某型飞机电气设备故障诊断专家系统

运用Dephi7.O语言开发的某型飞机电气设备故障诊断专家系统,故障情况收集全面,诊断准确、有效和快速,软件设计可靠性高、扩展性强,专家知识库维护升级简便.     

南非国家激光中心在最新快速成型制造技术上取得突破

中国科技部网站2012年2月20日消息，南非科工研究理事会国家激光中心研究人员在激光添加制造技术（Additive Manufacturing）取得突破。该项技术的概念试验论证显示，其生产速度是现有的可商业化的选择性激光烧结技术的8．3倍。     

作战快速响应——军用太空未来纵观

在未来冲突中，太空军队可能面临各种挑战，从防御敌方系统攻击到应对迅速变化的技术和支援需求，可谓不胜枚举。美国空军把应对这些挑战的方案称为“太空作战快速响应”（ORS）计划。     

型材和管材的滚弯成型工艺

本文描述了型材的管材滚弯成型的原理，工艺方法和应用实例。     

快速凝固粉末冶金轻合金的研究发展概况

用快速凝固(或称快速固化)法粉末制成的合金具有耐磨性和耐热性优异、线膨胀系数低、纵向弹性模量高等优点。特别是Al、Ti、Mg等合金,具有下列优点:①凝固组织细微;②金属间化合物细微、均匀弥散;③合金元素的固溶范围显著增大[例如快速凝固铝粉中铁的固溶限度在平衡状态下为0.05%(重量);而在快速凝固粉末状态下可以固溶8%～10%(重量)];④合金添加元素的偏析少,因此材料性能大幅度提高。     

定向航空有机玻璃成型原理分析

本文通过对定向航空有机玻璃的各项特性阐述，并根据这些特点，详细论述了定向有机玻璃成型工艺原理并分析成型工艺的特点和注意事项，明确了工艺方法及影响产品质量的因素，为今后制造新产品奠定了基础。     

石英加速度计故障机理研究与仿真建模验证

针对加速度计故障定位测试方法不明确、周期长且定位不准确的问题,对加速度计故障机理进行研究以及验证.首先,通过对加速度计结构、工作机理、试验环境等方面的结合分析,从理论上研究了加速度计正负饱和、无输出等常见故障模式;其次,通过故障机理分析与20多种试验仿真模拟,建立每一种故障对应的故障模式;结果表明:加速度计每种故障与测...     

A strategic flight conflict avoidance approach based on a memetic algorithm

Conflict avoidance （CA） plays a crucial role in guaranteeing the airspace safety. The cur- rent approaches, mostly focusing on a short-term situation which eliminates conflicts via local adjust- ment, cannot provide a global solution. Recently, long-term conflict avoidance approaches, which are proposed to provide solutions via strategically planning traffic flow from a global view, have attracted more attentions. With consideration of the situation in China, there are thousands of flights per day and the air route network is large and complex, which makes the long-term problem to be a large-scale combinatorial optimization problem with complex constraints. To minimize the risk of premature convergence being faced by current approaches and obtain higher quality solutions, in this work, we present an effective strategic framework based on a memetic algorithm （MA）, which can markedly improve search capability via a combination of population-based global search and local improve- ments made by individuals. In addition, a specially designed local search operator and an adaptive local search frequency strategy are proposed to improve the solution quality. Furthermore, a fast genetic algorithm （GA） is presented as the global optimization method. Empirical studies using real traffic data of the Chinese air route network and daily flight plans show that our approach outper- formed the existing approaches including the GA .based approach and the cooperative coevolution based approach as well as some well-known memetic algorithm based approaches.