bluuebunny/crossref_metadata_2025_split huggingface dataset:
The quantum and classical Fano parameter q
Authors: Iizawa Masatomi , Kosugi Satoshi , Koike Fumihiro , Azuma Yoshiro 
Published: February 2021

Abstract
The Fano resonance has been a familiar and important feature in atomic and molecular physics for more than half a century. Typically, the combination of a discrete state with one or more continua results in an asymmetric peak in the ionization spectrum. The peak-shape, called the Fano profile, can be expressed by a simple formula derived by Fano in 1935. However, the interpretation of its characteristic parameter q, which represents the asymmetry of the peak in the formula, is not necessarily intuitively transparent. The Fano resonance is not necessarily a quantum effect, but it is a manifestation of a certain physical mechanism in various systems, both quantum and classical. Through the derivation of q from the known classical pictures with the classical coupled oscillator, we interpret the q value with a geometrical view. And further, we introduce a complex valued q parameter for the description of the resonance with a damped oscillator.
Effect of odd viscosity on the stability of thin viscoelastic liquid film flowing along an inclined plate
Authors: Zhao Juanxia , Jian Yongjun 
Published: February 2021

Abstract
A theory for the stability of a viscoelastic film flowing along an inclined wall which is considered the odd viscosity effect is investigated. Using the lubrication theory, a new liquid-gas interface evolution equation involving odd viscosity effect is derived. Linear stability analysis shows that the larger odd viscosity leads to the higher critical Reynolds number. While the higher viscoelastic parameter makes the critical Reynolds number lower. The weakly nonlinear study reveals that in the limited amplitude range, the supercritical stable region and the explosion region will decrease with the increase of the odd viscosity. Conversely, the unconditional stable region and the subcritical unstable region increase. Interestingly, the threshold of the supercritical stable region decreases with the increase of the odd viscosity. Therefore, by analysing the linear and non-linear stability of the evolution equation, we find that the odd viscosity stabilizes the flow, while the viscoelastic property destabilizes the flow.
Research on poles selection and poles reuse of distribution line
Authors: junkuo Li , jia Guo , lihuan Wang , fan Gao 
Published: February 2021

Abstract
Based on the model selection of distribution line poles and towers, this paper presents the application scheme of high strength concrete poles in distribution lines. At the same time, it studies the reuse of dismantled old concrete poles and puts forward a graded utilization programme. Research achievements can guide the model selection and reuse of distribution line poles so as to help power grid enterprise to improve their quality and enhance their efficiency.
Discussion on Optimization and promotion of measurement standard management system in power industry
Authors: Liu Yudan , Li Chenxi , Zhu Bing , Miao Yu , Guo Jiabao 
Published: February 2021

Abstract
Measurement is the basis of development and service is the basis of measurement. The unity of measurement unit system and the accuracy and reliability of quantity value transmission are the important foundation of national economic development and the strong guarantee of serving social development. With the expansion of power industry business scale year by year, the number of measurement standards is increasing day by day. How to optimize the management mode of measurement standards and build an efficient, lean, interconnected measurement standard management system is the focus of this paper. This paper starts with the innovation of power industry measurement standard management ideas, discusses in detail the realization method of the optimization and promotion of the measurement standard management system, and proposes to establish a "Online + offline" measurement standard management system to realize linkage management mechanism, subvert the original passive cramming service mode, and truly realize customer-oriented, personalized customization and intelligent management mode of service.
Research on Frequency Tracking Technology of High Frequency Induction Equipment
Authors: Wu Baigong , Wu Rujian , Xu Jing , Sun Jianzhi , Wang Xianjian , Wang Qiuping 
Published: February 2021

Abstract
With the development of luxury cruise ships and large offshore platforms, the use of high-frequency electromagnetic heating power sources to replace fireworks for thin steel plate leveling is a new development trend in the shipping and offshore industries. The technical difficulty of high-frequency induction power supplies is frequency track. The frequency tracking circuit in this article uses CD4046 as the core, which not only realizes frequency tracking but also realizes the dead time setting, ensures that the power supply can realize frequency scanning and maximum frequency tracking, and ensures that the circuit always works in resonance or quasi-resonance state, The output is more efficient at this time.
Design and Analysis of Permanent Magnet AC Servo Motor Based on ANSYS
Authors: Lei Hongdan , Chen Ying , Chen Dongdong , Li Zongwei , Zhu Hongguan 
Published: February 2021

Abstract
According to the design requirements, this paper studies electromagnetic design theory, establishes calculation model to determine a design scheme of permanent magnet AC servo motor, and uses finite-element simulation to analyze it under no-load and load conditions. The results show that the design parameters and output performance of the motor can well meet the technical specifications, which can provide a reference for further study.
Research on a monitoring method of measurement standard on-site evaluation
Authors: Liu Yudan , Wu Tong , Sun Lina , Li Dan , Zhang Yidan 
Published: February 2021

Abstract
This paper discusses a monitoring method of on-site evaluation of measurement standards. By means of data acquisition, image recognition, mobile Internet and big data analysis, it can collect real-time field image and sound information in the process of measurement on-site verification, and effectively identify the field collected information, calculating the difference value between the actual measurement and the standard value. On the one hand, according to the different categories, the field operators are warned and instructed by means of voice, image and other means. On the other hand, it records the key information of the measurement field verification, and assists the field operators to complete the online filing of engineering data, so as to realize the monitoring of measurement standard on-site evaluation process.
Implications of changing synchronization in propulsive performance of side-by-side pitching foils
Authors: Gungor Ahmet , Hemmati Arman 
Published: February 2021

Abstract
The unsteady hydrodynamics of side-by-side pitching foils are studied numerically at Reynolds number of 4000 with altering phase differences in the middle of an oscillation cycle. This represents a change in synchronization of oscillating foils, inspired by experimental observations on group swimming of red nose tetra fish. The hybrid oscillation cases are based on an initially out-of-phase pitching that switch to in-phase at the 20th cycle of oscillation. Various sequential combinations of out-of-phase and in-phase pitching are also examined in terms of foil propulsive performance. It is observed that out-of-phase pitching foils initially produce zero total side-force. However, they start producing negative total side-force after 13 oscillation cycles. Contrarily for the in-phase oscillation cases, the initially positive total side-force reverted to zero over time. In hybrid oscillation cases, the negative total side-force produced during the initial out-of-phase oscillations abruptly adjusted to zero following a change of synchronization that led to in-phase oscillations, which is inspired from a particular swimming behavior in fish. Based on three hybrid modes, defined on the onset of mid-cycle switch to in-phase oscillations, it was apparent that the benefit of synchronization, or there lack of, greatly depended on the timing of the change in synchronization. Thus, mid-swimming change of synchronization in side-by-side systems inspired by fish schools compensates for their non-zero total side-force production to maintain their lateral position. Such changes do not translate to significant gains in neither thrust generation nor efficiency.
Approximate symmetries of guiding-centre motion
Authors: Burby J W , Kallinikos N , MacKay R S 
Published: February 2021

Abstract
In a strong, inhomogeneous magnetic field, charged particle dynamics may be studied in the guiding-centre approximation, which is known to be Hamiltonian. When the magnetic field is quasisymmetric, the first-order guiding-centre (FGC) Hamiltonian structure admits a continuous symmetry, and therefore a conserved quantity in addition to the energy. Since the FGC system is only an approximation, it is also interesting to consider approximate symmetries of the guiding-centre Hamiltonian structure. We find that any approximate spatial symmetry coincides with quasisymmetry to leading order. For approximate phase-space symmetries, we derive weaker conditions than quasisymmetry. The latter include ‘weak quasisymmetry’ as a subcase, recently proposed by Rodríguez et al. Our results, however, show that weak quasisymmetry is necessarily non-spatial at first order. Finally, we demonstrate that if the magnetic field is constrained to satisfy magnetohydrostatic force balance then an approximate symmetry must agree with quasisymmetry to leading order.
Towards closed strings as single-valued open strings at genus one
Authors: Gerken Jan E , Kleinschmidt Axel , Mafra Carlos R , Schlotterer Oliver , Verbeek Bram 
Published: February 2021

AbstractWe relate the low-energy expansions of world-sheet integrals in genus-one amplitudes of open- and closed-string states. The respective expansion coefficients are elliptic multiple zeta values (eMZVs) in the open-string case and non-holomorphic modular forms dubbed ‘modular graph forms (MGFs)’ for closed strings. By inspecting the differential equations and degeneration limits of suitable generating series of genus-one integrals, we identify formal substitution rules mapping the eMZVs of open strings to the MGFs of closed strings. Based on the properties of these rules, we refer to them as an elliptic single-valued map which generalizes the genus-zero notion of a single-valued map acting on MZVs seen in tree-level relations between the open and closed string.
Urban Parking Scheme in Hangzhou Based on Reinforcement Learning
Authors: Chen Mingxiu 
Published: February 2021

Abstract
With the increasing number of motor vehicles in China, the traditional parking schemes have become inefficient. Traditional parking mainly relies on the driver’s experience and judgment, which makes the search for a parking space difficult; at the same time it will cause traffic congestion nearby. The current parking system in Hangzhou, which includes smart payment, smart service, smart supervision and big data analysis, has largely alleviated the aforementioned difficulties. However, the existing smart parking system still has many shortcomings, such as insufficient coverage of hardware, and the software used is only an information display interface, which cannot make any judgements. This paper discusses a parking scheme based on reinforcement learning, including the application of Q-learning and DQN, in order to improve the performance of the parking system. Q-learning is the most likely method for smart parking, and DQN can also be used to improve real-time judgment. This paper compares traditional parking, smart parking, and smart parking with reinforcement learning, and lists their advantages and disadvantages respectively. The comparison shows that smart parking systems are overall more beneficial than traditional systems.
Research on the Impact of Policy Incentives on the Implementation of Ship ECA Policies
Authors: Wang Zheng , Liu Ying 
Published: February 2021

Abstract
As a means to effectively control the environmental impact of ships’ air pollutant emissions, the ship ECA policy has been implemented and applied in many regions. The implementation of the ship ECA policy involves many aspects such as shipping companies and maritime supervision of port states. Among them, whether or not to implement incentive measures, or the strength of incentive measures, will directly affect the actions taken by shipping companies to reduce air pollutants from ships. Aiming at the problem that all parties to the game are affected by incentives in the implementation of the ship ECA policy, this paper builds a simulation model for the incentives of the ECA based on the idea of evolutionary game and system dynamics, and analyzes the situation of incentives in different intensities The response of relevant stakeholders in the implementation of the ship ECA policy.
A Study of Maritime Administration Regulation in Process and Afterwards
Authors: Yahan Hu , Minglu Ma 
Published: February 2021

Abstract
—This paper discusses the background, situation and challenges faced by the maritime department to strengthen the regulation in process and afterwards. Then, according to the current management of the maritime department, it analyzes the contents, principles and objectives of strengthening the regulation in process and afterwards based on the regulation means adopted in the daily management of maritime department. Finally, it puts forward some proposals for further enforcement of the regulation in process and afterwards, with the purpose of providing new thought for forging a closed-loop operation and optimizing the regulation of maritime safety.
Housing Price Research Based on System Dynamics Model
Authors: Guo Jingyi , Wang Junwu 
Published: February 2021

Abstract
Based on the theory of system dynamics, a system dynamics model regarding to housing price is constructed. The changes on housing price are simulated via Vensim DSS software, and the effectiveness of the model is verified. Policy regulation experiments are conducted from the prospective of population, land and taxation that are mostly concerned by the government. It can be concluded that the land policy and taxation policy are the main methods for regulation. It provides macro-direction for the government to manage the commercial housing market and control the price of commercial residential house, as well as corresponding decision basis for house purchasers and commercial housing developers in their purchasing and investing. It also provides a systematic prediction method for the comprehensive simulation system of the commercial housing market.
The Optimal Design Scheme of The Arch Bridge of The Double Happiness Island Based on Numerical Analysis
Authors: Biyu Bao , Pandao Li 
Published: February 2021

Abstract
The arch bridge of The Double Happiness Island of Zhangzhou is initially designed as a through steel box girder arch structure. The span layout of the bridge is 115m, the full width of the bridge is 23.3m, the arch rib is steel box section, and the main beam is steel box girder. In this paper, through the finite element analysis and calculation, the calculation results are compared with the national standards of the industry, and the optimized design scheme is proposed for the preliminary design of the bridge, so as to implement the construction drawing design and provide reference for similar projects.
Drivers and mitigation implications of carbon emissions from the direct energy consumption of Gansu’s construction industry
Authors: Xin Lele , Jia Junsong , Song Xu 
Published: February 2021

Abstract
More and more carbon emissions (CE) were produced and arose from the direct energy consumption in Gansu’s construction industry. So, we first computed the CE of Gansu’s construction industry during 2000-2017 in this paper, and then used the Logarithmic Mean Divisia Index (LMDI) model to decompose the driving factors of CE. The results showed that: (1) the CE of Gansu’s construction industry increased from 95.44 × 104 t in 2000 to 127.84 × 104 t in 2017, with the annual growth amount of 1.91 × 104 t and rate of 2%, respectively. (2) The economic development level effect was the dominant driver to promote the CE of Gansu’s construction industry followed by the employment population effect, with the contributions of 100.61 × 104 t and 44.03 × 104 t. However, the energy intensity effect played the most primary role in inhibiting the CE growth, which followed by the energy structure effect, with the contributions of -107.25 × 104 t and -4.99 × 104 t, respectively. Based on the above conclusions, some mitigation implications for the low-carbon development of Gansu’s construction industry were put forward.
Viscoelastic inhomogeneous beams under step loading: a longitudinal fracture analysis
Authors: Rizov V I 
Published: February 2021

Abstract
The present paper describes a longitudinal fracture analysis of an inhomogeneous vscoelastic cantilever beam under step loading. The beam exhibits continuous material inhomogeneity along its thickness, width and length. The creep behaviour is treated by using a linear viscoelastic model. The beam is loaded by a bending moment applied in steps at the free end of the lower crack arm. The time-dependent longitudinal fracture behaviour is studied in terms of the strain energy release rare. For this purpose, a methodology for deriving the time-dependent strain energy release rate with taking into account the creep behaviour under step loading is developed by using the compliance of the beam. A time-dependent solution to the strain energy release rate under step loading is derived also by considering the strain energy cumulated in the beam structure for verification. The change of the strain energy release rate with the time due to creep under step loading is investigated by applying the methodology developed. The effects of the location and length of the crack and the continuous material inhomogeneity on the time-dependent strain energy release rate are analyzed.
Development of floral textile patterns on the base of the golden and Fibonacci geometry
Authors: Ilieva Julieta 
Published: February 2021

Abstract
The application of the golden and Fibonacci geometry in art, architecture and design is one of the ways for creating of aesthetic and beautiful forms. Usually with the help of the elements of the golden and Fibonacci geometry geometrical patterns are designed. The development of floral patterns for textile design on the base of the creations from the golden and Fibonacci geometry is the aim of the presented paper. The golden and Fibonacci geometry symbolism of aesthetic and beauty is applied in design of floral textile patterns, as the most used golden and Fibonacci forms are the golden spiral, Fibonacci spiral, Flower of Life, the golden circles spiral, Fibonacci circles spiral. The patterns are developed in suitable colors decisions, chosen on the base on the analogues with flowers in the nature, the symbolism and influence of the lines, forms and colors, and results of the study of the consumers opinions with correspondence analysis.
Developing an augmented reality textbook for Bachelor and Master programmes “Design, technology and management of the fashion industry”
Authors: Borisova Tanya , Stoykova Vanya , Kazlacheva Zlatina , Videnov Krum 
Published: February 2021

Abstract
Augmented reality is a modern technology that can be used in universities, providing conditions for learning in an interactive virtual environment and achieving a high level of visualization through the means preferred by today’s digital students. AR creates conditions for easier and more accessible studying of the taught material, acquiring more knowledge in a short time, developing creative thinking of the students. AR application can increase the quality of education. In the engineering disciplines is of great importance to view the studied objects from all sides. Instead of multiple 2D images, in the textbooks could be used markers for generating AR with an interactive 3D models, providing full visualization. Students can use their mobile devices for 3D visualization of the considered objects, which makes AR easily accessible. The aim of the research is to develop topics from a textbook on “Design and modelling of women’s dresses in different silhouettes” for students majoring in “Design, technology and management of the fashion industry” using augmented reality (AR).
Training in Programming using Innovative Means
Authors: Shivacheva G I , Ruseva N R 
Published: February 2021

Abstract
Training in programming, related to studying algorithms, is challenging for the lecturers. The aim of this paper is to offer options about how to use innovative means in programming by presenting their specifics and to suggest how to limit some of the disadvantages. During synchronous learning, whether conducted in a computer room or online in a virtual classroom, the three standard ways of presenting algorithms can be applied as creating a flowchart for a specific algorithm with Flowgorithm is presented dynamically rather than as a static image, as on the site. With the introduction of Accumulative frame models in programming training, it can be described verbally through a list of invariant frames, which is recommended to be used in the study of algorithms that consist of more than one basic algorithms. This is a fourth way of presenting algorithms, which can be in the form of a table.
Reconstruction, processing and smoothing of surface geometry of a patient specific ascending aortic aneurysm
Authors: Manopoulos C , Raptis A , Krishan W , Mavratzas C , Drandakis M , Astraka S , Kouerinis I , Vaxevanidis N M 
Published: February 2021

Abstract
This work presents the creation of geometric surface models representing the heart chambers and the aorta for two patient specific cases. The first one concerns an acute ascending aortic aneurysm in the anterior Valsalva sinus and the second one a normal aorta for comparison reasons. The surface modelling was implemented in a medical image reconstruction software (Materialise Mimics), based on the computed tomography scans of the patients. For each case, the two atriums and ventricles, the ascending aorta, aortic arch and descending aorta, the pulmonary artery and the superior vena cava were also reconstructed and modelled. Special attention is given to the morphology of the vessels and the heart chambers that are in contact with the ascending aortic aneurysm, due to the acute aneurysmal extension of the Valsalva sinus. A comparison of the non-aneurysmal and the aneurysmal models is necessary to infer whether this disease affects the geometries and/or other vital organs that come in contact with the aortic aneurysm. Special care is given to the surfaces’ smoothing process to preserve the morphology of the structures, avoiding any deviations from the actual geometries of the corresponding vessels and heart chambers.