63results about How to "Method innovation" patented technology

The invention relates to a cargo vehicle security state early warning method based on braking distance, in particular to a determination method of the early warning threshold of the on-road vehicle. Aiming at the condition that the on-road vehicle is easy to have some potential dangers, the method of the invention uses the braking distance as the starting point to reflect the secure state of the vehicle. The real-time monitoring method of the on-road state of the vehicle comprises the following specific steps: extracting various factors of the vehicle such as the brake parameters, the current state factor and the outer road environment factor to perform information integration, using a braking distance model to calculate the required braking distance d1 of the current vehicle, comparing with a safe braking distance d0, calculating the degree of risk to determine the current danger condition of the vehicle, and using the range of the degree of risk as the early warning threshold of the vehicle to perform graded early warning. The invention has high instantaneity, precision and accuracy, does not require complicated calculation and design and provides a scientific and effective method for the determination of the danger condition threshold of the vehicle.

The invention discloses a method for establishing a full three-dimensional coupling model of a reactor U-shaped tubular steam generator, which is suitable for all systems related to energy conversionby adopting a shell-and-tube heat exchanger in the field of energy. The coupling method mainly comprises the following steps: 1, simplifying a geometric model of the steam generator; 2, establishing aprimary and secondary side geometric model; 3, carrying out primary and secondary side three-dimensional computing node division; 4, performing spatial dispersion on a pipe side (primary side) energysource item; 5, performing spatial discretization on a shell side (secondary side) energy source item; 6, coupling primary and secondary side energy source items at the same coordinate node; and 7, performing data transmission between the primary side and the secondary side and on internal nodes of each side, and performing iteration to obtain a convergence solution. Geometric model simplification is mainly used for simplifying the workload caused by the number of a large number of heat transfer pipes to model establishment and numerical calculation. Primary and secondary side computing nodedivision adopts a completely identical division strategy; each side energy source item is obtained through a discrete flow heat transfer equation; and the data exchange of the energy source items on the two sides is carried out between the corresponding primary and secondary side computing nodes under the same coordinate.

The invention discloses a preparation method of a modified graphene / acrylate composite water-based coating, and belongs to the field of water-based coatings. The method comprises the following steps:preparing graphene according to a liquid-phase separating method; performing intercalated modifying on the graphene through a cationic surface active agent which is hexadecyl trimethyl ammonium bromide; then polymerizing in situ; copolymerizing sodium p-styrenesulfonate and acrylate to obtain modified acrylate; preparing hexadecyl trimethyl ammonium bromide modified graphene / acrylate composite water-based coating under the electrostatic interaction of electropositive ammonium ion and electronegative sulfonate group. The prepared modified graphene / acrylate composite water-based coating has theadvantages that the outstanding heat conduction capacity, the antistatic performance and the mechanical performance of the graphene are fully applied to acrylate, so that the performance of the composite coating can be greatly improved; the composite coating is outstanding in mechanical performance and heat conduction performance.

The invention discloses a simulating calculation method for porosity of a clastic rock reservoir on the basis of a diagenetic facies logging identification technology. According to the method, diagenetic facies in a research area is researched in a detailed manner with the diagenetic facies logging identification technology, so that a PDFP (present diagenetic facies profile) of the research area is established, and finally, porosity of an interval of clastic rock is subjected to simulating calculation through combination with burial history, thermal history, fluid history and pressure historyof the research area.

The invention relates to a preparation method of a silicon carbide aerogel thermal insulation material, and belongs to the technical field of thermal insulation materials. The preparation method of the silicon carbide aerogel thermal insulation material comprises preparation of a silicon carbide aerogel reinforced fiber material and an integral compounding process of the material. The preparation method comprises the steps of soaking a carbon fiber material in silica sol dissolved with silicon carbide, gelling, aging and drying to obtain a silicon carbide aerogel reinforced fiber material, and carrying out composite molding on the reinforced material to obtain the aerogel thermal insulation material. By applying the silicon carbide aerogel to the carbon fiber thermal insulation material, the carbon fiber thermal insulation material has the advantages of large specific surface area, low heat conductivity coefficient, small density and the like, and the preparation method is simple and easy for industrial mass production.

The invention discloses a well head and well bottom pressure conversion method for a shale gas horizontal well under two-phase flow conditions. The well head and well bottom pressure conversion method comprises the step of logging data, such as daily output, pressure and temperature of a production well head based on the condition that a well shaft of a shale gas production well has two phases of gas and liquid. The flowing states of the well shaft of a vertical section and a horizontal section of a gas well are analyzed by taking the influence of factors, such as nonlinear change of gas, a slippage effect and pipe wall frictional resistance, into consideration, and integrating a testing result of a production profile of the production well, so that a two-phase flow pipe flow model is selected, and well head and well bottom pressure conversion is carried out. According to the well head and well bottom pressure conversion method for the shale gas horizontal well under the two-phase flow conditions, the technical difficult problems about flow state distribution characteristics of the well shaft of the shale gas horizontal well are effectively solved by fully and comprehensively utilizing production dynamic monitoring data, and a foundation is laid for converting well head and well bottom pressure in the next step. Meanwhile, a result is verified by adopting underground permanent monitoring data and output profile test data; the well head and well bottom pressure conversion method has the characteristics that the method is innovative, the thought is rigorous, the application is simple, and the analysis results are accurate and reliable.

A water ecological risk assessment method for a typical area of ​​the Nen River Basin based on a system dynamics decision model, which relates to a water ecological risk assessment method for a typical area of ​​the Nen River Basin. The method of the present invention is as follows: through the system dynamics decision-making model, the tributary influx, non-point source discharge, upstream water and sewage discharge along the river that affect the amount of pollution sources entering the Nierji Reservoir are used to simulate different treatment schemes to reduce the pollution of the reservoir. The effect of ecological risk is to realize the decision-making of the plan, and on the basis of the water ecological risk index system, evaluate the water ecological risk status of different points in the lake in different periods, and build the sample space of Bayesian network based on Netica software to calculate each index The probability of occurrence of different degrees of ecological risk when changes occur, so as to realize the assessment of water ecological risk in typical areas of the Nenjiang River Basin. The invention is applied to water ecological risk assessment in typical areas of river basins.

The invention discloses an automation process safety monitoring system based on a Modbus protocol. The automation process safety monitoring system comprises a monitoring main machine, a full-function slave machine and simple-function slave machines. The full-function slave machine has a monitoring function and a linkage control function, and each simple-function slave machine only has a monitoring function. In automation process safety monitoring, the full-function slave machine is bound with a plurality of appointed simple-function slave machines, the full-function slave machine starts a Modbus communication network message to recognize a receiving program, monitoring data sent by the bound simple-function slave machines are analyzed out, whether the monitoring signal parameters of the bound simple-function slave machines are normal is judged, and linkage interlock protection is carried out if abnormity is found. The automation process safety monitoring system solves the problem that direct linkage control between slave machines cannot be achieved due to the fact that the slave machines cannot communicate with each other. Furthermore, the timeliness of the monitoring system is improved.

The invention discloses a data processing method for a Beidou and GPS common frequency point real-time signal receiving and processing system. Beidou second generation and GPS common frequency point signals are transmitted into three RF (radio frequency) front-end modules through the same antenna, through a series of amplification, filtering and down-conversion, the signals are converted into 2-bit medium-frequency digital signals in an A / D mode, the medium-frequency digital signals are acquired into an internal storage of an FPGA under the control of the FPGA and stored as data blocks of certain length in a ping-pong mode, and finally, the data blocks are transmitted to a computer through a USB controller. The method has the advantages that the technical purposes that the Beidou second generation and the GPS common frequency point signals are captured rapidly on a software framework of a computer platform and the data are processed in real time are achieved, and the locating accuracy, reliability, integrity and usability of a single locating system are remarkably improved; and based on software development of the software radio technology, an algorithm of a traditional hardware receiver is eliminated, and a reconfiguration research mode is achieved.

The present invention discloses a real-time signal receiving and processing system of public frequency points of a Beidou navigation satellite system and a GPS. Signals of the public frequency points of the Beidou navigation satellite system and the GPS enter three RF radio frequency front end modules through the same antenna, are subjected to a series of amplification, filtering and down-conversion processing, and are converted to 2bit medium frequency digital signals through the A / D (Analog to Digital) conversion, and the medium frequency digital signals are acquired to the internal storage of an FPGA under the control of the FPGA, are stored to be a data block with a certain length in a ping-pong mode, and are transmitted to a computer in a block mode through a USB controller. The real-time signal receiving and processing system of public frequency points of a Beidou navigation satellite system and a GPS is able to perform rapid capture and real-time data processing of signals of the public frequency points of the Beidou navigation satellite system and the GPS on the software architecture of a computer platform, and the like, therefore positioning accuracy, reliability, integrity and availability of a single positioning system are substantially improved; and moreover, the software development on the basis of the software radio technology is performed, thereby getting rid of the algorithm of a traditional hardware receiver and realizing the reconfiguration of a research mode.

A method for establishing a full three-dimensional coupling model of a reactor U-shaped tube steam generator is applicable to all systems in the energy field that use shell-and-tube heat exchangers for energy conversion. The coupling method mainly includes the following parts: 1. Simplification of the geometric model of the steam generator; 2. Establishment of the geometric model of the primary and secondary sides; 3. The three-dimensional calculation node division of the primary and secondary sides; 4. The energy source item space of the tube side (primary side) Discrete; 5. Discretization of energy source items on the shell side (secondary side); 6. Coupling of energy source items on the primary and secondary sides at the same coordinate nodes; 7. Data transfer between primary and secondary sides and internal nodes on each side, iteration a convergent solution. Geometric model simplification is mainly used to simplify the workload caused by a large number of heat transfer tubes for model establishment and numerical calculation; the division of primary and secondary calculation nodes adopts exactly the same division strategy; the energy source items of each side are obtained through discrete flow heat transfer equations; The data exchange of energy source items on both sides is carried out between the corresponding primary and secondary computing nodes under the same coordinates.

A method for preparing a super-hydrophobic composite nano-array interface material, the preparation steps are: 1) using a copper sheet as a base material to prepare a zinc oxide nanocone film by chemical bath deposition in a hot water bath; 2) using a vapor phase deposition method on Use seventeen perfluorosilane to super-modify the oxidized nano-cone membrane at 120°C; 3) configure polyvinyl alcohol low-solid content aqueous solution; The aqueous solution is atomized through the condensation platform to reduce the surface temperature of the copper-based zinc oxide nano-cone film to 1°C to 5°C, so that the polyvinyl alcohol dispersion liquid dispersed in the air can condense the surface of the super-hydrophobic zinc oxide nano-cone film evenly, at high magnification Atomized deposition under the observation of the CCD imaging system; 5) Quickly transfer to a constant temperature hot stage, and cure at a constant temperature. After the solvent moisture is completely volatilized, the polyvinyl alcohol is cured and adsorbed and adhered to the surface of the zinc oxide nanocone to form a hydrophilic-hydrophobic composite nano-array interface; The process is simple, the cost is low, and the resistance to condensation and frosting is high.