bluuebunny/crossref_metadata_2025 huggingface dataset:
Gestationsdiabetes – Ist ein Screening kosteneffektiv?
Authors: Thiem Helena
Published: November 2019

Fitria N et al. Cost-effectiveness of controlling gestational diabetes mellitus: a systematic review. Eur J Health Econ 2019: 20: 407–417

Als Gestationsdiabetes, auch Schwangerschaftsdiabetes genannt, bezeichnet man eine Glukosetoleranzstörung, die während der Schwangerschaft auftritt und diagnostiziert wird. Festgestellt wird diese Erkrankung durch einen Blutzuckerbelastungstest. Das rechtzeitige Screening auf Hyperglykämie in der Schwangerschaft verbessert die Früherkennung und Kontrolle des Gestationsdiabetes. Fitria et al. untersuchten, inwieweit diese Maßnahme auch kosteneffektiv ist.
α-d-Galacturonic Acid as Natural Ligand for Selective Copper-Catalyzed N-Arylation of N-Containing Heterocycles
Authors: Yuan Chunling , Zhao Yingdai , Zheng Li
Published: November 2019

The first application of α-d-galacturonic acid hydrate (GalA) is reported here, as a potential O-donor ligand. The C–N couplings of N-heterocycles with aryl halides or arylboronic acids could be readily conducted and exhibited good functional group tolerance with characters of selectivity. These N-arylazoles allow rapid access to several pharmaceutical intermediates and can be easily transformed into a variety of other interesting scaffolds as well.
Geminal Difunctionalization of Vinylarenes: Concise Synthesis of 1,3-Dioxolan-4-ones
Authors: Balaji Pandur Venkatesan , Chandrasekaran Srinivasan
Published: November 2019

We report a straightforward method for the synthesis of five-membered 1,3-dioxolan-4-ones by an unprecedented oxidative alkene geminal difunctionalization strategy using α-hydroxy carboxylic acids. Under the geminal oxidative addition conditions, various substituted α-hydroxy carboxylic acids and styrenes containing a variety of substituents, including β-substituted styrenes, were effectively coupled regioselectively (anti-Markovnikov) with an isobutyl-substituted chiral α-hydroxy carboxylic acid, providing an annulation with excellent dia­­stereoselectivity. An aryl migration in the semipinacol rearrangement leading to geminal oxidative addition of the α-hydroxy carboxylic acids was confirmed by deuterium-labelling and control studies.
Efficient Synthesis of 3,4-Disubstituted 7-Azaindoles Employing SEM as a Dual Protecting–Activating Group
Authors: Gyárfás Piroska , Gerencsér János , Wade Warren S. , Ürögdi László , Novák Zoltán , Meyer S. Todd
Published: November 2019

An efficient method for nucleophilic aromatic substitution on 7-azaindoles has been developed. The reaction is facilitated by the unique dual influence of SEM as both protecting and activating group, permitting mild conditions and short reaction times that are compatible with sensitive functional groups. The method is suitable for the synthesis of a broad range of products, most notably ethers.
Gingival Changes in Wistar Rats after Oral Treatment with 4-Nitroquinoline 1-Oxide
Authors: Ribeiro Daniel Araki , Salvadori Daisy Maria Fávero
Published: November 2019

Objectives:4-nitroquinoline 1-oxide (4NQO)-induced rat tongue carcinogenesis is a useful model for studying oral squamous cell carcinoma. However, gingival changes following 4NQO administration via drinking water are absent in the literature. The aim of this study was to investigate gingival changes concomitant to tongue carcinogenesis induced by 4NQO by means of morphological analysis.

Methods:Male Wistar rats were distributed into 3 groups of 10 animals each and treated with 50 ppm 4NQO solution by drinking water for 4, 12 or 20 weeks. Thirty animals were used as negative control.

Results: Regarding tongue mucosa, the primary histopathological change i.e., hyperplasia and dysplasia was evidenced after 12 weeks treatment with 4NQO. At 20 weeks, squamous cell carcinoma was found in the majority of animals. Gingival squamous hyperplasia was induced by 4NQO after 20-weeks of treatment. Dysplastic changes appeared in some animals (two cases) as well.

Conclusions:Taken together, our results support the notion that 4NQO is more effective in rat tongue mucosa than gingival tissue. Probably, this discrepancy depends strongly on route of administration and the susceptibility with respect to animals species. Certainly, such data will contribute when using this experimental test-system for understanding oral cancer pathogenesis. (Eur J Dent 2007;1:152-157)
Patients as Agents in Behavioral Health Research and Service Provision: Recommendations to Support the Learning Health System
Authors: Galvin Hannah K. , Petersen Carolyn , Subbian Vignesh , Solomonides Anthony
Published: November 2019

Authentic inclusion and engagement of behavioral health patients in their care delivery and in the process of scientific discovery are often challenged in the health care system. Consequently, there is a growing need to engage with and better serve the needs of behavioral health patients, particularly by leveraging health information technologies. In this work, we present rationale and strategies for improving patient engagement in this population in research and clinical care. First, we describe the potential for creating meaningful patient–investigator partnerships in behavioral health research to allow for cocreation of knowledge with patients. Second, in the context of behavioral health services, we explore the utility of sharing clinical notes to promote patients' agency in care delivery. Both lines of inquiry are centered in a Learning Health System model for behavioral health, where patients are agents in enhancing the therapeutic alliance and advancing the process of knowledge generation. Recommendations include genuinely democratizing the health care system and biomedical research enterprise through patient-centered information technologies such as patient portals. In research and technology development, we recommend seeking and tailoring behavioral health patients' involvement to their abilities, promoting patient input in data analysis plans, evaluating research and informatics initiatives for patients and clinicians, and sharing success and research findings with patients. In clinical practice, we recommend encouraging patients to read behavioral health notes on portals, engaging in proactive communication regarding note content, assessing outcomes including stress and anxiety in response to note content, and working with technology providers to support note-sharing governance and deployment.
Physical reservoir computing using magnetic skyrmion memristor and spin torque nano-oscillator
Authors: Jiang Wencong , Chen Lina , Zhou Kaiyuan , Li Liyuan , Fu Qingwei , Du Youwei , Liu R. H.
Published: November 2019

Spintronic nanodevices have ultrafast nonlinear dynamic and recurrence behaviors on a nanosecond scale that promises to enable a high-performance spintronic reservoir computing (RC) system. Here, two physical RC systems based on one single magnetic skyrmion memristor (MSM) and 24 spin-torque nano-oscillators (STNOs) are numerically modeled to process image classification task and nonlinear dynamic system prediction, respectively. Based on the nonlinear responses of the MSM and STNO with current pulse stimulation, our results demonstrate that the MSM-based RC system exhibits excellent performance on image classification, while the STNO-based RC system does well in solving the complex unknown nonlinear dynamic problems, e.g., a second-order nonlinear dynamic system and NARMA10. Our result and analysis of the current-dependent nonlinear dynamic properties of the MSM and STNO provide the strategy to optimize the experimental parameters in building the better spintronic-based brainlike devices for machine learning based computing.
Electric polarizations in PVDF-TrFE nanorods under lateral nanoshaping
Authors: Ji Yanda , Jin Rongqiang , Zhang Xiyuan , Bouchilaoun Raouf , Fan Jiyu , Zhao Run , Ou Xin , Luo Wenbo , Yang Hao
Published: November 2019

Horizontal, single-dimensional, trianglelike poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) nanorods are prepared under lateral nanoconfinement induced by faceted m-plane sapphire surfaces. X-ray diffraction reciprocal space mappings reveal that the polymer contains polycrystalline ferroelectric β-phase PVDF. Depolarizing fields induce different polarizations in polymer nanorods along the out-of-plane and in-plane directions. The differences are characterized using vector piezoresponse force microscopy. The depolarizing fields in the lateral PVDF-TrFE nanorods are further discussed in theory. Our results suggest that a nanofaceted m-plane sapphire can be an alternative template to induce the depolarizing fields for future nanosacle devices.
Wide band metamaterial absorber for Ku and K band applications
Authors: Barde Chetan , Choubey Arvind , Sinha Rashmi
Published: November 2019

This paper presents a very compact simple double square shaped design of a Metamaterial Absorber (MA). The dimension of the square is 1.41×1.41mm2, and the overall dimension of the unit cell structure is 5×5mm2. A wideband of absorption is achieved from 14.44 GHz to 27.87 GHz having a bandwidth of 13.43 GHz at −10 dB, which covers the Ku (12 GHz–18 GHz) and K (18 GHz–27 GHz) bands approximately. The proposed structure finds application in the field of radar and satellite communications. The full width half maxima bandwidth achieved is 16.39 GHz (from 13.61 GHz to 30.00 GHz). Three absorption peaks are obtained at 16.54, 20.54, and 25.81 GHz with absorptivity of 99.89%, 99.95%, and 99.96%, respectively. The simulation of the proposed MA is carried out using ANSYS HFSSv19.1, and it is fabricated on FR4 (Flame Retardant) using a printed circuit board. Analysis is done under both normal incident and oblique incident for different angles. The measured and simulated results for absorption are almost very close to each other with little variation due to fabrication tolerances.
Learning epidemic threshold in complex networks by Convolutional Neural Network
Authors: Ni Qi , Kang Jie , Tang Ming , Liu Ying , Zou Yong
Published: November 2019

Deep learning has taken part in the competition since not long ago to learn and identify phase transitions in physical systems such as many-body quantum systems, whose underlying lattice structures are generally regular as they are in Euclidean space. Real networks have complex structural features that play a significant role in dynamics in them, and thus the structural and dynamical information of complex networks cannot be directly learned by existing neural network models. Here, we propose a novel and effective framework to learn the epidemic threshold in complex networks by combining the structural and dynamical information into the learning procedure. Considering the strong performance of learning in Euclidean space, the Convolutional Neural Network (CNN) is used, and, with the help of “confusion scheme,” we can identify precisely the outbreak threshold of epidemic dynamics. To represent the high-dimensional network data set in Euclidean space for CNN, we reduce the dimensionality of a network by using graph representation learning algorithms and discretize the embedded space to convert it into an imagelike structure. We then creatively merge the nodal dynamical states with the structural embedding by multichannel images. In this manner, the proposed model can draw the conclusion from both structural and dynamical information. A large number of simulations show a great performance in both synthetic and empirical network data sets. Our end to end machine learning framework is robust and universally applicable to complex networks with arbitrary size and topology.
Impurity-assisted terahertz photoluminescence in compensated quantum wells
Authors: Makhov I. S. , Panevin V. Yu. , Firsov D. A. , Vorobjev L. E. , Klimko G. V.
Published: November 2019

The terahertz radiation in GaAs/AlGaAs quantum wells with different types of doping was experimentally studied under interband optical excitation of nonequilibrium charge carriers. The structures doped only with donors, and the structures with a high degree of compensation of donors by acceptors were studied. The spectra of terahertz radiation associated with charge carrier transitions with the participation of shallow impurity states were obtained and analyzed. It was shown that the compensation of donors by acceptors leads to a significant increase in the intensity of terahertz photoluminescence. The spectra of near-infrared photoluminescence with the participation of donor and acceptor states were also studied and analyzed.
Nernst thermomagnetic waves in magnetized high energy density plasmas
Authors: Velikovich A. L. , Giuliani J. L. , Zalesak S. T.
Published: November 2019

The Nernst effect plays the dominant role in the subsonic transport of magnetic flux in magnetized high-energy-density (HED) plasmas, where the plasma beta is high and the temperature diffusivity is much greater than the magnetic diffusivity. This parameter range is characteristic of the Magnetized Liner Inertial Fusion and other magnetoinertial fusion approaches near stagnation. It is demonstrated that the transport of magnetic flux in HED plasmas proceeds via the Nernst thermomagnetic waves propagating at the local Nernst velocity with respect to the plasma particles down the temperature gradient. The plasma resistivity strongly damps their propagation in the opposite direction. The Nernst waves, which had been theoretically predicted in the 1960s and observed in metals at cryogenic temperatures, have never been discussed for strongly driven, highly inhomogeneous, magnetized HED plasmas at kilo-electron-volt temperatures. Semianalytical, self-similar solutions are developed for the plasma transport equations at constant pressure involving the Nernst waves. The effect of the Nernst waves on the losses of heat and magnetic flux from magnetically insulated hot plasmas is discussed. The results from finite difference MHD simulations with particular numerical techniques are compared with the self-similar solutions. Finally, the constraint of constant pressure is removed and the simulations show that the self-similar profiles are asymptotically reproduced in a region between outgoing pressure disturbances. The self-similar solutions and finite difference simulations provide a challenging verification test for MHD codes that include the Nernst effect.
A robust actively-tunable perfect sound absorber
Authors: Ao Wei , Ding Jin , Fan Li , Zhang Shu-yi
Published: November 2019

Perfect sound absorption (PSA), producing an absorption coefficient of 1, can be achieved based upon the coherent interaction of acoustic waves, while it can merely be achieved within a narrow frequency-band due to critical impedance matching conditions. Here, we theoretically and experimentally study self-modulation and active-tunability in PSA created on account of a membrane-covered cavity. It is observed that due to the nonlinearity of the membrane, the frequency of PSA increases with the intensities of input acoustic waves, exhibiting a self-modulation property. Furthermore, we design an apparatus to control the elasticity of the membrane via four electromagnets, and thus, the PSA frequency can be freely and effectively adjusted by changing the direct-current driving voltage of the electromagnets. Despite the critical impedance matching conditions, the absorption coefficient achieved in our system holds at 1 when the PSA frequency is freely changed, which exhibits strong robustness in active-tunability.
Nonlinear characteristics of relativistic Pierce diodes in stationary state
Authors: Pramanik Sourav , Ghosh Samiran
Published: November 2019

Time independent states are explored theoretically for generalized Pierce diode (non-neutral plasma diode with ionic background), which is driven by a cold relativistic electron beam. The region between the electrodes is assumed to be filled uniformly with static ions. Injected beam is monochromatic, i.e., all the electrons are emitted with the same kinetic energy (relativistic). Relativistic effects are explored both for collisionless and collisional systems. The formulation of the model is based on the fluid-Maxwell's equations and it is solved by two methods: in the absence of any dissipative source, Eulerian description is employed, whereas to incorporate the effects of collisional drag Lagrangian formulation is found to be useful. The steady-state solutions are visualized through the “Bursian” and “Non-Bursian” branches in a parametric plane. It is observed that the magnitude of the maximum current density of a Pierce diode increases with the relativistic factor of the injected beam. Other factors like the density of background ions and particle collision also have significant influence on the space-charge-limited flow and other steady state properties. Obtained results are relevant to comprehend the working mechanism of many diode-based instruments such as thermionic energy converters, microwave emitter, Q-machines, etc.
Preliminary results of BETSI test bench upgrade at CEA-Saclay
Authors: Tuske O. , Delferrière O. , Gauthier Y. , Harrault F. , Sauce Y.
Published: November 2019

The Banc d’Etude et de Tests des Sources d’Ions (BETSI) test bench was built in 2009 for the Spiral2 project. Year after year, upgrades were done on the low energy beam line in order to have a complete injector equipped with 2 solenoids and vacuum chambers with multiple viewports for various kinds of beam-diagnostics. BETSI was designed for a 50 kV high voltage, and all the sources that were installed on the platform were also designed for that voltage. As the advanced light ion source extraction system ions source family is getting larger, the design is made for higher extraction voltages. As the common extraction voltage is 100 kV, the BETSI platform was upgraded to this voltage value. The control-command was upgraded, and at this voltage, a great care on the electromagnetic protections was taken in order to protect the equipment when spark occurs. This paper describes the choice of the upgrade, its installation, and some performances already obtained with a permanent magnet ion source equipped with a large accelerating tube.
Effect of vacancies on thermoelectric properties of β-CuAgSe studied by positron annihilation
Authors: Gu B. C. , Li Z. , Liu J. D. , Zhang H. J. , Ye B. J.
Published: November 2019

CuAgSe is a promising thermoelectric material due to its superionicity. In this work, β-Cu1−xAg1−ySe (x = 0, 0.02, and 0.04; y = 0, 0.02, and 0.04) samples are synthesized by solid-state reaction method. The vacancies in samples are characterized by positron annihilation spectroscopy. Thereafter, the effects of vacancies on thermoelectric properties are investigated. The positron annihilation results reveal that Ag vacancies exist in the Ag-deficient samples (β-CuAg0.98Se and β-Cu0.98Ag0.98Se) but also in the Cu-deficient samples (β-Cu0.96AgSe and β-Cu0.98AgSe). For the Cu-deficient samples, the existence of Ag vacancies is attributed to the formation of impurity phases. For the nonstoichiometric samples, the vacancies are responsible for the decrease in the Seebeck coefficient in the temperature range from 300 to 400 K. However, for β-CuAgSe, no decrease in the Seebeck coefficient is observed due to the lack of extra holes, and electrons are still the majority carriers. For CuAgSe, the ZT value is mainly determined by the Seebeck coefficient. Therefore, for the nonstoichiometric samples, the ZT value reduces drastically with increasing temperature and drops to nearly zero at 400 K. In contrast, with the temperature increasing from 300 to 450 K, the ZT value of β-CuAgSe goes up from 0.4 to 0.5.
Photoselective MLCT to d-d pathways for light-induced excited spin state trapping
Authors: Zerdane S. , Cammarata M. , Iasco O. , Boillot M.-L. , Collet E.
Published: November 2019

We use femtosecond optical pump-probe spectroscopy to study the Light Induced Excited Spin State Trapping (LIESST) dynamics in an FeII spin-crossover material. In these systems, LIESST derives from fast molecular switching induced by light from low (LS, S = 0) to high spin (HS, S = 2) states, as reported for molecules in solution as well as in the solid state. Since the direct LS-to-HS conversion is forbidden by selection rules, the switching dynamics involves intermediate electronic states such as metal-to-ligand charge transfer (MLCT) or ligand-field excited states of singlet or triplet nature. In addition, the HS state is structurally trapped by the elongation of the metal-ligand bond, which is accompanied by the coherent activation and damping of the molecular breathing mode. The ultrafast LIESST dynamics was mainly investigated in FeN6 ligand field systems with almost octahedral symmetry, under MLCT excitation. Our recent study on the FeII(pap-5NO2)2 spin-crossover material, with a FeIIN4O2 ligand field of C2 symmetry, has shown that in addition to MLCT bands, optical excitation, through quite intense and low-energy shifted d-d bands, can also drive LIESST. Compared to MLCT, d-d excitation involves shorter-lived intermediates, drives faster LS-to-HS switching, and enhances the coherent structural dynamics. In this paper, we present an ultrafast study of the pump wavelength dependence of LIESST and we evidence a photoselective crossover from the MLCT to the d-d pathways.
Quartz tuning forks can be used as sub-kelvin thermometers in high magnetic fields
Authors: Bandari Anashe
Published: November 2019

The determination of low temperatures in high fields is a difficult task. The resonances of quartz tuning forks are a promising solution.
The Effects of Lipidation on a TAT-Containing Peptide-Based Inhibitor of PSD-95
Authors: Fernandes Eduardo F. A. , Haugaard-Kedström Linda M. , Strømgaard Kristian
Published: November 2019

Stability and cell permeability are critical parameters in the development of peptide therapeutics. Conjugation to fatty acids and cell-penetrating peptides, such as TAT (YGRKKRRQRRR), are established strategies to increase peptide stability and permeation, respectively. Here, we prepared lipidated analogues of a potent TAT-containing dimeric peptide-based inhibitor of the intracellular scaffolding protein PSD-95, an emerging drug target in ischaemic stroke. Lipidation increased peptide stability in vitro and in vivo. Combining both lipidation and conjugation to TAT improved brain/plasma ratios, but caused acute toxic effects due to the potent haemolytic activity of the TAT-lipid moiety.
Four newly recorded species of the calcified marine brown macroalgal genus Padina (Dictyotales, Phaeophyceae) for Australia
Authors: Ni-Ni-Win  , Sun Zhong-Min , Hanyuda Takeaki , Kurihara Akira , Millar Alan J. K. , Gurgel Carlos Frederico D. , Kawai Hiroshi
Published: November 2019

Molecular phylogenetic analyses based on plastid-encoded rbcL and mitochondrial cox3 gene sequences, in combination with morphological observations, revealed the existence of the following four bistratose Padina species previously unreported from Australian coasts: Padina calcarea Ni-Ni-Win, S.G.A.Draisma, W.F.Prud'homme van Reine & H.Kawai, characterised by its bright yellow–orange inferior thallus surface and chalky white, heavily calcified superior surface, and the presence of hairlines only on the inferior surface; P. macrophylla Ni-Ni-Win, M.Uchimura & H.Kawai, characterised by a moderately calcified thallus with broad, depressed hairlines on the inferior surface and narrow, not depressed hairlines on the superior surface, those hairlines that are largely spaced on each surface; P. moffittiana I.A.Abbott & Huisman, characterised by lightly calcified thalli with narrow, slightly depressed hairlines that are distributed in alternate sequence between the two surfaces at unequal distances, and broad reproductive sori in one or two rows in the fertile zone; and P. okinawaensis Ni-Ni-Win, S.Arai, M.Uchimura & H.Kawai, characterised by heavily calcified thalli, except at the hairlines, which form an alternation of uncalcified furrows and calcified glabrous zones on the inferior surface. With the addition of these four species, 13 Padina species are known from Australia.
Corrigendum to: Lamprothamnium in Australia (Characeae, Charophyceae)
Authors: Casanova Michelle T.
Published: November 2019

Charophytes in the genus Lamprothamnium exhibit a large amount of diversity, particularly in the examples from Australia, although little of that variation has been recognised at species level in the past. The Australian members of the genus are revised here on the basis of extensive new collections, examination of specimens in herbaria and comprehensive review of the literature and available type material. The existing species Lamprothamnium macropogon (A.Braun) Ophel, L. inflatum (Fil. & G.O.Allen ex Fil.) A.García & Karol and L. heraldii A.García & Casanova are retained, eight new species are described (L. australicum Casanova, L. beilbyae Casanova, L. capitatum Casanova, L. compactum Casanova, L. coorongense Casanova, L. diminutum Casanova, L. macroanthum Casanova and L. stipitatum Casanova) and two taxa variously treated at infraspecific rank in Lychnothamnus are transferred to Lamprothamnium at species rank (L. cockajemmyense Casanova, L. tasmanicum (A.Braun) Casanova). Neither L. papulosum (Wallr.) J.Groves nor L. succinctum (A.Braun) R.D.Wood are confirmed for Australia after examination of the type material of these species. Species are distinguished by the arrangement of the gametangia, morphology of the fertile whorls and characteristics of the oospores. Four of these species are dioecious and nine are monoecious, which supports published conjectures concerning the biogeography of charophyte species (Proctor (1980): J. Phycol. 16, 218–233, doi:10.1111/j.1529-8817.1980.tb03023.x).
Instagram narratives in Trump’s America
Authors: Dobkiewicz Patryk
Published: November 2019

This study investigates the ideological composition of Donald Trump’s 2016 presidential campaign on Instagram, a
popular but little researched platform, and attempts to situate it within his broader campaign. To account for the multimodality
of Instagram posts, an analytical framework combining methods of the discourse-historical approach and visual grammar is proposed.
330 posts were subjected to a semantic analysis, resulting in a network of discourse topics which defined the Instagram campaign.
Trump’s Instagram posts, in contrast to his tweets, are shown to be mostly positive, refraining from nativist attacks on
minorities and limiting personal attacks on Hillary Clinton. Trump methodically constructed the positive, populist ‘Man of the
People’ image, although in-depth analysis of selected posts reveals his populism to be only superficially inclusive. These
findings prompt a reflection on the existence of an internal cordon sanitaire in social media campaigns, a
possibly detrimental phenomenon for right-wing populists.
Arc deposited AlSi12 cladding layer on steel plate without zinc coating
Authors: Chen Chen , Zhao Jingyu , Zhou Jian , Xue Feng
Published: November 2019

AlSi12 cladding layer was fabricated on steel plate without zinc coating via cold metal transfer arc deposited technique. The wettability, morphologies, microstructures, and mechanical properties of the cladding layer were investigated. The cladding layer exhibited favourable wettability with steel plate. Large swing amplitude and high swing frequency were the key factors to achieve excellent wettability. The cladding layer was composed of primary Al dendrites and (Al +  Si ) eutectic structure, and the microstructures were refined. Continuous and thin intermetallic compound layer appeared at AlSi12/steel interface, and reliable bonding strength between the cladding layer and steel plate was achieved. The fracture surface exhibited both brittle fracture and ductile fracture.
Cryptotanshinone attenuates allergic airway inflammation through negative regulation of NF-κB and p38 MAPK
Authors: Li Junfeng , Zheng Mingyu , Wang Chongyang , Jiang Jingzhi , Xu Chang , Li Li , Li Liangchang , Yan Guanghai , Jin Yongde
Published: November 2019

This study is to determine the role and mechanism of cryptotanshinone (CTS) in allergic airway inflammation. Asthma induced by OVA was established in BALB/c mice. We found increased airway hyperresponsiveness (AHR), increased inflammatory cell infiltration, elevated levels of TNF-α, interleukin-1β (IL-1β), IL-4, IL-5, IL-6 and IL-13, decreased interferon gamma (IFN-γ) in lung tissue, increased content of total immunoglobulin E (IgE), OVA specific IgE, Eotaxin, ICAM-1, VCAM-1, nuclear factor-kappaB (NF-κB) and phosphorylation of p38 MAPK in lung tissue. However, the administration of CTS significantly decreased AHR in asthmatic mice, reduced inflammation around the bronchioles and inflammatory cells around airway, regulated cytokine production, reduced the total IgE and OVA-specific IgE levels, and inhibited NF-κB activation and p38 MAPK phosphorylation. In vitro experiments in 16 HBE cells revealed that CTS attenuated CAM-1 and IL-6 expression. These results indicate that CTS alleviates allergic airway inflammation by modulating p38 MAPK phosphorylation and NF-κB activation.
Time-resolved optical emission spectroscopy of a unipolar and a bipolar pulsed magnetron sputtering discharge in an argon/oxygen gas mixture with a cobalt target
Authors: Hippler R , Cada M , Stranak V , Hubicka Z
Published: November 2019

Reactive high power impulse magnetron sputtering (HiPIMS) of a cobalt cathode in pure argon gas and with different oxygen admixtures was investigated by time-resolved optical emission spectroscopy (OES) and time-integrated energy-resolved mass spectrometry. The HiPIMS discharge was operated with a bipolar pulsed power supply capable of providing a large negative voltage with a typical pulse width of 100 μs followed by a long positive pulse with a pulse width of about 350 μs. The HiPIMS plasma in pure argon is dominated by Co+ ions. With the addition of oxygen, O+ ions become the second most prominent positive ion species. OES reveals the presence of Ar I, Co I, O I, and Ar II emission lines. The transition from an Ar+ to a Co+ ion sputtering discharge is inferred from time-resolved OES. The enhanced intensity of excited Ar+* ions is explained by simultaneous excitation and ionisation induced by energetic secondary electrons from the cathode. The intensity of violet Ar I lines is drastically reduced during HiPIMS. Intensity of near-infrared Ar I lines resumes during the positive pulse indicating an additional heating mechanism.
Observation of deuterium molecule emission spectra under an active feedback control of H-mod plasma divertor detachment experiment on the EAST tokamak*
Authors: Gao Wei , Huang Juan , Xu Jichan , Wang Liang , Zhang Jing , Su Jianxun , Chen Yingjie , Gao Wei , Wu Zhenwei
Published: November 2019

Based on neon gas puffing, an active feedback control of H-mod plasma divertor detachment experiment was successfully operated on the EAST tokamak. During the feedback control discharge, the plasma was detached by puffing neon gas and the strike point splitting phenomenon on divertor target was also clearly observed by divertor probes diagnostic. In boundary region, many neutral particle processes (atom and molecule) were happened and accompanied by their emission spectra under the detachment discharge. By studying these emission spectra, it is helpful for us to understand the role of atoms and molecules in boundary recycling, which is important for studying the physical mechanism of divertor detachment. For the Fulcher-α system (

d
(
3
p
)

3

Π
u
±

→

a
(
2
s
)

3

Σ
g
+

)

, D2 emission spectra in the range from 601 nm to 606 nm were observed, identified and fitted in the detachment experiment for the first time on the EAST, and the spectra in the Q(0–0) band (

d
3

Π
u
−

→

a
(
2
s
)

3

Σ
g
+

)

in the Q branch of the Fulcher-α system were used for detailed analysis to acquire the boundary region temperature T
e (below 5 eV), which could not be provided very well by other diagnostics on the EAST. An electronic version deuterium molecular spectral line database was established to identify the spectral lines and a multi-peak fitting program was developed to fit and analyze the observed spectra.
Generalized Hardy-type tests for hierarchy of multipartite non-locality*
Authors: Yang Fei , Yuan Yu , Lin Wen-Lu , Liao Shu-Ao , Zhang Cheng-Jie , Chen Qing
Published: November 2019

We propose a family of Hardy-type tests for an arbitrary n-partite system, which can detect different degrees of non-locality ranging from standard to genuine multipartite non-locality. For any non-signaling m-local hidden variable model, the corresponding tests fail, whereas a pass of this type of test indicates that this state is m non-local. We show that any entangled generalized GHZ state exhibits Hardy’s non-locality for each rank of multipartite non-locality. Furthermore, for the detection of m non-localities, a family of Bell-type inequalities based on our test is constructed. Numerical results show that it is more efficient than the inequalities proposed in [Phys. Rev. A
94 022110 (2016)].
Study on Low-Voltage Distribution Fault Isolation Technology Under Big Data Analysis
Authors: Wei Ren
Published: November 2019

In order to effectively solve the problem of low voltage power distribution fault, large data analysis technology of low-voltage distribution fault isolation technology research, first of all, combined with clustering analysis method for common type of low voltage power distribution fault judgment, and for different fault types characteristics of power distribution fault isolation algorithm, the parameters evaluated targeted fault maintenance, thus effectively completed in low-voltage distribution under the condition of big data analysis research of fault isolation technology. Finally, the experimental results show that this technique is more practical than the traditional fault isolation technique.
Research on High Frequency Signal Transmission Method of Transmission Line under Internet of Things Communication Environment
Authors: Shaokang Zhao , Tao Zheng , Chenglong Liu , Xin Lu , Ying He
Published: November 2019

In order to better promote the safety and stability of transmission line signal transmission, a research on transmission line high frequency signal transmission method based on Internet of Things communication environment is proposed. Firstly, the noise interference in the transmission line signal transmission process is removed by combining the wavelet transform algorithm, and the original high-frequency signal is subjected to waveform constraint processing after denoising, so as to realize the safe transmission of the high-frequency signal of the electric line. Finally, the experiment proves that the transmission line high-frequency signal transmission method under the Internet of Things communication environment has higher safety and stability than the traditional method, which fully meets the research requirements.
A Novel Square Root Algorithm and its FPGA Simulation
Authors: Zhou Zhongcheng , Hu Jingchun
Published: November 2019

As a basic operation in elementary mathematics, square root operation is widely used in numerical calculation and digital signal processing. The square root operation is a nonlinear operation and cannot be solved directly on FPGA. Many previous square root algorithms have been proposed. This paper introduces several previous square root algorithms, then presents a novel square root algorithm which uses 16-bit integer input and 16-bit integer output. Using the idea of normalization, the square number is mapped to the range of 0-1, and the square root is approximated by the sum of numerical sequence. We discuss the proposed square root algorithm, error analysis. The proposed algorithm was programmed by the Verilog in Xilinx’s Vivado 17.2 software environment, and the simulation was verified on the Virtex-7 series chip. Compared with other square root algorithms, the algorithm only uses shifter, adders and sub-tractor. It does not involve complex operations, consumes less resources, and it’s suitable for implementation on FPGA.
Research on Crew On-board Electronic Classroom
Authors: Liu Xiaobai , Liang Hong , Zhang Xingxing
Published: November 2019

A concept of on-board electronic classroom of surface warship was proposed based on the foreign Navy experience in this paper. The main function and system composition of the classroom was planned, which aimed at teaching on-board, educational administration management, remote support and simulation training, including on-borad part and shore auxiliary system. And taking IETM as the information carrier form of the classroom was also put forward in this paper. At the same time, a case design of on-board electronic classroom of Chinese Navy surface warship has been carried out, including system configuration suggestion, using scheme and cabin layout proposal. And that provided a new idea for improving the crew on-borad training level of Chinese Navy warships.
GNSS SDR Signal Generator Implementation Based on USRP N210
Authors: Hu Yaqi
Published: November 2019

With the rapid spread of transport systems, testing the performance of GPS signal receivers in transport systems has become a significant research topic, which requires a variety of specific GPS signals for testing. The paper focuses on the implementation of a Global Navigation Satellite System (GNSS) software-defined radio (SDR) signal generator, which is based on the USRP N210 hardware device and supporting code. Through this GNSS signal simulator, two functions are realized: first, for different signal test requirements, different GNSS signal data definition files are generated by software-defined GPS signal simulator; second, the signal data files can load to the radio front end (USRP N210) which can generate physical signals at the correct frequency. Also, the simulation tests reflect the signals created by this GNSS SDR signal generator can stably maintain on different satellite channels.
The research on Power Supply Array Intelligent Management Technology for Spacecraft Thermal Test
Authors: ZeYuan Liu , Yao Feng , Lin Zhu , JiaBin Liu , Jing Wen
Published: November 2019

The thermal test of spacecraft has a large demand for the program-controlled power supply, which was configured as array. In this paper, the intelligent management technology of program-controlled power supply is researched. Base on the analysis of the history fault type of power supply, the fault detection technology of power supply is studied. Then, combined with the technology of power supply redundancy switching, an on-line switching device is designed. Through the verification experimental, the experimental results show that the system can quickly realize the detection and positioning of the fault power supply, and can finish the online switching of the fault power supply to the backup power within the second-level time. The research of intelligent management technology enhances the management efficiency of the large scale power supply array, and improves the operational reliability of the spacecraft thermal test.
Coordinated control strategy of DC microgrid for hydrogen production load
Authors: Guo Yingjun , Deng Fanyi , Shi Zhe , Sun Hexu
Published: November 2019

In order to solve the problem of wind abandonment and light abandonment in DC microgrid, adding hydrogen production equipment in DC microgrid can effectively alleviate this problem. In the DC microgrid for hydrogen production load, a hierarchical control strategy of DC bus voltage is proposed based on the consideration of charging state, aiming at the fluctuation of DC bus voltage. The operation of the system is divided into seven modes, each of which adopts different control strategies. Finally, a model is built on the PSCAD/EMTDC simulation software and the experimental platform of new energy generation. The simulation and experimental results verify the effectiveness and feasibility of the proposed control strategy.
Application of residual self-fitting ensemble neural network based on LSTM in short-term power load forecasting
Authors: Zhang Baowen , Lao Dejia , Sun Longxiang
Published: November 2019

Accurate load forecasting helps to improve the safety and stability of power systems. LSTM neural networks based on deep learning has lower predicted error than traditional machine learning and time series models. After calculating the residuals of the predicted values and observed values of the LSTM and traditional machine learning model, it can be found that the distribution of residuals also possessed with the regularity of time series data. Therefore, the residual time series can be fitted by another model based on this regularity. To avoid the limitations of a single model, a variety of neural network models have been used to compose ensemble model. In this model, the residual can be generated and fitted by itself. In other words, it implements self-fitting. After analysing the residual distribution and the ensemble method of predictive model, this paper presents a new ensemble neural network model used for short-term power load forecasting. After the experiment, it’s obvious that the predicted results of the new ensemble neural networks is more accurate than single LSTM.
Stability Analysis and Experimental Study of Portable Missile Control Device Test
Authors: Wang Zhuo , Wu Shen-Peng , Wang Tao , Zhang Bo
Published: November 2019

According to the stability requirement of the missile launcher in operating the portable missile launching control device, a structure is designed. Firstly, the structural mechanics theory method is used to analyse the deflection of the outrigger. The force bending of the sector plate is analysed and the bending displacement of the rigid frame after the column is simplified is analysed. Then the main structure of the portable missile launching device is given and the stability of the outrigger, base and column system is analysed and simulated by ANSYS and ADAMS simulation software respectively. Finally, the stability of the equipment was tested to verify the calculation and analysis of the stability of the device. The feasibility and rationality of the design of the portable missile launching device was confirmed.
Research on Harmonic Detection System Based on Wavelet Packet Transform
Authors: Yang Can , Ban Lan
Published: November 2019

This paper introduces the basic concepts of harmonics in power system, and expounds the basic principles of harmonic detection algorithms such as Fourier transform, short wavelet transform and wavelet packet transform. The effectiveness of the proposed algorithm is verified by simulation, which shows that the improved wavelet packet algorithm can achieve the uniform division of the harmonic signal frequency band, and improve the detection accuracy of the harmonic signal. Wavelet packet transform could detect the fundamental and harmonic components of the original signal, which is most suitable for the detection of harmonic signals.
Parameters Sensitivity Analysis of Lithium Batteries Composite Equivalent Model for SOC Estimation
Authors: Duan Cai Zhi , Yun Xu Jing , Yue Sun Xiao , Di Quan Li
Published: November 2019

For the lithium battery electrochemical composite equivalent model, the sensitivity of model parameters to the battery state of charge (SOC) estimation is analysed in order to determine the influence of model parameters on SOC estimation and provide optimization basis for SOC estimation algorithm based on battery model. Firstly, the sensitivity analysis method of model parameters is defined, and the sensitivity of model parameters to SOC estimation of lithium ion batteries is quantitatively analysed based on MATLAB software. Then, based on MATLAB /Simulink, the extended Kalman filter algorithm is used to simulate the SOC estimation under variable model parameters and analyse the influence of parameter changes on the SOC value. The experimental results show the correctness and validity of the quantitative analysis results of parameter sensitivity, and provide the corresponding basis for the research of SOC estimation algorithm of lithium-ion battery variable parameter model.
Research on the Directionality of Difference Frequency Sound Field Based on Circular Ultrasonic Array
Authors: Zhao Qing , Zheng Wei , Li Jialing
Published: November 2019

In a closed environment of underground space, noise pollution is serious, and sound waves are required to have strong directionality, providing people with a relatively independent and quiet working space. In order to obtain a high directivity sound source, a method combining difference frequency sound field with the circular array of transducers is proposed. Firstly, the advantage and disadvantage of the sound field generated by difference frequency mode and the sound field radiated by direct vibration in conventional mode are demonstrated. Secondly, based on the principle of sound field radiation, the directivity function of differential frequency sound field of circular piston transducer with multi-circumference arrays is derived. Finally, the influence parameters of directivity of differential frequency sound field are determined by three-dimensional and two-dimensional directivity diagrams, which can provide reference for the design of acoustic directional transducer array.
Intelligent Grounding Current Monitoring System for Iron Core of Power Transforme
Authors: Wei Wang , Qingsong Luo , Zhen Tang
Published: November 2019

In the process of stable operation of power transformer, one-point grounding of iron core should be ensured. When two or more points of grounding occur, it will cause transformer operation failure, even burning iron core, affecting the safe operation of the power grid. At present, the monitoring of transformer grounding point mostly adopts the current transformer monitoring mode, only after uploading the detection data to the server, the comparison prompts that manual intervention is needed in the later stage, which increases the processing time and increases the risk of power grid problems. From the point of view of intelligent monitoring, this paper designs an intelligent transformer core grounding monitoring system. When the fault of multi-point grounding is detected, the resistance value of current limiting resistance is calculated immediately according to the magnitude of current, and the series resistance is introduced to limit the current of grounding circuit. At the same time, the fault alarm is given, indicating that manual intervention greatly reduces the occurrence of transformer faults. The processing time reduces the probability of deterioration in case of failure and improves the stability of transformer operation.
A brief analysis of the power cable planning and design of the utility tunnel
Authors: Yao Yan , Wang Jian , Xu Jiayu , Hu Yulong , Ren Jiaorong , Pei Chuanxun , Wang Wei , Xiao Kaichao
Published: November 2019

The urban utility tunnel plays an important role in improving the utilization efficiency of urban underground space. With the vigorous promotion of the construction of urban utility tunnel, the scale of power cable into urban utility tunnel is also increasing rapidly. There are some problems in the planning and design process of utility tunnel, such as the lack of technical specifications or the inconsistency of existing standards and norms. Thus, some detailed design requirements of the overall design, section design and ancillary system design of the power pipeline are proposed in this paper, especially the details of the power cables entering into the utility tunnel are discussed in detail, providing a reference for other engineering. It would be helpful for the electric power cables entering into the utility tunnel in the future.