The report discusses 21 papers on topics including general structures; steel bridges; concrete bridges; field testing and nondestructive evaluation of transportation structures; tunnels and underground structures; culverts and hydraulic structures; structural fiber-reinforced polymers; and critical transportation infrastructure protection.

关键词：钢铁；桥梁；结构分析；性能评估；无损检测；钢筋混凝土

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The Center for Nondestructive Evaluation at Iowa State University has experience in development of measurement techniques and new sensors using a variety of interrogating energies. This research evaluated feasibility of three technologies—x-ray radiation, groundpenetrating radar (GPR), and magnetic flux leakage (MFL)—for detection and quantification of corrosion of embedded reinforcing steel.The methods provide useful and complementary information. GPR provides a rapid approach to identify reinforcing steel that has anomalous responses. MFL provides similar detection responses but could be optimized to provide more quantitative correlation to actual condition. Full implementation could use either GPR or MFL methods to identify areas of concern, followed by radiography to give a visual image of the actual condition, providing the final guidance for maintenance actions.

关键词：钢铁；桥面板；缓蚀剂；钢筋混凝土；无损测验；路面罩面；桥梁护栏

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Sound amalgams can be fabricated by substituting Ga-In liquid for mercury; Cu-coated steel fibers bond well with the amalgam components. Inclusion of steel fibers significantly improved mechanical properties. An application scenario utilizing amalgams for in-space parts fabrication and repair was suggested. Procedure and materials need to be optimized.

关键词：钢铁；汞中毒；汞；金属纤维；机械性能

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This document consists of 14 papers that explore construction road user costs in rural areas, value of tablet computers in transportation construction inspection, benefits of three- and four-dimensional computer-aided design models, comparison of public-private partnerships and traditional procurement methods, construction manager-general contractor delivered projects, and volumetric and mechanistic test variability on predicted performance of asphalt pavement.

关键词：钢铁；高速公路桥；沥青混凝土路面；项目管理；农村地区；热拌沥青混凝土

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随着科技的不断发展和计算机网络技术的革新，现代化的通信技术和手段已经能够很好的克服时间和空间的限制，使得沟通不再受到距离的影响。现代化通信技术在我国铁路中也得到了广泛应用，使得列车上的旅客能更快捷的与外界进行信息交流，为满足铁路列车高速化发展的需求，建立完善的铁路通信系统加强现代通信技术在我国铁路中的应用，能够有效确保列车的安全。本文对现代通信技术在我国铁路中的应用进行了简要的分析，并对通信信号一体化技术的基本特点和我国现代铁路通信技术的发展趋势进行了概括。

关键词：计算机网络技术；通信技术；铁路；通信网络

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Marine coatings are coatings that are specially made for the manufacture and maintenance of commercial and military ships as well as fixed and floating marine structures. They are applied to commercial ships including freight carriers, tows, cruise ships, yachts, and others to improve the life and efficiency of these assets and protect them from the corrosive effect of sea water. Marine coatings are not only used for esthetic purposes, they are primarily used for their functional benefits.

关键词：船舶涂料；制造；维护；商用；军用船舶

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中国证券网3月3日报道，2月27日，交通运输部部长杨传堂主持召开部务会议，会议审议并原则通过了《关于废止7件铁路规章的决定》和《关于促进我国邮轮运输业持续健康发展的指导意见》。这也标志，《关于促进我国邮轮运输业持续健康发展的指导意见》出台在即。

关键词：港口航运业；要闻综述

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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.

关键词：自治；太空探索；自适应控制；探险车；机器人；自动控制

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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.

关键词：空中力量；军事顾问；固定翼飞机；军事援助；军事训练；旋转翼

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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.

关键词：飞机设计；结构稳定性；失效模式；舱壁；数学模型

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