Technical Requirements and System Architecture of IPTV Services

Delivering IPTV services entails a complex integration of a variety of industries as well as the support of network,computer,and image processing technologies. That is to say,the IPTV architecture should carry a myriad of services and technologies. In light of current telecom/TV status,the IPTV architecture can be set up on the convergence of the three networks to deliver comprehensive services and make Live TV,TV on Demand (TVOD),and Time-shifted TV services accessible on one platform. It also supports local and cross-regional user and service certification,provides EPG and smooth TV images and guarantees secured content as well.

上海市公共卫生监督技术服务机构消毒产品检验能力现况调查

目的 掌握本市公共卫生监督技术服务机构消毒产品检验能力现状,为完善对该类机构的指导与管理提供科学依据。方法 2021年8—11月,采用信息查询、问卷和现场调查的方法对上海市公共卫生监督技术服务机构中具备消毒产品领域资质的检验检测机构进行调查,描述和分析机构基本情况、专业技术人员、业务能力和业务开展等。结果 调查机构34家,其中企业制机构18家(52.9%)、事业制机构16家(47.1%)。企业制机构和事业制机构在从业人数、实验室面积和专业技术人员的分布上均存在明显差异(P <0.05)。72.2%的企业制机构为小微企业[5.6%微型企业(<10人),66.6%小型企业(10~<100人)],事业制机构从业人数均在100人以上;83.3%的企业制机构实验室面积为2 000 m2以下,87.5%的事业制机构为2 000 m2以上;企业制机构的专业技术人员年龄结构更年轻,学历相对较低,毕业于卫生相关专业的较少,无职称人员占比较高。消毒产品检验能力较为全面的机构占5.9%,各机构检验能力数(以方法计)7~344项,85.3%的机构检验能力数少于30项,只有5.9%的机构能力数达到100项以上。55.9%的机构消毒产品检验领域年业务额为0,41.2%的机构该领域占年总业务额不超过5.0%,2020年较2019年报告量呈明显增加。结论 本市第三方机构在消毒产品检验能力储备、人员能力等方面有待进一步提升,应加强技术能力储备、优化技术人才培养、拓展消毒产品业务领域。建议相关部门加强对机构的指导和引导,进一步加强质量控制机构管理协调职能,推动公共卫生监督技术服务机构健康发展。

上海市公共卫生技术服务机构传染病防治检测技术服务能力现况调查

目的 了解上海市公共卫生技术服务机构传染病防治检测技术服务能力现状,为进一步提升传染病防治检测技术服务行业总体能级水平提出建议,为相关政策和措施制定提供科学依据。方法 2020年4—6月,对上海市开展公共卫生技术服务的社会机构和市区两级疾病预防控制机构开展问卷调查,收集2019年度开展传染病防治检测技术服务的业务量和市场供需,以及截至2020年6月在6大类40项传染病防治检测技术服务细分领域能力参数的储备情况。结果 被调查机构2019年全年共提供31 763次传染病防治领域检测技术服务。社会委托性质技术服务为主要需求方,出具社会委托性质报告占报告总数的78.3% (24 859份),社会机构为该领域检测技术服务的主要提供方,出具报告占报告总数的73.1%(23 207份)。截至2020年6月,能力储备率最高的是医疗机构环境卫生学监测项目(82.7%),最低的是消毒灭菌设备项目(11.5%)。疾病预防控制机构的传染病防治领域检测技术服务总体能力储备率(50.0%)高于社会机构(25.9%),在医疗器械及物品细菌学监测、消毒剂项目的能力储备率上疾病预防控制机构和社会机构存在差异(P<0.05)。环氧乙烷低温灭菌综合性能监测/化学监测能力参数尚为“零能力储备”。结论 上海市传染病防治领域检测技术服务市场已形成一定规模,检测技术服务能力储备已有一定基础,疾病预防控制机构总体能力储备高于社会机构。细分领域能力储备不均衡,部分能力欠缺有待提升。疾病预防控制机构和社会机构共同作为传染病防治领域检测技术服务提供方,发挥各自优势特点,依托质量控制中心平台,共同提升传染病防治领域检测技术服务能力水平,促进传染病防治领域检测技术服务行业发展。

A semantic web services discovery approach based on a mobile agent using metadata

Purpose-The success of web services involved the adoption of this technology by different service providers through the web,which increased the number of web services,as a result making their discovery a tedious task.The UDDI standard has been proposed for web service publication and discovery.However,it lacks sufficient semantic description in the content of web services,which makes it difficult to find and compose suitable web services during the analysis,search,and matching processes.In addition,few works on semantic web services discovery take into account the user’s profile.The purpose of this paper is to optimize the web services discovery by reducing the search space and increasing the number of relevant services.Design/methodology/approach-The authors propose a new approach for the semantic web services discovery based on the mobile agent,user profile and metadata catalog.In the approach,each user can be described by a profile which is represented in two dimensions:personal dimension and preferences dimension.The description of web service is based on two levels:metadata catalog and WSDL.Findings-First,the semantic web services discovery reduces the number of relevant services through the application of matching algorithm“semantic match”.The result of this first matching restricts the search space at the level of UDDI registry,which allows the users to have good results for the“functional match”.Second,the use of mobile agents as a communication entity reduces the traffic on the network and the quantity of exchanged information.Finally,the integration of user profile in the service discovery process facilitates the expression of the user needs and makes intelligible the selected service.Originality/value-To the best knowledge of the authors,this is the first attempt at implementing the mobile agent technology with the semantic web service technology.