Abstract: A constant-temperature water supply system employing a carbon dioxide heat pump includes a primary side loop, a secondary side water supply pipeline, a carbon dioxide heat pump water heater in the primary side loop, and a heat exchanger between the primary side loop and the secondary side water supply pipeline; the temperature of return water is detected and the temperature of a return water tank is detected, so even if the temperature of return water flowing out of a first heat exchange tube fluctuates, the return water can be input at a position in the return water tank having a close temperature, such that water in the return water tank is always in a stably layered state, and therefore allows for constant-temperature water supply.

Abstract: A hot water system with transcritical carbon dioxide single-stage or double-stage compression and a control method therefor is provided. The hot water system includes a first-stage compressor, a first heat exchanger for exchanging heat with cooling water on user side, a second-stage compressor, a second heat exchanger for exchanging heat with the cooling water on user side, a third heat exchanger for exchanging heat between a liquid phase refrigerant and a gas phase refrigerant, an expansion valve, a fourth heat exchanger for exchanging heat with ambient air, a buffer water tank, a first proportional valve, a second proportional valve, a third proportional valve, a fourth proportional valve, a defrosting valve, and a refrigerant circuit bypass valve. The hot water system can switch between the single-stage compression ad the double-stage compression in high-temperature and low-temperature weather, ensuring that the system has good heating capacity and energy efficiency ratio.

Abstract: In a memory expansion method, a first network device generates a memory topology based on memory requirement information of a target application and usage of a memory resource in a first memory pool, wherein the first memory pool is a logical memory comprising memory resources provided by a plurality of network devices, and the memory topology indicates capacities of different types of memory resources in one or more network devices that need to be occupied by the target application. The network device then establishes a second memory pool in the first memory pool based on the memory topology, wherein the second memory pool comprises a memory resource that is allowed to be used by the target application.

Abstract: An aerosol generating device includes a conductor assembly and a microwave assembly. The conductor assembly includes a first conductor and a second conductor that jointly form a resonant cavity. The resonant cavity includes at least a heating region, and the heating region is configured to heat an aerosol generating article. The microwave assembly is configured to feed a microwave into the resonant cavity to generate an aerosol.

Abstract: In one example model training system, a second node is configured to send a plurality of parameter obtaining requests to a first node. The first node is configured to determine, based on the plurality of parameter obtaining requests, that parameters obtained based on the plurality of parameter obtaining requests are respectively stored in a first memory and a second memory, combine a parameter obtained from the first memory and a parameter obtained from the second memory to obtain a combined parameter, and send the combined parameter to the second node. The second node is further configured to receive the combined parameter, and train a model based on the combined parameter. The parameter obtained from the first memory and the parameter obtained from the second memory are combined and then sent.

Abstract: Embodiments of this application provide an antenna structure and an electronic device. The antenna structure may include a ground plane, a first radiator, and a first grounding member connected to the first radiator. The antenna structure may further include a second radiator, a third radiator, a second grounding member connected to the second radiator, and a third grounding member connected to the third radiator. A first slot is formed between a first end of the first radiator and a first end of the second radiator, and a second slot is formed between a second end of the second radiator and a second end of the third radiator.

Abstract: An example data processing system includes a first computing cluster, a second computing cluster, and a connection device. The first computing cluster includes a first computing device, and the second computing cluster includes a second computing device, and the connection device is connected to the first computing device. The connection device is configured to manage memory address information of the first computing cluster provided by the first computing device and memory address information of the second computing cluster provided by the second computing device. The first computing device is configured to receive an access request, where the access request is used to access memory space of the second computing device, search the memory address information of the second computing cluster managed by the connection device for an address of the memory space, and access the memory space of the second computing device based on the address.

Abstract: An antenna structure includes a first antenna, a second antenna, and a feeding point. A first radiator and a second radiator of the first antenna are axially symmetrically disposed relative to a perpendicular bisector between a first connection point and a second connection point. The other end of the first radiator and the other end of the second radiator are separately disposed in an extension manner in directions that are away from each other. One end of a second transmission line of the second antenna is electrically connected to the feeding point. The other end of the second transmission line is electrically connected to one end of a third radiator of the second antenna. The other end of the third radiator is grounded.

Abstract: A multi-parallel carbon dioxide heat pump control method based on target load control, wherein the multi-parallel carbon dioxide heat pump comprises a carbon dioxide circulation loop, a heat source pipeline and a hot water pipeline, and the control method comprises: adjusting the opening degree of an electronic expansion valve (3) according to the temperature of an inlet of the hot water pipeline, the temperature of an outlet of the hot water pipeline, the flow in the hot water pipeline and a target outlet temperature set by a user, such that the steady-state change of system pressure can be realized by adjusting the electronic expansion valve (3) on the basis of the fluctuation of parameters such as user side temperature and flow, thus a target outlet temperature change curve is rapidly and stably converged to a target value, and the outlet temperature can be rapidly stabilized.

Abstract: Example methods and network devices for order-preserving execution of a write request are disclosed. One example method is performed by a network device of a storage node. The example method includes receiving an order-preserving confirmation request, where the order-preserving confirmation request carries a first write address assigned for a first write request. It is confirmed that execution of a second write request for which a second write address has been assigned is not completed, where the second write address precedes the first write address. Sending feedback information for the order-preserving confirmation request is delayed.

Abstract: A converged system includes a computing node and a storage node. The computing node is connected to the storage node through a network to build a storage-computing decoupled architecture. A storage medium of the computing node and a storage medium of the storage node form a global memory pool through unified addressing, namely, a global storage medium shared by the computing node and the storage node. When a read/write operation is performed in the system, processing request data is obtained, and a memory operation of the processing request data is performed on the global memory pool based on a memory operation instruction.

Abstract: An antenna assembly includes a first radiator, a second radiator, a feeding structure, and a decoupling apparatus. The first radiator includes a first radiation branch and a second radiation branch that have opposite bending directions, and a first gap exists between the first radiation branch and the second radiation branch. The second radiator includes a third radiation branch and a fourth radiation branch that have opposite bending directions, and a second gap exists between the third radiation branch and the fourth radiation branch. The feeding structure is electrically coupled to the first radiation branch and the third radiation branch. The first radiator and the second radiator share a common part, the common part is a common branch, and the common branch is electrically coupled to a grounding terminal of the antenna assembly through the decoupling apparatus.

Abstract: A carbon dioxide overlapping type heating system and a control method therefor, in which the heating system includes a low-temperature-stage loop, high-temperature-stage loop and a heating loop, in which a temperature-stage compressor (3) and a high-temperature-stage compressor (7) are both variable-frequency compressors; and a water pump (10) is a variable-frequency water pump.

Abstract: A hot water system with transcritical carbon dioxide single-stage or double-stage compression and a control method therefor is provided. The hot water system includes a first-stage compressor, a first heat exchanger for exchanging heat with cooling water on user side, a second-stage compressor, a second heat exchanger for exchanging heat with the cooling water on user side, a third heat exchanger for exchanging heat between a liquid phase refrigerant and a gas phase refrigerant, an expansion valve, a fourth heat exchanger for exchanging heat with ambient air, a buffer water tank, a first proportional valve, a second proportional valve, a third proportional valve, a fourth proportional valve, a defrosting valve, and a refrigerant circuit bypass valve. The hot water system can switch between the single-stage compression ad the double-stage compression in high-temperature and low-temperature weather, ensuring that the system has good heating capacity and energy efficiency ratio.

Abstract: A network connection method is provided. The network connection method includes: transmitting a detection instruction in a preset format to a second network device to instruct the second network device to query second network address information conforming to a standard of the detection instruction according to the protocol identification information; receiving the second network address information fed back by the second network device according to the first network address information, and connecting to the second network device according to the second network address information. According to the network connection method in the present application, network address information of other network devices can also be obtained by only sending an unidirectional detection instruction although other network devices are unknown to the first network device, so that these network devices can be conveniently connected through a network application.

Abstract: A control device is configured to control a computing device to perform big data distributed processing. The computing device is equipped with storage media in a plurality of deployment modes. The storage media include at least two of a local storage medium in the computing device, a global storage medium formed based on the local storage medium, an extended global storage medium, and an extended local storage medium. The control device obtains a service request for a big data service, determines storage media in at least one deployment mode from the storage media in the plurality of deployment modes, sends a control indication to the computing device, to indicate the computing device to execute a map (map) task in big data distributed processing on service data included in the service request, and stores obtained intermediate data in the storage media in the at least one deployment mode.

Abstract: A server cluster determines a first memory requirement of a first distributed application, where the first memory requirement indicates a memory size. The server cluster determines N first server nodes in the server cluster based on the first memory requirement and an available memory resource of each server node in the server cluster, and constructs a first memory pool based on the N first server nodes. The server cluster provides a service for the first distributed application based on the first memory pool.