摘要:
The present invention provides ruthenium or osmium complexes and their uses as a catalyst for catalytic water oxidation. Another aspect of the invention provides an electrode and photo-electrochemical cells for electrolysis of water molecules.
摘要:
The present invention provides ruthenium or osmium complexes and their uses as a catalyst for catalytic water oxidation. Another aspect of the invention provides an electrode and photo-electrochemical cells for electrolysis of water molecules.
摘要:
An instrument for determining the second and/or third-order components of the gravity tensor includes a group of six accelerometers arranged at an equal radius from a spin axis and positioned at 60 degree intervals about the spin axis with the sensing axis of each accelerometer aligned tangentially to the circle subscribed by the accelerometers as they rotate about the spin axis. A gyro-stabilized platform maintains the accelerometer arrangement at a preferred alignment relative to the local gravity vector. As the accelerometers orbit about the spin axis, each accelerometer outputs a sinusoidal signal that is offset by 60 degrees from its immediately adjacent leading and trailing accelerometers with the outputs thereof processed to provide the second-order component and the third-order tensor component. In another arrangement, a group of eight accelerometers arranged at an equal radius from a spin axis and positioned at 45 degree intervals about the spin axis can provide second, third, and fourth-order tensor components. The higher-order tensor components are of use in “de-cluttering” the lower-order tensor components.
摘要:
A database schema is disclosed that can significantly reduce the quantity of data required to describe the geometry of a train track and the geo-locations of features (e.g., grade crossings, mileposts, signals, platforms, switches, spurs, etc.) along the track. In accordance with the illustrative embodiment, a railroad track is represented as a plurality of partitions, each of which has its geometry contained within unique track point elements. Multiple track partitions are then joined together by common track point elements at their boundaries to create continuous rail networks. A compact table schema is employed that enables continuous sections of three-dimensional track splines to be rendered accurately in the track database, irrespective of the location of vertical and horizontal curvature along track segments. The data representation scheme also enables efficient storage of the geo-locations of features along a track, as well as the direct reconstitution of accurate three-dimensional track splines.
摘要:
The present invention provides a new set of algorithmic solutions to accommodate track inaccuracy information in track databases. Navigation and measurement aiding processes are defined by a stochastic mode relative to a moving rail frame defined so that it is aligned with the heading of the compensated track database at the current along track-position. Filtering generates long and short wavelength track alignment disturbances commensurate with track grade to compensate for track database errors; a stochastic error model is defined as the difference between the deterministic implementation and the actual stochastic processes Bayesian estimation of the error variables is implemented via a digital Kalman filter with the navigation, database, and measurement errors removed by subtracting the filter estimates.
摘要:
A system for measuring differential gravity at two points is disclosed. In the illustrative embodiment, the system uses a pair of graspers which each repeatedly grasp, raise, and drop a test mass. The accelerations of the two free-falling test masses are monitored using optical interferometry. An output signal is provided that is based on a differential acceleration of the two test masses.
摘要:
A system and method of providing a micromirror pixel 400 that is highly resistant to bright failure states. The micromirror 400 uses an asymmetric yoke 402 to ensure the mirror is only attracted to the address electrode in one rotation direction. The landing mechanism on the other side of the torsion binge axis also is altered to allow the pixel to over rotate in the “off” direction. The over rotation ensures that light reflected by the mirror when in the off direction will miss the projection lens pupil, allowing the corresponding pixel to remain dark in both an operational and failed state.
摘要:
A lighting strip for use in direction and guidance systems includes an elongated insulating base upon which one or more light emitting diode strips each supporting a plurality of light emitting diodes are positioned. A terminal housing supporting operative power systems and control apparatus is coupled to one end of the lighting strip while the remaining end may be coupled to an end cap or connected to a further lighting strip to increase the array size. The light emitting diodes are encapsulated within a light transmissive material top cover to provide physical protection and seal for the light emitting diodes.
摘要:
An electrode sensor which may be used to specifically and quantitatively measure nitric oxide is provided, as well as a method of preparing and using such an electrode sensor to measure nitric oxide concentration in solution. A nitric oxide (NO) microsensor based on catalytic oxidation of NO comprises a thermally-sharpened carbon fiber with a tip diameter of about 0.5-0.7 .mu.m coated with several layers of p-type semiconducting polymeric porphyrin and cationic exchanger deposited thereon. The microsensor, which can be operated in either the amperometric, voltammetric or coulometric mode utilizing a two or three electrode system, is characterized by a linear response up to about 300 .mu.M, a response time better than 10 msec and a detection limit of about 10 nM. The sensor of the present invention also discriminates against nitrite, the most problematic interferant in NO measurements. The amount of NO released from a single cell can thus be selectively measured in situ by a porphyrinic microsensor of the invention. A larger scale sensor utilizing porphyrin and cationic exchanger deposited on larger fibers or wires, platinum mesh or tin indium oxide layered on glass, can also be employed when measurement of NO concentration in chemical media, tissue or cell culture is desired.
摘要:
Disclosed is a noise insulation device for aircraft, comprising a first opening that is delimited by a series of conducting surfaces whose inner edge is oriented towards the interior of the noise insulation device from a horizontal cross-sectional perspective and whose outer surface is directed towards the side, a roof, and a second opening which is located opposite the first opening and is delimited by walls. The inventive noise insulation device is characterized in that the size of the second opening can be modified by making changes to the walls.