22 results about "Field experiment" patented technology

The invention discloses a safe blocking distance calculation and automatic blocking control method for a carbon dioxide transportation pipeline. The method comprises the steps that S1, the leakage rate is divided into four grades, and the wind speed of a mine working face roadway is calculated; s2, according to the leakage rate and the wind speed, the relation between the carbon dioxide diffusion concentration and the diffusion distance is obtained; s3, determining an expression of a pipeline safety cut-off distance L; s4, performing concentration constraint on the expression of the L, and calculating a pipeline safety cut-off distance; s5, performing field experiment verification; and S6, confirming the calculated safe cut-off distance L as the final cut-off distance, and triggering the automatic closing action of the pipeline cut-off valve in the L range corresponding to the leakage point. Through scientific and systematic quantitative analysis and accurate matching of leakage point positions and protection requirements, the relation between the set distance of the block valve and the leakage rate of the volume of carbon dioxide in the roadway after leakage is determined, the block valve is directly triggered to be automatically closed on the basis of the safety block distance L obtained through calculation, and delay of manual implementation is avoided.

This invention discloses a dynamically adjustable forest gap simulation device, belonging to the technical field of ecological experimental equipment. The device includes a supporting column, a supporting frame, a driving component, a shading component, and an intelligent control unit. The supporting column is a multi-stage telescopic structure equipped with a field anchoring mechanism. The supporting frame consists of a central connecting part and multiple radially telescopic and foldable radial arm-shaped components. The shading component is laid on the arm-shaped components to form a variable shading area. The driving component drives the arm-shaped components to extend and retract. The intelligent control unit uses off-grid photovoltaic power and can adaptively control the movement of the arm-shaped components according to preset strategies, light intensity, and wind speed parameters, realizing dynamic forest gap simulation and dynamic restoration of wind-disturbed light spots. This invention features high modularity, accurate simulation, stable structure, and suitability for long-term unattended field experiments, effectively solving the technical problems of traditional forest gap simulation devices, such as static fixation, poor dynamic effects, low intelligence level, and insufficient field adaptability.

The invention discloses a while-drilling seismic source energy and wave field measurement test device and a use method, and relates to the technical field of well drilling data experimental equipment.The while-drilling seismic source energy and wave field measurement test device comprises a supporting assembly, the supporting assembly comprises a shaft upper cover, a well mouth four-way joint and a shaft which are sequentially connected through flanges, and a well inner cavity is formed; the detection assembly comprises a rock sample box connected with the shaft and an impact force detector located below the rock sample box, a rock sample capable of sliding relative to the rock sample box is arranged in the rock sample box, a cushion block making contact with the rock sample is arranged at the bottom of the rock sample box, and the rock sample acts on the impact force detector through the cushion block. A plurality of ground wave detectors in contact with the rock sample are arranged in the rock sample box, the ground drilling assembly comprises a drill bit, the drill bit is used for impacting the rock sample, the problems that a lot of time needs to be spent on finding a proper well position and the cost is high when a field experiment is carried out in reality are solved, and by applying the device, the non-timeliness of the field experiment and the experiment cost are greatly reduced.

The application discloses a method for determining the surplus amount of phosphorus fertilizer application for regional wheat, and relates to the field of agricultural technology.The method comprises the following steps: obtaining the yield increment of phosphorus fertilizer for regional wheat according to field experiment data; constructing the regression relationship between the amount of applied phosphorus fertilizer and the yield increment; establishing the linear relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus; determining the data range of phosphorus nutrient imbalance based on the yield increment of phosphorus fertilizer for regional wheat, and then obtaining the range of the amount of applied phosphorus; determining the range value of the apparent balance amount of phosphorus according to the relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus in the step, which is the surplus amount of phosphorus application for regional wheat; and obtaining the surplus amount of phosphorus fertilizer application for regional wheat after data conversion.The method can guarantee the yield of wheat and maximize the saving use of phosphate rock resources, and provides a feasible measure for the intensive management of phosphorus fertilizer.

The invention provides a knowledge management system and method for thickened oil recovery, and the system comprises a knowledge base and a knowledge comprehensive management mechanism, and the knowledge base is used for receiving and storing multi-level knowledge data related to a thickened oil recovery process; the knowledge comprehensive management mechanism comprises a project management module, a research progress management module, a result library management module, a basic database management module, a mine field experiment library management module and an expert information library management module, realizes multi-level data knowledge management and flow control of a project, provides a research progress and result sharing platform, provides a basic data, expert information and experiment data storage library, and provides a data management platform; and a visual display service is provided. By adopting the scheme, the problems of knowledge storage fragmentation, non-uniform knowledge display modes and the like in the prior art are effectively solved, the method has the advantages of integration, knowledge, parameterization, automation, configurability, navigability and the like, the complexity of knowledge management is reduced, the research level of major special projects is improved, and the knowledge planning capability and the application capability of projects are improved.

The application relates to the technical field of particle deposition and semiconductor radiation resistance analysis, and discloses an alpha particle energy deposition calculation method based on a Monte Carlo particle transport simulation tool, which sequentially comprises material and particle source setting, use of an energy deposition scorer, statistics of single particle events, calculation of a soft error rate, and output and data analysis. By using the application, the need for field experiments is greatly reduced, and the time and cost required by experiments are saved. Moreover, by using a simulation method, a designer can more efficiently calculate the energy deposition of alpha particles in a semiconductor device and obtain the soft error rate of the alpha particles, and can perform radiation resistance reinforcement design of the semiconductor device according to the data, so that the radiation resistance performance and reliability of the device are improved.

The invention discloses a mechanism and deep learning fused machine tool precision out-of-tolerance fault diagnosis method, and belongs to the technical field of precision numerical control machine tool health management. Comprising the following steps: S10, constructing a tool nose nonlinear dynamic model of a nonlinear stiffness item K (x) considering thermal deformation influence; s20, the inherent frequency, damping and Taylor empirical formula coefficients of the whole machine are obtained in combination with the hammering excitation test and the cutting test; s30, the displacement change of a tool nose is obtained; s40, constructing an out-of-tolerance recognition library; and S50, calculating a precision index of the X (t) obtained under different working conditions, comparing the precision index with a threshold value to generate a qualified / out-of-tolerance label, and carrying out fault prediction based on a 1D-CNN-BiLSTM fusion network training classification model. And finally verifying the precision out-of-tolerance problem of the machining process in combination with field experimental data. The method can solve the problems that the traditional diagnosis technology is difficult to capture in real time, the precision is out-of-tolerance, and generalization is insufficient due to separation of a physical model and a data driving method.

This invention belongs to the field of microbial technology, specifically relating to a biocontrol bacterium Z9 for controlling sea buckthorn wilt and its application. The *Bacillus polymyxa* described in this invention can control sea buckthorn wilt, achieving an inhibition rate of over 60% against its pathogen, *Fusarium cladosporium*, and demonstrating a disease control effect exceeding 60%. Pot and field experiments have confirmed that *Bacillus polymyxa* Z9 can effectively inhibit the growth of the sea buckthorn wilt pathogen and enhance the biocontrol efficacy against the disease.

The invention belongs to the technical field of industrial pipeline flow field detection and simulation verification, and provides a method for measurement and multi-index evaluation of material suction uniformity of a bent pipe. Comprising the following steps that (1) a pipe bending model is manufactured, and the pipe bending size is recorded; (2) arranging a plurality of observation sections at specific positions in the bent pipe in the material flowing direction; (3) connecting the bent pipe to a fan system, generating a stable negative pressure environment, sucking materials, and measuring multi-point speed values on each observation section by using a high-precision anemograph; (4) establishing a corresponding three-dimensional model and performing CFD-DEM coupling simulation on the basis of the accurate size of the real bent pipe to obtain speed distribution data of each observation section; (5) calculating the average speed, the speed root-mean-square error and the speed uniformity index of each section based on the speed data obtained in the above step; (6) comparing the average speed, the speed root-mean-square error and the speed uniformity index of the field experiment test and the CFD-DEM coupling simulation, and comparing the speed distribution cloud atlas of the field experiment test and the CFD-DEM coupling simulation; the invention provides a set of standard method for evaluating the material suction uniformity of the bent pipe, the material suction uniformity of the bent pipe is evaluated through actual experimental test and CFD-DEM coupling simulation comparison and multi-index combination, the method is suitable for effect evaluation of bent pipes with different structures, a reliable tool is provided for optimization design of an industrial pipeline system, and the method is suitable for popularization and application. And the pain point that the industry depends on experience judgment is solved.

The utility model relates to the technical field of experimental devices, in particular to a portable heating and heat preservation device for a simulation agent pipe. The portable simulation agent pipe heating and heat preservation device comprises a shell, a display screen, a control key, a gas circuit slot, a heating and heat preservation assembly, a gas circuit fixing piece, a temperature control circuit board and a power module. The portable experiment table is high in portability, small in size, internally provided with a battery, capable of providing a stable heat source and air path ventilation, capable of avoiding local overheating, capable of reducing heat loss through an efficient heat insulation material and prolonging the endurance time of equipment, and suitable for being used in field experiments or mobile environments.

This invention discloses a method for synergistic optimization of soil structure and fertility based on straw return to the field to promote decomposition, belonging to the field of soil optimization technology. A systematic technical system is constructed from the dimensions of in-situ straw decomposition and compost humification enhancement. Highly efficient decomposition-promoting microorganisms and humification promoters are screened through indoor cultivation experiments. The regulatory mechanism of decomposition promoters on the compost humification process is analyzed using humification kinetic models and structural equation models, forming a compost humification enhancement technology. Key parameters affecting in-situ straw decomposition are screened using the nylon mesh bag method. Multiple physical, chemical, and biological indicators of the soil are measured through years of field experiments. A comprehensive scoring model is constructed using principal component analysis, combined with multi-factor variance analysis and multiple comparisons, to screen the treatment combination with the highest contribution rate to the synergistic improvement of soil structure and fertility. Technical procedures are formulated and demonstrated. This achieves synergistic fertilization of the topsoil and sub-topsoil of degraded soils, with significant economic, ecological, and social benefits.

This invention belongs to the field of power grid system technology, specifically a method for determining the impact of regional environmental erosion on the lifespan of power grid transmission and distribution facilities. The method includes the following steps: S1: A comprehensive corrosion environment analysis considering the superposition of acid rain, high humidity atmospheric environment, and marine climate environment. This invention is based on multi-dimensional data analysis, including publicly available literature, field experimental data, asset history, scrapping certificates, and statistical data on the geographical and natural environment of the target area. It scientifically calculates and analyzes the lifespan of power transmission and distribution fixed assets, using the actual technical lifespan of power grid equipment as a basis for reference, supplemented by economic life calculations and statistical distribution of actual scrapping years as evidence. Finally, it provides recommendations for the depreciation period of power grid fixed assets in the target area by voltage level and equipment type. This method can accurately determine the depreciation period of power grid facilities in the target area after environmental impact, facilitating safe maintenance of the power grid.

This invention relates to the field of ecological restoration, and discloses a method and system for soil health restoration and nutrient cycling regulation of degraded *Allium chinense* populations in karst alpine regions. The method includes the following steps: performing structured initial sampling in the target restoration area to obtain an initial training dataset; constructing a master surrogate model for predicting *Allium chinense* population density and a constrained surrogate model for predicting the feasibility of restoration schemes; optimizing the master surrogate model using a sampling function to select candidate restoration formulas; implementing the candidate restoration formulas in the field and observing the actual population density response, incorporating the new data pairs into the initial training dataset to update the master surrogate model; using the constrained surrogate model combined with a feasibility constraint function to evaluate the economic feasibility of the candidate restoration formulas under given competing plant conditions; integrating the new data to retrain the master surrogate model and / or the constrained surrogate model and updating the recommended restoration formulas. This method provides quantitative support for restoration decisions while reducing the number of field experiment rounds.

The application discloses a method for determining the surplus amount of phosphorus fertilizer application for regional rice, and relates to the technical field of agriculture. The method comprises the following steps: obtaining the yield increment of phosphorus fertilizer for regional rice according to field experiment data; constructing a regression relationship between the amount of applied phosphorus and the yield increment; establishing a linear relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus; determining the data range of phosphorus nutrient imbalance based on the yield increment of phosphorus fertilizer for regional rice, and then obtaining the range of the amount of applied phosphorus; determining the range value of the apparent balance amount of phosphorus according to the relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus in the step, and the range value is the surplus amount of phosphorus application for regional rice; and obtaining the surplus amount of phosphorus fertilizer application for regional rice after data conversion. The application can guarantee the yield of rice and maximize the saving use of phosphate rock resources, and provides a feasible measure for the intensive management of phosphorus fertilizer.

The invention discloses a construction method of a rolling compaction model for coarse aggregate compaction, the rolling compaction model is constructed through a process of prototype replication, refined adjustment and parameter calibration, the rolling compaction model is compared with a field experiment, the simulation effect of the constructed rolling compaction model is verified, and the rolling compaction model is used for researching the compaction process of gravel materials under pressure. According to the method, a PFC numerical rolling model is built based on a typical sand-gravel material rolling test in reality, mesoscopic parameters are adjusted through system comparison, parameter calibration is carried out, the rolling model giving consideration to both calculation precision and calculation efficiency is built, numerical simulation is converted from qualitative analysis to quantitative analysis, and the calculation efficiency is improved. Defects caused by field condition limitation can be effectively made up, and the device can be applied to further research on the vibration rolling characteristics of the sand-gravel materials.

The invention relates to a multifunctional heat preservation box for simulating a soft rock shear rheological experiment shear box based on five-field coupling. The invention relates to the technical field of rock mechanics tests, in particular to a multifunctional heat preservation box applied to a THMC-B multi-field coupling shear rheological experimental instrument, which comprises a heat preservation box front part, and an internal electronic temperature display meter and heat preservation glass are mounted on the heat preservation box front part; the thermal insulation box rear part is fixed on the experimental instrument through a vertical steel column and a lateral steel column, a seepage field / chemical field water inlet and a seepage field / chemical field water outlet are formed in the rear part of the thermal insulation box rear part, holes for a horizontal static load electric cylinder, a horizontal dynamic load electric cylinder and a normal dynamic load electric cylinder are reserved in the whole thermal insulation box, and thermal insulation felt cloth is mounted at the openings. The device has the advantages that the device is easy to install and convenient to use, the heat preservation efficiency needed in a temperature field experiment is effectively improved, meanwhile, the temperature of the internal shear box can be detected in real time, and temperature measurement in the experiment is facilitated. Besides, compared with a traditional heat preservation box, the heat preservation box is designed through a novel composite multi-layer material, temperature dissipation and heat exchange of the heat preservation box are greatly reduced, and the heat preservation box has the advantage of being beneficial to popularization and test.

The invention relates to the technical field of oil spill monitoring, in particular to a multiband spectral index method suitable for detecting oil spill under different observation distances, which comprises the following steps: calculating oil spill spectral indexes in an external field experiment and a remote sensing image; extracting an index value of an oil spill area and an index value of a seawater area from each oil spill spectral index, constructing an oil spill sample group based on the index value of the oil spill area, and constructing a seawater sample group based on the index value of the seawater area; performing single-factor variance analysis on the oil spill sample group and the seawater sample group, calculating a p value of each oil spill spectral index, and retaining the oil spill spectral index with the p value less than 0.05; generating a box graph based on index values of oil spilling and seawater areas in the reserved oil spilling spectral index, and generating a classification threshold based on the box graph; and classifying the spectral index values of all pixels in the remote sensing image by using the classification threshold to obtain classification results of the oil spill area and the seawater area. According to the invention, oil spill accidents can be mastered more comprehensively.

The application provides a kind of driving factor influence identification method for natural vegetation soil respiration and component, belong to environmental science and technology field.The method includes: through literature research, extract relevant data, obtain response variable, and carry out hierarchical classification to driving factor and climate condition, the data that cannot be obtained from literature is supplemented by field experiment data, quantifies the overall influence size of different levels of driving factor on response variable and soil respiration and component index under different climate vegetation conditions;Calculate the contribution size of climate vegetation condition to soil respiration and component change under the action of driving factor;Test the correlation and importance between each response variable;Analyze the multi-factor influence of typical climate driving factor and vegetation condition on soil respiration and component.The application clarifies the influence mechanism of natural driving factor on soil carbon release process under different climate conditions, and can provide key parameters for further carbon cycle simulation.

The invention discloses a portable size-variable runoff plot for field experiments, which comprises two telescopic coamings, a top coaming and a bottom coaming are detachably connected between the two telescopic coamings, and the bottom coaming is communicated with a drain pipe; the collecting assembly comprises a collecting barrel, the collecting barrel is detachably connected with an upper cover and a bottom sealing part, the upper cover is communicated with the drainage pipe through a hose, the bottom sealing part is communicated with a plurality of drainage mechanisms and fixedly connected to a support, a driving mechanism is arranged at the bottom of the support, and the driving mechanism is detachably connected with a plurality of bent stirring rods; the breaking assembly comprises a separator and a cutter, the separator is used for separating the interior of the collecting barrel into a plurality of equal spaces, and the cutter is used for cutting the bottom sealing part. According to the device, the area of a runoff plot can be adjusted, a sample can be more uniformly divided into a plurality of parts, and sampling is more convenient.

The invention provides a sampling auxiliary device for field test soil gas monitoring. A base is locally buried in soil; the bottom of the sampling barrel is connected with the base to define a sealed sampling cavity for collecting gas in soil, and the sampling cavity is connected with external sampling equipment; the sampling barrel comprises a plurality of transparent sampling sub-barrels which are detachably connected, a heat insulation cavity is formed in the side wall of each sampling sub-barrel, a shading cavity is formed in the outer side of each heat insulation cavity, a blocking mechanism is arranged in each shading cavity, a lightproof liquid shading medium is arranged in the storage box, and the storage box is connected with the shading cavities through a pump machine. By arranging the sampling sub-cylinders with the heat insulation cavities and the shading cavities and the storage box and the pump connected with the shading cavities, automatic control over shading and heat insulation of the sampling cavities is achieved, the sampling sub-cylinders are of a plurality of detachably-connected structures, the appropriate number of sampling sub-cylinders can be selected according to the sizes of plants to be assembled, and the sampling efficiency is improved. Therefore, the volume of the sampling cavity is adjusted, and the accuracy of gas sampling is ensured.

The application discloses a method for determining the surplus amount of phosphorus fertilizer application for regional corn, and relates to the technical field of agriculture. The method comprises the following steps: obtaining the yield increment of phosphorus fertilizer for regional corn according to field experiment data; constructing the regression relationship between the amount of applied phosphorus and the yield increment; establishing the linear relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus; determining the data range of phosphorus nutrient imbalance based on the yield increment of phosphorus fertilizer for regional corn, and then obtaining the range of the amount of applied phosphorus; determining the range value of the apparent balance amount of phosphorus according to the relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus in the step, which is the surplus amount of phosphorus application for regional corn; and obtaining the surplus amount of phosphorus fertilizer application for regional corn after data conversion. The application can guarantee the yield of corn and achieve the maximum saving of phosphorus ore resources, and provides a feasible measure for the intensive management of phosphorus fertilizer.

The invention belongs to the technical field of greenhouse crop water and fertilizer management and green efficient sustainable production, and particularly relates to a greenhouse tomato yield and quality grading evaluation water and fertilizer management method, which is characterized by sequentially comprising the steps of data collection, weight determination, sorting, grading and optimal mode determination, weight determination adopts an integrated entropy weight method, sorting adopts a TOPSIS model, and the optimal mode determination adopts a TOPSIS model. And an AISM model is adopted in a grading manner, and finally an EWM-TOPSIS-AISM comprehensive evaluation model is constructed. The method has the advantages that an EWM-TOPSIS-AISM comprehensive evaluation model is constructed on the basis of field experiments, water and nitrogen management of greenhouse drip irrigation tomatoes in the northeast region is optimized on the basis of multiple targets, an optimal water and nitrogen supply mode is established, and a theoretical basis and technical support are provided for formulating a precise drip irrigation and fertilization strategy for greenhouse tomatoes in the northeast region; (2) the EWM-TOPSIS-AISM comprehensive evaluation model has the advantage that the problems of subjectivity and inconsistent results of a single model are effectively solved through a combined evaluation method, and (3) the evaluation result is stable and reliable through bidirectional verification of UP type and DOWN type topological hierarchy directed graphs.