在强化管理的实践中提高民航和谐度

中国民航在新一轮发展中尚存在诸多不和谐和的地方,这有体制、机制问题,有人力资源、经费短缺问题,也有设施设备、技术等问题,将直接影响发展进程,有些甚至成了发展的瓶颈。诸如此类,作为民航基层单位是很难解决的,最现实、也是最有针对性的,那就是深化管理,以管理促和谐,以和谐强管理,尽快地从当前粗放式管理走向规范化、制度化、科学化管理的轨道上来。构建和谐民航,从其要素的结构上讲,就是民航各系统、领域、单位、部门乃至各环节的关系稳定、协调、有序。作为促进和谐重要手段之一的管理,其基本职能就是组织、计划、协调、监督、控制等…     

国防CAE软件应用调查报告

CAE,即计算机辅助工程,主要指用计算机对所设计的产品的功能、性能与可靠性等进行计算和优化设计,对未来的工作状态和运行环境进行模拟仿真,并优化设计方案,以证实未来工程产品的实际性能。CAE可以用于静/动力学分析、流体力学分析、振动/弹性分析、热传导分析、噪声分析、辅助实验设计和虚拟样机制造等方面,并为上述领域的工作带来革命性的变化。目前,CAE工具已成为工程师们基本的工作手段,很多领域已是必须依靠CAE才能有效工作,例如在航空领域中,由于对产品高性能和高可靠性的需求,因此对CAE仿真平台也提出了更高的要求,航空企业迫切需要通过高性能的仿真平台对不同部件进行系统开发,以便在设计的初期阶段就可以对系统关键属性进行仿真分析。本次调查以问卷形式,面向CAE软件供应商、相关领域用户和相关研究机构3个方面展开。在CAE供应商方面,主要面向在国防领域有较多应用的供应商,如:安世亚太、ANSYS、ABAQUS、MSC、LMS、ESI、SAMTECH、DS、Altair、Solidworks和紫瑞CAE等;相关领域用户主要有:航空制造工程研究所、南京液压机电研究所、第一飞机设计研究院、沈飞集团、齐二机床集团、航天一院、航天五院...     

飞行员 管制员 指挥协调员全面交流合作项目启动

飞行员、空中交通管制员、机场指挥协调员承担了连接航班保障的三个关键环节的安全指挥管理职责,三方协作确保航班空中、地面服务正常、顺畅。由东航集团公司、民航局空管局、机场集团主办,三方团委承办的"飞行员、管制员、指挥协调员全面交流合作项目启动仪式"于4月18日在上海举行。民航局空管局局长王利亚、党委书记王战斌、副局长朱士新、党委副书记范芸芸,东航集团党组书记李军、党组副书记、股份公司总经理马须伦,东航集团副总经理、纪检组组长刘江波,上海机场集团公司党委书记、副董事长何卫国,总裁、党委副书记李德润,党委副书记、副董事长、副总裁朱宁一等出席了启动仪式。     

北京华瑞:专业、专注

北京华瑞飞机部件维修服务有限公司,作为国内较早的航空部件修理企业,多年来主要从事自动飞行控制系统、舱压控制系统、仪表、电源系统、灯光等系统各类机载电子、电气、附件的维修。同时,还承担着空调系统、水系统、防冰系统、气源系统附件的修理。其中一些项目,包括 B737 SCU、B747 BSCU、FCSV,     

当心支架超龄服役 致空调室外机坠落伤人

针对目前大量空调室外机支架超龄服役、危及人身财产安全的问题,上海、北京、天津、重庆、香港、澳门、大连、厦门、青岛、深圳、沈阳、长春、哈尔滨、南京、杭州、济南、武汉、广州、成都、西安、昆明等21城市消协(消委会、消保委)及中国消费者报社,共22家消费维权单位联合发布消费警示:当心支架超龄服役致空调室外机坠落伤人。22家消费维权单位指出,随着高楼大厦的不断崛起,空调的安装位置也越来越高,但近年来由于空调室外机支架年久失修、"老弱病残"造成的坠机事故日渐增多,以往鲜被人关注的小小支架变身为悬在人们头上的"利器"。而此前由于没有统一的空调支架安装规范,市场上的空调支架质量良莠不齐,一些支架是由非标钢材或废钢料制成,承载能力明显不够,更有部分厂家粗制滥造,导致支架容易锈蚀腐烂,不但给消费者的人身财产安全带来隐患,也严重     

石家庄飞机工业有限责任公司

中航工业石家庄飞机工业有限责任公司,隶属于中国航空工业集团公司,主要从事轻型通用飞机研制生产,是国内通用飞机的专业化整机生产厂。公司始建于1970年,经过近40年的发展,公司已发展成为集航空产品、民用产品等多种产品为一体的技术密集型企业。公司在数控加工、钣金、机加、冲压、铆接、钳焊、表热处理、复合材料加工及飞机部装、总装、试飞、塑压、模夹具、型架设计制造等方面具有独特的技术优势,具备通用飞机的研发、     

我和我的职业精神

<正>飞行员、乘务员、安检员、机务、监察员、管制员、教师、学生、气象预报员、加油调度员、空港大巴司机、行李装卸工、急救医生、人民警察……民航各个工种各个岗位,都有自己职业的特点和精神。在日前举行的全国民航团委"我和我的职业精神·民航强国梦"主题演讲比赛中,参赛选手代表全国民航34万青年,从不同角度阐述了对职业精神的理解、诠释和凝炼,表达了建设民航强国的坚定信念、信心和决心。在演讲者的讲述中,观众时而领略世界屋脊雪域高原的壮美,时而感受地震灾区救援现场的紧张;时而跟随飞行员翱翔在蓝天,时而又来到机场塔台繁忙的管制大厅。酷热的维修机坪、寒冷的执勤现场;喧闹的候机大厅、孤独的值班岗位……一幕幕场景烘托出民航各个岗位不一样的艰辛,一个个故事     

高原机场的特点与设计探讨

我国幅员辽阔,地区间的差异较大,著名的青藏高原、云贵高原均位于我国西部地区,全国的高原机场、高高原机场全部集中在我国的西北、西南地区,主要分布在我国的西藏、云南、青海、甘肃、四川等地的高山峡谷地带。2005年我国共有开通民用航空运输的定期航班民用和军民合用机场136个（含未开展旅客运输的梧州机场）,颁发了机场使用许可证的停航保管机场7个（安康、朝阳、黎平、广元、阜阳、九江和梧州）,不含民航停止使用的吉林机场,全国机场总数142个。截止到2007年底,     

来吧,从浦东机场飞往东南亚

<正>上海机场在直飞东南亚的新、马、泰、越、柬等20多个航点的基础上,积极携手航空公司新辟、加密飞往东南亚的航线,丰富旅客选择。R日本游"降温"导致东南亚旅游线路持续火爆,为此上海机场在直飞东南亚的新、马、泰、越、柬等20多个航点的基础上,积极携手航空公司新辟、加密飞往东南亚的航线,丰富旅客选择。2月20日,亚洲航空长途公司载有377名乘客的A330飞机从吉隆坡抵达上海浦东国际机场,这标志着亚洲最大的低成本航空公司正式通航上海。     

穿越时空 静享古文化氛围——体味上海齐九思收藏会馆

<正>牌坊、楹联、牌匾、石雕、石刻、石缸、雕花门窗、长廊、徽派建筑风格……这不是在广袤原野的古村落,而是在大都市上海的闵行区内,荟萃于上海齐九思收藏会馆。在上海齐九思收藏会馆里,不经意间,处处会发现古文化的痕迹。围墙上嵌有红砂石的清代的石雕,刻画着《二十四孝之百里负米、卧冰求鲤、恣蚊饱血》的故事。迈入牌楼,进入深深庭院,水池中喷泉而出的雕刻精细的龙头则是明代的建筑。精致的宅院风景独特,翠竹摇曳,盆景点缀,曲径通幽,长廊蜿蜒。     

The effect of inlet conditions on the flow and heat transfer in multiple rotating cavity with axial throughflow

This paper discusses experimental results from two different build configurations of a heated multiple rotating cavity test rig.Measurements of heat transfer from the discs and tangential velocities are presented.The test rig is a 70% full scale version of a high pressure compressor stack of an axial gas turbine engine.Of particular interest are the internal cylindrical cavities formed by adjacent discs and the interaction of these with a central axial throughflow of cooling air.Tests were carried out for a range of non-dimensional parameters representative of high pressure compressor internal air system flows(Re up to 5×106 and Rez up to 2×105).Two different builds have been tested.The most significant difference between these two build configurations is the size of the annular gap between the(non-rotating) drive shaft and the bores of the discs.The heat transfer data were obtained from thermocouple measurements of surface temperature and a conduction solution method.The velocity measurements were made using a two component,LDA system.The heat transfer results from the discs show differences between the two builds.This is attributed to the wider annular gap allowing more of the throughflow to penetrate into the cavity.There are also significant differences between the radial distributions of tangential velocity in the two builds of the test rig.For the narrow annular gap,there is an increase of non-dimensional tangential velocity V/Ωr with radial location to solid body rotation V/Ωr=1.For the wider annular gap,the non-dimensional velocities show a decrease with radial location to solid body rotation.      

Research on Auto-detection for Remainder Particles of Aerospace Relay Based on Wavelet Analysis

Aerospace relay is one kind of electronic components which is used widely in national defense system and aerospace system. The existence of remainder particles induces the reliability declining, which has become a severe problem in the development of aerospace relay. Traditional particle impact noise detection (PIND) method for remainder detection is ineffective for small particles, due to its low precision and involvement of subjective factors. An auto-detection method for PIND output signals is proposed in this paper, which is based on direct wavelet de-noising (DWD), cross-correlation analysis (CCA) and homo-filtering (HF), the method enhances the affectiv-ity of PIND test about the small particles. In the end, some practical PIND output signals are analysed, and the validity of this new method is proved.     

Preparation of Highly Dispersed Antimony-doped Tin Oxide Nano-powder via Ion-exchange Hydrolysis of SnCl4 and SbCl3 and Azeotropic Drying

Antimony-doped tin hydroxide colloid precipitates have been synthesized by hydrolysis of SnCl4 and SbCl3 using: (1) an ion-exchange hydrolysis to remove chlorine ions, and (2) isoamyl acetate as an azeotropic solvent to obviate water. The obtained dried powder is of high dispersivity without any need for further grinding. The size and dispersivity of the final particles are investigated with the aid of TG-DTA, BET, XRD and TEM. After having calcined, the antimony-doped tin oxide nanopowder possesses a tetragonal rutile structure with high dispersivity, uniform particles and low hard agglomeration.     

Effects of Mo on the Microstructure and Hydrogen Sorption Properties of Ti-Mo Getters

The effects of Mo on the microstructure evolution, porosity and hydrogen sorption properties of Ti-Mo getters are investigated in this work. The results show that the addition of Mo prolongs the densification process of Ti-Mo getters and results in a significant amount of sintered pores. With the Mo content increasing, the porosity of getters firstly increases reaching the maximum value as it at- tains about 7.5wt.%, and then drops. At the room temperature, the hydrogen sorption property of getters increases progressively with the Mo content increasing, but the tendency is not very clear before its content lies below 2.5wt.%. When the Mo content achieves about 7.5wt.%, the hydrogen sorption property proves to be the best. The discussion is made about the above mentioned phenomena inclusive of hydrogen sorption properties of getters under different activation conditions (from 500-750 ℃).     

超声速燃烧数值模拟中的湍流与化学反应相互作用模型

高精度数值模拟有助于理解超声速湍流燃烧中湍流与化学反应的相互作用,可为发动机燃烧室等工程应用设计提供可靠的预测模型。除直接数值模拟外,目前在湍流燃烧应用中使用的大涡模拟和雷诺平均Navier-Stokes模拟均需要借助模型模化发生在湍流小尺度上的流动与化学反应过程对湍流大尺度运动的影响。现有的湍流与化学反应相互作用模型大致可分为:火焰面类模型和概率密度函数类模型,2类模型在不同的应用中各自具有优势和局限性。此外,现有模型大都基于低马赫数燃烧,而超声速燃烧中通常会伴随快速混合、局部熄火和再着火以及激波等复杂过程,这为发展其中的湍流与化学反应相互作用模型提出了更多的挑战。     

适于低轨卫星IP网络的单核共享树组播算法(英文)

为了解决低轨卫星IP网络中现有典型源组播算法的信道资源浪费问题,本文提出了一套单核共享树组播算法,即核心群合并共享树(CCST)和加权核心群合并共享树(w-CCST)算法。CCST 算法包括动态近似中心(DAC)选核方法和核心群合并组播路径构建方法。DAC方法专为周期、规律运动的低轨卫星网络提出,不需要复杂的星上计算。在核心群合并方法中,以核节点作为初始核心群,通过核心群和剩余组成员的最短路径方法逐步扩展直至整棵组播树构建完成,从而使得组播树的树代价最小,大大提高了网络的带宽利用率和组播传输效率。w-CCST 算法中所提出的加权因子可以调整树代价和端到端传播时延之间的折衷程度,因此,可以通过调整加权因子来适度增大树代价、降低端到端传播时延以支持某些端到端时延要求苛刻的实时组播业务。最后,与低轨卫星 IP 网络中典型算法进行了性能比较,仿真结果说明,CCST 算法的平均树代价比其它算法显著降低,w-CCST 算法的平均端到端传播时延小于 CCST 算法。     

Jet Vectoring Control Using a Novel Synthetic Jet Actuator

A primary air jet vectoring control system with a novel synthetic jet actuator (SJA) is presented and simulated numerically. The results show that, in comparison with an existing traditional synthetic jet actuator, which is able to perform the duty of either “push” or “pull”, one novel synthetic jet actuator can fulfill both “push” and “pull” functions to vector the primary jet by shifting a slide block inside it. Therefore, because the new actuator possesses greater efficiency, it has potentiality to replace the existing one in various appli- cations, such as thrust vectoring and the reduction of thermal signature. Moreover, as the novel actuator can fulfill those functions that the existing one can not, it may well be expected to popularize it into more flow control systems.     

Nonlinear Adaptive Slewing Motion Control of Spacecraft Truss Driven by Synchronous V-gimbaled CMG Precession

The slewing motion control of a truss arm driven by a V-gimbaled control-moment-gyro (CMG) is a nonlinear control problem. The V-gimbaled CMG consists of a pair of gyros that must precess synchronously. The moment of inertia of the system, the angular momentum of the gyros and the external disturbances are not exactly known. With the help of feedback linearization and recursive Lyapunov design method, an adaptive nonlinear controller is designed to deal with the unknown items. Performance of the proposed controller is verified by simulation.     

An SOR Implicit Time-accurate Scheme in Calculating Unsteady Flows

A new time-accurate marching scheme for unsteady flow calculations is proposed in the present work. This method is the combination of classical Successive Over-Relaxation (SOR) iteration method and Jacobian matrix diagonally dominant splitting method of LUSGS. One advantage of this algorithm is the second-order accuracy because of no factorization error. Another advantage is the low computational cost because the Jacobian matrices and fluxes are only calculated once in each physical time step. And, the SOR algorithm has better convergence property than Gauss-Seidel. To investigate its accuracy and convergency, several unsteady flow computa- tional tests are carried out by using the proposed SOR algorithm. Roe’s FDS scheme is used to discritize the inviscid flux terms. Un- steady computational results of SOR are compared with the experiment results and those of Gauss-Seidel. Results reveal that the numerical results agree well with the experimental data and the second-order accuracy can be obtained as the Gauss-Seidel for unsteady flow computations. The impact of SOR factor is investigated for unsteady computations by using different SOR factors in this algorithm to simulate each computational test. Different numbers of inner iterations are needed to converge to the same criterion for different SOR factors and optimal choice of SOR factor can improve the computational efficiency greatly.