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Search Results: 1 - 10 of 82431 matches for " Feng Ping Huang Mingxuan "
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Query Expansion of Pseudo Relevance Feedback Based on Feature Terms Extraction and Correlation Fusion
特征词抽取和相关性融合的伪相关反馈查询扩展

Feng Ping Huang Mingxuan,
冯平
,黄名选

现代图书情报技术 , 2011,
Abstract: Aiming at the term mismatch issues of existing information retrieval systems, a novel query expansion algorithm of pseudo relevance feedback is proposed based on feature terms extraction and correlation fusion. At the same time, a new computing method for weights of expansion terms is also given. The algorithm can extract feature terms related to original query from the n chapter top-ranked retrieved local documents, and then identify those feature terms as final expansion terms according to the frequency of each feature term appeared in the local documents and the correlation between each feature term and the entire original query for query expansion. The results of the experiment show that the method is effective,and it can enhance and improve the performance of information retrieval.
Preparation and Characterization of Novel Drug-Inserted-Montmorillonite Chitosan Carriers for Ocular Drug Delivery  [PDF]
Dongzhi Hou, Ruyi Gui, Sheng Hu, Yi Huang, Zuyong Feng, Qineng Ping
Advances in Nanoparticles (ANP) , 2015, DOI: 10.4236/anp.2015.43009
Abstract: The objective of the study was to investigate the potential of montmorillonite as a sustained carrier in the preparation of drug-loaded nanoparticles for prolonged ocular application. Nanoparticles were prepared by ionic gelation of chitosan with sodium tripolyphosphate (TPP). Betaxolol hydrochloride (BH) was applied as a model drug. TG, FT-IR, TEM, DLS and XRD have been employed in the characterization of drug-encapsulated chitosan-montmorillonite/TPP nanoparticles (CS-MMT/TPP NPs). TEM images showed that the particles were spherical in shape and had a rough surface. The size range of the nanoparticles was between 338 and 585 nm with positive zeta potential values from 24 mV to 36 mV and encapsulation efficiency values ranging from 12.27% to 50.92%. In vitro sustained drug release was observed with the BH-loaded nanoparticles in artificial tears (pH 7.4). The results of FT-IR, TG and XRD showed that the drug was coated with CSMMT/ TPP NPs. In the mucoadhesion studies, an interaction was found between drug-loaded CSMMT/ TPP NPs and mucin, which could enhance precorneal residence time and hence facilitate an effective sustained release. The optimized formulation was determined to be non-irritant and tolerable by modified Draize test. Therefore, the BH-loading CS-MMT/TPP NPs developed are a promising carrier for controlled drug delivery to the eye.
Bile Acid Effects on Placental Damage in Intrahepatic Cholestasis of Pregnancy  [PDF]
Feng Xie, Xiaofeng Liu, Ping Xiao, Yang Huang, Qiaobing Chen, Li Zhou
Journal of Biosciences and Medicines (JBM) , 2018, DOI: 10.4236/jbm.2018.66003
Abstract: Aims: The abnormal increase of bile acid is found in intrahepatic cholestasis of pregnancy (ICP). It also can be observed the damage of placental tissue in ICP. The aim of this study was to find the associations of the bile acid in umbilical vein and the damage of placental tissue. Methods: Thirty women diagnosed with ICP and fifty normal pregnant women between September 2015 and September 2017 at Nanshan District Maternity & Child Healthcare Hospital of Shenzhen were included in this study. The glycocholic acid (GA), total bile acids (TBA), total bilirubin (TB), direct bilirubin (DB) and albumin level in umbilical vein were measured by cycle enzyme method in ICP and control group. The placental damage was analyzed by morphologic study using hematoxylin dyes in two groups. The correlation between the level of the bile acid in the umbilical vein and the damage of the placenta was assessed using SPSS software. Results: The GA, TBA, TB, DB and albumin level in umbilical vein were significantly higher in ICP than those of pregnant women, respectively. The placental villis were expanded and the structure was destroyed in ICP. The vessel was damaged and the cell trophoblast hyperplasia in ICP. It also can be seen that there was obvious nodules and a typical fibrous necrotic substance in ICP but not in control group. There is a positive correlation between the level of the TBA in the umbilical vein and the damage of the placenta in ICP. Conclusion: The TBAs were significantly higher in umbilical vein and were related to the placental damage in ICP.
Convergence Theorem for Asymptotically Quasi Pseudo-Contractive Type Nonself-mappings
HUANG Jin-ping,PENG Feng-ping,DAI Min
Journal of Chongqing Normal University , 2011,
Abstract: Chidume first introduced the definition of asymptotically nonexpansive nonself-mappings and uniformly L-Lipschitzan nonself mappings. Furthermore he proved that the iterative sequence converged strongly to fixed points of asymototically nonexpansive nonselfmappings . In this paper, the definition of asymptotically pseudo-contractive type nonself-mappings, asymptotically quasi pseudo-contractive type nonself-mappings is introduced. Suppose E is a real Banach space, let K be a retract of E, P be a nonexpansive retraction from E to K ,T is L-Lipschitzan asymptotically quasi pseudo-contractive type nonself-mappings , under some restricted conditions on the parameters. An necessary and sufficient condition is given for the modified Ishikawa iterative sequence with error to converge strongly to a fixed point of T, Suppose there exist a strictly increasing function*, such that lim sup inf *. The objective of this article is to extend the asymptotically quasi pseudo-contractive type mappings to asymptotically quasi pseudo-contractive type nonself-mappings. Therefore, the results presented in this paper extended the previous work.(* Indicates a formula, please see the full text)
An Empirical Analysis of Chinese Commercial Banks’ Efficiency and Influencing Factors
—Under the Constraint of Non-Performing Loans
 [PDF]

Mingxuan Tuo
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.64042
Abstract: This article is based on the SBM-Undesirable model to measure and decompose the technical efficiency of commercial banks from 2003 to 2014, and based on panel date to decompose its affecting factors. Our research shows: Since the banking began to reform from 2003, technical efficiency and pure technical efficiency have been significantly increased, the efficiency of scale also had obvious improved before 2008, thereafter growth is more gentle, and even state-owned banks are experiencing a downward trend. Reform impact is more consistent for different types of banks, basically promoting the improvement of the efficiency of the bank. With the advance of market interest rates, internal factors such as management, business innovation become the key to enhance the efficiency of banking sector. If the banks do not continue to reform and still blindly expand the scale of assets, they will not get higher efficiency.
Photonic band structure of three-dimensional colloidal crystals withfield-induced lattice structure transformation

Zhang Li-Feng,Huang Ji-Ping,

中国物理 B , 2010,
Abstract: By utilizing the electrorheological effect, three-dimensional colloidal crystals can be produced, whose lattice structure can be changed from the body-centered-tetragonal lattice to other lattices under the application of electric fields. This paper calculates photonic band structures of such crystals with lattice structure transformation, and demonstrates the existence of complete band gaps for some intermediate lattices. Thus, it becomes possible to use the electrorheological effect to achieve photonic crystals with desired photonic gap properties resulting from tunable structures.
Rare Variants Detection with Kernel Machine Learning Based on Likelihood Ratio Test
Ping Zeng, Yang Zhao, Liwei Zhang, Shuiping Huang, Feng Chen
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0093355
Abstract: This paper mainly utilizes likelihood-based tests to detect rare variants associated with a continuous phenotype under the framework of kernel machine learning. Both the likelihood ratio test (LRT) and the restricted likelihood ratio test (ReLRT) are investigated. The relationship between the kernel machine learning and the mixed effects model is discussed. By using the eigenvalue representation of LRT and ReLRT, their exact finite sample distributions are obtained in a simulation manner. Numerical studies are performed to evaluate the performance of the proposed approaches under the contexts of standard mixed effects model and kernel machine learning. The results have shown that the LRT and ReLRT can control the type I error correctly at the given α level. The LRT and ReLRT consistently outperform the SKAT, regardless of the sample size and the proportion of the negative causal rare variants, and suffer from fewer power reductions compared to the SKAT when both positive and negative effects of rare variants are present. The LRT and ReLRT performed under the context of kernel machine learning have slightly higher powers than those performed under the context of standard mixed effects model. We use the Genetic Analysis Workshop 17 exome sequencing SNP data as an illustrative example. Some interesting results are observed from the analysis. Finally, we give the discussion.
Origin of the different conductive behavior in pentavalent-ion-doped anatase and rutile TiO$_2$
Kesong Yang,Ying Dai,Baibiao Huang,Yuan Ping Feng
Physics , 2012, DOI: 10.1088/0022-3727/47/27/275101
Abstract: The electronic properties of pentavalent-ion (Nb$^{5+}$, Ta$^{5+}$, and I$^{5+}$) doped anatase and rutile TiO$_2$ are studied using spin-polarized GGA+\emph{U} calculations. Our calculated results indicate that these two phases of TiO$_2$ exhibit different conductive behavior upon doping. For doped anatase TiO$_2$, some up-spin-polarized Ti 3\emph{d} states lie near the conduction band bottom and cross the Fermi level, showing an \emph{n}-type half-metallic character. For doped rutile TiO$_2$, the Fermi level is pinned between two up-spin-polarized Ti 3\emph{d} gap states, showing an insulating character. These results can account well for the experimental different electronic transport properties in Nb (Ta)-doped anatase and rutile TiO$_2$.
Optical-Electronic Properties of Carbon-Nanotubes Based Transparent Conducting Films  [PDF]
Kuan-Ru Chen, Hsiu-Feng Yeh, Hung-Chih Chen, Ta-Jo Liu, Shu-Jiuan Huang, Ping-Yao Wu, Carlos Tiu
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.31013
Abstract:

Three coating methods (slot, dip and blade coatings) were used separately to coat a well-dispersed single-wall carbonnanotube (SWCNT) solution on polyethylene terephthalate (PET) film, and the resulting optical and electronic properties were measured and compared. It was found that the sheet resistance and the transparency of the SWCNT coated film decreased as the coating speed increased for dip and blade coatings, but were independent of the coating speed for slot coating. All three coating methods were able to produce transparent conductive film with transparency above 85% and sheet resistance close to 1000 ohm/sq. For industrial production, the slot die coating method appears to be more suitable in terms of high coating speed and uniformity of optical and electronic properties.

Query Expansion of Local Feedback Based on Improved Apriori Algorithm
基于Apriori改进算法的局部反馈查询扩展

Chen Yanhong,Huang Mingxuan,
陈燕红
,黄名选

现代图书情报技术 , 2007,
Abstract: An improved Apriori algorithm for query expansion is presented based on the thrice pruning strategy.This method can tremendously enhance the mining efficiency.After studying the limitations of existing query expansion,a novel query expansion algorithm of local feedback is proposed based on the improved Apriori algorithm.This algorithm can automatically mine those association rules related to original query in the top-rank retrieved documents using the improved Apriori algorithm,to construct an association rules-based database,and extract expansion terms related to original query from the database for query expansion. Experimental results show that our method is better than traditional ones in average precision.
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