Abstract: A recyclable polymer aerogel, a preparation method therefor, a recovery method therefor, and a use thereof; and a recyclable cold-storage phase-change composite material containing the recyclable polymer aerogel, a recyclable cold-storage phase-change material having a real-time temperature monitoring function, a preparation method therefor, and a use thereof are provided. The polymer in the polymer aerogel contains a maleic anhydride group-containing structural unit and a maleimide group-containing structural unit. The polymer unit is prepared into an aerogel. The recyclable cold-storage phase-change material having a real-time temperature monitoring function has a layered structure comprising an inner layer formed by a recyclable cold-storage phase-change composite material, and an outer layer formed by a second polymer aerogel, and can achieve both large-batch temperature monitoring and recyclability.

Abstract: A spray device with an adjustable spray range is provided, including a supporting wall frame, an upper top plate, a movable horizontal plate, a lifting and telescoping device, and an adjustable nozzle. The upper top plate is arranged at a first end of the supporting wall frame away from a ground, the movable horizontal plate is slidably connected to a side of the upper top plate away from the ground, the movable horizontal plate is slidably arranged along a length direction of the upper top plate, and the lifting and telescoping device is fixed at an end of the movable horizontal plate away from the upper top plate; and an end of the lifting and telescoping device away from the movable horizontal plate is connected to a support plate, the lifting and telescoping device is telescopic along a height direction of the support plate, and the adjustable nozzle is rotatably arranged on the support plate.

Abstract: A composite aerogel, a recyclable heat-storage phase-change composite material with a photothermal conversion function are provided. The composite aerogel has a polymer and graphene. The polymer contains a maleic-anhydride-group-containing structural unit and a maleimide-group-containing structural unit. The composite aerogel can be used as a carrier to load a phase-change material, so as to obtain a recyclable heat-storage phase-change composite material, which has a photothermal conversion function and can also be recycled. The recyclable heat-storage phase-change composite material contains a composite aerogel and a phase-change material loaded in the composite aerogel.

Abstract: A method in an illustrative embodiment includes determining a compression ratio of a service processor (SP) in a storage system based on raw data and compressed data. The method further includes determining whether the compression ratio of the SP is greater than a predetermined threshold. The method further includes determining, in response to the compression ratio of the SP being greater than the predetermined threshold, a target virtual data migrator (VDM) associated with a compression task from a plurality of VDMs in the SP. The method further includes offloading the target VDM to a data processing unit (DPU) connected to the SP. In this way, the DPU can be used to expand the resources of the SP, process compression tasks, reduce the load on a CPU in the SP, and improve the compression efficiency and system performance.

Abstract: Embodiments of the present disclosure relate to a method for wireless communication, a wireless port connection device, and a computer program product. The method in one embodiment is illustratively performed by a first wireless port device. The method includes: sending a first public key of the first wireless port device to an authentication server; receiving a signed first certificate from the authentication server, the first certificate comprising a server public key of the authentication server; receiving a signed second certificate from a second wireless port connection device; acquiring a second public key of the second wireless port connection device in the second certificate using the server public key; generating a symmetric key using the second public key; encrypting data using the symmetric key; and sending the encrypted data to the second wireless port connection device.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product that involve address encryption. The method includes: in response to receiving a packet from a source device, extracting a first address representing an address of the source device from the packet. The method further includes: mixing the first address with a random number to generate a mixed address, wherein the number of bits of the first address is the same as the number of bits of the random number. The method further includes: encrypting the mixed address. Moreover, the method further includes: generating a second address representing the address of the source device at least partially based on the encrypted mixed address, wherein the second address includes a prefix field and an interface identifier field. Illustrative embodiments can improve the security of the source device, and reduce computational overhead during address encryption and decryption.

Abstract: A flame-retardant antimicrobial agent is a polymer microsphere with the surface grafted thereof with a guanidine salt. The polymer microsphere has a cross-linked structure composed of a structural unit A derived from maleic anhydride, a structural unit B derived from a monomer M, and a structural unit C derived from a cross-linking agent. The monomer M is selected from a C4-C9 aliphatic olefin or a mixture thereof, and the guanidine salt comprises at least one guanidine salt having the property of flame resistance. The flame-retardant antimicrobial agent has both a good antimicrobial effect and a good flame-retardant effect. A flame-retardant antimicrobial thermoplastic resin composition containing the flame-retardant antimicrobial agent also has a good flame-retardant and antimicrobial performance and a good overall performance.

Abstract: Embodiments of the present disclosure relate to a method, an apparatus, a device, and a medium for protecting an internet-of-things device. The method includes receiving a data packet associated with the internet-of-things device. The method further includes determining whether the data packet is for a to-be-protected target internet-of-things device based on a service identification in the data packet. The method further includes filtering, in response to the data packet being for the to-be-protected target internet-of-things device, the data packet based on service forwarding information related to a service of the target internet-of-things device to protect the target internet-of-things device. Through the method, normal packets are forwarded and possible attack data packets are abandoned by filtering the data packets, and thus the internet-of-things device is prevented from being attacked, which improves the security of the internet-of-things device and improves the user experience.

Abstract: A method includes: receiving, by a repository server, requests for pulling images from a plurality of nodes, wherein an image requested to be pulled by a first node is a first image; detecting, by the repository server, that layers of a plurality of images requested to be pulled by the plurality of nodes all include a common layer; generating, by the repository server, a transmission path of data of the common layer, wherein the transmission path includes that the repository server transmits the data of the common layer to a second node, and the second node distributes the data of the common layer to other nodes; sending, by the repository server, setting information to the first node according to the transmission path; sending, by the repository server, the data of the common layer to the second node; and acquiring, by the first node, the data of the common layer from a third node according to the setting information.

Abstract: A method in an illustrative embodiment includes storing one or more mapping entries of domain names to Internet protocol (IP) addresses in a cache of a programmable switch, wherein the mapping entries are obtained according to historical DNS responses from a DNS server; acquiring, by the programmable switch, a domain name in a DNS request received from a client; searching the cache of the programmable switch for an IP address corresponding to the domain name; generating, by the programmable switch according to the DNS request and the IP address corresponding to the domain name if the IP address is found, a DNS response that is to be sent to the client, wherein the DNS response comprises the IP address corresponding to the domain name that is found in the cache; and sending, by the programmable switch, the DNS response comprising the IP address to the client.

Abstract: A method in an illustrative embodiment includes storing one or more mapping entries of domain names to Internet protocol (IP) addresses in a cache of a programmable switch, wherein the mapping entries are obtained according to historical DNS responses from a DNS server; acquiring, by the programmable switch, a domain name in a DNS request received from a client; searching the cache of the programmable switch for an IP address corresponding to the domain name; generating, by the programmable switch according to the DNS request and the IP address corresponding to the domain name if the IP address is found, a DNS response that is to be sent to the client, wherein the DNS response comprises the IP address corresponding to the domain name that is found in the cache; and sending, by the programmable switch, the DNS response comprising the IP address to the client.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product for information processing. In an information processing method, a first network state representation and a first content request event of an emulated network are provided from an emulator to an agent for reinforcement learning, wherein the first content request event indicates that a request node in the emulated network requests target content stored in a source node. The emulator receives first action information from the agent, wherein the first action information indicates a first caching action determined by the agent, the first caching action including caching the target content in at least one caching node between the request node and the source node. The emulator collects, based on the execution of the first caching action in the emulated network, first training data for training the agent.

Abstract: Embodiments of the present disclosure relate to a method for wireless communication, a wireless port connection device, and a computer program product. The method in one embodiment is illustratively performed by a first wireless port device. The method includes: sending a first public key of the first wireless port device to an authentication server; receiving a signed first certificate from the authentication server, the first certificate comprising a server public key of the authentication server; receiving a signed second certificate from a second wireless port connection device; acquiring a second public key of the second wireless port connection device in the second certificate using the server public key; generating a symmetric key using the second public key; encrypting data using the symmetric key; and sending the encrypted data to the second wireless port connection device.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a program product implemented at an edge switch for data encryption. For example, the present disclosure provides a data encryption method implemented at an edge switch. The method may include receiving encryption and decryption information for an encryption operation or a decryption operation from a source device. In addition, the method may include encrypting a data packet received from the source device based on encryption information in the encryption and decryption information to generate an encrypted data packet. The method may further include sending the encrypted data packet to a target device indicated by the data packet. The embodiments of the present disclosure can reduce the computing loads of Internet of Things (IoT) devices, clouds, and servers while ensuring encryption performance, and can also reduce the time delay caused by encryption and decryption operations.

Abstract: Embodiments of the present disclosure relate to a method, a device, and a computer program product for processing data. The method includes: loading, at a switch and in response to receipt of a model loading request from a terminal device, a data processing model specified in the model loading request. The method further includes: acquiring model parameters of the data processing model from the terminal device. The method further includes: processing, in response to receipt of to-be-processed data from the terminal device, the data using the data processing model based on the model parameters. Through the method, data may be processed at a switch, which improves the efficiency of data processing and the utilization rate of computing resources, and reduces the delay of data processing.

Abstract: A method includes: receiving, by a repository server, requests for pulling images from a plurality of nodes, wherein an image requested to be pulled by a first node is a first image; detecting, by the repository server, that layers of a plurality of images requested to be pulled by the plurality of nodes all include a common layer; generating, by the repository server, a transmission path of data of the common layer, wherein the transmission path includes that the repository server transmits the data of the common layer to a second node, and the second node distributes the data of the common layer to other nodes; sending, by the repository server, setting information to the first node according to the transmission path; sending, by the repository server, the data of the common layer to the second node; and acquiring, by the first node, the data of the common layer from a third node according to the setting information.

Abstract: Embodiments of the present disclosure relate to a data read method, a data storage method, an electronic device, and a computer program product. The data read method includes: receiving a data read request, the data read request comprising a data identifier associated with target data; determining a storage device of the target data based on the data identifier; and acquiring the target data from the storage device based on the data identifier. The data storage method includes: receiving a data storage request, the data storage request comprising a data identifier associated with data to be stored; determining, based on the data identifier, a target storage device for the data to be stored; and storing, based on the data identifier, the data to be stored to the target storage device. With the technical solutions of the present disclosure, a named data network with good performance and efficient operation can be achieved.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product that involve address encryption. The method includes: in response to receiving a packet from a source device, extracting a first address representing an address of the source device from the packet. The method further includes: mixing the first address with a random number to generate a mixed address, wherein the number of bits of the first address is the same as the number of bits of the random number. The method further includes: encrypting the mixed address. Moreover, the method further includes: generating a second address representing the address of the source device at least partially based on the encrypted mixed address, wherein the second address includes a prefix field and an interface identifier field. Illustrative embodiments can improve the security of the source device, and reduce computational overhead during address encryption and decryption.

Abstract: Embodiments of the present disclosure relate to a method, an electronic device, and a computer program product for implementing a blockchain system on a switch. The method includes establishing a first blockchain node and a second blockchain node on the switch, where the first blockchain node includes a first ingress port and a first egress port, and the second blockchain node includes a second ingress port and a second egress port. The method further includes receiving a broadcast or multicast request from a user device through a user port of the switch. The method further includes sending the broadcast or multicast request to the first ingress port of the first blockchain node and the second ingress port of the second blockchain node. Through the embodiments of the present disclosure, a blockchain system can be implemented on a switch, so as to reduce the latency of the blockchain system.

Abstract: Embodiments of the present disclosure provide a method, an electronic device, and a computer program product for managing an operating system. The method includes receiving a version upgrade request for the system. The method further includes using a target system image to upgrade the system from a first version to a second version corresponding to the target system image. The method further includes storing, in response to determining that the system operates normally within a first time period, the target system image to a first storage device for the system without updating a historical system image stored in a second storage device for the system, wherein the historical system image corresponds to the first version. In this way, by storing image files of different versions for selectively resetting the operating system in case of a failure, stability of the system after an upgrade is improved.