作者：
Song, Ying-Qing;Javid, Khurram;Khan, Sami Ullah;Khan, M. Ijaz;Sun, Tian-Chuan;...
期刊：
EUROPEAN PHYSICAL JOURNAL PLUS,2021年136(6):1-17 ISSN：2190-5444
通讯作者：
Sun, T.-C.;Khan, M.I.
作者机构：
[Song, Ying-Qing] Hunan City Univ, Sch Sci, Yiyang 413000, Peoples R China.;[Javid, Khurram] Northern Univ, Dept Math, Wattar Wallai Rd, Nowshera 24110, Pakistan.;[Khan, Sami Ullah] COMSATS Univ Islamabad, Dept Math, Sahiwal 57000, Pakistan.;[Khan, M. Ijaz] Riphah Int Univ, Dept Math & Stat, I-14, Islamabad 44000, Pakistan.;[Sun, Tian-Chuan] Huzhou Univ, Qiuzhen Coll, Huzhou 313000, Peoples R China.
通讯机构：
[Tian-Chuan Sun] Q;[M. Imran Khan] C;Qiuzhen College, Huzhou University, Huzhou, People’s Republic of China<&wdkj&>CECOS University of IT and Emerging Sciences, Peshawar, Pakistan
摘要：
Motivated by bio-chemical systems and ciliated propulsion, we consider the steady laminar flow from a non-uniform wavy channel adjacent to a saturated porous medium which has been investigated analytically using an integration technique. A highly permeability domain is considered. We employed a sinusoidal complex wavy relation for the ciliated walls. A mathematical relation was used to convert the rheological equations from
$$\big(\bar{X},\bar{\xi }\big)$$
coordinate system to a
$$\big(\bar{x},\bar{\xi }\big)$$
dimensionless system. These rheological equations are simplified under two biological assumptions, one is creeping phenomena, and the second one is long-wavelength approximation. The solution of governing equations is obtained through Mathematica software 10.0 with the help of integration technique in a wave frame. The impacts of embedded hydro-mechanical parameters on the rheological features are studied. The boundary layer phenomena are obtained in the velocity profile under larger magnetic and porosity effects. The magnitude of pressure gradient is reduced under larger strength of magnetic and porosity effects. The cilia length parameter has a dynamic role in enhancement of the pressure gradient. The larger strength of the thermophoretic parameter has remarkable effects in augmentation of volumetric fraction, heat and mass transfer phenomena. The outcomes of current investigation are applicable in energy systems, manufacturing of ciliated micro-pumps, petroleum engineering, thermal augmentation of physiological and chemical fluids, and industrial magnetic materials processing.
期刊：
Journal of Materials Science: Materials in Electronics,2021年32(1):745-751 ISSN：0957-4522
通讯作者：
Zhang, Zhengzhong;Tan, Weishi
作者机构：
[Liu, Hao; Zhang, Zhengzhong] Huaiyin Inst Technol, Fac Appl Technol, Huaian 223003, Peoples R China.;[Wang, Ya] Shanghai Urban Construct Vocat Coll, Shanghai 201415, Peoples R China.;[Dong, Liming] Changshu Inst Technol, Sch Automat Engn, Changshu 215500, Jiangsu, Peoples R China.;[Wang, Haiou] Hangzhou Dianzi Univ, Inst Mat Phys, Hangzhou 310018, Peoples R China.;[Zhang, Yun] Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Peoples R China.
通讯机构：
[Zhang, Zhengzhong; Tan, Weishi] H;Huaiyin Inst Technol, Fac Appl Technol, Huaian 223003, Peoples R China.;Hunan City Univ, All Solid State Energy Storage Mat & Devices Key, Coll Commun & Elect Engn, Yiyang 413002, Peoples R China.
摘要：
For the first time, alternating trilinear decomposition-assisted multivariate curve resolution (ATLD-MCR) was applied to analyse complex gas chromatography-mass spectrometric (GC-MS) data with severe baseline drifts, serious co-elution peaks and slight retention time shifts for the simultaneous identification and quantification of polycyclic aromatic hydrocarbons (PAHs) in aerosols. It was also compared with the classic multivariate curve resolution-alternating least-squares (MCR-ALS) and the GC-MS-based external standard method. In validation samples, average recoveries of five PAHs were within the range from (96.2 +/- 6.8)% to (106.5 +/- 4.1)% for ATLD-MCR, near to the results of MCR-ALS ((98.0 +/- 1.5)% to (106.7 +/- 4.3)%). In aerosol samples, the concentrations of pyrene provided by ATLD-MCR were not significantly different from those of MCR-ALS. The other four PAHs including chrysene, benzo[a]anthracene, fluoranthene and benzo[b]fluoranthene were not detected by ATLD-MCR and the GC-MS-based external standard method. The results of figures of merit further demonstrated that ATLD-MCR achieved high sensitivities (8.9 x 10(4) to 1.7 x 10(6) mAU ml mu g(-1)) and low limits of detection (0.003 to 0.087 mu g ml(-1)), which were better than or similar to MCR-ALS, presenting a great choice to deal with complex GC-MS data for the simultaneous determination of targeted PAHs in aerosols.
摘要：
With the rapid development of urbanization, substantial land areas and houses are expropriated, which can cause huge numbers of disputes related to expropriation compensation. The root of the disputes is that the associated subjects are affected by various behavioral preferences and make different cognitive fairness judgments based on the same compensation price. However, the existing expropriation compensation strategies based on the market value under the assumption of "the economic man" hypothesis cannot meet the fairness preference demands of the expropriated. Therefore, finding a compensation price that satisfies subjects' multidimensional fairness preferences, including profit-seeking, loss aversion, and interactive fairness preferences, is necessary. Only in this way can the subjects reach an agreement regarding fair compensation and resolve their disputes. Because of the fuzziness of subjects' expected revenues, this paper innovatively introduces trigonometric intuitional fuzzy numbers to construct one-dimensional and multidimensional fair fuzzy equilibrium evaluation models. The Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method is adopted to convert a multidimensional problem into a multiattribute group decision problem, which simplifies the problem of finding multidimensional equilibrium when considering the multidimensional fairness preferences of the two subjects. Real case data are introduced to verify the validity of this method. The research results show that upward revision of the multidimensional fairness preferences based on the market value assists in achieving a fair compensation agreement. Consideration of the influence of the subjects' multidimensional fairness preferences on the fairness equilibrium is conducive to resolving the disputes, and provides a reference for the settlement of expropriation compensation disputes in developing countries.
摘要：
Against the backdrop of emerging markets and the transitional society, the large-scale start-up of real estate development projects has brought about rapid economic growth and accelerated urban expansion, followed by extreme disputes between social groups. This paper aims to effectively solve the real dilemma of urban housing expropriation by obtaining a consensus regarding the fairness of compensation standards among expropriation compensation-related subjects. Three behavioral preferences—profit-seeking fairness, loss aversion and interactive fairness—were added to a multidimensional fairness equilibrium evaluation indicator system of urban housing expropriation compensation. The entropy method was used to calculate their weights. A multidimensional fairness game model and a multidimensional fairness equilibrium evaluation method based on compromise multi-criteria decision-making VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) of urban housing expropriation compensation were constructed to combine different strategic schemes of related subjects for the purpose of obtaining the compromise optimal solution, that is, the multidimensional fairness game equilibrium solution. The stability of the multidimensional fairness game model and the objectivity of the multidimensional fairness equilibrium evaluation were tested and verified through case data analysis and sensitivity analysis. The conclusion is drawn that the multidimensional fairness game equilibrium solution can effectively resolve extreme disputes regarding urban housing expropriation.
通讯机构：
[Huang Tang ] L;Lecturer, School of Civil Engineering, Hunan City University, Yingyang, Hunan, China;Industry Key Laboratory of Transportation Infrastructure Security Risk Management of Changsha University of Science and Technology, Changsha, Hunan, China (corresponding author: [email protected])
摘要：
The diffusion mechanism for chloride ions in concrete with varying water/cement ratio (w/c) is studied by chloride ion spray testing. A new model of chloride diffusion coefficient, which varies with the ingress depth of chloride ion and w/c, is developed. A spatial time-dependent reliability model of time to corrosion initiation (T-CI) for reinforced concrete (RC) structures is developed, considering spatial variability of geometric, material and environmental parameters. The test results show that the chloride diffusion coefficient increases as w/c increases, and chloride diffusion velocity decreases as penetration depth increases. It is found that the probability of corrosion initiation considering spatial variability is 13.1-18.5% greater than that without consideration of spatial variability. This indicates that neglecting spatial variations in evaluating probability of corrosion initiation time overestimates the structural reliability. It is also found that the probability of corrosion initiation for future climate change is 9-11% higher than that obtained from constant temperature. The mean value of T-CI based on a time-dependent chloride diffusion coefficient is 16.7% less than that obtained for a constant chloride diffusion coefficient. This suggests that it is more appropriate if penetration depth and w/c is considered when determining the time-dependent chloride diffusion coefficient.
摘要：
This paper is to provide experimental evidence of designing and assessing a teacher training program for sustainability competency enhancement in higher education. Eighty-five engineering teachers participated in the program comprising three stages of fifteen days. The first stage focused on the content knowledge of eco-design and how to apply the life cycle assessment (LCA) methods and tools. The second stage aimed at using the four-step LCA method to a power battery eco-design problem. The third stage was to create a general structured eco-design teaching approach for realizing its expansion in various engineering fields. The findings suggested that the participants enhanced their sustainability awareness and eco-design skills, and improved in the four elements of technological pedagogical content knowledge (TPACK) through the program. The analysis on participants' reflective essays indicated that improvement mainly comes from the stages of LCA practice and eco-design integration. This study validates the importance of focusing teacher professional development on sustainability awareness and eco-design skill.
期刊：
JOURNAL OF PHYSICS-CONDENSED MATTER,2021年33(28):285802 ISSN：0953-8984
通讯作者：
Haiou Wang<&wdkj&>Weishi Tan
作者机构：
[Wang, Haiou; Zhang, Hui; Huo, Dexuan; Wang, Yan] Hangzhou Dianzi Univ, Inst Mat Phys, Key Lab Novel Mat Sensor Zhejiang Prov, Hangzhou 310018, Peoples R China.;[Tan, Weishi] Hunan City Univ, Coll Informat & Elect Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang 413002, Peoples R China.;[Tan, Weishi] Nanjing Univ Sci & Technol, Dept Appl Phys, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Peoples R China.
通讯机构：
[Haiou Wang] K;[Weishi Tan] A;Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Institute of Material Physics, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China<&wdkj&>All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang 413002, People's Republic of China<&wdkj&>Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
摘要：
Emergent phenomena at interfaces have been investigated intensely in pursuit of the next generation spintronics. In this work, we have integrated heterostructure consisting of paramagnetic (PM) metallic Pt and antiferromagnetic (AFM) insulator LaMnO(3)(LMO). High-quality Pt (3nm)/LMO (100nm) heterostructure has been obtained by pulsed laser deposition. The structure, lattice strain and magnetic properties of epitaxial Pt/LMO heterostructure are fully studied. Due to the high sensitivity of synchrotron radiation and the high quality of epitaxial layer, the reflection intensity of the 3 nm-thick ultrathin Pt layer and LMO layer can be detected, and then lattice strain can be calculated. The LMO layer is under relative large tensile strain (2.13%), while the Pt layer is under relative small compressive strain (-0.46%). Magnetization measurements suggest that unexpected ferromagnetic behavior is observed clearly in the PM-Pt/AFM-LMO heterostructure. Moreover, spin glass (SG) state and exchange bias (EB) is also observed in this heterostructure. SG state is observed as a result of competing magnetic orders and spin frustration at the Pt/LMO interface. The heterostructure shows the EB effect below blocking temperature (T(B)), which is much lower than the Néel temperature (T(N)) of LMO, suggesting that the EB is strongly related to the SG state. The EB originates from the coupling between the SG and AFM phases.
期刊：
Advances in Mathematical Physics,2021年2021 ISSN：1687-9120
通讯作者：
Ko, Young Chun
作者机构：
[Liu, Yiying] Hunan City Univ, Coll Art, Yiyang 413000, Hunan, Peoples R China.;[Ko, Young Chun] Sehan Univ, Dept Teaching Profess, Chungnam 58447, South Korea.
通讯机构：
[Ko, Young Chun] S;Sehan Univ, Dept Teaching Profess, Chungnam 58447, South Korea.
作者机构：
[Zhou, Shuang-Shuang] Hunan City Univ, Sch Sci, Yiyang 413000, Peoples R China.;[Areshi, Mounirah] Univ Tabuk, Math Dept, Coll Sci, Tabuk 71491, Saudi Arabia.;[Agarwal, Praveen] Anand Int Coll Engn, Dept Math, Jaipur 302022, Rajasthan, India.;[Agarwal, Praveen] Ajman Univ, Nonlinear Dynam Res Ctr NDRC, Ajman 346, U Arab Emirates.;[Shah, Nehad Ali; Chung, Jae Dong] Sejong Univ, Dept Mech Engn, Seoul 05006, South Korea.
通讯机构：
[Kamsing Nonlaopon] T;These authors contributed equally to this work.<&wdkj&>Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand<&wdkj&>Author to whom correspondence should be addressed.
摘要：
In this paper, a novel technique called the Elzaki decomposition method has been using to solve fractional-order multi-dimensional dispersive partial differential equations. Elzaki decomposition method results for both integer and fractional orders are achieved in series form, providing a higher convergence rate to the suggested technique. Illustrative problems are defined to confirm the validity of the current technique. It is also researched that the conclusions of the fractional-order are convergent to an integer-order result. Moreover, the proposed method results are compared with the exact solution of the problems, which has confirmed that approximate solutions are convergent to the exact solution of each problem as the terms of the series increase. The accuracy of the method is examined with the help of some examples. It is shown that the proposed method is found to be reliable, efficient and easy to use for various related problems of applied science.
期刊：
JOURNAL OF MATHEMATICAL INEQUALITIES,2021年15(2):559-573 ISSN：1846-579X
作者机构：
[Wang, Miao-Kun; Hong, Miao-Ying] Huzhou Univ, Dept Math, Huzhou 313000, Peoples R China.;[Chu, Yu-Ming] Hunan City Univ, Coll Sci, Yiyang 413000, Peoples R China.;[Chu, Yu-Ming] Changsha Univ Sci & Technol, Hunan Prov Key Lab Math Modeling & Anal Engn, Changsha 410114, Peoples R China.
关键词：
Generalized trigonometric sine function;generalized inverse trigonometric sine function;power mean;convexity
摘要：
In the article, we present a necessary and sufficient condition such that the one-parameter generalized inverse trigonometric sine function is convex with respect to power mean. As a consequence, we provide the necessary and sufficient condition for the concavity of the one-parameter generalized trigonometric sine function according to power mean.
期刊：
Journal of Energy Storage,2021年40:102774 ISSN：2352-152X
通讯作者：
Wei-Feng Xia<&wdkj&>Davood Toghraie
作者机构：
[Song, Ying-Qing] Hunan City Univ, Sch Sci, Yiyang 413000, Peoples R China.;[Barnoon, Pouya; Kaviyani, Oyan; Toghraie, Davood] Islam Azad Univ, Khomeinishahr Branch, Dept Mech Engn, Khomeinishahr, Iran.;[Xia, Wei-Feng] Huzhou Univ, Sch Engn, Huzhou 313000, Peoples R China.
通讯机构：
[Wei-Feng Xia] S;[Davood Toghraie] D;Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran<&wdkj&>School of Engineering, Huzhou University, Huzhou 313000, P. R. China
摘要：
In this study, the numerical study of fluid flow and heat transfer in peripheral air vaporizers used in cryogenic tanks are studied. The vaporizers under consideration include two simple and non-simple peripheral air vaporizers. The fluid enters the vaporizer (in the liquid phase) which is connected to a cryogenic reservoir and, after heat exchanging, is converted to the gas phase, and exits the vaporizer. Inside the two vaporizers, porous foam is used to fill the entire cross-section of the channel. The k-epsilon realizable model is used for simulation. The Reynolds numbers and the surface temperature vary in the ranges of 2400 <= Re <= 3000 and 280 K <= T-s <= 310 K, respectively. The results show that in all cases, the use of non-simple vaporizer versus simple vaporizer has more satisfactory results in increasing heat transfer. Also, the performance of vaporizers at low surface temperatures leads to a further increase in heat transfer. The presence of porous foam can be considered as an auxiliary factor in increasing heat transfer. In maximum and minimum Reynolds numbers, the percentage increase in convective heat transfer coefficient for surface temperature changes from 300 to 310 K is equal to 15 % and 17 % for the simple vaporizer and 30% and 20% for the non-simple vaporizer, respectively.
期刊：
Mathematical Problems in Engineering,2021年2021 ISSN：1024-123X
通讯作者：
Yi, Chao
作者机构：
[Xu, In] Hunan City Univ, Sch Sports, Yiyang 413000, Hunan, Peoples R China.;[Yi, Chao] Fujian Chuanzheng Commun Coll, Coll Gen Educ, Fuzhou 350007, Fujian, Peoples R China.
通讯机构：
[Yi, Chao] F;Fujian Chuanzheng Commun Coll, Coll Gen Educ, Fuzhou 350007, Fujian, Peoples R China.
摘要：
Cluster regression analysis model is an effective theory for a reasonable and fair player scoring game. It can roughly predict and evaluate the performance of athletes after the game with limited data and provide scientific predictions for the performance of athletes. The purpose of this research is to achieve the player's postmatch scoring through the cluster regression model. Through the research and analysis of past ball games, the comparison and experiment of multiple objects based on different regression analysis theories, the following conclusions are drawn. Different regression models have different standard errors, but if the data in other model categories are put into the centroid model expression, the standard error and the error of the original model are within 0.3, which can replace other models for calculation. In the player's postmatch scoring, although the expert's prediction of the result is very accurate, within the error range of 1 copy, the player's postmatch scoring mechanism based on the cluster regression analysis model is more accurate, and the error formula is in the 0.5 range. It is best to switch the data of the regression model twice to compare the scoring mechanism using different regression experiments.
作者机构：
[Huang, Yi] Hunan City Univ, Sch Mat & Chem Engn, Yiyang 413002, Peoples R China.;[Xiong, Guo] Hunan Hualin Xiangtan Iron & Steel Co Ltd, Xiangtan 411101, Peoples R China.
通讯机构：
[Yi Huang] S;School of Materials and Chemical Engineering, Hunan City University, Yiyang 413002, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
The influence of hydrothermal pretreatment temperature on the hydration products and carbonation efficiency of Al-rich LF slag was investigated. The results showed that the carbonation efficiency was strongly dependent on the morphology of hydration products and the hydration extent of the raw slag. Hydrothermal pretreatment at 20 degrees C or 80 degrees C favored the formation of flake-shaped products with a higher specific surface area and therefore resulted in a higher CO2 uptake of 20 degrees C and 80 degrees C-pretreated slags (13.66 wt% and 10.82 wt%, respectively). However, hydrothermal pretreatment at 40 degrees C, 60 degrees C or 100 degrees C led to the rhombohedral-shaped calcite layer surrounding the unreacted core of the raw slag and the formation of fewer flake-shaped products, resulting in a lower CO2 uptake of 40 degrees C, 60 degrees C and 100 degrees C-pretreated slags (9.21 wt%, 9.83 wt%, and 6.84 wt%, respectively).
