The application environments of wireless Ad hoc networks require that it should support Quality of Service (QoS). However, that is very difficult because of the inherent characteristics of the wireless channel and the...The application environments of wireless Ad hoc networks require that it should support Quality of Service (QoS). However, that is very difficult because of the inherent characteristics of the wireless channel and the frequent changes of network topology caused by nodes movement. An Ad hoc QoS Multicasting (AQM) protocol can solve this problem by previously reserving the neighbor nodes for tracking resource availability. By considering QoS restrictions of transport delay, loss ratio, bandwidth requirement, delay jitter, and throughout, and by finding the adaptive routing, the AQM protocol can obviously improve the efficiency of multicastsession. The results of network simulation show that QoS is essentially applicable to Ad hoc networks.展开更多
BACKGROUND： Spring water therapies have been used since at least 1550 BC. Despite the growing body of evidence supporting these therapies for a range of conditions, including musculoskeletal, dermatological, respirat...BACKGROUND： Spring water therapies have been used since at least 1550 BC. Despite the growing body of evidence supporting these therapies for a range of conditions, including musculoskeletal, dermatological, respiratory and cardiovascular conditions, they do not currently form part of mainstream healthcare in many countries. The protocol established in this paper aims to support systematic reviews that examine the health outcomes associated with human exposure to regional spring waters, using the Australia and New Zealand context as a case study. METHODS/DESIGN： The protocol searches for studies in eight health/medical databases, searches three local health/medical journals, and includes forwards and backwards searching. Standard systematic review methods are used including： specifying pre-deterrnined inclusion criteria and data management plans, appraising the studies for bias, and allocation to a hierarchy of evidence. DISCUSSION： The protocol supports a review and comprehensive synthesis of the current evidence regarding the health effects of natural spring water, and can be adapted for reviews in other regions. From this evidence, recommendations regarding practice and future research can be made on the therapeutic role of spring water.展开更多
常规的新闻演播室系统主要依赖自动化控制,但大量的自动化应用增加了系统的运行负担,进而影响新闻制作的实时性与稳定性。鉴于此,设计基于网际互连协议(Internet Protocol,IP)电影和电视工程师协会(The Society of Motion Picture and T...常规的新闻演播室系统主要依赖自动化控制,但大量的自动化应用增加了系统的运行负担,进而影响新闻制作的实时性与稳定性。鉴于此,设计基于网际互连协议(Internet Protocol,IP)电影和电视工程师协会(The Society of Motion Picture and Television Engineers,SMPTE)2110流的新闻演播室系统。在硬件层面,该系统配备HDVF-L750//CCN彩色寻像器和IP画面分割器;在软件层面,建立演播室IP SMPTE2110流标准协议,以此作为演播室内媒体传输的基础,确保演播室内视频、音频和辅助数据的高质量传输。此外,开发新闻演播视频格式文件读取程序,该程序能够分析新闻演播视频文件的格式和编码标准,确定需要支持的文件类型,从而满足新闻演播视频文件的读取与播放需求。经过测试,系统的运行性能较好,具备实际应用价值。展开更多
文摘The application environments of wireless Ad hoc networks require that it should support Quality of Service (QoS). However, that is very difficult because of the inherent characteristics of the wireless channel and the frequent changes of network topology caused by nodes movement. An Ad hoc QoS Multicasting (AQM) protocol can solve this problem by previously reserving the neighbor nodes for tracking resource availability. By considering QoS restrictions of transport delay, loss ratio, bandwidth requirement, delay jitter, and throughout, and by finding the adaptive routing, the AQM protocol can obviously improve the efficiency of multicastsession. The results of network simulation show that QoS is essentially applicable to Ad hoc networks.
文摘BACKGROUND： Spring water therapies have been used since at least 1550 BC. Despite the growing body of evidence supporting these therapies for a range of conditions, including musculoskeletal, dermatological, respiratory and cardiovascular conditions, they do not currently form part of mainstream healthcare in many countries. The protocol established in this paper aims to support systematic reviews that examine the health outcomes associated with human exposure to regional spring waters, using the Australia and New Zealand context as a case study. METHODS/DESIGN： The protocol searches for studies in eight health/medical databases, searches three local health/medical journals, and includes forwards and backwards searching. Standard systematic review methods are used including： specifying pre-deterrnined inclusion criteria and data management plans, appraising the studies for bias, and allocation to a hierarchy of evidence. DISCUSSION： The protocol supports a review and comprehensive synthesis of the current evidence regarding the health effects of natural spring water, and can be adapted for reviews in other regions. From this evidence, recommendations regarding practice and future research can be made on the therapeutic role of spring water.
文摘常规的新闻演播室系统主要依赖自动化控制,但大量的自动化应用增加了系统的运行负担,进而影响新闻制作的实时性与稳定性。鉴于此,设计基于网际互连协议(Internet Protocol,IP)电影和电视工程师协会(The Society of Motion Picture and Television Engineers,SMPTE)2110流的新闻演播室系统。在硬件层面,该系统配备HDVF-L750//CCN彩色寻像器和IP画面分割器;在软件层面,建立演播室IP SMPTE2110流标准协议,以此作为演播室内媒体传输的基础,确保演播室内视频、音频和辅助数据的高质量传输。此外,开发新闻演播视频格式文件读取程序,该程序能够分析新闻演播视频文件的格式和编码标准,确定需要支持的文件类型,从而满足新闻演播视频文件的读取与播放需求。经过测试,系统的运行性能较好,具备实际应用价值。
