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1.
We introduce a new architecture for the design of a tool for modeling and simulation of continuous and hybrid systems. The environment includes a compiler based on Modelica, a modular and a causal standard specification language for physical systems modeling (the tool supports models composed using certain component classes defined in the Modelica Standard Library, and the instantiation, parameterization and connection of these MSL components are described using a subset of Modelica). Models are defined in Modelica and are translated into DEVS models. DEVS theory (originally defined for modeling and simulation of discrete event systems) was extended in order to permit defining these of models. The different steps in the compiling process are show, including how to model these dynamic systems under the discrete event abstraction, including examples of model simulation with their execution results. 相似文献
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MIMO (Multiple-Input Multiple-Output)的显著优点就是在不增加带宽的情况下,能够成倍地提高通信系统容量和频谱利用率,是未来移动通信与个人通信系统实现高速率数据传输,提高高传输质量的重要途径,也是未来移动通信系统广泛采用的关键技术.文中简要介绍了MIMO系统及其一种新的MIMO系统中的应用技术,即PARC(Per-antenna Rate Control)技术. 相似文献
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ZHANG Zu-fan DU Hui-ping JIANG Ze Chongqing University of Posts Telecommunications Chongqing China University of Electronic Science Technology of China Chengdu China 《中国邮电高校学报(英文版)》2006,13(4):29-33
1 Introduction The calling dwell time characteristic is critical for the user network planning and deployment, e.g., global system for mobile communications (GSM), as well as the next generation wireless multimedia networks, such as, the currently standar… 相似文献
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为了能够实现定位精度的自适应,本文分析了认知无线电定位系统(cognitive positioning systems,CPS)的原理。该系统利用频谱及环境感知等模块中的传感器单元来获取所需的定位参数,并将其与到达时间(time of arrival,TOA)定位估计算法相结合,以克拉美罗下界(Cramer-Rao lower bound,CRLB)为准则分析最大似然(maximum likelihood,ML)定位精度自适应算法。本文还对单径和多径环境条件下定位精度自适应性能进行了比较。仿真结果表明,该算法能够实现定位精度的自适应,并能通过改善系统可用的频带带宽、分散频谱的数目、信号的调制方式等因素来提高定位精度。 相似文献
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Culture is globally recognized as an important driving force for a sustainable creative economy. The importance of participation in the design and cultural creative industries is sufficient research, especially from the perspective of emerging economies. Therefore, designers need a framework to guide them on creating sustainable culture-appropriate products that reflect their users. From cultural memory, integrated design is a new design method to embed users, beliefs, and expectations based on computer Field Programmable Gate Array (FPGA), and Machine Learning (ML) provides products design and services with performance values. Gradually in the global market, the focus on local styles has become a trending style of the current economic development strategies of various countries promoting cultural and creative industries. The advent of creative design applications has changed the global competitive culture's creative product design advantage of the industry. Cultural creative product design emphasizes art, the humanization of creative life and aesthetics has gradually become the emerging economic force. Design technology products, cognitive psychology, information technology, and design a combination of computer application technology, object, and the standard model of the present invention have been designed and developed according to the product's characteristics. 相似文献
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Li Hongjian Wei Yaojun Xiong Yu Ma Enjie Tian Wenhong 《The Journal of supercomputing》2021,77(10):11575-11596
The Journal of Supercomputing - With the fast growth of big data applications, it has brought about a huge increase in the energy consumption for big data processing in Cloud data centers. In this... 相似文献
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Zhu Mingrui Li Jie Wang Nannan Gao Xinbo 《International Journal of Computer Vision》2021,129(6):1820-1836
International Journal of Computer Vision - Face sketch synthesis has a wide range of applications in both digital entertainment and law enforcement. State-of-the-art examplar-based methods... 相似文献
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Xu Furong Liu Ke Yu Zhuliang Deng Xin Wang Guoyin 《Neural computing & applications》2021,33(14):8513-8524
Neural Computing and Applications - It is a long-standing challenge to reconstruct the locations and extents of cortical neural activities from electroencephalogram (EEG) recordings, especially... 相似文献