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Renewable energy resources, such as wind, are available worldwide. Locating areas with high and continual wind sources are crucial in pre-planning of wind farms. Vast offshore areas are characterized by higher and more reliable wind resources in comparison with continental areas. However, offshore wind energy production is in a quite preliminary phase. Elaborating the potential productivity of wind farms over such areas is challenging due to sparse in situ observations. The Mediterranean basin is not an exception. In this study we are proposing numerical simulations of near-surface wind fields from regional climate models (RCMs) in order to obtain and fill the gaps in observations over the Mediterranean basin. Four simulations produced with two regional climate models are examined here. Remote sensing observations (QuikSCAT satellite) are used to assess the skill of the simulated fields. A technique for estimating the potential energy from the wind fields over the region is introduced. The wind energy potential atlas and the map of a wind turbine's functional range are presented, locating the potentially interesting sub-regions for wind farms. The ability of models to reproduce the annual cycle and the probability density function of wind speed anomalies are detailed for specified sub-regions. 相似文献
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根据干扰弹在起燃时间内辐射能量急剧增加的特点,利用图像序列中图像灰度斜率的突变进行干扰检测是一种比较有效的方法。利用仿真选择有效的数据平滑方法对灰度变化斜率进行估计,以消除焦平面探测器采样特性和噪声的影响,定量分析了影响干扰弹检测概率的各种因素,评价了利用辐射特征检测干扰弹的优点与不足。 相似文献
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济南钢铁集团总公司第三炼钢厂1#连铸机由奥钢联公司设计制造,其扇形段共14段,其中水平段(7-14段)采用智能扇形段(ASTC)。智能扇形段电气控制系统具有严密的控制逻辑及可靠的控制精度,通过对水平段辊缝的实时动态控制,可有效提高扇形段辊缝的控制精度,提高了铸坯质量。 相似文献
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Georg Jung John Hatcliff 《International Journal on Software Tools for Technology Transfer (STTT)》2007,9(5-6):417-427
Large distributed systems, including real-time embedded systems, are increasingly being built using sophisticated middleware
frameworks. Communication in such systems is often realized using in terms of asynchronous events whose propagation is implemented
by an underlying publish/subscribe service that hooks components into a generic event communication channel. Event correlation—a mechanism for monitoring and filtering events—has been introduced in some of these systems as an effective technique for
reducing network traffic and computation time. Unfortunately, even though event correlation is used heavily in frameworks
such as ACE/TAO’s real-time event-channel and in mission critical contexts such as Boeing’s Bold Stroke avionics middleware,
the industry standard CORBA Component Model (CCM) does not include a specification of event correlation. While previous proposals
for event correlation usually offer sophisticated facilities to detect combinations in the stream of incoming events, they
have not been constructed to fit within the CCM type system, and they offer relatively little support for transforming and
rearranging filtered events into meaningful output events. In this paper, we present the design rationale, syntax, and semantics
for a new and highly flexible model for event correlation that is designed for integration into the CCM type system. Our model
has been integrated and tested in the Cadena development and analysis framework, which has been designed to support development
of mission-control applications in the Boeing Bold Stroke framework.
This work was supported in part by the US Army Research Office (DAAD190110564), by DARPA/IXO’s PCES program (AFRL Contract
F33615-00-C-3044), by NSF (CCR-0306607) and by Lockheed Martin. 相似文献
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构件技术已经发展成为软件复用的主流技术,CORBA构件模型是一种全新的服务器端构件模型,它鼓励通过构件组装来搭建应用系统,从而简化了CORBA应用程序的开发过程,提高了软件生产率和复用程度。该文在CORBA构件模型规范的基础上给出了一个实现框架,详细讨论了在该框架下CORBA构件的实现过程。 相似文献