Abstract: A voltage regulator system, comprising: a switched capacitor (SC) regulator that operates at a switching frequency and receives an input voltage; and a controller configured to control an operation of the SC regulator by adjusting the switching frequency of the SC regulator based on efficiency. In some embodiments, the switching frequency is swept to determine a best efficiency. In some embodiments, the switching frequency is swept at each of a plurality of values for the input voltage. In some embodiments, the system includes further one or more switches in series with the SC regulator. In some embodiments, the SC regulator includes an output terminal that is coupled to a battery.

Abstract: Voltage regulator systems include, in part, a regulator comprising an input terminal and an output terminal, wherein the regulator is configured to receive an input voltage from an adapter at the input terminal and provide an output voltage at the output terminal, wherein the regulator comprises at least one switched capacitor regulator operating in a first conversion mode corresponding to a first conversion factor. The voltage regulator systems also include a controller configured to control an operation of the regulator, wherein the controller is configured to determine when a conversion ratio of the regulator is greater than the first conversion factor, and, in response, to send a request to the adapter to decrease the input voltage.

Abstract: A double-tilt in-situ nanoindentation platform for TEM (transmission electron microscope) belongs to the field of in-situ characterization of the mechanical property-microstructure relationship of materials at the nano- and atomic scale. The platform is consisted of adhesive area, support beams, bearing beams, sample loading stage and mini indenter. The overall structure of the platform is prepared by semiconductor microfabrication technology. The in-situ nanoindentation experiment can be driven by bimetallic strip, V-shaped electro-thermal beam, piezoelectric ceramics, electrostatic comb or shape memory alloys et. al. The sample is obtained by focused ion beam cutting. The integrated platform can be placed in the narrow space on the front end of the TEM sample holder, giving rise to the condition of double-axis tilt. The driving device drives the mini indenter to carry out in-situ nanoindentation, in-situ compression and in-situ bending and the like of the materials in TEM.

Abstract: The present invention provides an air tightness detection device for an aluminum alloy wheel hub, which is characterized by precision air pressure sensors, a lower clamp, a cone cylinder pressure plate, air pipes, a pressure plate, guide posts, an air inlet pipe, and a compressed gas control and detection system. A technical solution of the present invention has the following advantages that the cone cylinder pressure plate of the detection device reduces the space of an inner cavity of the wheel hub to further reduce inflating volume, thereby increasing detection efficiency; the characteristics of readily availability for preparation, no pollution and low cost are achieved by taking compressed air as a leakage indication gas.

Abstract: Embodiments of the disclosure provide an ice crushing device and refrigerator The ice crushing device comprises an ice storage container, in which a rotatable ice knife assembly is provided, wherein the ice knife assembly includes a rotary shaft, a fixed ice knife, a movable ice knife and an ice cube separation structure, the rotary shaft is capable of driving the movable ice knife to rotate, the fixed ice knife and the ice cube separation structure are located at two sides of the rotary shaft separately, and the fixed ice knife and the ice cube separation structure are both fixed relative to the ice storage container.

Abstract: A double-tilt in-situ mechanical sample holder for TEM based on piezoelectric ceramic drive belongs to the field of material microstructure-mechanical properties in-situ characterization, and it comprise two parts of sample holder shaft body and piezoelectric ceramic drive system. The sample holder shaft body comprise tilt stage, sample holder, linear stepping motor, drive rod, drive linkage. The piezoelectric ceramic drive system comprise piezoelectric ceramic loading stage, piezoelectric ceramic, connecting base and the sample loading stage realizing stretch or compression function. The double-axis tilt of the samples in X and Y axis directions is realized by the reciprocating motion back and forth of the drive rod driven by the linear stepping motor. The stretch or compression of the samples is realized by applying voltage on the piezoelectric ceramic to generate displacement and push the sample loading stage by the connecting base.

Abstract: A double-tilt sample holder for TEM, comprising: it comprise the main body of sample holder body, front-end tilt stage, drive rod, linkage, tilt axis, rotation axis, fixed axis of drive rod and sample loading stage. The axis hole is arranged at the front-end tilt stage, which is connected to the main body of the sample holder body by the tilt axis. The linkage, the boss slot and the drive rod slot are connected by the rotation axis. Two through movement guide grooves are designed symmetrically at both sides of the front-end of sample holder body, and the drive rod is fixed by the fixed axis of the drive rod, which restricts the drive rod to move reciprocally in a straight line driven by the linear stepping motor at the back-end of the main body of the holder body, further leading the tilt stage to rotate around the tilt axis. The tilt angle of the sample loading stage can be precisely controlled by the high precision linear stepping motor in the apparatus.

Abstract: A magnetic read apparatus has a media-facing surface (MFS) and includes a read sensor, a magnetic bias structure and an insulating layer. The read sensor has a side, a front occupying part of the MFS and a back. The read sensor includes a free layer, a pinned layer and a barrier layer between the free and pinned layers. The barrier layer has a barrier layer coefficient of thermal expansion. The magnetic bias structure is adjacent to the side of the free layer. The insulating layer includes first and second portions. The first portion of the insulating layer is between the read sensor side and the magnetic bias structure. The second portion of the insulating layer adjoins the read sensor back. The insulating layer has an insulating layer coefficient of thermal expansion that is at least ? of and not more than 5/3 of the barrier layer coefficient of thermal expansion.

Abstract: Digital compensators for use in outphasing-based power amplification systems (e.g., Linear Amplification using Nonlinear Components (LINC) amplifiers and Asymmetric Multilevel Outphasing (AMO) amplifiers) include a short memory nonlinear portion and a long memory linear time invariant (LTI) portion. In various embodiments, compensators are provided that are of relatively low complexity and that are capable of operation at throughputs exceeding a Gigasample per second.

Abstract: The present invention provides a device for measuring air tightness of an aluminum alloy hub or a tyre and a method for measuring the air tightness of the aluminum alloy hub or the tyre by using the device. The device includes a pressure measurement device mounted into a hub or tyre to be measured, an inflation device in gas connection with an inside of a tyre of a wheel to be measured, and a data acquiring and processing device; wherein the inflation device includes a flow measurement component.

Abstract: A magnetic read apparatus has an air-bearing surface (ABS) and includes a shield, a crystal decoupling structure on the shield and a read sensor on the crystal decoupling structure. The crystal decoupling structure includes at least one of a magnetic high crystalline temperature amorphous alloy layer and a combination of a high crystalline temperature amorphous layer and an amorphous magnetic layer. The high crystalline temperature amorphous layer has a crystalline temperature of at least three hundred degrees Celsius. The amorphous magnetic layer is amorphous as-deposited.

Abstract: A rotatory energy recycling control device for a hydraulic excavator, comprising: an oil line selector valve (1), a direction selector valve (2), a sequencing valve (3), a one-way valve (4) and an overflow valve (5); two oil inlets of the oil line selector valve (1) are respectively connected to an opening A and an opening B of a rotary motor; an oil outlet of the oil line selector valve (1) is connected to an inlet of the direction selector valve (2); an outlet of the direction selector valve (2) is connected to an net of the sequencing valve (3); a drainage port of the sequencing valve (3) is connected to an oil tank; an outlet of the sequencing valve (3) and an net of the one-way valve (4) communicate with the overflow valve (5): the outlet of the one-way valve (4) is connected to an energy storage and utilization device; and an outlet of the overflow valve (5) is connected to the oil tank.

Abstract: The present invention provides an air tightness detection device for an aluminum alloy wheel hub, which is characterized by precision air pressure sensors, a lower clamp, a cone cylinder pressure plate, air pipes, a pressure plate, guide posts, an air inlet pipe, and a compressed gas control and detection system. A technical solution of the present invention has the following advantages that the cone cylinder pressure plate of the detection device reduces the space of an inner cavity of the wheel hub to further reduce inflating volume, thereby increasing detection efficiency; the characteristics of readily availability for preparation, no pollution and low cost are achieved by taking compressed air as a leakage indication gas.

Abstract: Described herein is a fixed-point piece-wise linear (FP PWL) approximation technique for computations of nonlinear functions. The technique results in circuit designs having relatively few and simple arithmetic operations, short arithmetic operands and small-sized look-up tables and the circuits resultant there from can be efficiently pipelined to run at multi-GSamples/s throughputs. In one exemplary embodiment, the FP PWL approximation technique was used in the design of an energy-efficient high-throughput and high-precision signal component separator (SCS) for use with in an asymmetric-multilevel-outphasing (AMO) power amplifier. The FP PWL approximation technique is appropriate for use in any application requiring high-throughput, area and power constrained hardware implementations of nonlinear functions.

Abstract: Digital compensators for use in outphasing-based power amplification systems (e.g., Linear Amplification using Nonlinear Components (LINC) amplifiers and Asymmetric Multilevel Outphasing (AMO) amplifiers) include a short memory nonlinear portion and a long memory linear time invariant (LTI) portion. In various embodiments, compensators are provided that are of relatively low complexity and that are capable of operation at throughputs exceeding a Gigasample per second.

Abstract: Described herein is a fixed-point piece-wise linear (FP PWL) approximation technique for computations of nonlinear functions. The technique results in circuit designs having relatively few and simple arithmetic operations, short arithmetic operands and small-sized look-up tables and the circuits resultant there from can be efficiently pipelined to run at multi-GSamples/s throughputs. In one exemplary embodiment, the FP PWL approximation technique was used in the design of an energy-efficient high-throughput and high-precision signal component separator (SCS) for use with in an asymmetric-multilevel-outphasing (AMO) power amplifier. The FP PWL approximation technique is appropriate for use in any application requiring high-throughput, area and power constrained hardware implementations of nonlinear functions.

Abstract: An apparatus and method for load sharing among N current supplies, where N>1. N current supply paths are coupled to corresponding N independent power sources, respectively. A system load is coupled to the outputs of the N current supply paths to receive N current supplies. There is a common current share bus configured to connect to the N current supply paths to provide a common current share signal, used to indicate the current contribution needed from each of the N current supply paths. In this configuration, each of the N current supply paths adjusts an adjustable voltage drop between its power source and the current supply it provides to the system load in accordance with the common current share signal so that the current supplied from each current supply path is consistent with the common current share signal.

Abstract: An apparatus and method for load sharing among N current supplies, where N>1. N current supply paths are coupled to corresponding N independent power sources, respectively. A system load is coupled to the outputs of the N current supply paths to receive N current supplies. There is a common current share bus configured to connect to the N current supply paths to provide a common current share signal, used to indicate the current contribution needed from each of the N current supply paths. In this configuration, each of the N current supply paths adjusts an adjustable voltage drop between its power source and the current supply it provides to the system load in accordance with the common current share signal so that the current supplied from each current supply path is consistent with the common current share signal.