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181 results on '"Zhou Chun-Lin"'

1. Communities of soil macrofauna in green spaces of an urbanizing city at east China Comunidades de macrofauna del suelo en espacios verdes de una ciudad en proceso de urbanización en el este de China

Author

GE BAO-MING, LI ZHEN-XING, ZHANG DAI-ZHEN, ZHANG HUA-BIN, LIU ZONG-TANG, ZHOU CHUN-LIN, and TANG BO-PING

Subjects
capa del suelo, China, ciudad de Yancheng, diversidad, urbanización, diversity, soil layer, urbanization, Yancheng City, Zoology, QL1-991, Botany, QK1-989
Abstract

We evaluated the diversity of soil macrofauna communities inhabiting urban green spaces in Yancheng City, an urbanizing city located east of China. In the end of April 2011, the taxonomic richness, abundance and composition of soil macrofauna communities were assessed and compared among five types of green space (poplar forest, rapeseed farm, grassland in park, lawn and nursery garden) and three depth layers in the soil, with taxonomic resolution attained at the order level. Taxonomic richness (orders) and abundance were significantly different among green spaces. Diversity indices (Margalef's taxonomic richness R and Shannon-Weaver diversity index H') were higher in poplar forest, grassland in park and nursery garden than in rapeseed farm and lawn. Taxonomic richness (Chao 2) showed a similar trend. There were significant effects of green space type and soil layer, which showed a significant interaction affecting macrofauna composition. We recommend that urban green spaces can be used for maintaining biodiversity, not only for landscape purposes.Evaluamos la diversidad de las comunidades de macrofauna del suelo que habitan los espacios verdes urbanos en la ciudad de Yancheng, una ciudad en proceso de urbanización situada al este de China. A fines de abril 2011, la riqueza taxonómica, abundancia y composición de comunidades de macrofauna del suelo fueron evaluadas y comparadas entre cinco tipos de espacio verde (bosque de álamos, granja de colza, pastizal de parque, césped y jardín vivero) y tres capas de profundidad del suelo, con resolución taxonómica a nivel de orden. La riqueza taxonómica (de órdenes) y la abundancia fueron significativamente diferentes entre los espacios verdes. Los indices de diversidad (riqueza taxonómica R de Margalef y diversidad H' de Shannon-Weaver) fueron mayores en el bosque de álamos, pastizal de parque y jardin vivero que en la granja de la colza y el césped. La riqueza taxonómica (Chao 2) mostró una tendencia similar. Hubo efectos significativos del tipo de espacio verde y capa del suelo, los cuales mostraron una interacción significativa afectando la composición de la macrofauna. Recomendamos que los espacios verdes urbanos se puedan utilizar para mantener la biodiversidad, y no solo con propósitos de paisaje.

Published
2012

7. The complete mitochondrial genome of Plodia interpunctella (Lepidoptera: Pyralidae) and comparison with other Pyraloidea insects

Author

Liu, Qiu-Ning, Chai, Xin-Yue, Bian, Dan-Dan, Zhou, Chun-Lin, and Tang, Bo-Ping

Subjects
RNA sequencing -- Comparative analysis, Biological sciences
Abstract

The mitochondrial (mt) genome can provide important information for the understanding of phylogenetic relationships. The complete mt genome of Plodia interpunctella (Lepidoptera: Pyralidae) has been sequenced. The circular genome is 15 287 bp in size, encoding 13 protein-coding genes (PCGs), 2 rRNA genes, 22 tRNA genes, and a control region. The AT skew of this mt genome is slightly negative, and the nucleotide composition is biased toward A+T nucleotides (80.15%). All PCGs start with the typical ATN (ATA, ATC, ATG, and ATT) codons, except for the coxl gene which may start with the CGA codon. Four of the 13 PCGs harbor the incomplete termination codon T or TA. All the tRNA genes are folded into the typical clover-leaf structure of mitochondrial tRNA, except for trnSl (AGN) in which the DHU arm fails to form a stable stem-loop structure. The overlapping sequences are 35 bp in total and are found in seven different locations. A total of 240 bp of intergenic spacers are scattered in 16 regions. The control region of the mt genome is 327 bp in length and consisted of several features common to the sequenced lepidopteran insects. Phylogenetic analysis based on 13 PCGs using the Maximum Likelihood method shows that the placement of P. interpunctella was within the Pyralidae. Keywords: mitochondrial genome, Pyralidae, Plodia interpunctella, phylogeny. Le genome mitochondrial (mt) peut fournir des informations qui sont importantes pour la comprehension des relations phylogenetiques. Le genome mt complet du Plodia interpunctella (Lepidoptera : Pyralidae) a ete sequence. Ce genome circulaire compte 15 287 pb, 13 genes codant pour des proteines (PCG), 2 genes codant pour des ARNr, 22 genes codant pour des ARNt et une region de controle. Le biais A/T chez ce genome mt est legerement negatif et la composition nucleotidique est egalement biaisee en faveur des nucleotides A+T (80,15 %). Tous les PCG commencent avec le codon typique ATN (ATA, ATC, ATG, and ATT), a l'exception du gene coxl qui pourrait debuter avec le codon CGA. Quatre de 13 PCG utilisent un codon de terminaison incomplet (T ou TA). Tous les ARNt se replient pour former la structure en trefle typique des ARNt mitochondriaux, a l'exception de trnS1 (AGN) dont le bras DHU ne forme pas une structure en epingle stable. Les sequences chevauchantes englobent 35 pb au total et sont presentes dans sept regions. Les espaceurs intergeniques totalisent 240 pb et sont disperses parmi 16 regions. La region de controle du genome mt mesure 327 pb et comprend plusieurs des caracteristiques rencontrees chez les lepidopteres sequences. Une analyse phylogenetique realisee par la methode de vraisemblance maximale a l'aide des 13 PCG a montre que le P. interpunctella logeait au sein des Pyralidae. [Traduit par la Redaction] Mots-cles : genome mitochondrial, Pyralidae, Plodia interpunctella, phylogenie., Introduction Insect mitochondrial (mt) genome is a circular molecule that is 14-19 kb in length and contains 22 transfer RNA (tRNA) genes, 13 protein coding genes (PCGs), 2 ribosomal RNA [...]

Published
2016
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16. Particle gap repair method and effect actors analysis

Author

魏平玉 Wei Ping-yu, 王贺卫 Wang He-wei, 衣洪亮 Yi Hong-liang, 韩磊 Han Lei, 郭栋 Guo Dong, and 周春霖 Zhou Chun-lin

Subjects
Materials science, Signal Processing, Particle, Nanotechnology, Repair method, Instrumentation, Electronic, Optical and Magnetic Materials
Published
2017

17. Comparative mitochondrial genome analysis of Grammodes geometrica and other noctuid insects reveals conserved mitochondrial genome organization and phylogeny

Author

Huang, Yan, primary, Liu, Yu, additional, Zhu, Xiao-Yu, additional, Xin, Zhao-Zhe, additional, Zhang, Hua-Bin, additional, Zhang, Dai-Zhen, additional, Wang, Jia-Lian, additional, Tang, Bo-Ping, additional, Zhou, Chun-Lin, additional, Liu, Qiu-Ning, additional, and Dai, Li-Shang, additional

Published
2019
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18. Transcriptome analysis of differential expressed genes in hepatopancreas of Procambarus clarkii challenged with peptidoglycan

Author

Chu, Xiao-Hua, primary, Yang, Ting-Ting, additional, Liu, Yu, additional, Hong, Liang, additional, Jiao, Ting, additional, Meng, Xun, additional, Zhang, Dai-Zhen, additional, Wang, Jia-Lian, additional, Tang, Bo-Ping, additional, Zhou, Chun-Lin, additional, Liu, Qiu-Ning, additional, Zhang, Wei-Wei, additional, and He, Wen-Fei, additional

Published
2019
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20. A myeloid differentiation factor 88 gene from yellow catfish Pelteobagrus fulvidraco and its molecular characterization in response to polyriboinosinic polyribocytidylic acid and lipopolysaccharide challenge

Author

Zhao, Xiao-Ming, primary, Chu, Xiao-Hua, additional, Liu, Yu, additional, Liu, Qiu-Ning, additional, Jiang, Sen-Hao, additional, Zhang, Dai-Zhen, additional, Tang, Bo-Ping, additional, Zhou, Chun-Lin, additional, and Dai, Li-Shang, additional

Published
2018
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22. The complete mitochondrial genome of Clostera anastomosis (Lepidoptera: Notodontidae) and implication for the phylogenetic relationships of Noctuoidea species

Author

Zhu, Xiao-Yu, primary, Xin, Zhao-Zhe, additional, Liu, Yu, additional, Wang, Ying, additional, Huang, Yan, additional, Yang, Zhi-Hui, additional, Chu, Xiao-Hua, additional, Zhang, Dai-Zhen, additional, Zhang, Hua-Bin, additional, Zhou, Chun-Lin, additional, Wang, Jia-Lian, additional, Tang, Bo-Ping, additional, and Liu, Qiu-Ning, additional

Published
2018
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30. Transmission of electrons through the conical glass capillary with the grounded conducting outer surface

Author

Qian, Li-Bing, Li, Peng-Fei, Jin, Bo, Jin, Ding-Kun, Song, Guang-Yin, Zhang, Qi, Wei, Long, Niu, Ben, Wan, Cheng-Liang, Zhou, Chun-Lin, Mueller, Arnold Milenko, Dobeli, Max, Song, Zhang-Yong, Yang, Zhi-Hu, Schuch, Reinhold, Zhang, Hong-Qiang, Chen, Xi-Meng, Qian, Li-Bing, Li, Peng-Fei, Jin, Bo, Jin, Ding-Kun, Song, Guang-Yin, Zhang, Qi, Wei, Long, Niu, Ben, Wan, Cheng-Liang, Zhou, Chun-Lin, Mueller, Arnold Milenko, Dobeli, Max, Song, Zhang-Yong, Yang, Zhi-Hu, Schuch, Reinhold, Zhang, Hong-Qiang, and Chen, Xi-Meng

Abstract

The transmission of 1.5 keV-electrons through a conical glass capillary is reported. This study aims to understand the so-called guiding effect for the negatively charged particles (e.g. electrons). The guiding mechanism is understood quite well with positively charged particles in particular highly charged ions, but not clear with electrons, i. e., even the basic scheme mediated by the existence of negative charge patches to guide the electrons is still somewhat controversial.. The study of the charging-up dynamics causing the electrons transport inside the capillary will shed light on this issue. In order to perform this, a data acquisition system has been setup to follow the time evolution of the two-dimensional angular distribution of the transmitted electrons. The electrons are detected by the multi-channel plate (MCP) detector with a phosphor screen. The image from the phosphor screen is recorded by a charge-coupled device camera. The timing signals for the detected events are extracted from the back stack of the MCP detector and recorded by the data acquisition system, synchronized with the acquired images. The electron beam has a size of 0.5 mm x 0.5 mm and a divergence of less than 0.35.. The inner diameter of the straight part of the capillary is 1.2 mm and the exit diameter is 225 mu m. A small conducting aperture of 0.3 mm in diameter is placed at the entrance of the capillary. Two-dimensional angular distribution of the transmitted electrons through conical glass capillary and its time evolution are measured. The results show that the transmission rate decreases and reaches to a constant value for the completely discharged glass capillary with time going by. The centroid of the angular distribution moves to an asymptotic value while the width remains unchanged. These transmission characteristics are different from those indicated in our previous work (2016 Acta Phys: Si n: 65 204103). The difference originates from the different manipulations of the cap

Published
2017
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31. The direct ionization processes in the collisions of partially stripped carbon and oxygen ions with helium atoms at low-to-intermediate energies

Author

Chen Xi-Meng, Zou Xian-Rong, Sun Guang-Zhi, Shao Jian-Xiong, and Zhou Chun-Lin

Subjects
Physics, Projectile, General Physics and Astronomy, chemistry.chemical_element, Molar ionization energies of the elements, Effective nuclear charge, Ion, chemistry, Ionization, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, Atomic physics, Ionization energy, Carbon, Helium
Abstract

The values of direct double-to-single ionization ratio R of helium atoms induced by Cq+, Oq++ (q = 1–4) ions at incident energies from 0.2 to 8.5MeV are measured. Based on the existing model (Shao J X, Chen X M and Ding B W 2007 Phys. Rev. A 75 012701) the effective charge of the projectile is introduced to theoretically estimate the value of R for the partially stripped ions impacting on helium atoms. The results calculated from our 'effective charge' model are in good agreement with the experimental data, and the dependence of the effective charge on the ionization energy of the projectile is also discussed qualitatively.

Published
2008

40. Transmission of electrons through the conical glass capillary with the grounded conducting outer surface

Author

Zhou Chun-Lin, Max Döbeli, Jin Bo, Jin Ding-Kun, Li Peng-Fei, Wan Cheng-Liang, Niu Ben, Zhang Hong-Qiang, Chen Xi-Meng, Zhang Qi, Yang Zhi-Hu, Song Zhang-Yong, Wei Long, Reinhold Schuch, Song Guang-Yin, Qian Li-Bing, and Arnold Milenko Müller

Subjects
Materials science, business.industry, Capillary action, Aperture, General Physics and Astronomy, Conical surface, Electron, 01 natural sciences, Charged particle, 010305 fluids & plasmas, Ion, Optics, 0103 physical sciences, Cathode ray, 010306 general physics, business, Beam divergence
Abstract

The transmission of 1.5 keV-electrons through a conical glass capillary is reported. This study aims to understand the so-called guiding effect for the negatively charged particles (e.g. electrons). The guiding mechanism is understood quite well with positively charged particles in particular highly charged ions, but not clear with electrons, i.e., even the basic scheme mediated by the existence of negative charge patches to guide the electrons is still somewhat controversial. The study of the charging-up dynamics causing the electrons transport inside the capillary will shed light on this issue. In order to perform this, a data acquisition system has been setup to follow the time evolution of the twodimensional angular distribution of the transmitted electrons. The electrons are detected by the multi-channel plate (MCP) detector with a phosphor screen. The image from the phosphor screen is recorded by a charge-coupled device camera. The timing signals for the detected events are extracted from the back stack of the MCP detector and recorded by the data acquisition system, synchronized with the acquired images. The electron beam has a size of 0.5 mm0.5 mm and a divergence of less than 0.35. The inner diameter of the straight part of the capillary is 1.2 mm and the exit diameter is 225 m. A small conducting aperture of 0.3 mm in diameter is placed at the entrance of the capillary. Two-dimensional angular distribution of the transmitted electrons through conical glass capillary and its time evolution are measured. The results show that the transmission rate decreases and reaches to a constant value for the completely discharged glass capillary with time going by. The centroid of the angular distribution moves to an asymptotic value while the width remains unchanged. These transmission characteristics are different from those indicated in our previous work (2016 Acta Phys. Sin. 65 204103). The difference originates from the different manipulations of the capillary outer surface. A conducting layer is coated on the outer surface of the capillary and grounded in this work. This isolates various discharge/charge channels and forms a new stable discharge channel. The transmission rate as a function of the tilt angle shows that the allowed transmission occurs at the tilt angle limited by the geometrical factors, i.e., the geometrical opening angle given by the aspect ratio as well as the beam divergence. The transmission characteristics suggest that most likely there are formed no negative patches to facilitate the electron transmission through the glass capillary at this selected beam energy. It is different from that of highly charged ions, where the formation of the charge patches prohibits the close collisions between the following ions and guides them out of the capillary.

Published
2017

41. Interaction of O 3+ Ions with Al 2 O 3 Nanocapillaries

Author

Xu Jun-Kui, Lou Feng-Jun, Saho Jian-Xiong, Chen Yi-Feng, Xi Fa-Yuan, Ding Bao-Wei, Yin Yong-Zhi, Qiu Xi-Yu, Chen Xi-Meng, Cui Ying, Sun Guang-Zhi, Wang Xing-An, Zhou Chun-Lin, and Wang Jun

Subjects
Aluminium oxides, Membrane, Materials science, Nanostructure, Physics::Instrumentation and Detectors, Projectile, Detector, General Physics and Astronomy, Atomic physics, Charged particle, Beam (structure), Ion
Abstract

We investigate angular distributions of the transmitted 60 keV and 120 keV O3+ ions through nanocapillaries with 50nm diameter and 10μm length. The experimental results are in agreement with the 'guiding effect' found by Stolterfoht et al. For different tilted angles of the nanocapillary membrane with respect to the beam, the angular distributions of the transmitted ions are measured by a one-dimensional micro-channel plate (MCP) detector. Moreover, the dependence of this guiding effect on the projectile energy is studied.

Published
2008

48. Research on Channel Estimation in Multiband Ultra Wideband System Based on IML Algorithm

Author

Liang Jian-hua, Zhou Chun-lin, and Zhang Xueyi

Subjects
Multipath interference, Computer science, Orthogonal frequency-division multiplexing, Ultra-wideband, Algorithm design, Wideband, Communications system, Algorithm, Multiplexing, Multipath propagation
Abstract

The short-range electric power communication system can use UWB (Ultra - Wideband: UWB) wireless communication technology.UWB communication has the advantages of the strong anti-multipath and anti-interference ability and the high rate,particularly potential applications in short-range multiple access wireless communications. The indoor multipath channel estimation technology is mainly researching based on multiband orthogonal frequency-division multiplexing ultra wideband.We propose two UWB channel estimation algorithms with training bits-ML algorithm and IML algorithm. The simulation results show that two algorithms can efficiently estimate channel parameters,but the IML algorithm has better performance than the ML algorithm in getting rid of multipath's interference.

Published
2013

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