3results about How to "Prevent random changes" patented technology

This utility model discloses an integrated machine for laying double-layer plastic film and drip irrigation tape, comprising: a frame; a drip irrigation tape placement shaft mounted on the frame, with two drip irrigation tape rolls sleeved on the placement shaft; a white plastic film placement shaft mounted on the frame, with a white plastic film roll sleeved on the white plastic film placement shaft; a black plastic film placement shaft mounted on the frame, with a black plastic film roll sleeved on the black plastic film placement shaft; and a film pressing shaft assembly mounted on the frame. This integrated machine can lay black and white plastic film and drip irrigation tape completely in one operation, which not only improves agricultural efficiency, but also allows the black plastic film to inhibit weed growth, the laid white plastic film to lower the soil surface temperature and prevent seeds from being burned by high temperatures, while also helping to maintain soil moisture and promote seed germination. The laid drip irrigation tape achieves water conservation and eliminates the need for manual watering.

The utility model provides a rotatable soft tissue clamp capable of being opened and closed repeatedly, which relates to the technical field of medical equipment and comprises a grip sleeve, the bottom of the grip sleeve is rotatably connected with a first connecting sleeve, and the top of the grip sleeve is rotatably connected with a second connecting sleeve. The handle is characterized in that one ends of the first connecting sleeve and the second connecting sleeve in the handle sleeve are connected with each other, and one side of the second connecting sleeve is movably connected with a lifting rod in a penetrating manner. According to the device, one finger presses the bottom of the supporting rod to separate the clamping block from the limiting ratchet wheel, the other hand rotates the second connecting sleeve to drive the second connecting sleeve to rotate, the finger pressing the supporting rod is loosened after rotation is completed, a second spring releases elastic potential energy, and the top of the supporting rod gets close to the second connecting sleeve; and the second connecting sleeve is limited through the supporting rod, so that the clamp can adjust the clamping angle, and meanwhile, the clamp has a self-locking function after adjustment so as to prevent the angle from being changed at will during use.

This invention discloses a roughness limiting method and system for forecasting dual-super-flood systems based on hydrodynamic stability constraints, relating to the field of hydraulic control technology. The method includes the following steps: acquiring runoff boundary data output by the dual-super-flood generation model for the current time step; inputting the feedforward input and the hydrodynamic state variables obtained in the previous time step into the hydrodynamic model to generate the system state feedback deviation for the current time step; monitoring the asymptotic stability of the current system state space based on the system state feedback deviation; if the monitoring result shows that the asymptotic stability condition is met, converting the derived hydrodynamic state variables into a target control reference signal; if the monitoring result shows that the asymptotic stability condition is not met, restoring the current system state space to the hydrodynamic state variables obtained in the previous time step. This invention eliminates the risk of control command distortion.