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The resolution dimensions with respect to balanced pairs in the recollement of abelian categories
Xuerong Fu,Yonggang Hu,Hailou Yao 대한수학회 2019 대한수학회지 Vol.56 No.4
In this paper we study recollements of abelian categories and balanced pairs. The main results are: recollements induce new balanced pairs from the middle category; the resolution dimensions are bounded under certain conditions. As an application, the resolution dimensions with respect to cotilting objects of abelian categories involved in recollements are recovered.
Measuring the Corporate Performance of Intellectual Capotal
Xuerong Wang,Li Liu,Zhonhyuan Que,Bin Wang 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
Intellectual capital is increasingly being recognized as a driving force for the prosperity of economy and corporations. This paper applies the value-added intellectual coefficient (VAIC) model to investigate the link between components of intellectual capital and corporate performance in three industry sectors in China. We find that (1) the material capital employed efficiency has a positive effect on performance in both manufacturing and real estate sector; (2) the human capital efficiency has a positive effect on performance in the manufacturing sector but not in the real estate or the IT sectors; (3)the structure capital efficiency has non-significant effect on performance in any of the three industry sectors.
A note on exponential almost sure stability of stochastic differential equation
Xuerong Mao,Qingshuo Song,Dichuan Yang 대한수학회 2014 대한수학회보 Vol.51 No.1
Our goal is to relax a sufficient condition for the exponential almost sure stability of a certain class of stochastic differential equations. Compared to the existing theory, we prove the almost sure stability, replacing Lipschitz continuity and linear growth conditions by the existence of a strong solution of the underlying stochastic differential equation. This result is extendable for the regime-switching system. An explicit example is provided for the illustration purpose.
THE RESOLUTION DIMENSIONS WITH RESPECT TO BALANCED PAIRS IN THE RECOLLEMENT OF ABELIAN CATEGORIES
Fu, Xuerong,Hu, Yonggang,Yao, Hailou Korean Mathematical Society 2019 대한수학회지 Vol.56 No.4
In this paper we study recollements of abelian categories and balanced pairs. The main results are: recollements induce new balanced pairs from the middle category; the resolution dimensions are bounded under certain conditions. As an application, the resolution dimensions with respect to cotilting objects of abelian categories involved in recollements are recovered.
A NOTE ON EXPONENTIAL ALMOST SURE STABILITY OF STOCHASTIC DIFFERENTIAL EQUATION
Mao, Xuerong,Song, Qingshuo,Yang, Dichuan Korean Mathematical Society 2014 대한수학회보 Vol.51 No.1
Our goal is to relax a sufficient condition for the exponential almost sure stability of a certain class of stochastic differential equations. Compared to the existing theory, we prove the almost sure stability, replacing Lipschitz continuity and linear growth conditions by the existence of a strong solution of the underlying stochastic differential equation. This result is extendable for the regime-switching system. An explicit example is provided for the illustration purpose.
Ye Xuerong,Deng Jie,Wang Yingqi,Zhai Guofu 한국자기학회 2014 Journal of Magnetics Vol.19 No.4
Optimization design and robust design are significant measures for improving the performance and reliability of electromagnetic devices (EMDs, specifically refer to relays, contactors in this paper). However, the implementation of the above-mentioned design requires substantial calculation; consequently, on the premise of guaranteeing precision, how to improve the calculation speed is a problem that needs to be solved. This paper proposes a new method for establishing an approximate model for the EMD. It builds a relationship between the input and output of the EMD with different coil voltages and air gaps, by using a user-defined interpolating function. The coefficient of the fitting function is determined based on a quantum particle swarm optimization (QPSO) method. The effectiveness of the method proposed in this paper is verified by the electromagnetic force calculation results of an electromagnetic relay with permanent magnet.
Renbin Sun,Jiangfei Lou,Xuerong Fan,Weidong Gao,Zhengbiao Gu 한국섬유공학회 2023 Fibers and polymers Vol.24 No.12
Metal ion mordants are commonly used in the process of dyeing natural fabrics, such as cotton, wool, and silk, to improve their color fastness, but the use of metal salts results in toxic metal wastes which can harm the environment and are costly to process. This study investigated the dyeing and functionalization of wool fabrics with Alizarin Red S (ARS), catalyzed by horseradish peroxidase (HRP) and H2O2, as well as the polymerization mechanism of the ARS/HRP-H2O2 system and possible covalent conjugation mechanisms with wool fiber proteins. The dyeing process was optimized by determining the effects of HRP and ARS dosages, reaction temperature, and reaction time on ARS dyeing performance, as well as the color fastness and antibacterial properties of the resulting dyed fabrics. The HRP and H2O2 catalyzed polymerization of ARS and covalent attachment of the polymers to the wool fibers resulted in dyed fabrics with high color fastness; the rubbing and washing fastness were both 4–5. The antibacterial properties of dyed wool fabrics were excellent, achieving 92.3% growth inhibition of Escherichia coli. Therefore, the HRP-H2O2 system has great potential to replace metal mordants in the dyeing process of natural fibers and reduce the production of toxic wastes by this industry.
The Value-relevance of Accounting Information for Business Combinations
Liu Lina,Wang Xuerong 한중경제문화학회 2014 한중경제문화연구 Vol.3 No.-
To study the value-relevance of accounting information for business combinations in Chinese capital market, this paper uses Ohlson(1995) residual income valuation model to empirically examine the correlation among the enterprise stock price, consolidated earnings, consolidated book values, goodwill and earnings of combined party that have been realized prior to the combination. Empirical results show that the value-relevance of accounting information for purchase combinations is higher than that for pooling combinations, and accounting method employed is one of the important reasons. Furthermore, we put forward some corresponding policy recommendations to improve the value-relevance of accounting information for pooling combinations.
Laccase-catalyzed Polymerization of Aniline with Different Soft Templates
Ya Zhang,Qiang Wang,Xuerong Fan 한국고분자학회 2018 폴리머 Vol.42 No.2
A comparison of laccase-catalyzed polymerization of aniline in the presence of two different “soft” templates - micelle forming surfactant sodium dodecylbenzenesulfonate (SDBS) and sulfonated natural polyelectrolyte calcium lignosulfonate (LGS) - was investigated to check the influences of different templates on the kinetics of the polymerization and on the characteristics of the complexes obtained. Under respective optimal conditions, pH 4.5 for SDBS and pH 3.5 for LGS, the reaction with LGS was much slower than that in SDBS emulsion. The conditions for laccase-catalyzed synthesis of emeraldine salt of polyaniline (PANI-ES) in both cases were optimized using UV-vis spectroscopy. It was found that PANI-ES obtained with LGS template had a higher degree of oxidation with a higher amount of benzene rings than PANI-ES obtained in SDBS emulsion. Since the protonation of PANI occurred on its imine sites, the doping effect of LGS-doped PANI-ES, confirmed by XPS, was thus better than that of SDBS-doped one.
Na-won Baek,Xuerong Fan,Li Dai,Lin Zhang,Jiugang Yuan 한국섬유공학회 2022 Fibers and polymers Vol.23 No.12
The use of natural plants for dyeing is a new green approach in the textile industry using eco-friendly, renewable,and non-toxic reductants for dyeing fabric. Recently, various templates have been reported to enhance the polymerization ofnatural phenols. In this paper, ferulic acid (FA) was synthesized using a new approach and arranged on poly(ethylene glycol)(PEG) templates using horseradish peroxide (HRP)-catalyzed oxidative polymerization. The polymerization mechanism wasstudied in detail using high-performance liquid chromatography-electrospray ionization mass spectrometry (HPLC-ESI-MS)analysis. In addition, the template effect of PEG on 13 natural phenols was also investigated. Upon analyzing the color depth,the K/S value of the silk fabric dyed using PEG as a template was significantly higher than that in the absence of PEG. Thehigher color depth of the poly(ferulic acid)/PEG-treated silk fabrics further validated the important role of PEG as a template. This study presents an environmentally friendly method for dyeing silk fabric under mild conditions and the polymerizationmechanism. Compared to chemical polymerization reactions, this enzyme (HRP)-based synthesis is more environmentallyfriendly due to its milder reaction conditions.