Abstract: Provided are a cold start method and apparatus of a global positioning system (GPS) module of a terminal, a terminal and a storage medium. The method includes acquiring (S110) target position information of the terminal; selecting (S120), according to the target position information, an ephemeris data record whose position information matches the target position information from a preset satellite visible window table to obtain a target record set; selecting (S130) N satellites according to the ephemeris data record in the target record set to form a visible satellite list, where N is an integer greater than or equal to 4; and positioning (S140) according to the satellites in the visible satellite list.

Abstract: The present disclosure relates to a traceable in-situ micro- and nano-indentation testing instrument and method under variable temperature conditions. A macro-micro switchable mechanical loading module, a nano mechanical loading module and an indentation position optical positioning module are fixed on a gantry beam, an optical imaging axis of an optical microscopic in-situ observation or alignment module and a loading axis of the nano mechanical loading module are coplanar, the optical microscopic in-situ observation or alignment module and the function switchable module are mounted on a table top of a marble pedestal, and a contact or ambient mixed variable temperature module is fixedly mounted on the function switchable module. A modular design is adopted, the micro- and nano-indentation testing instrument is used as a core, in combination with a multi-stage vacuum or ambient chamber, an indentation depth traceability calibration module and multiple sets of optical microscopic imaging assemblies.

Abstract: Provided are a cold start method and apparatus of a global positioning system (GPS) module of a terminal, a terminal and a storage medium. The method includes acquiring (S110) target position information of the terminal; selecting (S120), according to the target position information, an ephemeris data record whose position information matches the target position information from a preset satellite visible window table to obtain a target record set; selecting (S130) N satellites according to the ephemeris data record in the target record set to form a visible satellite list, where N is an integer greater than or equal to 4; and positioning (S140) according to the satellites in the visible satellite list.

Abstract: The present disclosure relates to a traceable in-situ micro- and nano-indentation testing instrument and method under variable temperature conditions. A macro-micro switchable mechanical loading module, a nano mechanical loading module and an indentation position optical positioning module are fixed on a gantry beam, an optical imaging axis of an optical microscopic in-situ observation or alignment module and a loading axis of the nano mechanical loading module are coplanar, the optical microscopic in-situ observation or alignment module and the function switchable module are mounted on a table top of a marble pedestal, and a contact or ambient mixed variable temperature module is fixedly mounted on the function switchable module. A modular design is adopted, the micro- and nano-indentation testing instrument is used as a core, in combination with a multi-stage vacuum or ambient chamber, an indentation depth traceability calibration module and multiple sets of optical microscopic imaging assemblies.

Abstract: An LED light source is described herein, which comprises: a hollow heat sink having a top wall, a bottom opening, and a sidewall, the top wall including an upper surface and a lower surface, the upper surface having a central area and a peripheral area, and the top wall having at least one first hole in the peripheral area; an interposer being overmolded on the peripheral area and the lower surface, and extending through the at least one first hole; an LED package comprising at least one LED chip and mounted in the central area; an LED driver located within the hollow heat sink and positioned on a side of the interposer facing the bottom opening.

Abstract: An LED light source is described herein, which comprises: a hollow heat sink having a top wall, a bottom opening, and a sidewall, the top wall including an upper surface and a lower surface, the upper surface having a central area and a peripheral area, and the top wall having at least one first hole in the peripheral area; an interposer being overmolded on the peripheral area and the lower surface, and extending through the at least one first hole; an LED package comprising at least one LED chip and mounted in the central area; an LED driver located within the hollow heat sink and positioned on a side of the interposer facing the bottom opening.

Abstract: Provided are a data transmission method and device. The method includes: searching in a routing table for one or more available data transmission paths between a data sending terminal and a data receiving terminal, wherein the routing table contains currently available data transmission paths between various terminals, and the data transmission paths are data transmission paths established between the various terminals by using at least one wireless communication protocol; and transmitting data required to be sent by the data sending terminal to the data receiving terminal according to the one or more found data transmission paths. The technical solution effectively solves the problem of transmission distance and transmission protocol restrictions in the related art when a terminal transmits data in real time via wireless techniques, thus increasing wireless transmission distance, and facilitating user data transmission and sharing.