bluuebunny/crossref_metadata_2025 huggingface dataset:
Signatures of chiral symmetry restoration and its survival throughout the hadronic phase interactions
Authors: Bratkovskaya E.L. , Moreau P. , Palmese A. , Cassing W. , Seifert E. , Steinert T.
Published: February 2018

The effect of the chiral symmetry restoration (CSR) on observables from heavy-ion collisions is studied in the energy range [see formula in PDF]=3–20 GeV within the Parton-Hadron-String Dynamics (PHSD) transport approach. The PHSD includes the deconfinement phase transition as well as essential aspects of CSR in the dense and hot hadronic medium, which are incorporated in the Schwinger mechanism for the hadronic particle production. We adopt different parametrizations of the nuclear equation of state from the non-linear σ - ω model, which enter in the computation of the quark scalar density for the CSR mechanism, in order to estimate the uncertainty in our calculations. For the pion-nucleon ∑-term we adopt ∑π ≈ 45 MeV which corresponds to a ’world average’. Our systematic studies show that chiral symmetry restoration plays a crucial role in the description of heavy-ion collisions at [see formula in PDF]=3–20 GeV, realizing an increase of the hadronic particle production in the strangeness sector with respect to the non-strange one. We identify particle abundances and rapidity spectra to be suitable probes in order to extract information about CSR, while transverse mass spectra are less sensitive ones. Our results provide a microscopic explanation for the "horn" structure in the excitation function of the K+/π+ ratio: the CSR in the hadronic phase produces the steep increase of this particle ratio up to [see formula in PDF] ≈ 7 GeV, while the drop at higher energies is associated to the appearance of a deconfined partonic medium.
Hidden heavy flavour production in heavy-ion collisions
Authors: Castellanos Javier Castillo
Published: February 2018

An overview of recent experimental results on quarkonium production in heavy-ion collisions at RHIC and LHC energies is presented. Their implications in the theoretical understanding of the production of quarkonia is discussed.
Overlap between Lattice QCD and HRG with in-medium effects and parity doubling
Authors: Morita Kenji , Sasaki Chihiro , Lo Pok Man , Redlich Krzysztof
Published: February 2018

We investigate the fluctuations and correlations involving baryon number in hot hadronic matter with modified masses of negative-parity baryons, in the context of the hadron resonance gas. Temperature-dependent masses are adopted from the recent lattice QCD results and from a chiral effective model which implements the parity doubling structure with respect to the chiral symmetry. Confronting the baryon number susceptibility, baryon-charge correlation, and baryon-strangeness correlation and their ratios with the lattice QCD data, we show that the strong downward mass shift in hyperons can accidentally reproduce some correlation ratios, however it also tends to overshoot the individual fluctuations and correlations. This indicates, that in order to correctly account for the influence of the chiral symmetry restoration on the fluctuation observables, a consistent framework of in-medium effects beyond hadron mass shifts is required.
Vorticity and Λ polarization in baryon rich matter
Authors: Baznat Mircea , Gudima Konstantin , Prokhorov George , Sorin Alexander , Teryaev Oleg , Zakharov Valentin
Published: February 2018

The polarization of Λ hyperons due to axial chiral vortical effect is discussed. The effect is proportional to (strange) chemical potential and is pronounced at lower energies in baryon-rich matter. The polarization of ¯ has the same sihn and larger magnitude. The emergence of vortical structures is observed in kinetic QGSM models. The hydrodynamical helicity separation receives the contribution of longitudinal velocity and vorticity implying the quadrupole structure of the latter. The transition from the quark vortical effects to baryons in confined phase may be achieved by exploring the axial charge. At the hadronic level the polarization corresponds to the cores of quantized vortices in pionic superfluid. The chiral vortical effects may be also studied in the frmework of Wigner function establishing the relation to the thermodynamical approach to polarization.
Strongly interacting matter under rotation
Authors: Jiang Yin , Lin Zi-Wei , Huang Xu-Guang , Liao Jinfeng
Published: February 2018

The vorticity-driven effects are systematically studied in various aspects. With AMPT the distributions of vorticity has been investigated in heavy ion collisions with different collision parameters. Taking the rotational polarization effect into account a generic condensate suppression mechanism is discussed and quantitatively studied with NJL model. And in chiral restored phase the chiral vortical effects would generate a new collective mode, i.e. the chiral vortical wave. Using the rotating quark-gluon plasma in heavy ion collisions as a concrete example, we show the formation of induced flavor quadrupole in QGP and estimate the elliptic flow splitting effect for Λ baryons.
Strange matter in compact stars
Authors: Klähn Thomas , Blaschke David B.
Published: February 2018

We discuss possible scenarios for the existence of strange matter in compact stars. The appearance of hyperons leads to a hyperon puzzle in ab-initio approaches based on effective baryon-baryon potentials but is not a severe problem in relativistic mean field models. In general, the puzzle can be resolved in a natural way if hadronic matter gets stiffened at supersaturation densities, an effect based on the quark Pauli quenching between hadrons. We explain the conflict between the necessity to implement dynamical chiral symmetry breaking into a model description and the conditions for the appearance of absolutely stable strange quark matter that require both, approximately masslessness of quarks and a mechanism of confinement. The role of strangeness in compact stars (hadronic or quark matter realizations) remains unsettled. It is not excluded that strangeness plays no role in compact stars at all. To answer the question whether the case of absolutely stable strange quark matter can be excluded on theoretical grounds requires an understanding of dense matter that we have not yet reached.
Resonance production in high energy collisions from small to big systems
Authors: Werner K. , Knospe A. G. , Markert C. , Guiot B. , Karpenko Iu. , Pierog T. , Sophys G. , Stefaniak M. , Bleicher M. , Steinheimer J.
Published: February 2018

The aim of this paper is to understand resonance production (and more generally particle production) for different collision systems, namely proton-proton (pp), proton-nucleus (pA), and nucleus-nucleus (AA) scattering at the LHC. We will investigate in particular particle yields and ratios versus multiplicity, using the same multiplicity definition for the three different systems, in order to analyse in a compact way the evolution of particle production with the system size and the origin of a very different system size dependence of the different particles.
Physics perspectives with AFTER@LHC (A Fixed Target ExpeRiment at LHC)
Authors: Massacrier L. , Anselmino M. , Arnaldi R. , Brodsky S.J. , Chambert V. , Da Silva C. , Didelez J.P. , Echevarria M.G. , Ferreiro E.G. , Fleuret F. , Gao Y. , Genolini B. , Hadjidakis C. , Hřivnáčová I. , Kikola D. , Klein A. , Kurepin A. , Kusina A. , Lansberg J.P. , Lorcé C. , Lyonnet F. , Martinez G. , Nass A. , Pisano C. , Robbe P. , Schienbein I. , Schlegel M. , Scomparin E. , Seixas J. , Shao H.S. , Signori A. , Steffens E. , Szymanowski L. , Topilskaya N. , Trzeciak B. , Uggerhøj U.I. , Uras A. , Ulrich R. , Wagner J. , Yamanaka N. , Yang Z.
Published: February 2018

AFTER@LHC is an ambitious fixed-target project in order to address open questions in the domain of proton and neutron spins, Quark Gluon Plasma and high-x physics, at the highest energy ever reached in the fixed-target mode. Indeed, thanks to the highly energetic 7 TeV proton and 2.76 A.TeV lead LHC beams, center-of-mass energies as large as [see formula in PDF] = 115 GeV in pp/pA and [see formula in PDF] = 72 GeV in AA can be reached, corresponding to an uncharted energy domain between SPS and RHIC. We report two main ways of performing fixed-target collisions at the LHC, both allowing for the usage of one of the existing LHC experiments. In these proceedings, after discussing the projected luminosities considered for one year of data taking at the LHC, we will present a selection of projections for light and heavy-flavour production.
Small systems at the LHC
Authors: Preghenella Roberto
Published: February 2018

In these proceedings, I report on a selection of recent LHC results in small systems from ALICE [1], ATLAS [2] and CMS [3] experiments. Due to the fact that the investigation of QCD in small systems at high multiplicity is becoming an increasingly large subject, interesting the heavy-ion community and more in general the high-energy physics community, not all the related topics can be discussed in this paper. The focus will be given to some of the measurements addressing the physics of collective phenomena in small systems and to the recent results on strangeness enhancement in proton-proton collisions. The reader must be informed that a large number of interesting results did not find space in the discussion reported here.
Processes of hypernuclei formation in relativistic ion collisions
Authors: Botvina Alexander , Bleicher Marcus
Published: February 2018

The study of hypernuclei in relativistic ion collisions open new opportunities for nuclear and particle physics. The main processes leading to the production of hypernuclei in these reactions are the disintegration of large excited hyper-residues (target- and projectile-like), and the coalescence of hyperons with other baryons into light clusters. We use the transport, coalescence and statistical models to describe the whole reaction, and demonstrate the effectiveness of this approach: These reactions lead to the abundant production of multi-strange nuclei and new hypernuclear states. A broad distribution of predicted hypernuclei in masses and isospin allows for investigating properties of exotic hypernuclei, as well as the hypermatter both at high and low temperatures. There is a saturation of the hypernuclei production at high energies, therefore, the optimal way to pursue this experimental research is to use the accelerator facilities of intermediate energies, like FAIR (Darmstadt) and NICA (Dubna).
Azimuthal anisotropy of strange hadrons in U+U collisions at √SNN = 193 GeV at RHIC
Authors: Bairathi Vipul
Published: February 2018

We present the measurement of the azimuthal anisotropy of strange hadrons (K0s, ϕ and Λ) at mid-rapidity (|y| < 1.0) in U+U collisions at [see formula in PDF] = 193 GeV using the STAR detector at RHIC. We present the centrality and transverse momentum dependence of flow coefficients υn for n = 2, 3, 4. A strong centrality dependence of υ2 is observed for the particles K0s, ϕ and Λ in U+U collisions at [see formula in PDF] = 193 GeV similar to Au+Au collisions at [see formula in PDF] = 200 GeV. We studied the number of constituent quark scaling (NCQ) of the flow coefficients. The NCQ scaling of the flow coefficients holds within uncertainties for the particles studied in the U+U collisions. We also present the comparison of the results to the AMPT transport model.
ϕ Meson Measurements at RHIC with the PHENIX Detector
Authors: Sarsour Murad
Published: February 2018

The measurement of ϕ mesons provides key information on the phase of the hot and dense medium created in the relativistic heavy ion collisions. It has a relatively small hadronic interaction cross section and is sensitive to the increase of strangeness (strangeness enhancement), a phenomenon associated with soft particles in bulk matter. Measurements in the dilepton channels are especially interesting since leptons interact only electromagnetically, thus carrying the information from their production phase directly to the detector. Measurements in different nucleus-nucleus collisions allow us to perform a systematic study of the nuclear medium effects on ϕ meson production. The PHENIX detector provides the capabilities to measure the ϕ meson production in a wide range of transverse momentum and rapidity to study these effects.

In this proceeding, we present measurements of the ϕ mesons in a variety of collision systems at [see formula in PDF] = 200 GeV. In case of small systems, the data are compared with AMPT calculations to study the various cold nuclear medium effects involved in ϕ meson production.
Fluctuating fluid dynamics for the QGP in the LHC and BES era
Authors: Bluhm Marcus , Nahrgang Marlene , Schäfer Thomas , Bass Steffen A.
Published: February 2018

In an era of high-precision determinations of QGP properties a full incorporation of fluid dynamical fluctuations into our models has become crucial, in particular, when describing the dynamics of small systems or near the conjectured QCD critical point. In this talk we discuss some effects of the propagation of these fluctuations. For LHC physics we focus on fluctuations in the energy-momentum tensor, while the impact of fluctuations in the diffusive net-baryon density is studied to improve our knowledge on the formation of critical fluctuations being searched in current and future BES programs.
Measurements of spin alignment of vector mesons and global polarization of hyperons with ALICE at the LHC
Authors: Mohanty Bedangadas
Published: February 2018

We present the measurements related to global polarization of Λ hyperons and spin alignment of K*0 vector mesons at mid-rapidity for Pb-Pb collisions at [see formula in PDF] = 2.76 TeV using the ALICE detector at the LHC. The global polarization measurements are carried out with respect to the first order event plane while the spin alignment measurements are carried out with respect to the production plane. No global polarization signal for Λ is observed for 5-15% and 15-50% central Pb-Pb collisions. The spin density matrix element ρ00 is found to have values slightly below ⅓ at low transverse momentum (pT) for K*0 mesons, while it is consistent with ⅓ (no spin alignment) at higher pT. No spin alignment is observed for K*0 in pp collisions at √s = 13 TeV and for the spin zero hadron K0S in 20-40% Pb-Pb collisions at [see formula in PDF] = 2.76 TeV.
Study of Lambda polarization at RHIC BES and LHC energies
Authors: Karpenko Iurii , Becattini Francesco
Published: February 2018

In hydrodynamic approach to relativistic heavy ion collisions, hadrons with nonzero spin, produced out of the hydrodynamic medium, can acquire polarization via spin-vorticity thermodynamic coupling mechanism. The hydrodynamical quantity steering the polarization is the thermal vorticity, that is minus the antisymmetric part of the
gradient of four-temperature field. Based on this mechanism there have been several calculations in hydrodynamic and non-hydrodynamic models for non-central heavy ion collisions in the RHIC Beam Energy Scan energy range, showing that the amount of polarization of produced Λ hyperons ranges from few percents to few permille, and decreases with collision energy. We report on an extension of our existing calculation of global Λ polarization in UrQMD+vHLLE model to full RHIC and LHC energies, and discuss the component of polarization along the beam direction, which is the dominant one at high energies.
A data-drive analysis for heavy quark diffusion coefficient
Authors: Xu Yingru , Nahrgang Marlene , Cao Shanshan , Bernhard Jonah E. , Bass Steffen A.
Published: February 2018

We apply a Bayesian model-to-data analysis on an improved Langevin framework to estimate the temperature and momentum dependence of the heavy quark diffusion coefficient in the quark-gluon plasma (QGP). The spatial diffusion coefficient is found to have a minimum around 1-3 near Tc in the zero momentum limit, and has a non-trivial momentum dependence. With the estimated diffusion coefficient, our improved Langevin
model is able to simultaneously describe the D-meson RAA and v2 in three different systems at RHIC and the LHC.
Coupled dynamics of heavy and light flavor flow harmonics from EPOSHQ
Authors: Gossiaux P.B. , Aichelin J. , Nahrgang M. , Ozvenchuk V. , Werner K.
Published: February 2018

We pursue the study of event by event correlations between low-mass particles and heavy mesons flow harmonics in ultrarelativistic heavy ion collisions and clarify some ambiguities found in one of our previous work.
Measurement of heavy-flavour production, correlations and jets
with ALICE
Authors: Sakai Shingo
Published: February 2018

In this article, recent ALICE measurements of the RAA and v2 of electrons at mid-rapidity (|y|<0.6) and muons at forward rapidity (2.5<y<4), from semi-leptonic decays of heavy-flavour hadrons in Pb–Pb collisions at [see formula in PDF] = 5.02 TeV are shown. The results of D-tagged jet production cross-section in pp collisions at √s =7 TeV are presented. In addition, the azimuthal correlation of D mesons with charged particles in p–Pb collisions at [see formula in PDF] = 5.02 TeV, and electrons from semi-leptonic decays of heavyflavour hadrons with charged particles in p–Pb and Pb–Pb collisions at [see formula in PDF] = 5.02 TeV are reported.
Charmed meson and baryon measurements in pp and p–Pb collisions with ALICE at the LHC
Authors: Norman Jaime
Published: February 2018

We present here recent open heavy-flavour results from the ALICE experiment, including measurements of D-meson, ⋀c baryon and Ξc0 baryon production in pp collisions at √s = 7 TeV and p–Pb collisions at [see formula in PDF] = 5.02 TeV.
Heavy Quark Dynamics toward thermalization: RAA, υ1, υ2, υ3
Authors: Plumari Salvatore , Das Santosh K. , Scardina Francesco , Minissale Vincenzo , Greco Vincenzo
Published: February 2018

We describe the propagation of Heavy quarks (HQs) in the quark-gluon plasma (QGP) within a relativistic Boltzmann transport (RBT) approach. The interaction between heavy quarks and light quarks is described within quasi-particle approach which is able to catch the main features of non-perturbative interaction as the increasing of the interaction in the region of low temperature near TC. In our calculations the hadronization of charm quarks in D mesons is described by mean of an hybrid model of coalescence plus fragmentation. We show that the coalescence play a key role to get a good description of the experimental data for the nuclear suppression factor RAA and the elliptic flow υ2(pT) at both RHIC and LHC energies. Moreover, we show some recent results on the direct flow υ1 and triangular flow υ3 of D meson.
PHENIX results on open heavy flavor production
Authors: Hachiya Takashi
Published: February 2018

PHENIX measures the open heavy flavor productions in p + p, Cu+Au, and Au+Au collisions at [see formula in PDF] = 200 and 510 GeV using the silicon tracking detectors for mid- and forward rapidities. In Au+Au collisions, the nuclear modification of single electrons from bottom and charm hadron decays are measured for minimum bias and most central collisions. It is found that bottoms are less suppressed than charms in pT=3-5 GeV/c and charms in most central collisions are more suppressed than that in minimum bias collisions. In p + p and Cu+Au collisions, J/ψ from B meson decays are measured at forward and backward rapidities. The nuclear modification of B mesons in Cu+Au collisions is consistent with unity.
Strange matter prospects within the string-flip model
Authors: Bastian Niels-Uwe F. , Blaschke David B. , Cierniak Mateusz , Fischer Tobias , Kaltenborn Mark A. R. , Marczenko Michał , Typel Stefan
Published: February 2018

In this contribution we extend the recently developed two-flavor quark-matter string-flip model by including strange quarks. We discuss implications for compact stars.
Heavy Ion Acceleration at J-PARC
Authors: SATO Susumu
Published: February 2018

J-PARC, the Japan Proton Accelerator Research Complex, is an accelerator, which provides a
high-intensity proton beam. Recently as a very attractive project, the acceleration of heavy ions produced by supplementary ion sources, called J-PARC-HI, is seriously contemplated by domestic as well as international communities. The planned facility would accelerate heavy ions up to U92+ with a beam energy 20 AGeV ([see formula in PDF] of 6.2 AGeV). The highlight of the J-PARC-HI project is its very high beam rate up to ~1011 Hz, which will enable the study of very rare events. Taking advantage of this high intensity, J-PARC-HI will carry out frontier studies of new and rare observables in this energy region: (i) nuclear medium modification of chiral property of vector mesons through low-mass di-lepton signal, (ii) QCD critical pointcharacterization through event-by-event fluctuation signals of particle production, (iii) systematic measurements related to the equation of state through collective flow signal or two-particle momentum correlation signal, or (iv) the search of hyper nuclei with multi strangeness including or exceeding S = 3. The current plan of J-PARC-HI aims to carrying out the first experimental measurements in 2025.
A Digital Image Denoising Algorithm Based on Gaussian Filtering and Bilateral Filtering
Authors: Piao Weiying , Yuan Yibao , Lin Haijun
Published: February 2018

Bilateral filtering has been applied in the area of digital image processing widely, but in the high gradient region of the image, bilateral filtering may generate staircase effect. Bilateral filtering can be regarded as one particular form of local mode filtering, according to above analysis, an mixed image de-noising algorithm is proposed based on Gaussian filter and bilateral filtering. First of all, it uses Gaussian filter to filtrate the noise image and get the reference image, then to take both the reference image and noise image as the input for range kernel function of bilateral filter. The reference image can provide the image’s low frequency information, and noise image can provide image’s high frequency information. Through the competitive experiment on both the method in this paper and traditional bilateral filtering, the experimental result showed that the mixed de-noising algorithm can effectively overcome staircase effect, and the filtrated image was more smooth, its textural features was also more close to the original image, and it can achieve higher PSNR value, but the amount of calculation of above two algorithms are basically the same.
A Joint Subcarrier Assignment and Power Allocation with Statistical Delay QoS Provisioning in Full-Duplex OFDMA Systems
Authors: Yan Shuai , Chi Xuefen , Zhao Linlin , Zhu Yuhong
Published: February 2018

In this paper, we explore a joint subcarrier assignment and power allocation with statistical delay QoS guarantees for full-duplex OFDMA systems. Effective capacity theory which evaluates wireless channel capacity from a novel view of link layer provides a theory basis for modeling the system capacity under the conditions of delay QoS constrains. After modeling the aggregate effective capacity of the system, we formulate joint subcarrier assignment and power allocation problem as a mixed integer programming problem, whose target is to maximize the aggregate effective capacity. To solve this integer programming problem, we allocate initial power on each subcarrier and decompose it into two subproblems, which are subcarrier allocation problem and power allocation problem respectively. Further, we propose an alternative algorithm to achieve joint subcarrier assignment and power allocation, which can meet the “subcarrier continuity” constraint of uplink resource allocation. Simulations have shown that the performance of our proposed scheme is favorite. Additionally, we investigate the effect of the residual selfinterference, inter-node interference (INI) and statistical delay QoS exponent on the performance of systems.
Key Technologies in Massive MIMO
Authors: Hu Qiang , Zhang Meixiang , Gao Renzheng
Published: February 2018

The explosive growth of wireless data traffic in the future fifth generation mobile communication system (5G) has led researchers to develop new disruptive technologies. As an extension of traditional MIMO technology, massive MIMO can greatly improve the throughput rate and energy efficiency, and can effectively improve the link reliability and data transmission rate, which is an important research direction of 5G wireless communication. Massive MIMO technology is nearly three years to get a new technology of rapid development and it through a lot of increasing the number of antenna communication, using very duplex communication mode, make the system spectrum efficiency to an unprecedented height.
Reliability Assessment of the Wind-solar-battery Storage System Based on Optimized Configuration
Authors: Wang Yuan , Liu Haojie
Published: February 2018

In order to analyze the impact of new energy power generation on the power grid system, the reliability evaluation of the wind-solarbattery storage system is carried out. Proposed to wind power, solar, thermal power, different sodium-sulfur battery storage combined optimal dispatch of scenery. The shortest variance of the net load and the maximum variance of the wind storage system are taken as the objective function. The short-term optimal scheduling model of the power grid is established based on the characteristics of the wind farm, the characteristics of the solar field and the electric field of the sodium flow battery. Multi-objective particle swarm optimization The algorithm solves the model and obtains the output power of wind, light, storage and fire under different new energy strategies. The reliability is evaluated by Monte-Carlo method. Taking the IEEE-30 node as an example, it is proved that the proposed model is reasonable and the new energy can improve the clean energy consumption ability and minimize the impact on the power grid under the optimal scheduling strategy.
Mobile Application Identification based on Hidden Markov Model
Authors: Yang Xinyan , Yi Yunhui , Xiao Xinguang , Meng Yanhong
Published: February 2018

With the increasing number of mobile applications, there has more challenging network management tasks to resolve. Users also face security issues of the mobile Internet application when enjoying the mobile network resources. Identifying applications that correspond to network traffic can help network operators effectively perform network management. The existing mobile application recognition technology presents new challenges in extensibility and applications with encryption protocols. For the existing mobile application recognition technology, there are two problems, they can not recognize the application which using the encryption protocol and their scalability is poor. In this paper, a mobile application identification method based on Hidden Markov Model(HMM) is proposed to extract the defined statistical characteristics from different network flows generated when each application starting. According to the time information of different network flows to get the corresponding time series, and then for each application to be identified separately to establish the corresponding HMM model. Then, we use 10 common applications to test the method proposed in this paper. The test results show that the mobile application recognition method proposed in this paper has a high accuracy and good generalization ability.
Suspended Microracetrack Resonator with Lateral Sub-wavelength-Grating Metamaterial Cladding for Mid-infrared Sensing Applications
Authors: Zhang Zecen , Ng Geok Ing , Hu Ting , Qiu Haodong , Guo Xin , Wang Wanjun , Rouifed Mohamed S. , Liu Chongyang , Sia Jiaxu , Zhou Jin , Wang Hong
Published: February 2018

A one-time etching suspended microracetrack resonator with lateral sub-wavelength-grating (SWG) metamaterial cladding is theoretically and experimentally demonstrated on commercial 340 nm-thick-top-silicon silicon-on-insulator (SOI) platform for mid-infrared (MIR) bio-chemical sensing applications. The suspended structure can offer a larger exposed area of waveguides with the testing chemicals as well as a decent sensitivity. And the one-time etching process also eases the fabrication. The suspended waveguide is optimized with a balance between propagation loss and the sensitivity. The suspended microracetrack resonator is experimentally measured at 2 μm wavelength and well fitted with an extinction ratio (ER) of 12.3 dB and a full-width-at-half-maximum (FWHM) of 0.12 nm, which corresponds to a quality factor (Q factor) of 16600. With the equivalent refractive index method and a specially developed numerical model, the expected sensitivities of fundamental TE and TM mode were calculated as 58 nm/RIU and 303 nm/RIU respectively. This one-time etching suspended microracetrack resonator shows great potential in MIR optical bio-chemical sensing applications.
A New Data Fusion Method for Multi Terminal Fault Location Based on Sensor Networks
Authors: Cai Qing-Sen
Published: February 2018

Data fusion with different types of data that used for grid fault location can bring more accurate and clear results. Therefore, a new method for fault location which contains multi grid current and voltage, time and coordinate data information is proposed. Transient traveling wave is analyzed for determine the required data information in the first place, and then affirm the positioning principle and the selection rules of positioning network according to characteristics of multi fault traveling wave. Finally, Grid fault location will be precisely positioned by applying multiple data grid fault location algorithm. Simulation results shows that the proposed method is feasible, and the new algorithm has higher positioning accuracy.
The solution of excess ingredients in hotels deduced by extensible mind mapping
Authors: Ma Fuyu , Fan Rui , Huang Chongwen , Guo Bifeng , Li Zihao , Liu Qiubin , Liu Penghui , He Weitao
Published: February 2018

Aiming at the contradictory problem that the hotels’ daily excess ingredient causes a lot of losses, which is contradictory to the profit purpose of ingredient, this paper establishes kernel model and Extensible model through Extensible theory methods combined with mind mapping. Through evaluating the characteristics of alike relative matter-element, making up comprehensive dependent functions and using Extensible transformation, we can get various solutions. And then, taking the matter-element characteristics as evaluation criteria, we can carry out the superiority evaluation to the solutions and finally get the superior solution.
Lecture notes in computer science: research on hybrid grid algorithm of voronoi diagram
Authors: Wang Binjun , Wang Qiushi , Li Jingying
Published: February 2018

Characteristics and performance of two grid methods, which include the growth method and the point by point scanning method of Voronoi diagram, are analyzed qualitatively and quantitatively. The theoretical analysis and experimental results show that the growth method is faster, but the boundary of Voronoi diagram generated by the point by point scanning method is more accurate. By combining the advantages of these two grid methods, the hybrid grid algorithm is proposed: the growth method is used firstly to extend a large step, and then the point by point scanning method is used to color the remaining blank pixel. The theoretical analysis and experimental results show that the speed of the hybrid grid algorithm is close to the fastest growth algorithm, and the accuracy is as well as the point by point scanning algorithm.
Impact of nitrate ammonium and calcium (CAN27%) on the environment.
Authors: Redouane Fares , Abed Bouadi , Mourad Lounis
Published: February 2018

In this research, a detailed study for energy consumption levels evaluation and environmental impacts assessment in the fertilizers production sector in Algeria was achieved. An analysis of the various inputs and outputs to the process to identify different sources of pollution throughout the life cycle of fertilizer was used. One product is making the subject in this study; CAN 27% N. The flows of material and energy for each phase of the life cycle were counted and the associated environmental problems were identified. The analysis was conducted according to the LCA standards ISO (International Standard Organization) 14040 series and the impacts categories studied are Global Warming Potential, Acidification Potential, Troposphere Ozone Precursor Potential, and Resources use. The results show that Cumulative Energies Requirement and GHG emission in Algerian fertilizers production process are significant. Ammonia plant use 82% of total natural gas that is consumed by fertilizer manufactory. Production of ammonia per year requires 4,506.107MJ of electricity and 2,059.108of natural gas and generates 1.82 T CO2 eq. (equivalent).
Research on structural dynamic characteristics of continuous steel box girder-bridge with lager ratio of wide-span
Authors: Yin Haijun , Li Ziqing , Hao Xianwu
Published: February 2018

Structure natural frequency and mode of vibration can not only reflect the structure modal parameters of dynamic properties, but also incarnate the dynamic evaluation characteristics of bridge structure. This paper applies ANSYS to establish the finite element model based on a continuous steel box girder bridge in order to obtain the corresponding modal analysis parameters. Through the environmental stimulation test, The results show that height of the steel box girder and the setting of diaphragm plate is reasonable, transverse space of piers not merely provide enough support but also ensure lateral stability of the bridge, as well as offering aside the maximum lateral clearance of the existing road. Meanwhile, the calculation results have important engineering practical values. which can provide basic data for the design, construction and maintenance of similar Bridges.
Development of cost management and aided decision system for casting enterprises based on ERP
Authors: Zhang Hailin
Published: February 2018

The present situation of production management and the application status of ERP in small and medium sized foundry enterpriseswere analyzed in this paper and a set of cost management and aided decision system based on ERP for foundry enterprises was developed. Application of the system can help managers regulate the production process, reduce production costs and improve economic efficiency.
Codebook metrics evaluation for millimeter wave communications by antenna array response and signal to noise ratio
Authors: Abdo Adam Mohamed Ahmed , Zhao Xiongwen , Zhang Rui , Zhang Yu
Published: February 2018

Codebook design is a key point in beam-forming which is necessary for millimeter Wave (mmWave) communications to compensate its huge path loss. In our study, we demonstrate the benefits of the number of antenna elements for beamforming; we focus on the number of required beams to cover the whole circle with considering the available number of antenna elements. In addition to, we propose a new codebook structure based on unique phase states. Based on the Array Factor (AF) and Signalto-Noise Ratio (SNR), the proposed codebook is compared and evaluated with the uniform weighting codebook, circular array codebook, and IEEE802.15.3c standard codebook. The results show that the proposed codebook achieves SNR values and side-lobes cancel a bit better than IEEE802.15.3c, but higher peak and wider dynamic range of SNR and better array directivity compared with the uniform weighting and circular antenna codebooks. Thus, the proposed codebook is expected to improve signal quality and increases user throughput significantly.
Energy consumption index minimized resource allocation in hybrid energy multiuser OFDM system with distributed antennas
Authors: MAO Huanhuan , Zhu Pengcheng , Li Jiamin
Published: February 2018

Energy harvesting is one of the promising option for realization of green communication and has been a growing concern recently. In this paper, we address the downlink resource allocation in OFDM system with distributed antennas with hybrid power supply base station, where energy harvesting and non-renewable power sources are used complementarily. A joint subcarrier and power allocation problem is formulated for minimizing the net Energy Consumption Index (ECI) with system Quality of Service (QoS) and bit error rates constraint. The problem is a 0-1 mixed integer nonlinear programming problem due to the binary subcarrier allocation variable. To solve the problem, we design an algorithm based on Lagrange relaxation method and fraction programming which optimizes the power
allocation and subcarrier allocation iteratively in two nests. Simulation results show that the proposed algorithm converges in a small number of iterations and can improve net ECI of system greatly.
Research on the development of scientific and technological intelligence in big data environment
Authors: Wu Qiong , Wu Chensheng , Liu Yanjun
Published: February 2018

This paper describes the features of Internet data from the perspective of the development of scientific and technological intelligence in the era of big data. It has discussed the main problems that affect the construction of scientific and technological intelligence system and the specific technical problems in the process of construction. What's more, it has clarified that in the big data environment, the basic features of the
development of scientific and technological intelligence and problems faced by the big data intelligence system. Finally, the author has predicted the opportunities and challenges for scientific and technological intelligence service agency posed by the big data.
An overview of current situations of robot industry development
Authors: Wu Qiong , Liu Yanjun , Wu Chensheng
Published: February 2018

As an industry of emerging technology, robot industry has become one of important signs to evaluate a country’s level in science and technology innovation and high-end manufacturing, and an important strategic field to take the preemptive opportunities in development of intelligent society. Developed countries such as the USA, Germany, France and Japan have formulated their robot R&D strategies and planning in succession. China boasts good industrial foundation and has made encouraging progress in the course of development of robot technology. This paper briefly discusses the application type of robot industry and current situations of robot industry development in countries around the world, and makes detailed explanation of current situations of robot industry development in China.
The design of clothing washable labels based on NFC
Authors: Liu Zhengdong , Ma Tianyu
Published: February 2018

In this paper, With the rapid development of NFC (Near Field Communication) technology and the digital advancement of clothing industry, a kind of clothing washable labels based on NFC is proposed and designed in this paper. It can be used to compose a clothing information system together with NFC mobile phones, mobile Internet, enterprise information centers, etc. By experiment, consumers can read and write NFC washable labels through their mobile phones, which can be quicker and more convenient to obtain clothing washing and maintenance information. Moreover, the NFC washable labels conform to the washing requirements of washable labels. The emergence of the NFC washable labels provides a physical basis for smart matching recommendations and precise directional push of clothing advertising information for consumers.
Mathematical model for crane scheduling in mixed yard
Authors: Han Huihui , Mi Liying , Yang Tao , Luo Xin
Published: February 2018

In mixed yards, the stacking status of the container is not in the order of the shipment, causing the efficiency of the process of loading and unloading decreased. Therefore, it is very important to come up with a method using the existing facilities to improve the efficiency and reduce the cost. In this paper(Produces the permission block, and copyright information Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the owner/author(s).) We propose a method that sets a buffer in the yard to minimize the duration of the shifting process. To implement this method, the integer programming model is founded and the small scale accurate solution is used to implement the crane scheduling in the shifting process. The results showed that the model mentioned earlier can solve the problem of crane scheduling in the process of shifting with efficiency and provide strategic support for the management of yard.
Motorised momentum exchange space tethers: the dynamics of asymmetrical tethers, and some recent new applications
Authors: Cartmell Matthew , Ganilova Olga , Lennon Eoin , Shuttleworth Gavin
Published: February 2018

This paper reports on a first attempt to model the dynamics of an asymmetrical motorised momentum exchange tether for spacecraft payload propulsion, and it also provides some interesting summary results for two novel applications for motorised momentum exchange tethers. The asymmetrical tether analysis is very important because it represents the problematic scenario when payload mass unbalance intrudes, due to unexpected payload loss or failure to retrieve. Mass symmetry is highly desirable both dynamically and logistically, but it is shown in this paper that there is still realistic potential for mission rescue should an asymmetry condition arise. Conceptual designs for tethered payload release from LEO and lunar tether delivery and retrieval are also presented as options for future development.
Energy balance analysis in non linear dynamic equivalent systems.
Authors: Carlos Iturregui Arranz , Jose Manuel Soria Herrera , Ivan Muñoz Díaz , Jaime Higinio García Palacios
Published: February 2018

The aim of the paper is to present a critical analysis for nonlinear dynamic vibrations. It is applicable to single degree of freedom –SDOF- of reinforced concrete –RC- structures, revealing its multi degree of freedom –MDOF- performance, showing contrast using the balance of energy, using six accelerograms based on type I and II spectrum, according with Eurocode-8. The degradation curve was obtained applying a new formulation, based on the system work and complementary work, into the pushover analysis. A new method incorporating the Bouc-Wen-Baben-Noori theory and global damage was used for the analysis, adding relevance to the: energy balance in its dissipative part, analysis of the structure’s fundamental parameters, relation’s effective period, equivalent damping and global ductility.

The powers, energies and works developed are analyzed, creating a precise balance since energy enters selectively. Hence, an equivalent damping containing a viscous and hysteretic part is predictable, accordingly to the variation of the building’s nonlinear properties. Evaluation of the adequateness and safety level are also obtainable. The controlled parameters contrasted with the balance predicts the structure’s MDOF situation, at any moment related with seismic events. This methodology can be used to stablish a systematic control of nonlinearities for other structural schemes.
Motorcycle control-oriented dynamics modeling for accelerated maneuvers on slippy terrains
Authors: Jarzębowska Elżbieta , Cieśluk Michał
Published: February 2018

The paper presents a motorcycle dynamics model developed for testing and future model based controller designs for accelerated maneuvers on variable slip terrains. The dynamics is simplified, yet it captures real motorcycle behaviors when it accelerates and decelerates on a curvy trajectory and contact forces due to variable ground properties change and allow to generate slip. The tire - terrain model is based upon a simplified Pacejka model. The paper objective is not to obtain complex dynamical systems of equations like those required for high-fidelity simulations. Instead, the aim is to derive simple but reliable and manageable models that enable designing and implementing, and verifying control laws, as well as maintaining their capability to capture the main behaviors of real systems. The paper applies the adopted assumptions to develop the motorcycle model, and presents simulation tests for the motorcycle acceleration and deceleration during turn maneuvers, and during changes of the ground the vehicle moves on.
Analytical approximation of rail bending stress
Authors: Koziol Piotr
Published: February 2018

Phenomena associated with railway dynamics are usually analysed by using numerical approaches due to high computational complexity of such systems. However, classical methods based on analytical modelling are still highly valued and desirable by researchers and railway industry. This paper presents analytical solution representing dynamic response of railway track due to moving train in the case of nonlinear foundation. In published papers, one can find analyses of various characteristics such as velocity and acceleration of vibrations of track layers or bending moments of rails. The approach applied in this paper uses the Fourier transform combined with wavelet based approximation applied to the systems of infinitely long beams. The system of Euler-Bernoulli beams resting on viscoelastic foundation represents two-layer model (or one-layer model) of railway track, commonly used in engineering studies. It is shown that although both methods give good results for displacements, analysis of other characteristics, involving derivatives of higher orders, might lead to wrong results, even in the linear case. Possible reasons of this problem are pointed out. Some modifications of the known dynamic railway track models are proposed for further work.
Vibration analysis of an axially moving multiscale composite plate subjected to thermal loading
Authors: Marynowski Krzysztof
Published: February 2018

This study investigated the effects of temperature on free vibrations and critical transport speeds of an axially moving multiscale composite plate. On the basis of the frequency-temperature equivalence principle, a linear mathematical model of the moving multiscale composite plate is derived in the complex frequency domain. Fractional standard rheological model of the plate material as the function of reduced frequency depended on the temperature is determined. In numerical investigations carbon nanotubes- and graphene-reinforced copper plate was taken into account.. To describe thermomechanical properties of the plate material, the investigation results obtained from the molecular dynamics studies and the experimental characteristic of beryllium copper in low temperatures presented in literature is taken into account.. The effects of temperature, transport speed, and internal damping on natural frequencies and critical transport speed are analyzed. The critical transport speeds of the graphene-reinforced multiscale composite are higher than both carbon nanotubes-reinforced composite as well as the comparable copper alloy.
Experimental and numerical investigation of eigenfrequencies of rectangular plates, interacting with a fluid
Authors: Bochkarev Sergey , Kamenskikh Alexander , Lekomtsev Sergey
Published: February 2018

The method of laser vibrometry was applied to investigate the vibrations of elastic plates interacting with a liquid for different variants of plate clamping. The obtained results are used to verify the developed finite-element algorithm designed to solve the problem of spatial vibrations of one or two parallel rectangular plates interacting with a quiescent viscous fluid. The results of calculations of the natural frequencies and damping decrement obtained under different boundary conditions and the height of the fluid layer are discussed. It has been demonstrated that for the configurations considered, viscosity of the liquid has a significant effect on the damping decrement, in contrast to frequencies of vibrations.