Abstract: A method and system for monitoring a rail vehicle are provided. The method includes: a local device acquires current operating data and historical operating data of a rail vehicle from a controller of the rail vehicle, herein the local device, which is connected with the controller, is a portable testing device; the local device obtains fault information according to the current operating data and the historical operating data, herein the fault information includes at least one of a fault code and a fault description; the local device obtains a maintenance plan corresponding to the fault information, herein the maintenance plan is obtained through a remote device or a server side; and the local device maintains the rail vehicle according to the maintenance plan. The disclosure solves a technical problem in the traditional art that a troubleshooting process of a rail vehicle is difficult, and when the rail vehicle has a fault, the fault cannot be solved timely.

Abstract: A method and system for monitoring a rail vehicle are provided. The method includes: a local device acquires current operating data and historical operating data of a rail vehicle from a controller of the rail vehicle, herein the local device, which is connected with the controller, is a portable testing device; the local device obtains fault information according to the current operating data and the historical operating data, herein the fault information includes at least one of a fault code and a fault description; the local device obtains a maintenance plan corresponding to the fault information, herein the maintenance plan is obtained through a remote device or a server side; and the local device maintains the rail vehicle according to the maintenance plan. The disclosure solves a technical problem in the traditional art that a troubleshooting process of a rail vehicle is difficult, and when the rail vehicle has a fault, the fault cannot be solved timely.

Abstract: The present invention discloses the application of aptamer in recognition and binding of alkaline phosphatase heterodimer. The present invention provides an aptamer or its derivative, the nucleotide sequence of which is shown in SEQ ID NO: 1 in the sequence listing. The present invention also provides a kit including an aptamer or a derivative thereof, and a carrier for fixing or coupling the aptamer or a derivative thereof, wherein the aptamer is a single-stranded DNA molecule having the nucleotide sequence as shown in SEQ ID NO: 1. The method for capturing and detecting circulating tumor cells, exosomes and free alkaline phosphatase in peripheral blood highly expressing alkaline phosphatase based on the aptamer magnetic nanoparticle technology of the present invention can achieve highly selective capture and detection of target cells, exosomes or free proteins.