bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the (establishment of) path of realizing the targeted poverty alleviation through tourism under the perspective of all-for-one tourism
Authors: Dan Su 
Published: April 2021

Under the strategic perspective of building a moderately prosperous society in an all-round way, General Secretary Xi Jinping put forward the guiding ideology of “precise poverty alleviation”. The report of the 19th National Congress of the Communist Party of China also pointed out that the main contradictions in my country’s society have been transformed, and tourism is the top of the happy and green industries. Industry is an important symbol of the improvement of people’s living standards. Taking tourism development as an entry point has become another effective measure for targeted poverty alleviation. The concept of all-for-one tourism has pointed out the direction for the development of the tourism industry, which is conducive to the improvement of regional economic levels and is an effective means of tourism poverty alleviation. Based on the discussion of allfor- one tourism and targeted poverty alleviation, this article analyzes the current development of tourism in Ejin Horo Banner of the Ordos and the status quo of tourism poverty alleviation, explore the path to achieve tourism poverty alleviation to help Inner Mongolia achieve comprehensive poverty alleviation by the study of the coupling mechanism of the two.
Tourism poverty alleviation is the most typical type of industrial poverty alleviation, and it is a powerful starting point and focus for building a moderately prosperous society in an all-round way. In this process, as a new research horizon, all-for-one tourism has realized the completeness of tourism in terms of space, industry, elements and management. It is an important means of tourism poverty alleviation, and the coupling mechanism of all-for-one tourism and tourism poverty alleviation should provide a new paradigm for further expanding the realization path of targeted poverty alleviation
Outcome of Surgical Interventions and Deliveries in Patients with Bleeding of Unknown Cause: An Observational Study
Authors: Veen Caroline S. B. , Huisman Elise J. , Romano Lorenzo G. R. , Schipaanboord Celesta W. A. , Cnossen Marjon H. , de Maat Moniek P. M. , Leebeek Frank W. G. , Kruip Marieke J. H. A. 
Published: April 2021

AbstractBackground The most optimal management for patients with bleeding of unknown cause (BUC) is unknown, as limited data are available.Objective Evaluate management and outcome of surgical procedures and deliveries in patients with BUC.Materials and Methods All patients ≥12 years of age, referred to a tertiary center for a bleeding tendency, were included. Bleeding phenotype was assessed and hemostatic laboratory work-up was performed. Patients were diagnosed with BUC or an established bleeding disorder (BD). Data on bleeding and treatment during surgical procedures and delivery following diagnosis were collected.Results Of 380 included patients, 228 (60%) were diagnosed with BUC and 152 (40%) with an established BD. In 14/72 (19%) surgical procedures major bleeding occurred and 14/41 (34%) deliveries were complicated by major postpartum hemorrhage (PPH). More specifically, 29/53 (55%) of the BUC patients who underwent surgery received prophylactic treatment to support hemostasis. Despite these precautions, 4/29 (14%) experienced major bleeding. Of BUC patients not treated prophylactically, bleeding occurred in 6/24 (25%). Of pregnant women with BUC, 2/26 (8%) received prophylactic treatment during delivery, one women with and 11 (46%) women without treatment developed major PPH.Conclusion Bleeding complications are frequent in BUC patients, irrespective of pre- or perioperative hemostatic treatment. We recommend a low-threshold approach toward administration of hemostatic treatment in BUC patients, especially during delivery.
Not All About Farming: Understanding Aspirations Can Challenge Assumptions About Rural Development
Authors: Mausch Kai , Harris Dave , Dilley Luke , Crossland Mary , Pagella Tim , Yim Jules , Jones Emma 
Published: April 2021

AbstractRural development is a political topic in which debate has been more focussed on externally identified needs than on demands or aspirations of the rural population and polarised between the attractions of urban income earning opportunities and the importance of rural farming communities for national food provision. The heterogeneity of local aspirations and their implications for development have barely been considered. We explore the aspirations of residents of three contrasting regions in Kenya that vary in their agricultural and off-farm potential. We argue that opportunities are a major framing influence on aspirations but there is important, and routinely overlooked, diversity within the communities which could inform future options for effective development. We outline how development initiatives could be redesigned to align more closely with aspirations. However, aspirations are a complex concept and, while our approach offered novel insights, these would be enriched when combined with household survey data.
Simulation of stray laser light of Thomson scattering systems in the HL-2M tokamak
Authors: Liu C. H. , Huang Y. , Hou Z. P. , Wang Y. Q. , Feng Z. , Zhai W. Y. 
Published: April 2021

Stray laser light is a serious problem that interrupts the measurement of electron temperature and density in Thomson scattering (TS) systems. This paper presents a ray-tracing simulation of stray laser light in HL-2M TS systems. A model including (i) a simplified laser-beam injection system, (ii) the scattered-light collection systems for central-point TS (CPTS) and edge TS (ETS), and (iii) the HL-2M vessel is built using the TracePro and CATIA software packages based on measurements of the bidirectional scattering distribution function at a wavelength of 532 nm. The simulation results show that no stray laser light reaches the injection surface of the collection lens of the CPTS system, and only a few stray laser rays of all the rays reaching the injection surface of the collection lens of the ETS system can be collected when the energy threshold per ray is 1 × 10−16. The stray laser rays that reach the scattered-light collection systems are mainly from the first and second parts of the slides of the beam dump, so decreasing the roughness of those parts could be effective in reducing the level of stray laser light.
Modular bolometric/soft x-ray diagnostic in Sino-UNIted Spherical Tokamak
Authors: Yang Menghua , Wang Binbin , Tan Yi , Gao Zhe 
Published: April 2021

A bolometer/soft x-ray diagnostic based on modular absolute extreme ultraviolet photodiodes has been built to obtain the local emission profile of a poloidal cross section in Sino-UNIted Spherical Tokamak (SUNIST). The system consists of seven photodiode arrays of 112 channels located around the low field side of a poloidal cross section. All arrays are mounted into 81 × 36 × 33 mm3 modules, which could be installed flexibly on the wall of the vacuum vessel. Tungsten shields with adjustable pinholes restrict the radiation flux. Compact flexible printed circuits with multilayer copper polygon poured on both sides are designed to transmit signals with electronic noise, which is reduced to less than 1/10 before. A two-stage transimpedance amplifier array of 700 kHz bandwidth is fixed on the atmosphere side of a vacuum electrical feedthrough and is powered by battery packs. A synchronized switch shuts down the circuit to reduce the heat production and increase the battery life. A line-integrated radiation emission profile with 2 cm spatial resolution and temporal resolution up to 2 µs is obtained, and the local emission profile of SUNIST is reconstructed with the help of a newly developed tomography scheme for movable detector modules.
Coccus celatus (coffee green scale).
Authors: Bigger Mike 
Published: April 2021

Abstract

The female lays eggs which hatch within a matter of hours. There are three nymphal stages which are mobile. The adult female is sedentary and covered by an ovoid, green scale, about 3.5 mm long and only slightly convex. All stages feed principally on the underside of the leaf generally close to a vein but may also be found on green shoots, fruits and other parts of the plant. In Uganda it was reported (as C. consimilis) to be found on the collar of the plant at or just below ground level (De Lotto, 1960). Associations: Ants such as Tetramorium aculeatum (Uganda; De Lotto, 1960) and Solenopsis geminata (Papua New Guinea; Buckley and Gullan, 1991) which feed on the honeydew, build earth covers over the colonies. Oecophylla longinoda (Ivory Coast; Couturier et al., 1985), Crematogaster sp. (Papua New Guinea; Murphy, 1985), Paratrechina sp. (Papua New Guinea; Murphy, 1985), Pheidole sp. (Papua New Guinea; Murphy, 1985) and Technomyrmex albipes (Papua New Guinea; Murphy, 1985) also tend colonies. The presence of ants undoubtedly hinders attacks by natural enemies both by shielding the colonies and by removing honeydew. Murphy et al. (2011) attest that in Papua New Guinea 14 species of ant attend C. celatus/C. viridis populations of which only two are native (Rhoptromyrmex sp1 and Rhoptromyrmex melleus). By contrast six exotics and six species (origin unknown) attend the scales. The three spatially most common and abundant exotic species were Anoplolepis gracilipes (yellow crazy ant), Pheidole megacephala (African big-headed ant) and T. albipes (white footed ant).
Impact of compressive and tensile epitaxial strain on transport and nonlinear optical properties of magnetoelectric BaTiO3-(LaCa)MnO3 tunnel junction
Authors: Ivanov M S , Buryakov A M , Vilarinho P M , Mishina E D 
Published: April 2021

Abstract
This work is devoted to disclosing the effect of epitaxial strain on crystallographic, transport, and nonlinear optical properties of a bilayer structure consisting of one ferroelectric (FE) (BaTiO3 with a thickness of 4 nm) and one ferromagnetic (La0.7Ca0.3MnO3 with the thickness of 12 nm) layers. Both tensile (of about ∼6% caused by the MgO substrate) and compressive (of about ∼1% caused by the SrTiO3 substrate) strains reduce the bulk metal-to-insulator phase transition temperature of the La0.7Ca0.3MnO3 layer from 240 K towards 195 K and 160 K, respectively. The appearance of the effect of colossal electroresistance, linear and nonlinear current–voltage behaviours and contribution of FE polarization switching in the BaTiO3 layer to the conductivity are associated with the influence of epitaxial strain. The predominance of the compressive over the tensile strain leads to the hysteresis behaviour of electroresistance, maximum conductivity caused by the resonant-tunnelling mechanism, and strong nonlinear optical dependence on the applied electric field.
An effective determination of the minimum circumscribed circle and maximum inscribed circle using the subzone division approach
Authors: Huang Jingzhi , Yang Runze , Ge Haiqiao , Tan Jiubin 
Published: April 2021

Abstract
Aiming to develop a more effective circularity evaluation method that satisfies the definition of a particular reference circle criterion, this paper proposes a strategy to determine the minimum circumscribed circle (MCC) and maximum inscribed circle (MIC) using the subzone division approach. The whole circumference zone space that encloses all the sampling data points is divided into different subzones to determine the target candidate feature points, which are used for constructing the MCC or MIC. The first feature point of the MCC/MIC is evaluated according to the farthest/nearest distance from the center of the least squares circle (LSC) within the whole circumference subzone. Subzone with a 120° central angle is designated in the direction of the first feature point that is mapped about the center of the LSC. The second candidate feature point is constrained and determined within this subzone. The third subzone, which contains the third feature point, is formed in the direction of the first and second feature points that are mapped about the center of the LSC. The mathematical model of the MCC or MIC is then constructed using these three feature points. Experimental examples (using five different datasets) and a comparison with previous studies demonstrate that the proposed method yields the exact solution for the MIC and MCC in only 1–2 iterations.
Structural and physical-chemical characterization of redox active CeO2 nanoparticles synthesized by precipitation in water-alcohol solutions
Authors: Shlapa Yuliia , Timashkov Illia , Veltruska Katerina , Siposova Katarina , Garcarova Ivana , Musatov Andrey , Solopan Sergii , Kubovcikova Martina , Belous Anatolii 
Published: April 2021

Abstract
A set of cerium dioxide nanoparticles (CeO2 NPs) was synthesized by precipitation in water-alcohol solutions under conditions when the physical-chemical parameters of synthesized NPs were controlled by changing the ratio of the reaction components. The size of CeO2 NPs is controlled largely by the dielectric constant of the reaction solution. An increase of the percentage of Ce3+ ions at the surface was observed with a concomitant reduction of the NP sizes. All synthesized CeO2 NPs possess relatively high positive values of zeta-potential (ζ > 40 mV) suggesting good stability in aqueous suspensions. Analysis of the valence- and size-dependent rate of hydrogen peroxide decomposition revealed that catalase/peroxidase-like activity of CeO2 NPs is higher at a low percentage of Ce3+ at the NP surface. In contrast, smaller CeO2 NPs with a higher percentage of Ce3+ at the NP surface display a higher oxidase-like activity.
Microdosimetry in low energy proton beam at therapeutic-equivalent fluence rate with silicon 3D-cylindrical microdetectors
Authors: Guardiola C , Bachiller-Perea D , Prieto-Pena J , Jiménez-Ramos M C , García López J , Esnault C , Fleta C , Quirion D , Gómez F 
Published: April 2021

Abstract
In this work we show the first microdosimetry measurements on a low energy proton beam with therapeutic-equivalent fluence rates by using the second generation of 3D-cylindrical microdetectors. The sensors belong to an improved version of a novel silicon-based 3D-microdetector design with electrodes etched inside silicon, which were manufactured at the National Microelectronics Centre (IMB-CNM, CSIC) in Spain. A new microtechnology has been employed using quasi-toroid electrodes of 25 μm diameter and a depth of 20 μm within the silicon bulk, resulting in a well-defined cylindrical radiation sensitive volume. These detectors were tested at the 18 MeV proton beamline of the cyclotron at the National Accelerator Centre (CNA, Spain). They were assembled into an in-house low-noise readout electronics to assess their performance at a therapeutic-equivalent fluence rate. Microdosimetry spectra of lineal energy were recorded at several proton energies starting from 18 MeV by adding 50 μm thick tungsten foils gradually at the exit-window of the cyclotron external beamline, which corresponds to different depths along the Bragg curve. The experimental

y

F

¯

values in silicon cover from (5.7 ± 0.9) to (8.5 ± 0.4) keV μm−1 in the entrance to (27.4 ± 2.3) keV μm−1 in the distal edge. Pulse height energy spectra were crosschecked with Monte Carlo simulations and an excellent agreement was obtained. This work demonstrates the capability of the second generation 3D-microdetectors to assess accurate microdosimetric distributions at fluence rates as high as those used in clinical centers in proton therapy.
Magnetic field amplification by high power lasers in underdense plasma
Authors: Wilson T C , Sheng Z-M , Eliasson B , McKenna P 
Published: April 2021

Abstract
The process by which an existing magnetic field of ∼102–103 T may be amplified by an order of magnitude along the axis of laser propagation in underdense plasma by an intense laser pulse is investigated. The mechanism underlying the effect is understood to be ponderomotive in nature, initiated by the

E

×

B

drift motion of electrons displaced by the laser pulse as they relax towards the axis, and sustained by a combination of quasistatic magnetic field structures and electron Hall and diamagnetic currents. We employ two- and three-dimensional particle-in-cell simulations to numerically investigate the process and find qualitative agreement with the scaling relations found in our theory model. The lifetime of the process is considered, and we find the major factor limiting its growth and lifetime is ion motion, which disrupts the electron currents necessary to sustain the induced magnetic field. This field is found to be of sufficient strength, and is long-lived enough to be relevant for study in relation to applications in radiation production and laboratory astrophysics.
Hosting of exceptional points in an atom-field interaction Hamiltonian and manipulation of light states
Authors: Paul Anubhav , Laha Arnab , Ghosh Somnath 
Published: April 2021

Abstract
We report an analytical model to investigate an atom-cavity interaction phenomenon with the consideration of a two-level atom and a quantized mode of the cavity field in the form of harmonic oscillation. Accordingly, we consider the matrix form of a special type of two-level Hamiltonian consisting of three units, explaining a two-level atom, a quantum harmonic oscillator to be equivalent to a quantized cavity-mode field, and an interaction matrix between them, which are connected by some iteration parameters. The iteration parameters of the proposed Hamiltonian have judiciously been modulated to encounter an exceptional point (EP). A specific closed parameter space encircling the embedded EP has been considered to study the dynamics of the coupled states in the context of a flip-of-state phenomenon. We also incorporate a deliberate phase difference between the two unperturbed levels associated with the atomic system and study the phase induced interaction between them in the context of state-flipping around the identified EP. The proposed analytical model indeed opens up a fertile platform to explore a range of interesting applications associated with the atom-cavity interaction.
Generation of nonclassical states by superposition of number-conserving operations on squeezed thermal state
Authors: Ye Wei , Guo Ying , Zhang Huan , Xia Ying , Mao Yun 
Published: April 2021

Abstract
The nonclassicality is the prerequisite for quantum states to be applied into quantum information, especially for quantum metrology. Here we theoretically investigate the non-classical properties of the non-Gaussian state generated by repeatedly operating a number-conserving generalized superposition of products (GSP), i.e., (s
1
aa
† + t
1
a
†
a)m with

s

1

2

+

t

1

2

=
1
,

on the squeezed thermal state (STS), in terms of second-order correlation function, Mandel’s Q parameter, quadrature squeezing and Wigner function (WF). It is shown that, compared to the cases of the STS, the GSP-STS with the high-order GSP operations (m > 1) at the small-squeezing levels can be beneficial to the existence of the photon-antibunching effect, the sub-Poissonian distribution and the partial negativity of the WF, apart from the quadrature squeezing. In addition, for the case of m = 1, we also compare with the non-classical properties of several different non-Gaussian resources, involving the photon-subtracted-then-added (PSTA) STS, the GSP-STS and the photon-added-then-subtracted (PATS) STS. It is found that the PSTA-STS with respect to the sub-Poissonian distribution and the partial negativity of the WF has a better performance than others. Significantly, the generated GSP-STS has an obvious advantage of showing the photon-antibunching effects, compared to the PSTA-STS and the PATS-STS, which means that our scheme may have an excellent guidance for the practical implementations in quantum information.
Released energy formula for proton radioactivity based on the liquid-drop model*
Authors: Pan Xiao , Zou You-Tian , Liu Hong-Ming , He Biao , Li Xiao-Hua , Xiang Dong 
Published: April 2021

Abstract
In this work, based on the liquid-drop model and considering the shell correction, we propose a simple formula to calculate the released energy of proton radioactivity (Q

p
). The parameters of this formula are obtained by fitting the experimental data of 29 nuclei with proton radioactivity from ground state. The standard deviation between the theoretical values and experimental ones is only 0.157 MeV. In addition, we extend this formula to calculate 51 proton radioactivity candidates in region 51 ≤ Z ≤ 83 taken from the latest evaluated atomic mass table AME2016 and compared with the Q

p
calculated by WS4 and HFB-29. The calculated results indicate that the evaluation ability of this formula for Q

p
is inferior to WS4 while better than HFB-29.
A new method of power quality disturbance classification based on deep belief network
Authors: Wang Kang , Xi Yanhui 
Published: April 2021

Abstract
In view of the low accuracy of single disturbances under the problem of noise interference, a new method of power quality disturbance classification based on deep belief network was proposed. A smooth wavelet multiscale transform is performed on the power quality disturbance signal, and then the soft threshold function is used to process the estimated wavelet coefficients for reconstructing the original signal. Further, it is proposed to use deep confidence network to classify and recognize the reconstructed single disturbance signal. The simulation results demonstrate that the recognition rate of this method for seven typical single disturbances is high. Even under 20dB noise interference, the classification accuracy rate is as high as 93% or more, which proves that the method has a strong ability to resist noise interference.
Salient object detection based on Two-stream edge attention guidance
Authors: Wei Li , chunlei Li , yue Miao 
Published: April 2021

Abstract
The existing U-Net structure convolutional neural network is widely used in salient object detection, but the problem of target boundary blur is caused by the convolution pooling operation. In order to keep the edge structure of salient objects clear, a two-stream edge attention guided convolutional neural network (SEANet) method is proposed to strengthen the guided learning of edge features, mainly by guiding the edge features to compare the original image features and the depth features are enhanced to improve the accuracy of salient object detection. The loss is minimized by using consistent cross entropy loss and IOU loss to maximize the coincidence rate of the true value map and the predicted map, as well as the actual boundary and the predicted boundary. At the same time, the obtained prediction map is compared with the current mainstream nine models, and good results have been achieved. Four sets of experiments are carried out in the ablation experiment, and the experimental results also confirmed that the model has a great improvement effect on the performance of salient object detection.
Research of Three Phase PWM Rectifier based on Direct Vector Control Method
Authors: Yan Pang 
Published: April 2021

Abstract
In oilfield worldwide, beam pumping units are wildly used to produce oil. the working mechanism of beam pumping unit determines that its driving motor frequently enters into the state of power generation, so PWM reversible rectifier is an ideal choice for recycle the generated energy, therefore it is necessary to research the control theory of PWM reversible rectifier. The paper presents a digital algorithm for the PWM rectifier, on the basis of coordinate analyzing theory and SVPWM method. The method that directly calculates the basic vector operation time and position is adopted, so the arc-tangent calculation is avoided, calculation process is simplified. Based on the vector coordinate transformation of three-phase reversible PWM rectifier, the control equation of direct current control method is derived in this paper. The rectifier control algorithm is realized with high performance DSP TMS320F28335. The experimental results prove that the method proposed in the paper is practical and correct.