Abstract: Methods and devices for IQ time skew and conjugation compensation and calibration of a coherent transmitter or transceiver are described. A pilot tone is combined with a digital data signal such that relative powers of the pilot tone in each of two frequency bands of the transmitted data signal may be detected by a pilot tone detector and used to calculate the time skew between I and Q modulation channels of the transmitter. A transmitter DSP applies IQ time skew bias to the data signal to compensate for any calculated IQ time skew. The pilot tone detector also provides the transmitter DSP with the information necessary to detect phase conjugation of the optical signal, which can be corrected by inverting the polarity of the data signal or changing the phase bias point of the optical modulator.

Abstract: The present disclosure discloses a trailer braking control method and system based on an electric brake controller. A lateral displacement and speed of a vehicle are acquired first; whether the vehicle has Death Wobble and a degree of the Death Wobble are then determined according to the lateral displacement; if there is Death Wobble, a driving state of the vehicle is determined according to the speed; and finally, a set voltage is added based on a set output voltage according to the degree of the Death Wobble and the driving state, so as to brake the vehicle. The present disclosure avoids setting of a weight ratio in the prior art to prevent the phenomenon of Death Wobble, and can identify and prevent the phenomenon of Death Wobble of a trailer, thereby avoiding an overturning accident and ensuring the personal safety and the integrity of a vehicle.

Abstract: Systems and methods for In-phase and Quadrature modulation. The method includes i) processing In-phase digital signals and Quadrature digital signals and generating PT modulated In-phase analog signals and PT modulated Quadrature analog signals, ii) receiving an optical signal, iii) modulating the optical signal in accordance with the PT modulated In-phase analog signals and the PT modulated Quadrature analog signals and generate PT modulated In-phase optical signals and PT modulated Quadrature optical signals, iv) biasing the PT modulated In-phase optical signals and the PT modulated Quadrature optical signals to a null point, v) adjusting a phase bias point of the PT modulated Quadrature optical signals and generating phase adjusted PT modulated Quadrature optical signals, and vi) combining the PT modulated In-phase optical signals and phase adjusted PT modulated Quadrature optical signal and generate a combined PT modulated optical signal to be transmitted towards a receiver.

Abstract: The present disclosure relates to a wireless communication system and communication method for a cableless detection robot for a gas pipeline. The wireless communication system includes an antenna assembly, a repeater assembly and a repeater retracting device, wherein the antenna assembly is fixed to the gas pipeline and extends into the interior of the gas pipeline, the repeater assembly is provided with at least one set, and the repeater retracting device is connected to the robot and used for retracting the repeater assembly along the gas pipeline, the antenna assembly, the repeater assembly and the robot are connected through a wireless signal having a wavelength less than 3.41r, wherein r represents the radius of the gas pipeline.

Abstract: Methods and devices for IQ time skew and conjugation compensation and calibration of a coherent transmitter or transceiver are described. A pilot tone is combined with a digital data signal such that relative powers of the pilot tone in each of two frequency bands of the transmitted data signal may be detected by a pilot tone detector and used to calculate the time skew between I and Q modulation channels of the transmitter. A transmitter DSP applies IQ time skew bias to the data signal to compensate for any calculated IQ time skew. The pilot tone detector also provides the transmitter DSP with the information necessary to detect phase conjugation of the optical signal, which can be corrected by inverting the polarity of the data signal or changing the phase bias point of the optical modulator.

Abstract: An apparatus for selling cigarettes and a system for accessing cigarettes are described herein. The apparatus comprises a vending machine and a smoke purification system. The smoke purification system includes a housing, an extraction device, a smoke purifier, and an exhaustion device. An upper face of the housing is provided with an air inlet for sucking in air in an upper space of a smoking room, and a front face of the housing is provided with a fresh air outlet. An intake port of the extraction device is coupled with the air inlet, an escape port of the exhaustion device is coupled with the fresh air outlet through an exhaust channel, and two ends of the smoke purifier are coupled with an escape port of the extraction device and an intake port of the exhaustion device, respectively.

Abstract: An apparatus for selling cigarettes and a system for accessing cigarettes are described herein. The apparatus comprises a vending machine and a smoke purification system. The smoke purification system includes a housing, an extraction device, a smoke purifier, and an exhaustion device. An upper face of the housing is provided with an air inlet for sucking in air in an upper space of a smoking room, and a front face of the housing is provided with a fresh air outlet. An intake port of the extraction device is coupled with the air inlet, an escape port of the exhaustion device is coupled with the fresh air outlet through an exhaust channel, and two ends of the smoke purifier are coupled with an escape port of the extraction device and an intake port of the exhaustion device, respectively.

Abstract: The present disclosure relates to a wireless communication system and communication method for a cableless detection robot for a gas pipeline. The wireless communication system includes an antenna assembly, a repeater assembly and a repeater retracting device, wherein the antenna assembly is fixed to the gas pipeline and extends into the interior of the gas pipeline, the repeater assembly is provided with at least one set, and the repeater retracting device is connected to the robot and used for retracting the repeater assembly along the gas pipeline, the antenna assembly, the repeater assembly and the robot are connected through a wireless signal having a wavelength less than 3.41r, wherein r represents the radius of the gas pipeline.

Abstract: A primary heating band is applied to a weld to control a microstructure and hardness of the weld and uniformity of the structure to realize micro-control of the residual stress; an auxiliary heating band is applied a certain distance away from the weld to generate compressive stress on an inner surface of the weld to realize macro-control of the compressive stress. Reinforcement with a rib plate is eliminated, and a labor intensity and a construction period are reduced. The method reduces deformation near the weld and transfers the largest deformation to a non-weld zone; by applying the auxiliary heating and strictly controlling a time interval between primary heating and auxiliary heating, the structure is improved and the welding residual stress is controlled at the same time; a local heat treatment effect is optimized, and a small tensile stress or compressive stress is generated on the inner surface of the weld.

Abstract: A primary heating band is applied to a weld to control a microstructure and hardness of the weld and uniformity of the structure to realize micro-control of the residual stress; an auxiliary heating band is applied a certain distance away from the weld to generate compressive stress on an inner surface of the weld to realize macro-control of the compressive stress. Reinforcement with a rib plate is eliminated, and a labor intensity and a construction period are reduced. The method reduces deformation near the weld and transfers the largest deformation to a non-weld zone; by applying the auxiliary heating and strictly controlling a time interval between primary heating and auxiliary heating, the structure is improved and the welding residual stress is controlled at the same time; a local heat treatment effect is optimized, and a small tensile stress or compressive stress is generated on the inner surface of the weld.

Abstract: A method of manufacture of an integrated circuit packaging system includes: providing an interposer having an interposer bottom side and an interposer top side; attaching a base integrated circuit to the interposer bottom side; attaching a lead to the interposer bottom side, the lead adjacent the base integrated circuit and entirely below the interposer; and forming an encapsulation partially covering the lead and exposing the interposer top side.

Abstract: A method of manufacture of an integrated circuit packaging system includes: providing an interposer having an interposer bottom side and an interposer top side; attaching a base integrated circuit to the interposer bottom side; attaching a lead to the interposer bottom side, the lead adjacent the base integrated circuit and entirely below the interposer; and forming an encapsulation partially covering the lead and exposing the interposer top side.

Abstract: A method of manufacture of an integrated circuit package stacking system includes: providing a bottom package including: providing a first lead frame, forming a bottom package body having the first lead frame in an off-centered parting line position, and forming bottom connection leads of the first lead frame for providing coplanar contacts at an end of the bottom connection leads; mounting a top package on the bottom package including: providing a second lead frame, forming a top package body on the second lead frame, and reforming top connection leads of the second lead frame for over-lapping contact areas on the bottom connection leads of the bottom package; and applying a conductive adhesive on the contact areas for electrically connecting the top connection leads and the bottom connection leads.

Abstract: An integrated circuit package system includes providing an integrated circuit die having planar dimensions; forming a lead extended across one of the planar dimensions of the integrated circuit die; and applying an adhesive layer over the lead of a side opposite the integrated circuit die.