Abstract: The present disclosure relates to a searchable encrypted data sharing method and system based on blockchain and homomorphic encryption, which protects security of sensitive data on the blockchain and realizes searchable and homomorphic calculation of data ciphertext. According to the present disclosure, a data owner encrypts the generated sensitive data and the keywords extracted according to the data with his own key, and then sends the encrypted transaction information to the cloud server. The cloud server verifies the identity of the data owner. If the verification succeeds, the uploaded ciphertext data is stored on a local server, and a ciphertext index, keyword ciphertext and related evidences of the data storage are uploaded to an alliance chain. The alliance chain node verifies the consistency of the uploaded transaction information, and if the verification succeeds, the transaction information is recorded.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: Provided are a multi-parameter accurate prediction method and a system for three-dimensional time-space sequence of seawater quality, which includes the following steps: obtaining key parameters of the seawater quality, and processing the key parameters to obtain target key parameters; obtaining time-space feature information among the target key parameters based on space attention; obtaining predicted future data sequence information based on time attention and the time-space feature information; predicting future water quality multi-parameter contents based on the time-space feature information and the predicted future data sequence information to obtain prediction results.

Abstract: Method and adapter apparatus for securing information exchanged between a calling party and a called party. A first signal is generated, which is representative of an analog probe signal. The first signal is released towards the called party. Responsive to receipt from the called party of a second signal responsive to the analog probe signal and indicative of an ability of the called party to participate in a secure information exchange, negotiations are performed with the called party to securely exchange subsequent information with the called party. In this way, the adapter apparatus can securely exchange information without prior knowledge of whether the called party is secure-capable or secure-incapable and without prior knowledge of whether the called party is a POTS phone or a packet-switched device.

Abstract: Method and adapter apparatus for securing information exchanged between a calling party and a called party. A first signal is generated, which is representative of an analog probe signal. The first signal is released towards the called party. Responsive to receipt from the called party of a second signal responsive to the analog probe signal and indicative of an ability of the called party to participate in a secure information exchange, negotiations are performed with the called party to securely exchange subsequent information with the called party. In this way, the adapter apparatus can securely exchange information without prior knowledge of whether the called party is secure-capable or secure-incapable and without prior knowledge of whether the called party is a POTS phone or a packet-switched device.