摘要:
Lattices of alternating layers of monocrystalline silicon and porous silicon-germanium have been produced. These single crystal lattices have been fabricated by epitaxial growth of Si and Si--Ge layers followed by patterning into mesa structures. The mesa structures are stain etched resulting in porosification of the Si--Ge layers with a minor amount of porosification of the monocrystalline Si layers. Thicker Si--Ge layers produced in a similar manner emitted visible light at room temperature.
摘要:
An improved apparatus and method is used to cast a plurality of articles in a mold structure having a plurality of article molds disposed in an array having an open central portion. The article molds are filled with molten metal while the mold structure is supported on a chill plate. An inner baffle plate is disposed in the central portion of the array of article molds and retards the transfer of heat from the article molds to the chill plate. The inner baffle plate is supported by a support structure which extends through the chill plate. After the article molds have been filled with molten metal, the chill plate and mold structure are lowered relative to the inner baffle plate to increase the rate of heat transfer from the article molds to the chill plate through the open central portion of the array of article molds. Thereafter, the inner baffle plate and support structure are lowered with the chill plate and mold structure. An outer baffle plate extends around the outside of the mold structure and is supported by the support structure. The outer baffle plate may be pressed against the bottom of a furnace to retard heat transfer between the inside and outside of the furnace along a path extending outside of the mold structure.
摘要:
An inorganic composition prepared from colloidal silica, monoaluminum phosphate and aluminum chlorohydrate is employed as a bonding agent to bond refractory materials to a porous base fabric, such as fiberglass, to prepare fabric compositions that are flame and heat resistant and possess dielectric properties.
摘要:
The invention comprises a method for managing cropland, comprising the steps of: (1) measuring, each of a set of spatially resolved locations, level zero data with an orbiting satellite, the level zero data comprising, spectral responses in ranges of 400 to 1,100; 700 to 2,500; and 2,500 to 12,000 nm; (2) processing, on-board the orbiting satellite, the level zero data comprising a first data storage size, to yield crop condition information comprising a second data storage size of less than one percent of the first data storage size; (3) measuring, on-board the orbiting satellite, crop transpiration with the near-infrared radiation to determine drought locations of the set of spatially resolved locations; (4) receiving from the orbiting satellite to a ground based communication system the crop condition information including the drought locations; and (5) relaying at least a portion of the crop condition information to a farmer within twenty-four hours.
摘要:
The invention comprises a method and apparatus for managing cropland, comprising the steps of: (1) optically measuring, each of a set of spatially resolved locations, level zero data with an orbiting satellite, the level zero data comprising: first reflected cropland radiation, in a first range of 400 to 1,100 nm; second reflected cropland radiation in a second range of 1,100 to 2,500 nm; and emitted radiation, in a third range of 2,500 to 12,000 nm; (2) processing, on-board the orbiting satellite, the level zero data comprising a first data storage size, to yield crop condition information comprising a second data storage size of less than one percent of the first data storage size; (3) receiving from the orbiting satellite to a ground-based communication system the crop condition information; and (4) relaying at least a portion of the crop condition information and an actionable prescription to a farmer within twenty-four hours.
摘要:
A weed spraying system for precisely spraying a liquid herbicide includes a sprayer that has a wand and a spray nozzle. The spray nozzle selectively sprays a liquid onto a plant. A shield is removably coupled to the wand. The shield is aligned with the nozzle to inhibit the liquid from spraying past the shield. In this way the liquid may be applied on a selected spot.
摘要:
The invention comprises a method and apparatus for managing cropland comprising the steps of: (1) wirelessly linking a remote sensing platform to a ground based communication system; (2) spatially resolving into a set of locations a ground matrix area using optics of the remote sensing platform; (3) optically measuring for each member of the set of locations: first reflected cropland radiation in a visible range using the remote sensing platform, second reflected cropland radiation in a near-infrared range, and emitted radiation in an infrared range of 2500 to 12,000 nm; (4) generating a crop health data set for each set of locations using the combined remote sensing data; (5) repeating the steps of spatially resolving and optically measuring to periodically update the crop health data set; and (6) communicating the specific crop management recommendations to a farm treatment system.
摘要:
A noninvasive analyzer apparatus and method of use thereof is described using a plurality of time resolved sample illumination zones coupled to at least one two-dimensional detector array monitoring a plurality of detection zones. Control of illumination times and/or patterns along with selected detection zones yields pathlength resolved groups of spectra. Sectioned pixels and/or zones of the detector are optionally filtered for different light throughput as a function of wavelength. The pathlength resolved groups of spectra are subsequently analyzed to determine an analyte property. Optionally, in the mapping and/or collection phase, incident light is controllably varied in time in terms of any of: sample probe position, incident light solid angle, incident light angle, depth of focus, energy, intensity, and/or detection angle. Optionally, one or more physiological property and/or model property related to a physiological property is used in the analyte property determination.
摘要:
A method for suggesting ventilator protocols includes accessing data from a plurality of ventilators in operation, analyzing an aggregate of the data, and suggesting a protocol for a ventilator of the plurality of ventilators based on the analyzed aggregated data.
摘要:
In an embodiment, a communications device exchanges, between first and second access terminals, higher priority data in association with a communication session of a first type and also lower priority data in association with a communication session of a second type. If the communications device determines a transition of the first access terminal to a lower data-rate environment, the communication device reduces a size of data packets exchanged between the first access terminal and an application server for the communication session of the second type. If the communications device determines an upcoming data packet is a low-data packet (e.g., a silence packet), the low-data packet is suppressed. If the communications device determines that the first access terminal has attempted transmission of a set of last or near-last data packets in the sequence, the communications device re-transmits the set of last or near-last data packets without waiting for ACKs.