Abstract: A method for determining a vacuum degree threshold is provided including: e acquiring the current altitude signal of a vehicle; when the current altitude signal is invalid, acquiring a vacuum degree threshold and a standard working time, which correspond to a historical altitude signal received by an electronic vacuum pump of the vehicle last time, the vacuum degree threshold includes a vacuum degree turn-on threshold value and a vacuum degree turn-off threshold; acquiring the actual working time of the vacuum degree threshold corresponding to the historical altitude signal of the electronic vacuum pump when the current working cycle is completed; and when the difference between the actual working time and the standard working time exceeds a preset range, updating, according to the difference, the vacuum degree threshold corresponding to the historical altitude signal, and taking the updated vacuum degree threshold as a target vacuum degree threshold of the next working cycle.

Abstract: The present disclosure provides a method and system for determining a pure electric available power and a vehicle, the method being applied to a vehicle including a fuel cell, the vehicle further including a battery pack and a motor, the fuel cell and the battery pack being electrically connected to the motor, wherein the method includes: monitoring a current travelling state of the vehicle and a current on-off state of the fuel cell; acquiring a maximum peak power outputted by the motor, a maximum output power of the battery pack and a starting-up power of the fuel cell; and according to the current travelling state, the current on-off state of the fuel cell, the maximum peak power, the maximum output power and the starting-up power, determining the pure electric available power.

Abstract: Optimizing program parameters in multithreaded programming may include: generating, for a program, a plurality of low-level metric functions, each of the low-level metric functions calculating a respective low-level metric of a plurality of low-level metrics; generating one or more high-level metric functions for one or more high-level metrics, each of the one or more high-level metric functions comprising a piecewise-rational function based on one or more of the low-level metric functions; and generate, based on the one or more high level-metric functions, one or more data parameter values and one or more hardware parameter values, one or more program parameter values for executing the program, wherein the one or more program parameter values are configured to optimize the one or more high-level metrics.

Abstract: Optimizing program parameters in multithreaded programming may include: generating, for a program, a plurality of low-level metric functions, each of the low-level metric functions calculating a respective low-level metric of a plurality of low-level metrics; generating one or more high-level metric functions for one or more high-level metrics, each of the one or more high-level metric functions comprising a piecewise-rational function based on one or more of the low-level metric functions; and generate, based on the one or more high level-metric functions, one or more data parameter values and one or more hardware parameter values, one or more program parameter values for executing the program, wherein the one or more program parameter values are configured to optimize the one or more high-level metrics.