Zte Corporation

Tencent Technology (Shenzhen) Company Limited

Johnson Electric International Ag

Huawei Technologies Co., Limited

Hong Yi

Yue Li

Yong Qing Wang

Min Li

Xiao Zhang

Chui You Zhou

Hai Jun Wang

Jianhong Chen

Juan Zhang

Kok Ang Chong

Moola Mallikarjuna Reddy

Jianhua Chen

Yong Gang Zhang

Jiabin Wang

Yuanhai Luo

A device extracts a plurality of characteristics from a sample set. For each extracted characteristic, the device determines different types of advertisements carried in advertisement samples in the sample set matching the characteristic. The device determines characteristic values of the characteristic that correspond to the different types of advertisements. The device filters based on characteristic values of the characteristic that correspond to the different types of advertisements, the extracted plurality of characteristics to obtain respective advertisement characteristics of the different types of advertisements. The device matches the advertisement characteristics of the different types of advertisements against characteristics extracted from a to-be-detected sample, and determines whether the to-be-detected sample carries an advertisement, and if so, which type of advertisement.

Advertisement detection method, advertisement detection apparatus, and storage medium

A stator includes a stator core including stator poles and a yoke connecting the stator poles, at least one winding wound around the stator core and connecting terminals configured to connect with an external power source to supply power to the winding and located at one end of the yoke adjacent the stator poles. A single phase motor and a ventilation fan are also provided.

Stator, single phase motor and fan

The present invention provides a method and an apparatus for controlling a phase delay offset point of a modulator. The method comprises: acquiring backlight detection current signals output from a modulator in different working states, and determining harmonic amplitude values of the backlight detection current signals corresponding to the different working states; determining a detection value of a phase delay offset point corresponding to the modulator according to the determined harmonic amplitude values; comparing the detection value with a set target value of the phase delay offset point, and controlling a position of the phase delay offset point corresponding to the modulator according to the comparison result. The accuracy of controlling the position of the phase delay offset point of the modulator and the performance of the Differential Quadrature Phase Shift Keying (DQPSK) modulation system are improved through the technical solution.

Method and apparatus for controlling phase delay offset point of modulator

Method and apparatus for controlling bias point of DQPSK demodulator are disclosed. The method comprises: step 1: respectively applying first and second bias voltages to I-path and Q-path, and applying identical pilot voltage signals to I-path and Q-path (S); step 2: executing filtering processing on I-path and Q-path differential current signals collected by balance receiver and determining &#x3b8;and &#x3b8;(S); step 3: performing feedback control to first and second bias voltages respectively according to &#x3b8;and &#x3b8;so that &#x3b8;and &#x3b8;respectively reaches expected bias point values of I-path and Q-path (S); executing step 2 and 3 cyclically at preset regular intervals (S), so that &#x3b8;and &#x3b8;remains consistently the expected bias point values of I-path and Q-path. The solution enables bias point of DQPSK demodulator to be locked at any expected bias point value, facilitates realization of digitization, and is not easily influenced.

Method and apparatus for controlling bias point of differential quadrature phase shift keying demodulator

The disclosure discloses a method and an apparatus for determining a bias point of a modulator, wherein the method includes: adding pilot signals to the bias voltages of the modulator; adjusting the bias point of the modulator at a predetermined step and acquiring a first harmonic amplitude value corresponding to each bias point in a backlight detection current signal output by the modulator; and determining a bias point corresponding to the maximum value of the first harmonic amplitude values associated with multiple bias points as the bias point of the modulator. By virtue of the disclosure, the detection of a difference frequency signal can be eliminated, thereby reducing the complexity and cost of a periphery control circuit while ensuring the control accuracy, effectively improving the stability and reliability of the control process, and improving the modulation and transmission performance of optical signals in the whole system.

Method and apparatus for determining bias point of modulator

Growing community of inventors

Shenzhen, China

Hong Yi