Abstract: A cold plate includes an opposing portion, a cover portion, and a heat exchange chamber. The opposing portion opposes a heat generating component on one side in a first direction. The cover portion is arranged on another side of the opposing portion in the first direction. The heat exchange chamber includes at least the opposing portion and the cover portion to conduct heat from the heat generating component to a refrigerant through the opposing portion. The opposing portion includes a first cooling surface and a second cooling surface. The first cooling surface is provided on the one side in the first direction. The second cooling surface is provided on the one side in the first direction. The second cooling surface is spaced away from the first cooling surface in the first direction.

Abstract: A cooling assembly is connectable with a cold plate that comes into thermal contact with a heat source, and includes a first manifold, a second manifold, and a radiator. The first manifold causes a refrigerant having circulated through a first pipe to flow out from outflow ports toward the cold plate. In the second manifold, the refrigerant flowing into inflow ports from the cold plate circulates through a second pipe. In the radiator, the refrigerant having circulated through the second pipe circulates through the flow paths arranged side by side at intervals. Each of the first and second pipes opposes a portion of the radiator in the first direction.

Abstract: A motor includes a shaft, a bearing that rotatably supports the shaft, and a hub fixed to the shaft. The shaft includes a first shaft portion extending in an axial direction, a second shaft portion projecting axially upward from an axially upper end surface of the first shaft portion and including a diameter smaller than that of the first shaft portion, and a screw hole recessed axially downward from the axially upper end surface. The hub includes a shaft fixing hole into and in which the second shaft portion is inserted and fixed. An outer surface of the second shaft portion includes a first region, and a second region axially above the first region, and including surface roughness smaller than that of the first region.

Abstract: A motor includes a shaft, a bearing that rotatably supports the shaft, and a hub fixed to the shaft. The shaft includes a first shaft portion extending in an axial direction, a second shaft portion projecting axially upward from an axially upper end surface of the first shaft portion and including a diameter smaller than that of the first shaft portion, and a screw hole recessed axially downward from the axially upper end surface. The hub includes a shaft fixing hole into and in which the second shaft portion is inserted and fixed. An outer surface of the second shaft portion includes a first region, and a second region axially above the first region, and including surface roughness smaller than that of the first region.

Abstract: To derive a feasible solution for an operation plan problem for storage tanks for storing liquefied natural gas, which is a complicated mixed-integer non-linear problem, given tank initial state information, reception plan information, and feed plan information, two solving processes are executed alternately two or more times, respectively: a first solving process that replaces a mixed-integer non-linear programming problem with a mixed-integer linear programming problem by linear approximation of a non-linear expression in non-linear constraints containing the non-linear expression, and solves the problem to derive provisional solutions or final solutions for a reception pattern that prescribes a storage tank that is to receive liquefied natural gas, and a discharge pattern that prescribes a storage tank that is to discharge liquefied natural gas, and a second solving process that replaces a mixed-integer non-linear programming problem with a continuous non-linear programming problem by provisionally fixing

Abstract: To derive a feasible solution for an operation plan problem for storage tanks for storing liquefied natural gas, which is a complicated mixed-integer non-linear problem, given tank initial state information, reception plan information, and feed plan information, two solving processes are executed alternately two or more times, respectively: a first solving process that replaces a mixed-integer non-linear programming problem with a mixed-integer linear programming problem by linear approximation of a non-linear expression in non-linear constraints containing the non-linear expression, and solves the problem to derive provisional solutions or final solutions for a reception pattern that prescribes a storage tank that is to receive liquefied natural gas, and a discharge pattern that prescribes a storage tank that is to discharge liquefied natural gas, and a second solving process that replaces a mixed-integer non-linear programming problem with a continuous non-linear programming problem by provisionally fixing