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This application discloses a microchannel design method, product, and medium for a heat exchanger, comprising: receiving design constraint parameters; the design constraint parameters including: surface design domain parameters of the heat exchanger and initial shape parameters of the trenches; forming an initial microchannel layout diagram with multiple trenches deployed within the surface design domain according to the surface design domain parameters and the initial shape parameters of the trenches; solving for the optimal curve shape parameters based on a preset parameterized model between the curve shape parameters of the trenches and the heat dissipation efficiency of the heat exchanger, with the goal of maximizing the heat dissipation efficiency of the heat exchanger; and obtaining a microchannel design diagram of the heat exchanger based on the optimal curve shape parameters; wherein, the curve shape parameters characterize the bending morphology of the trenches.

The invention provides a sampling device for tumor hepatobiliary surgery, and relates to the field of medical instruments, the sampling device comprises a control mechanism, the control mechanism comprises a calibration bushing plate, one end of the calibration bushing plate is provided with a controller, the outer surface of the periphery of the calibration bushing plate is provided with an adjusting seat, the adjusting seat is provided with an adjusting frame and an adjusting cylinder, and the adjusting frame is connected with the adjusting cylinder. A butt joint frame is arranged at one end of the adjusting frame and one end of the adjusting cylinder, and a hydraulic cylinder is arranged on the calibration bushing. According to the device, after the controller is controlled, the driver is driven, the connector drives the lifting frame and the connecting frame to conduct descending adjustment so as to expand outwards to enable the silica gel clamping hand to be unfolded, and then a worker presses a pressing plate to enable a hydraulic cylinder to descend; after reaching the position needing to be clamped, a worker only needs to control the controller to sample the liver and gall needing to be sampled.