Abstract: A boundary protection method and system of a radiation detection robot. The boundary protection method comprises: a first laser radar and a second laser radar are arranged diagonally, a first marking rod and a second marking rod are arranged diagonally; a boundary of an interlocking zone is defined by the first laser radar, the second laser radar, the first marking rod and the second marking rod; the object to be detected is placed in the interlocking zone; the radiation detection robot uses rays to detect the object to be detected in the interlocking zone; an early warning zone is provided outside the interlocking zone; wherein when it is detected that a person or object has intruded into the interlocking zone, the radiation detection robot stops emitting rays; and when it is detected that a person or object has intruded into the early warning zone, a warning is issued directly.

Abstract: The present application provides a positive electrode and a lithium-ion battery. The positive electrode comprises a current collector; a first active material layer comprising a first active material; and a second active material layer; wherein the first active material layer is arranged between the current collector and the second active material layer, the first active material layer comprises a first active material, and the first active material is at least one selected from a group consisting of a modified lithium transition metal oxide positive electrode material and a modified lithium iron phosphate. The positive electrode of the present application helps to improve the thermal stability of the lithium-ion battery, and the improvement of the thermal stability may reduce the proportion of the thermal runaway when the lithium-ion battery is internally short-circuited so that the safety performance of the lithium-ion battery is improved.

Abstract: For a parallel biaxial hinge capable of downsizing and retrieving linear movement of large amplitude and important force, the hinge has an axial direction drive portion for retrieving a predetermined operating output accompanied by rotation of a hinge portion for rotating a first and second hinge shafts relative to each other. The axial direction drive portion has a follower part on the hinge portion for rotating relative to the first hinge shaft accompanied by rotating movement of the hinge portion, and a cam part having a cam groove on an outer circumferential surface engaged with the follower part and provided by outer-fitting onto the first hinge shaft so as to be movable relative to first attaching plate. The cam part moves in a rotation axis line direction of the first hinge shaft with the engaged portion guided by the follower part.

Abstract: For a parallel biaxial hinge capable of downsizing and retrieving linear movement of large amplitude and important force, the hinge has an axial direction drive portion for retrieving a predetermined operating output accompanied by rotation of a hinge portion for rotating a first and second hinge shafts relative to each other. The axial direction drive portion has a follower part on the hinge portion for rotating relative to the first hinge shaft accompanied by rotating movement of the hinge portion, and a cam part having a cam groove on an outer circumferential surface engaged with the follower part and provided by outer-fitting onto the first hinge shaft so as to be movable relative to first attaching plate. The cam part moves in a rotation axis line direction of the first hinge shaft with the engaged portion guided by the follower part.