Advanced New Technologies Co., Ltd.

Zhejiang University

Alipay (hangzhou) Information Technology Co., Ltd.

Electrolux Appliances Aktiebolag

Zhejiang Lab

Alipay Information Technology Co., Ltd.

Peng Wu

Changqing Li

Jincan Kong

Changhua He

Bin Huang

Lei Wang

Yinchao Zou

Shuai Yang

Dazhuan Wu

Ying Yan

Changzheng Wei

Hui Zhang

Hai Wang

Hongwei Zhao

Tian Xiang

Yaochun Hou

Zhu Zhu

Zongru Zhan

Lu Wang

Zhenquan Wu

Hongxuan Zhang

Pengzhong Wang

Yuxuan Wang

Pengcheng Du

Kexin Pu

A gear fault diagnosis method based on joint weighted envelope noise-resistant correlation of sub-signals, comprising: converting an original vibration signal sequence into an envelope signal through a signal sequence element-wise squaring-low-pass filtering-square root computation process, reconstructing the envelope signal according to different time intervals to obtain a series of sub-signals, calculating a fault information representation measure of each sub-signal based on an L-moment theoretical index, assigning a weight to each sub-signal with Sigmoid transformation, calculating a joint weighted envelope noise-resistant correlation function of the envelope signal sequence and the reconstructed sub-signals based on the envelope signal, the reconstructed sub-signals and the corresponding weights thereof, and determining a characteristic frequency according to a reciprocal of a time interval value corresponding to the characteristic peak in a plot of the joint weighted envelope noise-resistant correlation function with the time interval to eventually identifying a gear fault.

Gear fault diagnosis method based on joint weighted envelope noise-resistant correlation of sub-signals

A kitchen appliance is disclosed. The kitchen appliance comprises: a user interface control unit for interacting with a user; a plurality of driver units configured to control power supply to a plurality of coils; and the plurality of coils configured to heat one or more cookers based on electromagnetic induction effect, wherein each driver unit is configured to generate a control signal for a corresponding coil of the plurality of coils, and the control signal is used for controlling the power supply to the corresponding coil by controlling turn-on or turn-off of an insulated gate bipolar transistor (IGBT) in a single-pipe module.

Kitchen appliance

A method for diagnosing rotor rub-impact in a rotating machinery based on vibration signal deconstruction and frequency modulation characteristic anti-noise enhancement, including: converting, based on two-stage integration transformation and high-pass filtering, vibratory acceleration signals from a rotating machinery device into vibratory displacement signals; performing targeted extraction on a rotating frequency component therein based on an improved variational mode decomposition method; calculating and estimating instantaneous fluctuation characteristics of a fundamental frequency of the extracted rotating frequency component using a quadrature-derivative-based normalized Hilbert transform to obtain an instantaneous frequency; inputting a calculated instantaneous frequency sequence into an optimum stochastic resonance system for anti-noise enhancement of intrawave frequency modulation characteristics; and processing FFT on an instantaneous frequency of intrawave frequency modulation characteristics after anti-noise enhancement, and diagnosing and identifying a rotor rub-impact fault of the rotating machinery based on a distribution characteristic of harmonic amplitudes related to a rotor rotating frequency.

Method for diagnosing rotor rub-impact in rotating machinery based on vibration signal deconstruction and frequency modulation characteristic anti-noise enhancement

Implementations of this disclosure provide data transmission operations and network interface controllers. An example method performed by a first RDMA network interface controller includes obtaining m data packets from a host memory of a first host; sending the m data packets to a second RDMA network interface controller of a second host; backing up the m data packets to a network interface controller memory integrated into the first RDMA network interface controller; determining that the second RDMA network interface controller does not receive n data packets of the m data packets; and in response, obtaining the n data packets from the m data packets that have been backed up to the network interface controller memory integrated into the first RDMA network interface controller, and retransmitting the n data packets to the second RDMA network interface controller.

Data transmission and network interface controller

A cryptographic acceleration card generates, using an attribute unique to a blockchain integrated station that comprises the cryptographic acceleration card, an identity private key for the blockchain integrated station. The cryptographic acceleration card generates a private key ciphertext by encrypting the identity private key. The cryptographic acceleration card stores the private key ciphertext.

Blockchain integrated station and cryptographic acceleration card, key management methods and apparatuses

A cryptographic acceleration card included in a blockchain integrated station sends negotiation information to a provider of a new disk image, where the negotiation information is used by the provider to determine a deployment key, and where the new disk image is used to update an old disk image included in the blockchain integrated station. The cryptographic acceleration card receives a new hash value encrypted by the provider using the deployment key, where the new hash value corresponds to the new disk image. The cryptographic acceleration card replaces an old hash value corresponding to the old disk image with the new hash value, where the new hash value is compared with a current hash value of a disk image included in the blockchain integrated station to determine whether the disk image matches the new disk image.

Hash updating methods and apparatuses of blockchain integrated station

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for liveness detection are provided. One of methods includes: displaying an image to a user, and capturing a face image of the user while displaying the image to the user; determining an eye image of an eye of the user based on the face image; extracting a to-be-verified image from the eye image of the user, wherein the to-be-verified image is reflection of the displayed image in the eye of the user; comparing the displayed image with the to-be-verified image to determine whether the to-be-verified image matches the displayed image; and performing liveness detection on the user based on a result of comparison.

Living body detection method, apparatus and device

The present disclosure discloses a horizontal-axis ocean current power generation device for an underwater vehicle. The power generation device is disposed in a groove of a rotary body of the underwater vehicle, and includes an undercarriage unit, a yawing unit, and a power generation unit. The undercarriage unit can realize elevation and descent of the entire power generation device, and the power generation unit is capable of realizing arbitrary rotation within 360&#xb0; in a horizontal plane through the yawing unit. The power generation device can actively yaw based on change of an ocean current direction to perform an incident flowing function. The power generation unit respectively drives an outer shaft and an inner shaft to rotate through a front blade and a rear blade that rotate in opposite directions, so as to drive inner and outer rotors of a motor, thereby cutting magnetic induction to generate electric power.

Horizontal-axis ocean current power generation device for underwater vehicle

A Remote Direct Memory Access (RDMA) based data transmission method is disclosed. In this method, an RDMA network interface card is used to encrypt data to improve the security of data transmission. In addition, the data encryption and decryption operation is implemented inside the RDMA network interface card and is transparent to software, thereby ensuring security without adversely affecting performance of an application program.

RDMA-based data transmission method, network interface card, server and medium

A Remote Direct Memory Access (RDMA) data sending method is disclosed. The method is applicable to a sending end, with a data-transmission RDMA device disposed thereon. The method includes: the data-transmission RDMA device acquiring raw data; the data-transmission RDMA device compressing the raw data by using a preset compression method to obtain compressed data; and the data-transmission RDMA device encapsulating the compressed data into a data packet, and transmitting the data packet to a receiving end. The data packet may include a method tag corresponding to the preset compression method. In this method, the compression and transmission of the raw data are conducted by the data-transmission RDMA device on the hardware level.

RDMA data sending and receiving methods, electronic device, and readable storage medium

Growing community of inventors

Hangzhou, China

Peng Wu