Abstract: This application provides a passive inter-modulation source positioning method and an apparatus, and relates to the field of wireless communications technologies. The method includes: A network device sequentially performs a scanning process on each of a plurality of scanning spots by using the following steps: sending a plurality of downlink signals with different frequencies for a first scanning spot by using a transmit antenna, and receiving an uplink PIM signal for the first scanning spot by using a receive antenna, where the first scanning spot is any one of the plurality of scanning spots, and the uplink PIM signal is generated by excitation by any at least two of the plurality of downlink signals; and the network device determines a PIM source from the plurality of scanning spots based on uplink PIM signals respectively corresponding to the plurality of scanning spots.

Abstract: A class of halogensilane-functionalized carbonate electrolyte materials, a preparation method thereof and use in a lithium ion battery. The chemical structure is shown in formula 1, the compound containing a halogenosilane group and an organic carbonate group wherein the organic carbonate moiety contained in the molecular structure facilitates the dissociation and conduction of the lithium ions, and the organic silicon functional group can improve surface performance of the electrode and enhance interface performance of the material. The halogenosilane functionalized carbonate electrolyte materials can be used as a functional additive or a cosolvent for a lithium ion battery, and the electrolyte includes a lithium salt, a solvent with a high dielectric constant or an organic solvent with a low boiling point, and a compound with the chemical structure of formula 1. Such materials can also be used in other electrochemical energy storage devices.