53 results about "Field practice" patented technology

The present invention provides a baseball practice machine for propelling balls onto a practice field thereby providing simulated hits for use in fielding practice for ball players. The practice machine includes a ball hopper, a propulsion unit for propelling a ball toward a practice field, a movable barrel through which a ball is propelled. A barrel positioner is coupled to the propulsion unit and the movable barrel for adjusting the position of the barrel thereby controlling the trajectory of a propelled ball. A programmable control system controls the operation of the practice machine. Trajectory parameters for the propelled balls are selected from predetermined parameters defining the path of the ball to a location of a practice field where the ball is intended to land. Information defining the dimensions of a practice field are stored in a memory of the control system and used in determining the trajectory parameters.

The invention provides a gas layer and water layer recognition method for a low-porosity and low-permeability reservoir, belonging to the field of oil exploration and development. According to the porosity logging measurement principle, through analyzing factors affecting the logging porosity curve value, the method for recognizing gas layer and water layer in high-salinity mud filtrate and low-porosity and low-permeability gas reservoir is provided by the invention. The gas layer and water layer recognition method based on a low-porosity and low-permeability reservoir provided by the invention is easy to implement, has high operability and is intuitive and clear in recognition; the accuracy of gas layer fluid recognition can be improved greatly while the cost is lowered by utilizing the method provided by the invention; and the method has a wide application range in field practice, and the method has great operability for either low-porosity and low-permeability volcanic rocks or carbonate and sand shale.

The invention relates to the technical field of lawn soilless cultivation and production and discloses a cultivation nutritional stack layer; and the invention also discloses a lawn blanket cultivation method using the cultivation nutritional stack layer as the matrix. According to the technical scheme of the invention, the cultivation nutritional stack layer comprises a seeding layer, a first matrix layer, a fixed layer and a second matrix layer and an isolated layer; the upper surface of the isolated layer is contacted with the lower surface of the second matrix layer; the lower surface of the fixed layer is contacted with the upper surface of the second matrix layer; the lower surface of the first matrix layer is contacted with the upper surface of the fixed layer; and the lower surface of the seeding layer is contacted with the upper surface of the first matrix layer. The lawn blanket cultivation method does not relate to field practices in the process, effectively saves the land sources, has high efficiency and can produce for 4-6 times in one year; and the lawn blanket has short growth period.

The invention belongs to an electric power design institute / station new recruit training and management system, and relates to a training and management method for pre-employment electric power design personnel. The electric power design institute / station new recruit training and management system comprises a basic theoretical knowledge module, a rule standardizing module, a software learning module, a field practice module, an excellent design case module, a new technology subject learning module, a training and checking module, a training effect evaluation module. An online training and management system suitable for electric power design institute / station new recruits before post determining is provided, and new electric power design staff can comprehensively master the basic electric power design skills.

The invention discloses an accurate proppant placement method for hydraulic fracturing of a multi-interlayer oil-gas reservoir. The accurate proppant placement method comprises the steps of firstly obtaining geological parameters and physical parameters of a fracturing interval according to logging data, and dividing the fracturing interval into different small fracturing transformation layers onthe basis; then, optimizing a perforation position according to fracture closing time, and determining the proppant densities of the different fracturing transformation layers in cooperation with field practice; by calculating the proppant settling velocity `affected by sand-carrying concentration and a fracture wall effect, designing the apparent viscosity of fracturing fluids in different smallfracturing transformation layers; and finally, calculating the pumping times of the sand-carrying liquid at different stages according to the thicknesses of different small fracturing transformation layers. According to the design parameters, a proppant can be all paved on a target production layer so that the proppant can be uniformly paved in the longitudinal direction of the production layer after fracture closing. The accurate proppant placement method is reliable in principle and strong in site operability and has a wide market prospect.

The invention discloses an industrial metallurgy dynamic model. The industrial metallurgy dynamic model is made of metal and comprises a coking model system, a sintering model system, a blast furnace ironmaking model system, a converter steelmaking model system, a continuous casting model system and a steel rolling model system, wherein the coking model system, the sintering model system, the blast furnace ironmaking model system, the converter steelmaking model system, the continuous casting model system and the steel rolling model system are sequentially arranged; the coking model system is used for simulating the process that coal carbonization is conducted to produce coke; the sintering model system is used for stimulating the process that iron-containing raw materials, the coke, solvents and water mix and are made into a sphere shape and sintered into blocks; the blast furnace ironmaking model system is used for stimulating the process that iron ores and reducing substances react to obtain pig iron; the converter steelmaking model system is used for stimulating the process that molten iron, scrap steel and iron alloy are made into steel in a converter; the continuous casting model system is used for stimulating the process that the molten steel which is refined in a refining furnace is continuously cast into steel billets; the steel rolling model system is used for stimulating the process that rollers are rotated to change shapes of steel ingots or the steel billets. According to the dynamic model, students can preliminarily know the structure principle and the motion process of industrial metallurgy equipment, teaching can be conveniently and visually conducted, teaching quality can be also improved, and comprehensive ability of the students in the field practice process can be improved.

The invention belongs to the field of teaching application of a virtual reality technology, and provides a virtual learning environment multi-channel fusion display method for field practice teaching,which comprises three steps of content generation, audio-visual channel fusion and multichannel interaction design. According to the characteristics of teaching contents in a VR learning environment,a set of generation method from data acquisition, knowledge organization and scene switching is established; synchronous updating of audio-visual channels is realized through a space rendering mode;the input and output priorities of each interaction channel are evaluated, and the multi-sensory collaborative interaction of learners in the VR learning environment is completed. Through adding of auditory cues and multi-channel user interaction discrimination modes, the VR learning environment fusion display is realized, the sense of reality of a learning environment can be improved, and the immersion experience of participants is improved.

The invention discloses a slope fixed-point parking detection system applied to field practice in a driving school. The slope fixed-point parking detection system comprises a slope detection subsystemand a vehicle-mounted control subsystem, wherein the slope detection subsystem is used for detecting whether the fixed-point parking of a practice vehicle on a slope is qualified or not; the vehicle-mounted control subsystem is used for receiving and analyzing a signal transmitted by the slope detection subsystem, and prompting a student; the slope detection subsystem transmits the signal to thevehicle-mounted control subsystem in a wireless transmission way; the slope detection subsystem comprises a laser ranging module, an active infrared intrusion detection module, a barrier gate triggering radar, a pressure sensing module, a microprocessor, a signal transmission module and a solar power supply module; the barrier gate triggering radar is arranged on a slope kerb of one side of a slope starting point; the laser ranging module is arranged on a slope kerb of one side of a correct vehicle parking lot; the active infrared intrusion detection module is arranged on a slope kerb of one side of a fixed-point parking rod; the pressure sensing module comprises a plurality of pressure sensors; the pressure sensors are arranged at the positions of front wheels of a vehicle at the correctfixed-point parking lot.

The invention belongs to the technical field of computer teaching software, and discloses a virtual teaching system and a virtual teaching method for amber embedded specimen experimental teaching. Thesystem comprises an anatomy acquisition module, an image preprocessing module, a picture export module, a three-dimensional modeling module, a model export module, a map model import module, an interactive production module, a virtual reality module and an information release module. The virtual teaching system comprises an anatomy acquisition module, an image preprocessing module, a picture export module, a three-dimensional modeling module, a model export module, a map model import module, an interactive production module, a virtual reality module and an information release module. The present invention is useful for insects from living environment, morphological characteristics, cameras and video cameras are used to collect images and make videos of insect behaviors and physiological structures into libraries, through the three-dimensional form of insect identification and identification, in the experimental classroom teaching to show to students, can not only improve the teachingeffect, help students better grasp the knowledge of insects, but also lay a solid foundation for field practice.

The invention discloses a tunnel construction virtual teaching system and method based on three-dimensional laser scanning modeling. The tunnel construction virtual teaching system comprises a three-dimensional laser scanner, a computer and a virtual reality helmet, wherein the three-dimensional laser scanner conducts laser scanning, acquires three-dimensional point cloud data of tunnel object surfaces and transmits the data to the computer; the computer conducts three-dimensional numerical modeling to acquire a tunnel spatial structure model with a high precision and resolution ratio; the virtual reality helmet receives signal data sent by the computer and conducts three-dimensional image display. According to the tunnel construction virtual teaching system and method based on three-dimensional laser scanning modeling, equipment is simple, operation is convenient, occupied space is small, a tunnel construction process can be simulated and displayed through a virtual display technology, not only are the dangers of field practice removed, but also a good visual effect and an immersive effect are achieved.

The invention discloses a Web3D network communication platform and a construction method thereof, and the method comprises the steps: integrating unmanned aerial vehicle data, remote sensing data, GISdata, DEM and other multi-source, multi-scale and multi-dimensional data by means of public data and related news information of a Chinese geological survey bureau, and building a multi-dimensional display interface of the communication platform. A 3D model is embedded in the website by adopting a WebGL. JavaScript is used for processing interaction operation between the webpage front end and a user, and the functions of POI point online construction, data uploading, online forum discussion, positioning, multi-dimensional virtual reality interface display and the like are achieved. A rear-enddatabase stores user POI data, forum data and related data, so that the user can check the data in real time, and knowledge transmission and sharing are realized to a great extent. The Web3D networkcommunication platform has a field practice communication function, and topographic map cognition, field route geological examination and mapping, typical geological phenomenon research and analysis and the like can be carried out in combination with practice requirements; and a traditional classroom education mode is broken through.

A select method for strain preventing and curing endotrophic mycorrhiza in potato. Detect width of bacteriostasis braid and select strains with good effects of endotrophic mycorrhiza, do pot incubation test and field practice, detect effects of prevention and cure and fix planting ability. Detect action of the strain to pathogenetic fungi, and induct antiviral ability to potato. Advanced strain is obtained after the steps.

The invention provides a virtual simulation teaching system for helicopter falling-into-water escaping training. The system comprises the components of a teacher subsystem which is used for editing helicopter falling-into-water escaping teaching material by a teacher, uploads the teaching material to a database server and searching the examination score of a student, and a student subsystem whichis used for studying and examination related with helicopter falling-into-water escaping by the student. According to the system, a real scene in helicopter falling-into-water is reproduced through three-dimensional simulation technology, thereby reproducing an escaping training full process of the personnel in compartment correction and overturning of the helicopter. The system operates in an offline and online combination manner. In offline operation, the student performs simulation training according to a teacher request, thereby getting familiar with the use method and the step of the whole simulation system; and in online operation, a processional teacher performs centralized teaching management, resource management, examination management, etc. The system settles a problem of incapability of realizing field practice by a large number of students and supplies an experience opportunity for underwater escaping from the helicopter compartment for the students.

The invention provides a practical training cloud system and method based on cloud computing, and belongs to the technical field of the communication. The realization method comprises the following steps: making courseware and a courseware template, learning courseware and performing field practice. The realization cloud system comprises a network teaching management subsystem and a cloud computing management subsystem; the network teaching management subsystem comprises a courseware management module, a courseware type management module, a courseware learning module, a practical operation management module, and a timing module; the cloud computing management subsystem comprises a resource management module, a resource scheduling module, an authentication management module, and a mirror management module. Through the method provided by the invention, the resource use ratio is improved and the repeated use of the practical operation environment resource is realized by using the cloud computing virtualization function; an operation of installing a client is unnecessary, and all operations can be realized through a browser; audience range is extensive through the network teaching; thepractical operation environment is provided through a virtual machine, the resource use ratio is improved, and the operability of the system is enhanced.

The invention discloses a consolidated sand permeability testing device and test method. The device comprises transparent glass and a pipeline which are cylindrical, wherein rock samples can be accommodated in the pipeline; the device also comprises a rubber hose, a valve, a measuring cylinder and an electrical control system, wherein the rubber hose is used for connecting the transparent glass and the pipeline; the valve is used for controlling whether water flow in the rock samples in the pipeline flows out; the measuring cylinder is used for counting the volume of the water flow; the electrical system is used for controlling opening and closing of the valve. Actual field application is facilitated, the cost is low, and special fields for storage and operation by professionals are not required; in field practice, the test is rapid and simple; with the mode, requirements can be met; time control difficulty is low in the testing process.

The invention discloses a PLC teaching system based on configuration software, a control method and a traffic control system. The PLC teaching system based on configuration software comprises a programmable logic controller, the configuration software, a database and a communication service unit, wherein the programmable logic controller outputs control signals; the communication service unit changes corresponding variable values in the database according to the control signals; an analog display image on a display interface of the configuration software displays a corresponding image according to the variable value in the database. When the method is applied to simulation of the traffic control system, the changes of traffic lights at a crossroad can be displayed visually on the configuration software, understanding of a material object by a student is enhanced, and the student can combine field practice while the PLC theoretical knowledge is learnt.

The invention relates to a simulation exercise device for taking up and binding distribution lines. The simulation exercise device is characterized by comprising a rectangular platform (1); a bracket (6) is installed below the platform (1); three needle-type porcelain bottles (3) are installed on one side of the platform (1); three needle-type porcelain bottles (3) are installed on the side which is opposite to the side on which the three needle-type porcelain bottles (3) are installed; and two butterfly-type porcelain bottles are respectively installed on the other two sides of the platform (1). The invention has the advantage of providing a simulation exercise device for taking up and binding indoor staff training; the problem that outdoor on-site exercise is affected by environment, time, address and the like can be solved; the device is convenient to use, and low in cost; and the device is particularly applicable to integrated training and part-time self-learning of the staff in the distribution line classes.

The invention provides a tension influence coefficient analysis method improving the freedom degree rolling stability and belongs to the technical field of control in the rolling process. By means ofthe method, the recessive relation between the rolling force and the tension and the rolling speed is obtained, the speed limit value is compared with the combination of the field practice, the speedlimit value is equally divided, each equally-divided speed value of outlet racks is obtained, and the speed value of each rack is obtained; then rolling force corresponding to different speed points and the allowed rolling force at the maximum speed are calculated, and the corresponding rolling force obtained after changing of the front tension and the rear tension of the racks is calculated; andfinally, the influence coefficient of the front tension and the rear tension of the racks are calculated. By means of the data statistic analysis method, the relation between the tension and the rolling force of all the racks is quantitatively analyzed, the tension adjusting suggestions of the racks are given, and the forceful support is provided for rolling stability of new products.

The invention discloses a method for mounting a prestressed T-shaped girder at sea by non-rotating synchronous hoisting of double cranes. Firstly, two crawler cranes are fixed on a deck of a square barge, a non-rotating synchronous hoisting process is used to take and mount the T-shaped girder, and during the hoisting and mounting process, the mounting position of the T-shaped girder is controlledonly by raising and lowering crane jibs and by adjusting the hoisting distance, so that potential construction safety hazards can be effectively reduced; secondly, two elevating-type track translational vehicles and girder storage pedestals are arranged on the deck and used to complete the transport and storage of the T-shaped girder on the deck; and finally, a total of four windlasses are arranged respectively at the left front, front right, back left and back right parts of the square barge, and two winches are mounted at the positions, on one side of the square barge, corresponding to thetwo crawler cranes, so as to achieve the stability and accurate positioning of the square barge during the process of taking and mounting the T-shaped girder. By field practice, the method for mounting the prestressed T-shaped girder at sea by non-rotating synchronous hoisting of the double cranes is safe, achieves controllable quality, can effectively reduce the construction cost and improve theconstruction efficiency, and can be promoted for being used in similar projects.

The invention belongs to the teaching application field of virtual reality technology, and provides a virtual learning environment multi-channel fusion display method for field practice teaching, including three steps of content generation, audio-visual channel fusion and multi-channel interaction design. According to the characteristics of the teaching content in the VR learning environment, the present invention establishes a set of generation methods from data collection, knowledge organization and scene switching; through the spatial rendering method, the synchronous update of the audio-visual channel is realized; the input and output priority of each interactive channel is evaluated Level assessment, to complete the multi-sensory collaborative interaction of learners in the VR learning environment. The present invention realizes the integrated display of the VR learning environment by adding auditory clues and multi-channel user interaction discrimination methods, which can enhance the sense of reality of the learning environment and improve the immersive experience of participants.

A method for recycling exhausted exchange resin during the recovering process of a silicon wafer wire cutting liquid belongs to the field of silicon wafer wire cutting, mainly comprises the following steps: 1) water washing, 2) acid soaking, 3) reagent mixture soaking, 4) oxidant soaking, and 5) water curing for standby application, and solves the problem that after being exhausted, rubber in the silicon wafer wire cutting liquid recovery industry is difficult to recover. Macromolecular organics in impurities are oxidized into micromolecular organics through the introduction of a strong oxidant, that is, NaClO, and under the high-speed mixing condition, the separation from resin is enabled to be relatively easy. Due to short contact time and reasonable temperature control, no damage on the body and exchange groups of the resin is caused. The method aims to obviously recover the ion exchange properties after ion exchanger resin is exhausted, which is caused by metal ions, soluble metal complexes, soluble silicide, organics and the like, and then is recovered. Through the experimental detection and the field practice, the properties of the recovered ion exchange resin are kept, and the exchange capacity reaches the new resin level basically.

The invention provides a BIM and 3D technology-based component design method and device, and a storage medium. The method comprises the steps of obtaining information of a structure through scanning to generate a point cloud model; processing the point cloud model to obtain scanning models of a primary structure and a secondary structure; establishing an FRP panel model according to the scanning model; and generating node indication information by combining the scanning model and the FRP panel model. Operation of all nodes can be efficiently, conveniently and clearly guided, efficient reference and guiding significance is achieved, and the problems that a pure two-dimensional line drawing in a traditional CAD-form decoration design two-dimensional drawing is not high in guidance, field practice does not conform to disclosure frequently in practical application, rework is prone to occurring, and waste is caused are solved.

The present invention relates to the field of agricultural technology, specifically an agricultural knowledge popularization education platform based on three-dimensional agriculture, including a device end, a network, a management center and a client, including a device end, a network, a management center and a client, through which the client can view Analyze the food received or eaten, use the planting sheds set up in the residential community to conduct popular science education, and push the growth video of the plants in the planting box and related knowledge of this plant according to the viewed plants, including foreign language pronunciation stories, sources and Fables, Tang poems and Song lyrics, animation songs, integrate plant diet and cultural and technological interests, let children fall in love with plants, and conduct agricultural knowledge education through video viewing, explanations and on-site practices, so that urban people, especially children, can understand crops and Relevant knowledge, carry out food education education.

The invention discloses a concrete gravity dam construction teaching model and a construction method thereof. The concrete gravity dam construction teaching model comprises non-overflow dam construction, overflow dam construction, hydraulic tunnel construction and grouting construction, wherein the overflow dam construction comprises overflow weir surface construction and overflow weir gate construction; the hydraulic tunnel construction comprises three stages of drilling and blasting construction, reinforcing mesh construction and concrete lining construction; and the grouting construction comprises dam foundation seepage-proof curtain grouting construction, tunnel backfilling grouting construction and dam joint grouting construction. According to the invention, site and manual practices of concrete gravity dam construction are combined so that the defects of field practices of off campus building sites are made up.

The invention discloses a self-adaptive distance protection method for a double-circuit line of an intelligent substation, belonging to the technical field of the power system automation. The method comprises the following steps of: 1) acquiring electrical quantity information; 2) performing the self-adaptation of a distance protection fixed value under special operating conditions; and 3) performing the self-adaptation of an impedance relay based on fault type recognition. The self-adaptive distance protection method is capable of effectively overcoming the influence of the zero-sequence mutual induction of the double-circuit line on distance protection, and simultaneously solving the problem of the sensitivity of the distance protection in case of a cross-line fault. Furthermore, the method is applied to field practice without increasing the fixed value or increasing secondary circuit connections and communication loads, and thereby has high practicable value.

The invention discloses a method for improving blasting tunneling footage by optimizing positions of cut holes and hollow holes, which comprises the following steps of: selecting a test site: selecting the test site as Dahongshan copper ore, selecting the diameters of the cut holes and the hollow holes, the cutting holes are divided into first blasting holes, second-section blasting holes and third-section blasting holes, the distance between the first blasting holes and the hollow holes is influenced by compensation space, explosive crushing range and charging hole deflection, hollow hole model design is carried out, the hollow holes are located in the center of the model, scheme design and simulation are carried out, and the hole distance between the hollow holes and the hollow holes is determined. A cut blasting hole arrangement scheme obtained through theoretical analysis and numerical simulation is applied to field practice, and errors of the cross-sectional area, width and height of a finally obtained cut cavity and a simulation result are all within 6%, which shows that it is feasible to determine blasting hole arrangement parameters through combination of theoretical calculation and numerical simulation.

The invention discloses a portable box for pincushion insect specimens and belongs to the technical field of field practice tools of entomology. Frameworks (1) of the portable box for the pincushion insect specimens consist of framework bodies (11), wherein framework holes (10) are formed in the framework bodies (11); the frameworks (1) are fixedly connected by using screws; support frames (3) are respectively arranged on the top surface and the bottom surface of the portable box for the pincushion insect specimens; a foam block (9) is arranged on specimen base cloth (4); tied ropes (7) are arranged at four corners of the specimen base cloth (4); a support frame hole (12) is arranged in the center of each specimen base cloth (4); the specimen base cloth (4) is arranged in the portable box for the pincushion insect specimens; and camphor bags (5) are positioned at four corners of the portable box for the pincushion insect specimens. The portable box disclosed by the invention is easy to dismount and mount and can be bundled after being dismounted for carrying, so that the space occupied for carrying is reduced and the deterioration of the specimens is avoided.

The invention provides a displacement pressure determination method and system for constant speed and constant pressure chemical flooding oil displacement experiments, wherein the method comprises the steps: obtaining a plurality of pressure data in a constant speed chemical flooding displacement stage, calculating a cumulative injection pressure value, selecting a plurality of average pressure values according to minimum pressure data and maximum pressure data, calculating to obtain a plurality of pressure holding times corresponding to the plurality of average pressure values, then carrying out a constant pressure displacement experiment, to obtain a plurality of corresponding cumulative injection amount data, combining with the plurality of average pressure values, and generating a curve; and according to the cumulative injection amount data obtained in a constant speed displacement experiment, combining with the curve, and calculating to obtain displacement pressure data. According to the displacement pressure determination method and system for the constant speed and constant pressure chemical flooding oil displacement experiments, through the constant speed and constant pressure experiments, the displacement pressure suitable for the constant pressure displacement experiment is obtained. Under the condition of a certain cumulative injection amount, the results of the constant speed and constant pressure experiments can be compared and transformed effectively, so as to play a guiding role in mine field practice.

The invention relates to a wharf pile foundation teaching model containing an inclined pile, belongs to the technical field of teaching models and is designed to solve the problem that a student doesnot have an intuitive understanding of pile foundation engineering in the teaching process, so that potential safety hazards exist in the field practice. The wharf pile foundation teaching model consists of foundation soil, a pile, a pile cap and a wharf superstructure; the foundation soil simulates a natural foundation form and sequentially consists of an artificial soil filling layer, a gray silt clay layer, a dark gray sub-clay layer and a gray-green clay layer from top to bottom; the pipe comprises a vertical pile and the inclined pile which are square piles; part of the pile is buried inthe foundation soil, and the other part is exposed out of the foundation soil; the pile cap combines the piles together to form a pile foundation; the wharf superstructure comprises a beam and a plateand is positioned at the upper part of the pile cap, and the plate is built on the beam for traffic; the pie and the wharf superstructure can be taken out from the foundation soil. The wharf pile foundation teaching model provided by the invention can better reflect the characteristics of a solid structure, is convenient for use in teaching and solves the safety problems in the field practice.