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Search Results: 1 - 10 of 26563 matches for " 程环环 "
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基于计算机视觉的火车钩挡识别
Train Interval Recognition Based on Computer Vision
 [PDF]

单勇, 环环
Hans Journal of Data Mining (HJDM) , 2015, DOI: 10.12677/HJDM.2015.52003
Abstract:
为了给运煤车喷洒抑尘剂,需要识别火车车厢之间的钩铛。基于计算机视觉的火车钩铛识别只需在站台一侧安装摄像头,对拍摄到的图像序列进行处理从而识别出钩铛。由于光照、天气等诸多因素的影响,首先采用直方图均衡算法对图像进行增强,然后提取图像的LBP纹理特征和直线特征,并进行特征融合,选用SVM (Support Vector Machine)分类器,针对不同的目标通过离线训练的方式获得SVM模型参数。针对四类目标训练了相应的SVM模型,分别为车头、车厢、钩挡和车站,对拍摄的运煤车视频图像可以实现在线识别。经过初步实验验证,提出的钩铛识别系统能够自动识别火车钩铛的开始和结束,从而控制喷洒系统,且安装简单,能够最大程度的减少抑尘剂浪费。
Train intervals between carriages need to be recognized when we sprinkle the dust-restrainer on coal in the train. A train interval recognition method based on computer vision technology is pro-posed, which will set a video camera on one side of the platform to recognize the train intervals by processing image sequences. Because of the variation of illumination and weather, images are first enhanced by histogram equalization algorithm, and then image features including texture features and line features are extracted and integrated. The SVM model will be trained offline for four targets, including locomotive, carriage, interval and platform, and used to recognize the train in-tervals online. Our experimentations show that our system is capable of recognizing the beginning and the ending of train intervals automatically. Furthermore, the proposed system can be embeded in the sprinkle system easily to reduce the waste of dust-restrainer dramatically.
基于虚拟设备接口技术的视频综合监控系统
Video Integrated Surveillance System Based on Technology of Virtual Device Interface
 [PDF]

单勇, 环环, 王建强
Software Engineering and Applications (SEA) , 2015, DOI: 10.12677/SEA.2015.41001
Abstract:
针对异构视频监控系统中的视频资源共享问题,本文提出了一种基于虚拟设备接口技术的视频综合监控系统的集成方案。该系统体系结构分为四层,分别为:核心服务层、虚拟设备驱动层、协议转换层和物理设备接口层。运用虚拟设备驱动一体化解决方案,通过虚拟设备驱动完成设备功能转换和通信协议转换,从而能够兼容多种视频设备,并且实现各种通信协议和视频解码算法的转换。经过初步试验验证,表明该系统能有效集成多种厂家的视频设备,实现视频资源的合理共享,具有一定的扩展性和兼容性。
It is always a challenging task to share video resources between isomerous video surveillance systems. A hierarchical system for isomerous video surveillance integration based on the technique of virtual device interface (VDI) is proposed, which is composed of sever kernel level, virtual device drive level, protocol transformation level and physical equipment interface level. By incorporating the VDI technique into our system, the proposed system is compatible with various different video equipments and capable of transformation of different communication protocols as well as the video coding algorithm. Our experimentations show that our system can integrate video devices produced by different manufacturers, thus video sources can be shared with each other effectively, which also validates the expansibility and compatibility of the proposed system.
模因论视角下中文广告语篇中的英语缩略语研究
A Brief Investigation into English Abbreviations Embedded in Chinese Ads from the Perspective of Memetics
 [PDF]

环环, 王文琴
Modern Linguistics (ML) , 2013, DOI: 10.12677/ML.2013.13022
Abstract: 英语缩略语由于顺应了人们生活中的“经济原则”而大量嵌入到汉语中,并引起了学者的研究兴趣。本文以都市类报纸中嵌入英语缩略语的中文广告语篇为语料,找出使用频率较高的英语缩略语,并对这一语言现象从模因概念、周期以及语用效应的角度探讨其成为强势模因的动因及其产生的语用功能,从一个新的角度揭示英语缩略语在汉语中存在的理据
 

English abbreviations have been largely embedded into Chinese since they apply with the “principles of economy” in life, and they are of interest to researchers. By making an investigation into the data of Chinese advertisements embedded with English abbreviations from popular newspapers and based on the theory of memetics, the present paper hopes to find out the English abbreviations frequently used in the ads, discusses how some abbreviations become powerful memes and probes into their pragmatic effects, so as to provide the rationale for the existence of English abbreviations in Chinese from a brand perspective.

丙酮丁醇梭菌发酵菊芋汁生产丁醇
陈丽杰?,勋?,邓攀?,任剑刚?,环环,白凤武?
生物工程学报 , 2010,
Abstract: 对丙酮丁醇梭菌clostridiumacetobutylicuml7发酵菊芋汁酸水解液生产丁醇进行了初步研究。实验结果表明,以该水解液为底物生产丁醇,不需要添加氮源和生长因子。当水解液初始糖浓度为48.36g/l时,其发酵性能与以果糖为碳源的对照组基本相同,发酵终点丁醇浓度为8.67g/l,丁醇、丙酮和乙醇的比例为0.58∶0.36∶0.06,但与以葡萄糖为碳源的对照组相比,发酵时间明显延长,表明该菌株葡萄糖转运能力强于果糖。当水解液初始糖浓度提高到62.87g/l时,发酵终点残糖浓度从3.09g/l增加到3.26g/l,但丁醇浓度却提高到11.21g/l,丁醇、丙酮和乙醇的比例相应为0.64∶0.29∶0.05,表明适量糖过剩有助于c.acetobutylicuml7胞内代谢从丙酮合成向丁醇合成途径调节;继续提高水解液初始糖浓度,发酵终点残糖浓度迅速升高,丁醇生产的技术经济指标受到明显影响。
正交试验法优选姜半夏炮制工艺
环环,钟凌云
中国中医药信息杂志 , 2012, DOI: 10.3969/j.issn.1005-5304.2012.10.021
Abstract: 目的筛选确定姜半夏最佳炮制工艺。方法采用l9(3)4正交试验法,以姜半夏中有机酸、生物碱和白矾残留量为考察指标,用综合加权评分法优选姜半夏炮制工艺。结果白矾用量为主要影响因素,生姜用量影响不显著,优选的炮制工艺为:每100g半夏用生姜25g,白矾12.5g,煮制5h。结论优选得到的炮制工艺简便易行,有良好的重复性和可操作性,有助于姜半夏质量控制。
Butanol production from hydrolysate of Jerusalem artichoke juice by Clostridium acetobutylicum L7
丙酮丁醇梭菌发酵菊芋汁生产丁醇

Lijie Chen,Chengxun Xin,Pan Deng,Jiangang Ren,Huanhuan Liang,Fengwu Bai,
陈丽杰
,,邓攀,任剑刚,环环,白凤武

生物工程学报 , 2010,
Abstract: Butanol production from acid hydrolysate of Jerusalem artichoke juice by Clostridium acetobutylicum L7 was investigated, and it was found that natural components of the hydrolysate were suitable for solvent production with the species. With batch fermentation using the medium containing 48.36 g/L total sugars, 8.67 g/L butanol was produced at 60 h, and the ratio of butanol to acetone to ethanol was 0.58:0.36:0.06, which were similar to the fermentation with fructose as carbon source, but both of these two fermentations were slower than that with glucose as carbon source, indicating the fructose transport of the species might not be effective as that for glucose. When the total sugars of the medium were increased to 62.87 g/L, the residual sugars increased slightly from 3.09 g/L to 3.26 g/L, but butanol production of the fermentation system was improved significantly, with 11.21 g/L butanol produced and the ratio of butanol to acetone to ethanol at 0.64:0.29:0.05, which illustrated that an excess in sugars enhanced the butanol biosynthesis of the species by compromising its acetone production. When the sugar concentration of the medium was further increased, much more sugars were remained unconsumed, making the process economically unfavourable.
几种鸡肌肉中肌苷酸(imp)的测定
宋焕禄,张建,环环
食品科学 , 2002,
Abstract: ?用反相-高效液相色谱法(rp-hplc)对几种鸡肌肉中的肌苷酸(imp)含量进行了测定。结果表明:固始鸡几个鸡种肌肉中的肌苷酸含量比a-a鸡(市售西装鸡)来得高,尤其是胸肉:1年生固始鸡母鸡的含量(干重)是a-a鸡的2倍还多,130日龄固始鸡母鸡的含量约为a-a鸡的2倍,90日龄固始鸡公鸡的比a-a鸡高50%;中华宫廷黄鸡肌肉中的肌苷酸含量也比a-a鸡高很多。
hplc法快速分析葛根中的葛根素和大豆甙
陈斌,环环,严衍禄
食品科学 , 2001,
Abstract: ?采用70%的乙醇浸提葛根粉末经微波辐射间歇处理2min,可完成葛根总黄酮的提取,然后采用反向hplc法测定了6个不同种类葛根和葛藤中葛根素、大豆甙的含量。葛根素检测线性范围为0.115~1.38μg/ml,r=0.9991,平均回收率为103.31%,变异系数为1.37%;大豆甙检测线性范围为0.12~1.44μg/ml,r=0.9998,平均回收率为98.73%,变异系数为2.43%。实验证明本方法快速、简便、重现性好
cucr2o4/石墨烯复合粒子的制备及其对ap的催化作用
环环,姜 炜?,郝嘎子?
推进技术 , 2015,
Abstract: 以石墨烯为载体,采用两步法制备了cucr2o4/石墨烯复合粒子,通过x射线衍射仪(xrd)、透射电子显微镜(tem)对样品的结构及形貌进行了表征,并采用差示扫描量热仪(dsc)分别研究了cucr2o4、cucr2o4/石墨烯、石墨烯及cucr2o4和石墨烯的混合物对ap的催化效果。结果表明,cucr2o4纳米粒子较均匀地分布在石墨烯上,cucr2o4/石墨烯复合粒子使ap高温分解峰温度降至382℃,降低了60℃,表观分解热增加了351j/g,达1188j/g,其催化效果明显优于cucr2o4、石墨烯及cucr2o4和石墨烯的混合物。
生物滴滤塔净化含低浓度苯乙烯废气的研究
任爱玲,环环,郭斌,秦慧娟,符凤英
环境科学学报 , 2013,
Abstract: 利用菌丝体热解炭作为填料,采用两座相同实验室规模的生物滴滤塔,分别填装热解炭-木屑混合填料和木屑单一填料,并联操作,进行微生物净化含苯乙烯废气的实验,研究并对比了两座生物滴滤塔的净化性能.结果表明,由于热解炭具有比表面积大、孔隙率高等特点,热解炭-木屑混合作为生物滴滤塔填料,比单一的木屑填料挂膜速度快,净化效果好,停运恢复能力强.适宜操作条件为:入口气体浓度50~450mg·m-3,停留时间21.6~43.2s,气液比110.7~55.3,净化效率92%~100%,最大去除负荷可达153.1g·m-3·h-1.整个实验过程中,系统的压降始终维持在0~255Pa,动力消耗小.研究发现,循环液中氨氮(NH4+-N)浓度只需能够保证微生物正常的生命活动即可,不宜过量或不足.生物滴滤塔循环液的紫外吸光度(UV254)与苯乙烯去除率具有一定的相关性,可通过测定循环液UV254,了解生物滴滤塔的运行状况.
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