44results about How to "Understand the impact" patented technology

The invention discloses an agricultural irrigation system based on the internet of things. A control terminal module is used for remotely control an information collection module and an irrigation machine, wherein the control terminal module is connected with the information collection module through a communication module, and the information collection module is used for collecting soil and air information; the information collection module comprises a temperature sensor, a soil moisture sensor, an illumination intensity sensor and an air humidity sensor; the information collection module is connected with an information processing module; the control terminal module is connected with the irrigation machine through the communication module. The agricultural irrigation system based on the internet of things can achieve startup and shutdown of the irrigation machine, remote wireless startup and shutdown of the irrigation machine and information management of the irrigation machine according to the requirement of a farmer and a site; the system is distributed at each irrigation equipment point of a monitored agricultural irrigation area, achieves concentrated remote management dispatch of agricultural irrigation, saves the farming time of the farmer and improves the agricultural production efficiency.

The invention provides a model ice pushing device. A side bridge of a trailer is provided with two die fixing holder, a lower end of a first die fixing holder is provided with an open water test case, a propeller model is arranged on the open water test case, a lower end of a second die fixing holder is provided with a linear module group, a servo motor is mounted on an end part of the linear module group, an output shaft of the servo motor is connected with a leading screw of the linear module group, a connecting plate is fixedly connected on a sliding block of the linear module group, a lower end of the connecting plate is at least provided with a pair of distance-adjustable connectors, lower ends of each pair of distance-adjustable connectors are provided with model ice fixing devices, model ice is placed in the model ice fixing devices, and the side bridge of the trailer is also provided with a control system. The model ice pushing device is suitable for testing and research on model ice of different sizes and different moving states and a ship propeller, and mutual effects between the propeller and ice during ship navigation in an ice zone can be simulated in real way; the model ice pushing device is advantaged by high stability, convenience of operation, high control precision and the like; test accuracy is effectively improved.

The invention provides a chemical medicine management method. The method comprises the following steps that: collecting real-time data, wherein the real-time data comprises one of cabinet door state information, chemical medicine information and weight information or the combination of several of the above information; according to the real-time data, generating monitoring information; and sending the monitoring information to a management server. By use of the method, the problems of large space occupation, high cost, difficulty in supervision and low efficiency in an existing chemical medicine management technology are solved, and the chemical medicine management method which can accurately manage chemical medicines and is low in cost and high in management efficiency is provided. The invention also provides a chemical medicine storage cabinet and a chemical medicine management system.

The invention discloses a KIR and ligand genetic typing experimental method. By the technology, the time and labor are saved, and meanwhile, DNA sample capacity is further saved. A multi-PCR technology is adopted, meanwhile, 36 pairs of primers are further combined according to the sizes of PCR products, and finally, amplified reaction is finished in 12 reaction holes. The KIR and ligand genetic typing experimental method is conveniently applied to amplification of 96 pore plates, conventional Taq enzyme is used, typing of all KIR genes and ligands thereof can be finished at a time under the same reaction conditions, and the practicality of the KIR and ligand genetic typing experimental method is greatly improved. Two pairs of primers are used for a KIR gene, the accuracy is improved, anda false negative result is avoided. The KIR gene can be combined to MHC-I type ligand molecules on the surfaces of targeting cells, inhibiting or activating signals are transmitted to regulate the activity of NK cells and T cells, and the KIR and ligand genetic typing experimental method plays an important regulation role in hematopoietic stem cell transplantation, feto-matemal tolerance, anti-infectious immunity, tumor immunity and autoimmune diseases. Therefore, KIR genetic typing facilitates understanding of influences of KIR to tumor immunity, hematopoietic stem cell transplantation and autoimmune diseases.

The invention discloses a method for measuring sheet metal deformation based on images, which adopts a multi-axis rotation and lifting structure, a CCD camera, an optical lens, and an image and data processing computer. The images of a sheet metal before and after deformation are shot and stored in the image and data processing computer to form data files; and a forming limit diagram and parameter information are acquired through a bulging test and a tension test respective to form standard data files. The method can store and analyze material performance in various aspects so as to screen spare sheet metals from various aspects.

This invention discloses a generation method for data diagrams including: setting up key event information containing time and event description and data information containing at least time and data values, generating a data diagram containing at least time, event description and data values taking time as the primary standard. This invention also discloses a generating system of data diagrams, which displays the cause of sudden change of data directly.

The invention discloses a power module dust removing method, system and device and a computer readable storage medium. The method comprises the steps that the current load rate, the current environment temperature and the current cavity interior temperature of a power module are obtained, the current standard cavity interior temperature corresponding to the current load rate is determined according to the corresponding relation, established at the standard environment temperature, between the load rate and the standard cavity interior temperature; and on the basis of the above conditions, thecurrent theoretical cavity interior temperature can be determined, accordingly, the current temperature difference can be obtained through calculation, and if the current temperature difference is larger than or equal to the preset temperature difference threshold value, a draught fan is utilized for conducting dust removing treatment on the power module. According to the power module dust removing method, system and device and the computer readable storage medium, through real-time knowing of the load rate of the power module and the temperature rise situation in a cavity, the current dust accumulation situation is inferred, the draught fan is utilized for conducting dust removal on the power module in time, the problem that heat dissipation of the power module is slow under the low loaddue to dust accumulation is solved, and the service life of the power module is prolonged.

The invention discloses a detection method of a phytoplankton structure, which comprises the following steps: a, acquiring phytoplankton water samples, b, extracting DNA, c, detecting PCR and agarose by electrophoresis, d, analyzing the phytoplankton structure by a denaturing gradient gel electrophoresis technology, e, processing graphics, and f, analyzing data. In the invention, the PCR product is analyzed by 8% of polyacrylamide gel, the concentration of denaturant is from 35% to 50% (100% denaturant is the mixture of 7M urea and 40% of deionized formamide), and electrophoresis is carried out for 6h in a 1 * TAE buffer solution at 150V; or the PCR product is analyzed by 10% of polyacrylamide gel, the concentration of denaturant is from 30% to 55%, and electrophoresis is carried out for 8h in a 1 * TAE buffer solution at 150V. The invention can accurately detect the structure composition of the phytoplankton, and is conducive to the warning of the outbreak of the phytoplankton red tide.

The present invention provides a chemical medicine management method. The method comprise: obtaining the monitoring information of a chemical storage cabinet; calculating the chemical medicine usage record according to the monitoring information; and determining whether the usage is located in the reasonable usage range or not according to the chemical medicine usage record and the reservation application. The problems are solved that the current chemical medicine management technology is large in space occupation, high in cost, difficult in monitoring and low in efficiency. The present invention provides a chemical medicine management method capable of accurately managing chemical medicine and having low cost and high management efficiency. The present invention further provides a chemical medicine management server.

The invention discloses a use method of a DGGE (Denatured-Gradient Gel Electrophoresis) technique, which is characterized by comprising the following steps of: (1) collecting algal cells; (2) extracting total DNA (DeoxyriboNucleic Acid); (3) designing and optimizing PCR (Polymerase Chain Reaction) primers; (4) detecting by using agarose electrophoresis; (5) preparing denaturing gradient gel; (6) optimizing the electrophoresis conditions; and (7) analyzing microalgae by utilizing the DGGE technique. 18S rDNA, 28S RDNA and ITS (Intertek Testing Service) region sequences of common microalgae are downloaded from a GenBank, MegAlign analysis is carried out by utilizing DNA Star software to select a sequence high-mutation region, Primerprimer 5.0 is used for the primer design of conserved regions at both sides of the high-mutation region, and then, various parameters of the designed primers are estimated by using Oligo software to select the optimal primer for synthesis. The invention can accurately detect the structural composition of a phytoplankton community and is beneficial to the outbreak warning of a phytoplankton red tide.

The invention discloses a use method of a DGGE (Denaturing Gradient Gel Electrophoresis) technology in detecting a phytoplankton structure. The method comprises the following steps of: filtering a phytoplankton water sample by using a bolting silk of 200 meshes; then filtering filtered seawater by using a nitrocellulose membrane with an aperture of 0.45 mum; transferring the filter membrane into an Eppendorf tube of 2ml and placing the Eppendorf tube at -20 DEG C for analyzing the diversity of the phytoplankton; collecting and washing algae cells and extracting DNA; carrying out a PCR (Polymerase Chain Reaction) and agarose electrophoresis detection; analyzing the phytoplankton structure by using the DGGE; and finally, carrying out graphic processing and data analysis. The method can accurately detect the structural composition of the phytoplankton and is beneficial to the early warning of the red tide breakout of the phytoplankton.

The invention discloses an underground water model output uncertainty analysis method in combination of a frequency analysis method and a sensitivity analysis method. The frequency analysis process comprises a parameter estimating process and a supposed checking process, wherein a typical distribution function in 7 is selected as an alternative probability density function, the supposed checking is carried out, and a proper probability density function is selected for the underground water level sequence. The sensitivity analysis method comprises stepwise regression analysis and mutual entropy analysis; the stepwise regression analysis can be used for analyzing the trend of the uncertain importance of an input variable, and the mutual entropy analysis can be used for well identifying the uncertainty factor. The method can be used for making up the deficiency in research content of the traditional uncertainty analysis method, analyzing the probability distribution characteristic and identifying the key uncertainty factor influencing the variable probability distribution, thus the production and source of the underground water model uncertainty can be well understood, feedback is provided for the data acquiring work of the underground water model, and the uncertainty of the model is reduced.

The invention provides a surface type analytical methodbased on an aspherical lens of a three-layer liquid structure. The surface type analytical method comprises the steps that first, an aspherical lens structure model of the three-layer liquid structure is established; second, the changing situation of liquid surface type of the aspherical lens structure model at applied voltage is emulated; third, a surface type numerical value obtained from model emulation is fitted by emulation software into an aspherical surface type function to obtain a corresponding aspherical coefficient; and fourth,the applied voltage is changed, the aspherical coefficient under different voltage and the corresponding relation of the voltage are fitted into function, and the aspherical coefficient and the corresponding relation of the applied voltage are drawn into a curve chart. The surface type analytical method is based on establishment of the three-layer liquid lens structure, by fitting thesurface typeinto theasphericalfunction, multiple groups of the numerical values of the aspherical coefficient under the different voltage are calculated and fitted into the function, then drawn into the curve chart, and concrete analysis of the aspherical surface type is achieved through the curve chart.

The invention relates to a visual controllable rough single-fracture seepage simulation device and a use method thereof.The visual controllable rough single-fracture seepage simulation device comprises a mixing and stirring unit, a single-fracture simulation unit and a waste liquid recovery unit, the single-fracture simulation unit comprises an expansion conversion interface and a simulation box, and at least four single-fracture movable boards with adjustable inclination angles are arranged in the simulation box; the simulation box comprises a front transparent plate and a rear transparent plate, at least three longitudinal guide rails allowing corresponding single-fracture movable plate surfaces in the simulation box to slide up and down are correspondingly arranged on the inner side surfaces of the front transparent plate and the rear transparent plate, and sliding handles are mounted at the joints of the longitudinal guide rails and the single-fracture movable plate surfaces; the at least four single-fracture movable boards are arranged in the simulation box in an upper-lower two-group mode, a space defined by the upper-lower two-group single-fracture movable boards, the front transparent board and the rear transparent board is a sealed cavity, and an inlet and an outlet of the sealed cavity are an inlet and an outlet of the simulation box. And the influence of the seepage condition between rock fractures and the opening roughness on fracture seepage in different types and different environments can be simulated.

The invention relates to a device for observing coriolis force and an observation method. The device comprises a basin, a tray, a tray holder, a support frame, a water spray pipe, a water outlet pipe, a water return pipe, a pipe joint, a sleeve, a shaft sleeve, a spindle, fillers, a sealing ring, an upper filler pressure cover, a lower filler pressure cover, a water pump, a motor, a large belt pulley, a small belt pulley, a panel, a water pipe, a rotary reducer, a capacitor, a reactor, a transfer switch and the like. The observation method comprises the following steps of: making a basin midline and a rotational center mark, connecting a power supply of the water pump to pump water, and observing the track phenomenon of a water line formed by the water sprayed through a water spray hole; connecting a power supply of the motor to enable the basin to rotate, selecting a rotational speed, a clockwise rotational direction and an anticlockwise rotational direction, and observing the track deflection phenomenon of the water line in a rotating reference system; and when the basin has much stored water, disconnecting the power supply, and draining the water back to a water tank. The method is intuitive in observation and can be used for knowing and researching the coriolis effect and the coriolis force through the track deflection phenomenon of the water line in the rotating referencesystem.

The invention provides a motion relation processing method and a motion relation processing device. The method comprises the following steps: determining at least three human body test points on the body surface of a pregnant woman, and placing a sensor on each human body test point; at a predetermined cycle, determining the motion modes of the pregnant woman, and in accordance with data measured by each sensor, determining the heart locations of a fetus; and establishing a corresponding relation between the motion modes of the pregnant woman and the heart locations of the fetus within each predetermined cycle; by virtue of at least two determined heart locations of the fetus, determining a motion locus of the fetus; and by virtue of the at least two established corresponding relations, establishing a corresponding relation between the motion modes of the pregnant woman and the motion locus of the fetus. Since different pregnant woman motions can result in different fetus motions, the influence of the pregnant woman motions on the fetus can be mastered by establishing the corresponding relation therebetween. Therefore, according to the technical scheme, the influence of the pregnant woman motions on the fetus is shown.

The invention discloses a method for identifying marine nematodes by denatured gradient gel electrophoresis. The method is characterized by comprising the following steps: (1) sampling and indoor sorting, (2) morphological identification, (3) extraction of total DNA, (4) designing and optimizing of PCR primers, (5) agarose electrophoresis detection, (6) preparation of denatured gradient gel, (7) optimization of denatured gradient gel electrophoresis conditions, and (8) identification and analysis to the marine nematodes by denatured gradient gel electrophoresis. The method has the advantages that a DGGE technology is used for identifying the marine nematodes, and is used for analyzing community composition of the marine nematodes; according to a characteristic map, the migration rate of related nematodes on the denatured gradient gel can be obtained, differentiation and identification can be carried out well, and for species which are difficult to identify, more than two pairs of primers are required to be used in a combined manner at times.

The invention provides a pair of body physiological status monitoring glasses. The pair of glasses comprises a glasses frame, and a camera, a main board, a sensor module, an antenna and a battery which are arranged in the glasses frame. The camera, the sensor module, the antenna and the battery are all connected to the main board. The camera is installed on the inner side of the glasses frame andused for photographing human eyeballs and obtaining body physiological status information from images of periorbital blood vessels, fundi, pupils and the like. The eyeglasses are provided with temperature, vibration and sweat sensors and a gyroscope so that the pulse, body temperature, sweat pH and other physiological information of a human body and the posture, action information and environmentinformation of the human body can be obtained. The glasses have wireless communication, positioning and data storage functions. The vital sign information monitored, recorded and transmitted by the glasses in real time is diversified, the diagnosis and analysis accuracy can be easily improved, and timely response can be easily made.

The invention, which belongs to the field of precision testing technologies and instruments, discloses a gear tooth deformation calculation method under introduction of a measuring force in gear double-sided meshing measurement. The method comprises the following steps: (1), causing deforming of a gear tooth by a measuring force in double-sided meshing and thus changing a double-meshing center distance to affect a double-meshing error curve; calculating gear tooth deformation values caused by the measuring force in left and right meshing line directions, and superposing the gear tooth deformation values at left and right meshing lines according to meshing phases to obtain a double-meshing center distance variable quantity caused by the measuring force; (2), dividing the component of the measuring force in the meshing line direction by the gear rigidities on the meshing lines to obtain deformation values in meshing line directions; (3), carrying out superposition of rigidities of all contacts at each meshing line to obtain the gear rigidity of each meshing line; (4), forming the rigidity of the gear at one contact point by the bending rigidity and the shearing rigidity of the gear tooth and the contact rigidity of the gear surface; and (5), calculating the bending and shearing rigidities by a cantilever beam model and calculating contact deformation based on a Hertz formula.

The invention belongs to the technical field of deep space exploration, aims at solving problems of poor autonomy, a low integration degree and overlarge size and weight of a current space detector, and relates to an autonomous navigation flight control system for deep space impact. The system comprises a first bearing device and a second bearing device which are separately arranged, and the firstbearing device is internally provided with a flight control and information processing module, a space navigation camera module, an inertia measurement module, an energy module, an attitude and orbitcontrol execution module and a wireless communication module which are in communication connection with one another; and the flight control and information processing module can make the attitude andorbit control execution module complete a preset flight task based on image information collected by the space navigation camera module and inertia sensitive information detected by the inertia measurement module. The second bearing device is driven by the power device to rotate along an axis of the second bearing device, and the first bearing device can rotate and separate relative to the axis of the second bearing device. In the invention, lightweight, miniaturized and integrated autonomous flight control of a space exploration aircraft can be realized.

The invention relates to a low-sand-content density flow physical model and a test method thereof. The low-sand-content density flow physical model comprises a runner model, a clear water reservoir, afirst clear water orifice box, a first muddy water orifice box, a muddy water stirring tank, a low regulation and storage tank, a high regulation and storage tank and an outlet water storage tank. Anoutlet of the clear water reservoir communicates with an inlet of the first clear water orifice box; an outlet of the muddy water stirring tank communicates with an inlet of the first muddy water orifice box; and an outlet of the first clear water orifice box and an outlet of the first muddy water orifice box communicate with an inlet of the runner model. By designing the physical model of the water reservoir to be tested, evolution characteristics of the sand content of the water reservoir can be tested when water and sand are converged to form the low-sand-content density flow, so that theinfluence of the water and sand convergence on the water reservoir environment can be known.

The invention discloses a full-link performance test method and system, a pressure test process is carried out in an automatic form, time for pressure test preparation, execution, report carding and analysis is saved, and normalized pressure test is supported. According to the technical scheme, the system comprises a front-end module for providing visual display of scene link monitoring index information; a back-end module which is used for acquiring application list information, application interface list information and an interface calling relation from the outside, and generating an interface link relation between applications according to the interface calling relation; a database module which is used for storing the interface link relationship between the applications generated by the back-end module; a Web pressure test system controller module which distributes the pressure test script to one or more Web pressure test system proxy servers for execution; a Web pressure test system proxy server which is used for loading the pressure test script to run a test process and a thread corresponding to the script; and a monitor which is used for reporting the resource use condition of the deployed application server.

The invention provides an adjustable type overland flow testing device which comprises an overland water tank as well as soil fixing grids and a surface plate, wherein the overland water tank is of an overland inclined structure supported by support columns; the soil fixing grids are provided with telescopic support feet; the surface plate is provided with telescopic support feet; the overland water tank is an integrated groove consisting of a base water tank and a surface flow collecting tank which is connected with the water outlet end of the base water tank; the water inlet end of the base water tank is opened; the water outlet end of the base water tank is sealed; first tail water collecting holes are formed in the bottom of the water outlet end of the base water tank; the water inlet end of the surface flow collecting tank is opened; the water outlet end of the surface flow collecting tank is sealed; a bottom plate at the water inlet end is connected with the top end of a vertical sealing plate at the water outlet end of the base water tank; second tail water collecting holes are formed in the bottom plate; the soil fixing grids are arranged on the bottom plate of the base water tank; the surface plate is arranged on the bottom plate on one side of the water outlet end of the base water tank; one end of the surface plate is connected with the soil fixing grids; the other end of the surface plate is connected with the bottom plate of the surface flow collecting tank; a first screening net is arranged between the bottom plate at the water outlet end of the base water tank and the surface plate with the telescopic support feet.

The invention discloses a detection method and device of the heating amount of a high-temperature superconducting bulk material. The method comprises the following steps: under a stable magnetic field, calculating according to the temperature data measured by a sensor arranged at the top in a container in advance to obtain first liquid nitrogen loss amount of the container in a pre-set duration; when the container is located in a changeable magnetic field, calculating according to the temperature data measured by the sensor arranged at the top in the container to obtain second liquid nitrogen loss amount of the container in the pre-set duration; and according to a difference value of the first liquid nitrogen loss amount and the second liquid nitrogen loss amount, calculating to obtain the heating amount of the high-temperature superconducting bulk material, which is arranged in the container, is immersed in liquid nitrogen and is located in the changeable magnetic field, in the pre-set duration. According to the detection method and device of the heating amount of the high-temperature superconducting bulk material, disclosed by the invention, the heating amount of the high-temperature superconducting bulk material, which is arranged in the container, is immersed in liquid nitrogen and is located in the changeable magnetic field, can be accurately estimated.

The invention provides a model ice pushing device. A side bridge of a trailer is provided with two die fixing holder, a lower end of a first die fixing holder is provided with an open water test case, a propeller model is arranged on the open water test case, a lower end of a second die fixing holder is provided with a linear module group, a servo motor is mounted on an end part of the linear module group, an output shaft of the servo motor is connected with a leading screw of the linear module group, a connecting plate is fixedly connected on a sliding block of the linear module group, a lower end of the connecting plate is at least provided with a pair of distance-adjustable connectors, lower ends of each pair of distance-adjustable connectors are provided with model ice fixing devices, model ice is placed in the model ice fixing devices, and the side bridge of the trailer is also provided with a control system. The model ice pushing device is suitable for testing and research on model ice of different sizes and different moving states and a ship propeller, and mutual effects between the propeller and ice during ship navigation in an ice zone can be simulated in real way; the model ice pushing device is advantaged by high stability, convenience of operation, high control precision and the like; test accuracy is effectively improved.

The invention provides a flexible vegetation motion simulation method based on nonlinearity of different waves. The method comprises the following steps: S1, establishing and verifying a flexible vegetation dynamic model under the action of the waves; s2, the characteristic wave velocity and the wave period parameter KC (Keuleman-Carrier) number are calculated, and the KC (Keuleman-Carrier) number is calculated; s3, calculating a resistance coefficient of a given wave condition and a vegetation parameter in combination with an existing formula; s4, simulating the stress motion of the flexible vegetation under the conditions of given incident wave conditions and vegetation parameters; and S5, determining an influence rule of wave nonlinearity on motion of submerged flexible vegetation. According to the flexible vegetation motion simulation method provided by the invention, the flexible vegetation dynamic model and different wave nonlinear theories are used, the accuracy of flexible vegetation stress motion simulation is improved, the simulation theories and methods are optimized, and a foundation is laid for researching flexible vegetation wave dissipation.

The invention belongs to the technical field of electrochemical chips, and particularly relates to a transmission electron microscope electrochemical detection chip and a manufacturing method thereof. The transmission electron microscope electrochemical detection chip comprises an upper piece and a lower piece, the upper piece and the lower piece are both silicon substrates with insulating layers on the front and back surfaces, the front surface of the upper piece and the front surface of the lower piece are fixedly bonded through a bonding layer, and the upper piece, the lower piece and the bonding layer jointly form a cavity; and the upper piece is provided with a sample injection port and a first window, the lower piece is provided with a working electrode, a reference electrode, a counter electrode, a second window and a thermometer, and the working electrode, the reference electrode and the counter electrode are all arranged on the second window. The lower piece of the transmission electron microscope electrochemical detection chip provided by the invention is provided with the thermometer, and the thermometer can be used for monitoring the reaction temperature in real time, so that a user can better know the type of an electrochemical reaction heat absorption and release reaction and the influence of the temperature on the electrochemical reaction. The manufacturing method provided by the invention can be used for manufacturing the transmission electron microscope electrochemical detection chip.

The invention discloses a wind speed early warning control method for large hoisting operation equipment based on wind speed signals. Wind speed measuring instruments are installed at the top end and / or the bottom of the large hoisting operation equipment, the wind speed signals detected by the wind speed measuring instruments are transmitted to a wind speed monitoring information processing system through wires, wind speed information of a field operation area is monitored in real time, the wind speed monitoring information processing system sets a wind speed early warning value and a limit value according to the requirements of a crane safety operation procedure, early warning or operation stopping information is sent to an operator at the wind speed early warning value and the limit value, and operation in a dangerous environment is stopped in time. According to the wind speed early warning control method, the wind speed signals of the operation environment are monitored through the wind speed measuring instruments, operation early warning or operation stopping indication is carried out according to the requirements of the crane safety operation procedure, and the safety degree of operation is effectively improved.

The invention discloses a BIM-based traffic control method in road traffic accidents, which includes establishing a BIM model corresponding to road engineering; recording the type of accident and the cause of the accident in the BIM model, and determining the rectangular accident area in the BIM model; according to the rectangular accident area Determine the length and width of the working area; determine the closed lane according to the number of lanes covered by the working area; automatically generate the vehicle parking area in the BIM model; determine the location of the vehicle parking area according to the closed lane; identify the warning area in the BIM model , the length of the upstream transition zone, the buffer zone, the downstream transition zone and the termination zone; determine the placement position of the sign and the cone barrel, and automatically generate it in the BIM model; the present invention combines BIM technology to visually display the position of the accident area on the road section, Scientifically and rationally arrange the scope of the traffic control area, reasonably place signs and cones, greatly improve efficiency, and prevent secondary traffic accidents.