Abstract: The disclosure herein describes converting a disk cluster to a different format. A format conversion instruction associated with a disk cluster is received. A first subgroup of disks of the disk cluster that are the emptiest disks of the disk cluster are identified and all data is evacuated from the first subgroup of disks to other disks of the disk cluster. The first subgroup of disks is reformatted based on the received format conversion instruction. A group of data objects stored in the disk cluster is converted based on the format conversion instruction and the converted group of data objects are written to the reformatted first subgroup of disks. The process iterates through the disks of the disk cluster to reformat all disks and convert all data objects based on the received format conversion instruction. The process reduces the write operations required to convert the format of the disk cluster.

Abstract: The disclosure herein describes converting a disk cluster to a different format. A format conversion instruction associated with a disk cluster is received. A first subgroup of disks of the disk cluster that are the emptiest disks of the disk cluster are identified and all data is evacuated from the first subgroup of disks to other disks of the disk cluster. The first subgroup of disks is reformatted based on the received format conversion instruction. A group of data objects stored in the disk cluster is converted based on the format conversion instruction and the converted group of data objects are written to the reformatted first subgroup of disks. The process iterates through the disks of the disk cluster to reformat all disks and convert all data objects based on the received format conversion instruction. The process reduces the write operations required to convert the format of the disk cluster.

Abstract: The present invention discloses an acrylate oligomer, the acrylate oligomer is obtained by a reaction of isocyanate group-terminated oligomer and formate-terminated ethylene glycol methacrylate. After the acrylate oligomer provided by the present invention is photocured, the molecular structure, cross-linking density and other network structure characteristics of the acrylate oligomer can be changed through specific post-processing. Since the formate component formed after heat treatment has no water absorption and has a low glass transition temperature, the final material obtained after heat treatment has a lower water absorption rate and glass transition temperature. The present invention also provides a preparation method and an application method of the acrylate oligomer.

Abstract: A current sampling system, the system including a magnetic component, that is an inductor or a transformer that has at least one winding, where the at least one winding has a first part and a second part, where a first terminal of the first part is connected to a first terminal of the second part, and where a second terminal of the first part is separated from a second terminal of the second part, and a current detection circuit, where the second terminal of the second part is connected to the current detection circuit, and where the current detection circuit is configured to sample a current flowing through the second part, and obtain a total current of the winding based on the sampled current flowing through the second part and a preset ratio.

Abstract: The present invention provides a method to prepare polymer materials with interlocked porous structures by freezing and demulsification, which includes: (1) Preparing an emulsion containing uncrosslinked polymers and crosslinking agents. The uncrosslinked polymers are presented in the organic phase, and the crosslinking agents are presented in the organic phase or water phase. Under freezing, the demulsification is occurred which leads to the interaction between polymers and crosslinking agents, and the crosslinked materials are obtained. (2) After removing the ice crystals, polymer materials with interlocked porous structures are synthesized. The method provided by the present invention is simple to operate, and can well adjust the porous structures of obtained porous polymer materials. In addition, it is suitable for large scale manufacturing. At the same time, this process can form different functional porous polymer materials by simply changing the used monomers.

Abstract: The present disclosure relates to bootstrapping an encrypted single node VSAN cluster. One method includes receiving a request to create an encrypted VSAN cluster from a single host in a software-defined datacenter, deploying a virtual server on a VSAN datastore of the software-defined datacenter, registering a native key provider (NKP) in the virtual server, creating an empty VSAN cluster encrypted by the NKP, adding the single host to the encrypted empty cluster to create a one-host encrypted cluster, registering a KMIP KMS in the virtual server, switching encryption of the one-host encrypted cluster from the NKP to the KMIP KMS, and adding another host to the one-host encrypted cluster to create the encrypted cluster.

Abstract: The present disclosure provides a base station. The base station includes a multi-function board, a radome and at least one antenna element. The radome is configured to cover the multi-function board. The at least one antenna element is provided between the multi-function board and the radome. The multi-function board is configured to integrate with at least two of functions of a radio board, an EMC cover, an AC board, an antenna reflector, and an Antenna board.

Abstract: A reversible epoxy polymer obtainable by the reaction between at least one epoxy compound and at least one curing agent, wherein at least part of the epoxy compound contains one reversible borate moiety or derivative thereof per molecule; and/or at least part of the curing agent contains one reversible borate moiety or derivative thereof per molecule; and/or the reaction system further comprises at least one compound containing hydroxyl and epoxy group and at least one BQH-containing compound or its ester derivative, wherein said BQH-containing compound contains two or more B-QH moieties, and wherein the derivative of borate moiety represents a moiety with the oxygen in the borate moiety being replaced with other element of the sixth main group and wherein each Q is independently an element of the sixth main group.

Abstract: System and method for converting a storage object in a redo-log snapshot format to a single-container snapshot format in a distributed storage system uses a temporary snapshot object, which is created by taking a snapshot of the storage object, and an anchor object, which points to a root object of the storage object. For each object chain of the storage object, each selected object is processed for format conversion. For each selected object, difference data between the selected object and a parent object of the selected object is written to the anchor object, a child snapshot of the anchor object is created in the single-container snapshot format, and the anchor object is updated to point to the selected object. The data of the running point object of the storage object is then copied to the anchor object, and each processed object and the temporary snapshot object are removed.

Abstract: A method for implementing native snapshot capabilities on non-native snapshots includes generating a virtual disk container having both native snapshot functionality and functionality of the non-native snapshot, including redo-log snapshot functionality. Redo-log parent disk chains may be preserved, along with subsequent native snapshot data, in virtual disk container objects. A virtual root node of a copy-on-write data structure of a virtual disk container object enables snapshotting and traversal between a redo-log disk chain and a native snapshot disk chain. Throughout backup and reversion operations, the virtual disk container object may be reparented as necessary, and a constant running point may be maintained for the virtual disk container object.

Abstract: An example method for a first host, being an owner of an object stored in a virtual storage area network (vSAN) cluster, to perform encryption and decryption operations during a rekey in the vSAN cluster is disclosed. The method includes obtaining a first encryption key and a first key identifier (ID) of the first encryption key; transmitting the first key ID and an active key index to a second host; using the first encryption key to perform encryption and decryption operations; and in response to a determination of receiving a key change notification from a master node of the vSAN cluster, terminating a connection with the second host.

Abstract: A current detection apparatus includes a magnetic sensor, configured to sense a magnetic field change of a to-be-tested current path, and convert the magnetic field change into an electrical signal; and a magnetically conductive unit, including a magnetically conductive material. The magnetically conductive unit is disposed on at least one of the following positions: a left side of the magnetic sensor, a right side of the magnetic sensor, and an upper side of the magnetic sensor, and the left side and the right side of the magnetic sensor are a left side and a right side of the magnetic sensor along the to-be-tested current path.

Abstract: Distributed storage system and method for transmitting storage-related messages between host computers in a distributed storage system uses a handshake operation of a first-type communication connection between a source data transport daemon of a source host computer and a target data transport daemon of a target host computer to derive a symmetric key at each of the source and target data transport daemons. The two symmetric keys are sent to a source data transport manager of the source host computer and to a target data transport manager of the target host computer. The source and target data transport managers then use the same symmetric keys to encrypt and decrypt storage-related messages that are transmitted from the source data transport manager to the target data transport manager through multiple second-type communication connections between the source and target data transport managers.

Abstract: The present disclosure relates to bootstrapping an encrypted single node VSAN cluster. One method includes receiving a request to create an encrypted VSAN cluster from a single host in a software-defined datacenter, deploying a virtual server on a VSAN datastore of the software-defined datacenter, registering a native key provider (NKP) in the virtual server, creating an empty VSAN cluster encrypted by the NKP, adding the single host to the encrypted empty cluster to create a one-host encrypted cluster, registering a KMIP KMS in the virtual server, switching encryption of the one-host encrypted cluster from the NKP to the KMIP KMS, and adding another host to the one-host encrypted cluster to create the encrypted cluster.

Abstract: A method for chemical upcycling of the resins containing ester bonds is described herein. The method comprises two steps: (1) The resins dissolved into a catalyst-solvent system via a network fragmentation strategy to generate non-crosslinked polymer fragment mixture with functional groups. (2) After introducing additives and reacting for predetermined time, a reconfigurable strong resin and a photocurable resin with repeated recyclability are obtained. The low energy consumption and cost, the high performance and economical value added of the regenerated productions, and the ease implement without changing the commodity products and manufacturing facilities make it attractive and suitable for the recycling of the resin wastes.

Abstract: Distributed storage system and method for transmitting storage-related messages between host computers in a distributed storage system uses a handshake operation of a first-type communication connection between a source data transport daemon of a source host computer and a target data transport daemon of a target host computer to derive a symmetric key at each of the source and target data transport daemons. The two symmetric keys are sent to a source data transport manager of the source host computer and to a target data transport manager of the target host computer. The source and target data transport managers then use the same symmetric keys to encrypt and decrypt storage-related messages that are transmitted from the source data transport manager to the target data transport manager through multiple second-type communication connections between the source and target data transport managers.

Abstract: The present disclosure provides a base station. The base station includes a multi-function board, a radome and at least one antenna element. The radome is configured to cover the multi-function board. The at least one antenna element is provided between the multi-function board and the radome. The multi-function board is configured to integrate with at least two of functions of a radio board, an EMC cover, an AC board, an antenna reflector, and an Antenna board.

Abstract: Example methods and systems to perform a migration of a virtualized computing instance and its first snapshot hierarchy from a first object store to a second object store have been disclosed. One example method includes identifying a first disk chain of the first snapshot hierarchy having an object running point, identifying a second disk chain of the first snapshot hierarchy different from the first disk chain, and migrating the second disk chain from the first object store to the second object store to form a first branch of a second snapshot hierarchy in the second object store. After the migrating, the example method includes instructing to take a first native snapshot on the object running point in the second object store, instructing to revert the object running point along the first branch and migrating the first disk chain from the first object store to the second object store.

Abstract: The present disclosure provides a method to fabricate three-dimensional transparent glass utilizing polymer plasticity, including the following steps. In step 1, synthesize polymer-glass powder composite containing dynamic chemical bonds, the bond exchange catalyst is added during the synthesis process, and then cure to obtain a two-dimensional sheet shape I, the bond exchange catalyst is used to activate a dynamic chemical bond in step 2. In step 2, shape the two-dimensional sheet shape I obtained in step 1 into a complex three-dimensional shape II under the conditions of the effect of an external force and the activable dynamic chemical bond. In step 3, pyrolyze the composite precursor at high temperature to obtain transparent glass with complex three-dimensional shape II. The present disclosure provides a method in shaping the transparent glass with complex geometries by unique polymer plasticity in lower temperature.