Broadband Wireless Access (BWA) has become one of the major evolution trends in the fields of broadband access and mobile communications. However,some difficulties emerged during the application and industrialization ...Broadband Wireless Access (BWA) has become one of the major evolution trends in the fields of broadband access and mobile communications. However,some difficulties emerged during the application and industrialization of the BWA system,which calls for typical service models,key technology innovations and backbone support from broadband Internet. This article introduces a Broadband Wireless Multimedia (BWM) access system. It aims to build a new-type "triple play" BWA network by integrating terrestrial digital TV system and the BWA system,and by taking broadband Internet as its core network platform. A primary research shows that the new BWA system is an effective solution to the existing difficulties of BWA system. Moreover,it is quite competitive in service provision,service coverage,frequency planning,terminal power consumption and cost for network construction.展开更多
通过对Access World News数据库和Press Display数据库的对比,探讨了全球两大媒体数据库各自的优势、特点和问题,通过案例,分析了图书馆咨询人员面对不同课题需求时数据库的工作策略。提出应该充分发挥各个数据库的功能优势,同时对数据...通过对Access World News数据库和Press Display数据库的对比,探讨了全球两大媒体数据库各自的优势、特点和问题,通过案例,分析了图书馆咨询人员面对不同课题需求时数据库的工作策略。提出应该充分发挥各个数据库的功能优势,同时对数据库自身的各种问题进行人工干预和后期处理,从而对研究课题进行最大程度的资料挖掘和分析。展开更多
The terrorist attacks in the United States last month have not slowed down the process of China′saccession to WTO.It is expected that China will eventually join WTO this November.Currently China isworking intensively...The terrorist attacks in the United States last month have not slowed down the process of China′saccession to WTO.It is expected that China will eventually join WTO this November.Currently China isworking intensively to revise its economic and foreign trade laws and regulations in conformity with the WTOrules.According to sources from the Ministry of Foreign Trade and Economic Cooperation(MOFTEC),China is to adopt the following measures to further encourage foreign investment in China.展开更多
医疗新技术准入评估是医疗技术纳入临床应用前的重要一环,对保证医疗服务质量和医疗安全具有关键性作用。但在准入评估具体实践过程中,还存在着准入理论框架不完善、评估指标体系不健全等问题。以卫生政策及法律法规为战略支撑,借鉴医...医疗新技术准入评估是医疗技术纳入临床应用前的重要一环,对保证医疗服务质量和医疗安全具有关键性作用。但在准入评估具体实践过程中,还存在着准入理论框架不完善、评估指标体系不健全等问题。以卫生政策及法律法规为战略支撑,借鉴医院卫生技术评估(Hospital-based Health Technology Assessment,HB-HTA)的理论和方法,综合考虑评估主体、评估客体、评估内容等核心要素,从技术特性、安全性、有效性、经济性、适用性等维度进行指标体系设计,构建引进型医疗新技术准入评估框架,以期为医疗机构医疗技术准入管理提供理论框架和循证基础。展开更多
文摘Broadband Wireless Access (BWA) has become one of the major evolution trends in the fields of broadband access and mobile communications. However,some difficulties emerged during the application and industrialization of the BWA system,which calls for typical service models,key technology innovations and backbone support from broadband Internet. This article introduces a Broadband Wireless Multimedia (BWM) access system. It aims to build a new-type "triple play" BWA network by integrating terrestrial digital TV system and the BWA system,and by taking broadband Internet as its core network platform. A primary research shows that the new BWA system is an effective solution to the existing difficulties of BWA system. Moreover,it is quite competitive in service provision,service coverage,frequency planning,terminal power consumption and cost for network construction.
文摘通过对Access World News数据库和Press Display数据库的对比,探讨了全球两大媒体数据库各自的优势、特点和问题,通过案例,分析了图书馆咨询人员面对不同课题需求时数据库的工作策略。提出应该充分发挥各个数据库的功能优势,同时对数据库自身的各种问题进行人工干预和后期处理,从而对研究课题进行最大程度的资料挖掘和分析。
文摘The terrorist attacks in the United States last month have not slowed down the process of China′saccession to WTO.It is expected that China will eventually join WTO this November.Currently China isworking intensively to revise its economic and foreign trade laws and regulations in conformity with the WTOrules.According to sources from the Ministry of Foreign Trade and Economic Cooperation(MOFTEC),China is to adopt the following measures to further encourage foreign investment in China.
文摘医疗新技术准入评估是医疗技术纳入临床应用前的重要一环,对保证医疗服务质量和医疗安全具有关键性作用。但在准入评估具体实践过程中,还存在着准入理论框架不完善、评估指标体系不健全等问题。以卫生政策及法律法规为战略支撑,借鉴医院卫生技术评估(Hospital-based Health Technology Assessment,HB-HTA)的理论和方法,综合考虑评估主体、评估客体、评估内容等核心要素,从技术特性、安全性、有效性、经济性、适用性等维度进行指标体系设计,构建引进型医疗新技术准入评估框架,以期为医疗机构医疗技术准入管理提供理论框架和循证基础。
