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Qiaoling Xue,Wenjun Liu 한국전산응용수학회 2008 Journal of applied mathematics & informatics Vol.26 No.5
In this paper, by introducing a parameter, we establish a new Ostrowski’s integral inequality which generalizes the result of [5]. Finally,we apply the new Ostrowski’s inequality to numerical integration and special means.
Xue, Qiaoling,Liu, Wenjun,Zhang, Wei Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.5
In this paper, by introducing a parameter, we establish a new Ostrowski's integral inequality which generalizes the result of [5]. Finally, we apply the new Ostrowski's inequality to numerical integration and special means.
Zhu Wenli,Yang Qiaoling,Du Juan,Yin Pinpin,Yi Jun,Liu Yanmei,Wu Xuemei,Zhang Zhongyi 한국물리학회 2022 Current Applied Physics Vol.39 No.-
A quaternary CuO–CuS–ZnO–ZnS nanocomposite was successfully synthesized via a facile microwave irradiation based on the preprepared ZnS and CuO nanoparticles. CuO–CuS–ZnO–ZnS nanocomposite was a porous photocatalyst, providing excellent adsorption performance. It was sensitive to both ultraviolet and visible light, moreover, the photoelectrochemical measurements confirmed that there was a high separation rate and low recombination rate of photo-generated charge carriers in the nanocomposite, endowing excellent photocatalytic activity in the sunlight. Under the simulated solar light irradiation, the removal efficiency of rhodamine B (RhB) pollutant (30 mg/L) over CuO–CuS–ZnO–ZnS nanocomposite was 33.98 and 2.90 times of pristine CuO and ZnS, respectively. The outstandingt photocatalytic performance was attributed to Z-scheme charge transfer path.
Investigation of the interstitial oxygen behaviors in vanadium alloy: A first-principles study
Xingming Zhang,Yifan Li,Qiaoling He,Ruilian Li,Lei Deng,Liang Wang,Xunlin Liu,Jianfeng Tang,Huiqiu Deng,Wang-Yu Hu 한국물리학회 2018 Current Applied Physics Vol.18 No.2
This study aims at characterizing the interstitial Oxygen (O) behaviors in the Vanadium (V) Alloy by means of the first-principles calculations. For this, the interations between vacancy (Vac) and O interstitil atom are studied in detail to obtain the binding energies and stable structures of the complexes. It can be seen that monovacancy binding with two O atoms occupied the opposing octahedral stie are particularly stable, and is liable to form VacO2 cluster in the V alloys. According to the mass action analysis, the predicted temperature dependence of the concentration for VacOn complexes are presented. Apart from monovacancy, we also consider the trapping behavior of vacancy cluster on the O atoms. The results also prove that one vacancy can trap two O atoms in the V alloys. Based the diffusion theory, we obtain the diffusion coefficients as a function of temperature with or without the vacancy effect in the V alloys. The predicted O diffusion coefficients in defect-free V alloys from our first-principles calculations are in excellent ageement with the experimental data, meanings that the vacancy-limited mechanism does not play the key role for O diffusion in V alloys. Regarding the interactions between vacancy, solutes and O atom, combining with the diffusion barriers of O affected by vacancy and solute, we infer the formation mechanism of the precipitates in the V alloys.
Yan Bao,Jiajia Guo,Jianzhong Ma,Pan Liu,Qiaoling Kang,Jing Zhang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
A series of cationic silicon-based gemini surfactants (Cm-PSi-Cm) having different hydrophobic chains length (m = 8,10,12,14,16,18) were synthesized. Subsequently, surface parameters including equilibrium surface tension (gCMC), critical micelle concentration (CMC), surface pressure at CMC (PCMC) and maximum surface excess (Gmax) were calculated according to the surface tension measurements. The importance of hydrophobic chains length on the surface activity of Cm-PSi-Cm was revealed in detail. With the increasing hydrophobic chains length, the equilibrium surface tension (gCMC) values follow the order of C8-PSi-C8 > C10-PSi-C10 > C12-PSi-C12< C14-PSi-C14< C16-PSi-C16< C18-PSi-C18. The thermodynamic parameters of micellization process, namely, standard Gibbs free energy (DG0 m), enthalpy (DH0 m) and entropy (DS0 m), were derived from conductivity measurements at different temperatures. The aggregation of the cationic silicon-based gemini surfactants (C12-PSi-C12) in aqueous solution at different concentrations was studied by DLS and TEM measurements. The formation of micelles and vesicles in C12-PSi-C12 solutions was observed at a concentration well above the CMC. Moreover, the morphology of vesicles changed from sphere to rod-like, dumbble-like and finally string dumbbell-like with the increasing of the surfactant concentration.
Reliability-based sensitivity of mechanical components with arbitrary distribution parameters
Yimin Zhang,Xiangdong He,Zhou Yang,Qiaoling Liu,Bangchun Wen 대한기계학회 2010 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.24 No.6
This paper presents a reliability-based sensitivity method for mechanical components with arbitrary distribution parameters. Techniques from the perturbation method, the Edgeworth series, the reliability-based design theory, and the sensitivity analysis approach were employed directly to calculate the reliability-based sensitivity of mechanical components on the condition that the first four moments of the original random variables are known. The reliability-based sensitivity information of the mechanical components can be accurately and quickly obtained using a practical computer program. The effects of the design parameters on the reliability of mechanical components were studied. The method presented in this paper provides the theoretic basis for the reliability-based design of mechanical components.
Flow Velocity Deviation of Spinning Solution Under Multi-field Coupling
Zhiming Zhang,Da Hong,Xinyu Huang,Kang Liu,Qiao Xu,Zhen Chen,Qiaoling Ji,Changjin Ke 한국섬유공학회 2023 Fibers and polymers Vol.24 No.10
Rotating jet spinning uses the centrifugal force generated by the high-speed rotation of the motor to keep the spinning solution ejected from the nozzle to form nanofibers. At present, the research work on rotating jet spinning mainly involves the materials, properties and applications of fibers, parameter influence and jet trajectory, while there are few studies on the optimization of spinning core components. In this paper, by analyzing the force and flow state of spinning solution in the flow channel of spinning nozzle, it is found that the maximum velocity region of spinning solution will be offset. The reason for this phenomenon is that the spinning solution is subjected to Coriolis force in the rotating system, resulting in the secondary flow of solution. The relationship between nozzle parameters, solution parameters as well as process parameters, and the outlet velocity of solution was sought, and the structure of spinning nozzle was optimized. The factors affecting velocity offset in straight-tube nozzles and bent-tube nozzles are simulated. High-speed centrifugal spinning experiments were conducted using both unoptimized and optimized nozzles.