Abstract: A switched capacitor converter includes a first energy storage branch, a second energy storage branch, a third energy storage branch comprising a third capacitor, a seventh switch, an eighth switch, a ninth switch and a tenth switch, and a control branch connected to a first terminal of each switch in the first energy storage branch, the second energy storage branch and the third energy storage branch respectively, wherein the control branch is configured to control each switch to alternately turn on and off periodically in two phases, so that a ratio of a voltage at the input terminal to a voltage at an output terminal is 2N:1, wherein in each operating cycle, the tenth switch is turned on later than at least one switch in the third energy storage branch, and wherein the at least one switch and the tenth switch are in a same phase.

Abstract: An input device includes at least one key structure and a film circuit board disposed below the key structure. The key structure includes a top cover, a plunger, a sleeve, a rod, a first elastic element, a second elastic element and a bottom cover. The plunger is assembled on the top cover and has a protruding portion protruding from a first opening of the top cover and a guiding portion. The sleeve is assembled inside the plunger. The rod is movably disposed in the sleeve. The first elastic element is disposed in the rod, wherein the guiding portion passes through the first elastic element so that a first end of the first elastic element leans against the plunger. The bottom cover having a second opening locks the top cover. A second end and a third end of the second elastic element respectively lean against the sleeve and the bottom cover.

Abstract: An input device includes at least one key structure and a film circuit board disposed below the key structure. The key structure includes a top cover, a plunger, a sleeve, a rod, a first elastic element, a second elastic element and a bottom cover. The plunger is assembled on the top cover and has a protruding portion protruding from a first opening of the top cover and a guiding portion. The sleeve is assembled inside the plunger. The rod is movably disposed in the sleeve. The first elastic element is disposed in the rod, wherein the guiding portion passes through the first elastic element so that a first end of the first elastic element leans against the plunger. The bottom cover having a second opening locks the top cover. A second end and a third end of the second elastic element respectively lean against the sleeve and the bottom cover.

Abstract: Methods and systems for acoustic data analysis are described. An example method includes obtaining digitized acoustic signals corresponding to acoustic signals collected by a logging tool deployed in a downhole environment. The method also includes providing a graphical user interface (GUI) that enables a user to view representations of the digitized acoustic signals and related coherence data. The method also includes receiving user-input regarding adjustment and inversion options for the digitized acoustic signals via a menu of the GUI. The method also includes deriving a shear slowness log for the downhole environment in accordance with the received user-input.

Abstract: In some embodiments, a method acquires acoustic data with a receiver. The acoustic data is provided by a down hole tool, comprising the receiver, that can move within a borehole in a geological formation. Quality control workflow charts, representing selected acoustic data related to the down hole tool, the geological formation, and/or the borehole can be displayed, transformation controlled, and analyzed on a monitor. The quality control workflow charts comprise the selected acoustic data and/or transformed versions of signal waveforms of the selected acoustic data.

Abstract: A high temperature test system is adapted for testing a device under test (DUT) under a high temperature environment. The high temperature test system includes a preheating unit, a first moving unit, a testing unit, and a second moving unit. The preheating unit is adapted for preheating the DUT. The first moving unit is adapted for removing the preheated DUT from the preheating unit. The testing unit is adapted for placement of the DUT removed by the first moving unit, for testing the DUT, and for providing the high temperature environment to the DUT during testing. The second moving unit is adapted for removing the DUT that has passed testing from the testing unit.