Search results for: Xuan Mao

Items from 1 to 20 out of 37 results

article

Photonic Routers: Multimode Interference Induced Optical Routing in an Optical Microcavity (Ann. Phys. 5/2021)

Hong Yang, Guo‐Qing Qin, Hao Zhang, Xuan Mao, more

Annalen der Physik > 533 > 5 > n/a - n/a

In article number 2000506, Gui#x02010;Lu Long and co#x02010;workers report the results of a study of multi#x02010;channel optical routing using optomechanical multimode interference in an optical microcavity. They show three#x02010;port routing in the red#x02010;detuned region to rout photons from the input port to an arbitrarily selected output port with high routing efficiency with this system....

article

Multimode Interference Induced Optical Routing in an Optical Microcavity

Hong Yang, Guo‐Qing Qin, Hao Zhang, Xuan Mao, more

Annalen der Physik > 533 > 5 > n/a - n/a

The photonic router is a key device in optical communication and quantum networks. Here, the results of a study of multi‐channel optical routing using optomechanical multimode interference in an optical microcavity are reported. The optomechanical system used here exhibits multi‐optical modes and a mechanical mode. Optomechanical induced transparency and absorption appear in the system due to the...

article

A numerical study on chloride diffusion in freeze-thaw affected concrete

Wen-qiang Jiang, Xiao-han Shen, Jin Xia, Li-xuan Mao, more

Construction and Building Materials > 2018 > 179 > C > 553-565

Existing concrete in cold or coastal regions is attacked by chloride penetration under freeze-thaw cycles (FTCs). The combined deterioration process accelerate the damage evolution of concrete and reduces the service life of concrete structures. This paper presents a mesoscopic numerical model, which is 2-D and 3-phases, to investigate the mechanism of chloride diffusion under FTCs in a quantitative...

article

Sintering kinetics of disperse ultrafine equiaxed α-Al2O3 nanoparticles

Wenbin Cao, Xuan Mao, Yuan Yuan, Lu Li, more

Journal of the European Ceramic Society > 2017 > 37 > 13 > 4005-4013

The sintering kinetics of ceramic nanoparticles is essential for preparing dense nanocrystalline ceramics with fine grains, but the sintering kinetics of disperse ultrafine α-Al₂O₃ nanoparticles has not been systematically explored so far. In this paper, the sintering kinetics of disperse ultrafine equiaxed α-Al₂O₃ nanoparticles with a mean particle size of 4.5nm and a narrow size distribution of...

article

Petersen estimator, Chapman adjustment, list effects, and heterogeneity

Chang Xuan Mao, Ruochen Huang, Sijia Zhang

Biometrics > 73 > 1 > 167 - 173

We use a nonparametric mixture model for the purpose of estimating the size of a population from multiple lists in which both the individual effects and list effects are allowed to vary. We propose a lower bound of the population size that admits an analytic expression. The lower bound can be estimated without the necessity of model‐fitting. The asymptotical normality of the estimator is established...

article

Sintering of α-Al2O3 nanocrystalline ceramic from large α-Al2O3 polycrystalline nanoparticles

Wenbin Cao, Xuan Mao, Lu Li, Bing Wang, more

Ceramics International > 2017 > 43 > 1(PB) > 1378-1382

Fine nanoparticles (NPs) exhibit higher sintering activity than large ones and are usually desired for sintering of nanocrystalline (NC) ceramics with fine grains. This paper demonstrates that large α-Al₂O₃ polycrystalline (PC) NPs with a mean particle size of 62nm show a similar sintering activity as α-Al₂O₃ single-crystal (SC) NPs with a mean particle size of 16nm.α-Al₂O₃ NC ceramics sintered from...

article

Dual responsive zein hydrogel membrane with selective protein adsorption and sustained release property

Hualei Qi, Jialin Cao, Yanjiao Xin, Xuan Mao, more

Materials Science and Engineering: C > 2017 > 70 > P1 > 347-356

Drug-loaded hydrogels have been paid increasing attentions in biomedical fields. As a sort of natural plant protein, zein generally cannot form hydrogel with high water retention because of its predominant hydrophobicity, which will limit its application as biomaterial. In this paper, zein electrospun fibrous membranes (ZEFM) are fabricated through a chemical modification of zein using citric acid...

article

Selective Corrosion Preparation and Sintering of Disperse α‐Al₂O₃ Nanoparticles

Ruiyun Guo, Wenbin Cao, Xuan Mao, Jiangong Li, more

Journal of the American Ceramic Society > 99 > 11 > 3556 - 3560

Disperse fine equiaxed α‐Al₂O₃ nanoparticles with a mean particle size of 9 nm and a narrow size distribution of 2–27 nm were synthesized using α‐Fe₂O₃ as seeds and isolation via homogeneous precipitation‐calcination‐selective corrosion processing. The presence of α‐Fe₂O₃ acting as seeds and isolation phase can reduce the formation temperature to 700°C and prevent agglomeration and growth of α‐Al₂...

article

Estimating population sizes with the Rasch model

Chang Xuan Mao, Cuiying Yang, Yitong Yang, Wei Zhuang

Annals of the Institute of Statistical Mathematics > 2017 > 69 > 3 > 705-716

The Rasch model has been used to estimate the unknown size of a population from multi-list data. It can take both the list effectiveness and individual heterogeneity into account. Estimating the population size is shown to be equivalent to estimating the odds that an individual is unseen. The odds parameter is nonidentifiable. We propose a sequence of estimable lower bounds, including the greatest...

article

A Population-Size Model for Protein Spot Detection in Proteomic Studies

Chang Xuan Mao, Sining Chen, Yitong Yang

Journal of Agricultural, Biological and Environmental Statistics > 2016 > 21 > 1 > 170-180

In proteomic studies, a population of proteins are often examined on a gel using a technique called two-dimensional gel eletrophoresis. The technique separates the protein population into individual protein spots on a two-dimensional gel by isoelectric charge and molecular weight. The resulting gel images are then processed by a software system for spot detection and subsequent analysis. The performance...

article

On the Chao and Zelterman estimators in a binomial mixture model

Chang Xuan Mao, Nan Yang, Jinhua Zhong

Statistical Methodology > 2015 > 22 > Complete > 17-22

Data from a surveillance system can be used to estimate the size of a disease population. For certain surveillance systems, a binomial mixture model arises as a natural choice. The Chao estimator estimates a lower bound of the population size. The Zelterman estimator estimates a parameter that is neither a lower bound nor an upper bound. By comparing the Chao estimator and the Zelterman estimator...

article

On the Residual Plot in a Mixture Model

Chang Cui, Chang Xuan Mao, Jinhua Zhong, Wei Zhuang

Journal of Agricultural, Biological and Environmental Statistics > 2015 > 20 > 2 > 218-228

The residual plot is a graphical diagnostic that can tell whether a mixture model is necessary. We establish the approximate joint normality of the residual function nonparametrically. We propose an approach to constructing simultaneous asymptotic confidence bands. Our investigation is extended to the empirical log-ratio plot to obtain better visual effect sometimes. The type I error rate is under...

article

Influence of gelling properties on protein imprinted agarose gel membrane

Hanbo Feng, Xuan Mao, Bin Chu, Chunlan Xie

Journal of Applied Polymer Science > 131 > 11 > n/a - n/a

A method based on molecular imprinting technique was presented for preparing protein‐imprinted agarose gel membrane (AGM) under moderate conditions, and the influencing factors such as molecular weights and modified chemical groups on the adsorption ability and selectivity of AGMs were investigated. The agaroses used for AGMs were prepared through ultrasonic degradation, oxidation degradation, gel‐melting...

article

Effects of sulfate group in red seaweed polysaccharides on anticoagulant activity and cytotoxicity

Wanai Liang, Xuan Mao, Xiaohui Peng, Shunqing Tang

Carbohydrate Polymers > 2014 > 101 > Complete > 776-785

In this paper, the structural effects of two main red seaweed polysaccharides (agarose and carrageenan) and their sulfated derivatives on the anticoagulant activity and cytotoxicity were investigated. The substitution position rather than the substitution degree of sulfate groups shows the biggest impact on both the anticoagulant activity and the cell proliferation. Among them, C-2 of 3,6-anhydro-α-d-Galp...

article

On Population Size Estimators in the Poisson Mixture Model

Chang Xuan Mao, Nan Yang, Jinhua Zhong

Biometrics > 69 > 3 > 758 - 765

Estimating population sizes via capture–recapture experiments has enormous applications. The Poisson mixture model can be adopted for those applications with a single list in which individuals appear one or more times. We compare several nonparametric estimators, including the Chao estimator, the Zelterman estimator, two jackknife estimators and the bootstrap estimator. The target parameter of the...

article

Addition of dexmedetomidine to ropivacaine improves cervical plexus block

Yu-Nan Lin, Qiang Li, Rui-Min Yang, Zhong-Xuan Mao, more

Acta Anaesthesiologica Taiwanica > 2013 > 51 > 2 > 63-66

To investigate the sensory block onset time, duration time, and side effects of adding dexmedetomidine to ropivacaine for cervical plexus block.Forty American Society of Anesthesiologists (ASA) Class I or II adult patients who were scheduled to undergo thyroid surgery were randomly allocated to the following groups to receive cervical plexus block: 30 mL of 0.375% ropivacaine combined with 1 μg kg...

article

Simultaneous Confidence Inference on Species Accumulation Curves

Jun Li, Chang Xuan Mao

Journal of Agricultural, Biological and Environmental Statistics > 2012 > 17 > 1 > 1-14

A species accumulation curve is a useful tool in ecology. We construct a simultaneous confidence band for a single species accumulation curve, as an improvement over the existing point-wise confidence band. We also construct a simultaneous confidence band for the difference between two species accumulation curves, as a graphical procedure used to compare two species assemblages. A bootstrap-based...

article

Preparation of agarose sulfate and its antithrombogenicity

Youping Jie, Lingmin Zhang, Peng Chen, Xuan Mao, more

Journal of Wuhan University of Technology-Mater. Sci. Ed. > 2012 > 27 > 1 > 110-114

As one of the seaweed polysaccharide, agarose has received much attention because of its biocompatibility. However, its application in biomedical field was limited with its biological inertia. Modification with some functional groups is needed to obtain agarose derivatives with biological activity and expand its applications. Consequently, agarose was sulfated with chlorosulfonic acid-pyridine with...

chapter

Surface Roughness of Agarose Acetate Membrane and Its Biocompatibility

Peng Chen, Zhijian Yuan, Lingling You, Lingmin Zhang, more

2011 5th International Conference on Bioinformatics and Biomedical Engineering > 1 - 4

2011 5th International Conference on Bioinformatics and Biomedical Engineering (iCBBE)

article

Synthesis of agarose‐graft‐hyaluronan copolymer and its potential application as a peptide carrier

Jian‐Yan Huang, Lei Bao, Xuan Mao, Shun‐Qing Tang

Journal of Applied Polymer Science > 117 > 6 > 3568 - 3574

A novel water‐soluble copolymer, agarose‐graft‐hyaluronan (Ag‐g‐HA), was synthesized as a peptide carrier, and selected properties were evaluated. In brief, agarose was degraded by hydrogen peroxide to achieve agarose with a low gelling temperature and a low molecular weight, activated by epichlorohydrin, and grafted with hyaluronic acid. The IR spectrum results of the Ag‐g‐HA copolymer showed that...

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INFONA - science communication portal

Search results for: Xuan Mao

Photonic Routers: Multimode Interference Induced Optical Routing in an Optical Microcavity (Ann. Phys. 5/2021)

Multimode Interference Induced Optical Routing in an Optical Microcavity

A numerical study on chloride diffusion in freeze-thaw affected concrete

Sintering kinetics of disperse ultrafine equiaxed α-Al2O3 nanoparticles

Petersen estimator, Chapman adjustment, list effects, and heterogeneity

Sintering of α-Al2O3 nanocrystalline ceramic from large α-Al2O3 polycrystalline nanoparticles

Dual responsive zein hydrogel membrane with selective protein adsorption and sustained release property

Selective Corrosion Preparation and Sintering of Disperse α‐Al₂O₃ Nanoparticles

Estimating population sizes with the Rasch model

A Population-Size Model for Protein Spot Detection in Proteomic Studies

On the Chao and Zelterman estimators in a binomial mixture model

On the Residual Plot in a Mixture Model

Influence of gelling properties on protein imprinted agarose gel membrane

Effects of sulfate group in red seaweed polysaccharides on anticoagulant activity and cytotoxicity

On Population Size Estimators in the Poisson Mixture Model

Addition of dexmedetomidine to ropivacaine improves cervical plexus block

Simultaneous Confidence Inference on Species Accumulation Curves

Preparation of agarose sulfate and its antithrombogenicity

Surface Roughness of Agarose Acetate Membrane and Its Biocompatibility

Synthesis of agarose‐graft‐hyaluronan copolymer and its potential application as a peptide carrier

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