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New Active Organic Substance in Oyster Shell Capable of Scavenging Oxygen Free Radicals with High Efficiency

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Chemical Research in Chinese Universities 2008年第2期24卷 171-174页

作者： ma Jian-hua College of Biology Engineering Jimei University Xiamen 361021 P. R. China

A light purple organic active substance capable of scavenging hydroxyl radical（OH） with a high efficiency was extracted from Oyster shell at an extraction rate of 2.49%. It was found for the first time that this active substance may scavenge OH with the efficiency far higher than that of vitamin C. This active substance may scavenge also superoxide radical（O2） although the scavenging efficiency is far lower than that of vitamin C. Infrared spectrometry and routine chemical analysis primarily reveal that this active substance belongs to glycoprotein.

关键词： Oyster shell Glycoprotein Scavenging Hydroxyl radical Superoxide radical

Analytical solutions and rogue waves in （3＋1）-dimensional nonlinear SchrSdinger equation

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Chinese Physics B 2012年第3期21卷 138-144页

作者： ma Zheng-Yi ma Song-hua College of mathematics and Physics Zhejiang Lishui University Lishui 323000 China

Analytical solutions in terms of rational-like functions are presented for a （3＋1）-dimensional nonlinear Schrodinger equation with time-varying coefficients and a harmonica potential using the similarity transformation and a direct ansatz. Several free functions of time t are involved to generate abundant wave structures. Three types of elementary functions are chosen to exhibit the corresponding nonlinear rogue wave propagations.

关键词： nonlinear SchrSdinger equation similarity transformation rational-like solution rogue wave

FLOW REGIMES BELOW AERATORS FOR DISCHARGE TUNNELS

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Journal of Hydrodynamics 2012年第3期24卷 378-382页

作者： ma Fei WU Jian-hua College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

The flow regimes below an aerator influence directly the air entrainment and the cavitation damage control. Based on the theoretical considerations, the experiments of the aerator for a discharge tunnel were conducted, and the relationships between the flow regime and hydraulic and geometric parameters were investigated. The results showed that, there are two kinds of threshold values for the flow regime conversions. One is Fr1-2 standing for the conversion from the fully filled cavity to the partially filled cavity, and the other is Fr2-3 which shows the change from the partially filled cavity to the net air cavity. Two empirical expressions were obtained for the conversions of the flow regimes, which can be used in the designs of the aerators.

关键词： aerator discharge tunnel flow regime filling water jet length

Trustworthy Service Selection Integrating Cloud Model and Possibility Degree Ranking of Interval Numbers

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Chinese Journal of Electronics 2017年第6期26卷 1177-1183页

作者： ma hua HU Zhigang CAI Meiling School of Software Central South University Computer Education Department Hunan Normal University

It has been challenging to select suitable services from abundant candidates in cloud *** to the characteristics of batch computing mode and stream computing mode, a novel trustworthy service selection approach is proposed integrating cloud model and interval numbers theory. To facilitate potential users to understand the quality of service, the trustworthiness of service is described with interval number using reverse cloud generator, and the services with poor performance are filtered out by employing deviation degree or proximity degree. Two formulas of possibility degree of interval numbers are designed to compare the trustworthiness values between cloud services by utilizing probability zone analysis and geometrical analysis respectively, and the ranking method for possibility degree of interval numbers is exploited to select the most trustworthy service. The experiments show that this approach is effective to improve the accuracy of service selection and select trustworthy service for potential users in cloud paradigm.

关键词： Service selection Trustworthiness Cloud model Possibility degree ranking Interval numbers

CDM: Content Diffusion Model for Information-Centric Networks

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Journal of Computer Science & Technology 2021年第6期36卷 1431-1451页

作者： Bo Chen Liang Liu hua-Dong ma Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and TelecommunicationsBeijing 100876China School of Computer Science Beijing University of Posts and TelecommunicationsBeijing 100876China

This paper proposes the Content Diffusion Model(CDM)for modeling the content diffusion process in information-centric networking(ICN).CDM is inspired by the epidemic model and it provides a method of theoretical quantitative analysis for the content diffusion process in ***,CDM introduces the key functions to formalize the key factors that influence the content diffusion process,and thus it can construct the model via a simple but efficient ***,we derive CDM by using different combinations of those key factors and put them into several typical ICN scenarios,to analyze the characteristics during the diffusion process such as diffusion speed,diffusion scope,average fetching hops,changing and final state,which can greatly help to analyze the network performance and application design.A series of experiments are conducted to evaluate the efficacy and accuracy of *** results show that CDM can accurately illustrate and model the content diffusion process in ICN.

关键词： information-centric networking content diffusion modeling

Some Class 1 Graphs on gc-colorings

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Acta mathematica Sinica,English Series 2016年第10期32卷 1237-1245页

作者： hua Wen ma Xia ZHANG School of mathematical Sciences Shandong Normal UniversityJi'nan 250014P·R·China

An edge-coloring of a graph G is an coloring of a graph G is an edge-coloring of G such assignment of colors to all the edges of G. A go- that each color appears at each vertex at least g（v） times. The maximum integer k such that G has a go-coloring with k colors is called the gc-chromatic index of G and denoted by X＇gc （G）. In this paper, we extend a result on edge-covering coloring of Zhang X＇gc（） = δg（G）, and Liu in 2011, and give a new sufficient condition for a simple graph G to satisfy ＇ x＇gc（G）=δg（G）,where δg（G）=minv∈V（G）{[d（v）/g（v）]}.

关键词： Edge-coloring go-coloring go-chromatic index edge covering classification problem

Curcumin Reduces Cardiac Fibrosis by Inhibiting Myofibroblast Differentiation and Decreasing Transforming Growth Factor β1 and matrix Metalloproteinase 9/Tissue Inhibitor of Metalloproteinase 1

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Chinese Journal of Integrative Medicine 2017年第5期23卷 362-369页

作者： ma Jin ma Shi-yu DING Chun-hua Cardiac Electrophysiology Research Lab Guangdong Provincial Academy of Chinese Medical Sciences Guangzhou 510006 China Department of Critical Care Medicine Guangdong Provincial Hospital of Chinese Medicine Guangzhou 510006 China Arrhythmia Center Guangdong Provincial Hospital of Chinese Medicine Guangzhou 510006 China

Objective： To study the effect of curcumin on fibroblasts in rats with cardiac fibrosis. Methods： The rats were randomly divided into 4 groups（n=12 in each group）： the normal control, isoproterenol（ISO）, ISO combined with low-dose curcumin（ISO＋Cur-L）, and ISO combined with high-dose curcumin（ISO＋Cur-H） groups. ISO＋Cur-L and ISO＋Cur-H groups were treated with curcumin（150 or 300 mg·kg-1·day-1） for 28 days. The primary culture of rat cardiac fibroblast was processed by trypsin digestion method in vitro. The 3rd to 5th generation were used for experiment. Western blot method was used to test the expression of collagen type Ⅰ/Ⅲ, α-smooth muscle actin（α-Sma）, transforming growth factor（TGF）-β1, matrix metalloproteinase（MMP）-9 and tissue inhibitor of metalloproteinase（TIMP）-1. 3-（4,5-Dimethylthiazol-2-yl）-2,5-diphenyltetr-azolium bromide（MTT） assay was applied to test the proliferation of fibroblast. Result： Curcumin significantly decreased interstitial and perivascular myocardial collagen deposition and cardiac weight index with reducing protein expression of collagen type Ⅰ/Ⅲ in hearts（P〈0.05）. In addition, curcumin directly inhibited angiotensin（Ang） Ⅱ-induced fibroblast proliferation and collagen type Ⅰ/Ⅲ expression in cardiac fibroblasts（P〈0.05）. Curcumin also inhibited fibrosis by inhibiting myofibroblast differentiation, decreased TGF-β1, MMP-9 and TIMP-1 expression（P〈0.05） but had no effects on Smad3 in Ang Ⅱ incubated cardiac fibroblasts. Conclusions： Curcumin reduces cardiac fibrosis in rats and Ang Ⅱ-induced fibroblast proliferation by inhibiting myofibroblast differentiation, decreasing collagen synthesis and accelerating collagen degradation through reduction of TGF-β1, MMPs/TIMPs. The present findings also provided novel insights into the role of curcumin as an anti-fibrotic agent for the treatment of cardiac fibrosis.

关键词： curcumin fibrosis myofibroblast transforming growth factor matrix metalloproteinase

Distributed anonymous data perturbation method for privacy-preserving data mining

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第7期10卷 952-963页

作者： Feng LI Jin ma Jian-hua LI School of Electronic Information and Electrieal Engineering Shanghai Jiao Tong University Shanghai 200030 China

Privacy is a critical requirement in distributed data mining. Cryptography-based secure multiparty computation is a main approach for privacy preserving. However, it shows poor performance in large scale distributed systems. Meanwhile, data perturbation techniques are comparatively efficient but are mainly used in centralized privacy-preserving data mining (PPDM). In this paper, we propose a light-weight anonymous data perturbation method for efficient privacy preserving in distributed data mining. We first define the privacy constraints for data perturbation based PPDM in a semi-honest distributed environment. Two protocols are proposed to address these constraints and protect data statistics and the randomization process against collusion attacks: the adaptive privacy-preserving summary protocol and the anonymous exchange protocol. Finally, a distributed data perturbation framework based on these protocols is proposed to realize distributed PPDM. Experiment results show that our approach achieves a high security level and is very efficient in a large scale distributed environment.

关键词： Privacy-preserving data mining (PPDM) Distributed data mining Data perturbation

Inception point of air entrainment over stepped spillways

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Journal of Hydrodynamics 2013年第1期25卷 91-96页

作者： WU Jian-hua ZHANG Bin ma Fei College of Water Conservancy and Hydropower Engineering Hohai University

The location of the inception point of the air entrainment directly affects the energy dissipation ratio, the cavitation damage control, and the training wall height designs for a stepped spillway and a stilling basin. In this paper, the boundary layer theory of plates is used to predict the location of the inception point of the air entrainment over the stepped spillways by assuming the steps on the spillways as a kind of roughness. An empirical formula is presented based on the physical model experiments, with the maximum error less than 1% except at one point where the error is 1.6%, as compared to the experimental data. Meanwhile, it is shown that the location of the inception point of the air entrainment for the stepped spillway is much nearer to the top of the spillway than that for a smooth spillways, which explains why the high ratio of the energy dissipation is provided for the stepped spillway.

关键词： air entrainment cavitation energy dissipation inception point stepped spillway unit discharge