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Spatial heterogeneity in a deep artificial lake plankton community revealed by PCR-DGGE fingerprinting 被引量:8
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作者 李强 赵越 +4 位作者 张旭 魏雨泉 邱琳琳 魏自民 李富恒 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2015年第3期624-635,共12页
To explore the spatial heterogeneity of plankton communities in a deep artificial lake (Songhua Lake, China), samples were collected at seven sites. Samples were investigated by denaturing gradient gel electrophores... To explore the spatial heterogeneity of plankton communities in a deep artificial lake (Songhua Lake, China), samples were collected at seven sites. Samples were investigated by denaturing gradient gel electrophoresis (DGGE) analysis of the PCR-amplified 16S and 18S rRNA genes and specific bands were sequenced. Cluster analysis of the DGGE profiles revealed that all of the samples grouped into two distinct clusters, in accordance with sampling site; while in each cluster, the divergence of sub-clusters correlated with sampling depth. Sequence analysis of selected dominant DGGE bands revealed that most sequenced phylotypes (84%) exhibited 〉97% similarity to the closest sequences in GenBank, and were affiliated with ten common freshwater plankton phyla (Proteobacteria, Actinobacteria, Bacteroidetes, Cyanobacteria, Bacillariophyta, Pyrrophyta, Cryptophyta, Ciliophora, Stramenopiles, and Rotifera). Several of these groups are also found worldwide, indicating the cosmopolitan distribution of the phylotypes. The relationships between DGGE patterns and environmental factors were analyzed by redundancy analysis (RDA). The results suggested that, total nitrogen, nitrate, nitrite, temperature were strongly correlated with the variation ammonia, and CODMn concentrations, and water in plankton composition. 展开更多
关键词 Songhua Lake plankton community composition denaturing gradient gel electrophorcsis (DGGE) artificial lake redundancy analysis
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论村上春树小说创作中的“浪漫美学” 被引量:1
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作者 李晓娜 《求索》 CSSCI 2012年第10期124-126,共3页
村上春树的文学创作与浪漫美学传统之间,存在着紧密而复杂的关系。他在作品中抒发强烈的个人主观感受,强调创作的自由性,感悟人类生存的精神困境,描写爱欲与死亡的心灵挣扎。村上塑造了具有的魔幻直观性、神秘性、超验性的"异质人... 村上春树的文学创作与浪漫美学传统之间,存在着紧密而复杂的关系。他在作品中抒发强烈的个人主观感受,强调创作的自由性,感悟人类生存的精神困境,描写爱欲与死亡的心灵挣扎。村上塑造了具有的魔幻直观性、神秘性、超验性的"异质人物",体现出浪漫美学想象力的敏锐、怪诞和神奇,表现出都市文明中生活的现代人对自然的渴望和对自由的向往。 展开更多
关键词 村上春树 浪漫美学 异质人物 自然诉求
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Finding misplaced items using a mobile robot in a smart home environment
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作者 Qi WANG Zhen FAN +2 位作者 Wei-hua SHENG Sen-lin ZHANG Mei-qin LIU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2019年第8期1036-1049,共14页
Smart homes can provide complementary information to assist home service robots.We present a robotic misplaced item finding(MIF)system,which uses human historical trajectory data obtained in a smart home environment.F... Smart homes can provide complementary information to assist home service robots.We present a robotic misplaced item finding(MIF)system,which uses human historical trajectory data obtained in a smart home environment.First,a multi-sensor fusion method is developed to localize and track a resident.Second,a path-planning method is developed to generate the robot movement plan,which considers the knowledge of the human historical trajectory.Third,a real-time object detector based on a convolutional neural network is applied to detect the misplaced item.We present MIF experiments in a smart home testbed and the experimental results verify the accuracy and efficiency of our solution. 展开更多
关键词 Home service robot Smart home Heterogeneous sensors Autonomous robot retrieval
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