摘要：In order to obtain optimized flight vehicle concepts which meet system of systems （SOS） operation requirements, designers have to pay high attention to the impact of SoS at conceptual design stage since operation environment goes increasingly complex. Based on this tendency, per- spectives and progre,;ses of SoS oriented flight vehicle conceptual design, which is abbreviate as SoSed design, are reviewed in this paper. Such basic concepts of SoS as definition, characteristics, differences between systems engineering and SoS engineering, as well as SoSed design process are introduced, then SoS engineering process model for research and development of flight vehicles and SoSed design wheel model for conceptual design are proposed. Related literature is classified and analyzed in accordance with four major elements including requirements, design concept, design analysis, and trade studies and optimization： typical SoS architectures, description and quan- tization of indexes are introduced; Application of inverse design in designing concept is analyzed; Modeling and simulation （M＆S）-based methods and their applications in SoSed effectiveness evaluation are highlighted; According to SoSed trade studies and optimization related research, the importance of such points as decision-making and using multidisciplinary design optimization for reference are emphasized. Finally, the value of SoSed design is concluded, and five directions which are worthy of .attention in this field are presented.

摘要：为了实现公路隧道建设过程中掌子面前方围岩质量的准确、快速评价,在传统岩体分级BQ方法基础上,基于机器学习与可靠度算法提出了一种隧道施工过程中围岩动态分级方法。机器学习工具选取为最小二乘支持向量机(LSSVM),并通过细菌觅食算法(BFOA)对其参数进行优化选取,以此构建分级指标组与围岩级别之间的非线性映射关系,其中分级指标组是由地质超前预报结果、掌子面强度回弹值等易于在施工过程中获取的参数形成。而且对于某些分级指标获取过程中可能存在的随机性问题,引入可靠度理论加以修正,通过机器学习结果构建可靠度计算的功能函数,最终得出具有概率意义的围岩分级结果。将所述方法应用于甄峰岭隧道现场,根据计算结果对部分区段进行了设计变更,通过自动化监测数据证明了变更方案的适用性。结果表明,所述分级方法可有效实现施工过程中围岩动态分级计算,为隧道建设的动态设计过程提供了一种新思路。

摘要：对新型交流稳压原理进行了探索,将零电流转换脉宽调制(ZCT-PWM)软开关技术应用到交流稳压系统设计中,以 DSP 为核心,实现 PWM 脉冲触发信号产生和交流稳压变换器控制。