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本文给出了一种多微处理器体系结构,重点讨论了多微处理器间信息交换和仲裁逻辑的实现机制及具体设计步骤,并给出了具体实现的硬件逻辑电路及交换的时序图。实际运行表明:该仲裁逻辑电路具有仲裁开销小、扩缩性好、可靠性高等特点;它完全能满足高性能的测控系统和各种高精度的智能仪器仪表的特殊要求。 相似文献
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JIAN-KANG WU DOU-SHEN CHENG WEN-TAO WANG DENG-LIN CAl 《International journal of remote sensing》2013,34(8):1347-1356
Abstract We present a model-based remotely-sensed image interpretation expert system embeded in a knowledge-based geographic information system (K. BIS). The KBIS consists of four sub-systems: a pictorial data base system, an image interpretation expert system, a computer-aided planning system and a computer-aided cartographic system. The image interpretation expert system represents ecological knowledge and other expert knowledge by frames. Its reasoning process consists of a forward reasoning based on the Bayes classification of Landsat imagery, a backward reasoning using frame knowledge and reasoning using a spatial consistency model. A forest inventory study was conducted in Shaxian county, in the southern part of China, using this expert system. The results have shown a significant improvement. Building image interpretation expert systems within knowledge-based pictorial systems is very convenient and efficient because there are well-organized data, knowledge and procedures available. 相似文献
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介绍了中间体2-氯-4-三氟甲基苯酚的合成工艺,优化出了最佳工艺条件,中间体含量为99%,收率为91%。 相似文献
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CAl Yingwen MAO Xiemin LI Jianguo FU HengzhiNorthwestern Polytechnieal University Xi'an China Manuscript received March 《金属学报(英文版)》1994,7(2):84-88
Theoretical model for non-equilibrium solidification is constructed with consideration of diffuse interface and muliphase fhctuation.It can be degenerated to A(?)i(?) continuousgrowth model in the case of mono-atomic approximation.For large underecooling, thechange of heat eapacity should not be neglected and it usually gives an increase in the inter-face partition coefficient.Solute trapping may happen at a rather slow growth rate com-pared with that predicted by other models,because the undercooling and structural relaxa-tion ahead of the S/L interface lowers the interfacial diffusivity to a great extent. Phasefluctuation has two contending effects,decrease in energy barrier and increase in atomicdragging,therefore exerts dual influences on the partition coefficient. 相似文献
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爆炸焊接界面虽然同时具有熔化、扩散和压力焊的特征 ,但熔化所产生的缝隙和”空洞物”大大削弱了界面的结合强度 ,在爆炸焊接过程中 ,要尽量消除熔化的影响 ,因此本文否定了爆炸焊接传统的熔焊机理 ;而扩散焊是压力焊的一种形式 ,同时扩散也只是界面由于高压产生结合的结果 ,而不是界面结合的原因 ,所以也不宜用扩散焊接解释爆炸焊接界面的成因。试验和理论研究表明 ,爆炸焊接是一种特殊的压力焊。为了获得没有熔化的微小波状的良好界面 ,爆炸焊接装药参数应取焊接窗口的下限。 相似文献