摘要:
A system of protection for an AC/DC hybrid electric power generation and distribution system having an AC portion comprising at least one source of AC power producing AC current coupled by first power feeders to a DC portion comprising at least one AC to DC converter producing DC current, the DC current being coupled by second power feeders to utilization equipment, comprises AC current sensors producing current sense signals proportional in magnitude to the AC current and DC current sensors producing current sense signals proportional in magnitude to the DC current. The AC current sensors define an entrance to a zone of protection, and the DC current sensors define an exit from the zone of protection. The AC and DC current sense signals are relationally compared to detect the presence of a differential current fault within the zone of protection. The protection system further discriminates the location of the fault between the AC portion and the DC portion of the hybrid power system by monitoring the ripple content in the sensed AC current. The relationship function utilized varies with the type of AC to DC conversion equipment to compensate for the power loss and transformer step up or down ratio (if used) to ensure tracking of the current level between AC current and DC output current. In addition to differential current fault protection, the instant invention detects shorted and open rectifiers, phases, and sensors.
摘要:
The present invention relates to compositions comprising an RXR agonist, an RAR agonist, or a dual RXR/RAR agonist. The present invention further relates to methods of using the agonist compositions for treating or preventing dementia and cancer. In some embodiments, the dementia comprises Alzheimer's disease. In some embodiments, the cancer comprises leukemia.
摘要:
A material comprises a cover layer and a porous material layer. The cover layer may include a rigid, semi-rigid or flexible material and the porous spacer material layer may include a reticulated foam, nonwoven textile, or a spacer fabric. The material is configured to have a high air flow rate upon an application of a pressure, and good compactability.
摘要:
Naphthyl-containing compounds having structural formula S2R for use in organic light-emitting diodes (OLEDs). R may include an aromatic group, a heterocyclic group, or a group that is both aromatic and heterocylic. In some examples, R is phenyl, biphenyl, and thiophenyl. OLEDs including these compounds are shown to emit in a range between 400 nm and 700 nm. These OLEDs are suitable for devices including televisions, laptop computers, computer monitors, personal digital assistants, mobile phones, portable media players, watches, test devices, advertising displays, information displays, indication displays, and large-area light-emitting elements for general illumination.
摘要:
A laminated material including a decorative or functional cover layer laminated to a porous material layer. The cover layer may include a rigid, semi-rigid or flexible material and the porous spacer material layer may include a reticulated foam, nonwoven textile, or a spacer fabric. The cover layer is laminated onto the porous material layer, increasing the seam strength, durability and dimensional stability of the material.
摘要:
The invention relates to a guide rod for tube shank instruments to be introduced into a body cavity which is characterised by at least two telescopic rod parts, whose ends which neighbor given the largest possible rod length, are releasably lockable with a positive or non-positive fit and whose extension movement is limited by an abutment.
摘要:
The present disclosure relates to pharmaceutical compositions comprising caffeic acid chelates, kits, and methods for using such compounds and pharmaceutical compositions.
摘要:
Naphthyl-containing compounds having structural formula S2R for use in organic light-emitting diodes (OLEDs). R may include an aromatic group, a heterocyclic group, or a group that is both aromatic and heterocylic. In some examples, R is phenyl, biphenyl, and thiophenyl. OLEDs including these compounds are shown to emit in a range between 400 nm and 700 nm. These OLEDs are suitable for devices including televisions, laptop computers, computer monitors, personal digital assistants, mobile phones, portable media players, watches, test devices, advertising displays, information displays, indication displays, and large-area light-emitting elements for general illumination.
摘要:
A material comprises a cover layer and a porous material layer. The cover layer may include a rigid, semi-rigid or flexible material and the porous spacer material layer may include a reticulated foam, nonwoven textile, or a spacer fabric. The material is configured to have a high air flow rate upon an application of a pressure, and good compactability.
摘要:
A laminated material including a decorative or functional cover layer laminated to a porous material layer. The cover layer may include a rigid, semi-rigid or flexible material and the porous spacer material layer may include a reticulated foam, nonwoven textile, or a spacer fabric. The cover layer is laminated onto the porous material layer, increasing the seam strength, durability and dimensional stability of the material.