电子系统的

• Increasing scale of integration and consumption of power has led to the significant increase in power densities encountered in modern electronic equipment . if we do not pay attention to the thermal management of electronic equipment , the large amount of heat generated by the electronic device would not be under the control . especially in some atrocious surroundings , some devices " working temperature would exceed the rated temperature limit and lead to deteriorate the system stabilization or even make the hole system disabled
  现代电子设备的集成度不断提高、功耗不断加大，使得热流密度急剧上升，如果我们在设计阶段不注重电子设备的散热设计，那么元件所产生的热流将得不到有效控制，特别是在工作环境比较恶劣或电子设备比较复杂的情况下某些元件的工作温度就有可能上升到导致整个电子系统的工作不稳定乃至失效。
• Although most other exchanges are heading in the opposite direction in commodity markets such as the nymex pressure from " locals " self - employed traders is helping to prop up open - outcry although some reckon that customers pay up to five times as much as with electronic systems . even the ipe has no plans to abolish its floor
  虽然其它绝大多数交易所正在取消这种公开叫价的交易方式，在纽约商品交易所这类商品市场里，来自“本地人”那些自营商的压力却起到了支持公开叫价的作用，尽管一些人估计客户为此要支付五倍于使用电子系统的费用。
• In recent years , with the rapid development of the modern electrics , electro - magnetic compatibility ( emc ) becomes more and more important in modem electronic system which has higher and higher operation frequency and power consumption . hence , it becomes one of the major problems encountered in the modern electronic system design
  近年来，随着电子技术的飞速发展，电子系统的频率越来越高，某些系统的功率也越来越大，整个电子系统的电磁兼容的问题逐渐突出，并且日益成为系统级设计的首要考虑问题。
• These systems operate on a wide variety of continuous time signals , which include speech , medical imaging , sonar , radar , electronic warfare , instrumentation , consumer electronics and telecommunications systems ( terrestrial and satellite ) . one of the key to the success of these systems has been advances in the development of the font end of the electronic systems - analog - to - digital converters ( a / d ) which converter the continuous - time stimuli signals to discrete - time binary - coded form
  这些系统可广泛地应用于处理连续时间信号，包括语音、医学成像、声、雷达、电子对战、仪器、消费电器、远程通讯(地面和卫星)等，而这些系统成功的关键因素之一就是电子系统的前端部件? ? a d取得了长足的进步( a d把连续时间信号转换成离散时间、二进制编码的数字信号，便于后级精确的数字信号处理) 。
• This thesis combines the merits of distributed system and those of parallel system , and the monolithic processor conjunction distributed system is changed into networked parallel computing conjunction distributed system , which is applied in important component of navy integrated electronic system for the first time - surface vessel command and control system . on account of the handling speed of networked parallel computing conjunction is higher than that of monolithic processor conjunction , so the handling speed of whole distributed system is improved
  本文结合了分布式系统和并行系统的优点，将单机结点的分布式系统改造为网络并行计算结点的分布式系统，并首次应用于海军综合电子系统的重要组成部分? ?水面舰载指控系统中，由于网络并行计算结点的处理速度高于单机结点，从而提高了整个分布式系统的处理速度。
• With an explosive growth of microelectronics , micro - mechanism and advanced materials , micro - satellite has stepped into small - bulk , light - quantity and high - function - density recently . research of general cell based on soc could reduce the bulk of the micro - satellite and improve the effective - load greatly , which is important for the localization , miniaturization , low - power , multi - function , high - performance and high - reliability of our satellite electronic system
  研究基于soc ( systemonchip )技术的“微型核” ,可以减小卫星的体积并大大提高小卫星的有效载荷,对我国卫星电子系统的国产化、小型化、低功耗、多功能、高性能和高可靠性具有重要的意义。
• The design complexity and system function of electronic system have been increasing largely , the competition from the global also shorten the design period , therefore , the demand for the tools of electronic design automatic is tremendous and the requirement for efficiency of eda tools is more and more precise
  电子系统的设计复杂性和系统功能一直在呈几何级数增长，全球的竞争又加剧了产品开发周期的缩短。因此，对电子设计自动化工具的需求越来越迫切，要求也日益提高，这一切促进了eda的发展，加速了设计方法和设计工具的更新换代。
• The technology of frequency synthesis is important in latter - day communication system . it ’ s widely used in wireless communication and electron system . with the high - speed development of technologies , higher stability , higher purity , broader range and larger output number of frequency are required in the frequency source of frequency synthesizer which is the core of this technology
  频率合成技术是近代通信系统的重要组成部分,在无线电通信与电子系统的各个领域中得到了广泛的应用。随着各种技术的飞速发展,人们对频率合成器的频率稳定度、频谱纯度、频率范围和输出频率的个数提出了越来越高的要求。
• Quantum spin systerm in low dimensions has been one of the most attractive field in condensed matter physics for many decades . not only because of many meaningful properties of such systerms , but also in the field the existence of simplified models , which serve as paradigms for understanding and studying the role of strong interactions in many - electron systems
  近年来，低维量子自旋系统一直是凝聚态物理学中最活跃的研究领域之一，不仅因为它自身的一些特殊性质，而且因为其中存在着许多简化模型，能够作为理解研究强关联多电子系统的范例。
• Through applying the cad software , this paper not only searches after the methods and traits of i - deas when it is used in solve complicated electronic equipment design , but also offers useful reference to the reliability design of devices , and settles a base for realizing the cam for the electronic equipment design
  本课题通过对大型cad软件i - deas的开发应用，不仅探索出了i - deas软件用于解决复杂工程问题的方法及应用特点，而且通过具体应用为电子系统的可靠性设计提供重要参考，也为实现电子设备的计算机辅助设计奠定基础。