利用Delphi设计开发卫星测控设备远程实时监控子系统

介绍了卫星某频段控制设备远程实时监控系统的总体设计思想,以及利用Ｄｅｌｐｈｉ３ ．０ 开发的具体实现方法,其中涉及了许多Ｄｅｌｐｈｉ 的最新技术。     

考虑机场位置与航线流量影响的航空网络防御资源优化策略

传统复杂网络领域对网络防御问题的研究未考虑影响航空网络防御资源配置的主要因素,为此提出 一种考虑机场位置、航线流量等因素的基于航空网络实际的防御策略,来降低网络风险。首先,利用节点脆弱 性减少模型确定不同类型防御资源防御量与节点防御能力的函数关系;然后,对传统的重要度评价矩阵做出改 进,考虑航线流量、机场位置等影响航空网络防御资源配置的因素对节点进行重要度排序,并分析节点与整个 航空网络风险的关系;最后,在总防御资源量一定的情况下,利用模拟退火算法对各个节点配置的防御资源量 进行求解,使得网络总风险最小。通过对随机生成网络与中国航空网络的实验发现,该优化策略在分配防御资 源时,能够区分机场节点位置和流量的差异,相比于传统方法能够有效降低网络总风险。     

复杂外形气动力计算的阻力修正方法

基于气动力计算的位流线化理论,发展了一种亚音速附面层阻力修正方法。采用联合流场求解方法获得复杂外形的表面压力分布,在此基础上,将绕复杂外形物体沿流向面元划分为片条,在片条上,把三维附面层转换为二维附面层,对二维附面层进行数值求解,得到附面层粘性阻力修正。算例表明,该方法计算量小,与实验和N-S数值解结果吻合较好。为复杂气动外形飞行器初期设计、方案选型及评估提供了较为理想的工程设计手段。     

Cooperative formation control of multiple aerial vehicles based on guidance route in a complex task environment

In recent years, formation control of multi-agent has been a significant research subject in the field of cooperative control. However, previous works have mainly concentrated on formation control for simple point-mass model and linear model. In contrast, this paper presents a novel cooperative algorithm for multiple air vehicles formation control, which aims to devise a control strategy based on guidance route to achieve precisely coordinated formation control for a group of fixed-wing aircraft in a complex task environment. The proposed method introduces the leader-follower structure for effective organization of the multi-agent coordination. Moreover, the Partial Integrated Formation and Control (PIFC) is adopted to design the control law for Guidance-Route based Formation Control (GRFC). Additionally, the proposed approach designs two guidance-route generation strategies for two special situations to demonstrate the effectiveness of GRFC in complex task environments. Theoretical analysis reveals that the proposed control protocol for guidance command can ensure the overall stability and tracking accuracy of the system. Numerical simulations are performed to illustrate the theoretical results, and verify that the proposed approach can achieve coordinated formation control precisely in a complex task environment.     

AS35083直升机发动机控制系统的检查与排故方法

通过分析AS35083直升机装备的阿赫耶ARRIEL281发动机控制系统的原理，深入研究发动机控制系统引起的故障，从外场维护的角度提出快速确认故障部件的具体方案。     

Dynamics of air transport networks: A review from a complex systems perspective

Air transport systems are highly dynamic at temporal scales from minutes to years. This dynamic behavior not only characterizes the evolution of the system but also affect the system's functioning. Understanding the evolutionary mechanisms is thus fundamental in order to better design optimal air transport networks that benefits companies, passengers and the environment. In this review, we briefly present and discuss the state-of-the-art on time-evolving air transport net-works. We distinguish the structural analysis of sequences of network snapshots, ideal for long-term network evolution (e.g. annual evolution), and temporal paths, preferred for short-term dynamics (e.g. hourly evolution). We emphasize that most previous research focused on the first modeling approach (i.e. long-term) whereas only a few studies look at high-resolution temporal paths. We conclude the review highlighting that much research remains to be done, both to apply already available methods and to develop new measures for temporal paths on air transport networks. In particular, we identify that the study of delays, network resilience and optimization of resources (aircraft and crew) are critical topics.     

终极控股股东超额控制与多元化折价实证分析

以2006年至2012年中国A股上市公司为样本考察终极控股股东超额控制对多元化经营行为及其经济后果的影响.实证结果表明：终极控股股东出于谋取自身利益的目的,会倾向于利用多元化经营进行利益转移,因此超额控制程度较高的上市公司多元化程度更高.此外,由于,超额控制程度的提高会加剧公司中的委托代理问题,因此与超额控制程度较低的上市公司相比,在超额控制程度较高的上市公司中实施多元化经营会导致更为严重的多元化折价.     

Broyden算法在测量沙质样品介电常数实验中的应用

针对波导取样法测量沙质样品介电常数实验中复超越方程求解问题,提出用Broyden秩1迭代算法解决.     

机加工艺是数控加工技术的基础

数控加工技术是机械加工领域中的先进技术 ,应用越来越普及 ,但企业需要的数控技术专门人才却严重缺乏。怎样才能培养出优秀的数控技术专门人才 ?通过数控技能大赛中出现的一些问题进行分析 ,提出和论述了机加工艺是数控加工技术的基础 ,指出了培养数控技术人才的方向     

利用IVI驱动程序在LabVIEW中构建测试系统

讨论了IVI驱动程序的特点、测试系统结构、MAX配置IVI 仪器过程,介绍了在LabVIEW环境中实现IVI编程的方法.