virus genome and an intact sequence of VP1 structural protein gene of the foot-and-mouth disease virus. Animal experiments show that the vaccine vector provides double effects in terms of gene therapy and gene immunization for the prevention and treatment of foot-and-mouth disease in animals. Also provided are construction methods and methods of use of the vaccine vector.

Abstract: A double-effective vaccine vector against foot-and-mouth disease virus having a bicistronic expression vector sequence, the bicistronic expression vector sequence is an antisense gene sequence capable of conjugating with 5? UTR of RNA of the foot-and-mouth disease virus genome and an intact sequence of VP1 structural protein gene of the foot-and-mouth disease virus. Animal experiments show that the vaccine vector provides double effects in terms of gene therapy and gene immunization for the prevention and treatment of foot-and-mouth disease in animals. Also provided are construction methods and methods of use of the vaccine vector.