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1481.基于纹理信息与深度图空时梯度的深度图上采样算法
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-31]
针对基于"2D+深度"数据表示格式的3D视频数据,在编码前对深度图进行降采样编码能够有效地降低码率,然而引入的降采样失真将会影响合成图像的质量。因此,如何有效地在解码端进行上采样以降低降采样失真的影响成为了当前研究的关键问题。本文提出了基于纹理信息与深度图空时梯度的深度图上采样算法,基于深度序列中图像间的时间梯度,图像像素点的水平梯度和垂直梯度,确定深度图像素间的时空相关性,对采样参考点进行决策,从而利用相关的参考点对深度图进行上采样。实验表明,本文方法提高了深度序列的编码性能和最终合成的虚拟视点图像的质量。
关键词：深度图编码；深度图采样；视点合成；梯度
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1482.高速动车组降弓浪涌过电压分析
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-31]
高速动车组受电弓降弓过程产生的暂态过电压,严重威胁车载电气设备的安全运行。基于某型动车组的实体与接地方式,构建了高速动车降弓过程的等效电路分析模型,分析了车体浪涌过电压特性以及接地电阻、互感器、降弓瞬间电压相位对其幅值的影响。结果表明:高速动车组降弓时,各个车体过电压波形基本一致,最高过电压幅值达到4.7KV;过电压随接地电阻增大而增大,其中接地电阻取0.5Ω较为合适;同时电压互感器电感值越大,车体过电压峰值越大;接触网网压相位为90°、270°时,降弓过电压幅值最大。以上结论为提出降低车体浪涌过电压的措施提供了理论基础。
关键词：高速动车组；降弓；浪涌过电压；接地电阻；电压互感器；网压相位
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1483.航空航天CPS的优化重构自动驾驶仪设计
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-29]
A modular flight control strategy is presented here to demonstrate the improved command tracking performance with fault tolerance and reconfiguration capabilities. The modular control design process consists of inner and outer loop design concept, where outer baseline controller feedback loop ensures the stability and robustness and inner reconfigurable design is responsible for the fault-tolerance against actuator faults/failures. This guarantees augmented autonomy and intelligence on board aircraft for real time decision and fault tolerant control. Requirements for aerospace cyber physical systems (ACPS) and software are far more stringent than those found in industrial automation systems. The results shows that fault tolerant aspect is mandatory for ACPS, that must support real time behavior and also requires ultra-high reliability as many systems or/sub-systems are safety critical and require certification.
关键词：模块化飞行；控制策略；航空航天CPS
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1484.多变量闭环辨识及其在机组的锅炉汽轮机系统中的应用
[铁路、船舶、航空航天和其他运输设备制造业,汽车制造业] [2015-08-29]
In this chapter, a new technique for multivariable closed-loop identification is presented. On the basis of process input and output data in the control loops, the process frequency-response matrix is estimated with signal decomposition and frequency spectrum analysis, and then a transform-function matrix is identified by least square method. The required input and output data are obtained while the processes are still in normal closed-loop operation. The closed-loop identification is applied to the boiler-turbine coordinated control system of power unit. Simulation example is given to show both effectiveness and accuracy of the identification method for boiler-turbine unit.
关键词：闭环辨识；频率响应；多变量系统；锅炉
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1485.船舶动力定位系统的混合性能控制器设计
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-28]
The mixed controller design problem of Dynamic Positioning Systems for Ships (DPSS) is discussed in this paper. Based on the H_2 control scheme, passivity theory and Lyapunov function, the sufficient conditions are derived into Linear Matrix Inequality (LMI) problems which can be solved by convex optimization algorithm. Therefore, the mixed performance controller can be designed via solving proposed sufficient conditions for guaranteeing the mixed performance of DPSS with minimized output energy and initial conditions. Finally, the simulation results are presented to demonstrated the effectiveness and useful of the proposed design method.
关键词：DPSS；混合性能；无源化； H_2方法
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1486.呈现给NRCC的空军工程技术
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-26]
No abstract available.
关键词：替代能源；替代燃料的资格；汽车燃料
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1487.全球多电飞机市场报告（2015-2019年）
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-24]
MEA are advanced next-generation aircraft that use more electrical systems to reduce the nonpropulsive power systems such as mechanical, hydraulic, and pneumatic systems. This has resulted in a reduction in the weight of the aircraft, leading to a low cost of ownership, usage of less fuel, a reduction in emissions, increased reliability, and other added benefits.
关键词：MEA；电力系统；动力系统；机械；液压；气动
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1488.全球机场旅客检查系统市场报告（2015-2019年）
[公共管理、社会保障和社会组织,铁路、船舶、航空航天和其他运输设备制造业,信息传输、软件和信息技术服务业] [2015-08-22]
Passengers have to undergo strict security screening procedures before boarding an aircraft. Passenger screening commonly includes pat-down searches, metal detectors, and full-body scanners. As air passenger traffic has grown, large airports find it difficult to process passengers through security checkpoints without impacting operational efficiency. As a result, advanced passenger screening systems (based on backscatter X-ray and millimeter wave technologies) are being used at airports worldwide, in addition to existing hand-held and walk-through metal detectors.
关键词：乘客；安检程序；搜身；金属探测器；全身扫描仪；航空客运量；乘客筛选系统
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1489.全球商用飞机舱内设施市场报告（2015-2019年）
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-20]
A commercial aircraft cabin interior generally consists of lights, seats, windows, windshields, IFEC, galley, and lavatories. The design of the lights and seats, color combinations, and other value add-ons boost the overall look of an aircraft's interior.
关键词：商用飞机；飞机舱；舱内设施
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1490.全球商用与军用飞机设备维护市场报告（2015-2019年）
[铁路、船舶、航空航天和其他运输设备制造业] [2015-08-20]
Aircraft maintenance, repair and overhaul has become one of the essential components by which to ensure fleets are properly maintained for airworthiness and to safely transport passengers.
关键词：商用飞机；军用飞机；飞机维修；飞机设备维护
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