Abstract: A fluid heating system including a burner unit is operated based on feedback control loops. The fluid heating system comprises a burner unit configured to heat a fluid, a sensor configured to sense a characteristic of the appliance, and a controller coupled to the burner unit and the sensor. The controller includes an electronic processor and a memory. The controller is configured to receive a first signal corresponding to the characteristic from the sensor, determine, based on the first signal, a first feedback loop control, control combustion of the burner unit based on the first feedback loop control, determine, based on the first feedback loop control, a second feedback loop control, and control combustion of the burner unit based on the second feedback loop control.

Abstract: A nanomagnetic inductor core that includes: a porous, electrically-insulating template having high-permeability material in the pores thereof to constitute elongated nanowires, and wherein the elongated nanowires are segmented along their axial direction; and a segment of dielectric material interposed between adjacent segments of the high-permeability material along the axial direction of the nanowire; wherein each segment of the high-permeability material has a length, in the axial direction of the nanowire, no greater than a size of a single magnetic domain, and wherein a maximal cross-sectional dimension of the nanowire is no greater than the size of the single magnetic domain. Inductors and LC interposers using such nanomagnetic inductor cores, as well as associated fabrication methods.

Abstract: A fluid heating system including a burner unit is operated based on feedback control loops. The fluid heating system comprises a burner unit configured to heat a fluid, a sensor configured to sense a characteristic of the appliance, and a controller coupled to the burner unit and the sensor. The controller includes an electronic processor and a memory. The controller is configured to receive a first signal corresponding to the characteristic from the sensor, determine, based on the first signal, a first feedback loop control, control combustion of the burner unit based on the first feedback loop control, determine, based on the first feedback loop control, a second feedback loop control, and control combustion of the burner unit based on the second feedback loop control.

Abstract: A distributed LC filter structure is disclosed. The distributed LC filter structure provides simultaneously a distributed inductance and a distributed capacitance in the same structure. Accordingly, discrete passive elements are eliminated and high, homogenous integration is achieved. Interconnections between the distributed inductance and the distributed capacitance are tailored to leverage a parasitic inductance of the distributed capacitance to increase the overall inductance of the distributed LC filter structure. Similarly, the interconnections are tailored to leverage a parasitic capacitance resulting from the distributed inductance to add up with the distributed capacitance augmenting the overall capacitance of the structure.

Abstract: A water heater includes an inner water tube coil and an outer water tube coil separated by a drum baffle. The inner and outer coils extend above a top edge of the drum baffle by at least a full turn of each coil. A flue gas bypass path is defined between a top edge of the drum baffle and a top insulation layer above the inner and outer coils. Flue gases flow radially though the inner coil, up along the drum baffle, through the flue gas bypass path, and downwardly over the outer coil to heat water flowing through the inner and outer coils. The water flows into the outer coil at the bottom of the coil, winds upwardly through the outer coil in countercurrent flow with respect to the flue gases, then down through the inner coil.

Abstract: A water heater includes an inner water tube coil and an outer water tube coil separated by a drum baffle. The inner and outer coils extend above a top edge of the drum baffle by at least a full turn of each coil. A flue gas bypass path is defined between a top edge of the drum baffle and a top insulation layer above the inner and outer coils. Flue gases flow radially though the inner coil, up along the drum baffle, through the flue gas bypass path, and downwardly over the outer coil to heat water flowing through the inner and outer coils. The water flows into the outer coil at the bottom of the coil, winds upwardly through the outer coil in countercurrent flow with respect to the flue gases, then down through the inner coil.

Abstract: A fluid heating system including a burner unit is operated based on feedback control loops. The fluid heating system comprises a burner unit configured to heat a fluid, a sensor configured to sense a characteristic of the appliance, and a controller coupled to the burner unit and the sensor. The controller includes an electronic processor and a memory. The controller is configured to receive a first signal corresponding to the characteristic from the sensor, determine, based on the first signal, a first feedback loop control, control combustion of the burner unit based on the first feedback loop control, determine, based on the first feedback loop control, a second feedback loop control, and control combustion of the burner unit based on the second feedback loop control.

Abstract: A nanomagnetic inductor core that includes: a porous, electrically-insulating template having high-permeability material in the pores thereof to constitute elongated nanowires, and wherein the elongated nanowires are segmented along their axial direction; and a segment of dielectric material interposed between adjacent segments of the high-permeability material along the axial direction of the nanowire; wherein each segment of the high-permeability material has a length, in the axial direction of the nanowire, no greater than a size of a single magnetic domain, and wherein a maximal cross-sectional dimension of the nanowire is no greater than the size of the single magnetic domain. Inductors and LC interposers using such nanomagnetic inductor cores, as well as associated fabrication methods.

Abstract: A method for operating a real-time time series prediction model includes obtaining a first sequence corresponding to a target time series; obtaining a second sequence corresponding to a peer time series of the target time series; determining whether a predetermined number of time steps have elapsed since a last retraining of the real-time time series prediction model; and if the predetermined number of time steps have elapsed since the last retraining of the time series prediction model, retraining the real-time time series prediction model using a first portion of the first and second sequences; and applying a remaining portion of the first and second sequences to the real-time time series prediction model to predict a next value of the target time series.

Abstract: A distributed LC filter structure is disclosed. The distributed LC filter structure provides simultaneously a distributed inductance and a distributed capacitance in the same structure. Accordingly, discrete passive elements are eliminated and high, homogenous integration is achieved. Interconnections between the distributed inductance and the distributed capacitance are tailored to leverage a parasitic inductance of the distributed capacitance to increase the overall inductance of the distributed LC filter structure. Similarly, the interconnections are tailored to leverage a parasitic capacitance resulting from the distributed inductance to add up with the distributed capacitance augmenting the overall capacitance of the structure.

Abstract: A distributed LC filter structure is disclosed. The distributed LC filter structure provides simultaneously a distributed inductance and a distributed capacitance in the same structure. Accordingly, discrete passive elements are eliminated and high, homogenous integration is achieved. Interconnections between the distributed inductance and the distributed capacitance are tailored to leverage a parasitic inductance of the distributed capacitance to increase the overall inductance of the distributed LC filter structure. Similarly, the interconnections are tailored to leverage a parasitic capacitance resulting from the distributed inductance to add up with the distributed capacitance augmenting the overall capacitance of the structure.

Abstract: A distributed LC filter structure is disclosed. The distributed LC filter structure provides simultaneously a distributed inductance and a distributed capacitance in the same structure. Accordingly, discrete passive elements are eliminated and high, homogenous integration is achieved. Interconnections between the distributed inductance and the distributed capacitance are tailored to leverage a parasitic inductance of the distributed capacitance to increase the overall inductance of the distributed LC filter structure. Similarly, the interconnections are tailored to leverage a parasitic capacitance resulting from the distributed inductance to add up with the distributed capacitance augmenting the overall capacitance of the structure.

Abstract: Embodiments of the present disclosure may provide a perforation tool and method for operating the perforation tool. The perforation tool may include one or more firing heads and one or more gun assemblies. The perforation tool may also include a release mechanism coupled to the one or more firing head and the one or more gun assemblies. The release mechanism may release the one or more gun assemblies to a bottom of a wellbore upon firing of the one or more gun assemblies and maintain the one or more firing heads on the perforation tool.

Abstract: A technique facilitates efficient punching and cutting of a tubing with a single trip downhole. A cutter and a puncher are combined and conveyed together downhole into a borehole, e.g. a wellbore. The cutter and puncher may be conveyed downhole via a suitable well string. A communications line may be routed to both the cutter and the puncher to enable selective actuation of the cutter and the puncher. For example, the puncher may initially be actuated by detonating a shaped charge to perforate through the tubing in the borehole. Subsequently, the cutter may be operated to sever the tubing. In some applications, the cutter may be replaced with another tool operatively coupled with the communications line.

Abstract: A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.

Abstract: A technique facilitates on-demand release of desired sections of a well string, e.g. sections of a perforating gun string, via at least one on-demand release tool. The on-demand release tool has an activation mechanism which may be selectively actuated to transition the on-demand release tool from a first loadbearing configuration to a second loadbearing configuration. The on-demand release tool may then be transitioned to a release stage which allows a first section of the on-demand release tool to be separated from a second section of the on-demand release tool by activating a release mechanism. In at least some applications, the on-demand release tool also comprises a ballistic transfer device to enable reliable ballistic transfer between sections of the perforating gun string.

Abstract: A technique facilitates efficient punching and cutting of a tubing with a single trip downhole. A cutter and a puncher are combined and conveyed together downhole into a borehole, e.g. a wellbore. The cutter and puncher may be conveyed downhole via a suitable well string. A communications line may be routed to both the cutter and the puncher to enable selective actuation of the cutter and the puncher. For example, the puncher may initially be actuated by detonating a shaped charge to perforate through the tubing in the borehole. Subsequently, the cutter may be operated to sever the tubing. In some applications, the cutter may be replaced with another tool operatively coupled with the communications line.

Abstract: A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.

Abstract: A modulating burner apparatus includes a burner and a blower placed upstream of the burner. A venturi is placed upstream of the blower. A damper valve is placed upstream of the venturi. The damper valve has an open position and a restricted position. A smaller gas valve and a larger gas valve are communicated with the venturi. A controller is operably associated with the system to select a position of the damper valve and to select the appropriate one of the gas valves so as to provide a low output operation mode and a high output operation mode, which in combination provide an overall turndown ratio of at least 25:1.

Abstract: Embodiments of the present disclosure may provide a perforation tool and method for operating the perforation tool. The perforation tool may include one or more firing heads and one or more gun assemblies. The perforation tool may also include a release mechanism coupled to the one or more firing head and the one or more gun assemblies. The release mechanism may release the one or more gun assemblies to a bottom of a wellbore upon firing of the one or more gun assemblies and maintain the one or more firing heads on the perforation tool.