bluuebunny/crossref_metadata_2025 huggingface dataset:
Advanced algorithmic model for poly-optimization of biomass fuel production from separate combustible fractions of municipal wastes as a progress in improving energy efficiency of waste utilization
Authors: Gaska Krzysztof , Generowicz Agnieszka , Lobur Mykhailo , Jaworski Nazariy , Ciuła Józef , Vovk Myroslava
Published: October 2019

Usage of generated fuel components from segregated municipal waste groups in combined combustion processes with traditional fuels results in significant savings by partial replacement of fossil fuels and the reduction of environmental inconvenience that arises directly from the migration of waste to the environment. This article develops technological process of fuel components production which is controlled by advanced embedded SCADA control systems, providing monitoring of process parameters, process visualization and implementation, with the help of logic controllers of freely programmable PLC and complex control algorithms (including adaptive, predictive and inferential control algorithms) by implementation of the polymorphic model of fuel components obtaining process multi-stream optimization.
Enjeux et défis de l’évaluation longitudinale : quelques pistes de réflexion préalables à son implantation
Authors: St-Onge Christina
Published: October 2019

Contexte et problématique :La formation de futurs professionnels de la santé compétents est une préoccupation importante pour tous les membres de la communauté en pédagogie des sciences de la santé. À cet effet, on accorde beaucoup d’importance à l’évaluation comme agent régulateur de l’accès aux professions. En lien avec la perspective de l’approche par compétences, l’idée de structurer l’évaluation de façon longitudinale, autour des trajectoires de développement professionnelles, apparaît d’une grande pertinence.Exégèse :L’évaluation longitudinale fait référence à toutes les évaluations mises en place pour documenter le rendement et le progrès des apprenants selon une trajectoire de développement préétablie. Les éducateurs et chercheurs qui prônent l’implantation de l’évaluation longitudinale dans des programmes qui préparent à la pratique des professions en santé y voient de multiples avantages, parmi lesquels la facilitation de la rétroaction qui pourrait être plus authentique, une identification précoce des apprenants en difficulté et une augmentation de l’autonomie des apprenants dans leurs développements. Cependant, les preuves qui soutiennent les retombées positives associées à l’évaluation longitudinale sont « faibles » pour ne pas dire manquantes.Conclusion :Il est essentiel, en tant que communauté, de documenter les effets et l’impact de l’évaluation longitudinale de façon plus systématique, structurée et rigoureuse.
Endoskopische Abtragung eines vernarbten Adenoms im Rektum mittels EndoRotor
Authors: Stadler Andrea , Knabe Mate , May Andrea
Published: October 2019

Einleitung Gutartige kolorektale Neoplasien werden gewöhnlich mittels Schlingenresektion oder endoskopischer Submukosadissektion (ESD) reseziert. Diese Techniken sind sicher, aber gerade die Piecemeal-Resektion bei flachen Adenomen mit einer Größe über 20 mm birgt ein relevantes Rezidivrisiko. Die endoskopische Therapie eines Narbenrezidivs kann auch in Expertenhand sehr anspruchsvoll sein. Während kleinere vernarbte Adenomrezidive < 20 mm sich für eine endoskopische Vollwandresektion eignen, waren größere bislang nur mit aufwendigen endoskopischen Methoden anzugehen oder mussten einer chirurgischen Sanierung unterzogen werden.

Methode Der EndoRotor® (Interscope Medical, Vereinigte Staaten) ist ein neues athermisches Resektionssystem zur Abtragung benigner Neoplasien des Gastrointestinaltrakts. Über eine Öffnung an der Spitze eines flexiblen Resektionskatheters wird das Gewebe angesaugt, durch eine rotierende Klinge im Inneren des Katheters abgetragen und schließlich in einer Falle geborgen.

Kasuistik Wir präsentieren den Fall einer 79-jährigen Patientin mit einem großen Adenomrezidiv eines lateral-spreading Tumor granular type im Rektum. Während ein Teil des Adenoms mittels ESD entfernt wurde, waren die vernarbten Adenomanteile mit den herkömmlichen endoskopischen Methoden nicht anzugehen. Durch Anwendung des EndoRotors konnten die Adenomreste, die einer Narbenplatte auflagen, komplikationslos und vollständig abgetragen werden.

Zusammenfassung Vernarbte Adenome stellen eine Herausforderung für die interventionelle Endoskopie dar. In diesem Fallbeispiel hat sich der EndoRotor als neues athermisches Resektionssystem bei komplizierten vernarbten rektalen Adenomen als sichere und praktikable Methode erwiesen.
Adaptive printing using VO2 optical antennas with subwavelength resolution
Authors: Nagasaki Yusuke , Kohno Toshinori , Bando Kazuki , Takase Hiroaki , Fujita Katsumasa , Takahara Junichi
Published: October 2019

Adaptive pixel operating in the infrared region enables the encoding of invisible information and extraction using specific inputs. Recently, the formation of an adoptive image by utilizing VO2 having the property of phase transitions has been demonstrated. However, the improvement of its pixel resolution is challenging, and a simple geometry is needed to ensure accuracy and reproducibility of the optical function of the pixel; therefore, the proposal of a different working principle is required. Here, we demonstrate adaptive printing based on active tuning between Mie and plasmon resonances excited in VO2 nanostructures with subwavelength resolution. The dielectric constant of the fabricated VO2 changes from positive to negative at infrared wavelengths when the material is heated. By nanostructurizing and arranging VO2, Mie and plasmon resonances are excited at low and high temperatures, respectively, and the measured reflection spectra vary depending on the temperature. Using resonators with the tuning characteristics as pixels, we construct an image with high resolution exceeding 39 000 dpi at λ = 1.5 μm and demonstrate the concealment and extraction of encoded information. Our designed tunable pixels can be applied to functional devices, including tunable displays, anticounterfeiting, and clarifications.
Surface-induced thickness limit of conducting La-doped SrTiO3 thin films
Authors: Shin Yeong Jae , Lau Claudia , Lee Sangjae , Walker Frederick J. , Ahn Charles H.
Published: October 2019

We report on a surface-induced, insulating, electrically dead layer in ultrathin conducting La-doped SrTiO3 thin films. Systematic studies on electrical properties as a function of film thickness and La-doping levels reveal that the insulating layer has a constant thickness and traps a constant amount of electron density regardless of La-doping levels. Growing an additional capping layer on top of the La-doped SrTiO3 surface counteracts the reduced conductivity, indicating a strong relationship between the insulating layer and the surface structure. Our results emphasize the importance of surface state studies for functional oxides in the thin film limit and provide a guiding principle for the fabrication of La-doped SrTiO3-based oxide nanoscale devices.
Insulation improvement of an all-solid pulse forming line with film dielectric
Authors: Yu Binxiong , Li Rui , Su Jian-cang , Xu Xiudong , Qiu Xudong , Shang Wei , Liu Jin-liang
Published: October 2019

A pulse forming line (PFL) cascaded in the radial direction by multistage rolled strip line units is put forward. With this method, the dielectric thickness of the rolled strip line unit is decreased. So, the reliability of the PFL under a high voltage will increase. At the same time, the difficulty for rolling the PFL will decrease. The factors affecting the pulse lifetime of the rolled PFL are analyzed by theory and simulation, and two improvement methods are put forward. First, the electric field enhance at the edges of the electrodes of the rolled PFL is so large that corona discharge occurs at these positions. The improvement method is to use the combination dielectric layer combined by corona-resistant polyimide (PI) films and polypropylene (PP) films as the dielectric of the rolled strip line unit. With this method, the normal electric field of the electrode edges is decreased. Besides, the corona resistance of the dielectric layer is much improved because the PI film has a good performance under corona discharge. Second, the positions where the output foils are located are the insulation weakness of the PFL because these positions are discontinuous. The improvement method is to increase the insulation thickness of these positions. A rolled PFL is cascaded by 3 stages of rolled strip lines, which has a charging voltage of 90 kV. According to the lifetime test, the pulse lifetime of the rolled PFL reaches 300 000 pulses, which is 100 times larger than the pulse lifetime of a rolled PFL without the improvement method.
Photonic quantum information processing: A concise review
Authors: Slussarenko Sergei , Pryde Geoff J.
Published: October 2019

Photons have been a flagship system for studying quantum mechanics, advancing quantum information science, and developing quantum technologies. Quantum entanglement, teleportation, quantum key distribution, and early quantum computing demonstrations were pioneered in this technology because photons represent a naturally mobile and low-noise system with quantum-limited detection readily available. The quantum states of individual photons can be manipulated with very high precision using interferometry, an experimental staple that has been under continuous development since the 19th century. The complexity of photonic quantum computing devices and protocol realizations has raced ahead as both underlying technologies and theoretical schemes have continued to develop. Today, photonic quantum computing represents an exciting path to medium- and large-scale processing. It promises to put aside its reputation for requiring excessive resource overheads due to inefficient two-qubit gates. Instead, the ability to generate large numbers of photons—and the development of integrated platforms, improved sources and detectors, novel noise-tolerant theoretical approaches, and more—have solidified it as a leading contender for both quantum information processing and quantum networking. Our concise review provides a flyover of some key aspects of the field, with a focus on experiment. Apart from being a short and accessible introduction, its many references to in-depth articles and longer specialist reviews serve as a launching point for deeper study of the field.
The structure and electronic properties of crimson phosphorus
Authors: Huang Hongyang , Zhang Lihui , Xiao Bing , Cheng Yonghong , Zhang Jinying
Published: October 2019

Semiconducting layered phosphorus allotropes, such as black and violet phosphorus, are attracting more and more attention due to their predicted high hole mobilities (up to 1000 cm2 V−2 s−1). Violet phosphorus is assumed to be the intermediate structure between amorphous red phosphorus and black phosphorus. Is there any other reasonable and stable allotrope between them? An unexplored layered phosphorus allotrope, crimson phosphorus, has been predicted by the ab initio method. The crystal structure, elastic moduli, band structure, and charge carrier mobility of crimson phosphorus have been investigated. A higher symmetry with similar energetic stability and a narrower bandgap compared to those of violet phosphorus has been obtained by crimson phosphorus. The hole mobilities of crimson phosphorus have been calculated to be 5383 (μx) and 1072 (μy) cm2 V−1 s−1, which are much higher than those of violet phosphorus (μx: 91 cm2 V−1 s−1 and μy: 27 cm2 V−1 s−1) and black phosphorus (μx: 3525 cm2 V−1 s−1 and μy: 9 cm2 V−1 s−1). Additionally, much higher hole mobility anisotropy has been demonstrated by crimson phosphorus. Lower electron mobility compared with those of black and violet ones has been obtained by crimson phosphorus. The unique electronic properties of crimson phosphorus provide promising 2D materials for desired devices.
A three-dimensional reduced MHD model consistent with full MHD
Authors: Nikulsin N. , Hoelzl M. , Zocco A. , Lackner K. , Günter S.
Published: October 2019

Within the context of a viscoresistive magnetohydrodynamic (MHD) model with anisotropic heat transport and cross field mass diffusion, we introduce novel three-term representations for the magnetic field (background vacuum field, field line bending, and field compression) and velocity (E→×B→ flow, field-aligned flow, and fluid compression), which are amenable to three-dimensional treatment. Once the representations are inserted into the MHD equations, appropriate projection operators are applied to Faraday's law and the Navier-Stokes equation to obtain a system of scalar equations that is closed by the continuity and energy equations. If the background vacuum field is sufficiently strong and the β is low, MHD waves are approximately separated by the three terms in the velocity representation, with each term containing a specific wave. Thus, by setting the appropriate term to zero, we eliminate fast magnetosonic waves, obtaining a reduced MHD model. We also show that the other two velocity terms do not compress the magnetic field, which allows us to set the field compression term to zero within the same reduced model. Dropping also the field-aligned flow, a further simplified model is obtained, leading to a fully consistent hierarchy of reduced and full MHD models for 3D plasma configurations. Finally, we discuss the conservation properties and derive the conditions under which the reduction approximation is valid. We also show that by using an ordering approach, reduced MHD equations similar to what we got from the ansatz approach can be obtained by means of a physics-based asymptotic expansion.
Electric-field-induced optical hysteresis in single-layer WSe2
Authors: Sun Zheng , Beaumariage Jonathan , Xu Ke , Liang Jierui , Hou Shaocong , Forrest Stephen R. , Fullerton-Shirey Susan K. , Snoke David W.
Published: October 2019

We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO2/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges.
Three-dimensional rotation of paramagnetic and ferromagnetic prolate spheroids in simple shear and uniform magnetic field
Authors: Sobecki Christopher A. , Zhang Yanzhi , Wang Cheng
Published: October 2019

We examine a time-dependent, three-dimensional rotation of magnetic ellipsoidal particles in a two-dimensional, simple shear flow and a uniform magnetic field. We consider that the particles have paramagnetic and ferromagnetic properties, and we compare their rotational dynamics due to the strengths and directions of the applied uniform magnetic field. We determine the critical magnetic field strength that can pin the particles’ rotations. Above the critical field strength, the particles’ stable steady angles were determined. In a weak magnetic regime (below the critical field strength), a paramagnetic particle’s polar angle will oscillate toward the magnetic field plane while its azimuthal angle will execute periodic rotations. A ferromagnetic particle’s rotation depends on its initial angles and the magnetic field strength and direction. Even when it is exposed to a critical magnetic field strength, its rotational dynamics will either be pinned in or out of the magnetic field plane. In a weak magnetic regime, a ferromagnetic particle will either execute out-of-plane rotations or will oscillate toward the magnetic field plane and perform periodic rotations. For both particles, we analytically determine the peaks and troughs of their oscillations and study their time-dependent rotations through analytical and numerical analyses.
Hydrophobin-functionalized film bulk acoustic wave resonators for sensitive and polarity-sensitive sensing of volatile organic compounds
Authors: Tao Jin , Chang Ye , Liang Jingqiu , Duan Xuexin , Pang Wei , Wang Yanyan , Wang Zefang
Published: October 2019

Film bulk acoustic wave resonators have demonstrated great potential in the detection of volatile organic compounds owing to their high sensitivity, miniature size, low power consumption, capacity for integration, and other beneficial characteristics. However, it is necessary to functionalize the surfaces of these resonators to enhance the adsorption and discrimination of volatile organic compounds. Here, we report a convenient and reliable method for functionalizing the surfaces of film bulk acoustic wave resonators with hydrophobins via self-assembly to enable highly sensitive and polarity sensitive detection of volatile organic compounds. Experiments conducted using various concentrations of five volatile organic compounds possessing different polarities demonstrated that the hydrophobin coating enhanced the responsivity of the proposed sensor. The obtained results were in good agreement with the Brunauer–Emmett–Teller model of multilayer physisorption, which suggests that the hydrophobin coating enhanced the sensitivity by improving the monolayer adsorption capacity. Our work demonstrates that the combination of multifunctional biosurfactants and microelectromechanical devices can permit high-performance gas sensing.
Deep neural network method for predicting the mechanical properties of composites
Authors: Ye Sang , Li Bo , Li Qunyang , Zhao Hong-Ping , Feng Xi-Qiao
Published: October 2019

Determining the macroscopic mechanical properties of composites with complex microstructures is a key issue in many of their applications. In this Letter, a machine learning-based approach is proposed to predict the effective elastic properties of composites with arbitrary shapes and distributions of inclusions. Using several data sets generated from the finite element method, a convolutional neural network method is developed to predict the effective Young's modulus and Poisson's ratio of composites directly from a window of their microstructural image. Through numerical experiments, we demonstrate that the trained network can efficiently provide an accurate mapping between the effective mechanical property and the microstructures of composites with complex structures. This study paves a way for characterizing heterogeneous materials in big data-driven material design.
Optical in-situ sensors capture dissolved organic carbon (DOC) dynamics after prescribed fire in high-DOC forest watersheds
Authors: Olivares Christopher I. , Zhang Wenbo , Uzun Habibullah , Erdem Cagri Utku , Majidzadeh Hamed , Trettin Carl , Karanfil Tanju , Chow Alex
Published: October 2019

Fires alter terrestrial dissolved organic carbon (DOC) exports into water, making reliable post-fire DOC monitoring a crucial aspect of safeguarding drinking water supply. We evaluated DOC optical sensors in a pair of prescribed burned and unburned first-order watersheds at the Santee Experimental Forest, in the coastal plain forests of South Carolina, and the receiving second-order watershed during four post-fire storm DOC pulses. Median DOC concentrations were 30 and 23mgL−1 in the burned and unburned watersheds following the first post-fire storm. Median DOC remained high during the second and third storms, but returned to pre-fire concentrations in the fourth storm. During the first three post-fire storms, sensor DOC load in the burned watershed was 1.22-fold higher than in the unburned watershed. Grab samples underestimated DOC loads compared with those calculated using the in-situ sensors, especially for the second-order watershed. After fitting sensor values with a locally weighted smoothing model, the adjusted sensor values were within 2mgL−1 of the grab samples over the course of the study. Overall, we showed that prescribed fire can release DOC during the first few post-fire storms and that in-situ sensors have adequate sensitivity to capture storm-related DOC pulses in high-DOC forest watersheds.
Resilience of a ponderosa pine plantation to a backfiring operation during a mid-summer wildfire
Authors: Zhang Jianwei , Finley Kaelyn A. , Knapp Eric E.
Published: October 2019

The Mill Fire, which burned in north-western California during the summer of 2012, provided a unique research opportunity when firefighters implemented a backfiring operation to limit wildfire growth. This backfire was ignited and burned through research plots from a long-term study designed to determine the effects of tree density manipulation and shrub control on the growth and stand development of a ponderosa pine plantation. The objectives of this study were to examine the response of these 53-year-old trees to the backfire and to determine how the fire effects differed with plantation structure and composition. Measurements made 4 years post-fire showed that mortality rate was highly variable (from 0 to 100%) and did not relate to tree density, height of live crown, total basal area or shrub cover. Bole char height explained 65% of the variation in mortality rate. Fire appeared to spread primarily through the surface litter and killed a substantial proportion of the shrubs competing with the trees for water and nutrients. Importantly, post-fire tree growth was not significantly affected relative to pre-fire growth. A lack of negative effects of the fire on radial growth was possibly a result of release from inter-tree and shrub competition, which balanced any declines that might have been expected from bole injury or crown loss. Results from the present study demonstrate that ponderosa pine plantations could potentially be treated with managed fire (e.g. prescribed fire) without pretreatment (i.e. thinning, mastication), and still achieve good survival and improved resilience to wildfires burning under uncontrolled conditions.
(Re)manufacturing consent in English
Authors: Gu Chonglong
Published: October 2019

Unlike the use of force or coercion, the articulation of ideological discourse constitutes a softer approach in
the legitimation and hegemonic rule of dominant political actors, achieved through manufacturing consent (Gramsci 1971). As a major site of ideology, the televised premier’s press conferences in China represent
such a discursive event, enabling the Chinese government to convey its discursive formations or “regime of truth” (Foucault 1984) and in doing so to manufacture consent. Benefitting from a corpus
containing 20 years of China’s Premier-Meets-the-Press conference data (1998–2017), this corpus-based critical discourse analysis
(CDA) study explores the government-affiliated interpreters’ mediation and (re)construction of China’s discourse on PEOPLE. The
interpreters are found to reinforce China’s discourse on PEOPLE (e.g., increased mentions of PEOPLE-related items) and
(re)construct a more positive image of Beijing being people-oriented and concerned with its people in English (e.g., the repeated
employment of ‘our people’). An examination of the collocational patterns relating to the item ‘people’ (e.g., people’s,
of/to/for/by*people) (re)presented in the English discourse sheds light on the government‒people ties in China. This article
highlights the government interpreters’ vital agency role in image (re)construction and in contributing to the government’s
political legitimation and hegemonic rule, particularly given the increasingly mediat(is)ed world we live in.
Drive, filter, and stick: A protein sorting conspiracy in photoreceptors
Authors: Brown Aidan I. , Koslover Elena F.
Published: October 2019

The sorting of proteins into different functional compartments is a fundamental cellular task. In this issue, Maza et al. (2019. J. Cell Biol. https://doi.org/10.1083/jcb.201906024) demonstrate that distinct protein populations are dynamically generated in specialized regions of photoreceptors via an interplay of protein-membrane affinity, impeded diffusion, and driven transport.
A Fourier approach to the inverse source problem in an absorbing and anisotropic scattering medium
Authors: Fujiwara Hiroshi , Sadiq Kamran , Tamasan Alexandru
Published: October 2019

We revisit the inverse source problem in a two dimensional absorbing and scattering medium and present a direct reconstruction method, which does not require iterative solvability of the forward problem, using measurements of the radiating flux at the boundary. The attenuation and scattering coefficients are known and the unknown source is isotropic. The approach is based on the Cauchy problem for a Beltrami-like equation for the sequence valued maps, and extends the original ideas of Bukhgeim from the non-scattering to the scattering media. We demonstrate the feasibility of the method in a numerical experiment in which the scattering is modeled by the two dimensional Henyey–Greenstein kernel with parameters meaningful in optical tomography.
Content structure and analogies in introductory electricity chapters of physics schoolbooks
Authors: Schubatzky Thomas , Rosenberger Michael , Haagen-Schützenhöfer Claudia
Published: October 2019

Introductory electricity is a difficult topic for most lower secondary students, especially the development of an adequate conceptualisation of voltage is seen as a major obstacle. A few instructional concepts concerning the teaching and learning of physics have been proven helpful when it comes to constructing conceptual knowledge. For example, the choice of content structure, meaningful elementarisation of basic concepts or adequate use of analogies. What has not been in the focus is how physics school textbooks consider these factors. In this article, we compare four widely used Austrian physics school textbooks concerning their content structure, definition of basic concepts and their use of analogies. Results show that the concept of ‘content structure diagrams’ is a useful tool to analyse schoolbooks. Although Austria has a compulsory syllabus, the four schoolbooks greatly differ in the amount of covered content and interlinking of concepts. However, a few common approaches regarding the sequencing of the concepts were identified and are reported in this article.
Validating polarization effects in γ-rays elastic scattering by Monte Carlo simulation
Authors: Omer Mohamed , Hajima Ryoichi
Published: October 2019

The polarization properties of γ-rays elastically scattered by atoms have become more observable with the development of polarized photon beams. However, systematic studies are required to explore the elastic scattering in the MeV-energy range of the spectrum where Delbrück scattering becomes more significant, especially at large scattering angles. We implement a new Monte Carlo simulation to account for the polarization effects of elastic scattering. The simulation is based on explicit expressions driven in the formalism of Stokes parameters. The scattering amplitudes of Rayleigh, nuclear Thomson, and Delbrück scattering processes are superimposed onto a two orthogonal set of complex amplitudes. This set is then exploited to construct the core of the simulation in such a way that the simulation can handle arbitrary polarization states of the incoming beam and correspondingly generate polarization states of the outgoing beam. We demonstrate how the polarization of scattered photons is affected by the polarization of incoming photons. In addition, we explain the dependence of depolarization on the azimuthal angle.
Robust and broadband integrated terahertz coupler conducted with adiabatic following
Authors: Huang Wei , Yin Shan , Zhang Wentao , Wang Kaili , Zhang Yuting , Han Jiaguang
Published: October 2019

As the key concept in fabricating integrated device, surface plasmon-polaritons (SPPs) have been widely employed to artificially manipulate the electromagnetic waves in metallic surfaces. However, due to the highly structure-dependent resonance of SPPs, it is challengeable to develop a fixed device which can function at wide band. Here, we propose a novel broadband and robust SPPs directional coupler based on the tri-layered curved waveguides working at terahertz (THz) frequencies, where the coupling of SPPs between the adjacent waveguides can be modeled with coupled mode theory. By introducing the stimulated raman adiabatic passage quantum control technique, we achieve the complete transfer of SPPs from the input to the output waveguides in the range of 0.9–1.3 THz, and even considering the propagation loss, the transfer rate is still above 70%. Furthermore, the performance of our device is eminently robust because of its insensitivity to the geometry of structure and the wavelength of SPPs. As a result, our device can tolerate defect induced by fabrication processing and manipulate THz waves at broadband. This finding provides a new theoretical guideline in promoting THz on-demand applications, which is of significance in developing integrated THz devices.
Nonlinear mode coupling and internal resonance observed in a dusty plasma
Authors: Ding Zhiyue , Qiao Ke , Ernst Nicholas , Kong Jie , Chen Mudi , Matthews Lorin S , Hyde Truell W
Published: October 2019

In this paper, we report the first experimental observation of internal resonance in a dusty plasma, which shows the intrinsic nonlinearities of dust interactions in plasmas. When driving a system of vertically aligned dust particle pairs in the vertical direction, the horizontal motion is found to be excited during onset of internal resonance when the higher-frequency horizontal sloshing mode is nonlinearly coupled to the vertical breathing mode through the 1:2 commensurable relation. A theoretical model of the nonlinear interaction of dust particles in plasma is also provided and the results of the theoretical model are shown to match experimental observations.
Quantum-enhanced learning of rotations about an unknown direction
Authors: Mo Yin , Chiribella Giulio
Published: October 2019

We design machines that learn how to rotate a quantum bit about an initially unknown direction, encoded in the state of a spin-j particle. We show that a machine equipped with a quantum memory of

O
(
log
j
)

qubits can outperform all machines with purely classical memory, even if the size of their memory is arbitrarily large. The advantage is present for every finite j and persists as long as the quantum memory is accessed for no more than

O
(
j
)

times. We establish these results by deriving the ultimate performance achievable with purely classical memories, thus providing a benchmark that can be used to experimentally demonstrate the implementation of quantum-enhanced learning.
Interacting bosons in two-dimensional lattices with localized dissipation
Authors: Roy Arko , Saha Kush
Published: October 2019

Motivated by the recent experiments on engineering localized losses in quantum gases, we study the dynamics of interacting bosons in a two-dimensional optical lattice with local dissipation. Together with the Gutzwiller mean-field theory for density matrices and Lindblad master equation, we show how the onsite interaction between bosons affects the particle loss for various strengths of dissipation. For moderate dissipation, the trend in particle loss differs significantly near the superfluid-Mott boundary than the deep superfluid regime. While the loss is suppressed for stronger dissipation in the deep superfluid regime, revealing the typical quantum Zeno effect, the loss near the phase boundary shows non-monotonic dependence on the dissipation strength. We furthermore show that close to the phase boundary, the long-time dissipative dynamics is different from the deep superfluid regime. Thus the loss of particle due to dissipation may act as a probe to differentiate strongly-correlated superfluid regime from its weakly-correlated counterpart.
Polarization resolved analysis of phonon transport in a multi-terminal system*
Authors: Gu Yun-Feng , Zhu Liu-Tong , Wu Xiao-Li
Published: October 2019

The atomistic Green’s function method is improved to compute the polarization resolved phonon transport in a multi-terminal system. Based on the recent developments in literature, the algorithm is simplified. The complex phonon band structure of a semi-infinite periodic terminal is obtained by the generalized eigenvalue equation. Then both the surface Green’s function and phonon group velocity in the terminal are determined from the wave modes propagating away from the scattering region along the terminal. With these key ingredients, the individual phonon mode transmittance between the terminals can be calculated. The feasibility and validity of the method are demonstrated by the chain example compared with the wave packet method, and an example of graphene nanojunction with three terminals.
Consistency check on the fundamental and alternative flux operators in loop quantum gravity *
Authors: Yang Jinsong , Ma Yongge
Published: October 2019

There are different constructions of the flux of triad in loop quantum gravity, namely the fundamental and alternative flux operators. In parallel to the consistency check on the two versions of operator by the algebraic calculus in the literature, we check their consistency by the graphical calculus. Our calculation based on the original Brink graphical method is obviously simpler than the algebraic calculation. It turns out that our consistency check fixes the regulating factor

of the Ashtekar-Lewandowski volume operator as

, which corrects its previous value in the literature.
Lyapunov-type inequalities for a class of nonlinear higher order differential equations
Authors: Wang Haofan , Guo Xu , Zheng Jun
Published: October 2019

In this work, we establish several Lyapunov-type inequalities for a class of nonlinear higher order differential equations having a form

(

ψ
(

u

(
m
)

(
x
)
)

)

’

+

∑

i
=
0

n

r
i

(
x
)

f
i

(

u

(
i
)

(
x
)
)

=
0

, with anti-periodic boundary conditions, where m > n ≥ 0 are integers, ψ or fi
(i = 0,1,2,…,n) satisfies Lieberman-type structural condition. The obtained inequalities are extensions and complements of the existing results in the literature.
An expert weighting method based on affinity propagation clustering algorithm
Authors: Liu Bingqi , Hu Jianbo , Wang Yingyang , Liu Chang
Published: October 2019

Since the expert weighting method based on fuzzy kernel clustering algorithm is sensitive to initializing the clustering center, it is difficult to converge the iterative results to the global optimum. In this paper, an expert weighting method based on affinity propagation (AP) clustering algorithm is proposed to solve the problem of unreasonable clustering. This method uses AP clustering algorithm to cluster experts, since the number of clusters does not need to be set in advance, the clustering result is prevented from being limited by the selection of the initial cluster center, and improves the rationality of clustering. At the same time, the deviation entropy model is constructed to obtain the weights of experts, and effectively avoids the problem of the weighting method based on consistency ratio and information entropy that the consistency ratio and information entropy are equal but the expert opinions are different, and makes the expert weighting more scientific. The example indicates that the proposed method is feasible and effective.
Failure probability-based global and regional sensitivity analysis using copula
Authors: He Liangli , Lu Zhenzhou
Published: October 2019

In risk and reliability assessment, the failure probability-based global sensitivity analysis (GSA) and the failure probability-based regional sensitivity analysis (RSA) have attracted much interest. In this article, we deduce the relationship of the failure probability-based GSA importance measure and copula, and point out that the failure probability-based GSA importance measure can be interpreted as the dependence measure between the failure probability and the input variables from copula viewpoint. To calculate the importance measure, the least square fitting copula (LSFC) method is proposed subsequently. The method decouples the double-loop estimating of the conditional failure probability. Additionally, to analyze and identify the effects of the different regions of the input variables on failure probability, a RSA importance measure is proposed, its properties are investigated and proved. At last, an engineering example is employed to demonstrate and validate the effectiveness of the LSFC method and the proposed RSA importance measure.
The faster lattice sieving for SVP
Authors: Song Huibing , Gu Chunxiang , Zheng Yonghui
Published: October 2019

The security of lattice-based cryptography is based on the hardness of the difficult problems on lattice, especially the famous shortest vector problem. There are many famous heuristic lattice sieving algorithms to solve SVP, such as the Gauss Sieve, NV Sieve, which deal the full-rank n-dimensional lattice from start. Inspired by the idea of rank reduction, in this paper we present new technique on lattice sieving to make the algorithm solve the SVP faster. We split the basis of “bigger” lattice into several blocks according to some rule until the sublattice is small enough. Then we recursively sieved on these sub-lattices to get short vector lists. With the short vector lists, we can find the shortest vector when the algorithm recoverd the original lattice. This lead to obviously speedup with the recursive procedure without extra space overhead. Compared with the Gauss Sieve, the new method converge faster, and achieved at least 70% acceleration.
Stable and unstableperiodic solutions for quadratic contact Hamiltonians with a small parameter
Authors: Huang Yanan , Jia Leilei , Sun Xiuyu , Li Zhanyong
Published: October 2019

In this paper, we study the existence of periodic solutions for a class of quadratic contact Hamiltonian system with a small parameter by averaging theory.We have proved that the quadratic contact Hamiltonian system has a stable periodic solution and an unstable periodic solution when the corresponding parameter is small enough.
On Jensen’s inequality for the power function of norm of bounded linear operators
Authors: Li Zheng , Zhang Tie , Li Changjun
Published: October 2019

Some Jensen’s inequalities for the power function of norm of bounded linear operators are proposed. First, a Jensen’s inequality for a power function on ℝ is investigated. Based on it, Jensen’s inequality for the power function of norm of bounded linear operators is established. Finally, the discussion extends to the polynomial with non-negative coefficients of the power function of the norm, and corresponding Jensen’s inequality is obtained.
Sufficient optimality conditions for nondifferentiable multiobjective programming problem with generalized uniform invexity
Authors: An Gang , Gao Xiaoyan
Published: October 2019

In this paper, a new class of generalized invex functions named generalized uniform pseudoinvex (C, q) – type I, generalized uniform pseudoquasi-invex (C, q) – type I and generalized uniform quasipseudo-invex (C, q) – type I are defined by utilizing the Clarke subdifferential, where C is sublinear in the third argument. Then some sufficient optimality conditions are derived and proved for a class of nondifferentiable multiobjective programming problems involving the new generalized uniform invexity.
Research on the influence of different data distributions on the fitting results of subsonic compressible flow turbulence level and its uncertainty
Authors: Du Yufeng , Wang Xunnian , Lin Jun , Xiong Neng
Published: October 2019

On the basis of results of subsonic compressible flow turbulence level in high speed wind tunnels by hyperbolic fitting, the uncertainty of turbulence level is quantitatively studied by using Monte Carlo simulation method. In order to generate stochastic sample data for Monte Carlo simulation, two distribution types, uniform distribution and normal distribution, are used to generate the data points to be fitted. The effect of changing characteristic parameters of two distribution types on the turbulence fitting results and its uncertainty is studied. The results show that: (1) for uniform distribution, the larger the data distribution bandwidth is, the larger turbulence level and its uncertainty is; (2) for normal distribution, when the mean of the distribution is fixed and the standard deviation is changed, turbulence level results are basically the same, and the uncertainty and the standard deviation have the same trend; (3) comparing the two distribution types, turbulence level and its uncertainty can both be accurately solved, as long as the characteristic parameters are appropriate.
The existence of strong solution for a nonlinear elliptic equation
Authors: Li Junyan , Shen Jieqiong
Published: October 2019

In this paper, the existence of strong solution for a fully nonlinear elliptic equation is proved by using the acute angle principle for the compulsorily weakly continuous operator. Firstly, the space of function and the abstract operator are chosen according to the elliptic equation. Furthermore, it is proved that the operator satisfies the acute angle condition and is compulsorily weakly continuous. Thus the existence of strong solution for the nonlinear elliptic equation is obtained.
Balance of uplink and downlink energy consumption based on geometric weighting
Authors: Xu Peng , Yang Yanfei , Song Xin , Liu Guangli
Published: October 2019

In this paper, we study a full-duplex MIMO single-cell system in which a full-duplex MIMO base station simultaneously exchanges information with multiple single-antenna users. Full-duplex introduces additional self-interference and multi-user interference compared to half-duplex, resulting in conflicting coupling between the uplink and downlink. Therefore, we use the geometric weighted multi-objective method to weigh the uplink and downlink transmit power minimization problem under the minimum rate constraint. By transforming the original non-convex problem into a convex problem, a new weight function is established by means of geometric weighting to balance energy consumption better between the uplink and downlink. Through numerical simulations, it shows that the proposed algorithm shows better energy saving gain than the original method.
Interior-point methods for second-order cone optimization based on the generalized trigonometric barrier function
Authors: Xie Pengyang , Su Jinwei , Peng Xinyin
Published: October 2019

In this article, primal-dual interior-point methods (IPMs) for second-order cone optimization (SOCO) based on the generalized trigonometric barrier function are studied. Furthermore, we derive the iteration bounds of large- and small-update IPMs for SOCO.
Unmanned aerial vehicle (UAV) image haze removal using dark channel prior
Authors: Yu Jimin , Wang Yaoheng , Zhou Shangbo , Zhai Rumeng , Huang Saiao
Published: October 2019

The unmanned aerial vehicle (UAV) image taken in foggy or haze weather usually has lower contrast and fidelity, the quality of the image is seriously degraded. In this paper, we propose a dehazing model based on dark channel prior to dehaze the UAV image. We use a quad-tree hierarchical searching method to estimate the atmospheric light value, it can effectively avoid the influence of white objects in the image on the estimation of atmospheric light values. In the process of refining the medium transmission map, we propose a new regularization optimization scheme. Experimental results show that the proposed approach effectively recover the clear UAV image.
Global stability of a stochastic Beddington-DeAngelis type predator-prey model with time delay and stage structure for prey incorporating refuge
Authors: Fu Yanfang , Zhou Kai
Published: October 2019

In this paper, we first propose a stochastic Beddington-DeAngelis type predator-prey model with time delay and stage structure for prey incorporating refuge. Then, we obtain the existence and uniqueness of the global positive solution for this model. By constructing proper Lyapunov function, we establish the sufficient criteria for the global stability of the positive equilibrium point. At the last, we performed some numerical simulations to verify the main results.
Boundary feedback stabilization of a Rao-Nakra sandwich beam
Authors: Wang Yang
Published: October 2019

In this paper, we study the boundary feedback stabilization of a three-layer Rao-Nakra sandwich beam. Since we found a proper state space so that the energy of the system is dissipative. We then convert the beam system to an abstract first-order evolution equation with operator A. Afterwards, we obtain A is the infinitesimal generator of a C
0 – semigroup of contractions by using semigroup theory. The boundary damping makes the system is stable of order 1/2, which is proved by using the frequency domain characterization of polynomial stability.
MRT-LBM modelling of the oscillatory gas slide film damping in the transition regime
Authors: Li Pu , Song Xucheng
Published: October 2019

In this paper, the slide film damping (SFD) of micro-scale oscillatory Couette flow has been researched by an effective multiple relaxation time lattice Boltzmann method (MRT-LBM). The validity and effectiveness of MRT-LBM for solving SFD have been verified through contrasting the velocity distribution between the upper plate and the substrate of MRT-LBM and the direct simulation Monte Carlo (DSMC) model. The impacts of the vibration frequency and gap of plates on the damping are discussed, and the result shows that the nonlinear character of velocity profiles is manifest and SFD increases substantially for a larger vibration frequency in the oscillatory gas flow; SFD reduces obviously with the gap increases. Consequently, the results further confirm the implementation of LBM in analysis of the non-equilibrium micro-scale gas flow.
Electronic properties for detection of DNA methylation
Authors: Tian Yigeng , Liu Zhongqi , Cheng Yingying , Liu Haiying
Published: October 2019

Detection of DNA methylation is of great significance for early diagnosis and precise treatments of related cancers. We calculated electronic properties of base pairs including cytosine (C), 5-methylcytosine (5mC), 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC) with guanine (G). Calculation results show that modifications can regulate the energy gap of base pairs mainly by changing distributions of frontier orbitals and would not reduce the efficiency of charge transfer in DNA. 5fCG and 5caCG have better electrical transport properties due to the narrower gap and higher electron affinity compared with that of CG. Modified base pairs would remain stable when charge transport and not notably strengthen or weaken hydrogen bonding interactions of paired bases. Moreover, transverse electronic transport properties of benzamide with C and 5mC were studied by using the density functional theory (DFT) combined with the non-equilibrium green function (NEGF). The obtained current values of two systems have obvious difference under 0-0.2V biases, thus realizing the distinction of methylated cytosine.
Formulation of parameters of three-layer thermal protective clothing based on Fourier’s law
Authors: Luo Yu , Li Shuyi , Ye Shiqi
Published: October 2019

With the rapid development of metallurgy, construction, machinery manufacturing and petrochemical industry, safety accidents often occur under high-temperature working environment. Therefore, this paper analyses the heat conduction process of thermal protective clothing, according to the analysis of unstable heat conduction process with Conservation of Energy and Fourier’s law, so as to get the distribution of temperatures with the thickness variation of the material layer. Furthermore, we shall fit the relation between temperature and the thickness of the material layer when the heat transfer reaches steady state, and then determine the optimal range of the thickness of the thermal protective clothing material layer with the upper bound being the highest temperature which human can tolerate. And it can be promoted to the fields of fire protection, metallurgy, machinery manufacturing and other high temperature work.