bluuebunny/crossref_metadata_2025 huggingface dataset:
Neutrino spin precession and oscillations in transversal matter currents
Authors: Popov A. , Pustoshny P. , Studenikin A.
Published: January 2020

In this paper we considered semiclassical neutrino spin precession in a transversal matter current and quantum case of the neutrino spin oscillations in the mass and flavor bases induced by a moving media. In the first part we have verified, that even without presence of an electromagnetic field, in presence of a matter, when the transverse matter term is not zero, the neutrino spin oscillations can be induced. In the second part there were some calculations, that in the end led us to the evolution equations which include an effective Hamiltonian of the weak interactions. From these equations one can see the influence of the transverse component of a matter velocity on a spin oscillations and of the longitudinal component of a matter velocity on the neutrino energy spectrum.
Underwater Photometry System of the SNO+ Experiment
Authors: Singh Kalpana , Gorel Pierre , Hallin Aksel , Krauss Carsten , Petriw Zachary
Published: January 2020

The SNO+ experiment is a large-scale liquid scintillator-based experiment, adapting the Sudbury Neutrino Observatory (SNO) detector located at SNOLAB, Canada. The main physics goal is to investigate the Majorana nature of neutrinos through the search for the neutrinoless double-beta decay of 130Te. The camera system of SNO+ is designed to photograph calibration sources and triangulate their locations with an accuracy of a couple of centimeters. This will lead to better calibrations and more accurate physics measurements in SNO+. The camera system, when operated in a special mode with underwater lights turned on, also allows monitoring of the physical state of the detector. The optical calibration source was deployed in the water filled SNO+ detector in the summer of 2017. Pictures of the deployed source were taken using the camera system while the underwater lights were turned on. The triangulation analysis of the pictures gave us an opportunity to test the position accuracy of the deployed source in SNO+ using the camera system.
Extensive air showers event reconstruction using spatial and temporary particle distribution at Horizon-T experiment
Authors: Beznosko D , Yelshibekov K , Beisembaev R U , Beisembaeva E A , Beremkulov T , Iakovlev A , Jakupov S , Sheverdin A , Tagay Z , Uakhitov T , Vildanova M I , Zhukov V V
Published: January 2020

A newly completed (Oct. 2016) detector system of Extensive Air Showers (EAS) called Horizon-T (HT) is a part of Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences, which is located 32 km from Almaty at the altitude of 3340 meters above the sea level. Horizon-T is constructed to study Extensive Air Showers in the energy range above ∼1016 eV coming from a wide range of zenith angles (0° - 85°). The system currently has eight working and two under construction charged particle detection points separated by the distance more than a kilometer. The ability to record each detector response with accuracy of 2 ns gives HT ability to study the temporary structure of EAS disk and apply the results to the event reconstruction. The reconstruction is therefore based on chronotron (< 0.5 ns), spatial and temporary distribution of charged particles within the detected EAS event. In this paper, we will show the simulated time distribution of charged particles in the EAS disk vs. distance from the axis and the correspondence to the data. A flow of the reconstruction of standard EAS events and the event display is presented as well as recent HT results.
Polarization of cascade hyperons and antihyperons
Authors: Abramov V V
Published: January 2020

Polarizations of cascade hyperons (Ξ0 and Ξ−) and antihyperons are especially interesting because they are very sensitive to the mechanism of their production. Hyperon polarization for existing data is considered in framework of the model of chromomagnetic polarization of quarks (CPQ). Hyperon and antihyperon polarization predictions are presented for a wide range of c.m.s. energy

s

and Feynman variable xF
.
Light-Cone Sum Rules for Gravitational Form Factors
Authors: Anikin I. V.
Published: January 2020

We outline the developed approach within the light-cone sum rules at the leading order for calculation of the gravitational form factors related to the nucleon valence quark combinations. The predictions for the gravitational form factor D(t) (D-term contributions) have been presented.
A new extraction of the Boer-Mulders function
Authors: Christova E , Kotlorz D , Leader E
Published: January 2020

We extract the valence part of the nucleón Boer-Mulder (BM) function from the new COMPASS data on the unpolarized cosϕh
and cos2ϕh
asymmetries in SIDIS on deuteron for producing the hadron h and its antiparticle

h
¯

at azimuthal angle ϕh
. Our results, obtained with only standard assumption of factorization of the xB
(zh
) and transverse momentum dependences, differ significantly from the presently published data on the BM function, obtained using a model assumption of proportionality to the better known Sivers function. This suggests that the published results on the BM function should be reconsidered.
Comparative study of proton and positive kaon interactions with carbon: hint of new physics like partial restoration of chiral symmetry in nuclei
Authors: Eliseev S. M.
Published: January 2020

Concerning the scattering of K+ - mesons on nuclei, the explicit discrepancy between experimental data and optical model calculations is a longstanding problem and none of the conventional medium effect corrections improves significantly the agreement with the data. In this paper the cross sections for the reactions K++12C at incident momenta of the kaon P
lab
< 800 MeV/c are calculated on the basis of Glauber’s high-energy approximation. The noneikonal corrections, Fermi motion effect and both Pauli and dynamic short-range correlations were incorporated in the Glauber approach for nuclear collisions. The influence of all these corrections on the calculation of the cross sections for the interactions of kaon with nucleus is discussed. The full calculations is compared to available data. The corrections seem to fail in reproducing the experimental data. Our results is compared to optical model calculations. We show that both our model and optical model fails to give a satisfactory description of K+-nuclei cross sections. Different attempts to remove this discrepancy with the in-medium effects taken into account are discussed.
Exclusive processes and GPDs
Authors: Goloskokov Sergey
Published: January 2020

We investigate the exclusive vector meson production (VMP) which is an essential reaction to analyse the General Parton Distributions (GPDs). The possibility to study VMP at NICA is discussed. The other important process is the exclusive Drell-Yan (D-Y) production in the proton-proton reaction, which is determined by two GPDs. These reactions can be studied at NICA and give an additional excess to GPDs.
Particle Polarization and Structure of Vortical Field in Relativistic Heavy-Ion Collisions
Authors: Ivanov Yu. B. , Toneev V. D. , Soldatov A. A.
Published: January 2020

We review studies of vortical motion and the resulting global polarization of Λ and

Λ
¯

hyperons in heavy-ion collisions within 3FD model. The 3FD simulations indicate that energy dependence of the observed global polarization of hyperons in the midrapidity region is a consequence of the decrease of the vorticity in the central region with the collision energy rise because of pushing out the vorticity field into the fragmentation regions. At high collision energies this pushing-out results in a peculiar vortical structure consisting of two vortex rings: one ring in the target fragmentation region and another one in the projectile fragmentation region with matter rotation being opposite in these two rings.
Cross section investigation in dp breakup reaction at the intermediate energies
Authors: Janek M , Ladygin V P , Gurchin Yu V , Isupov A Yu , Karachuk J-T , Khrenov A N , Kurilkin P K , Livanov A N , Mezhenska O , Piyadin S M , Reznikov S G , Terekhin A A , Vnukov I E
Published: January 2020

The dp breakup reaction has been investigated by the scintillation detectors placed at the vicinity of Internal Target Station (ITS) of Nuclotron. Data have been obtained at the angles of 19° - 54° in the laboratory frame at the deuteron energy of 300 - 500 MeV in a various detector configurations in which the sensitivity to the three nucleon correlations and relativistic effects are assumed. Preliminary results of the five fold differential cross section for particular detector configurations of the dp breakup reaction at 400 MeV of deuteron energy have been obtained.
Spectra and polarizations of prompt J/ψ at the NICA within collinear parton model and parton Reggeization approach
Authors: Karpishkov A. V. , Nefedov M. A. , Saleev V. A.
Published: January 2020

We study prompt production of J/ψ at the energy range of the NICA collider within the parton Reggeization approach (PRA) applying the non-perturbative QCD (NRQCD) factorization model for

c

c
¯

→
J
/
ψ

transition. We calculate transverse momentum distribution for direct J/ψ as well as for J/ψ from decays of higher-lying charmonium states. Production of polarized J/ψ is studied and parameter λθ
as a function of transverse momentum is calculated. The comparison with predictions obtained in calculations based on the next-to-leading approximation of the collinear parton model is done.
Bjorken sum rule with analytic QCD coupling
Authors: Ayala C , Cvetič G , Kotikov A V , Shaikhatdenov B G
Published: January 2020

We present details of study of the polarized Bjorken sum rule

Γ
1

p
−
n

(

Q
2

)

carried out recently in [1]. Four QCD coupling versions are considered: perturbative QCD (pQCD) in the

MS

¯

scheme, Analytic Perturbation Theory, and 2δ and 3δ analytic QCD

(

A
QCD

)

versions. In contrast to pQCD, these QCD variants do not have Landau singularities at low positive Q
2. In general, when 2δ and 3δ QCD coupling is used the fitted curves give the best results.
Hadron polarization in strong magnetic field
Authors: Luschevskaya E.V. , Teryaev O.V. , Ishkuvatov R.A.
Published: January 2020

The magnetic dipole polarizabilities and hyperpolarizabilities of the vector ρ
0 and ρ
± have been calculated. The new characteristic of the QCD vaccum in the strong magnetic field called tensor polarizability has been introduced, which is related to the tensor polarization. The contribution of the dipole magnetic polarizabilities to the tensor polarization of the vector mesons in the external abelian magnetic field has been explored.
Search for spiral structures in heavy ion physics and astrometry
Authors: Martynova Anastasia Y. , Teryaev Oleg V.
Published: January 2020

The appearance of helical structures in astrophysics and heavy-ion collisions (HIC) physics is discussed and the interplay between these two branches of physics is investigated. As far as in HIC the data are aviable in momentum space only, the assumption that the Milky Way has a spiral structure in the velocity space is checked. We find the spiral structures in phase and coordinate spaces from the rotation curve of our Galaxy include contribution of different parts of Galaxy, as thin disk, bulge and spherically symmetric Dark Matter Halo (Navarro-Frenk-White density profile). The helical structures in coordinate and velocity space are found and compared. An algorithm for searching helical structures has been developed and tested on logarithmic spiral with some random background.
Frequency domain method of the search for the electric dipole moment in a storage ring
Authors: Aksentev A E , Senichev Y V
Published: January 2020

A new method for searching for the electric dipole moment (EDM) of the deuteron and other nuclei is presented. When trying to measure the EDM in a storage ring environment, magnetic dipole moment (MDM) spin precession due to machine imperfections becomes the primary source of systematic error. The proposed method aims at providing a solution to the machine imperfection problemas well as circumventing the geometric phase error. The method is based on estimating the combined MDM + EDM spin precession frequency, in which the MDM contribution is due only to field imperfections. The MDM term is canceled in the final statistic by adding frequency estimates from cycles with counter-circulating beams. Spin precession rate depends on the particle’s effective Lorentz factor; the proposed method’s core feature is a procedure for equalizing the effective Lorentz factors of the clockwise and counter-clockwise circulating beams, thus enabling the cancelation.
Similarity and specifics of polarization in hadronic and heavy-ion collisions
Authors: Teryaev Oleg V , Zakharov Valentin I
Published: January 2020

The basic ingredients of baryon polarization emerging in the collisions of hadrons and heavy ions are compared. The apperance of the pseudovector as the normal to reaction plane, axial anomaly, as a spin-orbital interaction, and dissipation, as imaginary phase are discussed. The interplay beyween chenical potential and Regge behaviour and the hadronic analog of viscosity are outlined. The experimental studies of transition of hadrons to heavy ions, in particular at NICA (JINR) is discussed.
Vorticity structure and polarization of Λ hyperons in heavy-ion collisions
Authors: Zinchenko Aleksei , Sorin Alexander , Teryaev Oleg , Baznat Mircea
Published: January 2020

Simulations of peripheral Au+Au collisions at NICA energies are performed in the PHSD transport model. The properties of vorticity field are studied at different impact parameters. Quadrupole structures of the vorticity field in all planes are obtained. A thin layer of large vorticity is found at the boundary of the fireball, the so-called vortex sheet. The effect of helicity separation is detected. Calculation of hyperon polarization in thermodynamic and anomalous models is performed.
Direct reconstruction of the pp – elastic scattering amplitudes at U70
Authors: Bogdanov A A , Chetvertkova VA , Kozelov A V , Ladygin V P , Mochalov V , Nurusheva M B , Okorokov V A , Runtso M F , Vasiliev A N
Published: January 2020

The direct reconstruction of pp elastic scattering amplitudes at the SPASCHARM experiment is discussed. The observables are expressed in terms of invariant amplitudes. These amplitudes are deduced analytically by solving bilinear relations.

Monte-Carlo simulations of elastic scattering as well background reactions were carried out. Elastic and diffraction interactions of protons were simulated by using PYTHIA generator for 16 GeV incident protons, designed Setup geometry and the resolution of the detectors. The criteria to select elastic processes are discussed and presented. Two-dimensional distributions of the product of the tangents of the polar angles of the recoil particle and the scattered particle versus difference of the azimuth angles of these particles, were obtained. The estimated ratio of the signal to background S/(S+B) is about 0.99.
The results of the deuteron beam polarization measurement for dp-elastic scattering reaction at 270 MeV energy
Authors: Skhomenko Ya T , Ladygin V P , Gurchin Yu V , Isupov A Yu , Janek M , Karachuk J-T , Khrenov A N , Kurilkin P K , Livanov A N , Piyadin S M , Reznikov S G , Terekhin A A , Tishevsky A V , Averyanov A V , Belov A S , Chernykh E V , Enache D , Fimushkin V V , Krivenkov D O
Published: January 2020

The current deuteron beam polarimetry at Nuclotron is provided by the Internal Target polarimeter based on the use of the asymmetry in dp- elastic scattering at large angles in the cms at 270 MeV. The upgraded deuteron beam polarimeter has been used obtain the vector and tensor polarization during 2016/2017 runs for the DSS experimental program. The polarimeter has been used also for tuning of the polarized ion source parameters for 6 different spin modes.
Upgrade of the polarimeter at the Internal Target Station at the Nuclotron
Authors: Terekhin A. A. , Ladygin V. P. , Gurchin Yu.V. , Isupov A.Yu. , Khrenov A. N. , Kurilkin P. K. , Ladygina N. B. , Piyadin S. M. , Reznikov S. G. , Volkov I. S. , Janek M. , Livanov A. N. , Skhomenko Ya. T. , Tishevsky A. V. , Averyanov A. V. , Bazylev S. N. , Chernykh E. V. , Krivenkov D. O. , Slepnev I. V. , Slepnev V. M. , Shutov A. V. , Vnukov I. E.
Published: January 2020

The results of the Polarimeter upgrade at the Nuclotron internal target are presented. This Polarimeter is intended for experiments to study of the spin structure of two-nucleon and three- nucleon short-range correlations. The measurements are performed in the frame of the DSS project. The simulation of the pd-elastic and pp-elastic scattering for 500 - 1000 MeV proton energy to optimization of the experimental setup is performed.
About toroidal soliton-particle of extremal space-time film
Authors: Chernitskii Alexander A.
Published: January 2020

Nonlinear field model of extremal space-time film is considered. Its space-localized solution in toroidal coordinates with periodic dependence in time is investigated. A field configuration having a form of the twisted lightlike soliton moving along the ring is considered. An iterative algorithm for obtaining the solution in the form of formal power series in one toroidal variable is proposed. It is discovered that the time dependence in the toroidal solution has a deeply embedded character. Thus the full energy and angular momentum of the solution converge at space infinity.
Nonperturbative extension of perturbative quantum chromodynamics and fractal dimension of space as a confinement phase transition order parameter
Authors: Makhaldiani Nugzar
Published: January 2020

Infrared extension of perturbative quantum chromodynamics given. Phenomeno-logical quarkonium potential interpreted as Coulomb potential of point charge with dynamically changing dimension of space.
Radiative corrections to QCD SR for meson distribution amplitudes up to

O(

α
s
2

β
0

)
Authors: Mikhailov S V , Volchanskiy N
Published: January 2020

We obtain QCD radiative corrections to distribution amplitudes of π and ρ mesons within QCD sum rules. To this end, we calculate correlators of two different composite vertices at order

O

(

α
s
2

β
0

)

, where β
0 is the first coefficient in the expansion of QCD ϒ-function.
Molecular dynamics simulation of structural transformations in Cu-Al system under pressure
Authors: Polyakova P V , Nazarov K S , Khisamov R Kh , Baimova J A
Published: January 2020

Aluminium-copper (Al–Cu) compounds are one of the most-studied precipitation-strengthened alloy systems. Mechanical properties of Cu-Al systems considerably dependent on the phase composition. Excellent properties primarily depend on the intrinsic microstructures formed during processing stages, particularly the precipitated phases or the so-called intermetallics, along with various defects and impurity segregation, have important influences on the composite strength. Study of fabrication techniques to obtain composites with improved mechanical properties, careful investigation of phase composition, dynamics and kinetics are of high importance. Molecular dynamics simulation is used to study on the atomistic level the process of formation of Al/Cu composite from two initially separated crystals by severe plastic deformation. The proposed model is the simplification of scenario, experimentally observed previously. However, even in such a simple model, understanding of the mechanisms underlying in the process of composite formation can be obtained.
Density functional study of the electronic properties of doped C20 fullerene
Authors: Salem M A
Published: January 2020

Density functional theory calculations have been performed for structures, stability and electronic properties of C20 fullerene doped by hydrogen, fluorine, and chloride atoms. Doping provides efficient tuning of frontier orbitals and electronic distribution in the pristine C20. Dipole moment, HOMO and LUMO energies as well as energy gaps were calculated and analysed. Hydrogen and chlorine dopants provide the minimal value of the energy gap. Based on presented results, on can chose appropriate radical to achieve the desired value of the band gap, needed for concrete solar cell systems or nanoelectronic devices.
Focus on changing fire regimes: interactions with climate, ecosystems, and society
Authors: Rogers Brendan M , Balch Jennifer K , Goetz Scott J , Lehmann Caroline E R , Turetsky Merritt
Published: January 2020

Fire is a complex Earth system phenomenon that fundamentally affects vegetation distributions, biogeochemical cycling, climate, and human society across most of Earth’s land surface. Fire regimes are currently changing due to multiple interacting global change drivers, most notably climate change, land use, and direct human influences via ignition and suppression. It is therefore critical to better understand the drivers, patterns, and impacts of these changing fire regimes now and continuing into the future. Our review contributes to this focus issue by synthesizing results from 27 studies covering a broad range of topics. Studies are categorized into (i) Understanding contemporary fire patterns, drivers, and effects; (ii) Human influences on fire regimes; (iii) Changes in historical fire regimes; (iv) Future projections; (v) Novel techniques; and (vi) Reviews. We conclude with a discussion on progress made, major remaining research challenges, and recommended directions.
Improved K-means Algorithm Based on Threshold Value Radius
Authors: Song Jiaqi , Li Fei , Li Ruxiang
Published: January 2020

K-means algorithm is a classical clustering algorithm, which needs to specify K value artificially and chooses the initial clustering center randomly. However, it is easy to fall into local optimal solution. In order to overcome the shortcomings of K-means algorithm, an improved algorithm based on threshold value radius is proposed in this paper. The initial clustering center and threshold radius are determined automatically by the average value of Euclidean distance between data. The experimental results show that the method proposed can effectively and accurately overcome the shortcomings of the traditional K-means algorithm.
Performance Analysis of Long-Time Coherent Integral Acquisition Algorithm for Weak GNSS Signals
Authors: Gao Faqin
Published: January 2020

Autonomous navigation places an extremely high demand on the acquisition sensitivity of the global navigation satellite system (GNSS) receivers. To increase the efficiency and sensitivity of the acquisition algorithm of GNSS weak signal, we improve the acquisition algorithm named Improved Acquisition Algorithm with Doppler Frequency Compensation (IAADFC) proposed in our previous study. The bottleneck restricting the performance improvement of the IAADFC algorithm is that it is difficult to estimate Doppler frequency and navigation message bit flip estimation in a very weak signal environment. We provide a detailed analysis and comparison among the proposed IAADFC algorithm, non coherent integration (NCI) algorithm. Simulation results demonstrate that our IAADFC acquisition algorithm can effectively realize the acquisition of GNSS signal with a singal-to noise ratio that down to 15 dB•Hz which is the current most advanced level of signal acquisition.
Practical Application Analysis of 3DMAX in Interior Design
Authors: Xing Song , Wang Mo
Published: January 2020

With the development of society and technology, new technologies in various fields are emerging one after another. 3DMAX is one of the world’s top 3D software products from Autodesk, plays an important role in all design fields. The application of 3DMAX in the field of interior design is conducive to accurately and intuitively transforming the designer’s creative ideas and design concepts, effectively improving the quality and efficiency of interior design projects. This paper is based on the relevant overview of 3DMAX software applications, analyzing and studying the practical application of 3DMAX in interior design.
Research on Data Privacy Protection of Internet of Vehicles Based on Differential Privacy
Authors: Luo Xue , Wang Juan , Xu Jing , Shen Mengting
Published: January 2020

The private data of intelligent vehicles connected to the Internet are easy to leak through the network. However, all existing solutions require the intervention of trusted third parties. In reality, even the confidentiality commitment provided by vehicle service providers is questioned by users. Aiming at this problem, a local differential privacy algorithm is introduced to design a data privacy protection scheme adapted to the characteristics of Internet of vehicles. The original data are only stored locally, and all the statistical data provided to the collector are disturbed. On the basis of ensuring the necessary data collection of the service center, it is guaranteed by mathematical principle that the collector cannot reverse the original data and the original data provider. The experimental results show that when the number of users is 10 million, the maximum relative error of frequency estimation is 0.0031 and the maximum relative error of mean estimation is 0.00006, which are far less than the tolerance value of 0.01, indicating that the scheme guarantees the application of Internet of vehicle safety situational awareness and other applications that need a lot of data support on the basis of protecting user privacy.
The Periodic Solution of a Ratio-dependent Food Chain Model with Stock Term
Authors: Wang Hui , Han Guichun , Wu Ying
Published: January 2020

A ratio-dependent food chain model with stock term is investigated in this paper. By using continuation theorem based on coincidence degree theory, we establish sufficient criteria for the existence of positive periodic solution.
Discussion on Urban Black Odor Water Body Treatment and Long-term Management and Maintenance
Authors: Yu Lintang , Tang Zhongya , Ji Junjie , Song Yujun
Published: January 2020

In view of the increasingly serious pollution of urban rivers, seasonal or end-age black odor, not only affects the urban landscape, but also affects the daily life of the surrounding residents, in order to eliminate urban black and smelly rivers and improve the quality of urban water environment. This paper proposes the treatment technology of urban black and odorous water from the aspects of controlling source pollution, water pollution control and ecological restoration technology. Strengthen management from the long-term improvement system of water quality and policy guarantees to achieve the long-term clear effect of urban water bodies.
Optimization for Fatigue Pressure Testing of Metal Pressure-Containing Envelopes Based on Scenario Analysis
Authors: Wang Changjin , Qian Xinbo
Published: January 2020

For reliability analysis of hydraulic system, it is important to achieve the fatigue characteristic (SN curve) for hydraulic component. However, it needs to improve the testing pressure level number and test samples to improve the testing accuracy. However, there is little research about to optimize the energy consumption while efficiently ensuring the testing accuracy. Moreover, uncertainty does exit for the testing accuracy estimation because of small sample size for hydraulic system. Therefore, a scenario analysis-based framework is proposed to optimize both the energy consumption and test accuracy by stochastic multi-objective programming. The case study shows the efficiency of the proposed method.
ECG Heartbeat Classification Based on ResNet and Bi-LSTM
Authors: Zhou Yang , Zhang Haoxi , Li Yuan , Ning Guangjian
Published: January 2020

As a reliable cardiovascular system, ECG has been widely used in the detection of heart rhythms. This paper presents an attention-based ResNet processing of ECG data. Respectively are MIT and PTB Diagnostics datasets. The model is prominent in both data sets. And the accuracy in MIT datasets is 96.2%. And in PTB datasets the accuracy is 99.6%.
A Summary of Research on Passenger Flow Simulation Technology in Rail Transit Station
Authors: Xue Hongjiao , Chen Junjie , Zhang Hong
Published: January 2020

From macroscopic and microscopic aspects, the research status on passenger flow simulation technologies are summarized. The macro-model mainly contains the system dynamics model and the hydrodynamic model. And the macro-model mainly introduces the magnetic model, the queuing theory model, the cellular automaton model and the social force model. Through comparative analysing the simulation models mentioned, this paper proposes the model suitable for the station simulation in peak hours.
Design and Implementation of Self-Expanding System of Unmanned Vehicles Group Based on Signal Strength
Authors: Chen Yajie , Qin Zhen , Zhang Lei , Li Aijing , Wang Hai
Published: January 2020

Unmanned vehicles are widely used in the military field. They are equipped with a wide variety of sensors so that they can flexibly complete tasks such as enemy surveillance. At present, unmanned vehicles generally control the movement by an obstacle avoidance system or an ultrasonic ranging system without considering the signal strength, which may cause poor communication. In this paper, we present a model based on signal strength for unmanned vehicles self-expansion to solve the problem. In the experiment, we consider and measure the relationship between signal strength, network bandwidth and packet loss rate, and select the optimal signal strength threshold. By applying this model, the vehicles group can realize the self-expansion and multi-hop communication of the vehicles in the network, which make the vehicles reach the maximum coverage areas and the optimal communication quality.
Lump Soliton Model on Chinese Microblog Public Opinion
Authors: Wu Weiwei , Chen Yan , Wang Decheng
Published: January 2020

There has been a tremendous rise in the growth of Chinese Microblog--- Sina Weibo in the past few years. Sina Weibo contains many interesting hot issues. In particular, the trend of some hot topics can be described by the soliton wave model based on some hypothesis and parameter settings. The theoretical strategies to control the trend of hot topics are stated by employing the lump soliton solution theory of the KdV equation and KP equation.
Fault Detection Platform for Wireless Sensor Networks
Authors: Zi Shuangfei , Lin Weilan , Xiao Jinchao , Lin Zifan , Fan Zhiyi
Published: January 2020

To point at the errors in development of wireless sensors network engineering as well as deal with the difficult issues of fast positioning and debugging, the Non-Intrusive fault detection platform is designed and consists of three parts, which includes the tested sensor networks, testing networks and testing tools. Besides, the mentioned parts can play a role in the development of network protocol, realizing the function of time synchronization testing, messages analysis, power consumption testing, reliability testing and delay test, etc. Through the detection platform can the long chain network be tested in the development process. The experimental results verify the fact that the validity of the detection platform performs in functions of time synchronization testing, reliability testing, power consumption testing and message analysis, even handling the problems of rapid locating and debugging.
The Effects of Pheophytin a on Absorption Properties of Phytoplankton in Dalian Bay, China
Authors: Wang Lin , Jiang Lingling , Xing Xiaogang , Chen Yanlong , Meng Qinghui
Published: January 2020

We examined the effects of pheophytin a (Phe-a) on absorption properties of phytoplankton obtained from the red tide prone area of Dalian Bay in the North Yellow Sea, China, in June 2007 and July 2011. When the proportion of Phe-a relative to chlorophyll-a (Chl-a) increased, the absorption peak in the blue-violet region shifted from 438nm to 409nm. The relationship between blue-violet absorption maximum and Phe-a concentration is more tightly correlated than the relationship between blue-violet absorption maximum and Chl-a concentration. However, we found the opposite results for the red absorption maximum. These findings suggest that Phe-a mainly effects the blue-violet absorption maximum, while Chl-a primarily controls the red absorption maximum. Our results are determined by specific absorption coefficients of Phe-a and Chl-a in living algae cells. A multivariate linear regression analysis revealed that the specific absorption coefficients of Phe-a accounts for the absorption peaks at 407 nm and 673 nm, and specific absorption coefficient of Chl-a accounts for the absorption peaks at 440 and 673 nm, furthermore, the specific absorption coefficients of Phe-a are much larger than those of Chl-a in the blue-violet region, but they are lower in the red region.
Rapid Determination of Minced Beef Adulteration Using Hyperspectral Reflectance Spectroscopy and Multivariate Methods
Authors: Guo Bingqing , Zhao Jinling , Weng Shizhuang , Yin Xun , Tang Peipei
Published: January 2020

This work aimed to assess the potential of hyperspectral reflectance spectroscopy for minced beef adulteration. For this, 30 samples of pure minced beef along with 90 samples adulterated beef at different levels were prepared and analyzed. Multivariate methods were used for spectral analysis to classify adulteration types. The best result was obtained by random forest (RF), where the accuracy of classification in prediction set was 87.78%. Considering the redundant information of reflectance spectra, the optimal wavelengths were selected by successive projection algorithm (SPA) to improve robustness. Selected important wavelengths models have a better classification effect than full wavelengths models. The optimal model developed by RF for detecting adulterantion types achieved an accuracy of 96.87% in prediction set with selected wavelengths. Accordingly, hyperspectral reflectance spectroscopy with multivariate methods can provide the accurate and rapid detection of minced beef adulteration.
Atrial Fibrillation Detection Algorithm Based on Manual Extraction Features and Automatic Extraction Features
Authors: Shen Mengting , Zhang Luqiao , Luo Xue , Xu Jing
Published: January 2020

Atrial Fibrillation is a common arrhythmia. RR interval irregularity and P wave disappeared and replaced by continuous f-wave is the two important ECG manifestations of atrial fibrillation. RR interval irregularity can also be reflected in other types of arrhythmia, P Wave or f wave is a weak signal, its feature point detection is difficult and shape features are difficult to grasp. Therefore, this paper proposes a method combining manual extraction features and neural network extraction features for atrial fibrillation detection. Experiments were performed using the MIT-BIH atrial fibrillation database. The ECG signals were first processed into equal-length data, and then the 180 dimensional time-frequency domain features were manually extracted and combined with the improved 128 dimensional features extracted by the neural network. The extracted feature input integration model, the sub-model includes Decision Tree, Random forest, GBDT, XGBoost, LightGBM.In the final experiment, the stacking model was used. The accuracy, accuracy, recall rate, F1 and AUC were 99.1%, 98.9%, 98.9%, 98.9%, and 99.4%. This method is better than the single model, which provided a very good measure for detecting atrial fibrillation.
HRPGAN: A GAN-based Model to Generate High-resolution Remote Sensing Images
Authors: Sun Hai , Wang Ping , Chang Yifan , Qi Li , Wang Hailei , Xiao Dan , Zhong Cheng , Wu Xuelian , Li Wenbo , Sun Bingyu
Published: January 2020

Generative adversarial networks (GAN) has been mainly used in the generation of natural images such as MNIST, CIFAR10 as well as Imagenet datasets and achieves satisfying generation results. However, GAN always fails in generating high quality high-resolution remote sensing images because remote sensing images are large in size and have various ground objects. To address this issue, a novel framework called High-Resolution PatchGAN (HRPGAN) is introduced in this paper. The structure of HRPGAN follows PatchGAN, but the batch normalization layers are removed and the ReLU activation is replaced by the SELU activation. In addition, a new loss function consisting of the adversarial loss, perceptual reconstruction loss and regularization loss is used in HRPGAN. Experiment results show that the proposed HRPGAN model generates the more diverse and lifelike images in HR remote sensing generation than Bicubic method and TGAN model.
Optical Machine Remote Sensing Platform and Its Thermal Field Simulation Analysis
Authors: Liu Hao , Zhou Xiaoqin , Liu Qiang , Ma Runda , Lin Jieqiong
Published: January 2020

The article introduces a three-axis aerial remote sensing imaging platform that can flexibly and accurately acquire ground target images in the air. Then it analyzes the impact of various complex conditions on the imaging quality, and finds that temperature change is the key factor affecting the imaging quality of the aerial remote sensing platform. The thermal field analysis of the designed optical lens part of the aerial camera was carried out. The thermal field analysis of the lens model in the finite element analysis software was used to extract the displacement vector of each node of the lens under different temperature fields. The mirror data is fitted using the Zernike polynomial program written in the matlab software. And the Zernike polynomial program brings the coefficients of the obtained zernike polynomial into the optical design software zemax for image quality evaluation, and completes the thermal field analysis of the optical system. Do the foundation for further research.
Response of Vegetation Restoration to Water Resources Transfer Policy in Arid Watersheds, Northwestern China
Authors: Fang Xiaoqian , Wang Jiayi , Cao Yu
Published: January 2020

Minqin Oasis is the irrigation area in the lower reaches of the Shiyang River in the Hexi Corridor. Since the beginning of this century, in order to prevent Minqin Oasis from further degrading due to lack of water, Gansu Province began to construct water transfer projection. In order to study the impact of water resources allocation policy on the ecological restoration of such ecologically fragile areas, this study took Minqin Oasis as the research object, and took Shuangta Irrigation area, which is in the Shule River Basin and similar to Minqin Oasis except for water transfer policy, as the contrast. Based on EOS MODIS NDVI data and runoff data from hydrological station, combined with remote sensing and GIS technology, using spatial analysis and regression analysis and other research methods, this paper analyzed the spatial and temporal characteristics of vegetation changes in the study area from 2000 to 2016, and the response of vegetation changes to water resources changes. The analysis results showed that, the water transfer policy increased the water resource of Minqin Oasis, and the dynamic change of vegetation in Minqin Oasis had a good response to the water transfer policy.
Earthquake Knowledge Graph Constructing Based on Social Intercourse Using BiLSTM-CRF
Authors: Sun Xiaoqing , Qi Li , Sun Hai , Li Wenbo , Zhong Cheng , Huang Yiliang , Wang Ping
Published: January 2020

Nowadays, the earthquake has become a very serious topic. The earthquake-related information always appears first in social media. Constructing an earthquake knowledge graph can help dealing with earthquake news social media text data. This paper proposed the BiLSTM-CRF (Bi-directional Long Short Term Memory-Conditional Random Field) model to construct earthquake knowledge graph using news text data. The BiLSTM-CRF model identified the entities and then writes entities and their types to the table so that the entities and relationships between entities can be extracted for earthquake. The entities and relationships between entities have been combined with the form of RDF (Resource Description Framework) to construct earthquake knowledge graph on Neo4j database.
A Study on Construction Plan of the Intelligent Home Supply Chain Integration Service Platform in the North of Zhejiang
Authors: Shen Yuyan , Qian Yan
Published: January 2020

This paper has combined theopportunity of Zhejiang Province to develop the modern supply chain, as the double factors of endogenous and external demands, the home city has met the urgent need to improve development, based on Haiyan convenient transportation and good location advantages, constructZhebei Intelligent Home Supply Chain Integration Service Platform. Throughthe creation of a characteristic commercial complex, aim to become a characteristic commercial complex through the overall transformation and upgrading of the market. The construction of Zhebei Intelligent Home Supply Chain Integration Service Platform is conducive to optimize the investment environment of Haiyan and enhance the competitiveness of Haiyan City.
Research on Roll Attitude Control of UAV Based on Active Disturbance Rejection Control
Authors: Sun Zonghua , Wu Liaoni , Guo Zhiming , Zhang Hanqi
Published: January 2020

The roll attitude control of small high-speed unmanned aerial vehicle (UAV) is very difficult compared to the conventional low-speed UAV. The dynamic pressure is large and the moment of inertia is too small, which cause the aileron is sensitive to manipulation. The roll attitude may oscillate due to the actuator rate limiting. In response to this feature, the active disturbance rejection control (ADRC) is added to compensate the nonlinear part of the system, so that the system is close to an integral link. The problem of the actuator rate limiting can be solved by tuning the gain of the angular rate control to change the system bandwidth. On the other hand, the rolling motion is, in general, coupled from the yawing and sideslip motions. ADRC can decouple the roll channel and the yaw channel, solving the nonlinear problem of control. Combination with the requirements of frequency and time domain, design the roll attitude controller. The UAV nonlinear simulation results show that the roll attitude control based on ADRC meets the flight control requirements.
Finance Industry Network Structure of Guangdong-Hong Kong-Macao Greater Bay Area
Authors: Cao Huashen , Xu Yanli
Published: January 2020

This paper applies social network analysis methods to study the network structure of the finance industry in the Guangdong-Hong Kong-Macao Greater Bay Area. The paper applies gravity model to measure the connections intensity of financial industry, and analyze the network structure by social network method of networks visualization, centrality analysis, and cohesive subgroups. The results are as follows : (1) the development of the finance industry in the Greater Bay Area is gradually balanced; (2) the centers of the finance industry network in the Greater Bay Area are Guangzhou and Shenzhen, followed by Dongguan, Foshan, and Hong Kong; (3) finance industry network structure in the Greater Bay Area can be divided into five major subgroups, the main subgroups being the one of Guangzhou and Foshan, the one of Shenzhen and Hong Kong, and the one of Macau and Zhuhai. This paper finally concluded that the finance industry network structure in the Greater Bay Area is centered in Guangzhou and Shenzhen, and that Guangzhou, Shenzhen, and Hong Kong are closely connected, and other cities are loosely connected.
Dynamic Changes of Aboveground Biomass of Vegetation in Qaidam Basin
Authors: Du Yu’e , He Weiguo , Zhou Jianping , Ma Songyao , Yuan Jun , Wang Yagang
Published: January 2020

In order to monitor the temporal and spatial dynamics of vegetation in the Qaidam Basin, the ground-based vegetation biomass model of the basin was established by using basin ground measurements data during 2016-2018 and NDVI of MOD13Q1: Y=0.0002X2-0.863X+2052.4(R2=0.7656, P<0.01), and using this model to estimate the long-term aboveground biomass data set of the vegetation of basin. Above-ground biomass of vegetation is mainly low-yield vegetation of less than 1500 kg/hm2, followed by vegetation of 1500-3000 kg/hm2, the area of which accounts for less than 10% of the total vegetation area, and the vegetation of the other levels is very small, only scattered, High-yield vegetation which is greater than 6000 kg/hm2 is distributed in the southeast of the basin and in the alpine mountains around the basin
Research on Planning and Design of Mountainous B&B Based on Geographic Information System
Authors: Shi Yanlei , An Yonggang , Huo Pengfei , Zhang Lisheng
Published: January 2020

In recent years, the rise of homestay tourism has brought great benefits to the tourism industry, and the tourism of the hotel has come to a new stage. At present, many mountainous areas in China have abundant natural resources and free houses, which are suitable for the development of B&B tourism. However, there are few studies on the planning and design of mountain-type B&Bs. Based on the spatial information system analysis of a mountainous area in China, this paper combines resource evaluation to design and provide a scientific basis for the planning and design of mountain-type B&B.
Design and Research on Visual Image of Rural Tourism Brand in Pinggu District of Beijing under the Background of Rural Revitaliation
Authors: Xue Caochen , An Yonggang , Huo Pengfei , Zhang Lisheng
Published: January 2020

Brand visual image plays a very important role in modern tourism marketing, and it is an important channel for tourists to obtain tourism destination positioning. It can not only provide consumers with directional information of tourism destination, but also help the development of local industry and the sale of products. Based on the analysis of the role of visual image design in the shaping of rural tourism brand image, combined with the background of Rural Revitalization policy and the characteristics of rural tourism brand image, this paper constructs the model of rural tourism brand image, and puts forward the promotion strategy of rural tourism brand image.
Burner rim geometry effect on flame stability
Authors: Al-Naffakh Jameel , Al-Fahham Mohammed , Abed Qahtan Adnan
Published: January 2020

We studied a swirl burner in atmospheric pressure combustion system with different burner lengths to burner rim diameter ratios (L/D). Three ratios, of L/D 1, 2 and 3, were used to investigate the effect of the burner’s geometry on the stability window. The results show that the position of the flame front stabilization changes with L/D ratio. The flame front stabilizes closer to the burner rim as the length of the burner is increased. The equivalence ratio of the mixture was taken as constant for the comparison’s sake. The flame stabilizes closer to the rim with an increase of the rim length.
Path tracking and backstepping control for a wheeled mobile robot (WMR) in a slipping environment
Authors: Hadi Nabil H , Younus Kawther K
Published: January 2020

This work studies the motion of a two-wheeled differential drive mobile robot by presenting the kinematic and dynamic model of a nonholonomic wheeled mobile robot (WMR) with and without slip effect. The traction forces are derived and a control law designed using the backstepping method to drive the WMR to the desired trajectory. The parameters of the kinematic and dynamic controllers are tuned and modified to reach the desired performance. In addition, the input torque is controlled to avoid slip occurring. Simulation results show the effectiveness of the proposed control algorithm that is demonstrated by applying these controllers at different case studies (circular trajectory, elliptical trajectory, sinusoidal trajectory, infinity trajectory, and line trajectory), these results show good matching between desired trajectory and simulation, while the errors converge to zero rapidly. It shows good performance in minimizing the overshoot and reducing energy and the transient response time.