51results about How to "Promote in-depth development" patented technology

The invention relates to a mountainous area reservoir area riverway water surface width estimation method. Further development is made on the basis of a river width model constructed under the naturalcondition, the relative reasonable and reliable mountainous area reservoir area riverway width estimation method is provided, the distributed model confluence calculation accuracy is improved, the problem about estimation of the small and medium-sized basin mountainous area reservoir area riverway width lake of observational data is solved, important essential data are provided for reservoir flood control regulation, hydraulic power generation, channel improvement and the like, the reservoir regulation scientificity is improved, and safety of downstream zones can be better and practically protected. The mountainous area reservoir area riverway water surface width estimation method is mainly applied to a drainage basin digital elevation model, data sources are stable and reliable, the computational efficiency is high, the result is objective and reasonable, automation generation of drainage basin riverway width and direct calling of a distributed hydrologic forecasting model are facilitated, and the development of digital hydrology, the distributed hydrologic forecasting model and reservoir scientific management is promoted.

The invention discloses a method for extracting the width of a river channel in a watershed by using a digital elevation model, which includes the following main steps: extracting digital elevation model (DEM) data of the watershed; calculating the gradient grid of the watershed, the river channel grid and the accumulation of confluence by using the DEM data of the watershed Grid; use the slope grid and river grid to extract the slope grid near the river; use the cumulative grid and river grid to extract the cumulative grid near the river; perform slider average calculation on the basis of the slope grid near the river , to obtain the slope raster near the river after the average calculation of the slider; combined with the cumulative grid of confluence near the river, the slope raster near the river after the average calculation of the slider can extract the channel width in the watershed. The invention has the advantages of stable and reliable data sources, high calculation efficiency, objective and reasonable results, etc., and is beneficial to the rapid calculation and extraction of river channel width in a watershed.

The invention provides an in-vitro eyeball fixing device with an adjustable size. The in-vitro eyeball fixing device comprises an eyeball stand, wherein the eyeball stand is fixedly arranged on lifting frame legs and is provided with a universal lift handle; a middle inner hole is formed in the center of the eyeball stand; a plurality of movable support rods are arranged at the edge of the eyeball stand; one end of each movable support rod is connected with the eyeball stand through a centering small shaft; a movable rotary ring is arranged between the movable support rods and the eyeball stand, and is supported by constrained bearings, and is provided with an adjusting handle and slide shift shafts; each slide shift shaft penetrates through a strip slide groove in the middle section of the corresponding movable support rod and drives the corresponding movable support rod to synchronously move along the same direction; the sliding of each movable support rod can be prevented by antiskid inner teeth and a handle spring on the adjusting handle; a flexible protecting support is arranged at the top end of each movable support rod, and is used for fixing in-vitro eyeballs adaptive to different diameters due to the distance change of the movable support rods without injuries. The in-vitro eyeball fixing device has the beneficial effects that the size can be adjusted, and the in-vitro eyeballs with different diameters can be fixed; the subsequent experiment, testing, dissection and other medical scientific and research work of human and animal in-vitro eyeballs can be conveniently and rapidly performed.

The invention discloses a method for extracting drainage basin free water storage capacity space distribution by utilizing terrain indexes. The method comprises the main following steps that drainage basin digital elevation model (DEM) data is extracted; drainage basin terrain index grids are calculated by utilizing drainage basin DEM data; statistics is conducted on cumulative frequency curves of the drainage basin terrain index grids; equations of the terrain index cumulative frequency curves are calculated; the equations of the terrain index cumulative frequency curves and equations of drainage basin free water frequency curves are synthesized to solve the corresponding function relationship about the terrain indexes and free water storage capacity; the free water storage capacity of each terrain index grid unit is solved based on the function relationship so as to obtain drainage basin free water storage capacity space distribution. The method has the advantages of being stable and reliable in data source, high in computational efficiency, objective and reasonable in result and the like and facilitates direct invoking of distributed hydrologic models.

The invention discloses a method for automatically recognizing exit points during a drainage basin digitalization process. The method includes: reading the original data of a digital elevation model of a to-be-researched area and performing preprocessing; positioning the positions of hydrology stations in a riverway grid matrix, and judging whether the hydrology stations are located on the riverway grids or not; extracting the control area of the potential exit points of a drainage basin according to a grid control area matrix, and calculating the relative error between the area and the hydrology station water collecting area; judging whether the absolute value of the relative error is smaller than a set allowed area error or not; correcting the potential exit points of the drainage basin according to a flowing direction matrix; finishing recognition. By the method, automatic recognition and correction of the potential exit points of the drainage basin can be achieved, positioning precision of the exit points is guaranteed, human intervention is avoided, and drainage basin digitalization efficiency is increased.