摘要:
An arrangement for connecting a cover panel for an electrical apparatus with a body structure, particularly of a vehicle, has locking bolts. On the interior side of its bottom, the cover panel is provided with locking rails into which, for the fastening of the panel, snap-in heads of bolts connected with the body structure can be inserted in a clamping manner. For removal, the panel is arranged so than it can be slid longitudinally on the snap-in heads that are held in the rails.
摘要:
A laser resonator (11) and a passive resonator (7,22) are coupled longitudinally in such a way as to prevent multiple reflections in the laser (11). The passive resonator (7,22) is, for example, monolithically integrated in laser (11). In a semiconductor wafer (5), a laser-active layer (1) and a waveguide layer (2) transparent to the laser beam are arranged at such a distance apart that no optical coupling occurs through the intermediate semiconductor material. The semiconductor wafer (5) has a cavity (7) perpendicular to the direction of layering and perpendicular to the propagation of the light, with a vertical flank (71) which forms a common reflecting surface of the laser (11) and the passive resonator (7,22) and an inclined flank (72) which reflects the light not coupled to the waveguide layer (22) forming part of the resonator out of the wafer (5).
摘要:
A laser diode array includes ridges formed in a cover layer forming an upper layer of a semiconductor body, the ridges being provided with separate contacts to produce laser active stripes in an active layer situated between a substrate and the cover layer. The thickness of the cover layer between the ridges is such that lateral coupling is achieved, while the thickness of the cover layer in the region adjoining the outside edges of the outer ridges is small enough so that lateral emission losses are low as the result of quasi-index guidance based on the metal clad ridge waveguide principle. A second embodiment provides wave guidance at the outside edges of the outer ridges by a buried heterostructure principle.
摘要:
The invention discloses a method for encrypting and/authenticating, comprising the following steps: Sending a request for a first bit combination or character combination as a first sub key (102); storing said first bit combination or character combination in the memory (104); generating a second bit combination or character combination as a second sub key (106), wherein the second bit combination or character combination is a random or pseudo random pattern; and combining said first sub key and second sub key to a key (108); further comprising at least one of the following steps: encrypting the data with the key (110); using the key as an authentication password (112); and a method of decrypting and/or authenticating, comprising the following steps: sending a request for a first bit combination or character combination as a first sub key (202); storing said first bit combination or character combination in the memory (204); repeating the following steps until a key has been verified as valid: generating one by one a second bit combination or character combination as a second sub key (206), wherein the second bit combination or character combination is one by one taken from the set of all possible second sub keys (208); combining said first sub key and second sub key to a key (210); verifying, whether the key is valid (212); if said key has been verified as valid, decrypting the data with the key (214) and/or using the key an authentication password (216).
摘要:
A process for the rectification of mixtures of high-boiling air- and/or temperature-sensitive substances which require a high separation efficiency is proposed, in particular a process for the working-up of a VE- or VEA-containing product stream. The process includes a first purification stage to separate low-boiling products and unspecified isomers of the useful product from the product stream virtually without loss of useful product and a second purification stage for removing the useful product in a stream having a purity of >97% by weight and a further stream having a purity of >92% by weight.
摘要:
This disclosure relates to a highly efficient gas turbine engine architecture utilizing multiple stages of intercooling and reheat, ceramic technology, turbocharger technology and high pressure combustion. The approach includes utilizing a conventional dry low NOx combustor for the main combustor and thermal reactors for the reheat apparatuses. In a first configuration, there are three separate turbo-compressor spools and a free power turbine spool. In a second configuration, there are three separate turbo-compressor spools but no free power spool. In a third configuration, all the compressors and turbines are on a single shaft. Each of these configurations can include two stages of intercooling, two stages of reheat and a recuperator to preheat the working fluid before it enters the main combustor.
摘要:
Shaped articles made of balsa veneers, balsa chips, balsa strands or balsa strips, which are oriented in the same direction according to their grain direction, and the grain direction of the individual chips deviates by 0° to 30° from the direction of the axis of the grain. The spaces of the adjacent balsa veneers, chips, strands or strips are filled with a, for example foamed, adhesive, the density of which may be the same as or close to the density of the surrounding balsa wood.
摘要:
Air guiding devices are provided in the front end of a vehicle in proximity to the front wheels. Each air guiding device has a laterally arranged air guiding duct with an air inlet opening for guiding radiator fresh air to a radiator and an outlet opening downstream behind the radiator unit for supplying the radiator outlet air to a wheel house. A closure element is arranged in the air outlet opening of the air guiding duct. The closure element is arranged transversely in the vehicle and has adjustable flaps. A separate flow duct is oriented in the longitudinal direction of the vehicle. The separate flow duct has an air entry opening arranged in the transverse plane of the closure element and an air exit opening directed toward a brake disk of a braking system in the front wheel of the vehicle.
摘要:
Planar structural element, as a portion of a foam block, the foam block being made of a foamed plastics material, containing a plurality of stacked foam bodies and/or foam bodies made of body segments, which are arranged next to one another in a plane and connected to one another to form foam bodies and which have flat weld seams at their abutting faces, and the foam bodies being welded to one another at their abutting faces with the formation of flat weld seams to form the foam block. The weld seams between the foam bodies are interrupted by recesses at a spacing from one another. The planar structural element is preferably used as the core or core layer in sandwich composites, for example in rotor vanes of wind power plants.
摘要:
A bearing assembly for radial and axial support of a shaft part relative to a housing includes two radial antifriction bearings located at an axial distance to one another on the shaft part and two axial antifriction bearings located at an axial distance to one another on the shaft part. To create better support, the bearing assembly has an outer bearing ring which is inserted into a hole of the housing and which, made as a one-piece component, has tracks for the two radial antifriction bearings and for the two axial antifriction bearings.