摘要:
A method for fabricating articles of high-temperature aluminum alloys having a compressional strength of at least 20 kg/mm.sup.2 at temperatures of 300.degree. C. or greater, is disclosed. The method comprises the steps of: (a) forming a porous preform from particles of a first aluminum alloy via cold-pressing, the preform having the shape and dimension of the aluminum alloy article to be fabricated; (b) squeeze-casting a molten second aluminum alloy into void spaces of the porous preform to form an aluminum composite containing the first aluminum alloy, which serves as a reinforcement phase, dispersed in the second aluminum alloy, which serves as a matrix phase; (c) wherein the molten second aluminum alloy is cast at such temperatures so as to cause a surface of the first aluminum alloy particles to melt and thereby form a strong bonding with the second aluminum alloy. The first aluminum alloy particles are formed by melt-spinning, followed by rapid solidification and precipitation, of a composition of the first aluminum alloy to form a thin ribbon, then pulverizing the thin ribbon into particles. Unlike the prior art processes, which fabricate high-temperature aluminum alloys only in essentially two-dimensional articles, the method disclosed herein allows the capability of near net shaping, i.e., it can fabricate high-temperature aluminum alloy articles of essentially any intended shapes. The present process allows selective reinforcement of the fabricated articles to be achieved at strategically important locations, so as to expand the range of engineering applications of the fabricated articles without incurring substantially increased manufacturing cost.
摘要翻译:公开了一种在300℃或更高的温度下制造具有至少20kg / mm 2的压缩强度的高温铝合金制品的方法。 该方法包括以下步骤:(a)通过冷压从第一铝合金的颗粒形成多孔预成型件,预制件具有要制造的铝合金制品的形状和尺寸; (b)将熔融的第二铝合金挤压成多孔预型体的空隙空间,形成含有分散在作为基体相的第二铝合金中作为增强相的第一铝合金的铝复合材料; (c)其中熔融的第二铝合金在这样的温度下铸造,使得第一铝合金颗粒的表面熔化,从而与第二铝合金形成牢固的结合。 首先通过熔融纺丝形成第一铝合金颗粒,随后快速凝固和沉淀出第一铝合金的组成,形成薄带,然后将薄带粉碎成颗粒。 与仅在基本上二维制品中制造高温铝合金的现有技术方法不同,本文公开的方法允许近净成形的能力,即它可以制造基本上任何预期形状的高温铝合金制品。 本方法允许选择性地加强要在战略重要位置实现的制造制品,从而扩大制造制品的工程应用范围,而不会导致显着增加的制造成本。
摘要:
A method of forming a copper circuit pattern on a ceramic substrate. In accordance with the method, first and second layers of copper oxide and copper are applied to the ceramic substrate. Selected regions of the copper are then masked so that unmasked regions are formed on the copper in a configuration of the copper circuit pattern. Masked regions are formed on the copper adjacent the unmasked regions, where copper cannot be plated. The unmasked regions of the copper are plated in a neutral pH solution by a reverse pulse plating process. The masking is then removed and the copper and copper oxide layers are etched so that the copper and copper oxide is removed from the unmasked regions. Thereafter, the remaining copper is direct bonded to the substrate.
摘要:
Techniques are described for obtaining high-resolution physical locations for a wireless device by leveraging the high-resolution physical location capabilities of wireless peers of the wireless device to provide a peer-to-peer location service and facilitate location targeting. Wireless devices provide location updates to a computing cloud, which stores records associating wireless device identifiers with received location information for the corresponding wireless devices. A wireless device issues a peer discovery request to dynamically identify nearby wireless peers in its network. The wireless device then sends wireless device identifiers for the nearby wireless peers in a location request to the computing cloud, which estimates a location for the wireless device using the previously recorded location information for the nearby wireless peers. The computing cloud returns the estimated location to the requesting wireless device.
摘要:
Techniques are described for obtaining high-resolution physical locations for a wireless device by leveraging the high-resolution physical location capabilities of wireless peers of the wireless device to provide a peer-to-peer location service and facilitate location targeting. Wireless devices provide location updates to a computing cloud, which stores records associating wireless device identifiers with received location information for the corresponding wireless devices. A wireless device issues a peer discovery request to dynamically identify nearby wireless peers in its network. The wireless device then sends wireless device identifiers for the nearby wireless peers in a location request to the computing cloud, which estimates a location for the wireless device using the previously recorded location information for the nearby wireless peers. The computing cloud returns the estimated location to the requesting wireless device.
摘要:
Video processing circuitry to adaptively process input video data which corresponds to a plurality of video frames of a selected channel which is one of a plurality of channels of a broadcast spectrum. In one aspect, the video processing circuitry includes spatial adaption circuitry to generate and output spatially adapted video data corresponding to the plurality of video frames, temporal adaption circuitry to generate and output temporally adapted video data corresponding to the plurality of video frames, and video manipulation circuitry, coupled to the spatial adaption circuitry and the temporal adaption circuitry, to generate output video data corresponding to the plurality of video frames, using the input video data, the spatially adapted video data and the temporally adapted video data. Methods of adaptively processing input video data which corresponds to a plurality of video frames of a selected channel which is one of a plurality of channels of a broadcast spectrum are also disclosed.
摘要:
A method is provided for evaluating identity of an object, the method including: converting feature information representing the object to a plurality of mathematically defined components; grouping the components into multiple modalities; producing respective first prediction information for each respective modality wherein the respective prediction information for each respective modality is based upon respective components grouped into that respective modality; and producing second prediction information based upon the respective first prediction information produced for the multiple respective modalities.
摘要:
A pseudo-NMOS circuit includes a load PFET electrically connected between a power supply and an output node, and an NFET circuit having a plurality of inputs connected between the output node and ground. A feedback PFET is electrically connected between the power supply and the output node, in parallel with the load PFET, and is controlled by a signal at the output node of the pseudo-NMOS circuit.
摘要:
The present invention is directed to a method for forming a heat treating atmosphere in which a nitrogen rich gas containing small amounts of oxygen is preheated. An oxygen-reactive gas, such as a hydrocarbon gas, is combined with the nitrogen rich gas and the mixture is reacted outside of the furnace at temperatures above which substantial sooting does not occur. The resulting heat treating atmosphere is then forwarded to the furnace for conducting the heat treating process.
摘要:
A multiplexer (MUX) circuit with balanced select line loading is provided. The MUX circuit includes a plurality of 2:1 MUX units coupled together in a multistage cascading arrangement, along with a selection module coupled to the MUX units. The MUX units are arranged in an initial MUX stage, at least one intermediate MUX stage coupled to and following the initial MUX stage, and a final MUX stage coupled to and following the at least one intermediate MUX stage. Each MUX unit is controlled with a respective select bit input value provided by the selection module. The selection module controls the operation of the MUX units in the initial MUX stage with a first plurality of different select bits, controls the operation of the MUX units in the at least one intermediate MUX stage with a second plurality of different select bits, and controls the operation of the final MUX stage with a devoted select bit.
摘要:
Techniques are described for obtaining high-resolution physical locations for a wireless device by leveraging the high-resolution physical location capabilities of wireless peers of the wireless device to provide a peer-to-peer location service and facilitate location targeting. Wireless devices provide location updates to a computing cloud, which stores records associating wireless device identifiers with received location information for the corresponding wireless devices. A wireless device issues a peer discovery request to dynamically identify nearby wireless peers in its network. The wireless device then sends wireless device identifiers for the nearby wireless peers in a location request to the computing cloud, which estimates a location for the wireless device using the previously recorded location information for the nearby wireless peers. The computing cloud returns the estimated location to the requesting wireless device.