Visible light localization algorithm based on multi-measurements constraints

In the indoor visible light transmission environment with complex noise, traditional received signal strength indication(RSSI)localization algorithm and imaging localization algorithm are unable to accurately determine the reason of the inaccurate localization model and inadequate constraints of position coordinates. In order to solve the problems, a visible light localization algorithm based on multi-measurements constraints is presented in the paper. The algorithm first constructs a joint localization state space model based on RSSI localization and the imaging localization algorithm. Then, states, measurements and their equations are constructed based on the space model. Finally, the equations are resolved using the unscented Kalman filter(UKF). Compared with RSSI localization and imaging localization, simulation results show that the RMSE of the proposed algorithm could be closer to the Cramer Rao bound. Besides, the localization probability of the proposed algorithm is higher than that of RSSI localization and imaging localization algorithm.     

压榨橡胶辊的损坏现象及应对措施

介绍了纸机压榨胶辊的常见损坏现象,分析其损坏原因,提出了应对措施。     

The Installation and Use of a Snow Pillow to Monitor Snow Water Equivalent

In February 1993, a snow pillow was installed at Widdibank Fell near Cow Green reservoir (in Upper Teesdale) to monitor snow water equivalent.
This paper describes existing snow-measurement techniques in the UK and the site-selection process and installation details for the snow pillow. Following a winter of more than 100 days with snow cover at the site, the success of the pillow in representing site and catchment snow conditions and in providing operationally useful snowmelt information for flood warning has been assessed.     

Changes in the Distribution of Annual Rainfall in the British Isles

The spatial distribution of annual rainfall in the British Isles is analysed from 1881 to 1990 with reference to changes in the frequency of airflow types. The influence of more frequent westerly airflows earlier this century is evident in higher rainfall in western areas. Changes from 1941 to 1970 show no evidence of a reversal of this change despite a reduction in the dominance of westerlies. Evidence for an abrupt return to a more vigorous westerly circulation since the mid-1970s, and associated wetness in north-west Britain, is found to have parallels with scenarios of future climates produced by recent climate models caused by a strengthening of the temperature gradients which drive the mid-latitude westerly circulation.     

利用灰色理论综合评价成岩储集相的方法

根据成岩储集相定量评价分析方法和准则，利用灰色理论思维和手段，匹配、拟合和提取储层物性参数，分别以评价参数对成岩作用的综合效应进行分析，建立起灰色理论成岩储集相综合评价参数指标和自动分析处理方法，实现了灰色系统理论集成和多种信息综合，为油藏描述、储层非均质性研究、油井产能分析和含油有利区块筛选提供了重要方法和依据。     

Physicochemical,mineral and sensory properties of set‐type yoghurts produced by addition of grape,mulberry and carob molasses (Pekmez) at different ratios

This study investigated the effects of adding grape, mulberry and carob molasses (Pekmez) at 6%, 10% or 14% on titratable acidity, pH, viscosity, whey separation, water holding capacity (WHC), gel firmness, acetaldehyde, volatile fatty acids, colour values, mineral profile and sensory properties of set‐type yoghurts. Increasing concentration of the molasses decreased whiteness value, viscosity and WHC, but increased redness/greenness and yellowness/blueness values, whey separation and mineral contents of the samples significantly (P < 0.05). Nevertheless, the yoghurts produced by adding grape molasses had the highest points in the sensory evaluation, followed by mulberry and carob molasses.     

抗红外烟幕中固体消光材料的研究进展

开发高效环保型抗红外烟幕已引起了国内外广泛关注,为此,世界各国积极致力于发展低毒固体红外消光材料,现已报道的有金属类、新型碳材料类和抗红外复合材料。本文介绍了固态气溶胶粒子红外消光特性的研究现状,综述了上述三类材料的研究进展,指出了气溶胶粒子的消光特性仿真研究、纳米新型碳材料和金属薄膜复合材料仍是未来重点研究的方向。建议积极关注和探索纳米红外吸波材料、单向吸波材料和金属化生物体红外吸波材料,这些材料有望成为新一代的抗红外烟幕消光材料。附参考文献63篇。     

掺用缓凝剂混凝土结构的施工安全

从掺用缓凝剂及施工力学角度分析,导致某工程质量事故的主要原因是缓凝剂超掺量和支护方案选择不当.基于掺缓凝剂混凝土结构施工安全的探讨,建议在设定模板及其支撑层数、施工周期等参数后,应将施工层高度、相应的环境温度及风速、浇筑混凝土时的预期强度、混凝土拆模强度等因素,纳入试验确定缓凝剂掺量的约束条件,实行动态控制缓凝剂掺量,以达到掺缓凝剂混凝土结构的施工安全.     

在建水电工程安全文化示范企业创建的实践

澜沧江公司在建施工工程较多,由于人的违章行为导致的物的不安全状态,如违章摆放的施工用具或设备、未经许可的擅自作业行为、未采取保护措施的作业行为等也是客观存在的,随着经济的发展,设备的本质安全水平不断提升,作业环境也逐步得到改善。但是,水电施工的安全风险仍无处不在,居高不下,设备的本质安全和作业环境的改善只能解决一部分问题,最终归结点仍在人的不安全行为上。因此,安全文化的推行是水电建设安全管理上台阶的最重要手段,也是实现本质安全的根本方法。