bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multiple nano-filaments based efficient resistive switching in TiO2 nanotubes array influenced by thermally induced self-doping and anatase to rutile phase transformation
Authors: Hazra Arnab , Tripathi Ashutosh , Jan Atif , Kundu Souvik , Boppidi Pavan Kumar Reddy 
Published: December 2020

Abstract
In this paper, the impact of thermally induced self-doping and phase transformation in TiO2 based resistive random-access memory (ReRAM) is discussed. Instead of a thin film, a vertically aligned one-dimensional TiO2 nanotube array (TNTA) was used as a switching element. Anodic oxidation method was employed to synthesize TNTA, which was thermally treated in the air at 350 °C followed by further annealing from 350 °C to 650 °C in argon. Au/TiO2 nanotube/Ti resistive switching devices were fabricated with porous gold (Au) top electrode. The x-ray diffraction results along with Raman spectra evidently demonstrate a change in phase of crystallinity from anatase to rutile, whereas photoluminescence spectra revealed the self-doping level in terms of oxygen vacancies (OV) and Ti interstitials (Tii) as the temperature of thermal treatment gets increased. The electrical characterizations establish the bipolar and electroforming free resistive switching in all the samples. Among those, the ReRAM sample S3 thermally treated at 550 °C displayed the most effective resistive switching properties with R
OFF/R
ON of 102 at a read voltage of −0.6 V and a SET voltage of −2.0 V. Moreover, the S3 sample showed excellent retention performance for over 106 s, where stable R
OFF/R
ON ≈ 107 was maintained throughout the experiment.
Combined effects of surface plasmon coupling and Förster resonance energy transfer on the light color conversion behaviors of colloidal quantum dots on an InGaN/GaN quantum-well nanodisk structure
Authors: Chen Yen-Po , Ni Chia-Chun , Wu Ruei-Nan , Kuo Sheng-Yang , Su Yu-Cheng , Huang Yang-Yi , Chen Jia-Wei , Hsu Yi-Chiao , Wu Shung-Hsiang , Chen Chien-Yu , Wu Ping-Hsiu , Kiang Yean-Woei , Yang C C 
Published: December 2020

Abstract
By forming nanodisk (ND) structures on a blue-emitting InGaN/GaN quantum-well (QW) template, the QWs become close to the red-emitting quantum dots (QDs) and Ag nanoparticles (NPs) attached onto the sidewalls of the NDs such that Förster resonance energy transfer (FRET) and surface plasmon (SP) coupling can occur to enhance the efficiency of blue-to-red color conversion. With a larger ND height, more QWs are exposed to open air on the sidewall for more QD/Ag NP attachment through QD self-assembly and Ag NP drop casting such that the FRET and SP coupling effects, and hence the color conversion efficiency can be enhanced. A stronger FRET process leads to a longer QD photoluminescence (PL) decay time and a shorter QW PL decay time. It is shown that SP coupling can enhance the FRET efficiency.
Electromagnetic properties of the Pc
(4312) pentaquark state
Authors: Özdem Ulaş 
Published: December 2020

Abstract
Using the light-cone QCD sum rules, we evaluate the magnetic moment of the

pentaquark state by considering both the

molecular and diquark-diquark-antiquark state, with quantum numbers

. In the calculations, we use the diquark-diquark-antiquark and molecular form of the interpolating currents for the

pentaquark and the distribution amplitudes of the photon. The numerical results for the magnetic moment obtained using the two different pictures are quite different from each other, which can be used to pin down the underlying structure of

. Any experimental measurement of the magnetic moment in the near future will provide an understanding of the internal structure of this pentaquark state.
XIV International Congress of Electronics and Advanced Technologies
Authors: Pardo García A , Dueñas Ramírez L M , V-Niño E D 
Published: December 2020

The Universidad de Pamplona, Colombia, through its Faculty of Engineering and Architecture, realized the XIV International Congress of Engineering “Electronics and Advanced Technologies” (XIV CIETA), X International Congress on Systems, Informatics, and Knowledge Engineering (CICOM), X International Congress on Telecommunications, IX International Congress on Electrical Engineering, V International Congress of Mechatronics Engineering and II International Congress of Industrial Engineering, Virtual modality in Pamplona, Norte de Santander, Colombia, on October 28, 29 and 30 of the year 2020.
This International Congress “Electronics and Advanced Technologies” is a point of contact between the college students, engineers and researchers as much from the Universidad de Pamplona as from other foreign Universities or of Colombia. The International Congress “Electronics and Advanced Technologies” proposes general and specialized articles and discusses topics such as Physics, Mathematics, Automatic Control, Automatization, Digital signal Processing, Electronics, Electrical treat, Telecommunications, Systems, and areas related to sciences and engineering.
List of Organizing Committee, International Scientific Committee, National Scientific Committee, Local Scientific Committee, Logistics Committee, Sponsor and Partners are available in this pdf.
Mesoporous NiCo2O4 nanoparticles as cathode additive for high-performance lithium sulfur battery
Authors: Abualela Salma , Lv Xiaoxue , Hu Yin , Abd-Alla Mubarak Dirar , Ewakeel Sohad. S. , Mohamed Adam Khalifa 
Published: December 2020

Abstract
Lithium sulfur batteries with high theoretical energy density are promising candidate as next-generation energy storage system. However, practical strategies for releasing the true potential of sulfur cathode are still needed. Therefore, in this work, the NiCo2O4 with hybrid nanostructure is manufactured in a simple atmospheric and water-based method. The surface area of the mesoporous NiCo2O4 is determined to be about 59.99 m2g−1. The electrode with NiCo2O4 exhibits a high initial capacity of 1399.8 mAh g−1 at the current density of 0.1 C. These results indicate that the electrode material has enormous potential as high-performance cathode materials.
Deep residual network for enhanced fault diagnosis of rotating machinery
Authors: Xiong Shoucong , Shi Tielin 
Published: December 2020

Abstract
Deep residual network (DRN) is a recently-developed powerful algorithm in the deep learning filed. This paper introduces the superiority of DRN into the fault diagnosis of rotating machinery for simplifying traditional diagnosing process as well as enhancing predicting performance. DRN can not only extract features automatically from raw or processed signals but also benefit from its especially deep architecture to continually improve representation capacity without worrying gradient divergence issues. The functions of DRN result from the unique structure design called residual building block, which will be described clearly with the network overall architecture in this paper. Additionally, the comparison of the DRN with other machine learning-based and neural network-based fault diagnosis methods are presented.
The role of non-equilibrium plasma kinetic effect on GCH4/GOX rocket engine combustion performance
Authors: Chen Qingya , Ge Jiaying , Zheng Tikai , Che Xueke , Nie Wansheng 
Published: December 2020

Abstract
Non-equilibrium plasma has significant chemical kinetic effect and aerodynamic effect, both of which play an important role in the plasma-assisted combustion. In this paper, the numerical study on plasma-assisted combustion in gaseous methane rocket engine is carried out to investigate the impact of kinetic effect on its combustion performance. There are three schemes of plasma excitation via oxygen, methane and both of them in the numerical simulation model. The variations of combustion chamber temperature, pressure, species concentration and special impulse with different dissociation degrees are analysed in three discharge schemes. The results show that non-equilibrium plasma can effectively increase methane burning rate, shorten unburnt area upstream of combustion chamber, and increase the width of combustion zone in shear layer upstream of combustion chamber. And this phenomenon becomes more obvious with the increase of excitation intensity. In addition, more methane and oxygen are added to the combustion process under plasma actuation, and the mole fraction of water is increased in combustion products. The specific impulse of engine is also increased under plasma actuation. At the same degree of dissociation, the combustion-supporting effect of simultaneous discharge of oxygen and methane is significantly greater than that of any component discharge. And in the condition of single component discharge, the combustion-supporting effect of methane is better than that of oxygen.
A new prediction method of reservoir porosity based on improved Kriging interpolation
Authors: Hao Tongchun , Zhong Liguo , Zhu Tianyin , Zhang Xiaocheng , Wang Xiaopeng , Zhang Lei 
Published: December 2020

Abstract
In the process of oil and gas field development, the pore characteristics of reservoir are the main factors that affect the reservoir capacity and production efficiency. The physical property parameters and pressure distribution of layers have changed greatly, and the pressure system of multi-pressure layer is formed underground of multi-layer reservoir and heterogeneous sandstone oil reservoir after water injection and chemical injection. Accurate prediction of reservoir physical properties and formation pressure distribution after changes is significance for efficient production and safe operation of reservoirs. In this paper, based on geostatistics theory and percolation mechanics theory, combined with reservoir geology, drilling, development and testing data of Bohai Oilfield, the prediction method of reservoir porosity based on improved Kriging interpolation and effective thickness has been established. This prediction method can provide certain guidance for the formulation of oilfield injection and production distribution plans at the oilfield and the shut-in and adjustment plans for injection-production wells during drilling and completion operations.
Research on teaching mode of Introduction to Mechanical Engineering course
Authors: Zhang Jian , Lin Zekun , Tang Wenxian , Wang Xin 
Published: December 2020

Abstract
This article is aimed at the teaching status of domestic universities. A set of teaching mode and syllabus based on the improvement of the traditional Introduction to Mechanical Engineering course is proposed. It mainly introduces the nature and tasks of the course, the design of the syllabus content and the grading standard of the course. It also explains the specific implementation plan of the teaching mode. Introduction to Mechanical Engineering is intended for students who are in the first year of a typical university program in mechanical engineering. The main tasks of this course include increasing students’ interest in mechanical engineering, enabling them to understand the role and skills of mechanical engineers in our society, deepening their understanding of the connotation of mechanical engineering and learning about modern tools for solving complex engineering problems and the development of typical marine structures. Course grades are evaluated based on the number of attendance and the completion of homework. While introducing online teaching, it also provides video lesson resources for students to learn after class because of the current impact of the “COVID-19”. Considering about the teacher’s own scientific research direction, the theoretical research and engineering practice content are combined. Through the study of the teaching cases proposed, it is concluded that the teaching mode has the advantages of not being restricted by the teaching location, enhancing students’ enthusiasm for learning and guiding students to plan their future careers and make contributions to the society. The feasibility and effectiveness of the new model are verified.
Solving a source distribution in heat conduction equation by homotopy analysis method
Authors: Wang Bingxian , Xu Mei , Bai Chuanzhi 
Published: December 2020

AbstractThe diffusion process from internal source is governed by the diffusion equation. The reconstruction of source distribution in heat conduction equation has been considered from final measurement data. The major difficulty in establishing any numerical algorithm for approximating the solution is the ill-posedness of the problem. Regularization procedures and recursive estimation algorithms should be developed. A homotopy-based iterative regularizing scheme has been proposed. The advantage of the proposed scheme is that under general assumptions on the exact initial distribution, the convergence of the homotopy sequence with any function inDφas initial guess can always be guaranteed.
A cluster-based technique for solving the GAVE
Authors: Guo Wenxiu 
Published: December 2020

Abstract
Generalized absolute value equation (abbreviated as GAVE) has wide applications in scientific computing and engineering. In this paper, we propose a cluster-based technique for solving the GAVE. First, the GAVE is shown to be equivalent to a linear equation which is related to the signs of the solution. In order to avoid the disadvantage of the existence of the sign index sets which is problem depended, by the framework of a fixed-point iteration, the analysis of the signs of the iteration vectors is given. Some necessary conditions of the nonzero and zero entries of the iteration vector are presented. Then, the signs of the solution of the GAVE can be partitioned by a clustering process. Numerical examples show that the proposed technique can work and significantly accelerate the computational efficiency comparing to some existing methods.
Matching technology of reducer bearing based on genetic algorithm
Authors: Wang Yanzhong , Liu Peng , Ma Tao , Hao Huihui 
Published: December 2020

Abstract
This paper presents a method of bearing selection for heavy reducer based on genetic algorithm. A mathematical model for the selection of key parts of bearing cap and adjusting ring is established, the coding mode of bearing cap and adjusting ring components is determined, the initial population is constructed, the fitness function is established, and the genetic calculations of selection, crossover and variation are carried out. Finally, through repeated experiments and 500 iterations, the value of the optimal objective function tends to be stable, and a good convergence effect is obtained. The assembly rate of the gearing cap-adjustment ring assembly is increased from the original 50% to over 70%, which greatly improves the assembly efficiency of heavy-duty reducer bearing, and thus the assembly cost is reduced, which is significant to the actual assembly of heavy-duty reducer.
Image detail extraction via dark region approximation
Authors: Min Chaobo 
Published: December 2020

Abstract
In this paper, we propose a simple but effective approximation—dark region approximation (DRA) to extract details from gray-scale images. The DRA is based on an assumption: there is little illumination in the dark regions of visible images. The Retinex model using the DRA is developed to improve the performance of preserving details from the dark regions in gray-scale images during reflectance estimation. Then, Gaussian field criterion is introduced to construct the objective function which could be solved by quasi-Newton method, in order to estimate the reflectance via the DRA-based Retinex model. The reflectance is considered as the final result of image detail extraction. Experiments on a variety of gray-scale images demonstrate the power of the DRA and the superiority of our method.
Preparation, characterization and wound healing effect of alginate/chitosan microcapsules loaded with polysaccharides from Nostoc Commune Vaucher
Authors: Yang Mingjun , Li Run , Wang Xinjian , Liu Xiaofeng , Zhang Baigang , Wang Yonggang 
Published: December 2020

Abstract
Biologically active coating materials could promote the growth of granulation tissue as auxiliary materials, while natural polysaccharides could promote vascular regeneration and wound healing. Therefore, in this study, ultrasound-assisted extract of Nostoc commune Vaucher polysaccharides (UAP) yield after the process optimization was 12.89 ± 0.24%, which was used to prepare microcapsules by emulsification and cross-linking. The effect of alginate/chitosan-UAP composite materials on wound healing in an experimental rat model for 14 d and its physical properties were evaluated. In vitro experiments indicated that the UAP microcapsule material had a porous and loose three-dimensional network structure, and had good biocompatibility and swelling properties as a wound healing material. Animal experiments indicated that UAP microcapsules could extremely significantly promote wound healing (P < 0.01), and wound closure rate reached 79.16 ± 3.91% on 14th day. Meanwhile UAP microcapsules might promote angiogenesis and granulation growth by enhancing immunity and increasing the expression of VEGF and miR-21. Therefore, the composites of UAP microcapsules have shown encouraging results as a potential dressing for wound healing.
From legacy effects of acid deposition in boreal streams to future environmental threats
Authors: Laudon Hjalmar , Sponseller Ryan A , Bishop Kevin 
Published: December 2020

Abstract
Few environmental issues have resulted in such a heated policy-science controversy in Sweden as the 1990s acidification debate in the north of the country. The belief that exceptionally high stream acidity levels during hydrological events was caused by anthropogenic deposition resulted in a governmentally funded, multi-million dollar surface-water liming program. This program was heavily criticized by a large part of the scientific community arguing that the acidity of northern streams was primarily caused by naturally occurring organic acids. Here, we revisit the acid deposition legacy in northern Sweden two decades after the culmination of the controversy by examining the long-term water chemistry trends in the Svartberget/Krycklan research catchment that became a nexus for the Swedish debate. In this reference stream, trends in acidic episodes do show a modest recovery that matches declines in acid deposition to pre-industrial levels, although stream acidity continues to be overwhelmingly driven by organic acidity. Yet there are legacies of acid deposition related to calcium losses from soils, which are more pronounced than anticipated. Finally, assessment of these trends are becoming increasingly complicated by new changes and threats to water resources that must be recognized to avoid unnecessary, expensive, and potentially counterproductive measures to adapt and mitigate human influences. Here we make the argument that while the acidification era is ending, climate change, land-use transitions, and long-range transport of other contaminants warrant close monitoring in the decades to come.
From Paris to Makkah: heat stress risks for Muslim pilgrims at 1.5 °C and 2 °C
Authors: Saeed Fahad , Schleussner Carl-Friedrich , Almazroui Mansour 
Published: December 2020

Abstract
The pilgrimages of Muslims to Makkah (Hajj and Umrah) is one of the largest religious gatherings in the world which draws millions of people from around 180 countries each year. Heat stress during summer has led to health impacts including morbidity and mortality in the past, which is likely to worsen due to global warming. Here we investigate the impacts of increasing heat stress during the peak summer months over Makkah at present levels of warming as well as under Paris Agreement’s targets of 1.5 °C and 2 °C global mean temperature increase above pre-industrial levels. This is achieved by using multi member ensemble projections from the half a degree additional warming, prognosis and projected impacts project. We find a substantial increase in the exceedance probabilities of dangerous thresholds (wet-bulb temperature >24.6 °C) in 1.5 °C and 2 °C warmer worlds over the summer months. For the 3 hottest months, August, September and October, even thresholds of extremely dangerous (wet-bulb temperature >29.1 °C) health risks may be surpassed. An increase in exceedance probability of dangerous threshold is projected by two and three times in 1.5 °C and 2 °C warmer worlds respectively for May as compared to the reference climate. September shows the highest increase in the exceedance probability of extremely dangerous threshold which is increased to 4 and 13 times in 1.5 °C and 2 °C warmer worlds respectively. Based on the indicators of hazard, exposure and vulnerability, we carried out probabilistic risk analysis of life-threatening heat stroke over Makkah. A ten time increase in the heat stroke risk at higher wet-bulb temperatures for each month is projected in 2 °C warmer world. If warming was limited to 1.5 °C world, the risk would only increase by about five times, or half the risk of 2 °C. Our results indicate that substantial heat related risks during Hajj and Umrah happening over peak summer months, as it is the case for Hajj during this decade, will require substantial adaptation measures and would negatively affect the performance of the rite. Stringent mitigation actions to keep the global temperature to 1.5 °C can reduce the risks of heat related illnesses and thereby reduce the non-economic loss and damage related to one of the central pillars of a world religion.
From Painlevé to Zakharov–Shabat and beyond: Fredholm determinants and integro-differential hierarchies
Authors: Krajenbrink Alexandre 
Published: December 2020

Abstract
As Fredholm determinants are more and more frequent in the context of stochastic integrability, we unveil the existence of a common framework in many integrable systems where they appear. This consists in a quasi-universal hierarchy of equations, partly unifying an integro-differential generalization of the Painlevé II hierarchy, the finite-time solutions of the Kardar–Parisi–Zhang equation, multi-critical fermions at finite temperature and a notable solution to the Zakharov–Shabat system associated to the largest real eigenvalue in the real Ginibre ensemble. As a byproduct, we obtain the explicit unique solution to the inverse scattering transform of the Zakharov–Shabat system in terms of a Fredholm determinant.
Effect of Basicity on Cu Based Catalyst for CO2 Hydrogenation
Authors: Sukkathanyawat H , Wichianwat K , Tungkamani S , Bampenrat A 
Published: December 2020

Abstract
The purpose of this research is to study the effect of the MgO loading (0.25, 0.5, 1 and 2 Molar) on the Cu/AC catalysts for CO2 hydrogenation. The optimum condition of reaction temperature and ratio of H2:CO2 for CO2 hydrogenation were also investigated. Copper based catalysts were characterized by BET, CO2-TPD, H2-TPR and CO2-TPSR. The catalytic performance of catalysts were carried out in the fixed bed reactor at a reaction temperature of 250 °C pressure of 1 atm with mixture gas of 2:1 molar ratio of H2:CO2. The result shows that MgO increases the surface basicity of catalyst which enhances the bond strength between CO adsorbed on Cu loading to inhibition the reverse water-gas shift reaction, which can well promote the methane selectivity. The optimum conditions for CO2 hydrogenation is temperature of reaction at 300 °C and ratio of H2:CO2 as 2:1.