Abstract: A pressure stabilizing cavum includes multiple PE pipes and a backing plate. The multiple PE pipes are inserted through a longitudinal keel of the ship. Each PE pipe is provided with a first opening. Both two sides of the each PE pipe in the width direction of the first opening are connected to a hull bottom plate of the ship to form a pressure stabilizing cavum. The backing plate is located between the each PE pipe and the hull bottom plate and is sealingly connected to the each PE pipe and the hull bottom plate. The backing plate is provided with a first through hole, and the hull bottom plate is provided with a second through hole communicating with the first through hole, and the pressure stabilizing cavum communicates with the outside of the ship through the first through hole and the second through hole.

Abstract: A crane counterweight block alignment detection and control method, a crane counterweight block alignment detection and control device, and a crane. The crane counterweight block alignment detection and control method comprise: a counterweight block being provided with mounting holes for matching with positioning pins on a crane, detecting the center position of the counterweight block, and calculating the relative offset between the center position and the position of the positioning pins; detecting the relative positions of the mounting holes in the counterweight block and the positioning pins, and calculating, according to the positions, a relative rotation angle of the counterweight block for aligning the mounting holes with the positioning pins; and controlling, according to the relative offset and relative rotation angle, the movement of the counterweight block to enable the mounting holes in the counterweight block to be aligned with and installed onto the positioning pins.

Abstract: A wet-type air cleaner comprises a storage tank, a filter tank, a housing, a gas collecting structure, a turbine, and a plurality of brackets. The storage tank comprises a spray pipe and a water transmission pipe. The filter tank has a top portion, at least two side portions, and a bottom portion, and comprises an air outlet; at least two side covers; a plurality of filter layer; and a sewage pipe. The housing comprises an inlet; a vertical body; a circular body; and a horizontal body having a plurality of pores; reinforcing structure; and at least one outfall. The turbine comprises a power source, wherein the water transmission pipe extends into the filter tank, the spray pipe extends to the inlet of the housing, the circular body is located below the storage tank and above the filter tank, a height of a part of the vertical body overlaps with the height of the plurality of filter layers, and a height of the horizontal body is located below the height of the plurality of filter layer.

Abstract: Disclosed are methods for inducing polyploidization of megakaryocyte cells and for promoting differentiation of megakaryocyte cells into platelet-producing cells. The methods may be utilized for treating blood and bone marrow diseases and disorders in a subject in need thereof and for identifying agents for treating blood and bone marrow diseases and disorders.

Abstract: Disclosed are methods for inducing polyploidization of megakaryocyte cells and for promoting differentiation of megakaryocyte cells into platelet-producing cells. The methods may be utilized for treating blood and bone marrow diseases and disorders in a subject in need thereof and for identifying agents for treating blood and bone marrow diseases and disorders.

Abstract: The present invention relates to an electronic ballast for driving a fluorescent lamp or the like, and more particularly to a new topology ballast that has only one switch in its oscillating part. The new ballast is an improvement over the conventional half-bridge structure, having a reduced number and size of key components, as compared to conventional designs.

Abstract: A resonant switching converter comprising a first pair of series connected switches comprising a high side switch and a low side switch coupled across a DC input voltage, there being a first switched node between the switches; a second pair of series connected switches comprising a high side switch and a low side switch coupled across a DC bus, there being a second switched node between the switches; a DC bus capacitor coupled across the DC bus; the first and second switched nodes adapted to have a load coupled therebetween; the high side switch of the first pair of switches supplying current to the load from the DC input voltage, the low side switch of the first pair of switches being switched opposite the high side switch of the first pair of switches and providing a re-circulation path to allow bi-directional current flow through the load; the high side switch of the second pair of switches supplying current to the load from the DC bus capacitor, the low side switch of the second pair of switches being swi

Abstract: A ballast control circuit for multiple lamps comprising a ballast control circuit for driving two series connected switches of a lamp ballast connected across a supply potential and having a switched node between the switches; the switched node adapted to be connected to an output circuit comprising a plurality of parallel connected lamps; the control circuit comprising an oscillator, the output circuit comprising the plurality of parallel connected lamps including inductive and capacitive components and having a resonance frequency that is dependent on the number of lamps in the output circuit; a lamp output voltage being developed across the output circuit; further comprising a feedback circuit for controlling the oscillator whereby the oscillator sweeps from a first frequency above resonance to a lower frequency closer to resonance such that the output voltage increases to a potential above a lamp ignition threshold, thereby igniting at least one lamp; the feedback circuit controlling the oscillator whereb

Abstract: A ballast control integrated circuit for driving at least one gas discharge lamp comprising a first oscillator circuit for producing a first oscillating signal; a driver circuit for driving first and second output transistors connected in a half bridge configuration; the driver circuit being provided with pulsed signals derived from the first oscillating signal for generating pulsed drive signals for driving the first and second transistors; and a dimming control circuit responsive to a dimming input signal to drive the driver circuit such that the driver circuit provides the pulsed drive signals in bursts thereby to dim the lamp in dependence on the level of the dimming input signal. The ballast control integrated circuit also provides overcurrent and overvoltage sensing and allows master/slave operation.

Abstract: A ballast control circuit for multiple lamps comprising a ballast control circuit for driving two series connected switches of a lamp ballast connected across a supply potential and having a switched node between the switches; the switched node adapted to be connected to an output circuit comprising a plurality of parallel connected lamps; the control circuit comprising an oscillator, the output circuit comprising the plurality of parallel connected lamps including inductive and capacitive components and having a resonance frequency that is dependent on the number of lamps in the output circuit; a lamp output voltage being developed across the output circuit; further comprising a feedback circuit for controlling the oscillator whereby the oscillator sweeps from a first frequency above resonance to a lower frequency closer to resonance such that the output voltage increases to a potential above a lamp ignition threshold, thereby igniting at least one lamp; the feedback circuit controlling the oscillator whereb

Abstract: A ballast control integrated circuit for driving at least one gas discharge lamp comprising a first oscillator circuit for producing a first oscillating signal; a driver circuit for driving first and second output transistors connected in a half bridge configuration; the driver circuit being provided with pulsed signals derived from said first oscillating signal for generating pulsed drive signals for driving said first and second transistors; and a dimming control circuit responsive to a dimming input signal to drive said driver circuit such that said driver circuit provides said pulsed drive signals in bursts thereby to dim said lamp in dependence on the level of said dimming input signal. The ballast control integrated circuit also provides overcurrent and overvoltage sensing and allows master/slave operation.

Abstract: The present invention relates to an electronic ballast for driving a fluorescent lamp or the like, and more particularly to a new topology ballast that has only one switch in its oscillating part. The new ballast is an improvement over the conventional half-bridge structure, having a reduced number and size of key components, as compared to conventional designs.

Abstract: A resonant switching converter comprising a first pair of series connected switches comprising a high side switch and a low side switch coupled across a DC input voltage, there being a first switched node between the switches; a second pair of series connected switches comprising a high side switch and a low side switch coupled across a DC bus, there being a second switched node between the switches; a DC bus capacitor coupled across the DC bus; the first and second switched nodes adapted to have a load coupled therebetween; the high side switch of the first pair of switches supplying current to the load from the DC input voltage, the low side switch of the first pair of switches being switched opposite the high side switch of the first pair of switches and providing a re-circulation path to allow bi-directional current flow through the load; the high side switch of the second pair of switches supplying current to the load from the DC bus capacitor, the low side switch of the second pair of switches being swi