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Search Results: 1 - 10 of 22086 matches for " DU Qin "
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Cloud and Open BIM-Based Building Information Interoperability Research  [PDF]
Du Juan, Qin Zheng
Journal of Service Science and Management (JSSM) , 2014, DOI: 10.4236/jssm.2014.72005

The emergence of Open BIM effectively improves the interoperability of building information. Besides, cloud technology supports virtualization and QoA (Quality of Assurance) in the case of the distributed system and multi-user collaboration. Based on the cloud and the Open BIM, this paper puts forward the cloud services models and the cloud-based Open BIM building information interaction framework, and further illustrates the architecture of cloud deployment pattern and the information interaction process. Finally, the paper takes underground rail transit project as example and explains how to deploy and implement the tunnel construction management platform.

Random Attractors for the Kirchhoff-Type Suspension Bridge Equations with Strong Damping and White Noises  [PDF]
Chuangliang Qin, Jinji Du, Guoguang Lin
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2017, DOI: 10.4236/ijmnta.2017.64012
Abstract: In this paper, we investigate the existence of random attractor for the random dynamical system generated by the Kirchhoff-type suspension bridge equations with strong damping and white noises. We first prove the existence and uniqueness of solutions to the initial boundary value conditions, and then we study the existence of the global attractors of the equation.
Efficient Iterative Method for Solving the General Restricted Linear Equation  [PDF]
Xiaoji Liu, Weirong Du, Yaoming Yu, Yonghui Qin
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.62039
Abstract: An iterative method is developed for solving the solution of the general restricted linear equation. The convergence, stability, and error estimate are given. Numerical experiments are presented to demonstrate the efficiency and accuracy.
Functional analysis of the Myostatin gene promoter in sheep
Rong Du,XiaoRong An,YongFu Chen,Jian Qin
Science China Life Sciences , 2007, DOI: 10.1007/s11427-007-0085-2
Abstract: Compared with the understanding for the functional mechanism of the myostatin gene, little is known about the regulatory mechanism of the myostatin gene transcription and expression. To better understand the function of the myostatin gene promoter (MSTNpro) in the transcriptional regulation of the myostatin gene and to further investigate the transcriptional regulation mechanism of the myostatin gene, the promoter region of the myostatin gene in sheep has been cloned in our recent study (AY918121). In this study, the wild (W) type MSTNPro W -EGFP vectors and E-box (E) (CANNTG) mutant (M) type MSTNPro E(3+5+7)M -EGFP vectors were constructed and the transcriptional regulation activities were compared by detecting the fluorescent strength of EGFP (enhanced green fluorescent protein) in C2C12 myoblasts (or myotubes) and sheep fibroblasts transfected with the vectors. Results showed that the 0.3–1.2 kb sheep myostatin promoter could activate the transcription and expression of EGFP gene in C2C12 myoblasts to different extent and the 1.2 kb promoter was the strongest. However, fluorescence was not observed in the sheep fibroblasts transfected with the 1.2 kb sheep myostatin promoter. These results suggested that the specific nature of the myostatin gene expression in skeletal muscle was attributed to the specific nature of the myostatin promoter activity. The increasing growth density of C2C12 myoblasts inhibited the transcriptional regulation activity of the wild type sheep myostatin promoter by a mechanism of feedback. The transcriptional regulation activity of the 1.2 kb wild type sheep myostatin promoter increased significantly after C2C12 myoblasts were differentiated, while the activity of 1.2 kb E(3+5+7)-mutant type myostatin promoter had no obvious change. This result suggested that MyoD may be responsible for the difference of the myostatin gene transcription and expression between growing and differentiating conditions by binding to E-box of the myostatin promoter.

QU Ying QIN Mingda DU Cainan,

金属学报 , 1987,
Abstract: A mathematical model is proposed and solved for the after-decarbonization at a range of low carbon using the stochastic differential equation.Certain statisti- cal parameters of the solution process have been calculated and discussed.The reliability of the model is verified by experimental data taking the volumetric mass transfer coefficient to be a constant.The application of the model to con- trol the after-decarbonization of converter process is studied considering an exten- sion of the volumetric mass transfer coefficient into general stochastic parame- ter.
PCDS: Power Control with Opportunistic Scheduling for Cognitive Radio Networks Reconfiguration
Hang Qin,Jun Su,Youfu Du
Journal of Networks , 2011, DOI: 10.4304/jnw.6.1.80-87
Abstract: Cognitive Radio network (CRN) is a network composed of elements that, through learning and reasoning, dynamically adapt to varying network conditions in order to improve spectrum efficiency for wireless networking. To investigate opportunistic scheduling, this paper develops a methodology based on the jointly consideration of the power control, spectrum allocation and flow routing. The two-phrase cross-layer design with multi-user interference consideration is explained. The influences from the diverse transmission power control are identified. To support user communication sessions, the Power Control with Decentralized Scheduling (PCDS) algorithm with reconfiguration management scheme is presented, which can dramatically improve spectral efficiency and performance of a multi-hop network. Using Bandwidth Foot
Molecular Cloning, Characterization and Expression Analysis of Macrohage-Colony Stimulating Factor 2 Gene from Grass Carp (Ctenopharyngodon idellus)  [PDF]
Linyong Du, Lei Qin, Shangnian Wang, Lu Yang, Kun Yang, Xinyan Wang, Hong Zhou
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B046

Macrophage colony-stimulating factor (CSF-1/M-CSF) is a key factor for the differentiation, growth and survival of monocytes/macrophages and osteoclasts. The functions of M-CSF have been well characterized in mammals. In this study, we have cloned and sequenced the cDNA of M-CSF2 in grass carp. The grass carp M-CSF2 cDNA was 1487 bp in length, containing an open reading frame of 855 bp that encodes 284 amino acids. The deduced protein of grass carp M-CSF2 possessed same domains similar to its mammalian counterparts. Multiple alignments and phylogenetic tree indicate that the grass carp M-CSF2 exhibits close evolutionary relationship with its counterparts in other teleosts. Lastly, the tissue distribution results also showed that the grass carp M-CSF2 transcript was dominantly expressed in head kidney, kidney and spleen in vivo.

Does N200 Reflect Semantic Processing?—An ERP Study on Chinese Visual Word Recognition
Yingchun Du, Qin Zhang, John X. Zhang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0090794
Abstract: Recent event-related potential research has reported a N200 response or a negative deflection peaking around 200 ms following the visual presentation of two-character Chinese words. This N200 shows amplitude enhancement upon immediate repetition and there has been preliminary evidence that it reflects orthographic processing but not semantic processing. The present study tested whether this N200 is indeed unrelated to semantic processing with more sensitive measures, including the use of two tasks engaging semantic processing either implicitly or explicitly and the adoption of a within-trial priming paradigm. In Exp. 1, participants viewed repeated, semantically related and unrelated prime-target word pairs as they performed a lexical decision task judging whether or not each target was a real word. In Exp. 2, participants viewed high-related, low-related and unrelated word pairs as they performed a semantic task judging whether each word pair was related in meaning. In both tasks, semantic priming was found from both the behavioral data and the N400 ERP responses. Critically, while repetition priming elicited a clear and large enhancement on the N200 response, semantic priming did not show any modulation effect on the same response. The results indicate that the N200 repetition enhancement effect cannot be explained with semantic priming and that this specific N200 response is unlikely to reflect semantic processing.
Performance Improvement of Receivers Based on Ultra-Tight Integration in GNSS-Challenged Environments
Feng Qin,Xingqun Zhan,Gang Du
Sensors , 2013, DOI: 10.3390/s131216406
Abstract: Ultra-tight integration was first proposed by Abbott in 2003 with the purpose of integrating a global navigation satellite system (GNSS) and an inertial navigation system (INS). This technology can improve the tracking performances of a receiver by reconfiguring the tracking loops in GNSS-challenged environments. In this paper, the models of all error sources known to date in the phase lock loops (PLLs) of a standard receiver and an ultra-tightly integrated GNSS/INS receiver are built, respectively. Based on these models, the tracking performances of the two receivers are compared to verify the improvement due to the ultra-tight integration. Meanwhile, the PLL error distributions of the two receivers are also depicted to analyze the error changes of the tracking loops. These results show that the tracking error is significantly reduced in the ultra-tightly integrated GNSS/INS receiver since the receiver’s dynamics are estimated and compensated by an INS. Moreover, the mathematical relationship between the tracking performances of the ultra-tightly integrated GNSS/INS receiver and the quality of the selected inertial measurement unit (IMU) is derived from the error models and proved by the error comparisons of four ultra-tightly integrated GNSS/INS receivers aided by different grade IMUs.
Breast Cancer in Inner Mongolia 2009-2011  [PDF]
Qin Li, Maolin Du, Kepeng Xin, Rong Liu, Yun Li, Wuyuntana Li, Xiong Su, Juan Sun
Open Journal of Epidemiology (OJEpi) , 2014, DOI: 10.4236/ojepi.2014.42011
Abstract: The aim of this study was to determine the mortality rate and the burden of breast cancers among residents of Inner Mongolia. We analyzed mortality data reported by the Death Registry System from 2009 to 2011. The age-specific mortality of breast cancer was close to female cancer in 25 to 35 years group. Regional distribution of breast cancer was not significant difference (p = 0.36). The women who were employed, married and living in rural areas were more likely to die of breast cancer. Over the period 2009 through 2011, the elimination of deaths from breast cancer resulted in increased life expectancy of 0.15 years. Mortality due to breast cancers is substantially greater among the younger women. Further, the mortality rate associated with breast cancers is greater for employed and married women than those unemployed and single women. Therefore, in Inner Mongolia, breast cancers appear to pose a greater mortality risk for young, employed and married women.
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