多目标进场航班调度优化策略研究

对终端区进场航班调度问题,以延误损失和航班序列鲁棒性为目标,建立多目标进场航班调度优化模型。针对建立的模型运用RHC蚁群算法进行优化求解,同时对优化后的序列组进行鲁棒性排序,选出既能够降低航空公司延误损失,又能提高航班序列鲁棒性的优化序列。在仿真验证中,RHC蚁群算法策略与FCFS策略相比,延误损失降低21%。表明RHC蚁群优化策略能够大大降低航空公司的延误损失,提高航班序列的鲁棒性,从而降低管制员工作负荷。     

基于加权马尔科夫的航班延误预测研究

航班延误问题是大型枢纽机场运行管理的一个难题,针对这个问题建立基于加权马尔科夫链的定性定量预测模型,在传统马尔科夫的基础上引入加权的概念,并结合定性与定量方法进行综合预测。定性预测航班延误的升、降趋势;以延误率为依据,将延误状态分为4个级别,定量预测下一时间段的延误状态。两种方法相互检验、相互补充。结合某机场实例进行验证,实验结果表明:模型计算方便,能有效预测航班延误情况,为机场管理提供决策依据。     

批评话语分析视角下的主观报道倾向与中国国家形象建构

以美国《时代》周刊中国援助菲律宾海燕台风的相关报道为语料,运用批评话语分析中的过度词化、重新词化、选择性真实和意识方块对新闻标题和主要新闻事件所建构的中国负面形象进行了分析,指出意识形态分歧、美国的价值观念和国家利益决定了美国媒体对华报道的中国负面形象建构倾向和报道偏见。     

单飞现象：我国运动训练管理的人性追问

摘要：“单飞现象”是我国专业训练体制和市场化机制共同作用的结果,引发了人们对我国竞技体育管理的思考,同时为我国优秀运动员的培养开辟了一条新的路径。以“单飞现象”为切入点,从人性的视角对我国运动训练管理进行考察,发现我国运动训练管理中将运动员视为“政治形象或者民族形象的符号和工具”,认为人都具有“自私”的本性,在这种人性假设基础上建立起来的人性结构是残缺的,从而使我国运动训练的管理性质产生了伦理困境。进而站在完整的人性的角度,对我国运动训练管理人性结构进行整体性建构,从内涵、结构与性质三个方面对我国运动训练管理的人性化提出了新的构想。     

A Victorian hope for aerial navigation: Argyll as a theorist of flight and the first president of the Aëronautical Society of Great Britain

In 1866 the Aëronautical Society of Great Britain was founded with George Douglas Campbell, 8th Duke of Argyll (1823–1900) as first president, and patron. The purpose of the society was to further the study of aerial navigation as well as to make aeronautics a respectable science, and today the society--now the Royal Aeronautical Society--serves as a professional body dedicated to aerospace research. There were two fundamental areas of scientific knowledge key to the society in its initial decades: 1) a detailed understanding of the principles of bird flight, and 2) the practical application of that knowledge in the construction of flying machines. Argyll firmly belonged to the former being a well-seasoned ornithologist and theorist of flight, and, with the publication of his best-selling book The Reign of Law (1867), was one of the first to popularise the theoretical principles of bird flight. In this paper, I examine the relationship between bird and mechanical flight through Argyll's ornithological studies, with a focus on the various factors early in Argyll's life that led to his eventual position as president of the Aëronautical Society. By analysing the influence of his family relations, home environment and religious convictions, I show how Argyll’s scientific undertakings existed as part of a wider network of theistic Victorian aristocrats who contributed to the creation and professionalization of scientific disciplines in a way that contrasted markedly with the methods of many of the scientific naturalists.     

浅谈强化理论在乘务组飞行管理中的应用

强化理论的应用是做好乘务组飞行管理可资借鉴的手段和方式,应用强化理论有利于提高服务质量和工作效率,促进航班工作的正常运行.针对目前乘务组特点,合理使用强化理论的多种方式,可以在乘务组飞行管理中实现正向目标的达成.强化理论在民航服务岗位基层管理中的应用还有应注意的各项技术性问题.     

一种多功能先进刀具的研究

在现代零件车削加工生产中,提高加工质量与效率,降低生产成本,是生产者着重考虑的问题。以一种多功能高速切削内孔的先进刀具为研究对象,展示如何改善刀头切削条件、提高刀头强度,改善排屑和散热条件,降低切削力,进而提高车刀耐用度,提高切削用量,实现高速强力扩孔、镗孔的高效组合车削,达到提高生产效率、降低加工成本的目的。