摘要:
The present invention discloses a method and device for two-stage solar concentration and a spectrum splitting dish reflector based on dish concentration. A parabolic dish reflector is provided with a central light hole. A CPV panel and a solar-to-heat receiver are positioned at the two sides of the axial line of dish reflector, respectively, under the light hole. A splitting lens is placed at a certain distance from the apex of dish reflector over the light hole. The splitting film is applied to the curved surface of the lens near the parabolic dish, as a spectrum splitting surface. The curved surface of the lens far from the parabolic dish is covered by silver, as a reflecting surface. A supporting structure is provided between the dish reflector and the splitting lens. The whole system with a dual-axis tracking system is placed on the foundation of a support. The present invention can simultaneously realize solar energy concentration and spectrum splitting, to obtain two concentrated spots of different spectrums under the system, which can effectively reduce energy consumption of tracking system and improve system balance and wind resistance. The present invention can adjust the concentration ratio of two beams individually to satisfy the optimal concentrating intensity needed by the CPV panel and the solar-to-heat receiver.
摘要:
A server rack includes a frame, a support, and a securing member. The frame includes a first pole and a second pole connected to the first pole. The support is connected to the first pole and the second pole. The securing member includes a first fastening section, a second fastening section connected to the first fastening section, and a third fastening section connected to the first fastening section and the second fastening section. The first fastening section is received in the first pole, the second fastening section is received in the second pole, and the third fastening section is received in the support. The first fastening section and the second fastening section are located on a first plane, and the third fastening section is located on a second plane substantially perpendicular to the first plane. The first fastening section, the second fastening section, and the third fastening section share a base wall.
摘要:
A scanning magnetic microscope includes a specimen stage for holding a specimen to be examined; a sensor for sensing a magnetic field generated by the specimen, the sensor including one of a magnetic tunneling junction (MTJ) sensor, a spin valve sensor, or an extraordinary Hall effect sensor; translation apparatus for translating the sensor relative to a surface of said specimen; and a data processor, having an input coupled to an output of said sensor, for constructing an image of said magnetic field. In another embodiment a read/write head from a hard disk drive is shown to make a suitable magnetic sensor. The scanning magnetic microscope can be used for examining the current flow in integrated circuits and related phenomenon, such as electromigration, as well as magnetic data storage media and biomagnetic systems, to mention a few suitable applications.
摘要:
A process for producing an alcohol from a gaseous hydrocarbon, e.g. a lower alkane such as methane, via oxidative reaction of the hydrocarbon in a concentrated sulfuric acid medium in the presence of a catalyst employs an added catalyst comprising a substance selected from iodine, iodine compounds, titanium, titanium compounds, chromiun and chromium compounds.