摘要:
A system including a solar heat collector and a heat receiving structure has a supply conduit extending through an airspace within the solar heat collector, to the heat receiving structure, and into the heat receiving structure. A temperature sensor within the airspace of the solar heat collector measures a temperature within the airspace of the solar heat collector and turns an air pump on to move air through the supply conduit it this temperature is too high. This air may be exhausted through a bypass valve instead of being pumped into the heat receiving structure. The heat receiving structure may include a pool with water heated by bubbles of hot air from the supply conduit.
摘要:
A thermal insulation system includes an evacuated structure including an internal space in which a vacuum is sustained by a vacuum pump operating when it is determined that a pressure within the internal space has risen to a predetermined level. In one embodiment, such a system is used within a dome structure extending over and around a heat receiving structure within a solar heating system.
摘要:
A solar heat collecting dome includes a frame having an odd number of frame elements extending upward and inward from a floor structure to a disk at the top of the dome. A dome shaped helical structure including two flexible tubes is woven to extend along and around the frame elements, with the dome shaped helical structure extending across alternating inner and outer sides of the frame elements, and with adjacent portions of the dome shaped helical structure extending across alternating inner and outer sides of each frame element. At an outer end of the dome shaped helical structure, the two tubes form an inlet and an outlet. At the inner end, the two tubes are joined. The frame may also include a fluid path, with the fluid moving in opposite directions in each of the frame elements.
摘要:
1. An electronic proximity fuze for a projectile comprising transducer me for converting infrared radiation to an electrical signal, amplifying means connected to said transducer for amplifying said signal, said amplifying means including automatic gain control means for decreasing the gain of said amplifying means upon occurrence of a slowly rising signal, electronic switch means, a source of electrical energy, a detonator, means connecting said switch means said source and said detonator in electrical series circuit, means connecting said amplifying means and said electronic switch means for closing said switch means upon occurrence of a rapidly rising signal of predetermined magnitude, said last named means operating to reduce said predetermined magnitude of the signal when said automatic gain control has decreased the gain of said amplifying means.
摘要:
A traffic management system and method are provided that determine and present a target speed for a vehicle to travel from a first position to a second position when a signaling device at the second position is in a desired phase. The target average speed can be presented via a variety of output devices, such as a display and/or speaker. The output device could, for example, be stationary, at a fixed distance from the signaling device, such as a roadside display. The output device could be a mobile device, carried in a vehicle or by a user, e.g., a cell phone, GPS navigation system, or personal digital assistant. The system can include a signal timing processor that determines a target average speed of travel between the first and second positions, which can be based on, or calculated from, timing information of the signals and a distance between the two positions.
摘要:
A releasably detachable forklift assembly is coupled to a snowplow mount on a light truck to utilize the mechanical actuating features of the snowplow assembly to actuate the forklift assembly for lifting the forklift and angling it. The use of the light truck provides for forklift transport, adequate clearance for uneven terrain, and with the height of the seat of the light truck affording excellent visibility above the load carried by the tines of the forklift assembly.
摘要:
A computerized test preparation system and methods are disclosed which assist an examinee to increase his learning and improve his performance on standardized academic or applied aptitude and achievement exams. Performance feedback information is provided to a user, including conventional information such as number of items correct and time elapsed, pinpoints substantive areas of a particular exam in which the user is either weak or strong, and offers diagnoses of, and remediation tailored to, a user's personal difficulties. By assessing a user's responses to given exam questions, through various distractor error patterns manifested in the incorrect answers to multiple-choice questions, or through coded categories of responses in the case of user responses to constrained open-ended items, a preliminary diagnosis of a user's deficits in knowledge and/or test taking skill is made. This preliminary diagnosis is subsequently refined utilizing additional examination questions. The refined diagnosis is then utilized to offer recommendations to an individual user to ameliorate the user's manifested error patterns. A user's response to this remediation is confirmed and reinforced using subsequent remediation activities.
摘要:
A hybrid solar heat collector within a translucent dome structure includes a tubular frame, forming a first fluid path, and a transverse hose winding in a spiral inside and outside alternating legs of the frame to form a second fluid path. The first fluid path is connected to a reservoir in which a heater that is turned on to heat a fluid in the first fluid path when its temperature falls below a threshold. The reservoir is located within the dome structure and is configured to readily heat the space within the dome structure, so that the freezing of fluids within the heat collector is prevented. The translucent dome structure is provided with a layer having an opacity that is increased in response to an increase in temperature above a different threshold level, so that the boiling of fluids within the heat collector is prevented.
摘要:
A thermal insulation system includes an evacuated structure having an internal space filled with an aerogel layer, in which a vacuum is sustained by a vacuum pump operating when it is determined that a pressure within the internal space has risen to a predetermined level. For example, such a system is used within a dome structure extending over and around a heat receiving structure within a solar heating system or within a system providing thermal insulation for a building structure, a refrigerator, or a railroad car.