bluuebunny/crossref_metadata_2025_split huggingface dataset:
Feature Analysis of Fractal Surface Roughness Based on Three-dimensional W-M Function
Authors: Zhang Bao , Zhou Laihong 
Published: May 2021

Abstract
The three-dimensional W-M fractal function was used to simulate the rough surface, and the different fractal parameters correspond to the different surface morphology. In order to explore the influence rule of fractal dimension D and scale coefficient G on the surface profile, the fractal dimension D value was 2.5, and the scale factor G value was 1E-14. The mean height, standard deviation and spectrum characteristics of the surface contour were analyzed. The results show that under the action of a single fractal parameter, the surface roughness Ra
and the surface contour height standard deviation std all decrease with the increase of D, and increase with the increase of G, and the change trend is basically the same. When D is kept constant and only G is a variable, the surface height value of frequency components remain unchanged, the amplitude of each frequency decreases with the decrease of G; G remains unchanged but only D is a variable, with the increase of D, the frequency amplitude changes slowly, and the amplitude decreases.
Application of nanomaterials-based optical sensors for virus detections
Authors: Shi Jiahao (Carl) 
Published: May 2021

Abstract
Contemporarily, the spread of virus has occurred in everywhere, which affect not only individual’s health but also society in the aspects of social relationships, cultural events, and families. In order to control the spread of the viruses, the rapid and accurate detection approach is crucial. Identified viruses with optical sensing techniques provides a rapid and effective judgement approach in the early diagnosis of patients. The review outlines the application of optical sensors based on nanomaterials for the detection of different viruses, e.g., colorimetric sensors, fluorescence sensors, and surface-enhanced Raman scattering (SERS) sensors. The substantial performances of these optical sensors including high sensitivity, high selectivity as well as high stability are also summarized. Moreover, besides virus recognition, the demonstrated virus optical sensors could also be widely used in detecting heavy metal ions, organophosphorus compounds, small drug molecules, tumor markers, cancer cells, etc.
Tobacco leaf redrying System Control based on Predictive Auto-Coupling PID
Authors: Xie Junli , Jia Zhiwei 
Published: May 2021

Abstract
Temperature and moisture content in the process of threshing and re-drying can be defined as the same type of object, which is large time-delay with strong coupling. According to the present control strategy, the tobacco leaves control object (temperature and moisture content) occurs with large fluctuations due to the existence of uncertain disturbances. Therefore, the quality and reliability of the production is not good enough to keep the clients around. In order to improve the quality of export tobacco leaves. In this paper, Predictive Auto Coupling PID(PAC-PID) control algorithm is used to design controller for tobacco temperature and moisture content. The simulation results denote that the proposed method can smoothly track the desired signal with fast speed and high accuracy. Meanwhile, the control effect is better than the existing methods. We apply the control method to the actual production, the control effect shows that the stable time of the system is less than 16s, in the same time, the moisture content deviation of export tobacco leaves can be controlled within 1.5%. It means that the method can meet the actual production requirements
Study on static characteristics of water-lubricated textured herringbone grooved journal bearings based on laminar cavitating flow lubrication model
Authors: Liu Pengfei , Jiang Shuyun 
Published: May 2021

Abstract
This paper aims to investigate static characteristics of water-lubricated textured herringbone groove journal bearing under laminar cavitating flow. A theoretical model for the bearing was established based on two-phase flow and population balance equation. Field distribution and static characteristics of the bearing are analysed. The result shows the friction torque of the bearing is reduced due to the texture effect; And the frictional torque is reduced with the increasing of texture area ratio and height. The load carrying capacity of the bearing is increased, while the friction torque are slightly affected by the cavitation effect. The existence of texture increases the bubble number density in the bearing-lubrication process.
Review of Trajectory Planning for Industrial Robots
Authors: Yuxuan Hua 
Published: May 2021

Abstract
More and more industrial robots need high-precision trajectory control, but the traditional PID control is difficult to achieve. The simulation diagram and pose of the collision free mechanism are drawn by using rosty software. At the same time, through the experiment of MOTOMAN-HP3 robot, using VC + + application program to call the external interface function of motocom32 software, the application program planning is realized. The linear and circular trajectory planning of industrial robot in Cartesian space is studied. Linear interpolation algorithm based on spatial parabola transformation and circular interpolation algorithm based on local coordinates are proposed. The algorithm is applied to a self-designed 5-DOF spraying robot. An evolutionary algorithm based optimal trajectory planning method for PUMA560 robot is proposed. The method is based on the elite non dominated sorting genetic algorithm (NSGA-II). The results show that the minimum angular displacement, angular velocity and angular acceleration of X3 parallel robot are 56, and the maximum angular displacement, angular velocity and angular acceleration are 89.
Buckling Analyses of Edge-cracked Functionally Graded Graphene Reinforced Composite Piezoelectric Beam
Authors: Guo L J , Mao J J , Zhang W 
Published: May 2021

Abstract
This paper investigates the buckling behaviors of edge-cracked functionally graded graphene reinforced composite (FG-GRC) beam with piezoelectric actuators. The bending stiffness of the crack section is equivalent to the bending stiffness of massless rotational spring. The modified Halpin-Tsai model and rule of mixture are used to estimate the effective mechanical properties of the FG-GRC beam. The electro-mechanical governing equations of buckling behaviors for the edge-cracked FG-GRC beam are derived by Timoshenko beam theory, von Kármán strain displacement relationship and Ritz method. Along the thickness of the beam, both functionally graded (FG) and uniformly distributed graphene nanoplatelets (GPLs) are considered. The influences of GPL mass fraction, GPL distribution patterns, GPLs geometry, crack depth, crack location and thickness of piezoelectric layer on the buckling characters of the FG-GRC beam are studied in this paper.
Temperature rise characteristics of high-speed water-lubricated hydrostatic thrust bearing
Authors: Fukang Liu , Shuyun Jiang 
Published: May 2021

Abstract
Hydrostatic thrust bearings have been widely adopted in machine tools. However, high level of temperature rise due to film shearing and hydraulic power of water pump leads to decrease of machining accuracy while operating at high speeds. This paper aims to investigate the temperature rise characteristics of a high-speed water-lubricated hydrostatic thrust bearing. Based on Newtonian law of viscosity, hydrostatic theory and first law of thermodynamic, considering the influence of pressure flow, shearing effect and centrifugal effect, the temperature rise of lubricating water has been deduced. The influence of rotational speed and eccentricity has been studied. Result shows that high-speed water-lubricated thrust bearing has good thermal performance.
Microstructure and Mechanical Properties of DC Cast 7065 Aluminum Alloy
Authors: He K Z , Tan Z M , Zheng X , Zhang X M , Zhou K C 
Published: May 2021

Abstract
The microstructure and mechanical properties of 7065 alloy was investigate in this present work. The main intermetallic phases of the 7065 alloy identified by EDS analysis were (Mg,Cu) 2Zn, Al 2Cu and Al 7Cu 2Fe. The microstructure of the 7065 alloy after hot rolling mainly consists elongated fibrous grains containing sub-grains, indicating that dynamic recovery is the primarily mechanism during hot rolling. The 7065 alloy has lower quench-sensitive and higher mechanical properties than that of the 7050 alloy.
Influence of injection angle on oil splash of herringbone gear
Authors: Wang Yanzhong , Zhang Yaping , Huang Changxu 
Published: May 2021

Abstract
Oil injection lubrication is a common lubrication method for aviation gear transmission. Due to the high-speed rotation of the gear, a part of the lubricating oil splashes off the gear surface after colliding with the gear surface. The amount of oil splashing under the oil injection condition affects the cooling effect of gear lubrication. In this paper, according to the characteristics of aviation herringbone gear injection lubrication, an oil splash calculation model of aviation herringbone gear injection lubrication is established by using advanced computational fluid dynamics theory and method, and the influence of different injection angles on oil splash is analyzed, which can provide theoretical guidance for the design of injection lubrication parameters.
CMS phase-II upgrade of the RPC Link System
Authors: Boghrati B. , Amoozegar V. , Ebrahimi M. , Ghasemi R. , Mohammadi Najafabadi M. , Zareian E. , Samalan A. , Tytgat M. , Zaganidis N. , Alves G.A. , Marujo F. , Torres Da Silva De Araujo F. , Da Costa E.M. , De Jesus Damiao D. , Nogima H. , Santoro A. , Fonseca De Souza S. , Aleksandrov A. , Hadjiiska R. , Iaydjiev P. , Rodozov M. , Shopova M. , Sultanov G. , Bonchev M. , Dimitrov A. , Litov L. , Pavlov B. , Petkov P. , Petrov A. , Qian S.J. , Bernal C. , Cabrera A. , Fraga J. , Sarkar A. , Elsayed S. , Assran Y. , El Sawy M. , Mahmoud M.A. , Mohammed Y. , Combaret C. , Gouzevitch M. , Grenier G. , Laktineh I. , Mirabito L. , Shchablo K. , Bagaturia I. , Lomidze D. , Lomidze I. , Bhatnagar V. , Gupta R. , Kumari P. , Singh J. , Abbrescia M. , Aly R. , Elmetenawee W. , De Filippis N. , Gelmi A. , Iaselli G. , Leszki S. , Loddo F. , Margjeka I. , Pugliese G. , Ramos D. , Benussi L. , Bianco S. , Piccolo D. , Buontempo S. , Di Crescenzo A. , Fienga F. , De Lellis G. , Lista L. , Meola S. , Paolucci P. , Braghieri A. , Salvini P. , Montagna P. , Riccardi C. , Vitulo P. , Francois B. , Kim T.J. , Park J. , Choi S.Y. , Hong B. , Lee K.S. , Goh J. , Lee H. , Eysermans J. , Uribe Estrada C. , Pedraza I. , Castilla-Valdez H. , Sanchez-Hernandez A. , Mondragon Herrera C.A. , Perez Navarro D.A. , Ayala Sanchez G.A. , Carrillo S. , Vazquez E. , Radi A. , Ahmad A. , Asghar I. , Hoorani H. , Muhammad S. , Shah M.A. , Crotty I. 
Published: May 2021

Abstract
The present RPC Link System has been servicing as one of the
CMS subsystems since installation in 2008. Although the current Link
System has been functioning well for the past 13 years, the aging of
its electronic components and lack of radiation hard ASICs could
present problems for future operations. Additionally, the needs to
have a more robust control interface against electromagnetic
interference, to improve the trigger performance with finer time
granularity and to incorporate a higher bandwidth transmission lines
led the idea of upgrading the Link System for the HL-LHC. This
paper reviews the features of the recently developed prototype of
the new Link System.
The Casimir effect for nonlinear sigma models and the Mermin–Wagner–Hohenberg–Coleman theorem
Authors: Flachi Antonino , Vitagliano Vincenzo 
Published: May 2021

Abstract
The quantum vacuum (Casimir) energy arising from noninteracting massless quanta is known to induce a long-range force, while decays exponentially for massive fields and separations larger than the inverse mass of the quanta involved. Here, we show that the interplay between dimensionality and nonlinearities in the field theory alters this behaviour in a nontrivial way. We argue that the changes are intimately related to the Mermin–Wagner–Hohenberg–Coleman theorem, and illustrate this situation using a nonlinear sigma model as a working example. We compute the quantum vacuum energy, which consists of the usual Casimir contribution plus a semiclassical contribution, and find that the vacuum-induced force is long-ranged at large distance, while displays a complex behaviour at small separations. Finally, even for this relatively simple set-up, we show that nonlinearities are generally responsible for modulations in the force as a function of the coupling constant and the temperature.
Groundwater Resource Assessment of an alluvial aquifer in parts of Varanasi and Sant Ravidas Nagar Districts, Uttar Pradesh, India using GRE-2015
Authors: Kumar Chaurasia Abhishek , Pandey H K , Tiwari S K 
Published: May 2021

Abstract
The importance of groundwater in India can be realized from the fact that the 85% of rural drinking water supply is dependent on groundwater. There has been paradigm shift from surface to ground water in view of poor quality and reduction in river flow/discharge in the recent past. The concept of micro and sustainable irrigation may be achieved efficiently through groundwater. Therefore, the groundwater resource assessment is essential to make the development plan for meeting out the drinking and irrigation demand for any groundwater unit. An attempt has been made to evaluate the groundwater resource using the latest Ground Water Resource Estimation (GRE-15) of an area that has gone through extensive irrigation using groundwater so that the groundwater stress areas can be sustainably managed. The present research is based on the Groundwater Resource Estimation methodology- 2015 to evaluate the groundwater availability and the stress conditions occurring in the study area. The stage of groundwater development inferred after the study shows that Araziline block of Varanasi and Bhadohi block of Sant Ravidas Nagar district of Uttar Pradesh are falling under the critical category while Sevapuri block of Varanasi district of Uttar Pradesh falls under the semi-critical category. The current estimation warrants the immediate need for proper management of groundwater resources.
Magnetic properties of black cotton soils and lateritic soils developed on the Late Cretaceous Deccan flood basalts of northern Karnataka, India
Authors: Priya K 
Published: May 2021

Abstract
The magnetic properties of black cotton and lateritic soils developed on Deccan basalts in northern Karnataka, India, have been studied to determine magnetic mineral sources and decipher their relative age. These soils are highly magnetic, indicating lithogenic contribution. The results show that black cotton soils are characterized by coarse-grained stable single-domain (SSD) lithogenic magnetic minerals, and in lateritic soils, it is superparamagnetic (SP) pedogenic magnetic minerals. The main magnetic minerals in black cotton soils are titano-magnetite/maghemite, while in lateritic soils, it is magnetite/maghemite and/or hematite/goethite. The variability of these soils’ magnetic properties is due to changes in the concentration of magnetic minerals, the size of their magnetic grains, or magnetic mineralogy. Black cotton soils are younger and are at the initial stage of soil development, while laterite soils are older and are at the latter stage of soil development.
Tectonic control on drainage network evolution and evidence of neotectonic activities in of the Wan River sub-basin, Central India
Authors: Manjare B S , Singh Vineesha , Masurkar S P 
Published: May 2021

Abstract
The study area lies in the Northeastern part of the Gavilgrah fault vicinity, which is one of the essential tectonic elements of the Son-Narmada-Tapti lineament, trending ENE-WSE direction. In this study field, data and satellite data observation are used for drainage characteristics of Wan river sub-basins. The course of Wan River is mostly controlled by the Gavilgrah fault and associated tectonic elements. The Wan River, which crosses the North’s fault, exhibits two river terraces that rise and continue downstream, where the river flows on the down-thrown block. The drainage characteristics of the study area were investigated by using the LISS- III satellite data. The study of neotectonism is based on field evidence and drainage pattern. The nature of the drainage pattern in the study area shows dendritic, rectangular, and parallel together and shows evidence of neotectonic activity in the study area. The longitudinal river profile, the shape of the basin, gradient fluctuations, and valley incision, and their result also indicate neotectonic activities in the study area.
An experimental study on corrosion initiative of infused reinforcing bar in concrete
Authors: Shridevi Pa Velci , Ashok M , Daniel Ronald Joseph J , Dhanalakshmi A 
Published: May 2021

AbstractDurability of concrete is the essential property for the lifespan of concrete structures. Rusting of steel is the major factor responsible for the loss of durability property. In order to study the corrosion behaviour of three types of reinforcing bars like Thermo-mechanically treated bar(TMT), Corrosion resistant steel (CRS), Epoxy coated rebar(ECR) were experimentally studied. The reinforcing bars having 12 mm diameter were infused in 300×300×75 mm size of concrete slab samples were kept under room temperature and certain samples are spraying with 3% of NaCl solution to attain a simulated marine exposure condition. There are various techniques including Open circuit potential (OCP), Linear polarisation resistance (LPR), Electrochemical impedance spectroscopy (EIS) are used to monitorize the corroding performance of samples. On analysing the results of the electrochemical studies, it could be inferred that the efficient rebar to withstand the corrosive nature by improving the life expectancy of the concrete structure.
Visible light flashes induced by pulsed stimulated Brillouin scattering in narrow-linewidth, high-power, near-IR fiber lasers
Authors: Choudhury Vishal , Aparanji Santosh , Prakash Roopa , Balaswamy V , Supradeepa V R 
Published: May 2021

Abstract
We report an interesting observation of visible light flashes indicating pulsing events in Near Infrared fiber laser systems. Using a narrow-linewidth, continuous-wave (CW) fiber laser operating at 1064 nm, we observed visible flashes composed of faint, red, orange, yellow and green colors. Concurrently with the visible flashes, the spectra in the backward direction showed different Raman Stokes orders of 1064 nm for a silica medium. We attribute this form of visible light generation to Cherenkov-type phase-matched harmonic generation in optical fibers enabled by high-peak-power parasitic pulses. These pulses are attributed to the onset of stimulated Brillouin scattering. The harmonics of different Raman Stokes orders of the pulses are responsible for the different visible colors observed. This effect is potentially observable in any laser system with a high optical power with a CW, quasi-CW or pulsed form.
Synthesis and physical characterization of magnetron sputtered Graphene-CdS bilayer
Authors: Trivedi Harshita , Shafaghi Hanieh , Shagya Naresh , Lahiri Jayeeta , Ghorannevis Zohreh , Parmar Avanish S 
Published: May 2021

Abstract
CdS/Graphene Nano composites have been extetinsively investigated in the field of basic industrial research and electronic device applications because of their unique physical, chemical properties and photo stability under visible‐light irradiation. In this study, we explore the electrical properties of Cadmium sulfide with the addition of graphene. CdS/Graphene hybrid was fabricated by simple RF magnetron sputtering method using CdS as a sputtering source. The hybrid material formation and structural properties of Graphene, CdS, CdS/Graphene have been discussed using XRD, FTIR, Raman, and UV–vis spectroscopy techniques. Herein, we present a facile and efficient method for hybridization of CdS Nano-sphere with graphene Nano sheet and subsequent investigation of enhancement of current of the hybrid material. Field emission scanning electron microscopy (FESEM) micrographs reveal the formation of CdS nanospheres and homogeneous scattering on the surface of graphene sheets. The UV absorption spectrum of CdS/Graphene hybrid presented a red-shifted. The enhancement in the current of CdS/Graphene hybrid has been observed due to the generation of electron-hole pairs. Also, current-voltage (I-V) characteristics of an as-grown thin film of the hybrid are conducted using 4-point probe measurement and revealed their semiconducting nature with a drastic enhancement of electrical conductivity.
Floquet problem and center manifold reduction for ordinary differential operators with periodic coefficients in Hilbert spaces
Authors: Kozlov V. , Taskinen J. 
Published: May 2021

A first order differential equation with a periodic operator coefficient acting in a pair of Hilbert spaces is considered. This setting models both elliptic equations with periodic coefficients in a cylinder and parabolic equations with time periodic coefficients. Our main results are a construction of a pointwise projector and a spectral splitting of the system into a finite-dimensional system of ordinary differential equations with constant coefficients and an infinite-dimensional part whose solutions have better properties in a certain sense. This complements the well-known asymptotic results for periodic hypoelliptic problems in cylinders and for elliptic problems in quasicylinders obtained by P. Kuchment and S. A. Nazarov, respectively.

As an application, a center manifold reduction is presented for a class of nonlinear ordinary differential equations in Hilbert spaces with periodic coefficients. This result generalizes the known case with constant coefficients explored by A. Mielke.
How do people living with dementia perceive eating and drinking difficulties? A qualitative study
Authors: Anantapong Kanthee , Barrado-Martín Yolanda , Nair Pushpa , Rait Greta , Smith Christina H , Moore Kirsten J , Manthorpe Jill , Sampson Elizabeth L , Davies Nathan 
Published: May 2021

Abstract

Background
Eating and drinking problems are common among people living with later-stage dementia, yet few studies have explored their perspectives.

Objective
This study aimed to explore how people living with mild dementia understand possible future eating and drinking problems and their perspectives on assistance.

Design
Qualitative study using semi-structured interviews.

Setting
Community.

Methods
We conducted semi-structured interviews with 19 people living with mild dementia. Interviews were transcribed verbatim and analysed thematically.

Results
Five themes were identified: (i) awareness of eating and drinking problems; (ii) food and drink representing an individual’s identity and agency; (iii) delegating later decisions about eating and drinking to family carers; (iv) acceptability of eating and drinking options; and (v) eating and drinking towards the end of life. For people living with mild dementia, possible later eating and drinking problems could feel irrelevant and action may be postponed until they occur. Fears of being a burden to family and of being treated like a child may explain reluctance to discuss such future problems. People living with mild dementia might wish to preserve their agency and maintain good quality of life, rather than be kept alive at later stages by artificial nutrition and hydration.

Conclusion
For people with mild dementia, eating and drinking problems may seem unrelated to them and so get left undiscussed. Negative connotations regarding eating and drinking problems may hinder the discussion. The optimal time to discuss possible future problems with eating and drinking with people with mild dementia may need an individual approach.