34results about How to "Reflect the distribution" patented technology

The invention discloses a simulation method of plugging of shale pore-throats by nanoparticles. According to structural features of shale pores, simulation dimensions and boundary conditions of shale are set; initial conditions of stresses and speeds of the nanoparticles in drilling fluid are set; according to features of the nanoparticles and the drilling fluid, a particle contact and motion model is built; a nanoparticle system and the process of contact, collision, deposition and migration with the particles, on the surface of the shale and in the pores of the shale, are solved by the discrete element method; shale pore plugging condition, plugged layer pore structure and the like are simulated; plugging law and plugging micro-process and mechanism are revealed.

The invention provides a semiconductor wafer film thickness detecting device on the basis of an infrared optical interference method and relates to the technical field of chemical-mechanical polishing devices for a semiconductor wafer. The device comprises a wafer bearing and moving mechanism, a laser assembly and a data detecting and controlling circuit and is characterized in that the laser assembly is a movable laser assembly and the wafer bearing and moving mechanism is a wafer bearing and rotating mechanism. By adopting the device, multi-point detection on the surface of the wafer can becarried out, thus knowing the thickness and distribution condition of a wafer surface film layer so as to ensure the process parameters of a next polishing process, thus perfecting the polishing process and increasing the product quality. The device is especially suitable for the chemical-mechanical polishing device for the semiconductor wafer.

The present invention provides a method for automatically generating a three-dimensional virtual city, including: generating main roads according to the initial urban road network and land use intensity in the land use model; generating block roads according to the main roads and the land use intensity; generating three-dimensional buildings based on the block roads; generating a three-dimensional virtual city according to the main roads, the block roads and the three-dimensional buildings. In the method for automatically generating a three-dimensional virtual city provided by the present invention, on the basis of the initial urban road network provided by the land use model, main roads are generated according to land use intensity, and further generated by using the main roads and the land use intensity Block roads and three-dimensional buildings, and then generate a three-dimensional virtual city corresponding to the land use model, which can comprehensively, accurately and intuitively reflect the distribution of roads and buildings in the city.

The invention relates to a three-region oxygen consumption method-based ventilation restricted space heat release rate measurement method, which comprises the following steps: S1, selecting an indoorflue gas measurement point, and arranging three flue gas analyzer probes in each of upper, middle and lower layer regions of a combustion space based on three layers of flue gas subregions, wherein the flue gas analyzer measures the concentrations of carbon monoxide and oxygen; S2, arranging a flue gas analyzer probe at each of an air inlet and a flue gas discharging port, wherein a flue gas analyzer measures the concentration of oxygen; S3, debugging the flue gas analyzers in Step I and Step II to guarantee simultaneous measurement; S4, processing data, and averaging the data measured by theflue gas analyzer in Step I; and S5, calculating a heat release rate of the combustion process based on an oxygen consumption principle. The method can directly measure and calculate the heat releaserate in the combustion process during a combustion test experiment; during calculation of the heat release rate, lagging of measured data is not required to be considered, so that the heat release rate can be measured conveniently and easily in real time.

The invention provides a double-layer drainage asphalt pavement quality detection method, comprising the following steps: step 1, sampling the asphalt mixture before pavement paving, burning to determine the amount of asphalt; sieving the remaining mineral materials after burning, and detecting the quality of the mixture Grading composition; Step 2, taking materials from the asphalt mixture on site, forming a Marshall test piece, and testing its performance indicators; Step 3, laying the asphalt mixture on the actual road surface, and sampling the road surface performance after the laying is completed Step 4: Carry out road surface core sampling in the detection road section, conduct industrial CT scanning on the core sample, and obtain the internal pore characteristics and spatial distribution of the core sample. The detection method of the present invention can timely and effectively monitor the deviation of material usage during construction, and provide timely feedback for mixing the mixture; at the same time, it can control the on-site construction link to ensure the construction quality; the test result is accurate and reliable, and it is a permeable asphalt concrete grade. Provide practical guidance for further optimization of configuration design.

The invention discloses a method for risk assessment and safety inspection and evaluation of atmospheric storage tanks, comprising the following steps: S1 screening storage tanks; S2 risk ranking: performing risk ranking on all storage tanks according to the RBI risk assessment results, and determining the need for key inspection and evaluation Key storage tanks and the corresponding detection methods for preliminary determination of key storage tanks based on evaluation results and site conditions; S3 testing key storage tanks; S4 solving storage tank problems: using finite element analysis to determine the anti-settlement stability and fatigue of key storage tanks life expectancy. First conduct RBI risk assessment on storage tanks, and perform risk ranking on all storage tanks to determine the key storage tanks that need to be inspected and evaluated, and then use acoustic emission detection or tank opening inspection methods to detect key storage tanks according to the characteristics of key storage tanks Carry out inspection and evaluation, and use finite element analysis to determine the anti-settling stability of key storage tanks.

The invention discloses a method for selecting field experts based on a citation network and a scientific research cooperation network. The method includes the following steps: firstly, based on the metadata information of the database, a scholar cooperation directed network model is constructed to generate a scholar cooperation network; secondly, based on the document citation information, a document citation model is constructed, self-citation interference is removed, and a scholar citation network is generated by linear mapping; and then , the scholar cooperation network and the scholar citation network are fused to generate a scholar relationship network; finally, the important nodes in the scholar relationship network are calculated and the community structure is divided, and the result is used as a list of selected experts. Based on scholars' academic activities and academic achievements, the present invention comprehensively considers the two criteria of academic ability evaluation and cooperation network quality evaluation, not only can quickly and accurately recommend corresponding experts, but also can identify experts' areas of expertise, and solve the problem of expert professional matching in existing selection methods. Accurate questions; intuitively reflect the importance of senior scholars in scientific research, and the selection of experts is more reasonable.

The invention relates to a full-size ventilation limited space combustion heat release rate measurement method, comprising the following steps: S1, selecting indoor smoke measurement points, based onthree-zone smoke stratification, arranging three smoke analyzer probes in each of the upper, middle and lower layers in a combustion space, and simultaneously measuring the concentration of carbon monoxide gas and carbon dioxide gas by a smoke analyzer; S2, arranging a smoke analyzer probe at a smoke outlet, and measuring the concentration of carbon dioxide gas by a smoke analyzer; S3, debugging the smoke analyzers in the S1 and S2 to ensure that the four smoke analyzer probes carry out measurement simultaneously; S4, processing data, namely averaging data about the concentration of carbon monoxide gas and carbon dioxide gas measured by the smoke analyzer in the S1; and S5, calculating the heat release rate of the combustion process based on the principle of carbon dioxide generation. Themethod does not need the complex processing, measurement and calculation process after burning smoke collection and can accurately and reliably measure the distribution of indoor smoke, and the calculation result is reliable.

The invention provides a measuring device and measuring method of the three-dimensional space distribution characteristic of a ship protective electric field. The measuring device of the three-dimensional space distribution characteristic of the ship protective electric field comprises data collection components, a parameter correction system and a data processing system. The data collection components comprise a support which is composed of three supporting rods in a mutually orthogonal mode, three accelerometers, three gyroscopes, three GPS receivers, six electric field measuring electrodes and a data collection storage device A, wherein a three-dimensional orthogonal coordinate system is formed by the support, the parts are installed on the support, sensitive axes of the three accelerometers coincide with coordinate axes where the accelerometers are located respectively, sensitive axes of the three gyroscopes are parallel to coordinate axes where the gyroscopes are located respectively, and every electric field measuring electrode in the positive direction and every electric field measuring electrode in the negative direction of each coordinate axis are symmetric about the origin of coordinates. The parameter correction system comprises four GPS receivers and a data collection storage device B. The data processing system carries out processing on collected parameters, and obtains the three-dimensional space distribution characteristic of the ship protective electric field.