bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling and Data Analysis of Spillover Effect on Time Series Fluctuation
Authors: Peng Zhikai , Ke Jinchuan , Liu Chuge , Zhang Tong 
Published: August 2021

Abstract
This paper explores the two-way risk spillover effect between fin-tech innovation and the real economy, applying the time-varying Copula-CoVaR method and quantitatively analyzing the two-way risk spillover effect and risk spillover asymmetry. The research results show that the yield sequence of fin-tech innovation and real economy is asymmetric when risk impact, the impact of bad news is stronger than good news, and there is dynamic linkage effect and positive correlation between fin-tech innovation and the real economy. In addition, there are significant two-way risk spillover effects, namely, risk events in one market can cause increased risk in the other market, but this pair of risk spillover effect is not completely symmetrical.
Simulation Research on Wind Storage Joint Control of Wind Turbine Based on VSG
Authors: Wang Pengcheng , Fu Xiaojin 
Published: August 2021

Abstract
The fluctuation of wind energy has an impact on the stability of active power output and system frequency, resulting in the decline of power quality. In addition, the large-scale wind power generation which is connected to the power grid reduces the inertia of system. The use of VSG control can effectively deal with the lack of inertia response ability of traditional synchronous generators. In the state of large-scale distributed wind power generation connected to the power grid, the ability of wind turbines to suppress the power oscillation of the system can be enhanced. In order to improve this ability, the VSG control strategy is introduced into the control of network test converter, and the virtual inertia control technology is used to respond to the system frequency modulation. The voltage loop and current loop control strategy are adopted for the Generator side rectifier. Meanwhile, the energy storage control of the battery system is introduced. Realize the regulation of wind power active power. In the MATLAB/Simulink, a combined wind energy storage system is built to verify the correctness of the proposed scheme. Finally, the maximum wind energy tracking, the enhancement of system frequency regulation ability and the stabilization of active power output fluctuation are realized. It can effectively restrain the reduction of economic benefits after long-term operation of wind farm.
Lumped Mass Model for Flexible Cable: A Review
Authors: Chen Xin , Hong Bin , Lin Zhangxi , Hou Jing , Gao Zhendong , Lv Shunya 
Published: August 2021

Abstract
Model of a flexible cable plays a great role in the applications of underwater towing system, mooring line system, etc. A complete mathematical model is a basis to accurately describe the dynamic characteristics of flexible cable. This article presents a state of art comprehensive review of lumped mass model. First, the mathematical principle of the lumped mass model, including geometric simplification, force analysis, and solution, are systematically summarized.Second, the dynamic response of cable under different boundary conditions is introduced, and boundary conditions are categoried. Third, the numerical solution of the lumped mass model are assessed. Finally, based on the application of guide dog robot, the authors discussed the research future and trends. The authors aim to ealize human-robot interaction through a flexible cable.
An Image Retrieving Method Based on Strong Constrained Manifold-embedded Hashing
Authors: Liang Hui , Pu Dongbing , Zhang Libiao , Sun Yingjuan 
Published: August 2021

Abstract
In recent years hashing methods have attracted considerable attention. The main procedure of manifold hashing methods is to convert the high dimension features into binary codes and then use manifold distance to approximate the original Euclidean distance. However, there still is a problem that how to directly preserve the manifold structure by hashing. Besides, because of information loss, the effect of using existing hashing methods to retrieve images is not ideal when the length of binary code is very short. In order to solve these problems, we proposed a strong constrained manifold-embedded hash (SCDMH), which can not only explore the nonlinear manifold structure of data, but also make full use of the semantic information in the data. Additionally, the objective function we proposed reconstructs the original features of the datasets and the hash representation mutually to preserve the semantic information. Our experimental results on three large benchmark datasets demonstrate that SCDMH outperforms other state-of-the-art baselines.
Upper Boundsand Extreme Results for Conflict-free Vertexconnection Number
Authors: Ji Meng , Li Xueliang , Schiermeyer Ingo 
Published: August 2021

Abstract
A path of a vertex-colored graph is conflict-free path, if there exists a color used only on one of its vertices; a vertex-colored graph is conflict-free vertex-connected, if there is a conflict-free path between each pair of distinct vertices of the graph. For a connected graph G, the minimum number of colors required to make G conflict-free vertex-connected is conflict-free vertex- connection number of G, denoted by vcfc(G). In this paper, we first showed an upper bound of vcfc(G) for the general graph by structural method. And then, we gave a partial solution to the conjecture on the conflict-free vertex-connection number by contradiction, posed by Doan and Schiermeyer in [Conflict-free vertex connection number at most 3 and size of graphs, Discus. Math. Graph Theory].
Maximum Power Tracking of Ocean Energy Generator Based on Active Disturbance Rejection Control
Authors: Li Dalian , Tian Ka , Zhang Fuxi , Wang Shiming , Sun Xinyi 
Published: August 2021

Abstract
In order to make the ocean energy generator system realize the maximum power under various conditions, this paper proposes a control strategy based on linear active disturbance rejection control algorithm. The output power is mainly affected by the spin-speed of the generator in a nonlinear manner, and this phenomenon is originated from the tip speed ratio state of the turbine blades. This tip speed ratio associated maximum power can be achieved through a coupled control system that adjusts the spin-speed of generator elaborately. The state equations of ocean power generation system are transformed into a standard form to fit the linear active disturbance rejection control. Finally, the simulation model of the system is established by using Matlab/Simulink platform, with a series of input signals for different working conditions. The results verify that the maximum power under control can be effectively attained by a quick tracking of the target speed.
Secure Private Comparison of Equality using Quantum Resources
Authors: Wei Tingting , Zhang Cai 
Published: August 2021

AbstractPrivate comparison of equality is an essential task in secure multiparty computation. In this paper, we investigate such a task in quantum settings. Particularly, we design a comparison protocol using quantum resources. The protocol allows three users to verify whether the private inputs of three users are identical and preserve their inputs’ privacy without an extra third party who can help the verifying process. The proposed protocol does not require unitary operations for the information encoding, which, to some extent, facilitates the protocol’s implementation. In addition, the Trojan horse attacks are invalid to the proposed protocol as it only employs one-step quantum transmissions. We also show that the presented protocol is secure against some well-known attacks.
Information system for analyzing negative impacts on forests of the border regions
Authors: Zelentsov V A , Potryasaev S A , Semenov A E 
Published: August 2021

Abstract
The article describes the architecture and composition of a software package for the creation of an information system (IS) to be used in the state of natural objects analysis, in particular, forests of the border region of Russia-South-East Finland. Information system development is carried out within the InnoForestView Project of the ENI CBC Program. The project addresses the consequences of three types of negative impacts: forest fires, diseases and insects, and the proximity of roads. It is shown that the use of a service-oriented architecture with the implementation of individual components of IS in the form of web services, as well as the proposed technologies for integrating heterogeneous information resources, including Earth remote sensing data, ensures the fulfillment of the basic requirements for IS, including the possibility of multi-temporal analysis, maximum automation of tasks to be solved, and user friendliness.
Forest monitoring and analysis based on Earth observation data services
Authors: Ponomarenko M R , Zelentsov V A 
Published: August 2021

Abstract
The paper presents an overview of thematic services providing Earth observation based products for forest monitoring. The authors analyzed both global and regional (in particular - Russian) forest services including input satellite data, output thematic products and features of data access. Based on gathered information, the main advantages and limitations of existing services were highlighted. The results of performed research confirm the need to develop the system integrating data from various forest remote monitoring services for the efficient and timely analysis of forests (especially - in cross border regions).
Use of LiDAR technology for quantification and design of park, garden and urban tree structure
Authors: Frolova V , Chernyshenko O , Batarin A 
Published: August 2021

Abstract
It is essential to know the parameters of trees making up a city’s green infrastructure for evaluating the functions of its ecosystems and ecosystem services being provided. Traditional methods of creating tree inventories proved to be slow and costly, while not being able to provide sufficient data for ecosystem services mapping. Laser scanning methods can be used to obtain accurate measurements of tree dimensions, crown size measurements and overall tree structure details. They can be used to analyze large forested areas at a fraction of the time needed to measure each tree individually by hand. The goal of this study was to conduct an approbation of ground-based 3D scanning methods and test their capabilities of obtaining tree parameters for use in green infrastructure inventories. The research is based on scans and analysis of sites of the green fund of Moscow, Russia, during the vegetation periods of the years 2019-2020. LiDAR scanning allows automatic georeferencing of data and creates detailed 3D geometry of tree objects. This enables previously impossible measurements of tree dimensions to be taken and calculated: aboveground biomass and crown area. Such methods can automate the process of creating tree inventory databases, while eliminating subjective bias when recording measurements.
The use of digital filters in the calculation of indicators of natural systems in geomodeling
Authors: Istomin E , Kolbina O , Sidorenko A , Yagotinceva N , Petrov Y 
Published: August 2021

Abstract
The use of digital filters is ubiquitous, but their use for predicting data from natural systems has always caused dubious results. This paper discusses the possibility of using the Kalman filter for predictive activities when processing geodata. Large amounts of accumulated information can open up new horizons for human activities, including when using geospatial data referencing. The results of the study are presented and conclusions are drawn about the possibility of using digital filters in the calculation of natural indicators.
Boosting the efficiency of hydrodynamic impact on a coal-rock massif employing the method of seismic tomography to control massif’s parameter
Authors: Tailakov O V , Makeev M P , Sokolov S V 
Published: August 2021

Abstract
The results of numerical modeling of a fracture system spatial development on a coal-rock massif under the hydrodynamic impact are presented. To set boundary conditions, an array of geophysical data obtained with a seismic survey method for the extraction panel roof was used. The parameters of typical geophones placement schemes in mine workings, sufficient for assessing the efficiency of directional hydraulic fracturing are substantiated. Satisfactory convergence of the results of numerical modeling of fracture systems spatial development with areas possessing different physical and mechanical properties revealed during seismic survey of the extraction panel impacted by hydraulic fracturing are presented.
Operator’s workplace virtualization and approaches assessment of its graphic implementation
Authors: Nikitenko M S , Kizilov S A , Ignatova A Yu , Remizov S V , Natura E S 
Published: August 2021

Abstract
The authors discuss objectives of creation of a virtual operator’s workplace. These objectives are connected with implementation of 3D virtual interface within the framework of hardware/software currently available on the market, and with general workplace ergonomics. A brief description for different approaches to the design and organization of a virtual workspace is given. The task to develop a test virtual “control panel” to study parameters of the virtual cockpit elements is described.
The influence of the pipeline system on the socio-economic development of oil and gas regions
Authors: Provornaya I V , Filimonova I V , Mishenin M V , Dzyuba Yu A , Chebotareva A V 
Published: August 2021

Abstract
In the article on the basis of the cluster, 20 oil and gas regions of Russia are allocated for which the level of pipeline provision is calculated. The group with a low level of transport security included mainly the regions of Eastern Siberia and the Far East. On the example of the ESPO and the “Power of Siberia” it is shown that the construction of pipelines favorably affects the socio-economic development of regions along the routes.
Investigation of the transition layer of the core – shell of ceramic matrix composites based on coal waste
Authors: Stolboushkin A Yu , Fomina O A 
Published: August 2021

Abstract
The study results of the chemical, particle size, and mineral compositions of the raw materials of ceramic samples (coal waste and clay) are presented. A model of the transition layer between the shell and the core of the ceramic matrix composite is provided. The technique for preparing multilayer ceramic samples imitating the phase boundary of a ceramic material of a matrix structure is described. The differentiated studies of the phase composition and microstructure of multilayer ceramic samples are presented. The interaction of the products of the core and the shell in the transition layer in ceramic materials of the matrix structure during firing is established.
The conception of developing unallocated fund of subsoil raw material resources base in the coal mining industry
Authors: Klishin V I , Pissarenko M V , Rogova T B , Shaklein S V 
Published: August 2021

Abstract
Coal mining industry raw material bases analysis of allocated, newly introduced and unsold subsoil reserve fund demonstrates a fast depletion of the reserves with favorable geological factors of mining which meet the requirements of traditional mining technologies. In the coming years meeting the demand on certain technological coal ranks (K, KZh, KC, KCN, KO, OC, TC, CC) cannot be provided without exploiting coal deposit sites that contain hard to recover reserves and without developing and implementing new mining technologies oriented on complex mining and geological conditions. It requires a special program for fulfilling scientific researches on the development of methodological approaches, technical and technological solutions and testing new technologies for hard to recover coal reserves which can provide rational subsurface resources utilization and protection.
Electrical resistivity tomography at the “roll along” profile in comparison with geochemical testing of the tailing dump (Salair, Kemerovo region)
Authors: Nataliya Yurkevich , Sofia Grakhova , Tatyana Fedorova , Dmitriy Kucher 
Published: August 2021

Abstract
Mining tailings are the source of a wide range of chemical elements in the environment. One of the main mechanisms of substance migration is the filtration of solutions into groundwater and the river network. In this paper, we consider the results of geophysical studies along the side of the tailings mine production (Salair, Kemerovo region) by the method of Electrical resistivity tomography (ERT). The aim of the research was to identify the leakage of industrial water from a hydraulic structure, as well as to compare the geoelectric parameters of the environment with the geochemical testing of solutions near the tailings. It was found that the direction of the underground fluid flow from the tailings can be traced using geophysical methods, as well as to show the exact anomalous drainage zone on the profile of ERT.
The resource regions resilience in the conditions of Industry 4.0. and the COVID-19 pandemic: theoretical and applied aspects
Authors: Goosen E V , Matveeva E V , Kagan E S , Nikitenko S M , Kavkaeva O N 
Published: August 2021

Abstract
Currently, global changes are taking place, accompanied by a change in the socio-economic structure, in these conditions, states and societies lose their resistance to stress and become especially “fragile”, unable to maintain the integrity of their economic and socio-political structures. Within the framework of this article, the authors developed an interdisciplinary concept of the concept of stress resistance, which is most fully manifested during periods of global crises such as the economic transition to Industry 4.0 and the COVID-19 pandemic, and also made an attempt to form indicators for assessing the stress resistance of regions in the new economic and socio-political realities. The problem of stress resistance is becoming especially relevant for the resource regions of Russia. The concept of stress resistance is studied from the standpoint of economic and socio-political approaches. Within the framework of this article, under the concept of resistance to stress, the authors consider the state of stability of all levels of government in relation to stressful situations in the economic, social and political spheres of society, as well as the ability to develop adaptive mechanisms based on forms of strategic partnership between the state and society, in particular civil society institutions. The aim of the study was to develop the main risk factors and factors-stabilizers of stress resistance at the regional level in the context of the global crisis, influencing the system of interaction between government institutions and society. The factors-stabilizers of stress resistance at the regional level are distinguished. Taking into account Industry 4.0 and COVID-19 in the Russian Federation, such “points of growth” may be changes in the modernization of medicine, support from the state for business and non-governmental organizations. Measures to provide stabilization measures to support various categories of the population were taken as a “point”, but quite justified measure to support the economic level of development of regional economies and stabilize the situation in the social sphere.
Development of the digital model of the loading and transport enterprise infrastructure in a coal mining region
Authors: Pristupa Yu D , Pavlova L D , Fryanov V N 
Published: August 2021

Abstract
An argument for developing an infrastructure digital model of the loading and transport enterprise in a coal mining region is presented on the example of Kuzbass in accordance with the natural resources of the coal basin, the existing transport and logistics infrastructure and the needs of the domestic and world coal market. Optimization of traffic flows from producer to consumer is the main direction for development of facilities of transport and logistics infrastructure at a loading and transport enterprise. The scheme of the transport and logistics infrastructure of the loading and transport enterprise was digitized. A computer program for cognitive modeling was developed based on the construction of a fuzzy cognitive map and the choice of an optimal graph scheme from a set of options according to a given criterion. The strength of the system impact on the concept, the strength of the concept impact on the system, the consonances of the concepts impact on the system and the system on concepts are taken as indicators for assessing the options for developing the transport and logistics infrastructure of the loading and transport enterprise. Based on the simulation results, the main significant factors-concepts were identified, which are ranked as follows: the coal market, internal control actions, seasonal phenomena, communication and signaling.
A study on the effect of the deformations in flexiblocks on the behavior of the vehicle axle suspension mechanisms
Authors: Alexandru C 
Published: August 2021

Abstract
This work deals with a study on the effect of the deformations in flexiblocks (bushings) on the behavior of the vehicle axle suspension mechanisms. The mechanism in study is a representatiove one for the structural group/class of mono-mobile axle suspension systems, namely the guiding mechanism by five points - on five spheres (so called 5SS). In a previous work, it was established that the rigid joint model for this class of mechanisms does not provide results close to the real flexible bushing model, reason for which the research in this paper is directed towards the identification of a theoretical model of joint which, at a lower complexity than that of the real model, would still provide viable results, in terms of axle guidance accuracy in the spatial movement relative to car body. In this regard, static and kinematic models were developed and analyzed by using the MBS (Multi-Body Systems) software solution ADAMS.
The effect of chitosan derived silver nanoparticles on mechanical properties, color stability of glass ionomer luting cements
Authors: Qasim Syed Saad Bin , Ali Dena , Soliman Mahmoud Shahat , Zafiropoulos Gregor-Georg 
Published: August 2021

Abstract
Glass ionomer cements (GIC) also known as polyalkenoate cements have been used as dental luting material for decades. However, there are certain limitations with respect to its biomechanical properties. Therefore, the aim of current investigation was to synthesize and characterize silver nanoparticles (SNP) using a green approach and incorporating the synthesized SNP in commercially available GIC formulation. Methodology. SNP were synthesized using a green approach of chemical reduction and analysed by spectroscopy and Transmission Electron microscopy. SNP reinforced GIC in 10, 30 and 50% formulations were assessed for microhardness, compressive strength, color stability and Nano-computerized tomography was used for pore analysis. Results. Results from UV–vis spectroscopy, Dynamic Light Scattering, Zeta potential, Transmission Electron Microscopy and Fourier Transform Infrared Spectroscopy revealed that the particles were spherical and polydisperse in nature with an average diameter of 122 nm. The synthesized particles had a positive surface charge of 74 mV. Their incorporation into the Glass ionomer cement (GIC) revealed non-significant results on microhardness and compressive strength. Significant color change was observed and Nano-CT revealed pores within the set cements. Conclusion. Nevertheless, the biosynthesized silver nanoparticles have much broader clinical application and can be used to reinforce properties of existing dental biomaterials. They can be conveniently synthesized by the biogenic route adapted in the current investigation. However, their addition to the luting cement still warrants further in-depth investigation.