Abstract: Systems, devices, and methods are discussed for limiting exposure of internal network operations beyond the boundary of a secure network.

Abstract: The present invention provides a low-energy coastal beach restoration method, comprising: constructing a convex beach berm, determining an aspect ratio of the beach berm edge, determining a beach face slope, performing sand replenishment, determining the dredging zone and dredging depth, and determining the steps of building a sediment groin. The present invention utilizes the feature of the convergence effect of the wave energy on the headland, artificially constructs a convex headland shaped beach berm, and determines the required beach face range and slope according to the convex beach berm edge. During beach restoration, dredging around the beach face, while reducing mud sources and increasing the nearshore water depth, it also builds a convex nearshore terrain, which effectively increases the wave energy at the restoration site and improves the coast muddy situation of low-energy coasts.

Abstract: The present invention provides a low-energy coastal beach restoration method, comprising: constructing a convex beach berm, determining an aspect ratio of the beach berm edge, determining a beach face slope, performing sand replenishment, determining the dredging zone and dredging depth, and determining the steps of building a sediment groin. The present invention utilizes the feature of the convergence effect of the wave energy on the headland, artificially constructs a convex headland shaped beach berm, and determines the required beach face range and slope according to the convex beach berm edge. During beach restoration, dredging around the beach face, while reducing mud sources and increasing the nearshore water depth, it also builds a convex nearshore terrain, which effectively increases the wave energy at the restoration site and improves the coast muddy situation of low-energy coasts.

Abstract: The present invention discloses a roll-over floating mixed multi-habitat submersible based on built-in driving principle comprising an outer spherical shell, a propulsion unit, an inner spherical shell, a rolling power unit, a buoyancy adjusting unit and a steering unit; the inner spherical shell can be set in the outer spherical shell rotating in the first axis direction relative to outer spherical shell; the roller power unit can be set in the inner spherical shell, capable of rotating around the second axis to generate an eccentric moment to advance or retract the submersible; the buoyancy adjusting unit and steering unit are installed in the space between the outer spherical shell and the inner spherical shell, wherein the buoyancy adjusting unit is capable of causing the submersible to sink or float in the water body and the steering unit is capable of driving the inner spherical shell to rotate relative to the outer spherical shell; The first axis is perpendicular to the second axis.