共查询到20条相似文献,搜索用时 15 毫秒
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Julian Parker 《Computer Fraud & Security》2003,2003(10):4-5
The Woolf Reforms, recently instituted to make civil litigation more user friendly, targeted, amongst other things, the investigator’s best friend, the Anton Piller Order (AP). The Order was targeted directly, by having its name changed to the Search Order, and indirectly, in that Woolf aimed to make claimants expend more effort in finding solutions before resorting to the “nuclear option” of the AP. 相似文献
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插入式电磁继电器仍在广泛应用。既然已经有了使用多年的固态继电器和种类多、价格低的集成印刷电路板电磁继电器,为什么还要重新设计插入式电磁继电器?原因在于,插入式继电器能够很好的解决许多问题。实际上,在工业和商业应用中,几十年前设计的传统插座式电磁继电器仍然能够高效地解决困扰工业和商业应用多年的负荷开关问题。 相似文献
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在对公交收费系统的发展和无线射频识别技术进行研究的基础上,分析了现行公交收费系统的优缺点与局限性,并提出了一种公交车远卡自动收费系统的设计思路.主要使用ARM核芯片STM32、射频芯片nRF24LE1等器件,完成了硬件设计.在软件设计上实现了自动计算票价的扣费机制.该系统创新性地将远距离射频技术应用在公交收费系统中,不仅方便了乘客,而且大大提高了乘客上下车的效率. 相似文献
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Y. S. Moon 《Artificial Intelligence Review》1990,4(1):47-52
Today the world's fastest economic growth area is in the Far East. Besides Japan, the four Small Dragons of Asia; Hong Kong, Singapore, South Korea and Taiwan are achieving very outstanding results in industry and trade. Their large foreign incomes will enable them to carry out substantial technology development programmes. An AI programme is certainly a possible candidate, considering Japan's Fifth Generation Project. This paper surveys the backgrounds of these Dragons from many perspectives: economical, cultural, political, historical ... and speculates on the future roles which AI may play in these nations. China, which has so many ties with these Dragons is also included in the discussion. 相似文献
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有源相控阵天线远场测试系统设计 总被引:1,自引:0,他引:1
为解决某型有源相控阵天线辐射特性测试占机时间长、系统不稳定、交付能力不满足生产需求等问题,开展了有源相控阵天线辐射特性校准与测试技术研究。针对被测产品体积小、频段高、天线单元多以及交付数量大的特点,选择了较为合适的远场测试系统的设计方案。测试系统硬件构成复杂,包含微波暗室、接收转台、发射扫描架、测控单元、水冷系统等;测试软件涉及项目多,包含幅度相位校准、方向图测试、指向精度补偿测试、等效全向辐射功率(EIRP)测试、有源增益测试等。重点对微波暗室尺寸设计、高精密转台精度分析、幅度相位校准算法和波束指向误差补偿技术进行了详细论述,完成了该型有源相控阵天线远场测试系统的软、硬件设计。测试系统精度高、动态范围大、运行稳定。该设计方案具有较好的推广价值。 相似文献
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Lichuan Liu Wei Li Xianwen Wu Benjamin X. Zhou 《IEEE/CAA Journal of Automatica Sinica》2019,6(3):778-788
Recently, lots of research has been directed towards natural language processing. However, the baby's cry, which serves as the primary means of communication for infants, has not yet been extensively explored, because it is not a language that can be easily understood. Since cry signals carry information about a babies' wellbeing and can be understood by experienced parents and experts to an extent, recognition and analysis of an infant's cry is not only possible, but also has profound medical and societal applications. In this paper, we obtain and analyze audio features of infant cry signals in time and frequency domains. Based on the related features, we can classify given cry signals to specific cry meanings for cry language recognition. Features extracted from audio feature space include linear predictive coding (LPC), linear predictive cepstral coefficients (LPCC), Bark frequency cepstral coefficients (BFCC), and Mel frequency cepstral coefficients (MFCC). Compressed sensing technique was used for classification and practical data were used to design and verify the proposed approaches. Experiments show that the proposed infant cry recognition approaches offer accurate and promising results. 相似文献
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位置验证是提高无线网络中位置服务安全的有效方案.为此,提出基于到达时间(TOA,time of arrival)的位置验证系统(LVS,location verification system),记为TOA-LVS.在TOA-LVS中,首先依据LVS,推导决策规则,随后采用FFA(far field approximation)模型,导出TOA-LVS的虚警率和检测率的表达式.最后,通过仿真,验证所推导的虚警率和检测率表达式的正确性,并与基于接收信号强度(RSS,received signal strength)的LVS(RSS-LVS)比较,结果表明提出的TOA-LVS在检测率、归一化信息熵以及错误率方面均优于RSS-LVS. 相似文献
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本文介绍一种采用乘法器与加法器相结合电路替代一般零中频接收机中A/D转换电路的方法。该电路实现简单,灵敏度高,具有很高的信号实时处理能力,已被成功应用于某UHF无源非接触IC读卡器中,有效提高了读写距离。 相似文献
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今天,许多零售企业都需要一个可升级的POS系统解决方案,以减少成本,改进服务顾客的能力,同时支持公司的快速扩张计划。升级的具体目的包括减少POS运行成本、新店开张成本、与POS应用有关的商店培训费用、总咨询台问讯量等等。 相似文献