资讯

<正>尼康两款产品荣获TIPA2010年度奖项欧洲技术影像出版协会(TIPA)授予两款尼康产品以2010年度重要奖项:尼康D3S数码单反光相机——"2010年度TIPA最佳专业数码单反相机";AF-S70～200mm F2.8GEDVRⅡ——"2010年度TIPA最佳专业镜头"。     

旧符新桃 明基西门子新机两款

明基西门子AF51手机；明基西门子CL71手机[编者按]     

DiffServ中AF业务带宽分配公平性

通过在opnet6.0下进行计算机仿真实验及数据分析,研究Diffserv网络中AF业务类间和AF业务类里分别在欠载,过载情况下带宽分配的公平性问题,发现AF类间有较好的公平性,而在AF类里,受RTT,TCP连接数目,非响应流等因素的影响,并没有较好的带宽分配公平性。     

ABB控制系统在紫金80万t棒材线中的应用

介绍了ABB公司的AC450系列集散控制系统在杭钢80万t棒材生产线中的应用，着重描述了系统配置和控制功能，以及ABB的MB300和AF100总线在系统中的应用。     

数码适配机身

这台名叫数码福来克斯（DigiFlex）装置是由哈斯曼（也称“骑士”）公司设计制造的数码适配机身，它能将尼克尔卡口的各种镜头与哈苏接口的中画幅数码后背组合在一起，构成一套中画幅数码单反摄影系统，可获得专业级画质，以此确保摄影师胜任最苛求任务的要求。     

卓越影像，源自尼克尔镜头：拍摄更加秀丽的风光

风光摄影是很大众化的一种摄影类型，所涉及的范围还是相当广泛的，包括自然风光．城市建筑和国外人文等。相信大家平时拍的最多的就是我们身边的风景了，为了拍如效果理想的风景图片，不仅要找准被摄主体，更为关键的是如何既准确又艺术地表现出主体的独特魅力。[第一段]     

低介电常数、低CTE、高Tg PCB基材的制法

通过实例介绍了低介电常数、低CTE、高Tg印制电路板基材的制法。     

Effects of hydraulic retention time,temperature, and effluent recycling on efficiency of anaerobic filter in treating rural domestic wastewater

With rural population expansion and improvement of the socio-economic standard of living, treatment of rural domestic wastewater has rapidly become a major aspect of environmental concern. Selection of a suitable method for treatment of rural domestic wastewater depends on its efficiency, simplicity, and cost-effectiveness. This study investigated the effects of hydraulic retention time(HRT), temperature, and effluent recycling on the treatment efficiency of an anaerobic filter(AF) reactor. The first round of experimental operations was run for three months with HRTs of one, two, and three days, temperatures of 18℃, 21℃, and 24℃, and no effluent recycling. The second round of experimental operations was conducted for another three months with HRTs of three and four days; temperatures of 30.67℃, 30.57℃, and 26.91℃; and three effluent recycling ratios of 1:1, 1:2, and 2:1. The first round of operations showed removal rates of 32% to 44% for COD, 30% to 35% for TN, 32% to 36% for +4NH-N, 19% to 23% for 3NO-N-, and 12% to 22% for TP. In the second round of operations, the removal rates varied from 75% to 81% for COD, 35% to 41% for TN, 31% to 39% for +4NH-N, 30% to 34% for 3NO-N-, and 41% to 48% for TP. The average gas production rates were 6.72 L/d and 7.26 L/d for the first and second rounds of operations, respectively. The gas production rate increased in the second round of operations as a result of applied effluent recycling. The best removal efficiency was obtained for an optimum HRT of three days, a temperature of 30℃, and an effluent recycling ratio of 2:1. The results show that the removal efficiency of the AF reactor was affected by HRT, temperature, and effluent recycling.     

“尼康1”可换镜数码相机新品全球同步发布

2011年9月21日，尼康映像仪器销售（中国）有限公司在上海浦东香格里拉大酒店召开盛大发布会，全球同步推出全新“尼康1”品牌，以及旗下两款可换镜数码相机新品——J1/V1，和4支对应该系列的全新“尼康1”卡口的尼克尔镜头。     

AF溶剂以及对应的油墨树脂

随着环保要求的提高，无芳烃族溶剂的使用将逐步推广。我们应该加强对其了解。本文主要讨论无芳烃族溶剂及使用无芳烃族溶剂给油墨带来的相应变化。