Railway track irregularity potential disease identification method based on feature clustering

The invention relates to the technical field of railway track irregularity disease identification, in particular to a railway track irregularity potential disease identification method based on feature clustering, and the method comprises the following steps: S1, integrating track irregularity historical dynamic detection data of a target section; s2, establishing a track irregularity potential disease identification index system; s3, extracting a disease identification index value from the historical dynamic detection data; s4, standardizing the disease identification index value to obtain a to-be-clustered sample data set; s5, based on a k-means + + algorithm, calculating a KL clustering index of the sample data set; s6, judging whether diseases exist in the target section or not, if not, prompting that no diseases exist, and if yes, executing S7; and S7, classifying the sample data set into two classes, extracting position information of abnormal samples, and marking and completing potential ...

Method for evaluating fine smashing scheme of operating ordinary-speed railway based on multi-factor constraint

A multi-factor constraint-based evaluation method for a fine tamping scheme of an operating ordinary-speed railway comprises the following steps of: comprehensively comparing line flat and vertical section parameters before and after section reconstruction design of the fine tamping scheme, judging whether a flat and vertical section reconstruction design result meets a limit value requirement, and ensuring the reasonability of the flat and vertical section design parameters; according to the method, irregularity of a target line shape under different detection chord lengths is evaluated, the driving power performance of the target line shape is evaluated, the smoothness of the optimized target line shape is ensured, the track starting and lining amount, the change rate and the proportion of a fine tamping scheme are considered, the feasibility of the scheme is evaluated, and it is ensured that the adjustment amount of the fine tamping scheme conforms to tamping operation characteristics ...

Plane coordinate measurement data overlapping method and system for operating ordinary-speed railway

A plane coordinate measurement data lap joint method for operating a general speed railway comprises the steps that plane coordinate measurement data in a lap joint area and within a certain distance between the two ends are screened, the screened plane coordinate measurement data are sorted according to the line trend, and therefore measurement data selection of a local reconstruction design area is completed; according to plane coordinate measurement data in the local reconstruction design area, completing local linear reconstruction design, and calculating plane deviation of two times of measurement data in the lap joint area; the plane deviation difference of the two-time measurement data in the lap joint area is calculated, and whether the two-time measurement data meet the lap joint precision requirement or not is judged according to the calculation result of the plane deviation difference; when the two-time plane coordinate measurement data in the lap joint area meet the lap joint ...

Poly-butylene terephthalate/laminated nm-silicate composite material and its preparing process

A nm-class composition of poly butylene terephthalate and lamitated silicate is prepared through copolycondensation of laminated silicate after insertion reaction on polybutylene terephthalate monomer. Said composition with high properties features that laminated silicate is combined with polyester via chemical bonds and uniformly dispersed in the polyester by nm-class size. Its advantages include comparable production cost, high temp resistance, high modulus and very good machining nature.

Multi-control-point combined MLS measurement precision correction method

The invention provides a method for jointly correcting MLS measurement precision through multiple control points. The method comprises the steps that a positioning error value is calculated based on IMU and odometer combined dead reckoning and control point back calculation; the positioning error value is converted into a virtual control point mileage coordinate system, a gyroscope zero offset error circle is solved through a multi-control-point overall adjustment method, and a speedometer scale factor is estimated; calculating the gyroscope zero offset based on the gyroscope zero offset error circle and the running speed of the detection equipment; the pose of the revised trajectory is reckoned based on the gyro zero offset and the odometer scale factor. According to the method, main error terms influencing positioning during dead reckoning of the IMU/odometer, namely the gyro zero offset and the odometer scale factor, are determined, and the high-precision characteristic of a control ...

Compoiste poly(dibutyl terephthalate)/layer silicate nm-material and preparing process thereof

Railway Beidou base station control network automatic updating and maintaining method and system

The invention discloses an automatic updating and maintaining method and system for a railway Beidou base station control network, and the method comprises the following steps: receiving the observation data of a base station, decoding the observation data, cutting the data at equal time intervals, storing the data in a local disk, and carrying out the format conversion at regular time; calling the database after format conversion; synchronous observation data and ephemeris data of the two reference stations needing baseline solution are used for conducting three-difference preprocessing, double-difference floating point solution, double-difference ambiguity fixing and fixed solution back calculation of a baseline; a repeated baseline, a synchronous ring and an independent closed ring are established for detection, and an unconstrained network detection result is automatically generated after a baseline vector meets the requirement; resolving all base line vectors passing the test in the ...