Abstract: A plurality of measurement signals may be evaluated to detect a poorly damped oscillation mode in an electric power delivery system. An oscillation mode of interest may be detected, and the oscillation mode of interest may be analyzed using a frequency transform. A plurality of amplitudes of the oscillation mode of interest in each measurement signal may be determined using a sliding window. The plurality of amplitudes may be used to calculate a damping of the oscillation mode of interest. The damping may be calculated solving a linearized system of equations. The linearized system of equations may be a least square estimate of the damping based on the logarithm of each amplitude. If the damping indicates that the oscillation mode of interest is poorly damped, a control action may be taken.

Abstract: For processing eye tissue using a pulsed laser beam (L), an ophthalmological device includes a projection optical unit for the focused projection of the laser beam (L) into the eye tissue, and a scanner system upstream of the projection optical unit for the beam-deflecting scanning of the eye tissue with the laser beam (L) in a scanning movement (s?) performed over a scanning angle along a scanning line (s). The ophthalmological device includes a divergence modulator disposed upstream of the scanner system for dynamically varying the divergence of the laser beam (L), whereby the scanning line (s) is tilted in a plane running through the optical axis of the projection optical unit and the scanning line(s). The tilting of the scanning line(s) enables a displacement—dependent on the scanning angle—of the focus of the laser pulses projected into the eye tissue without vertical displacement of the projection optical unit.

Abstract: A load-bearing structure of a motor vehicle, having hollow profiles and junction elements to connect the hollow profiles. The hollow profiles may be fastened in receptacles of the junction elements, and the junction elements may have a plurality of of areal webs in a vehicle vertical direction, at least some of the areal webs forming a framework structure which assists the load path in the respective junction element.

Abstract: A method of operating a lighting device positioned in an environment that includes acquiring lighting data corresponding to an environment using one or more sensing devices. The one or more sensing devices are communicatively coupled to a processor and a lighting device is positioned in the environment. The method further includes determining from the lighting data, by the processor, a lighting condition of the environment, acquiring presence data corresponding to a presence of one or more individuals in the environment using the one or more sensing devices, determining from the presence data, by the processor, a number of individuals present in the environment, and generating, by the processor, an actuation signal receivable by the lighting device to actuate the lighting device based on the lighting condition of the environment and the presence of both a registered individual and one or more additional individuals in the environment.

Abstract: The present disclosure is directed at methods, systems, and techniques for managing batteries for use in a downhole drilling application. The system includes a power bus, pairs of battery terminals for connecting to batteries, switching circuitry that connects and disconnects the batteries to the power bus, data collection circuitry that obtains battery parameters obtained during system operation, and a controller that controls the switching circuitry and receives the battery parameters. A control line connects the controller to the switching circuitry and a data line connects the controller to the data collection circuitry, with the control and data lines being distinct such that control and data signals are not multiplexed with each other.

Abstract: An oil pan assembly and an engine assembly having a vortex generating unit configured to de-aerate entrained oil before reaching the intake pipe is provided. The oil pan assembly includes an inner plate mounted to the oil pan so as to be disposed between the oil pan and a bottom surface of the engine block. The vortex generating unit is disposed on the inner plate and generates a vortex which de-aerates entrained oil.

Abstract: Described herein are semiconductor packages having an insulating layer and the manufacturing methods thereof, wherein semiconductor packages include a die pad; a plurality of leads surrounding the die pad, wherein each of the leads comprises an inner lead portion and an outer lead portion, and wherein at least one lead further comprises a trace portion; a chip disposed on the die pad and electrically connected to the leads; a molding compound encapsulating the chip, the inner lead portions and the trace portion, where the outer lead portions and a first surface of the trace portion are exposed from the molding compound; and an insulating layer covering the first surface of the trace portion.

Abstract: A heat pipe based passive residual heat removal system for a spent fuel pool (3). Partitions (6) are arranged around an inside of the spent fuel pool. Evaporation-end heat pipes (4) are arranged between the outside of the partitions and an inner wail of the pool. The evaporation-end heat pipes have outlets that extend beyond the pool and are connected to an Inlet of an ascending pipe (10), and have inlets connected to an outlet of a descending pipe (5). Condensation-end heat pipes (7) have inlets connected to an outlet of the ascending pipe, and have outlets connected to an inlet of the descending pipe. The heat pipes cool the spent fuel pool. A heat exchange by phase change of working medium in the heat pipe leads to heat exchange of low temperature difference and high efficiency, relying on density difference for natural circulation drive.

Abstract: A nozzle for cleaning-in-place of a vessel has a nozzle body to be connected to a wall of the vessel and defining an opening, a nozzle insert is contained within the nozzle body and is able to assume at least two distinct positions relative to the nozzle body, a first position in which the nozzle insert is retracted into the nozzle body and a second position in which the nozzle insert is advanced in the axial direction relative to the nozzle body and protrudes into the vessel. Apertures are exposed in the second position to allow distribution of a cleaning fluid. The nozzle insert has two nozzle insert parts, in mutual abutment in the first position and spaced from each other in a direction transverse to the axial direction in the second position to form a gap between adjacent nozzle insert parts, the apertures being exposed in the gap.

Abstract: A shutter valve for regulating pressure and controlling fluid flow comprising an actuator ring having a plurality of gear teeth, the gear teeth driven by a mating gear or other means. A plurality of obturator pin bosses, each pin boss affixed within an inside circumference of the actuator ring, the pin boss further comprising a hinge pin aperture. The shutter valve further comprises three or more obturator elements, each obturator element defining a petal shape structure including a tongue and groove feature along at least a portion of an outside circumference thereof, and wherein each obturator element is hingedly coupled to a hinge pin aperture of an obturator pin boss. A hook element is located at an apex of said petal shape structure of each obturator element. The shutter value further includes a housing defining a cavity or holding the actuator ring and the three or more obturator elements.

Abstract: A carbonaceous substance powder gasification system and gasification method. The system comprises a carbonaceous substance reaction apparatus and a gas return apparatus used for raising the pressure of some of a raw syngas cooled and preliminarily purified downstream of the reaction apparatus, then blending with high-temperature raw syngas upstream of the reaction apparatus and reducing the temperature.

Abstract: Generation of cockling is suppressed to enable superior image quality printing. An inkjet printing device is provided with a head discharging ultraviolet curing ink onto a medium, pinning irradiation sections irradiating the ultraviolet curing ink on the medium with light, and a curing irradiation section arranged on a downstream side of the pinning irradiation sections in a conveying direction of the medium, and radiating light with a shorter wavelength than the pinning irradiation sections.

Abstract: The present invention provides an apparatus and a method for high deposition welding a horizontal butt joint which can form a high deposition welded part while forming a root part when high deposition welding is carried out relative to a bevel in case of automatic welding of a horizontal butt joint, thereby achieving high deposition welding without any defect of the inside and surface of a welded cross section and reducing the number of welding passes. The horizontal butt joint high deposition welding apparatus is installed on a traveling device part in a welding direction by a welding tip so as to move in a forward direction of welding progress and a horizontal butt joint high deposition welding method, thereby preventing the molten metal from running down, allowing a user to easily handle the apparatus, reducing weight, and completing surface beads because a lower part is filled with molten metal.

Abstract: A method for charging a modular multilevel converter includes: firstly, electrifying DC side of a converter; after voltages of submodules are stabilized, deblocking the converter, turning on all the submodules, then reducing the number of turned on submodules in phase unit; when over-current occurs on a bridge arm, temporarily increasing the number of turned on submodules to suppress the over-current; after the voltages of the sub-modules are stabilized, continuously reducing the number of the turned on submodules until the number of the turned on submodules in the phase unit is finally equal to the number of working submodules of the bridge arm, so as to smoothly transit to a normal operation state. The DC side is charged, such that the voltages of the submodules reach a working voltage before the converter normally operates, and an impacting current is avoided in the charging process by using a proper control strategy.

Abstract: A heat transfer system (100) for transferring heat from at least one electrical cell (124, 125, 126, 127). In particular, but not exclusively, the invention may be embodied as a heat transfer system (100) for transferring heat from at least one electrical cell (124, 125, 126, 127), the heat transfer system (100) comprising a generally planar and substantially flexible cooling bladder (107) comprising an internal fluid channel (117), wherein the bladder (107) is configured to be thermally coupled with an electrical connector (102), such as the terminal (128), of an electrical cell (124, 125, 126, 127) such that heat may be transferred from the electrical connector (102), or terminal (128), to said fluid channel (117).

Abstract: A three-dimensional object is provided that achieves adequate hardness while suppressing volume shrinkage. Used as an ink that forms a modeling material are at least two types of photo-curing inks curable by being irradiated with light and having degrees of hardness that mutually differ in eight hours after being irradiated with light. The at least two types of photo-curing inks are discharged in a manner that dots of these photo-curing inks are mixedly present.

Abstract: To provide an inkjet printer and a printing method that can print a new pattern to be printed at an appropriate position relative to an existing pattern. An inkjet printer newly prints a new pattern to be printed, that is different from an existing pattern, on an outer surface of a spherical print object on which the existing pattern is printed. The inkjet printer includes a retainer that retains the print object, a carriage, and a projector. The carriage prints the new pattern to be printed on the outer surface of the print object. The projector projects at least a part of the existing pattern and the new pattern to be printed together on the outer surface of the print object retained by the retainer.

Abstract: An apparatus and a method are provided for an air filter cleaning wand for flushing contaminants from an intake air filter of an automobile engine. The air filter cleaning wand comprises a proximal flange, a conduit, and a distal end portion. The proximal flange is configured to receive a nozzle of a water hose. An interior of the conduit is in fluid communication with the proximal flange. The distal end portion comprises a plurality of longitudinally aligned vents in fluid communication with the interior of the conduit. Upon passing water through the water hose and into the conduit, pressurized water streams exit the vents along the distal end portion so as to flush contaminants from the air filter. The air filter cleaning wand advantageously is comprised of a material which is sufficiently durable and temperature resistant to retain its configuration during operation when coupled to pressurized water sources.

Abstract: A power supply apparatus of an offshore plant comprises: an AC/DC converter converting alternating current produced from a generator into direct current and supplying the direct current to a DC bus; a power load connected to the DC bus so as to regenerate power; a first DC/DC converter connected to the DC bus; a second DC/DC converter connected to the DC bus; a first power storage unit connected to the first DC/DC converter and storing power when a voltage of the DC bus is maintained at a level of a first threshold value or higher for a first time period; and a first resistance unit connected to the second DC/DC converter and consuming power when the voltage of the DC bus is maintained at the level of the first threshold value or higher for a second time period. The second time period is longer than the first time period.

Abstract: A shape morphing fuselage and method of transitioning an aerocar from a land mode to a flight mode are disclosed. The fuselage includes a plurality of flexible frame members and tensile skin extending between the plurality of flexible frame members as well as an actuation system configured to bend the plurality of flexible frame members between a contracted configuration associated with a flight mode and an expanded configuration associated with a land mode. The fuselage can also include a hatch pivotable about an axis of one of the flexible frame members in the expanded configuration and configured to open for deployment and retraction of wings for the aerocar.