66 results about "Water deficit" patented technology

The present invention provides nucleic acid constructs, including plasmids, expression vectors or expression cassettes comprising polynucleotides encoding CCAAT-binding transcription factor polypeptides that have the ability to increase a plant's tolerance to abiotic stress. Polynucleotides encoding functional CCAAT-binding transcription factors were incorporated into expression vectors, introduced into plants, and ectopically expressed. The encoded polypeptides of the invention significantly increased the cold and water deficit tolerance of the transgenic plants, as compared to tolerance to these stresses of control plants.

The present invention provides methods for growing plants to result in increased concentrations of one or more glucosinolates. The plant may be a member of the order Capparales, such as a Brassicaceae, a Capparaceae, or a cultivar thereof. The methods include exposing a plant to an altered radiation condition, a water deficit condition, an altered growth temperature, an altered level of sulfur and/or nitrogen, or a combination thereof.

A system that based on changes in agricultural crop or plant characteristics or dynamics, e.g., heat stress, water deficit stress, stem growth, leaf thickness, plant turgidity, plant color, nutrient composition, etc., or changes in environmental conditions, e.g., temperature, wind, pressure, relative humidity, dew point, precipitation, soil moisture, solar radiation, etc. or a combination of both, e.g., evapotranspiration, either automatically increases or decreases the speed or rate of movement or rotation of a mechanized irrigation system, e.g., center pivot, corner, linear, or lateral move irrigation system or similar, or reports a recommended increased or decreased speed or rate of movement or rotation of a mechanized irrigation system either directly or indirectly to the end user. The system responds directly or indirectly to data outputted from monitoring systems that gather and compile environmental (non-biotic), biotic or similar information from agricultural fields and crops.

The invention discloses and proposes a reservoir dispatching method based on multi-target shuffled frog leaping and differential algorithms. The reservoir dispatching method comprises the following steps of S11, acquiring basic information data of a reservoir; S12, building a multi-target optimal dispatching mathematic model considering constraint conditions of water balance, machine set output, discharged volume and generation power, wherein the target function is built based on maximum generation power, minimum water deficit, minimum surplus water and minimum output; S13, figuring out Pareto optimal solution of the multi-target optimal dispatching mathematic model by using the multi-target shuffled frog leaping and differential algorithms; and S14, automatically determining a reservoir optimal dispatching scheme by a multi-target decision method on the basis of the Pareto optimal solution. By the reservoir dispatching method, global optimization is achieved, the calculation efficiency is improved, and the requirement of automatically selecting the multi-target optimal dispatching scheme of the reservoir is met.

The invention relates to plant transcription factor polypeptides, polynucleotides that encode them, homologs from a variety of plant species, and methods of using the polynucleotides and polypeptides to produce transgenic plants having advantageous properties, tolerance low nitrogen, cold and water deficit conditions, and resistance to disease, as compared to wild-type or other control plants.

The invention discloses a data assimilation method for monitoring soil moisture. The method provided by the invention at least comprises an assimilation cycle, and each assimilation cycle comprises the following steps: (1) an ecological process model serves as a dynamic model to stimulate the space distribution state of soil moisture every day, the initial value in the dynamic model is an initial parameter and an initial soil moisture data, and the dynamic model is operated to output simulative soil moisture data; remotely sensed data on the soil surface is performed with inversion to obtain surface layer soil moisture data; the simulative soil moisture data in the remotely sensed data corresponding date is combined with the surface layer soil moisture data obtained by remotely sensed data inversion for data assimilation so as to obtain an optimized ecological process model parameter; (2) the optimized parameter is substituted into the dynamic model in step (1) to operate the dynamic model so as to obtain simulative soil moisture data every day. The method provided by the invention can connect soil moisture variety with vegetable physiological response mechanism by water deficit and stress, which improves the precision of field soil moisture monitoring and drought evaluation and has important application prospect.

A gas diffusion layer, a manufacturing apparatus and a manufacturing method thereof are provided. The gas diffusion layer having different hydrophilic/hydrophobic structure and channel therein can be manufactured quickly and easily by using a coating mask. The gas diffusion layer is used in various fuel cells to enhance the ability of water management and to solve the problem of flooding at the cathode, the problem of water deficit at the anode, and the problem of gas transfer. The gas diffusion layer includes a gas diffusion medium having a first property and a micro porous layer having a second property. The micro porous layer is formed on one surface of the gas diffusion medium. The micro porous layer has a plurality of channel layers penetrating the gas diffusion medium. One of the first property and the second property is hydrophilic, and the other is hydrophobic.

The invention discloses a drought evaluation method for coupling a distributed hydrological model and combining water deficit indexes. The method aims to overcome defects of a physical mechanism and the defect that time and space comparability is weak in Palmer drought indexes, and carry out standardization on the Palmer drought indexes. By means of a Capra function, a multivariate combined distribution is achieved, a multivariable combined water deficit index fusing multi-time scale information is built to serve as a comprehensive index for monitoring and evaluating regional droughts. A variable infiltration capability distributed hydrological model based on a river basin grid unit is coupled to achieve comprehensive continuous monitoring and stimulation of the droughts. The method has advantages in presenting area distribution features of the droughts and change situations along with time, meanwhile, further changes of disaster situations can be forecasted and predicted according to meteorological information and river basin social and economic data.

The invention provides a large-area farmland crop water status monitoring method based on unmanned aerial vehicle infrared thermal image acquisition. The method comprises the following steps: 1)arranging auxiliary devices in the field, that is, field air temperature sensors and a ground full-evaporation reference surface; 2) carrying out large-area infrared image acquisition on farmland corps through an infrared thermal imaging system fixed to an unmanned aerial vehicle through a pan-tilt, and synchronously triggering a GPS module to obtain positioning information of the corresponding images; and 3) receiving by a ground data processing system the infrared images and the positioning information, carrying out image registering, splicing and segmentation on the images, extracting spatial distribution of canopy temperature and ground full-evaporation reference surface temperature, calculating the temperature of leaves when the stomas of the crops are fully closed, and finally, calculating water deficit index of the crops and carrying out highlighted display and early warning on the areas, where the water deficit index of the crops is higher than a critical value. Besides, the invention also provides a system suitable for the method. The method and system are suitable for large-area farmland crop water status monitoring, facilitate to realize agriculture precision irrigation and improve agricultural modernization level.

The invention relates to the technical field of forecast and control in insufficient irrigation of crops and discloses control system and method for insufficient irrigation of crops. A data base including data such as water requirement, pan coefficient and water deficit percentage allowed by insufficient irrigation is established for corps in different areas and different growth phases. Evaporation from water surface of evaporation pans and rainfall are acquired by an automatic data acquisition system. Start time and duration of irrigation are calculated according to a formula. Forecast and control in insufficient irrigation are achieved by a controller system. The control method is applicable to forecasting and controlling insufficient irrigation for field crops in arid and semi-arid areas, gardens and protected agriculture, and is applicable to various irrigation methods of spray irrigation, drip irrigation, basin irrigation and the like. The control system and method are widely applicable. The control method is simple and is low in cost. Precision is guaranteed, and automation level is high.

The invention discloses an integrated intelligent irrigation system based on a cloud platform. The system comprises a drop irrigation unit, a control part, a gateway and a remote monitoring platform. A soil moisture sensor and an infrared thermal imaging device are connected with a wireless communication device through a wireless network, the wireless communication device transmits photos photographed based on soil moisture and growth conditions to partition controllers through the wireless network, the partition controllers are used in cooperation with the soil moisture sensor and infrared images to calculate crop moisture crop water deficit indexes, the water deficit index information is connected with a master controller through the wireless network, multiple sets of preset values of water demand in the growth stage of crops are stored in the master controller, and the remote monitoring platform controls a water pump according to microprocessor data to work when the current water deficit indexes are smaller than the corresponding current soil humidity value in the preset values.

The invention discloses a multi-level urban sewage water reuse-and-recycle configuration data's dynamic processing method based on multi-objective hybrid genetic algorithm, comprising: 1) obtaining the basic information data of multi-level water resources relationship; establishing a multi-level data configuration relationship between urban centralized sewage treatment plants and centralized water regeneration plants; 2) obtaining basic information data and other data information about the urban centralized sewage treatment plants and the centralized water regeneration plants; 3) according to the above basic information data, establishing a multi-objective data configuration model which considers the conditions of water quality balancing, water supply capability, water transporting capability, water requiring capability and risk constraints wherein the objective function is a multi-objective function with the largest total water resources utilization, the maximum benefit of water resources reuse and the minimum per capita water deficit in sub-areas; and 4) using the multi-level urban sewage water reuse-and-recycle configuration data's dynamic processing method based on multi-objective hybrid genetic algorithm to seek data configuration schemes for different scenes. The method of the invention can meet the reuse-and-recycle data configuration requirement for urban multi-objective and multi-level sewage water.

The invention relates to a method for determining feasibility of the working condition of water feed pump tripping operation by runback of auxiliary failure of a thermal generator set. The method comprises the following steps that: (1) the water deficit amount allowed by a boiler steam header is determined when the water feed pump tripping operation runs back; (2) the smallest beginning time of the runback t1 is determined; (3) the smallest continuous time of the runback t2 is determined. The method has the advantages that: the method can carry out determination and evaluation to the feasibility of water feed pump runback and improve the success rate of the water feed pump runback and the safe operation level of the generator set.

The invention relates to the technical field of application of satellite remote sensing to disaster reduction, and in particular relates to an agricultural drought disaster-inducing factor risk assessment method based on real-time daily precipitation and environmental disaster-reduction satellite data. The agricultural drought disaster-inducing factor risk assessment method is based on real-time daily precipitation and environmental disaster-reduction satellite, and mainly comprises the steps of 1: calculating a precipitation deficit rate according to the real-time daily precipitation; 2: according to environmental disaster-reduction satellite multi-spectral data, calculating a ground water deficit rate; 3: calculating a normalized differential vegetation index according to the environmental disaster-reduction satellite multi-spectral data; 4: according to the precipitation deficit rate, the ground water deficit rate and the normalized differential vegetation index, constructing an agricultural drought disaster-inducing factor risk index; and 5: according to the agricultural drought disaster-inducing factor risk index, classifying and grading an agricultural drought disaster-inducing factor risk.

The invention relates to a quick method for relieving water deficit of plants in arid desert areas. According to the method, the stimulation effect of water supply on a soil seed bank, the range in which soil condensate appears easily, the influence of a canopy structure on condensed water and a condensing surface made of dense nylon screens are used, so that the formation of hydroscopic water in different ranges, atmospheric water vapor condensed water and soil water vapor condensed water is promoted, an effective water supply is provided for the germination and seedling emergence of the soil seed bank, the plants are helped to overcome drought, and then the aim of relieving the water deficit of the plants in the arid desert areas is fulfilled. By the method, the survival rate of annual plants in the arid desert areas in which the amount of precipitation is less than 150mm, the amount of evaporation is more than 2,000mm and the groundwater depth is large (3 to 4m) is improved, and the invalid dissipation of the condensed water is avoided.

The invention provides a device for monitoring the water drinking amount. The device includes a microprocessor, a memory, a display screen, a load bearing unit and a key area, wherein the load bearing unit and the key area are connected with the microprocessor through a communication interface circuit. The microprocessor is used for accumulative calculation of the water drinking amount and a water deficit of the day; the memory is used for storing an operation result of the microprocessor and a prompt tone for prompting a user to drink water; the load bearing unit includes a scale pan, a weighing sensor and an A/D converter, wherein the scale pan is used for bearing a water cup, the weighing sensor is used for sensing the weight of the water cup on the scale pan, and the A/D converter is sued for converting an analog signal of the weight of the water cup output by the weighing sensor to a digital signal; and the key area includes an on/off key, a reset key, a water drinking amount/water deficit key, wherein the on/off key is used for starting/stopping the device for monitoring the water drinking amount, the reset key is used for resetting the current water drinking amount, and the water drinking/deficit amount key is used for switching the current accumulated water drinking amount and the current water deficit on the display screen. The invention also provides a method for monitoring the water drinking amount.

The invention provides a drought early warning method and device, computer equipment and a storage medium. The method comprises the steps of obtaining the unit water deficit of a target early warning object in a preset unit duration; based on a preset accumulated water shortage time length, obtaining an accumulated water shortage amount corresponding to the water shortage amount; based on a preset function analysis algorithm, processing the accumulated water deficit to obtain a drought index value; determining the drought level of the target early warning object according to the drought index value; and according to the drought level, performing waterway prevention and control on the target early warning object. According to the method, drought early warning can be carried out on three object types including weather, agriculture and ecology, the data acquisition requirement conforming to the current monitoring level is met, and the early warning accuracy of various types of drought objects is effectively improved.