Abstract: A trust rule between a first service and a second service in a plurality of services deployed in a distributed system is received; the trust rule defines whether the first service is allowed to access the second service. A trust tree is obtained for the distributed system, and the trust tree comprises a plurality of certificates for accessing the plurality of services. A first group of certificates is selected for the first service based on the trust rule and the trust tree, and the first group of certificates enables the first service to access the second service.

Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: The present disclosure discloses superhydrophobic nanoparticles and a preparation method therefor, and a superhydrophobic nanofluid.

Abstract: The invention relates to the field of oilfield development engineering, and discloses a self-growing gel dispersion active fluidity control system and a fluid channeling control method for a low-permeability-tight reservoir. The system contains 100 parts by weight of a self-growing gel dispersion and 0.15-0.6 part by weight of a surfactant, the self-growing gel dispersion is prepared by shearing and grinding nano-reinforced chromium-aldehyde double-group cross-linked integral gel, and the preparation method of the nano-reinforced chromium-aldehyde double-group cross-linked integral gel comprises the following steps: adding a functional polymer, a phenolic resin cross-linking agent, are organic chromium cross-linking agent and a nano-reinforcer into water, mixing, and curing.

Abstract: This invention provides a fan assembly including a mounting bracket, a fan and a circuit board assembly. The fan is disposed in the mounting bracket. The circuit board assembly includes a circuit board and a plurality of gold fingers. The plurality of gold fingers are disposed on and electrically connected to the circuit board. The circuit board is disposed on the mounting bracket and electrically connected to the fan.

Abstract: This disclosure relates to a server including a storage chassis, a tray, a hard disk, a bracket, and a fan. The storage chassis includes a bottom plate and two sidewalls. The sidewalls respectively stand at two opposite sides of the bottom plate The bottom plate has a front edge and a rear edge that are opposite to each other and located between the sidewalls. The tray is slidably disposed on the storage chassis. The hard disk is disposed on the tray. The bracket is connected to the rear edge of the storage chassis. At least part of the bracket is located at a side of the rear edge of the storage chassis away from the front edge. The fan is disposed in the bracket, and the fan is electrically connected to the hard disk.

Abstract: Solutions preparing container images and data for container workloads prior to start times of workloads predicted through workload trend analysis. Local storage space on the node is managed based on workload trends, optimizing local storage of image files without requiring frequent reloading and/or deletion of image files, avoiding network intensive I/O operations when pulling images to local storage by workload scheduling systems. Systems perform collection of historical data including image and workload properties; analyze historical data for workload trends, including predicted start times, image files needed, number of nodes and types of nodes. Based on predicted future workload start times, nodes are selected from an ordered list of node requirements and workload properties.

Abstract: A server comprises a cabinet, a computing node and a plurality of hard disk assemblies. The cabinet is provided with a computing node accommodating slot and a plurality of hard disk accommodating slots. The computing node is assembled in the computing node accommodating slot, wherein the computing node is not provided with any hard disk. The hard disk assemblies are respectively assembled in the hard disk accommodating slots, wherein each of the hard disk assemblies has a plurality of hard disks, and the plurality of hard disk is electrically connected to the computing node.

Abstract: A server and an electronic assembly including riser card and expansion card. Riser card includes first circuit board, first connector, second connector, and fastening pillar. First connector and second connector are fixed on and electrically connected to first circuit board. Fastening pillar is fixed on first circuit board. Expansion card includes second circuit board, third connector, and fastener. Third connector is fixed on and electrically connected to second circuit board. Third connector is plugged into second connector. Fastener penetrates through second circuit board and is fixed on fastening pillar of riser card so as to fix first circuit board and second circuit board to each other. Specification of first connector of riser card is different from specification of second connector of riser card.

Abstract: This disclosure relates to a server including a storage chassis, a tray, a hard disk, a bracket, and a fan. The storage chassis includes a bottom plate and two sidewalls. The sidewalls respectively stand at two opposite sides of the bottom plate The bottom plate has a front edge and a rear edge that are opposite to each other and located between the sidewalls. The tray is slidably disposed on the storage chassis. The hard disk is disposed on the tray. The bracket is connected to the rear edge of the storage chassis. At least part of the bracket is located at a side of the rear edge of the storage chassis away from the front edge. The fan is disposed in the bracket, and the fan is electrically connected to the hard disk.

Abstract: A mussel bionic gel composition includes: a mussel bionic copolymer and/or a mussel bionic compound, a cross-linking agent and water, wherein the mussel bionic copolymer includes a structural unit A from a vinyl monomer and a structural unit B from a vinyl-containing mussel bionic catechol group monomer; and the mussel bionic compound includes polyacrylamide and a mussel bionic catechol compound. The self-growth gel particle profile control and water plugging agent prepared from the composition is low in initial apparent viscosity, easy to inject and far in migration, has good shear repairing performance and is particularly applicable to a low-permeability fractured reservoir, thereby adjusting a micro-fracture network, improving a fracture channel and increasing waterflood efficiency and recovery efficiency.

Abstract: A server chassis including rack and mount cage. Mount cage includes cage part and handle. Cage part is fixed on a side of the rack. Handle includes pivot part, handheld part, and protruding part. Handheld part and protruding part are respectively connected to two opposite sides of pivot part, and pivot part is pivotally connected to cage part. Protruding part has first side surface located on a side of protruding part that is located away from pivot part. An axis of pivot part is spaced apart from first side surface by first distance along first direction. Pivot part is spaced apart from first side surface by second distance along second direction. First direction is different from the second direction, and first distance is different from second distance.

Abstract: A mussel bionic gel composition includes: a mussel bionic copolymer and/or a mussel bionic compound, a cross-linking agent and water, wherein the mussel bionic copolymer includes a structural unit A from a vinyl monomer and a structural unit B from a vinyl-containing mussel bionic catechol group monomer; and the mussel bionic compound includes polyacrylamide and a mussel bionic catechol compound. The self-growth gel particle profile control and water plugging agent prepared from the composition is low in initial apparent viscosity, easy to inject and far in migration, has good shear repairing performance and is particularly applicable to a low-permeability fractured reservoir, thereby adjusting a micro-fracture network, improving a fracture channel and increasing waterflood efficiency and recovery efficiency.

Abstract: The present disclosure discloses a multi-grafting site carbon nanomaterial comprising a structural unit represented by Formula (1), hydroxyl groups and a structural unit represented by Formula (2); wherein R is one or more selected from the group consisting of tolyl, diphenylmethyl, isophorone group and dicyclohexylmethyl;

Abstract: A server chassis including rack and mount cage. Mount cage includes cage part and handle. Cage part is fixed on a side of the rack. Handle includes pivot part, handheld part, and protruding part. Handheld part and protruding part are respectively connected to two opposite sides of pivot part, and pivot part is pivotally connected to cage part. Protruding part has first side surface located on a side of protruding part that is located away from pivot part. An axis of pivot part is spaced apart from first side surface by first distance along first direction. Pivot part is spaced apart from first side surface by second distance along second direction. First direction is different from the second direction, and first distance is different from second distance.

Abstract: Provided is a method for construction of recombinant bacteria for producing 3-hydroxypropionic acid. The method includes: knocking out fadR, fabF and fabH genes of recipient bacteria, introducing acc genes or gene clusters, alKL and Mcr genes, and enhancing the expression of fadL, fadD, sthA genes and atoSC gene clusters in the recipient bacteria. Also provided is a method for producing 3-hydroxypropionic acid by using the recombinant bacteria.

Abstract: A contact press-on assembly for a switching contact piece of an electrical switching unit has a first stop and a second stop. A spring element extends between the two stops, wherein the first stop can move relative to the second stop. The second stop provides a counterbearing for the first stop, wherein a rotary bearing for the spring element can move together with the first stop.

Abstract: A switching device has an encapsulation housing and lashing points. The lashing points are arranged in such a manner that a center of gravity of the switching device lies below the lashing points in a lashing direction.

Abstract: A processing assembly including cage, partition, two sub-cages, two motherboards, two switch boards and at least one bridge board. Partition is disposed in cage so as to divide inner space of cage into first accommodation space and second accommodation space. Two sub-cages are respectively disposed in first accommodation space and second accommodation space. Two motherboards are respectively disposed on two sub-cages. Two motherboards each include a plate and a plurality of processing units disposed on the plate. Two switch boards are respectively disposed on two sub-cages and respectively electrically connected to two motherboards. Bridge board is electrically connected to two motherboards. One of two motherboards is located between one of two switch boards and bridge board, and another one of two motherboards is located between another one of two switch boards and bridge board.