Abstract: Systems and methods are provided for vector-quantized image modeling using vision transformers and improved codebook handling. In particular, the present disclosure provides a Vector-quantized Image Modeling (VIM) approach that involves pretraining a machine learning model (e.g., Transformer model) to predict rasterized image tokens autoregressively. The discrete image tokens can be encoded from a learned Vision-Transformer-based VQGAN (example implementations of which can be referred to as ViT-VQGAN). The present disclosure proposes multiple improvements over vanilla VQGAN from architecture to codebook learning, yielding better efficiency and reconstruction fidelity. The improved ViT-VQGAN further improves vector-quantized image modeling tasks, including unconditional image generation, conditioned image generation (e.g., class-conditioned image generation), and unsupervised representation learning.

Abstract: This application discloses network congestion control methods and apparatuses. In an implementation, a method comprises: obtaining, by the an intelligent network interface card comprised in a network congestion control apparatus, at least two types of traffic. Identifying, by the intelligent network interface card, algorithm matching features of the at least two types of traffic, and in response to determining to perform congestion control on one type of traffic of the at least two types of traffic, determining, by the intelligent network interface card, a congestion control algorithm that matches an algorithm matching feature of the one type of traffic. Performing, by the intelligent network interface card, congestion control on the one type of traffic according to the congestion control algorithm that matches the algorithm matching feature of the one type of traffic.

Abstract: A modified nucleoside or nucleotide, the 3?-OH of the modified nucleoside or nucleotide being reversibly blocked; meanwhile, the present invention also relates to a kit comprising the nucleoside or nucleotide, and a sequencing method based on the nucleoside or nucleotide.

Abstract: A congestion control method and an apparatus are disclosed. The method includes: after a sending device generates an unscheduled data packet of a first flow, if it is determined, based on an unscheduled packet send window shared by all flows, that the unscheduled data packet meets a sending condition, determining whether to request to add a quota for at least one of the unscheduled packet send window and a scheduled packet send window corresponding to the first flow; and if it is determined that the quota is requested to be added for the at least one of the unscheduled packet send window and the scheduled packet send window corresponding to the first flow, setting indication information in the unscheduled data packet, and sending, to a receiving device, the unscheduled data packet in which the indication information is set.

Abstract: A method for isolating an electrical fault in a floating High Voltage direct current (DC) system is provided. The method includes receiving a measurement of an output voltage of a High Voltage DC bus and receiving a measurement of a load current for each of a plurality of channels coupled to the High Voltage DC bus. The method also includes, when the output voltage is determined to be out of balance, comparing the measurement of the load current of each of the plurality of channels in the frequency domain, and, flagging one channel of the plurality of channels as a faulty channel based on the comparing the measurement of the load currents in the frequency domain.

Abstract: Systems and methods for voltage regulation of high voltage direct current systems are provided. In certain embodiments, a system includes a generator that generates alternating current (AC) voltage. The system further includes a power converter that converts the AC voltage into regulated direct current (DC) voltage. Also, the system includes a voltage regulator. In additional embodiments, the voltage regulator includes an AC voltage regulator that regulates the AC voltage generated by the generator. Also, the voltage regulator includes a DC voltage regulator that regulates the DC voltage produced by the power converter. Moreover, the voltage regulator includes a regulator selector that selectively activates one of the AC voltage regulator and the DC voltage regulator based on a current from the power converter and at least one of a voltage of the generator and a voltage of the power converter.

Abstract: A congestion control method and an apparatus are disclosed. The method includes: after a sending device generates an unscheduled data packet of a first flow, if it is determined, based on an unscheduled packet send window shared by all flows, that the unscheduled data packet meets a sending condition, determining whether to request to add a quota for at least one of the unscheduled packet send window and a scheduled packet send window corresponding to the first flow; and if it is determined that the quota is requested to be added for the at least one of the unscheduled packet send window and the scheduled packet send window corresponding to the first flow, setting indication information in the unscheduled data packet, and sending, to a receiving device, the unscheduled data packet in which the indication information is set.

Abstract: Systems and methods for voltage regulation of high voltage direct current systems are provided. In certain embodiments, a system includes a generator that generates alternating current (AC) voltage. The system further includes a power converter that converts the AC voltage into regulated direct current (DC) voltage. Also, the system includes a voltage regulator. In additional embodiments, the voltage regulator includes an AC voltage regulator that regulates the AC voltage generated by the generator. Also, the voltage regulator includes a DC voltage regulator that regulates the DC voltage produced by the power converter. Moreover, the voltage regulator includes a regulator selector that selectively activates one of the AC voltage regulator and the DC voltage regulator based on a current from the power converter and at least one of a voltage of the generator and a voltage of the power converter.

Abstract: The present invention relates to a technical field of functional materials, and in particular to a high-strength dissolvable aluminum alloy and a preparation method therefor. In order to solve the problem of a relatively low strength of the existing dissolvable materials, a high-strength dissolvable aluminum alloy material and a preparation method therefor are provided. The raw materials of the high-strength dissolvable aluminum alloy comprise: aluminum, a functional metal, and a metal oxide; the addition amounts of the aluminum and the functional metals are: 60-99 wt. % of aluminum, 0.9-39.9 wt. % of the functional metals; and the addition amount of the metal oxide is: 0.01-11 wt. %. The high-strength dissolvable aluminum alloy can not only meet the usage requirements of high mechanical strength in service, but can also rapidly degrade after the service is completed. In addition, the preparation method of this material is simple, low in cost, and easy for large-scale production.

Abstract: A method of defrosting an indoor coil in a refrigeration system including, while the system is operating in the refrigeration mode, with a controller of the refrigeration system, determining a defrost commencement time at which the refrigeration system is to commence operating in the defrost mode. With the controller, one or more defrost energy conservation processes are initiated prior to the defrost commencement time, to decrease a rate at which thermal energy is transferred from the refrigerant in the outdoor coil to ambient air around the outdoor coil. The defrost energy conservation process continues until a defrost energy conservation termination criterion is satisfied, at which time the defrost energy conservation process is terminated. Upon termination of the defrost energy conservation process, operation of the refrigeration system in the defrost mode is commenced.

Abstract: A method of defrosting an indoor coil in a refrigeration system in which, with a controller of the refrigeration system, a selected one of a number of predetermined defrost mode procedures is selected. Each predetermined defrost mode procedure is associated with a predetermined range of values of one or more predetermined parameters. Each predetermined defrost mode procedure includes adjustment of one or more components of the refrigeration system upon commencement of the defrost mode for optimum operation of the refrigeration system in the defrost mode, when the predetermined parameter is within the predetermined range of values upon commencement of operation in the defrost mode. With the controller, the component of the refrigeration system is adjusted in accordance with the selected one of the predetermined defrost mode procedures.

Abstract: A refrigeration system in which a refrigerant is circulatable, the refrigeration system including an indoor coil assembly with an indoor coil and a suction header subassembly connected with indoor coil circuits of the indoor coil. The suction header subassembly includes a hollow suction header body defining a suction header bore therein and one or more extended spigots defining an extended spigot bore therein for directing the refrigerant into a selected one of the indoor coil circuits when operating in a defrost mode. The extended spigot includes an open inner end that is located in the suction header bore to receive a portion of the refrigerant flowing therethrough when the refrigeration system is operating in the defrost mode.

Abstract: A method of defrosting an indoor coil in a refrigeration system including, while the system is operating in the refrigeration mode, with a controller of the refrigeration system, determining a defrost commencement time at which the refrigeration system is to commence operating in the defrost mode. With the controller, one or more defrost energy conservation processes are initiated prior to the defrost commencement time, to decrease a rate at which thermal energy is transferred from the refrigerant in the outdoor coil to ambient air around the outdoor coil. The defrost energy conservation process continues until a defrost energy conservation termination criterion is satisfied, at which time the defrost energy conservation process is terminated. Upon termination of the defrost energy conservation process, operation of the refrigeration system in the defrost mode is commenced.

Abstract: A method of defrosting an indoor coil in a refrigeration system in which, with a controller of the refrigeration system, a selected one of a number of predetermined defrost mode procedures is selected. Each predetermined defrost mode procedure is associated with a predetermined range of values of one or more predetermined parameters. Each predetermined defrost mode procedure includes adjustment of one or more components of the refrigeration system upon commencement of the defrost mode for optimum operation of the refrigeration system in the defrost mode, when the predetermined parameter is within the predetermined range of values upon commencement of operation in the defrost mode. With the controller, the component of the refrigeration system is adjusted in accordance with the selected one of the predetermined defrost mode procedures.

Abstract: The present invention relates to a technical field of functional materials, and in particular to a high-strength dissolvable aluminum alloy and a preparation method therefor. In order to solve the problem of a relatively low strength of the existing dissolvable materials, a high-strength dissolvable aluminum alloy material and a preparation method therefor are provided. The raw materials of the high-strength dissolvable aluminum alloy comprise: aluminum, a functional metal, and a metal oxide; the addition amounts of the aluminum and the functional metals are: 60-99 wt. % of aluminum, 0.9-39.9 wt. % of the functional metals; and the addition amount of the metal oxide is: 0.01-11 wt. %. The high-strength dissolvable aluminum alloy can not only meet the usage requirements of high mechanical strength in service, but can also rapidly degrade after the service is completed. In addition, the preparation method of this material is simple, low in cost, and easy for large-scale production.

Abstract: A Sound Attenuation Module and Oversized Grill is disclosed which prevents noise generated by an HVAC system from traveling through the duct system and into the room to which the air is directed. The goal is accomplished by use of oversized duct grills and an module placed between the wall and HVAC System, and uses an enclosure designed to expand the distance that the noise must travel.

Abstract: A simulator (12) having at least one input (24) and first and second outputs (30, 34) includes an inverter model (22) receiving gating signals at the at least one input (24) and producing current and voltage signals based on said gating signals and a machine model (26) receiving the current and voltage signals from the inverter model (24) and producing a machine current signal at the first output (30) and a machine position signal at the second output (34). Also a method of providing feedback to a machine controller using a simulator.

Abstract: A refrigeration system including a direct expansion evaporator with a substantially vertical header through which a fluid mixture of a refrigerant and oil is pumped, a compressor for compressing the refrigerant, and a suction tube in fluid communication with the header and the compressor through which a stream of a first fluid mixture is drawn substantially in a first direction from the header by the compressor. The first fluid mixture exerts a first fluid pressure in a second direction substantially opposite to the first direction. A second fluid mixture is located in the header and subject to a second fluid pressure substantially greater than the first fluid pressure to create a pressure differential. The system also includes an extraction apparatus with a passage subject to the pressure differential, through which passage the second fluid mixture is drawn into the suction tube.

Abstract: A refrigeration system including a direct expansion evaporator with a substantially vertical header through which a fluid mixture of a refrigerant and oil is pumped, a compressor for compressing the refrigerant, and a suction tube in fluid communication with the header and the compressor through which a stream of a first fluid mixture is drawn substantially in a first direction from the header by the compressor. The first fluid mixture exerts a first fluid pressure in a second direction substantially opposite to the first direction. A second fluid mixture is located in the header and subject to a second fluid pressure substantially greater than the first fluid pressure to create a pressure differential. The system also includes an extraction apparatus with a passage subject to the pressure differential, through which passage the second fluid mixture is drawn into the suction tube.