F1上海站电视转播的技术设施及特点

首先简要介绍了F1赛事转播的组织机构及转播的内容组成,着重介绍了中国上海举办F1大奖赛上海站比赛时的转播设施,包括公共信号制作区、电视信号制作区及电视评论间的设备组成及特点,并总结了外国同行在进行转播时值得借鉴的经验和工作方式.     

An empirical InSAR-optical fusion approach to mapping vegetation canopy height

Exploiting synergies afforded by a host of recently available national-scale data sets derived from interferometric synthetic aperture radar (InSAR) and passive optical remote sensing, this paper describes the development of a novel empirical approach for the provision of regional- to continental-scale estimates of vegetation canopy height. Supported by data from the 2000 Shuttle Radar Topography Mission (SRTM), the National Elevation Dataset (NED), the LANDFIRE project, and the National Land Cover Database (NLCD) 2001, this paper describes a data fusion and modeling strategy for developing the first-ever high-resolution map of canopy height for the conterminous U.S. The approach was tested as part of a prototype study spanning some 62,000 km² in central Utah (NLCD mapping zone 16). A mapping strategy based on object-oriented image analysis and tree-based regression techniques is employed. Empirical model development is driven by a database of height metrics obtained from an extensive field plot network administered by the USDA Forest Service-Forest Inventory and Analysis (FIA) program. Based on data from 508 FIA field plots, an average absolute height error of 2.1 m (r = 0.88) was achieved for the prototype mapping zone.     

The antioxidant activity of teas measured by the FRAP method adapted to the FIA system: Optimising the conditions using the response surface methodology

This study proposes a FRAP assay adapted to FIA system with a merging zones configuration. The FIA system conditions were optimised with the response surface methodology using the central composite rotatable design. The optimisation parameters studied were: the carrier flow rate, the lengths of the sample and reagent loops, and reactor length. The conditions selected in accordance with the results were: carrier flow rate of 1.00 ml/min, length of the loops 18.2 cm and length of the reaction coil 210.1 cm. The detection and quantification limits were, respectively, 28.6 and 86.8 μmol/l Fe²⁺, and the precision was 1.27%. The proposed method had an analytical frequency of 30 samples/h and about 95% less volume of FRAP reagent was consumed. The FRAP assay adapted to the FIA system under the optimised conditions was utilised to determine the antioxidant activity of tea samples.     

An amperometric glucose biosensor based on a screen-printed electrode and Os-complex mediator for flow injection analysis

An amperometric Os-complex mediated glucose biosensor based on a three electrodes planar configuration was constructed using screen printing technique for flow injection analysis. The electrochemical characteristic of the amperometric biosensor was evaluated by the cyclic voltammetry in the absence and presence of Os-complex mediator. The Os-complex mediated biosensor was found to have a C–V curve close to an ideal. The applied potential of the biosensor had been explored and −0.1 V vs. Ag|AgCl reference electrode was selected for avoiding excessive interference from other electroactive species. The biosensor also indicated good stability of more than 90% of its original activity for about 14 months stored at 4 °C. The biosensor on the detection of glucose showed a linear response range of 0.5–30 mM and the correlation coefficient up to 0.99 together with a FIA system. The coefficient of variation was 3.3% for injections with a single biosensor (n = 12). The results show that the biosensor has fast response, good sensitivity and reproducibility for flow injection analysis.     

新型微流通池pH－ISFET集成传感器

设计与制备了带Ｔｉ／Ａｕ膜参考电极的长臂式ｐＨ－ＩＳＦＥＴ集成传感器与微流通池。在静态和流动分析系统测量中表明：由蠕动泵驱动的待测液流动极畅，且试样量极少，响应速度快。     

Assessing sustainable forest biomass potential and bioenergy implications for the northern Lake States region,USA

Forestlands in the United States have tremendous potential for providing feedstocks necessary to meet emerging renewable energy standards. The Lake States region is one area recognized for its high potential of supplying forest-derived biomass; however, the long-term availability of roundwood harvests and associated residues from this region has not been fully explored. Better distribution and temporal availability estimates are needed to formulate emerging state policies regarding renewable energy development. We used a novel predictive methodology to quantify sustainable biomass availability and likely harvest levels over a 100-year period in the Lake States region. USDA Forest Inventory and Analysis estimates of timberland were combined with published growth and yield models, and historic harvest data using the Forest Age Class Change Simulator (FACCS) to generate availability estimates. Monte-Carlo simulation was used to develop probability distributions of biomass harvests and to incorporate the uncertainty of future harvest levels. Our results indicate that 11.27–15.71 Mt y⁻¹ dry roundwood could be sustainably harvested from the Lake States. Assuming 65% collection rate, 1.87–2.62 Mt y⁻¹ residue could be removed, which if substituted for coal would generate 2.12–2.99 GW h of electricity on equivalent energy basis while reducing GHG (CO₂e) emission by 1.91–2.69 Mt annually. In addition to promoting energy security and reducing GHG emissions, forest residues for energy may create additional revenues and employment opportunities in a region historically dependent on forest-based industries.     

复合流动分析法测定环境水样中的总磷

应用FSIV型流动分析仪,采用在线紫外／过硫酸盐消解、复合流动分析法对环境水样中的总磷进行测定。通过试验,确定了最佳测定条件,对方法的灵敏度、准确度和精密度进行了测试,测定的方法检出限为0．006mg／L,相对标准偏差（P,3D）为1．2％～6．5％,回收率为9;3．5％～107％。该方法测定结果与标准法测定结果无显著性差异,可以用于测定环境水样中的总磷。     

缓冲溶液法用于流动注射分析中电势检测的研究──1．络合物体系

利用缓冲体系的平衡移动,结合不同的电极进行电势法检测,可间接测定样品中各种离子甚至中性分子的浓度。文中对用络合物缓冲溶液的电势检测进行了简单的理论推导,并选用几种有代表性的体系结合流动注射分析（ＦＩＡ）检测系统观察了测定灵敏度和线性范围与缓冲溶液组成的关系,建立了相应的测定方法。研究结果展示了这一测量原理用于不同类型物质ＦＩＡ检测及自动连续分析的普遍适用性和良好前景。     

流动注射在线液-液萃取火焰原子吸收法测定岩石矿物中的金

采用流动注射在线分离富集技术与原子光谱分析法相结合,建立了液-液在线萃取原子吸收光谱测定金的方法,确定了流路参数和操作程序,该法简单、快速、准确,测定的精密度为1.23％,检出限(3σ)为0.018×10~(-6)。