192results about How to "Facilitate scientific research" patented technology

The invention relates to an object recognition system on the basis of the virtual reality, wherein, the object is stared by a driver. The invention comprises an eye tractor (1) and an automobile driving simulation system, wherein, the automobile driving simulation system comprises an automobile driving simulator (5), a display screen (2) and a simulation system computer (3), wherein an output terminal of the eye tractor (1) is connected with the simulation system computer (3) which comprises a driving simulation program module, a scene manager, a scene staring object positioning ray calculation module, an intersectant vision object calculation module, an intersectant vision object recognition module and a fixation point screen coordinate calculation module; the scene manager comprises world coordinates of each object in the scene and the category information. The object recognition system combines the virtual reality technique and identifies the types of staring objects on the basis of tracking and obtaining the fixation point coordinates of the driver; the test efficiency is high, the cost is low, and the statistic of the test result is easily realized, thereby contributing to the scientific research.

The present invention relates to a high-resolution remote-sensing image land cover change detection method based on history data mining, which comprises: acquiring historical land cover data, a corresponding history period high-resolution remote-sensing image and a current high-resolution remote-sensing image and under the constraint of the historical land cover data, segmenting the high-resolution remote-sensing image by using an image segmentation algorithm to obtain objects with homogeneous internal spectrums and textures; selecting part of unchanged objects, carrying out relative radiometric correction on the high-resolution remote-sensing image in two periods, and dividing the rest of objects into unchanged objects and suspected changed objects by using a mean square error obtained upon radiometric correction as a threshold; extracting spectrum and texture characteristics of the objects in the history period image and acquiring a classification rule by using a machine learning algorithm; and classifying the suspected changed objects in the current high-resolution remote-sensing image by using the classification rule so as to obtain a change detection result. The high-resolution remote-sensing image land cover change detection method according to the present invention has great application prospects in the aspect of using the high-resolution remote-sensing images to automatically update the land cover data, carry out change detection or carry out classification.

A superparamagnetic MRI contrast medium is a Fe3O4 nanoparticl coated by polyol moleculae. Its preparing process includes such steps as high-temp reaction of Fe contained compound in polyol solution, cooling, depositing, separating, dispersing it in water, filtering, and sterilizing. It has high crystalline level, high saturated magnetic intensity and high imaging effect.

Disclosed is an automatic shading cover type full-perspective constant-temperature beehive which can be manually arranged and in which motions of bee colonies can be observed in all dimensions. The automatic shading cover type full-perspective constant-temperature beehive consists of a base box, a heat-preservation insulation layer, an automatic constant-temperature device, a temperature display setter, a manual air adjusting window, beehive legs, a cover plate ring, an air vent, a beehive door hole, a feed hole, a strip-shaped hole, a bee-isolation breathable frame and a slag-falling preventive baffle plate. A transparent beehive body is mounted on the manufactured automatic constant-temperature base box, and is covered by a transparent top cover plate with an exhaust hole and by a sunshading heat-preservation outer cover after bee colonies are filled therein. By removing the outer cover, local honey and powder resources and the most beneficial temperature in the beehive for living and breeding of the bee colonies and the like can be known at anytime and anywhere. The automatic shading cover type full-perspective constant-temperature beehive is beneficial to scientific research and bee field management, can be directly used for production, meets requirements for perspective view and has the advantages of no vibration and noise, low energy consumption and convenience in use.

The invention relates to a controller design method of a duct type multi-rotor mooring UAV, belongs to the field of control algorithms, and aims at solving the problem that a UAV controller is low incontrol capability and anti-interference capability due to the fact that a present simulation platform of a UAV control system is incapable of optimizing control parameters sufficiently. According tothe controller design method, a finite element analysis method is used, pneumatic characteristic parameters of the total structure of the duct type multi-rotor mooring UAV is analyzed, a dynamic modelof the UAV is established and distribution values for tension control of different motors are obtained according to the pneumatic characteristic parameters, and the pneumatic characteristic parameters are measured; the established model is combined with the measured pneumatic characteristic parameters to establish a control simulation platform of a duct type mooring UAV control system is established in the simulink environment; and a fuzzy PID controller is used to design the duct type mooring UAV control system with mooring cables, and the parameters are improved.

The invention discloses a fixing device for mounting irregular-structural-plane samples of various shapes. The fixing device comprises a direction adjusting unit, wherein a flat plate is fixedly connected to the direction adjusting unit; a base is arranged on the flat plate; a bottom supporting plate is arranged in the middle of the base; the distance between the bottom supporting plate and the base is adjustable; the distance between the bottom supporting plate and the base is determined according to the height of a structural plane sample; a clamping unit is arranged on the base along a circumferential direction; the clamping unit comprises a hand wheel; the hand wheel is arranged on the base in a screw thread fit way; an upper end of the hand wheel is fixed at a lower end of a force application lever; an upper end of the force application lever is hinged to a lower end of a curved lever; an upper end of the curved lever is fixedly connected with a back end of a fan-shaped position adjuster; a clamping side plate is arranged at a front end of the fan-shaped position adjuster; an upper part of the curved lever is hinged with an upright post; a bottom end of the upright post is fixed on the base. The invention further discloses a fixing method for mounting irregular-structural-plane samples of various shapes with a shear apparatus. The fixing device and the fixing method are suitable for fixing irregular-structural-plane samples of various shapes, and are convenient for researching the anisotropy of structural planes.

The invention discloses an experiment incubator capable of measuring the depositional physicochemical parameters. The experiment incubator contains a box body. The experiment incubator is characterized in that the inside of the box body is provided with a plurality of sediment culture tubes; the upper and lower ends of each sediment culture tube are separately provided with a sealing plug, a liquid inlet pipe and a liquid outlet pipe penetrate through each sealing plug on the upper end, the lower end of each liquid outlet pipe extends in the culture solution of one sediment culture tube, the liquid outlet pipe of the sediment culture tube is communicated with the liquid inlet pipe of an adjacent sediment culture tube through a connecting duct; one connecting duct is provided with a miniature circulating pump used for driving the culture solution to flow circularly; and at least one sediment culture tube is provided with a multi-parameter electrode used for measuring the depositional physicochemical parameters. The advantage of the experiment incubator is as follows: the experiment incubator can be used for thermostatic culture and experimental measurement, thus the related scientific experiment and data monitoring can be performed and the environmental monitoring and scientific research can be facilitated.

Transcription factor is one important protein for gene regulation, is center of gene expression regulating passage and network, is important target of functional genome and protein block research and important target site of transcription treatment and medicine research. The present invention proposes exonuclease III digesting double stranded nucleic acid molecule coated in microporous plate and containing special marker to detect transcription factor protein. The process of analyzing transcription factor expression and activation level includes the following steps: preparing nucleic acid; fixing the nucleic acid molecules to the pores of the microporous plate; incubation of cell or tissue extract containing transcription factor in the plate; incubation of exonuclease III reaction liquid in the plate; incubation of specific conjugate with special marker on nucleic acid on the plate; detecting and analyzing the specific conjugate to obtain the expression and activation level.

The invention discloses a corynebacteria expression system without depending on antibiotic being selection pressure, and belongs to the microbe gene engineering field. Alr knock out carrier and expression carrier used for plasmid anaplerosis are constructed to bring conveniences for lab research and utilization, and a fermentation process no longer needs antibiotic. Through test results, the expression system realizes thalline inner plasmid stability in fermentation without adding the antibiotic; when the expression system is used to construct overexpression vector of branched chain amino acid-valine synthesis path main gene ilvBNC, valine output can be obviously improved; the corynebacteria expression system has wide application value.

The invention discloses a drag system for observing water transverse and longitudinal section chemical parameters. The drag system comprises a dragger system, an observation load system, an acquiringsystem and an electric control system. An armored cable is connected with a dragger fore body through a connecting head, and is dragged to advance in water; the dragger fore part comprises a water inlet pipe inside for acquiring water samples; wings are positioned on the two sides of a dragger, can be rotated to change angles for climbing or descending during navigation to enable the dragger to observe at a fixed depth, or can perform an up-down or left-right horizontal W type motion for 200 m water-depth longitudinal or 200 m-width transverse section chemical parameter measurement; and various chemical sensors, the acquiring system and the electric system are loaded at the middle part of the dragger after weight adding. The acquiring system is used for acquiring data of the chemical sensors and the water samples, which are sent to a ship deck through the special-machined armored cable. The electric control system can adjust attack angles of the wings according to depths and dragger postures to determine navigation depths and trajectories.

Provided is a combination storm resisting stable ocean platform. The platform is formed by combining and connecting various types of storm resisting buoyancy supports used alone or in mixing mode. The combination storm resisting stable ocean platform does not confront with nature, can harmoniously coexist with the nature, can remove various risk factor effects according to causes of various damage forces, can be fixed or sail, can collect wave energy, and is provided with an abovewater platform and device and staff, and an underwater platform and device and staff are additionally arranged. The storm resisting buoyancy supports are supporting points of the combination storm resisting stable ocean platform. The direction of acting force of floating weight of a traditional ship and a raft on a floating body is changed, a center of the gravity is lowered, water-entering depth of the center of the gravity is adjustable, and load is distributable and adjustable. Only upward buoyancy is provided for the ocean platform, and fluctuation of water can not be transferred to the ocean platform. The combination storm resisting stable ocean platform does not confront with the nature, can harmoniously coexist with the nature, can remove various risk factor effects according to the causes of various damage forces, and is applicable to various abovewater and underwater life, production and resource collecting tasks.

The invention relates to a measuring method and a measuring apparatus for the urban heat island strength, which considers the influence of at least three weather factors such as horizontal total wind speed, wind direction and air temperature to the measuring result of the urban heat island strength, applies the historical observation data of the city to be researched for establishing a data analysis process apparatus, and observes the observed result of the specific weather factors such as horizontal total wind speed, wind direction and air temperature of the city to be researched so as to correctly measure the urban heat island strength and provide a certain technology support for the weather study and atmosphere science.

The invention discloses a new energy power machine, and particularly relates to a fluid energy turbine machine, which is provided with an existing or improved cylinder and piston turbine machine body, has or does not have a connecting rod and crank mechanism, is additionally provided with an improved piston, a fluid inlet supercharging structure, a fluid drainage decompressing structure, a steam pressure conversion output and an output pressure adjusting structure, independently or integrally uses energy in fluid work media in various energy states, and converts the energy into mechanical energy or energy in other forms so as to work continuously. The existing or improved cylinder and piston turbine machine body absorb the energy of fluid in various energy states and realizes steam pressure conversion, and is a core for connection and energy output of other various structures. The additional improved piston absorbs energy of a fluid hammer. By the aid of the fluid inlet supercharging structure and the fluid drainage decompressing structure, fluid entering a fluid work cylinder rotates to generate supercharging vortex, and fluid drained from the fluid work cylinder rotates to generate homodromous decompression vortex. A vertical steam pressure conversion structure leads fluid to be drained out of the turbine machine body smoothly after the fluid finishes acting by the aid of steam pressure conversion.

The invention provides a permeability test experimental system of low-permeability clay, and belongs to the field of geotechnique clay permeability tests. The system comprises a water head supply unitcapable of supplying tiny water heads and high-pressure water heads, a sample treatment unit for clamping and pressurizing samples, a water supply and storage unit for providing percolating fluid andcollecting the fluid, a data acquiring and processing unit for acquiring and processing experimental data, and an incubator for controlling experimental environments. According to the system, the principles of variable water heads and constant water heads of the geotechnique permeability tests are combined, the modern data acquisition technology is introduced, and the test precision is effectively improved. On the aspect of scientific research, a device can provide temperatures, loads and water head differences to be used as variables, when low-permeability clay samples with different water contents are provided, the water contents can serve as variables for permeability research of the samples, and application of conversion between the constant water heads and the variable water heads can be carried out. On the aspect of engineering parameter requirements, the device can adopt the high-pressure variable water heads to test the permeability coefficient of the low-permeability clay, and the experimental time is effectively shortened.