Abstract: A device for launching and recovering a box sampler includes a suspension coop, a rail assembly, a moving mechanism, a power unit, and a lifting frame. The rail assembly is fixedly arranged on a deck. The moving mechanism is arranged on the rail assembly and can move along the rail assembly. A fixed end of the power unit is articulated with a top end of the moving mechanism, and an extending end of the power unit is articulated with an open end of an upper frame of the lifting frame. A closed end of the upper frame of the lifting frame is articulated with a front end of the moving mechanism. According to the device for launching and recovering a box sampler, the box sampler can be smoothly launched and recovered. The sampler in the suspension coop can be kept horizontal and is prevented from severely shaking.

Abstract: A device for launching and recovering a box sampler includes a suspension coop, a rail assembly, a moving mechanism, a power unit, and a lifting frame. The rail assembly is fixedly arranged on a deck. The moving mechanism is arranged on the rail assembly and can move along the rail assembly. A fixed end of the power unit is articulated with a top end of the moving mechanism, and an extending end of the power unit is articulated with an open end of an upper frame of the lifting frame. A closed end of the upper frame of the lifting frame is articulated with a front end of the moving mechanism. According to the device for launching and recovering a box sampler, the box sampler can be smoothly launched and recovered. The sampler in the suspension coop can be kept horizontal and is prevented from severely shaking.

Abstract: Disclosed are a crack self-healing agent for cement-based materials capable of binding corrosive ions in seawater, and a preparation method thereof. A core material of the agent is an active inorganic composite component capable of chemically binding Cl, Mg, and S, a wall layer is polymethyl methacrylate, and an interface improvement layer is a cement layer. A preparation method includes: (1) thoroughly mixing active components capable of binding corrosive ions, and filling a resulting mixture into a direct compression mold; (2) applying a pressure to the direct compression mold and holding the pressure on using a pressing machine, and demolding to obtain a core material body; (3) placing the core material body obtained in a solution of PMMA in acetone for coating, and taking out the core material body and drying; (4) coating a layer of cement before the acetone is completely volatilized to obtain the crack self-healing agent.

Abstract: Disclosed are a lightweight conductive mortar material, a preparation method therefor and use thereof. The lightweight conductive mortar material includes the following components in parts by weight: 100 parts of cement, 25 parts to 60 parts of a conductive porous lightweight aggregate loaded with a modified agar gel, and 30 parts to 45 parts of water.

Abstract: Disclosed are a lightweight conductive mortar material, a preparation method therefor and use thereof. The lightweight conductive mortar material includes the following components in parts by weight: 100 parts of cement, 25 parts to 60 parts of a conductive porous lightweight aggregate loaded with a modified agar gel, and 30 parts to 45 parts of water.

Abstract: Embodiments in accordance with the present invention relate to heat exchangers, and more specifically to graphitic foam (GF) heat exchanger assemblies developed for a plurality of thermal management applications including the management of heat from electronic components, primary engine cooling and energy recovery. According to certain embodiments, these assemblies are designed using a pressure normal to the GF exchange element to ensure thermal contact without the use of bonding materials or methods. The bondless assembly is designed to be resistant to high thermal stresses and large thermal expansion coefficient differences thereby achieving and maintaining the highest possible thermal performance.