The aim of this book, the first of two volumes, is to present selected research that has been undertaken under COST Action IC0902 ‘‘Cognitive Radio and Net- working for Cooperative Coexistence of Heterogeneous Wireless Networks’’ (http://newyork.ing.uniroma1.it/IC0902/). COST (European Cooperation in Sci- ence and Technology) is one of the longest-running European frameworks sup- porting cooperation among scientists and researchers across Europe.
上传时间： 2020-05-26
上传用户：shancjb
The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of 2005 there were 100 open WCDMA networks and a total of over 150 operators having frequency licenses for WCDMA operation. Currently, the WCDMA networks are deployedinUniversalMobileTelecommunicationsSystem(UMTS)bandaround2GHz in Europe and Asia including Japan and Korea. WCDMA in America is deployed in the existing 850 and 1900 spectrum allocations while the new 3G band at 1700/2100 is expected to be available in the near future. 3GPP has defined the WCDMA operation also for several additional bands, which are expected to be taken into use during the coming years.
标签： HSDPAHSUPA Access Speed Radio UMTS High for
上传时间： 2020-05-27
上传用户：shancjb
Since the 1990s the EU has been pursuing climate change mitigation targets. Following the international commitment to the legally binding greenhouse gas reduction under the Kyoto Protocol, the 2020 policy package consists of a set of binding legislation to ensure that the EU meets its climate and energy targets for the year 2020. The package sets three key targets: 20% reduction in greenhouse gas emissions (from 1990 levels), 20% of EU energy from renewables (as well as a 10% target for renewable fuels) and 20% improvement in energy efficiency. The targets were set by EU leaders in 2007 and enacted in legislation in 2009 3 . They are also headline targets of the Europe 2020 strategy for smart, sustainable and inclusive growth.
标签： Preparatory Ecodesign Study
上传时间： 2020-06-06
上传用户：shancjb
RFID networks are currently recognized as one a research area of priority. Research activities related to RFID technology have been booming recently. A number of ongoing projects are being funded in Europe, Asia, and North America. According to leading market analysts, the development of the RFID market is projected to increase from approximately $3 billion in 2005 to $25 billion in 2015. Several countries have dedicated innovation programs to support and develop RFID systems and related technologies: the RFID initiative in Taiwan, Ubiquitous Japan and the NSF SBIR program in the USA. The EU has recently advertised its Strategic Research Roadmap concerning the Internet of Things, which first of all refers to the RFID technology before being extended to commu- nicating devices as in M2M (Machine to Machine). In this roadmap, several application domains have been identified:
上传时间： 2020-06-08
上传用户：shancjb
說明：1，测试交流电源（Test AC Power Supply）：A.中国（China）：AC 220V+/-2%50Hz+/-2%B.美国（United States of America）：AC 120V+/-2%60Hz+/-2%。C.英国（Britain）：AC 240V+/-2%50Hz+/-2%D.欧洲（Europe）：AC 230V+/-2%50Hz+/-2%E.日本（Japan）：AC 100V+/-2%60Hz+/-2%F.墨西哥（Mexico）：AC 127V+/-2%60Hz+/-2%2，测试温度条件（Test Temperature Conditions）：25℃+/-2℃。3，测试以右声道为准（Standard Test Use Right Channell）4，信号由AUX插座输入（Signal From AUX Jack Input）。5，测试以音量最大，音调和平衡在中央位置（电子音调在正常状态）。（Test Volume Setup Max，Equalizer And Balance Setup Center）。6，标准輸出（Standard Output）：A.输入1 KHz频率信号（Input 1 KHz Frequency Signal）B.左右声道输入信号测试右声道（L&R Input Signal Test Use R Channel）C.额定输出功率満（Rating Output Power Full）10 W，标准输出定为1w.（Rating Output Power Full 10 w，Standard Output Setup 1 W）D.额定输出功率1W到10w，标准输出定为500 mW（Rating Output Power 1 W To 10 W，Standard Output Setup 500 mW）E.额定输出功率小于1w，标准输出定为50 mW（Rating Output Power Not Full 1 W，Standard Output Setup 50 mW）F.标准輸出电压以V-VPR为准（Standard Output Voltage Use V-V/PR）。G.V-V/PR中P为额定输出功率，R为喇叭标称阻抗。
标签： 音响功放
上传时间： 2022-06-18
上传用户：wky20090436
