509 results about "Field experiment" patented technology

The invention discloses a multi-user immersive full-interactive virtual reality engineering training system, and belongs to a virtual reality engineering training system. A participant of the training system is endowed with a specific role of the virtual system; the participant is interacting with a virtual scene through a man-machine interactive device; each extension set is connected with a host computer through the network, and the communication between the host computer and the extension set is realized; and a host computer operator monitors, evaluates and guides the virtual scenes and roles through a host computer display device and the man-machine interactive device. A virtual reality technology applied to the engineering training is realized; the training system is applied to the man-machine interaction and provided with the characteristics of experience, sense of immersion and sense of participation; by the combination of online operation, cooperation of types of works and virtual production scenes, the problems of difficulty in implementation, high cost and dangers existing in field experimentation, practical teaching and security training of the engineering fields are well solved; the training system has the advantages that the time-space limitation is broken through by using the virtual reality technology; the study and participation interest of the participant is improved; and in addition, the training system can be updated and perfected in real time with the development of science and technology and with the scene changes.

The experiment platform includes experimental solid model of underground in 1:5 large scale, fire source system, ventilation and smoke extraction system, fire detection alarm system, experimental measurement and collection system, and data analytic system. Structure of multistory building of the solid model includes interzone tunnels, platforms, station halls and facility rooms etc. Modularized design is adopted. Fire source system can simulate different scenes of fire, and generate hot smoke gas of fire nigh true. Power and fuming quantity of the fire source system is determined based on theoretical analysis from model similitude. The experiment platform can generate growth curve of different power of fire. The experiment platform is in use for carrying out experimental studies: happening and growing mechanism of fire, and poison gas outspread inside stations of underground as well as control technique. The invention is applicable to different structures of station.

The invention provides a modeling method for a generator excited system which comprises the following steps: (1) obtaining the idle load characteristic of the generator, the idle load and the load characteristics of an exciting dynamo, the time constants of the generator and the exciting dynamo, the phase position and frequency characteristic of the generator excited system and the damping effects of low frequency oscillation by experiments; (2) building a field system model; (3) analyzing the obtained basic data to obtain normalized model parameters, building an original simulation model in a Matlab emulator to carry out step response simulation and carrying out corresponding corrections of the parameters in the model according to simulation calculation and field experiment errors until the errors meet the requirements; (4) transforming the parameters into practically useful model parameters in a power system analyzing program and carrying out further correction of the model parameters in the program according to the specific characteristics of the original model. The model parameters of the field system obtained by the invention have the advantage of enough precision, which can really reflect the performance indexes of the field system.

The invention belongs to the technical field of plant root system detection, and provides an automatic plant root system monitoring system. Under the premise of not injuring the original plants, the growing states of root systems can directly viewed through organic glass soil columns, a plant root system monitoring subsystem acquires the soil moisture, temperatures and plant evaporation capabilities of a variety of plant root systems and data and images as plant root system growth parameters in real time, dynamically and in all weathers, a plant root system and leaf analysis subsystem carries out analysis on the plant root system images and the leaf images, and investigates the relation between the growth of the leaves and the growth of the root systems, and the moisture, nutrient, temperature and microbial indexes of rhizosphere soil can be monitored and sampled by observing openable small windows on the organic glass soil columns, so that the determination and analysis of various physiological and biochemical indexes and a root-cutting experiment can be carried out. The automatic plant root system monitoring system reduces errors produced by a single large field experiment, provides powerful data sources for more in-depth researches, and has the advantages of little risk, easy maintenance, wide application range and high operability.

The invention discloses a portable field multi-parameter measuring device. The portable field multi-parameter measuring device is used for measuring soil compactness, soil temperature, soil moisture,a distance, a weight and an inclination angle. Problems that an existing field soil measuring device has a single function and low measurement efficiency are solved. The device comprises a measuring host machine, a connecting rod, an exploration rod and a weighing hook. The measuring host machine comprises a position-convertible handle, a bubble level, a tension and pressure sensor, an inclinationangle sensor, a laser distance measuring module, a Bluetooth data transmission module, a satellite positioning module, a liquid crystal display screen and a measuring circuit board. Annular metal electrodes are arranged on the exploration rod at intervals. The portable field multi-parameter measuring device can be used for realizing multi-parameter measurement when being used for a field experiment, has high efficiency and a simple structure, is energy-saving and environmentally friendly and meets the demand of agricultural production and scientific research.

The invention relates to an antibiotic streptomyces, fermentation product of which can inhibit broad spectrum fungus and protozoan, and field experiment can control crop fungus plant disease and root-knot nematode. The antibiotic streptomyces has good effect, no pollution nuisance and no residue. The antifungal agent has extremely low hazardness for the people and good performance and development prospect for medical and agricultural use. The invention is named as SIM001 antibiotic streptomyces which is Streptomyces antibioticus subspecies xi an, and is preserved as patent in the depositary institution appointed by patent office of state intellectual property office; the preservation data is April 14th, 2005, the name of the depositary institution is CGMCC, and the number of preservation is CGMCC No.1349. The whole cell hydrolysate of the antibiotic streptomyces contains L, L-DAP (Diaminopimelic acid) and no characteristic glucide; the cytoderm belongs to I type and glucide type C; one of the main antibacterial materials is polyene macrocyclic ketolide which belongs to the broad spectrum antifungal substance.

The invention discloses an electro-osmosis consolidation shearing device. The electro-osmosis consolidation shearing device comprises a frame, a vertical loading system, a horizontal shearing loading system and an electric insulation experiment box, wherein the frame comprises a bottom frame and a portal frame; the bottom frame is fixedly connected with the portal frame; the vertical loading system is fixedly connected to the upper wall of the portal frame, and comprises a shaft pressure air cylinder, a shaft pressure displacement electronic sensor and a shaft force sensor; the electric insulation experiment box comprises electrode tubes, an upper shearing box and a lower shearing box; during an electro-osmosis experiment, soil is placed in the upper shearing box and the lower shearing box, and the electrode tubes are inserted into the soil. The electro-osmosis consolidation shearing device is high in experiment efficiency, small in occupation area, convenient to operate, compact in structure, accurate and reliable in determination result, and applicable to an indoor or field experiment for the electro-osmosis test on soft clay and mucky soil in eastern coastal regions and the Pearl River Delta region, and serves for solving the related engineering problems of foundation deformation and stability parameter determination in geotechnical engineering problems of foundation treatment, coastal reclamation, port revetment and the like.

The invention discloses a method for evaluating performance of heterogeneous SAR (synthetic aperture radar) image feature matching algorithms. The method comprises the following steps of 1) preparing an edge feature reference map based on the ROC classification decision criterion; 2) performing quantitative evaluation based on edge similarity measurement; 3) performing selection and optimization on SAR image evaluation indicators; and 4) performing qualitative evaluation based on an SVM evaluation model. The invention helps to shorten a development cycle of image matching of precision-guided weapon systems, reduce a period and times of outfield field experiment flights, realize automatic selection and optimization of the matching algorithms, and at the same time save many field experiment funds, human resources and material resources.

The invention provides a bridge damage detection method. Through field experiments, the bridge bottom testing point flexibility response due to bridge passing by a vehicle can be obtained through test; then, the vehicle axle information is combined; a multi-section function model is introduced; a flexibility influence line (the influence line includes relevant information of the bridge damage) ofthe test point through mathematical inversion; on the basis of the test point position, the base function-non-damaged base function capable of reflecting non-damaged state is built; the damage index is built by combining the flexibility influence line and the non-damaged base function; the damage positioning can be performed through the damage index curve local peak value point. The base functioncapable of describing the damage degree is built according to the recognized damage position information, and is called as the damage base function; the bridge practical flexibility influence line andthe non-damaged base function and the damage base function are built in a combined way; through the least square fitting collation, the effective recognition on the damage degree is realized. The problem of non-damaged state information requirement of the exiting bridge damage detection method is solved. The test is simple; the test data information quantity is great; high practical significanceand values are realized.

The invention relates to an efficient and environment-friendly remains preservative free of formaldehyde and application thereof. The remains preservative mainly comprises, by volume, 0.5-10% of phenoxyethanol, 0.2-1.5% of isothiazolinone, 3-15% of organic acid, 5-20% of propylene glycol, 5-30% of glycerol, 20-75% of ethanol and 5-35% of distilled water, and, by weight, 1-10% of hexamethylenetetramine and 0-2% of ethylenediamine tetraacetic acid disodium salt. The preservative can be poured through an aorta and an aortic arch and injected through the abdominal cavity, the thoracic cavity, the pharyngeal cavity and the cranial cavity so as to carry out antiseptic preservation, disinfection and smell removal to remains. Quantification sterilization experiments, animal experiments and funeral home field experiments prove that the remains preservative is efficient in antibacterial property, quick in action speed, low in toxicity and suitable for short-term or long-term remains antisepsis or specimen preservation of funeral homes and medical colleges at home and abroad.

The invention discloses novel application of biopesticide tetramycin generated by Streptomyces ahygroscopicus subsp.Wuzhouensis n.subsp in preventing and controlling Magnaporthe grisea. The tetramycin is compound agricultural antibiotic, comprises tetramycin A1 and A2, albonoursin and flagecidin, and has a rate of preventing and controlling the apple canker of over 95 percent. Indoor and field experiments prove that tetramycin diluent (the ratio of the tetramycin to water is 1: 999) has better effect of preventing and controlling the Magnaporthe grisea than 4 percent kasugamicin waterable powder, 75 percent tricyclazole waterable powder and 25 percent prochloraz missible oil, and has administration lower than positive control remarkably. The tetramycin used can reduce agricultural production cost, improves prevention effect, can be alternately used with other biopesticides, reduces the generation of resistance, has good effect of preventing and controlling the Magnaporthe grisea, and no problems such as environmental pollution, pesticide residue and the like, belongs to the environment-friendly biopesticide, and has good development and application prospects.

The invention relates to a method for judging and screening low-accumulation plants containing toxic and harmful substances (including substances with health risks, such as heavy meals, organic pollutants, and the like), in particular to a standard for judging the ultralow-accumulation plants and a method for screening the low-accumulation plants. The method is mainly characterized by providing the standard for judging the ultralow-accumulation plants for the first time and developing the method for screening the low-accumulation plants on the basis of the standard. The method usually takes crops as screening objects and also comprises the screening of other plant species with potential utilization values; in the method, crop species for implementing the safety production of farm products under the condition of polluted soil environment are screened as major objects by taking a potting soil culture experiment as a guide and combining a field experiment as a verification; and the method also comprises the screening of other plant species with potential utilization value.

The invention discloses a method for soil testing and formulated fertilization. According to the method for soil testing and formulated fertilization, soil testing and fertilization field experiment are taken as the base, and the fertilization amount, the fertilization time and the fertilization method of fertilizer such as nitrogen, phosphorus, potassium and medium trace elements can be proposedaccording to the fertilizer requirement law of crops, fertilizer supply performance of soil and fertilizer effect and on the basis of reasonable application of organic fertilizer. The method for soiltesting and formulated fertilization solves the mediates and solves the contradiction of fertilizer requirement of crops and fertilizer supply of soil; meanwhile, nutrient element required by crops can be supplemented in a directed manner, and a proper amount of elements that crops requires can be supplemented, so that all nutrients are supplied in a balanced manner, the requirements of crops canbe met, and the purposes of improving utilization rate of fertilizer, decreasing the consumption of fertilizer, improving the quality of agricultural products, saving labor and cost and increasing income can be achieved; through soil testing and formulated fertilization, the fertilization amount and the proportion of all the nutrient elements can be ensured reasonably, so that the utilization rateof fertilization can be improved effectively.

The invention discloses a decision support system for cropland management and fertilization, belonging to the technical field of agricultural information. The system of the invention manages the regional cropland quantity, the farmland production condition and the soil nutrient condition on a visual map, and provides scientific fertilization guidance for farmers. By means of the invention, the problems of reduction of cropland quality, unbalanced fertilizer utilization, unscientific cropland utilizing and nourishing management and unscientific management on crop growth processes are solved. The invention can ensure that cropland management and fertilization guidance of croplands aiming at any county is finished. By providing the results acquired by perennial field experiments and the knowledge of experts for farmers, the invention has the advantages that scientific fertilization is realized according to different climate and cultivation conditions as well as cropland soil fertility conditions, and decision makers can carry out visual management on farmland conditions. The invention constructs a technical support platform for ensuring national food security, and has practical significance.

The invention discloses a stable isotopic abundance ratio real-time online monitoring device and a stable isotopic abundance ratio real-time online monitoring method. A wavelength scanning off-axis integrated cavity spectrum technology is utilized for performing precision measurement on isotopic abundance ratio of an object element, and the device comprises a laser device, a laser controller, a signal generator, an angle adjustable prism, a wavemeter, an off-axis integrated cavity, a temperature and pressure controller, a piezoelectric ceramic controller, an off-axis parabolic mirror, a photoelectric detector, a lock-in amplifier and a signal processing system for acquiring A/D (analog/digital) and terminal signals. The method disclosed by the invention is performed on the basis of the off-axis integrated cavity laser absorption spectrum technology and is further combined with wavelength scanning, cavity regulation, temperature, pressure and wavelength precision control technology, so that the stable isotopic abundance ratio real-time online monitoring can be realized, and trace gas concentration and isotopic abundance ratio measurement can be simultaneously performed; furthermore, the preparation of a sample is not required, so that the measurement frequency is greatly improved; and the device has the advantages of simplicity in operation, no need of calibration, almost no drift during a long period of time, good stability, low power, convenience in carrying, mounting and field experiments and large dynamic range.

The invention relates to bacillus megaterium, a polypeptide agricultural microbial agent thereof as well as a preparation method thereof and applicationof the polypeptide agricultural microbial agent.The bacillus megaterium takes distillers' grains, soya bean meal and straw powder, which are rich in protein content, as main raw materials, and are mixed with corn flour, wheat bran, inorganic saltsand a few carbon source to reasonably compound and steam; high-yield protease bacillus subtilis is firstly utilized, the bacillus megaterium is utilized for decomposing different proteins in raw materials under a special fermentation condition to prepare the agricultural microbial agent which takes active peptides, amino acid, polysaccharides and the like as efficient ingredients; the microbial agent contains a great number of living spores, 17 free amino acids, a plurality of active peptides, and polysaccharides, and nutrient content is rich, the activity of thallus is high, and shelf life reaches two years or more; and according to the field experiment, the good effects of improving quality and increasing the yield are achieved.

The invention belongs to the technical field of plant cultivation and relates to a controlled release nitrogen-containing controlled release fertilizer special for sugarcane. The controlled release fertilizer is prepared through even mixing of reaction film-forming polymer coated urea with a 180-day release period, reaction film-forming polymer coated urea with a 120-day release period, reaction film-forming polymer coated urea with a 60-day release period, urea, a phosphate fertilizer, a potash fertilizer, zinc sulfate and magnesium sulfate. According to the controlled release fertilizer, single controlled release fertilizers with different release periods and part of quick-acting fertilizers are compounded according to nutrient absorption laws of the sugarcane, the fertilizer efficiency is long, nutrient release accords with absorption requirements of the sugarcane, the nutrient requirement of the sugarcane in the growing period is satisfied through fertilization once, the foundation is laid for high yield of the sugarcane, and a good effect is achieved through field experiments.

The invention provides a tight sandstone gas reservoir development well pattern optimization method and belongs to the technical field of effective maximum natural gas extraction and geological and gas reservoir engineering and mineral field experiments. The method comprises the following steps: collecting drilling data in a dense area, finely dissecting an effective sand body and determining the length and width of the effective sand body; establishing a no-interference gas well change rule on the basis that the collection production time is long and the fact that well interference does not exist in actual production data of a gas well is proved; determining that a gas-well production interference change rule exists by adopting a numerical simulation technique and on the basis of establishment of a fine geological model; realizing production forecast of two types of gas wells, and establishing a development well pattern optimization model by using gas reservoir development profits as a reference, so as to determine economic limit well pattern density and economic optimum well pattern density of a gas reservoir; establishing a relationship between a gas reservoir recovery ratio and the well pattern density; and determining a reasonable development well pattern for the gas reservoir by comprehensively considering geological requirements, economic conditions and highest recovery ratio expectation, so as to realize optimization of the tight sandstone gas reservoir development well pattern.

The invention provides an under-hole in-situ three-dimensional static load-vertical side friction force testing device for a rock and earth mass. The device comprises a lateral experiment part, a vertical experiment part and a testing unit, wherein the lateral experiment part comprises a fixed pipe fixed to the axis of a rack, multiple arc-shaped counter-force plates which can be radially and movably installed on the circumference of the fixed pipe, a radial power device for driving the counter-force plates to perform radial movement, a sliding device fixed to the fixed pipe to install the radial power device and a sliding power device driving the radial power device to move on the sliding device. The vertical experiment part comprises a vertical power device and a vertical static load device exerting pressure to the bottom of a hole. The testing unit obtains measurement data of the lateral experiment part and the vertical experiment part through measurement elements and transmits the data to a data mainframe located on the ground. The under-hole in-situ three-dimensional static load-vertical side friction force testing device can perform experiments under holes under the conditions of any depth, various rock and earth masses and various water contents and obtain various strength indexes of the rock and earth masses and fully meets the index requirements of field experiments.

The invention discloses a high-quality, high-yield and water-saving planting method for sweet potatoes, belonging to the technical field of agricultural production. According to the method, the aspects of variety selection, soil preparation, ridging, optimum-period early planting, laminating condensed planting, mulched drip irrigation, field management, pest control and prevention, mechanized harvesting and the like of the sweet potatoes are comprehensively considered, and the 'one-control and two-reduction' high-quality, high-yield and water-saving planting method for the sweet potatoes is provided. Field experiments prove that compared with a traditional method, the method disclosed by the invention has the advantages that the utilization rate of the water resource is substantially increased, the soil space is adequately utilized, the commodity and yield of the sweet potatoes are remarkably increased, the growth and development of the sweet potatoes are greatly facilitated, and effects of saving the cost and increasing the efficiency are achieved. By virtue of the method, a novel effective technical measure is provided for the planting of the sweet potatoes, and meanwhile, the foundation is laid for the standardization, large-scale production and modernization of sweet potato planting techniques.

The invention relates to the technical field of reliability testing, and more specifically relates to a reliability qualification test method combining internal and external fields applicable to electromechanical products. An electromechanical product is divided into a mechanical part, an actuator and a control system, the mechanical part, the actuator and the control system are checked by using atest method in which an external field experiment is combined with an internal field experiment, a reliability qualification test method combining internal and external fields is provided, the large-size electromechanical equipment is divided into the mechanical part, the actuator and the control system in the method, events experienced in a working period are simulated according to a service life section and a task section of a tested product, working stress is formulated to assess the reliability of the mechanical part, combined stress of humidity, humidity and vibration is applied to the control system that is insufficiently evaluated in the external field experiment according to GJB1989A-2009, and a laboratory test manner is further supplemented and implemented to perform a supplementary test on the environmental stress thereof, so that the adequacy of the test and the integrity of the test data are ensured.

The invention discloses a sampling method for non-damage fixed position observation of plant stomata in a field experiment, which comprises the following steps of: according to experimental design, selecting functional leaves, avoiding overripe leaves, over tender leaves, leaves damaged by diseases and insects and malformed leaves, and cleaning object leaves; evenly coating a thin layer of nail polish at a position to be observed, and natural drying or blowing to be nearly dry by using a washing ear ball; flatly and tightly pasting a transparent adhesive tape on a clean glass slide, using a dissecting needle or a clean blade for slowly guiding to prevent air bubbles, and tightly pasting the adhesive tape with the width being at least 2mm around the nail polish on the glass slide; and numbering, clean packaging, and taking back to the laboratory for microscopic observation and measurement. The method has the advantages of being capable of bulk sampling in field living leaves, having no damage to the leaves, fixed position recording stomatal conditions, observing daily change of the stomata of the leaves under different processing conditions, and the like, and can be used for the research and practice in the fields such as bioecology, plant physiology, plant germplasm resource, plant thremmatology, cultivation science, etc.