Alibaba Group Holding Limited

Advanced New Technologies Co., Ltd.

Maxio Technology (hangzhou) Co., Ltd.

Huawei Technologies Co., Limited

Zhejiang Construction Engineering Group Co., Ltd

Hangzhou Hikvision Digital Technology Co., Ltd.

Hangzhou Hikmicro Sensing Technology Co., Ltd.

Wei Xu

Jidong Chen

Peng Li

Dandan Zheng

Jie Su

Jun Chen

Hui Jiang

Fei Wu

Zihua Xiao

Jian He

Zhehang Wen

Bo Chang

Yiming Lu

Jinghui Ping

Qiang Hu

Chuanming Zhai

Xinyou Chen

Rui Jin

Laibin Qiu

Caicheng Lin

Zhengliang Chen

Gang Fang

Yan Cai

Li Liang

Guohua Chen

Hangkai Zhang

A data access method performed by a processing device is disclosed. The processing device manages a storage device based on a log-structured file system (LFS), where the processing device writes a target file to the storage device based on an out place update (OPU) mechanism; and the processing device writes file attribute information corresponding to the target file in the storage device to out of band (OOB) data of the storage device, to restore, after abnormal power-off, access to the target file by using the file attribute information stored in the OOB data. In this way, when writing the target file to the storage device, the processing device may write a file attribute corresponding to the target file to the OOB data, so that after abnormal power-off, access to the target file may be restored by using the file attribute information.

Data access method and apparatus

Disclosed are a solid state drive and a write operation method. The solid state drive comprises: a controller, receiving write data from outside and comprising a first cache unit for storing the write data; a Flash memory, receiving the write data sent by the first cache unit according to a first instruction of the controller; a second cache unit, storing the write data from the first cache unit as backup data, and sending the backup data to the Flash memory according to a second instruction of the controller. The second instruction is obtained after the write data fails to be written into the Flash memory under the first instruction, so that the backup data can continue to be called if write operation fails. By combining advantages of the first and second cache units, efficiency and quality of write operations are improved and bandwidth requirements are lowered.

Solid state drive and write operation method

Disclosed is a system and a method for information distribution. The system comprises: a server for generating a group key and its corresponding key deriving parameter, wherein the server encrypts sensitive contents by using the group key to obtain encrypted information; and terminals configured to receive the encrypted information through an open channel, extract the group key, then decrypt the encrypted information by using the group key to obtain the original content. In the group forming process, each terminal encrypts its private identifier using the public key and submits the ciphertext to the server. In information distribution process, the server transmits the ciphertext of sensitive contents and the key deriving parameter to the terminals via open channel Because private information available only to respective group members is required for calculating the group key, this mechanism ensures that the sensitive content can be transmitted securely on the open channel.

Method and system for secure information distribution based on group shared key

A method, a device, and a storage medium for certificate identification. The method may comprise: instructing a user to move a certificate according to a designated movement method within an imaging region of a camera of a terminal device; imaging the certificate in the imaging region to obtain a movement video of the certificate; extracting at least one key frame in the movement video; analyzing an image content of the at least one key frame according to a certificate identification method that corresponds to the designated movement method, to generate an analysis result of the image content; and determining, based on the analysis result, whether the certificate is a forged certificate.

Method and apparatus for certificate identification

A method for identifying a certification includes: determining a target verification mode for verifying a certificate, wherein the target verification mode comprises one or more pieces of movement information of movements performed by a designated body part with respect to the certificate, and the one or more pieces of movement information include information of holding the certificate in one or more designated holding postures; obtaining one or more images of the certificate; verifying whether a first image of the one or more images of the certificate comprises the designated body part; in response to that the first image comprises the designated body part, analyzing, whether the first image comprises the one or more pieces of movement information to generate an analysis result; and determining, based on the analysis result, whether the certificate is a forged certificate.

Implementations of the present specification disclose image recognition methods, apparatuses, and devices, and authentication methods, apparatuses, and devices. A solution includes the following: obtaining a target image of a target object, where before the target image is obtained, a recognition identifier is mapped onto the target object, and where the recognition identifier is used to form a corresponding recognition feature in the target image; and determining an attribute of the target object corresponding to the target image based on a predetermined mapping relationship and the recognition feature, where the mapping relationship includes a corresponding relationship between the recognition feature and the attribute of the target object.

Image recognition and authentication

Disclosed in the application are document verification and identity verification methods and devices. A computer-implemented document verification method comprises: obtaining an image of a to-be-verified document; and verifying whether an anti-counterfeiting identifier exists in the image; verifying a source of the image; and obtaining a verification result for the to-be-verified document based on the verification of the anti-counterfeiting identifier and the verification of the source of the image. A computer-implemented identity verification method comprises: obtaining an image of an identity document of a to-be-verified user; obtaining a first verification result for the identity document based on the image of the identity document; verifying authenticity of identity information in the image of the identify document to obtain a second verification result; and determining an identity verification result for the to-be-verified user based on the first verification result and the second verification result.

Document verification system, device, and method using a classification model

This specification describes techniques for verifying authenticity of an image. One example method includes identifying a baseline image depicting a baseline background; identifying a comparison image depicting a card; identifying a comparison background in the comparison image, wherein the comparison background is an area of the comparison image other than an area occupied by the card; determining a probability that the baseline background matches the comparison background; determining that the probability satisfies a verification threshold; and in response to determining that the probability satisfies a verification threshold, determining that the comparison image was acquired by capturing an image of a physical card corresponding to the card depicted in the comparison image.

Method and apparatus for verifying certificates and identities

A constructing method for a concrete cylinder of a construction steel bar of a high-rise steel structure adopts a constructing method of supporting inside and climbing outside. The outside of the cylinder adopts hydraulic mutual-climbing adhesive lifting scaffold creeping formwork system (), and also has an outside wallboard mechanical formwork erection function and an outer frame protection function. For the inside of the cylinder, except that an appropriate structure is left for later processing according to a schedule requirement, beam walls all adopt a steel cylinder support to perform formwork erection, so as to greatly reduce the workload of repeatedly mounting/dismantling the scaffold and the formwork at a high place. The scaffold itself carries the formwork erection system, so formwork erection and formwork removal can be mechanized, thereby reducing the risk of formwork erection and formwork removal at a high place.

Constructing method for concrete cylinder of construction steel bar of high-rise steel structure

Growing community of inventors

Hangzhou, China

Wei Xu