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

The invention discloses a triaxial test apparatus of soil under water-soil chemical action and a method thereof, and relates to a testing technique of soil under a special environment. The device comprises a device frame (10), a triaxial pressure chamber (20), a confining pressure exerting and deformation test device (30), a solution cyclic displacement device (40), a stress / strain control loading device (50), a displacement sensor (60) and a data collecting and processing device (70). The uniformity of ingredients and concentration of internal pore water solution of a specimen is ensured by solution circulation; the change rules of soil deformation and strength caused by chemical solution transfusion under constant stress can be simulated and researched; the confining pressure exerting principle is improved; accurate measurement of body deformation is achieved; and the conversion of strain control and stress control can be achieved.

The invention belongs to the technical field of water circulation of water conservancy projects and particularly relates to a distributed-type river basin water deficit calculating method based on terrain and soil characteristics. The method comprises the following steps: step1, processing basic data of an underlying surface of a river basin; step 2, counting grid terrain indices within basin perimeters; step 3, calculating soil characteristic parameters within the basin perimeters; step 4, quantitatively expressing distribution of river basin water deficit; and step 5, drawing cumulative distribution curves of river basin water deficit to acquire a calculating model of distributed-type river basin water deficit. when being applied to real-time flood forecasting, The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics can substantially improve accuracy of flood forecasting and provide reliable scientific support for river basin flood-prevention early warning and the like. The distributed-type river basin water deficit calculating method based on the terrain and soil characteristics is not only suitable for a lumped-type hydrological model but also suitable for a distributed-type hydrological model and can effectively promote in-depth development of river basin hydrology science research.

The invention discloses a method for extracting the width of river channels within a basin by using a digital elevation model. The method comprises the following main steps: the digital elevation model (DEM) data of the basin are extracted; the slope grids, river channel grids and confluence accumulative grids of the basin are calculated according to the digital elevation model (DEM) data of the basin; near-river channel slope grids are extracted by using the slope grids and the river channel grids; near-river channel confluence accumulative grids are extracted by using the confluence accumulative grids and the river channel grids; moving average calculation is performed on the basis of the near-river channel slope grids, so that moving averaged near-river channel slope grids can be obtained; and the width of the river channels within the basin is extracted on the basis of the near-river channel confluence accumulative grids and the moving averaged near-river channel slope grids. The method of the invention has the advantages of stable and reliable data sources, high calculation efficiency, objective and reasonable results and the like. With the method adopted, the rapid calculation and extraction of the width of the river channels within the basin can be benefitted.

The invention relates to the field of power quality and energy saving analysis of a rail transit, and in particular to a power quality and energy saving analysis system for the rail transit, which comprises a file management system, an energy-saving technical system and a decision support system. The system is based on the Visual Studio 2010 software development platform using the C # programming language and the database SQL2008. On the basis of utilizing the computer technology and the database technology, the invention realizes the related energy-saving work management and the information management of technical documents on the one hand and the power consumption check, statistic and analysis relating to a tested unit on the other hand. Based on comprehensive analysis of energy consumption data, the energy consumption of the power consuming unit is evaluated, therefore, providing a more reasonable basis for comprehensively and systematically planning, implementing, checking, controlling and improving various power management activities as well as implementing the whole process of management.

The invention discloses a measuring and calculating method for water conserving and storing capacity of a drainage basin based on soil freeze-thawing. The method comprises the following steps: firstly, processing basic data; secondly, calculating the soil freeze-thawing hydrothermal state in the drainage basin, so as to obtain the proportion of ice content in the soil; then, quantitatively expressing the temporal distribution of the water conserving and storing capacity at various grid points in the drainage basin, and calculating the grid-type soil water conserving and storing capacity index; finally, calculating the water conserving and storing capacity at grid points in a sub-basin of each stage, drawing discretized cumulative distribution curves of the water conserving and storing capacity in all the sub-basins so as to obtain a dynamic measuring and calculating model of the water conserving and storing capacity of soil in the drainage basin of a freeze-thawed area, and measuring and calculating the water conserving and storing capacity of the drainage basin during the soil freeze-thawing. According to the invention, a numerical model is built for a point-scale melted snow-frozen soil hydro-thermal coupling system, and establishes relationship with the water conserving and storing capacity of soil in drainage basin grids, so that the water conserving and storing capacity index of the drainage basin at spatial scale is set dynamically to coincide with the actual situation, and errors caused by the homogenization of a cold region drainage basin are reduced.

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 flexible and effective software test method and a software test device. The method comprises the steps of: when the testability is set, setting the relation among detection information points according to the logical relation of function modules of software, and marking the detection information points in module codes; and when the diagnostic test is performed, selecting the detection information points according to test demand, customizing a script based on the selected detection information points, executing the customized script, and obtaining corresponding detection information for the diagnostic test. The application of the method and the device can ensure that the test is more flexible and more pertinent, improve the validity of the test, and can also increase the depth of the test so as to realize a deep test.

The invention discloses a mountain torrent rapid early warning and forecasting method based on multi-dimensional rainfall characteristic space optimal decision. The method comprises: firstly, calculating initial soil water saturation S of a successive historical rainfall flood process based on a three-layer evapotranspiration principle; secondly, counting the rainfall P of the successive historical rainfall flood process; thirdly, quantifying a rainfall space distribution characteristic K of a successive historical rainfall flood process by combining drainage basin DEM data; calculating a landform unit line of the drainage basin based on the DEM data; taking P, K and S as mutually orthogonal coordinate axes to construct a multi-dimensional rainfall characteristic space coordinate system, establishing a rainfall data point set, dividing the corresponding rainfall data point set into two types of an ultra-alarm subset A and a non-ultra-alarm subset B according to whether the flood process is over-alarm or not, and solving an optimal classification decision equation between the two types of subsets by combining an SVM principle; and if early warning is needed, calculating the runoff process at the outlet of the drainage basin by taking the rainfall as the input of a landform unit line, and carrying out real-time flood forecasting.

The invention relates to an electrical transformer district electricity meter dynamic three-phase single phase line loss acquisition method. The method comprises the following steps: 1, a three-phase rating table is arranged in every electrical transformer district, and three phase components through three-phase rating tables are obtained and are transmitted to a concentrator; 2, the practical phase of a carrier wave from all single phase measurement points is acquired by an electrical transformer district router and is transmitted to the concentrator; 3, an electricity energy acquisition main station request a communication protocol and a measurement point number to the concentrator, and the electrical transformer district rating tables, all the single phase user tables and the electrical transformer district three-phase table electricity power information are acquired from the concentrator; and 4, the line loss of every single phase is calculated through using a single phase line loss formula according to the acquired electrical transformer district rating tables, all the single phase user tables and the electrical transformer district three-phase table electricity power information. Compared with the prior art, the method disclosed in the invention has the advantages of accurate calculation and convenient querying.

The invention relates to an optimal pricing method for electricity sales companies based on a Stackelberg game model. Based on the Stackelberg master-slave game, consider the electricity sales market framework of multiple electricity sales companies and multiple users. Under this framework, multiple electricity sales companies purchase electricity from the superior power grid company at a unified market clearing electricity price, and then determine the electricity sales price information based on their own operating costs and maximize their own profits and release it to each user. According to the electricity price information released by the electricity sales company, each user determines the planned electricity consumption on the basis of combining their own electricity consumption benefits and maximizing their own electricity consumption revenue, and reports the planned electricity consumption to the electricity sales company. This paper establishes the marginal cost pricing model among the upper-level electricity sales companies, and the lower-level multi-user electricity benefit optimization model. Finally, the algorithm for solving the game is given, and the optimal pricing strategy is verified and analyzed through an example.

The invention discloses a method for estimating the storage capacity of small and medium-sized reservoirs in a data-free area. The method comprises the following steps of: calculating a flow directionand a confluence accumulation value of each grid above a reservoir outlet point by utilizing drainage basin DEM data; extracting riverway grids in the drainage basin; dividing the watershed river channel grids into reservoir area river channel grids and non-reservoir area river channel grids; extracting upstream grids corresponding to the non-reservoir area river channel grids; fitting elevation-distance curves of non-reservoir area river channel grids; weighting the elevation-distance curve of each non-reservoir area river channel grid, and solving the elevation-distance curves of the reservoir area river channel grids; based on the elevation-distance curves of the reservoir area river channel grids, obtaining elevation correction values of the reservoir area river channel grids; counting the non-reservoir area river channel grids, and solving elevation correction values of the non-reservoir area river channel grids; setting the reservoir surface water level, and calculating the reservoir storage capacity according to the reservoir area elevation correction values. The method has the advantages of being stable and reliable in data source, high in calculation efficiency, objectiveand reasonable in result and the like, and facilitates rapid estimation of small and medium-sized reservoir storage capacity in the data-free area.

The invention discloses a method for searching a similar watershed based on a spatial dimension division theory. The method comprises the following steps: firstly, dividing a drainage basin into a plurality of orthogonal grid units based on DEM data to obtain an elevation in each grid unit, thereby obtaining an elevation grid Raster_Ele of the drainage basin, and calculating to obtain an elevationfractal dimension value Fra_Ele; secondly, calculating the gradient in each grid unit to obtain a gradient grid Raster_Slope of the drainage basin, and calculating to obtain a gradient fractional dimension value Fra_Slope; next, calculating the slope direction in each grid unit to obtain a slope direction grid Raster_Slope Dir of the drainage basin, and calculating to obtain a slope direction sub-dimension value Fra_Slope Dir; and finally, constructing a multi-dimensional feature space, generalizing a drainage basin into data points, labeling the data points in the multi-dimensional feature space, and classifying the data points, so that the drainage basin divided into one class is regarded as a similar drainage basin.

The invention discloses a critical rainfall estimation method based on rainfall spatial distribution. The critical rainfall estimation method comprises the steps that firstly, estimating the confluence flow velocity in each grid unit in a hydrological response unit secondly, on the basis of the confluence flow velocity in each grid unit, obtaining a confluence time grid in the drainage basin; performing spatial interpolation on the time-interval rainfall data observed by the station to obtain a rainfall spatial distribution grid, and combining the convergence time grid to obtain a time-interval dynamic rainfall index; counting an accumulated dynamic rainfall index before a flood peak occurs in the flood process; then counting the tension water content saturation, namely the initial soil water content saturation, of the day before the flood process begins; finally, whether the flood is an over-alarm flood is judged, and making a cumulative dynamic rainfall indicator - initial soil watercontent saturation scattering point graph on the basis of multiple floods and i, marking points corresponding to the overwanted flood, and drawing a critical rainfall line in combination with the points corresponding to the overwanted flood.

The invention discloses a reconfiguration runoff production simulation method based on underlying surface features, and belongs to the technical field of hydrology, and the method comprises the following steps: S1, packaging runoff production calculation modes, and respectively numbering the runoff production calculation modes; S2, calculating to obtain a terrain index grid based on the basin DEMdata; S3, extracting to obtain vegetation grids and soil grids in the drainage basin; and S4, dividing the drainage basin into four areas of GX, DX, GC and FC based on the terrain index grid, the soilgrid and the vegetation grid, and respectively matching different runoff production modes in different areas to perform runoff production calculation. The accuracy and reliability of the calculationresult solve the problem of runoff calculation in mountainous small and medium-sized watersheds with obvious underlying surface feature spatial variation; a basin digital elevation model is mainly applied, rapid and automatic judgment suitable for different runoff production calculation method areas in a basin and direct calling of a runoff production calculation method based on underlying surfacecharacteristics are facilitated, and deep development of digital hydrology and mountain torrent prevention and treatment research of mountainous small and medium-sized basins is promoted.

The invention provides a multifunctional experiment chicken embryo culture and detection device which comprises a culture and detection cabin and a computer control box. The culture and detection cabin is provided with a sealing and thermal insulation door. A vertical rotary disc is mounted inside the culture and detection cabin and is driven by a rotary disc motor, a plurality of hanging supports are evenly mounted on the vertical rotary disc, and a plurality of experiment chicken embryo see-through protecting racks are fixed onto the lower portion of each hanging support. The computer control box automatically controls a carbon dioxide sensor, an oxygen concentration sensor, a temperature and humidity sensor, an infrared irradiator, an infrared embryo temperature detecting matrix, a constant-temperature decontamination unit, an ultraviolet irradiator, an automatic embryo turning device, an activity detector and an oxygen supply system control element inside the culture and detection cabin so as to perform temperature and humidity control, oxygen supplement, position changing, turning, cleaning and sterilizing and infrared and ultraviolet irradiation on culturing experiment chicken embryos, and experiment chicken embryo activity and maturity can be detected automatically during culture and displayed through a display. The multifunctional experiment chicken embryo culture and detection device has the beneficial effect that the multifunctional experiment chicken embryo culture and detection device is developed, so that difficulties of automatic culture and detection, performed in a multifunctional and synchronous manner, of the experiment chicken embryos are solved.

The invention discloses a real-time mountain floodv early warning method based on critical rainfall of rainfall time-history distribution. The rainfall data in a T period before a flood peak appears in each previous flooding process are firstly extracted, and the cumulative rainfall in the T period is calculated; then, a Lorenz curve is constructed based on the rainfall data in the T period beforea flood peak appears, the Gini coefficient of the Lorenz curve is calculated, and based on the Gini coefficient, the rainfall in the T period before the flood peak appears is divided into three types; the tension water content saturation, that is, initial soil water content saturation, at the T time before the flood peak appears is then counted; whether each previous flood is an over-alarm floodis judged, cumulative rainfall-initial soil water content saturation scatter diagrams for rainfall in even, uneven, and concentrated types are made respectively, points corresponding to the over-alarmfloods are marked, and a critical rainfall line is drawn in combination of the points corresponding to the over-alarm floods; and real-time early warning is finally carried out according to the critical rainfall line.

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 provides a shielding device for automatically checking the pressure resistance and leakage safety of a poisoning cabin. The shielding device comprises a shielding cabin controlled by a computer controller, wherein a plurality of high-pressure spray heads are arranged in the shielding cabin provided with the poisoning cabin in the internal centre; liquid soap is sprayed to the outer surface of the poisoning cabin by the high-pressure spray heads before a poisoning experiment; the poisoning cabin is pressurized by the pressurization valve and the pressurization air pump of a positive pressure controller; safety routine check is automatically carried out on the pressure resistance and leakage of the poisoning cabin; the inner pressure of the poisoning cabin is displayed by a pressure resisting valve and a pressure resisting display instrument; the outer surface of the poisoning cabin is cleaned and wastewater is drained by a water drainage valve after the check; then a flow controller is adjusted and a poisoning valve is opened, then the experiment gas generated by a poisoning gas source is conveyed into the poisoning cabin according to the required concentration and flow to carry out a poison gas exposure experiment; the poison and harmful gases after the conclusion of experiment neutralization are exhausted to the outside through a poison discharge valve and a negative pressure fan. The shielding device provided by the invention has the beneficial effects that a shielding device for automatically checking the pressure resistance and leakage safety of a poisoning cabin is developed, and the problem of safely carrying an accurate poisoning experiment without leakage is solved.

The invention discloses a method of measuring concentration of suspend-dispersed fullerene in a natural water body, wherein the method includes the steps of: 1) establishing a fullerene-toluene solution standard working curve; 2) measuring standard concentration of a stable fullerene dispersed water solution; 3) establishing a simulative standard working curve of fullerene concentration in a natural water body by means of a dual-wavelength ultraviolet spectrophotometry method; and 4) calculating the concentration of the suspend-dispersed fullerene in the to-be-tested natural water body by means of the simulative standard working curve of fullerene concentration in a natural water body in the step 3). The method is effective in measurement of the concentration of suspend-dispersed fullerene (C60) in a natural water body, and can promote deep development of researching on water environment behavior and biotoxicity of the fullerene (C60) in the field of environmental science and technology.

The invention discloses a full-distributed confluence simulation method considering the influence of a reservoir in a drainage basin, and the method comprises the steps of obtaining the gradient, the flow direction and the confluence accumulated value of each grid unit in a target drainage basin; dividing the grid units in the target drainage basin into reservoir grids and non-reservoir grids based on the position of the reservoir; constructing a storage and discharge model of the reservoir grids, and obtaining the discharge quantity of each reservoir grid based on the model; constructing a confluence model of non-reservoir grid units based on an MCT method, and obtaining the discharge quantity of each non-reservoir grid based on the model. According to the method provided by the invention, the digital elevation data of the target drainage basin is applied, the data source is stable and reliable, the influence of the reservoir in the drainage basin on confluence calculation is considered, the calculation result is accurate and reasonable, meanwhile, the problem of confluence calculation of the drainage basin with the reservoir is solved, and deep development of digital hydrology and hydrological model research is facilitated.

The invention discloses a basin similarity classification method and device. The method comprises the steps of collecting the hydrological, meteorological and underlying surface data of a predetermined basin, extracting meteorological and underlying surface factors, and constructing a feature index; setting a correlation threshold value, and determining weather and underlying surface similarity indexes; based on an SOM and FCM fusion algorithm, carrying out grid scale hydro meteorological zoning in the predetermined basin; constructing a sub-basin scale cluster in the meteorological homogeneous region, and performing sub-basin classification by using the fusion model; and according to the meteorological subarea where the basin is located and the included sub-basin categories, constructing comprehensive measurement of the similarity of the basin by using the fuzzy membership degrees of the sub-basins, evaluating the similarity degree between the basins by using a maximum and minimum closeness degree method, and identifying the similarity between the basins. According to the method, a theoretical basis is provided for reference basin selection and parameter transplantation of the data-free basin, and deep development of work such as data-free region model parameter regionalization and hydrological early warning and forecasting is promoted.

The invention relates to a gastric tube fixing patch, a fixing method and a tensile force experiment method of the gastric tube fixing patch. The patch is a planar patch, a plurality of cuts are formed in the center and two sides of the top end of the planar patch, and thus a multi-petal flower shape is formed. Nasal skin is cleaned, the front end of a gastric tube is inserted into a specified position of the nasal cavity after the nasal skin is dried, and one gastric tube fixing patch is taken; the tail end of a long tail is folded inwards along a cut mark, a tiny non-sticky surface is formed, then back lining paper of the multi-petal flower shape part is uncovered and pasted on one side of the nose bridge of a patient, and back lining paper of the long tail is uncovered; a paste film at the joint of a starting section and the multi-petal flower shape is inwards and axially folded to be pasted, and a linear shape is formed in appearance; then the gastric tube is supported to be close to the nose wing side, the long tail of the paste film moves along the gastric tube and flatly pasted on the wall of the gastric tube; the gastric tube is suspended after pasting. With the adoption of the gastric tube fixing patch, the gastric tube falling rate of the patient is obviously reduced, a traditional gastric tube fixing mode is thoroughly changed, the problem about home nursing of patients with long-term gastric tube indwelling is solved, and good social benefit is created.

The invention discloses a method for determining a water collection area threshold value during digital river network extraction, and the method comprises the steps: carrying out the recognition of awatershed water body through watershed remote sensing image data, and carrying out the rasterization of a water body recognition result; calculating a confluence accumulation value of each grid unit in the drainage basin by utilizing the watershed DEM data, and generating a confluence accumulation grid; extracting the closest possible river channel in the river basin according to the minimum threshold value of the confluence accumulation value; calculating the river channel reliability within a certain range one by one by taking the grid unit on the closest possible river channel as a center according to the rasterized water body recognition result; and according to the rasterized river channel reliability, establishing a relation curve of a threshold value and a river channel reliabilitymean value, and determining a critical threshold value point which is a water collection area threshold value. The method has the advantages of being stable and reliable in data source, high in calculation efficiency, objective and reasonable in result and the like, and facilitates determination of a basin water collection area threshold value and extraction of a digital river network.

The invention discloses a reconfiguration confluence simulation method based on underlying surface features, and belongs to the technical field of hydrology. The reconfiguration confluence simulationmethod comprises the following steps: 1, packaging confluence calculation modes and numbering the confluence calculation modes respectively; 2, calculating to obtain a gradient grid Raster_Slope, a flow direction grid Raster_Dir and a confluence accumulation grid Raster_Acc on the basis of the basin DEM data; 3, extracting and obtaining river channel grids and slope surface grids in the drainage basin, and grading the river channel grids; and 4, dividing grids in the graded drainage basin based on the gradient grids and the riverway into four areas of KP, YP, MH and FH, and respectively matching different confluence modes in different areas to perform confluence calculation. The reconfiguration confluence simulation method guarantees the precision and reliability of a calculation result, solves a problem of confluence calculation in mountainous small and medium-sized watersheds with obvious underlying surface feature spatial variation, facilitates the direct call of a confluence calculation method based on underlying surface features, and promotes the deep development of digital hydrology and mountainous small and medium-sized watershed mountain torrent prevention and control research.

The invention discloses nostoc sphaeroids kutz oligosaccharide as well as a preparation method and application thereof. The method for preparing the nostoc sphaeroids kutz oligosaccharide is simple, reasonable, stable, efficient and suitable for large-scale production, meanwhile, the nostoc sphaeroids kutz polysaccharide and oligosaccharide prepared through the scheme can prolong the survival time of caenorhabditis elegans under the oxidative stress condition, the survival rate of the caenorhabditis elegans is increased, the nostoc sphaeroids kutz polysaccharide and oligosaccharide have the in-vivo anti-oxidation effect, the nostoc sphaeroids kutz oligosaccharide can also improve the chemical avoidance index of Huntington chorea disease model caenorhabditis elegans, has a certain neuroprotective effect, and can be applied to adjuvant therapy drugs for nervous system diseases and health-care food with a neuroprotective effect, so a new strategy is provided for prevention and treatment of nervous system diseases and health aging, and the nostoc sphaeroids kutz oligosaccharide is worthy of popularization and application; and deep development and application of natural polysaccharide products can be promoted.

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.