2013年4季度，世界经济复苏势头渐显。从国际经济形势来看，美国经济受益于个人消费、出口、非居民住宅固定资产投资以及私人库存投资的增加而持续增长，欧元区在经历了债务危机的打击之后正在慢慢恢复元气，而日本经济则受制于私人部门消费增长没能达到预期和出口不振的影响，增速明显低于预期。从国内形势来看，中国经济增速稳中向好。根据国家统计局的初步核算，2013年全年国内生产总值568845亿元，按可比价格计算，比上年增长7.7%。分季度看，1季度同比增长7.7%，2季度增长7.5%，3季度增长7.8%，4季度增长7.7%。经济的平稳运行给交通运输业的发展创造了良好的环境，使得交通运输各部门取得了较为平稳的发展：整体运行呈现1季度回落、2季度企稳、3季度向好和4季度平稳发展的态势。交通运输业企业景气程度持续回升，客货运输增速保持平稳，行业固定资产投资结构进一步优化。

An aircraft health monitoring system is a tool used to monitor and enhance flight safety, and reduce operational time and maintenance cost. This tool functions by recording actions, performance, and status of aircraft components into a remote database. Aircraft health monitoring systems then collect these data from various aircraft components, systems, and subsystems, to reach a certain resolution, based on algorithms programmed into the collect ion system. The aircraft health monitoring systems' products are mainly deployed in airlines to monitor unanticipated events, and to reduce unscheduled maintenance and disruption in operations.

Marine composites are materials used in the construction of off-shore structures and boat components to increase performance, decrease fuel consumption, and significantly reduce carbon dioxide emissions. They are often used as alternatives to traditional materials such as aluminum and steel. Composites such as glass fiber-reinforced plastics and CFRP are currently being widely used in the manufacture of boats and other marine vessels. Marine composites are also used in subsea applications as protection structures for subsea wellheads and valves.

Fasteners play a vital role in the Aerospace industry and are used to build jetliners, business jets, fighters, military helicopters, rotorcraft, and satellites. The Aerospace industry uses standard fastener types, which include bolts, screws, studs, rivets, collars, and pins. Aerospace fasteners should be of par high quality. The fasteners used in the Aerospace industry need to withstand high pressure and temperature. Moreover, they should be more durable and lightweight, since this helps to reduce the weight of an aircraft.

Plastic is a synthetic material made from moldable synthetic polymer of higher molecular mass. Some of the different types of plastic are polystyrene, nylon, rayon, and polyvinyl chloride. Plastic has several applications and is used in a variety of products; one such notable application of plastic is in the Aerospace industry. Plastic is used in the manufacture of aircraft windshields, windows, fairings, seats, etc.

This paper discusses the importance of implementing advanced autonomous technologies supporting operations of future NASA missions. The ability for crewed, uncrewed and even ground support systems to be capable of mission support without external interaction or control has become essential as space exploration moves further out into the solar system. The push to develop and utilize autonomous technologies for NASA mission operations stems in part from the need to reduce operations cost while improving and increasing capability and safety. This paper will provide examples of autonomous technologies currently in use at NASA and will identify opportunities to advance existing autonomous technologies that will enhance mission success by reducing operations cost, ameliorating inefficiencies, and mitigating catastrophic anomalies.

This thesis was written to satisfy graduation requirements from the Joint Advance Warfighting School at the Joint Forces Staff College, Norfolk, VA. The thesis argues that the Services must develop an integrated and coordinated joint methodology to organize and train general purpose forces (GPF) as air advisors for fixed-wing and rotary-wing aviation security force assistance (AvSFA) missions. It also proposes a joint solution to flexibly increase the depth and breadth of GPF air advisor capability without burdening the Services with creating additional force structure. The core of the proposed joint solution is to create Joint GPF AvSFA Unit Type Codes (UTCs). Upon implementation, the Services will possess taskable packages of GPF fixed-wing, rotary-wing, and aviation support capability. These three AvSFA UTCs could be used independently or employed in concert to support the theater campaign plans of the geographic combatant commands. Eight recommendations result from the thesis. The three primary recommendations are to adopt the proposal, to identify a lead Service to chair joint implementation, and to convene a joint working group to determine the precise composition of the recommended GPF AvSFA UTCs.

The hybrid wing body center section test article is an all-composite structure made of crown, floor, keel, bulkhead, and rib panels utilizing the Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) design concept. The primary goal of this test article is to prove that PRSEUS components are capable of carrying combined loads that are representative of a hybrid wing body pressure cabin design regime.

High resolution calibrated near infrared (NIR) imagery of the Space Shuttle Orbiter was obtained during hypervelocity atmospheric re-entry of the STS-119, STS-125, STS-128, STS-131, STS-132, STS-133, and STS-134 missions. This data has provided information on the distribution of surface temperature and the state of the airflow over the windward surface of the Orbiter during descent. The thermal imagery complemented data collected with onboard surface thermocouple instrumentation. The spatially resolved global thermal measurements made during the Orbiter s hypersonic re-entry will provide critical flight data for reducing the uncertainty associated with present day ground-to-flight extrapolation techniques and current state-of-the-art empirical boundary-layer transition or turbulent heating prediction methods. Laminar and turbulent flight data is critical for the validation of physics-based, semi-empirical boundary-layer transition prediction methods as well as stimulating the validation of laminar numerical chemistry models and the development of turbulence models supporting NASA s next-generation spacecraft. In this paper we provide details of the NIR imaging system used on both air and land-based imaging assets. The paper will discuss calibrations performed on the NIR imaging systems that permitted conversion of captured radiant intensity (counts) to temperature values. Image processing techniques are presented to analyze the NIR data for vignetting distortion, best resolution, and image sharpness.

Landing mission concepts that are being developed for exploration of planetary bodies are increasingly ambitious in their implementations and objectives. Most of these missions require accurate position and velocity data during their descent phase in order to ensure safe soft landing at the pre-designated sites. To address this need, a Doppler lidar is being developed by NASA under the Autonomous Landing and Hazard Avoidance (ALHAT) project. This lidar sensor is a versatile instrument capable of providing precision velocity vectors, vehicle ground relative altitude, and attitude. The capabilities of this advanced technology have been demonstrated through two helicopter flight test campaigns conducted over a vegetation-free terrain in 2008 and 2010. Presently, a prototype version of this sensor is being assembled for integration into a rocket-powered terrestrial free-flyer vehicle. Operating in a closed loop with vehicle's guidance and navigation system, the viability of this advanced sensor for future landing missions will be demonstrated through a series of flight tests in 2012.