5results about How to "Long test time" patented technology

The invention discloses a ground test hydrogen-oxygen rocket engine mixing ratio control system which comprises a liquid hydrogen storage tank, a hydrogen cavitation pipe, a liquid oxygen storage tank, an oxygen cavitation pipe, a combustion device, a gas nozzle, a liquid hydrogen storage tank pressure control system and a liquid oxygen storage tank pressure control system. Wherein the liquid hydrogen storage tank is connected with the liquid hydrogen storage tank pressure control system through a pipeline; the liquid oxygen storage tank is connected with the liquid oxygen storage tank pressure control system through a pipeline; the liquid hydrogen storage tank is connected with an inlet of the hydrogen cavitation pipe through a pipeline, and an outlet of the hydrogen cavitation pipe is connected with a hydrogen inlet of the combustion device through a pipeline; the liquid oxygen storage box is connected with an inlet of the oxygen cavitation pipe through a pipeline, and an outlet of the oxygen cavitation pipe is connected with an oxygen inlet of the combustion device through a pipeline. An outlet of the combustion device is connected with an inlet of the gas nozzle through a pipeline, and an outlet of the gas nozzle directly discharges gas outwards. The purposes of controlling the mixing ratio and prolonging the test duration are achieved, meanwhile, the safety of the engine and the test device is guaranteed, and the test cost is reduced.

This invention relates to a method, apparatus, and system for optimizing the sensitivity, extinction ratio, and EMI of long-distance optical modules. The method mainly includes: detecting the output sensitivity of the optical module at different temperatures; compensating and adjusting the voff voltage based on the sensitivity shift at different temperatures; after compensating and adjusting the voff voltage, compensating and adjusting the bias current based on the optical power shift at different temperatures; detecting the output extinction ratio of the optical module at different temperatures; compensating and adjusting the Vmod voltage based on the extinction ratio shift at different temperatures; detecting the EMI of the optical module at different temperatures; if the EMI is unqualified, compensating and adjusting the Vmod voltage; if the EMI is still unqualified after multiple compensation and adjustments of the Vmod voltage, compensating and adjusting the RX amplitude voltage and RX pre-emphasis voltage to ensure that the sensitivity, extinction ratio, and EMI of the optical module are all qualified. This invention can optimize the sensitivity and extinction ratio of the optical module to the optimal value at various temperatures while ensuring EMI compliance.

The application relates to the technical field of elevators, in particular to an on-site access control cabinet test method, system, equipment and medium. The application simulates the main control board layout through a jig board, establishes a connection with a card reader, an electric lock and a door magnetic interface of the access control cabinet by using a probe array, first carries out low-voltage conductivity test, impedance test and voltage reference calibration to obtain preliminary results; after the pre-check passes, the control cabinet is connected with an actual elevator main board to carry out function verification and system joint debugging to obtain second-stage test results; then the system analyzes the test data, identifies abnormal interface positions and fault types, and accurately broadcasts fault information and terminal identification through a voice system; the layered test mechanism avoids the risk of main board damage, the multi-channel concurrent test improves the efficiency, the voice guidance realizes rapid positioning, the safety hidden danger in the traditional test is effectively solved, and the accuracy and the standardization level of the test are improved.

The invention relates to marker for health assessment, and application thereof, and belongs to the field of medical examination. Use of a reagent for identifyi Male marker in manufacture of a reagent for detecting a health status of a mammal, comprising: Female detecting the marker in a sample of a subject, wherein the marker is a level of 8-oxoGsn; (2) comparing the marker with a reference, wherein a difference of the marker compared to the reference is used to evaluate the health status of the subject. The present invention adopts a simple clinical physical examination method to conduct a comprehensive health status assessment on the subject, can timely and quickly grasp people's health status and health rules, can be used in the field of health service management for sub-health detection and early warning, disease treatment and effect observation, and detection of psychological and emotional state, and has significant advantages over conventional medical detection methods.

The application discloses a test system and a test method of a rail transit signal system. The test system is used for testing a first rail transit signal system, and comprises a second rail transit signal system and a virtual trackside simulation device. The virtual trackside simulation device is used for simulating the state of a trackside device. In a first test mode, the first rail transit signal system sends a device operation instruction to the virtual trackside simulation device, receives a first simulated trackside device state fed back by the virtual trackside simulation device, and obtains train position information of a first train in a real line. In a second test mode, the first rail transit signal system runs in parallel with the second rail transit signal system based on a running plan of the second rail transit signal system, drives the virtual trackside simulation device to simulate the running of a real trackside device, obtains a second simulated trackside device state, and collects train running data of a second train and real state information of the real line.