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Search Results: 1 - 10 of 14189 matches for " Fei Zou "
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Coal Deformation, Metamorphism and Tectonic Environment in Xinhua, Hunan  [PDF]
Huantong Li, Xiaoyan Zou, Jiafeng Mo, Yifan Wang, Fei Chen
Journal of Geoscience and Environment Protection (GEP) , 2018, DOI: 10.4236/gep.2018.69013
Abstract: This article discusses in detail chemical composition, molecular structure, microstructure phenomena, estimate of the palaeo-stress, paleo-temperature and the strain rate to deepen the knowledge for the correlation of coal deformation and metamorphism with structural environment in Xinhua Hunan by coal quality analysis, XRD and SEM methods, which provide dependable theoretical foundation for coal resource exploitation and utilization. The results show that 1) d002 value of six coal samples is from 3.36 to 3.39 nm, coal resolved itself into aphanitic graphite with the increase of coal rank during coalification, which is characterized by graphite flakes, and the crystallite size is from 50 nm to 250 nm; A certain degree of 3R-structure content is increases and the crystallite size is extend with the coalification process, but RH-structure content is decreased; 2) the tectonic environment of research area belongs to the ductile-brittle deformation, which was characterized by low temperature, low stress, high strain rate; 3) Tianlongshan magmatic intrusion provided heat source, its side-extrusion made the molecules structure of coal ordering, distance between layers decreased, finally it caused the formation of aphanitic graphite.
Research on Self Organizing of Internet of Things Nodes in Closed Area  [PDF]
Qian Zou, Wei Huang, Fei Long, Yang Yang
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.611030
Abstract:
In this paper, the intelligent application we designed focuses on a closed family area. ZigBee technology is mainly used to achieve the remote control. The most popular Android system is used in the design. The operation interface on the home intelligent gateway is completed through the designed system. It can allow people the full control by using smartphones. The system is operated and controlled through touch panel. Furthermore, it can be controlled remotely by using smartphones. ZigBee module is expected to be used to allow these devices to perform data transmission and collection. Some additional machinery, control circuits, and sensors will be designed for doors and windows. For example, a motor and a control circuit are installed to control doors and windows, and ZigBee is used to control the power input and drive the motor. Antitheft sensors, such as infrared sensors or light sensors, are installed to monitor the objects. Home gateway can collect ZigBee information on doors and windows, and an interactive mechanism is designed to take effective remote control.
The Relative Prevalence of Typhoid and Malaria in Febrile Patients in Freetown, Sierra Leone  [PDF]
Michaella Siatta Kargbo, Lamin Daddy Massaquoi, Sallieu Kabay Samura, Xiaojing Meng, Fei Zou
Open Journal of Preventive Medicine (OJPM) , 2014, DOI: 10.4236/ojpm.2014.45041
Abstract:

Malaria and typhoid fever are debilitating diseases responsible for the deaths of thousands of lives annually. Over the last decade both diseases have received increasing attention with particular focus on malaria. However, recent reports indicate an increasing co-infection rate between mala- ria and typhoid fever. Familiar signs and symptoms of both diseases have led to the belief in some communities that it’s a new disease. In this study, we investigated the relationship between mala- ria and typhi O and H antigens among patients reporting with fever. Patients reporting with fever from April 2013-March 2014 were recruited for the study. Our results showed that there was no association between having malaria and typhoid fever infection. However, having fever was asso- ciated with having both diseases. Also, fever among patients was more likely to be caused by Sal- monella typhi O and H antigens than plasmodium parasites. Infections of both diseases were higher in wet season than in dry season. The study recommends that malaria and typhoid fever intervention programs are increased in endemic areas. Also attention should be paid to typhoid fever infection rates in the country.

Convergence and prediction of principal component scores in high-dimensional settings
Seunggeun Lee,Fei Zou,Fred A. Wright
Statistics , 2012, DOI: 10.1214/10-AOS821
Abstract: A number of settings arise in which it is of interest to predict Principal Component (PC) scores for new observations using data from an initial sample. In this paper, we demonstrate that naive approaches to PC score prediction can be substantially biased toward 0 in the analysis of large matrices. This phenomenon is largely related to known inconsistency results for sample eigenvalues and eigenvectors as both dimensions of the matrix increase. For the spiked eigenvalue model for random matrices, we expand the generality of these results, and propose bias-adjusted PC score prediction. In addition, we compute the asymptotic correlation coefficient between PC scores from sample and population eigenvectors. Simulation and real data examples from the genetics literature show the improved bias and numerical properties of our estimators.
The Joint Action of Destruxins and Botanical Insecticides (Rotenone, Azadirachtin and Paeonolum) Against the Cotton Aphid, Aphis gossypii Glover
Fei Yi,Chunhua Zou,Qiongbo Hu,Meiying Hu
Molecules , 2012, DOI: 10.3390/molecules17067533
Abstract: The joint action of destruxins and three botanical insecticides, rotenone (Rot), azadirachtin (Aza) and paeonolum (Pae) against the cotton aphid, Aphis gossypii, was bioassayed. In laboratory experiment, several synergistic groups of destruxins with botanical insecticides were found by means of Sun’s Co-toxicity Coefficients (CTC) and Finney’s Synergistic Coefficient (SC). The best synergistic effect was discovered in the ratio group Des/Rot 1/9 with the CTC or SC and LC50 values of 479.93 or 4.8 and 0.06 μg/mL, respectively. The second and third synergistic effects were recorded in the ratio groups Des/Rot 7/3 and 9/1. Although the ratio groups Des/Aza 6/4, Des/Pae 4/6, 3/7 and 2/8 indicated synergism by Sun’s CTC, they were determined as additive actions by Finney’s SC. Additive actions were also found in most of the ratio groups, but antagonism were recorded only in three ratio groups: Des/Pae 9/1, 7/3 and 6/4. In greenhouse tests, the highest mortality was 98.9% with the treatment Des/Rot 1/9 at 0.60 μg/mL, meanwhile, the treatments Des/Pae 4/6 and Des/Aza 6/4 had approximately 88% mortality.
Tools for efficient epistasis detection in genome-wide association study
Xiang Zhang, Shunping Huang, Fei Zou, Wei Wang
Source Code for Biology and Medicine , 2011, DOI: 10.1186/1751-0473-6-1
Abstract: We have developed a set of three efficient programs, FastANOVA, COE and TEAM, that support epistasis test in a variety of problem settings in GWAS. These programs utilize permutation test to properly control error rate such as family-wise error rate (FWER) and false discovery rate (FDR). They guarantee to find the optimal solutions, and significantly speed up the process of epistasis detection in GWAS.A web server with user interface and source codes are available at the website http://www.csbio.unc.edu/epistasis/ webcite. The source codes are also available at SourceForge http://sourceforge.net/projects/epistasis/ webcite.Genome-wide association study (GWAS) examines the genetic variants across the entire genome to identify genetic factors associated with observed phenotypes. It has been shown to be a promising design to locate genetic factors causing phenotypic differences [1,2]. Since most traits of interest are complex, finding gene-gene interaction has received increasing attention in recent years [3,4]. Unlike single-locus approaches, which test and estimate the association between the phenotype and one marker (or SNP) at a time, two-locus epistasis detection approaches search for associations between the phenotype and each SNP-pair.In general, there are two challenges in epistasis detection. The first is to develop statistical test that can effectively capture the interaction between SNPs. The second challenge is to reduce the computational burden since there are an extremely large number of SNP-pairs need to be tested in the whole genome. The computational challenge is further compounded by the multiple testing problem. Controlling family-wise error rate (FWER) and false discovery rate (FDR) are two standard approaches for controlling error rates [5]. With large number of SNPs correlated, permutation test is preferred over simple Bonferroni correction [6], which is often to conservative. The idea of permutation procedure is to randomly shuffle the phenotype
Aqua(4-carboxypyridine-2,6-dicarboxylato-κ3O2,N,O6)(1,10-phenanthroline-κ2N,N′)nickel(II)
Qin Zou,Jian-fei Wang,Jian-li Lin
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811026055
Abstract: The title compound, [Ni(C8H3NO6)(C12H8N2)(H2O)], contains an NiII ion, a 1,10-phenanthroline (phen) ligand, a 4-carboxypyridine-2,6-dicarboxylate (Hptc2 ) anion and a coordinated water molecule. The NiII atom exhibits a distorted octahedral N3O3 environment. O—H...O hydrogen bonding between coordinated water and carboxylate O atoms, as well as π–π stacking interactions [interplanar distances between phen rings = 3.293 (2) ] lead to a supermolecular assembly.
Lasting Controversy on Ranibizumab and Bevacizumab
Lihui Zou, Huiying Lai, Qi Zhou, Fei Xiao
Theranostics , 2011,
Abstract: Vascular endothelial growth factor (VEGF), an important angiogenic factor that is able to stimulate the proliferation and migration of endothelial cells, is the best-studied hallmark of angiogenesis. Neovascularization is a major cause of age-related macular degeneration (AMD) which is a leading cause of blindness in the elderly population. Specific molecular inhibitors of VEGF have been proved to be useful in the treatment of AMD. Ranibizumab and Bevacizumab are structurally similar to anti-VEGF drugs in the treatment of AMD. Many studies have indicated that Ranibizumab and Bevacizumab are of roughly equal short-term efficacy and safety, Bevacizumab is an attractive alternative to Ranibizumab due to its lower cost. However, only Ranibizumab has received Food and Drug Administration (FDA) approval for the treatment of macular degeneration. More multicenter clinical trials are required to compare the relative efficacy and safety of these two drugs and some progress has been achieved. This review discusses the clinical effectiveness, safety, cost and other practical implications of Ranibizumab and Bevacizumab.
Mathematical Modeling of Double-Skin Facade in Northern Area of China
Zou Huifen,Fei Yingchao,Yang Fuhua,Tang Hao
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/712878
Abstract:
Growth of Y-shaped Carbon Nanofibers from Ethanol Flames
Cheng Jin,Zou Xiaoping,Zhang Hongdan,Li Fei
Nanoscale Research Letters , 2008,
Abstract: Y-shaped carbon nanofibers as a multi-branched carbon nanostructure have potential applications in electronic devices. In this article, we report that several types of Y-shaped carbon nanofibers are obtained from ethanol flames. These Y-shaped carbon nanofibers have different morphologies. According to our experimental results, the growth mechanism of Y-shaped carbon nanofibers has been discussed and a possible growth model of Y-shaped carbon nanofibers has been proposed.
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