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An Early Warning System for curved Road Based on OV7670 Image Acquisition and STM32

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computers, Materials & continua 2019年第4期59卷 135-147页

作者： Xiaoliang Wang Wenhua Song Bowei Zhang Brandon Mausler frank Jiang School of computer science and engineering Hunan University of Science and TechnologyXiangtan411201China cisco Systems Incorporated San Jose 95134CaliforniaUSA School of IT Deakin UniversityVictoria 3216Australia

Nowadays,the number of vehicles in china has increased *** increase of the number of vehicles has also led to the increasingly complex traffic situation and the urgent safety measures in ***,the existing early warning devices such as geomagnetic,ultrasonic and infrared detection have some shortcomings like difficult installation and *** addition,geomagnetic detection will damage the road surface,while ultrasonic and infrared detection will be greatly affected by the *** the shortcomings of the existing solutions,this paper puts forward a solution of early warning for vehicle turning meeting based on image acquisition and *** solution combines image acquisition and processing technology,which uses image sensor to perceive traffic condition and image data analysis algorithm to process perceived image,and then utilize LED display screen to issue an early warning.

关键词： curve traffic turning meeting early warning image identification vehicle detection

Effect of phosphogypsum and dicyandiamide as additives on NH_3,N_2O and cH_4 emissions during composting

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Journal of Environmental Sciences 2013年第7期25卷 1338-1345页

作者： Yiming Luo Guoxue Li Wenhai Luo frank Schuchardt Tao Jiang Degang Xu college of Resource and Environmental Science China Agricultural University Institute of Agricultural Technology and Biosystems Engineering Johann Heinrich von Thuenen-Institute college of chemistry Leshan Normal University Research Institute of Safety and Environment Technology CNPC

A laboratory scale experiment of composting in a forced aeration system using pig manure with cornstalks was carried out to investigate the effects of both phosphogypsum and dicyandiamide （DcD, c2 H4 N4 ） as additives on gaseous emissions and compost quality. Besides a control, there were three amended treatments with different amounts of additives. The results indicated that the phosphogypsum addition at the rate of 10% of mixture dry weight decreased NH3 and cH4 emissions significantly during composting. The addition of DcD at the rate of 0.2% of mixture dry weight together with 10% of phosphogypsum further reduced the N20 emission by affecting the nitrification process. Reducing the phosphogypsum addition to 5% in the presence of 0.2% DcD moderately increased the NH3 emissions but not N20 emission. The additives increased the ammonium content and electrical conductivity significantly in the final compost. No adverse effect on organic matter degradation or the germination index of the compost was found in the amended treatments. It was recommended that phosphogypsum and DcD could be used in composting for the purpose of reducing NH3 , cH4 and N20 emissions.0ptimal conditions and dose of DcD additive during composting should be determined with different materials and composting systems in further study.

关键词： composting phosphogypsum dicyandiamide greenhouse gas pig manure

Growth of the tropical Pinus kesiya as influenced by climate and nutrient availability along an elevational gradient

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Journal of Plant Ecology 2020年第1期13卷 97-106页

作者： Le Tuan Ho Raimund Schneider frank M.Thomas Department of Geobotany University of TrierFaculty of Regional and Environmental SciencesBehringstraße 2154296 TrierGermany Department of Forest Resources Management Faculty of ForestryNong Lam University HCMCThu Duc DistrictHo Chi Minh CityVietnam Department of Soil Science University of TrierFaculty of Regional and Environmental SciencesBehringstraße 2154296 TrierGermany

Aims In contrast to temperate regions,the reasons for growth reductions of individual tree species along elevational gradients in tropical mountain ranges are poorly known,especially for tropical *** aimed at testing whether climatic or edaphic conditions are responsible for the reduced growth of Pinus kesiya,a widely distributed pine species of southern and south-eastern Asia,at higher *** We analysed the stem diameter increment and the isotope discrimination against ^(13)c(△^(13)c)in tree rings of *** along an elevational gradient of~900 to~2000 m *** the mountain ranges of South-central Vietnam,and related growth to△^(13)c and to climatic and edaphic *** findings We found no consistent correlation patterns between the basal area increment(BAI)of the trees and temperature or *** contrast,across the elevational gradient,we obtained significantly negative correlations of BAI with△^(13)c and with the c/N ratios and theδ^(15)N signature of the upper mineral *** was positively correlated with the concentrations of plant-available phosphorus(P_(a))and of“base”cations(calcium,magnesium,potassium)in the *** conclude that lower temperatures at higher elevations exert an indirect effect on tree growth by inducing higher c/N ratios and by reducing the rate of nitrogen(N)and P mineralization,which may be further hampered by lower concentrations of“base”cations(upon enhanced leaching by precipitation)and a negative feedback from low availability of mineralized N and P at higher *** results may be transferable to the uppermost growth limit of *** and to other montane regions of the species’occurrence.

关键词： dendroecology pine pointer year soil nutrient stable isotope

GeForce 7600GS/7300 GT强力冲击主流市场

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微型计算机 2006年第19期26卷 110-111页

作者：孤影 frank．c．

GeForce 7600 GS/7300 GT作为主流市场最具冲击力的产品．在与自家产品冲突并强力蚕食对手市场的同时．在市场上又会有怎样的走势呢？

关键词： GeForce 7600GS 显卡 GT 冲击力显示芯片

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暑期超值装机配置推荐

微型计算机 2008年第19期28卷 123-124页

作者：扬帆 frank.c.

尽管只有少数发烧玩家才会考虑。但我们依然推出了万元级配置，原因很简单：这样的配置往往能够代表某一时期的配件发展趋势；英特尔45nm处理器已经大量供货．core2DuoE8200是其中性能较强的一款，因此受到玩家的广泛关注。至于主板，... 详细信息

尽管只有少数发烧玩家才会考虑。但我们依然推出了万元级配置，原因很简单：这样的配置往往能够代表某一时期的配件发展趋势；英特尔45nm处理器已经大量供货．core2DuoE8200是其中性能较强的一款，因此受到玩家的广泛关注。至于主板，考惑到P45的供货及价格问题，我们暂时选择的是比较成熟的一线P35主板，大家也可以根据本地P45主板的铺货情况进行更换。

关键词：装机配置暑期发展趋势价格问题处理器英特尔主板 P35