bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vulnerability assessment of marine economic system based on comprehensive index and catastrophe progression model
Authors: Gao Sheng , Sun Huihui , Ma Miaosen , Lu Yanyan , Yao Yuan , Liu Wei 
Published: October 2020

ABSTRACT
The sustainable development of the marine economic system to accurately grasp the dynamic evolution characteristics and main driving factors of the vulnerability of the marine economic system so as to effectively identify the problems in the operation of the marine economy is extremely important. Based on the establishment of a three-level assessment index system for the vulnerability of the marine economic system, the vulnerability of the marine economic system of Jiangsu Province in 2008–2016 was evaluated by using the comprehensive index model and the catastrophe progression model, and the results were compared based on the unified evaluation criteria. The main influencing factors were analyzed by principal component analysis and Pearson correlation analysis. It’s found that 2014, 2015, and 2012 are in a general state, 2009 and 2010 are in a poor state, and the vulnerability state from 2008 to 2011 is lower than that in 2012. The overall volatility is small indicating a stable system. Among them, the scale of marine industry and profit and loss of marine resources are the main components of marine economic system vulnerability having the highest correlation with the vulnerability of marine economic system. This study enriches the theoretical method and empirical research on the vulnerability of the marine economic system and has practical significance in allowing for timely targeted control measures to affect the vulnerability of the marine economic system.
Mechanisms and dynamics of the NH+
2 + H+ and NH+ + H+ + H fragmentation channels upon single-photon double ionization of NH3
Authors: Larsen Kirk A , Rescigno Thomas N , Streeter Zachary L , Iskandar Wael , Heck Saijoscha , Gatton Averell , Champenois Elio G , Severt Travis , Strom Richard , Jochim Bethany , Reedy Dylan , Call Demitri , Moshammer Robert , Dörner Reinhard , Landers Allen L , Williams Joshua B , McCurdy C William , Lucchese Robert R , Ben-Itzhak Itzik , Slaughter Daniel S , Weber Thorsten 
Published: October 2020

Abstract
We present state-selective measurements on the

N
H

2

+

+ H+ and NH+ + H+ + H dissociation channels following single-photon double ionization at 61.5 eV of neutral NH3, where the two photoelectrons and two cations are measured in coincidence using 3D momentum imaging. Three dication electronic states are identified to contribute to the

N
H

2

+

+ H+ dissociation channel, where the excitation in one of the three states undergoes intersystem crossing prior to dissociation, producing a cold

N
H

2

+

fragment. In contrast, the other two states directly dissociate, producing a ro-vibrationally excited

N
H

2

+

fragment with roughly 1 eV of internal energy. The NH+ + H+ + H channel is fed by direct dissociation from three intermediate dication states, one of which is shared with the

N
H

2

+

+ H+ channel. We find evidence of autoionization contributing to each of the double ionization channels. The distributions of the relative emission angle between the two photoelectrons, as well as the relative angle between the recoil axis of the molecular breakup and the polarization vector of the ionizing field, are also presented to provide insight on both the photoionization and photodissociation mechanisms for the different dication states.
Holes in Bayesian statistics
*
Authors: Gelman Andrew , Yao Yuling 
Published: October 2020

Abstract
Every philosophy has holes, and it is the responsibility of proponents of a philosophy to point out these problems. Here are a few holes in Bayesian data analysis: (1) the usual rules of conditional probability fail in the quantum realm, (2) flat or weak priors lead to terrible inferences about things we care about, (3) subjective priors are incoherent, (4) Bayesian decision picks the wrong model, (5) Bayes factors fail in the presence of flat or weak priors, (6) for Cantorian reasons we need to check our models, but this destroys the coherence of Bayesian inference. Some of the problems of Bayesian statistics arise from people trying to do things they should not be trying to do, but other holes are not so easily patched. In particular, it may be a good idea to avoid flat, weak, or conventional priors, but such advice, if followed, would go against the vast majority of Bayesian practice and requires us to confront the fundamental incoherence of Bayesian inference. This does not mean that we think Bayesian inference is a bad idea, but it does mean that there is a tension between Bayesian logic and Bayesian workflow which we believe can only be resolved by considering Bayesian logic as a tool, a way of revealing inevitable misfits and incoherences in our model assumptions, rather than as an end in itself.
DNA-inspired frequency reconfigurable origami antenna using segmented rotation technique
Authors: Shah Syed Imran Hussain , Lim Sungjoon 
Published: October 2020

Abstract
This article proposes a DNA inspired mechanically transformable frequency reconfigurable origami antenna. Further, the implementation of segmented rotation technology enables the folding-unfolding feature of the DNA inspired geometry. The tuning range of 145% with wide frequency sweep from 0.395 to 2.5 GHz is achieved for the proposed antenna. The proposed origami antenna was fabricated on a robust polyethylene terephthalate (PET) substrate, realizing the antenna conductive pattern using copper film. The reflection coefficients and radiation patterns of the fabricated antenna sample were measured for unfolded, partially folded, and completely folded states. The proposed origami antenna provides flexible design, efficient folding, compact packaging, and simple deployment.
Synchronously-pumped, all-solid-state, picosecond Raman laser at 1169 and 1222 nm on single and combined Raman modes in a Ca3(VO4)2 crystal with 30-times pulse shortening down to 1.2 ps
Authors: Frank M , Smetanin S N , Jelínek Jr M , Vyhlídal D , Ivleva L I , Dunaeva E E , Voronina I S , Shukshin V E , Zverev P G , Kubeček V 
Published: October 2020

Abstract
An all-solid-state extracavity synchronously pumped Ca3(VO4)2 Raman laser on broadened stretching (854 cm−1) and bending (354 cm−1) Raman modes with efficient stimulated Raman scattering (SRS) conversion at single frequency shift and the strongest 30-times pulse shortening down to 1.2 ps at combined frequency shift is demonstrated. The antireflection-coated, 78 mm long, a-cut Ca3(VO4)2 crystal was used as an active element under synchronous pumping by the 330 nJ, 1063 nm, 36 ps, 150 MHz mode-locked Nd:GdVO4 laser. SRS oscillation with slope efficiency of 34.2% and conversion of 18.5% at the wavelength of 1169 nm of the 854 cm−1-shifted first Stokes component with the pulse duration of 31 ps and output energy of up to 61 nJ in the external ring cavity with the output coupler reflectivity of 87% has been obtained. In the case of the second setup with high cavity Q-factor for the wavelength of 1169 nm, the additional cascade SRS component at 1222 nm with combined (854 cm−1 + 354 cm−1) frequency shift was observed. This component was generated with the slope efficiency of 8.1% and the output energy of 14.2 nJ with the output coupler reflectivity of 95%. Due to dynamics of SRS build-up in synchronously pumped extracavity Raman laser, the strongest pulse shortening at 1222 nm was achieved. The shortest pulse duration of 1.27 ps was measured at the cavity length detuning of +50 µm.
The role of divertor pumping in plasma detachment and particle exhaust in a closed divertor
Authors: Sang Chaofeng , Stangeby P.C. , Guo H.Y. , Wang Dezhen 
Published: October 2020

Abstract
The impact of pumping on divertor power dissipation and particle exhaust in a closed divertor with flat target configuration is examined using SOLPS modeling. A closed divertor can increase neutral pressure and enhance radiative dissipation; accordingly it has been proposed as a direction for the design of advanced divertors to achieve detachment at as low an upstream plasma density as possible. However, the necessity to pump the closed divertor results in a reduction of the high density and pressure of neutrals near the target. The quantitative effect of this reduction on the achievement of detachment is assessed here. By independently varying both the pumping speed S using different pump opening surface areas, together with the upstream plasma density at the outside midplane,

n

e
,
s
e
p

OMP

, it is established quantitatively how the pump exhaust rate, Q
exh (particles/s), depends on these two quantities. As expected, pumping increases the detachment onset density,

n

e
,
s
e
p

O
M
P
,
o
n
s
e
t

; however, for S = 40 m3 s−1, it is shown that Q
exh = 1 kA and detachment onset—as defined by a peak T
e at the outer target of ∼5 eV—can be obtained simultaneously, which is consistent with DIII-D requirements for particle and energy exhaust. By placing the pump surface at different distances from the target, it is established how the pump location affects Q
exh, which in turn affects the divertor plasma conditions, including achievement of detachment. High pumping speed reduces neutral density and radiated power, thus increasing T
e and the heat flux to the target. The essential difference between the various pump locations is the ratio of Q
exh to the total number of neutral deuterium particles plus carbon particles (atoms and ions) in the outer divertor, f
exh = Q
exh/N
tot-OD. It was found that the best pump location is near the target at the CFR (common flux region) side of the closed divertor slot. Pumping at the PFR (private flux region) side near the target gave similar results, indicating flexibility with regard to pump location in closed divertors with a flat target plate.
Overview on the Preparation and Heat Transfer Enhancement of Nanofluids
Authors: Ji Junyu , Lu Wei , Si Cong , Zhang Shufeng , Yao Xiangyang , Wang Weihua , Chu Delin 
Published: October 2020

Abstract
Due to the great advantages of high thermal conductivity and strong heat exchange capacity, nanofluids have attracted great intrest in many heat exchange fields, such as thermal power plant, solar energy, automobile cooling, nuclear power facilities and so on. In this paper, it reviews the research progress of nanofluids including preparation process, suspension stability, thermal conductivity, viscosity,and gives emphasis to analyse the influence factor of nanofluid convective heat transfer.
Study on the Influence of Polycarboxylate Superplasticizer Compound on the pump PHC
Authors: Fang Yunhui , Ke Yuliang , Zhang Xiaofang , Zhu Shaohong , Qiu Yuetao , Chen Xiaobin , Lin Tianxing , Guo Yuanqiang , Ma Xiuxing 
Published: October 2020

Abstract
This aricle disclosed the effects of polycarboxylate superplasticizer (PCE), air entraining agent, defoamer, accelerator on the properties of prestressed high-strength concrete (PHC). The introduction of DAC and AMPS into the molecular structure of PCE is helpful to improve compressive strength of PHC. The air entraining agent can be used to improve the PHC workability. The Defoamers and accelerators are beneficial for increasing PHC compressive strength. The admixture compounding technology by using PCEs, air entraining agents, defoamers and accelerators can help to get excellent properties of PHC.
Experimental Study on the Flexural Strength of Marble Industrial Powder Concrete
Authors: Li Guishan , Zhang Jintuan , Cai Desuo , Wang Tongkuai , Zhang Fan , Meng Donglin , Hu Qin , Zhang Huaiyang 
Published: October 2020

Abstract
The flexural strength and cube compressive strength of marble industrial powder concrete were studied by orthogonal test method. 25 orthogonal test groups and 1 contrast test group with the mineral admixture content 0% were designed to carry out the flexural and compressive tests. The strength of concrete with different substitution rate and fineness is obtained, and the mechanism of influence on each strength is analyzed. The experimental results show that the concrete flexural strength is reduced by the addition of marble powder, but it can meet the requirement of engineering application when the substitution rate is less than 10%. According to the orthogonal test, the main factor affecting the flexural strength of marble industrial powder concrete is the substitution rate of marble powder, and the secondary factor is the fineness of marble powder. The effect of marble powder on the flexural strength and compressive strength of concrete is basically the same. The ratio of flexural strength to cubic compressive strength of marble powder concrete with different substitution rate and fineness is 0.16.
Molecular Structure Influence of Polycarboxylate Superplasticizer on the pump PHC
Authors: Fang Yunhui , Zhang Xiaofang , Ke Yuliang , Lai Huazhen , Zhong Lina , Li Geli , Lin Yanmei , Lin Tianxing , Guo Yuanqiang , Ma Xiuxing 
Published: October 2020

Abstract
This article disclosed to design a series of polycarboxylate superplasiticizer (PHC) by free radical polymerization. The PEO grafting side chain desity and main chain compositon of PCE greatly influenced the concrete performance. The PEO long side chain of PCE can produces steric hindrance effect in concrete to provide the flowability. The functional monomer DAC and AMPS incorporated into the main chain can improve the compressive strength. The suitable water dosage in the PHC mix proportion is 145 kg/m3 and 150 kg/m3.
Multi-scale Modelling and Wind-induced Vibration Analysis of Transmission Tower Structure
Authors: He Huan , Li Zhengying , Zhang Ke 
Published: October 2020

Abstract
Based on the theory of node displacement compatibility, the multi-point constraint equations of beam-solid elements are derived. The beam element model and multi-scale model are established to analyze the wind-induced vibration response of the transmission tower. The analysis results demonstrate that the dynamic response of the two models is similar in the elastic stage, but the response of the multi-scale model is larger than that of the beam element model in the plastic stage. The main reason is that the multi-scale model can consider the stiffness degradation and cracking of the angle cleat, which will in turn influence the mechanical performance and failure mode of the structure.
Application and Progress of Microstructure and Mechanical properties Control Methods for Ultra-High Strength Steel in Rolling Process
Authors: Chen Yongli , Zhou Xuejiao , Li Yuhua 
Published: October 2020

Abstract
This paper introduces traditional ultra-high steels and the dilemma of its processing, the application of the rolling method in the production of ultra-high strength steel, Nano-fine grain preparation techniques for improvement of strength and toughness, Phase composition regulation to improve mechanical properties. Summed up microstructure and mechanical properties control methods for ultra-high strength steel in the rolling process, Using the methods innovatively solves the flexible rolling process produces 1600 MPa grade ultra-high strength and toughness nano-scale B/M complex phase under the existing equipment conditions of ordinary steel enterprises.
Preparation and Properties of High-Conductive Graphene Nanosheets Reinforced Epoxy Composites
Authors: Zhang Haiyun , Wang Danyong , Liu Juncong , Wei Huazhen , Zhang Jianqin , Liu Fangbiao , Xu Jingli , Liu Aiyun , Wang Ronghui , Jia Huamin , Guo Jianfen , Li Fuqiang , Li Shuhu , Qin Zhenming , Liu Yadong 
Published: October 2020

Abstract
Due to the growing needs of thermal management in modern electronics, epoxy-based composites are increasingly demanded in heat dissipating materials. A simple preparation of composites with high thermalconductivity was developed through the graphenenanosheetshomogeneously dispersed in theepoxy matrix. A high thermal conductivityof 0.4843W/mK ( increased by184% over that of pure epoxy) could be obtained for the compositeswith a filler content of 5wt.%. It was proved that high aspect ratio of GNPs are critical issues of theconstitution of a special interface region between the GNPs and epoxy matrix of the composites.The more than mere additive effect on the through-thickness thermal conductivity suggests synergistic physical interactions between graphenenano sheets leading to further enhancement in the through-thickness thermal conductivity. Thus, the graphene-reinforced composites are promising for usageas an efficient heat spreader for heat dissipation applications.
Performance Analysis of Polypropylene Filament Geotextile Heat-Resisting Asphalt Mixture
Authors: Liu Ying , Du Tianling , Chen Lei 
Published: October 2020

Abstract
To illustrate the damage effect of polypropylene filament geotextile against the thermal shock of hot asphalt mixture, the simulation analysis is carried out with ABAQUS finite element software, and the single filament structure of polypropylene filament geotextiles was observed by electron microscopy from the point of view of physical structure, a conclusion is drawn like this: Thermal shock of hot asphalt mixture higher than melting point of polypropylene filament geotextiles will not damage polypropylene filament geotextiles during paving process, its monofilament structure, with a smooth surface and a tight organization, is one of the reasons for resistance to the impact of hot asphalt mixture.
The Hybrids of Graphene with the Polymer of Porphyrin: Synthesis, Characterization and Their Nonlinear Optical Properties
Authors: Liang Chen , Duan Qian 
Published: October 2020

Abstract
A series of comb-shaped porphyrin polymers were synthesized by RAFT polymerization which modified the graphene via π-π bond to synthesize the polymer composite and made the graphene could better disperse in organic solvents. The reverse saturable absorption (RSA) of the hybrid materials were studied. The π-π bonding between poly-porphyrin (PPor) and graphene was confirmed by UV-Vis and fluorescence spectra. The strong fluorescence quenching in composites suggested the energy transfer between the PPor and graphene. The RSA properties were studied by open aperture Z-scan technique at 532 nm in nanosecond regime. At same transmission intensity, the hybrids showed a better NLO property which compared to the PPor and graphene.
Mechanical Property Evolution Model of Polyimide Film by Far Ultraviolet Irradiation
Authors: Shen Zicai , Xia Yan , Zhao Chunqing , Ding Yigang , Fan Peng , Li Jian 
Published: October 2020

Abstract
The deuterium lamp was used as simulation source to study the Mechanical property of polyimide film in space far ultraviolet environment, thermo gravimetric and XPS was used to analyze the evolution mechanism of polyimide film in different exposures. It was found that the mechanical properties such as tensile strength and rupture elongation of polyimide film decrease firstly and then exponent increase until to stable. From XPS analysis, it can be found that there were rupture and crosslink of chemical bond in polyimide film. In early stage of far ultraviolet radiation, the rupture of C-N, C=O, C-O, C-C bond is for the decrease of mechanical properties of polyimide film, and as the increase of far ultraviolet exposure, the release of N, and formation of C-N bond is for the increase of mechanical properties of polyimide film.
Preparation and Lithium Storage Properties of LiV3O8 as a Cathode Materials
Authors: Li Lin , Liu Qing , Cheng Jinsong , Zhao Rongfei 
Published: October 2020

Abstract
The LiV3O8 cathode materials was successfully synthesized by PEG-assisted freeze drying combination with calcination treatment process. The annealing temperature affected the electrochemical properties of the LiV3O8 cathode materials. The LiV3O8 cathode materials annealed at different temperatures were characterized by X-ray diffraction, Scanning electron microscopy, and Galvanization charge/discharge profile measurement. The results demonstrated that with the increase of sintering temperature, accompanied with the change of the morphology of the nanoparticles to nanorods. The LiV3O8 fabricated at 500 °C (LVO500) showed the high capacity and good rate capability (after 100th, a reversible discharge capacity up to 218 mAh g−1).
Effects of Geometric Parameters and Axial Tension on Vibration Characteristics
Authors: Wang Bohan , Cheng Li , Ding Junliang , Bao Xuechun , Wang Changkai , Li Dongchun 
Published: October 2020

Abstract
The vibration frequency of the aero-engine blade is affected by its own mass characteristics and steady-state centrifugal force, which can be used to adjust the blade resonance frequency to avoid the exciting source and prolong the fatigue life of the blade, and can also be used to approach the exciting source frequency and guide the design of ultrasonic fatigue specimens. Through the combination of mechanical analysis and finite element simulation, the influence mechanism of geometric parameters and axial tension on modal frequency is analyzed from the point of view of vibration and energy, the influence law is obtained, and the optimal design of two kinds of three-point bending specimens is completed. The resonant frequency error calculated by finite element method is controlled within ±5Hz, and the frequency is 20.03 kHz verified by ultrasonic fatigue test, which meets the accuracy requirements, which provides a reliable theoretical support for the design of simulated blade ultrasonic fatigue specimens.
Thermal Stability and Mechanical Property of Vinyl-Functionalized Polyborosiloxane and Silicone Rubber
Authors: Zhang Yulong , Zang Chongguang , Jiao Qingjie 
Published: October 2020

Abstract
In this study, under solvent-free condition, the vinyl-functionalized polyborosiloxane (BSiOVi) was synthesized by reacting triethoxyvinylsilane (VTEOS) and boric acid (BA) and the chemical structures were characterized by GPC and FT-IR. The results indicated that the BSiOVi containg Si-O-B bonds and vinyl groups was successfully synthesized. Moreover, the thermal stability and compressive strength after heat treatment were studied. TG-DTG result indicated that the BSiOVi with more Si-O-B high energy bonds possessed the better thermal stability than that of silicone rubber only possessing Si-O-Si bonds. The results of mechanical property of BSiOVi showed that the BSiOVi after heat treatment possessed the higher compressive strength than that of silicone rubber. This is because that the polymerization of Si-CH=CH2 groups could improve the crosslinking density, and the ceramic transformation of BSiOVi after heat treatment tend to the formation of dense SiBOC nanocomposites. We believed that the BSiOVi could be effectively served high temperature resistant matrix resin for ceramic matrix.
Research on Magnetism and Magnetization Intensity of Magnetic Fluid
Authors: Hao Ruican , Liu Huagang , Feng Zhixin 
Published: October 2020

Abstract
Magnetic fluid is a liquid magnetic material with high magnetization, fluidity and superparamagnetism. The composition and the performance of magnetic fluid in magnetic field were introduced. Magnetic model of magnetic fluid for application was established. Magnetic particles could be seen as magnetic needles with certain N-S directions whose direction could be controlled by external magnetic field. Magnetization mechanism of magnetic fluid was researched. Measurement principle of magnetization intensity was studied and the formulas were deduced. The working principle of vibrating sample magnetometer was introduced and the magnetization curve of magnetic fluid was measured and plotted. It was concluded that magnetic fluid has superparamagnetism which means that the remanence and coercivity of aggregation of magnetic fluid are both zero. Magnetism is an important characteristic of magnetic fluid for engineering applications that magnetic fluid with high magnetization intensity will be explored and researched.