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Search Results: 1 - 10 of 23601 matches for " Wenjun Liang "
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Hierarchicalization of chaotic food webs using Interpretive Structural Modeling
Ping Liang,WenJun Zhang
Network Biology , 2013,
Abstract: Ecologists always meet complex food webs without clear hierarchical structure. At certain degree it will retard further analysis of food webs. In present study we transferred chaotic food webs into hierarchicalized food webs using Interpretive Structural Modeling (ISM). As an example, the hierarchical structure of seven food webs was clearly identified and defined using ISM. ISM was thus proven to be effective.
Impact of Environmental Factors on the Photosynthesis and Respiration of Young Seedlings of Sargassum thunbergii (Sargassaceae, Phaeophyta)  [PDF]
Zhourui Liang, Xiutao Sun, Feijiu Wang, Wenjun Wang, Fuli Liu
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A2004

Sargassum thunbergii is of great economic and ecological value to sea cucumber cultures and seaweed beds. However, studies on photosynthesis and respiration of S. thunbergii are limited. In this study, a liquid-phase oxygen electrode system and a chlorophyll fluorescence spectrometer were used to determine the photosynthetic characteristics of S. thunbergii seedlings at various light intensities, temperatures, and salinities. The light-saturated net photosynthetic rates, light saturation points, and respiratory rates of germlings were investigated. Results showed that the increase in rate of light saturation point was slow in the first 4 d, rapidly increased from 5 d to 9 d, and then gently increased at the final few days of the 15 d indoor culture period. The photosynthetic rate or respiratory rate of the seedlings rapidly and significantly decreased when the temperature was <10°C or >28°C. Short-term high- or low-salinity shock had significant effect on the photosynthetic and respiratory rates of the seedlings, specifically at 10 and 50 psu. However, the photosynthetic and respiratory rates recovered to the normal levels after 24 h of recovery period, which demonstrated a powerful ion-transport system of the seedlings. These results provided reference for the artificial breeding of S. thunbergii.

Reproductive Biology of Sargassum thunbergii (Fucales, Phaeophyceae)  [PDF]
Zhourui Liang, Feijiu Wang, Xiutao Sun, Wenjun Wang, Fuli Liu
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.517271

Sargassum thunbergii is an economically important brown alga that is used as a perferred food for sea cucumber in China. However, reports on the reproductive biology of S. thunbergii are limited. This study observed the characteristics of mature receptacles. The effects of different temperatures, light intensities, and photoperiods on the egg release of mature S. thunbergii receptacles were investigated. A liquid-phase oxygen electrode system was used to obtain light saturation and light compensation points of egg and young thalli of S. thunbergii. Results showed that temperature was the key factor for the egg release of mature receptacles. The conditions most conducive to egg release were 20°C to 23°C temperature and 50 μmol photons m-2·s-1 to 200 μmol photons m-2·s-1

A Discussion on Sedimentary Environment of the Guanyinqiao Member from the Upper Ordovician in Yangtze Area  [PDF]
Yunpeng Xiao, Wenjun Liang, Chunyan Sun, Mingyi Hu
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.33016
Abstract: Based on the comparison between the sedimentary rate of the Guanyinqiao Member and modern deep sea, as well as the analysis of paleoecology, biopalaeogeographic features, sea level changes and comprehensive sedimentary characteristics, it is demonstrated by the authors that the Guanyinqiao Member in the Yangtze area is formed in the deep sea environment and belongs to contourite facies. The relationship between the events and the mass extinction at the turn of Ordovician-Silurian is discussed. The authors believe that the high-frequency volcanic events, which are widely developed at that time, may be the main and direct cause of the extinction. The coupling effects of volcanic events, iridium and carbon isotope abnormities and the initial hypoxia events in the early Silurian may be the main cause of the extinction of the Hirnantia-Dalmanitina fauna.
CayleyCCC: A Robust P2P Overlay Network with Simple Routing and Small-World Features
Wenjun Xiao,Mingxin He,Huomin Liang
Journal of Networks , 2011, DOI: 10.4304/jnw.6.9.1247-1253
Abstract: Recent peer-to-peer (P2P) systems research has focused on building highly usable P2P overlay networks. Short query paths, small routing tables, and robustness constitute the most prominent design objectives for the overlay topology. In this paper, we introduce a general group theoretic method and define a new Cayley graph. We then use these constructs to derive a novel P2P overlay structure. CayleyCCC, our proposed overlay network, has many desirable features, including short query paths, compact routing tables, high clustering, and robustness. Because of its symmetry, our design offers simpler routing (searching) and several other desirable properties compared with many previously proposed overlay networks, such as Chord and Ulysses. Performance evaluation results, reported in this paper, quantify the advantages of CayleyCCC in terms of query path length, routing table size, and robustness relative to some recent proposals. CayleyCCC is particularly useful in distributed computing under relatively stable conditions.
The Application of a New Neutron Induced Gamma Ray Spectroscopy Tool in Evaluation the Shale Gas in Fuling Shale Gas Field  [PDF]
Wei Yan, Minggang Feng, Yue Wang, Shuai Liu, Kaixuan Li, Xianran Zhao, Wenjun Liang
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32008
Abstract: Shale gas reservoir is characterized by complex lithology with ultra-low porosity and permeability, which brings many challenges in the formation evaluation. Elemental Capture Spectroscopy Sonde (ECS) can be used to measure the elements and get the formation of the mineralogy. LithoScanner is a newly-generated spectroscopy tool, which can be used to measure both inelastic and capture spectra, providing estimation of more elements, including silicon, calcium, iron, sulfur, titanium, gadolinium, aluminum, potassium, sodium, magnesium, manganese, carbon, etc. LithoScanner can be directly used to measure the total organic carbon content (TOC) in the formation, and provide solutions to the lithology classification and heterogeneous rock analysis (HRA). The changing lithology and borehole rugosity have little influence on the direct measurement of TOC by LithoScanner. LithoScanner shows great advantage in accuracy when comparing with other methods using triple-combo. The systematic lithology classification method in shale gas reservoir using LithoScanner is correlatable in multi-wells. The brittleness index from mineralogy can be applied to hydraulic stimulation. HRA results offered guides in both the coring sample selection and the experiment. The advantages of LithoScanner in shale gas formation evaluation were presented in this paper, and the workflow can also be applied to other reservoirs.
The Line Clipping Algorithm Basing on Affine Transformation  [PDF]
Wenjun Huang
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.26046
Abstract: A new algorithm for clipping line segments by a rectangular window on rectangular coordinate system is presented in this paper. The algorithm is very different to the other line clipping algorithms. For the line segments that cannot be identified as completely inside or outside the window by simple testings, this algorithm applies affine transformations (the shearing transformations) to the line segments and the window, and changes the slopes of the line segments and the shape of the window. Thus, it is clear for the line segment to be outside or inside of the window. If the line segments intersect the window, the algorithm immediately (no solving equations) gets the intersection points. Having applied the inverse transformations to the intersection points, the algorithm has the final results. The algorithm is successful to avoid the complex classifications and computations. Besides, the algorithm is effective to simplify the processes of finding the intersection points. Comparing to some classical algorithms, the algorithm of this paper is faster for clipping line segments and more efficient for calculations.
Integrated Web Architecture Based on Web3D, Flex and SSH  [PDF]
Wenjun ZHANG
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.31009
Abstract: Focusing on the problems occurred in traditional 2D image-word-based web applications, the author put forward con-cept of integrating Web3D, Flex and SSH technologies to create advanced “3D Virtual Reality & RIA” web application architecture, researched mechanisms of their architectures, and implemented their integration and communication & interaction: Flex and Struts2 via XML, Flex and Spring & Hibernate via BlazeDS, Flex and Web3D via JavaScript. The practice has shown that the integrated web architecture based on Web3D, Flex and SSH is effective and valuable.
Containerless processing by single-axis electrostatic levitation
Liang Hu,HaiPeng Wang,WenJun Xie,BingBo Wei
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-010-9984-x
Individual Tree Simulation and Stand Visualization of Pinus Tabulaeformis Plantation
Guanglei Gao,Guodong Ding,Yintong Zang,Wenjun Liang
International Journal of Emerging Sciences , 2011,
Abstract: Forest visualization is a scientific, technical and efficient assistant tool for forest resources data management, forest management plan assesses and designs. Expending little time and investment but providing huge amount of benefits, forest visualization tools play a more increasingly important role in modern forest management, especially in China that has the largest plantation in the world. In this present paper, we reported a successful application of forest visualization of Pinus tabulaeformis Carr plantation using the outstanding stand visualization tool, Landscape Management System-Stand Visualization System (LMS-SVS) in Mulan-Weichang Forestry Administration of Hebei province, China. In addition, the outcomes of stand visual simulation were also analyzed and discussed. The study indicates that the LMS-SVS can provide direct, three-dimensional and elegant plan, profile and perspective views, and extensive statistical charts of the experimental P. tabulaeformis Carr plantation. In the fictitious forest environment, using freely individual tree marking, the LMS-SVS can design or modify the forest management plans, and simulates the whole forest management process for certain goals. As a conclusion, the LMS-SVS is an ideal tool for visual forest management and has broad prospects for a modern forestry in China.
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