摘要:
Systems and methods in which worn railroad rails and wheels are repaired. For rail repair, a mobile additive manufacturing unit (i.e., 3D printer) operates along the rail and dispenses molten metal on the previously prepared portion of the rail. Reinforcing composite materials in powder form or pieces of composite materials may be added to the molten metal to enhance mechanical properties. For wheel repair, a fixed additive manufacturing unit is used in the same or similar manner as the mobile additive manufacturing unit for the rails albeit the wheel is rotated relative to the additive manufacturing unit. The repaired surface of the rails and wheels have dimension accuracies and surface finishes that are substantially the same as the original rails and wheels with the same or better mechanical strength and hardness as the original after resurfacing with grinding or milling tools.
摘要:
Described is an apparatus comprising: an input pad; an output pad; a wire, coupled to the input pad and the output pad, the wire positioned at a periphery of a semiconductor die, the wire extending substantially along a perimeter of the semiconductor die; and one or more diodes, coupled at various sections of the wire, and positioned along the perimeter of the semiconductor die and surrounding the semiconductor die.
摘要:
A laser anti-reflection device includes a polarizing beam splitter, a λ/4 wave plate and an absorber disposed in an outgoing light path of a laser emitting linearly polarized light with a wavelength of λ. The linearly polarized light from the laser passes through the polarizing beam splitter and the λ/4 wave plate in turn to become a circularly polarized light beam. Part of the circularly polarized light beam is then reflected by a workpiece to be processed along the original light path and passes the λ/4 wave plate to become a linearly polarized light beam with a polarization direction vertical to that of the outgoing linearly polarized light beam. The vertical polarized beam passes the polarizing beam splitter, deviates from the light path of the outgoing linearly polarized light beam and reaches the absorber. The laser anti-reflection device prevents reflected light from damaging the laser from high power lasers.
摘要:
A power supply system is provided, which includes a power supply subrack (PSS) and a power cable distributor (PCD). The PSS includes one or more power modules and a third connector (51), and the PCD is adapted to introduce one or more electrical signals from power input cables. The third connector (51) in the PSS is connected to the PCD and adapted to feed the introduced electrical signals to the power modules. Furthermore, a power cable distributor, a power supply subrack adapted to work with the PCD and an integrated equipment are provided.
摘要:
Compounds of formula I, XVI and XXI possess potent cell growth inhibitory activity. These compounds are described have therapeutic utility, particularly in the treatment of cancer as well as conditions and disorders related to uncontrolled cell growth: wherein the variables R1, R2, R3, R4, R5, X, Y and Z are described herein.
摘要:
Disclosed herein is a plasmonics platform comprising a substrate; a plurality of periodically spaced nanoholes and/or nanoparticles disposed upon the substrate; wherein the average first order of periodicity between the nanoholes and/or the nanoparticles is about 5 to about 1,000 nm; and a microelectromechanical and/or a nanoelectromechanical system in operative communication with the substrate so as to vary the average first order of periodicity between the nanoholes and/or the nanoparticles.
摘要:
An apparatus, method, and system for providing a mechanical divider adapted to shield at least a portion of an active surface of an integrated circuit from out-gassing from underfill material. The mechanical divider is attached to a mounting substrate. The underfill material is dispensed on the mounting substrate. The integrated circuit is placed on both the mechanical divider and on the underfill material after the mechanical divider has been at least partially cured. The mechanical divider may include a base surface adapted to contact the mounting substrate, a lower wall surface extending upwardly from the base surface, an upper wall surface adapted to abut a side wall of the integrated circuit, and a ledge surface extending between the lower wall surface and the upper wall surface, the ledge surface adapted to contact at least a portion of the active surface of the integrated circuit.
摘要:
Disclosed is a null mutant (or knockout) rodent comprising in its germ cells an artificially induced PTTG null mutation. In some embodiments, the null mutant rodent can be generated by way of homologous recombination in an embryonic stem cell or germ cell. The inventive null mutant rodent can be used to study mammalian physiology at the cellular, tissue, and/or organismal level with respect to various phenotypes, including hyperglycemia, hypoinsulinaemia, hypoleptinemia, diabetes, chromosomal aneuploidy, premature centromere division, chromosomal damage, aberrant mitotic cellular division, thrombocytopenia, thymic hyperplasia, splenic hypoplasia, testicular hypoplasia, and female subfertility. Also disclosed is an animal model for diabetes. Also disclosed is a somatic or germ cell obtained from the null mutant rodent. Also disclosed is a cell line derived from a cell obtained from the null mutant rodent.