mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Leakage detection of oil tank using terahertz spectroscopy

The necessity for safety in oil-gas storage and transportation has led to increasing technical requirements for on-line monitoring of damaged pores and oil leakage from tanks. In this study, the severity of damage of the oil tank at the micron level was detected by terahertz time-domain spectroscopy (THz-TDS), which is of great significance for the early detection and prevention of oil leakage. The THz amplitude (EP) was related to the severity of damaged according to the THz-TDS measurement of oil tanks with various degrees of damage, including intact, partially damaged, completely damaged, and seriously damaged points. Absorption and scattering effects co-occurred when the THz wave penetrated the tanks, with the collective tendencies being used to expressly monitor oil leakage from tanks. When the oil tank was damaged to form micron-level pores and the crude oil had not overflowed, the pore size was close to THz wavelength and the Mie scattering effect was obvious. After further destruction of the pores, the crude oil gradually spilled over and the scattering effect was gradually transformed from Mie scattering to Rayleigh scattering. In addition, the polar molecules in crude oil have strong resonance under the irradiation of THz wave, and the THz wave has strong attenuation. Eventually, surface tension of the oil flattens the surface of the tank, the scattering effect is gradually suppressed and replaced by the absorption effect. Absorption and scattering caused by THz waves passing through tanks coexist and have competing relationships. The change rule of EP can successfully prove the phenomenon and can be considered as an important alternative for application to predict the degree of tank damage. Therefore, in this study, the detection of pores as small as micrometers on the oil tank was expected to greatly prevent oil leakage accidents and improve the safety of oil and gas storage and transportation.
Coil-levitated hybrid generator for mechanical energy harvesting and wireless temperature and vibration monitoring

The development of wireless monitoring is currently restricted by the short lifetime of batteries, requiring frequent replacement. Utilization of abundant mechanical energy from the surrounding environment has attracted increasing attention in real-time monitoring. Herein, a coil-levitated hybrid generator was developed for the efficient harvesting of mechanical energy from mechanical motion. The novel coil-levitated structure adapted to the metal and magnetic environment. The output currents were systematically analyzed at different operation modes based on the unique combination of triboelectrification, electromagnetic induction, and piezoelectric effect. Under the excitation of vibration frequency and amplitude of 8 Hz and 5 mm respectively, the as-constructed triboelectric nanogenerator delivered a peak power density of 11.40 W/m~3 at 10 MΩ. Meanwhile, the middle electromagnetic part and bottom piezoelectric generator provided peak power densities of 6.97 and 79.93 W/m~2 at 10000 Ω, respectively. More importantly, the battery charging experiment was verified, in which a 30 mA h Li-ion battery can be charged from 2.57 to 3.27 V in about 90 min. In sum, a self-powered temperature and vibration monitoring system was successfully developed based on hybrid generator, promising for realizing wireless monitoring of mechanical equipment without any external power supply.
Numerical investigation on failure behavior of steel plate under explosive loading

The failure behavior of metal materials under strong dynamic loading such as explosive and impact loading has important applications in the fields of defense industry and civil security. In this study, a novel coupled bidirectional weighted mapping method between Lagrange particles and Euler meshes is proposed to numerically simulate the dynamic response and failure process of steel structure under explosive loading. In this method, the Lagrange particles and Euler meshes are used to describe the materials that need to be accurately tracked and can more accurately characterize the deformation history and failure process of the material. A comparison between the numerical results and experimental data shows that this method can be used to solve large deformation problem of multi-medium materials and the failure problems of complex structures under strong impact loading.
An iterative learning method for realizing accurate dynamic feedforward control of an industrial hybrid robot

Feedforward control based on an accurate dynamic model is an effective approach to reduce the dynamic effect of the robot and improve its performance. However, due to the complicated work environment with considerable uncertainty, it is difficult to obtain a high-precision dynamic model of the robot, which severely deteriorates the achievable control performance. This paper proposes an iterative learning method to accurately design the industrial feedforward controller and compensate for the external uncertain dynamic load of the robot. Based on a standard dynamic model, a complete linear feedforward controller is presented. An iterative design strategy is given to iteratively update the feedforward controller by combining the Moore-Penrose Inverse and the PID learning rate. Experiments are carried out on a 5-DOF industrial hybrid robot to validate the effectiveness of the proposed iterative learning method. The experiment results illustrate that the industrial feedforward controller can rapidly converge to the optimal controller and significantly improve the servo performance by using the proposed method. This paper provides an effective method for applying iterative learning control to an unopened industrial control system. It is very useful for the practical control of hybrid robots in industrial field.
Slip rate of the seismogenic fault of the 2021 Maduo earthquake in western China inferred from GPS observations

Seismic and field observations indicate that the Mw7.4 Maduo earthquake ruptured the Jiangcuo fault, which is a secondary fault ~85 km south of the northern boundary of the Bayan Hor block in western China. The kinematic characteristics of the Jiangcuo fault can shed lights on the seismogenic mechanism of this earthquake. Slip rate is one of the key parameters to describe the kinematic features of a fault, which can also provide quantitative evidences for regional seismic hazard assessments. However, due to lack of effective observations, the slip rate of the Jiangcuo fault has not been studied quantitatively. In this study, we consider the interaction between the Jiangcuo fault and the eastern Kunlun fault, and estimate the slip rates of the two faults using the interseismic GPS observations across the seismogenic region. The inferred results show that the slip rates of the Jiangcuo fault and the Tuosuo Lake segment of the Kunlun fault are 1.2±0.8 and 5.4±0.3 mm a~(–1), respectively. Combining the slip rate with the average slip inferred from the coseismic slip model, the earthquake recurrence interval of the Jiangcuo fault is estimated to be 1800 700 +3700 years (1100–5500 years). Based on the results derived from previous studies, as well as calculations in this study, we infer that the slip rate of the Kunlun fault may decrease gradually from the Tuosuo Lake segment to the eastern tip. The Jiangcuo fault and its adjacent parallel secondary faults may have absorbed the relative motion of blocks together with the Kunlun fault.
The optical and molecular signatures of DOM under the eutrophication status in a shallow, semi-enclosed coastal bay in southeast China

We applied stable carbon isotopes, ultraviolet-visible absorption (UV-Vis), fluorescence excitation-emission matrices spectroscopy (EEMs), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to investigate the chemical composition and sources of the dissolved organic matter (DOM) in both the water column and pore water in Xiangshan Bay, a representative semi-enclosed and eutrophic bay in Zhejiang Province, China. One protein-like fluorescent component (C1) and two humic-like fluorescent components (C2 and C3) were identified by PARAFAC modeling. The concentration of dissolved organic carbon (DOC), the relative intensities of C2, C3, and black carbon-like compounds are all negatively correlated with salinity, indicating that there is a dilution effect of terrestrial signals by seawater in Xiangshan Bay. The differences in light penetration ability of Xiangshan Bay cause different degrees of photo-degradation, which may play an important role in the transformation of organic matter in Xiangshan Bay. The weak correlation between the C1 fluorescent component and salinity indicates that autochthonous sources cannot dominate the protein-like FDOM in the Xiangshan Bay drainage area. Multiple sources (such as anthropogenic inputs and release of pore water) also affect the distribution of the protein-like fluorescent component under eutrophication conditions. The relative proportion of the protein-like fluorescent component in Xiangshan Bay is on a medium level in China and anthropogenic inputs may be a significant source of DOM in coastal bays.
Multi-proxy evidence of environmental change related to collapse of the Liangzhu Culture in the Yangtze Delta, China

The Liangzhu Culture (5300–4300 cal. a BP) has been regarded as the culmination of the Neolithic Age in the Yangtze Delta and as an archaic state. However, the reason behind the collapse of the Liangzhu Culture remains controversial. Some scholars attributed it to social conflicts or foreign invasions, while others suggested that environmental deterioration, such as cold episodes, inundation and palaeo-typhoon events, disrupted the civilization. Notably, the yellowish silty sediments widely overlying the Liangzhu group sites have been presumed to be one of the vital clues to resolving these issues. The process and cause of their formation are key to understanding the decline in the Liangzhu Culture. In this study, two typical profiles composed of the Liangzhu cultural layer and yellowish silty sediments were collected in Liangzhu Ancient City. Multiple proxies, including pollen, phytoliths and diatoms, along with radiocarbon and optically stimulated luminescence dating and synthesized geochemical evidence from different sediments, were applied to reconstruct ecological and hydrological changes and discuss their linkage to cultural collapse. The regional ecology was typical freshwater wetlands during 4800–4400 cal. a BP, which facilitated rice farming and large-scale architectural engineering in Liangzhu Ancient City. Evidence from microfossils and dating of the yellowish silty sediments indicated that Liangzhu Ancient City was significantly affected by seawater after abandonment during 4300–3400 cal. a BP. Furthermore, geochemical evidence, including trace element and Sr-Nd isotopic compositions, suggested that the primary provenance of the yellowish silt was a mixture of sediments from the Qiantang River, East China Sea, Yangtze River and Yellow River, which had been transported to Liangzhu Ancient City by the Yellow Sea Coastal Current and a marine transgression. Therefore, based on evidence from archaeological sites and numerical simulation in the Yangtze Delta, it was supposed that the short-term accelerated relative sea-level rise at approximately 4400 cal. a BP caused a marine transgression around Taihu Lake, formed a large range of yellowish silty sediments, destroyed rice farming production, and ultimately led to the collapse of the Liangzhu Culture.
Construction of CoS_2 nanoparticles embedded in well-structured carbon nanocubes for high-performance potassium-ion half/full batteries

Metal sulfides have been widely investigated as promising electrode materials for potassium-ion batteries (PIBs) due to their high theoretical capacities. However, the practical application of metal sulfides in PIBs is still hindered by their intrinsic shortcomings of low conductivity and severe volume changes during the potassiation/depotassiation process. Herein, a simple template-based two-step annealing strategy is proposed to impregnate CoS_2 nanoparticles in the well-structured carbon nanocubes (denoted CoS_2/CNCs) as an advanced anode material for PIBs. The ex-situ XRD measurements reveal the K~+ storage mechanism in CoS_2/CNCs. Benefiting from the unique structures, including abundant active interfacial sites, high electronic conductivity, and significantly alleviated volume variation, CoS_2/CNCs present a high specific capacity (537.3 mAh g~(-1) at 0.1 A g~(-1)), good cycling stability (322.4 mAh g~(-1) at 0.5 A g~(-1) after 300 cycles), and excellent rate capability (153.1 mAh g~(-1) at 5 A g~(-1)). Moreover, the obtained nanocomposite shows superior potassium storage properties in K-ion full cells when it is coupled with a KVPO_4F cathode.
A novel reversible-deactivation radical polymerization strategy via near-infrared light-controlled photothermal conversion dividing wall-type heat exchanger

As an effective means of utilizing light energy, photothermal conversion has excellent application in the field of polymerization. Herein, a dividing wall-type heat exchanger with the aid of photothermal conversion was designed to conduct polymerization under irradiation with near-infrared (NIR) light by utilizing the ketocyanine-type dye solution as the highly efficient activator (>83.2% photothermal conversion efficiency). Various types of reversible-deactivation radical polymerization (RDRP) methods, including reversible addition-fragmentation chain transfer, atom transfer radical polymerization, and bromine-iodine transformation RDRP, are suitable for this strategy. Well-defined polymers with excellent control over molar mass and molar mass dispersity (D < 1.28) were thus synthesized within a few hours under NIR (λ_(max) = 810 nm, 850 nm) irradiation at room temperature. Importantly, in addition to conventional heating methods (such as electrical heating jackets), the designed dividing wall-type heat exchanger via NIR light activation has another unique advantage: it can enhance the polymerization by the synergistic effect of both heating and NIR light irradiation due to the deeper penetration of NIR light.
Reactivity of hydrogen species on oxide surfaces

Hydrogen species on oxides are widely involved in oxides-catalyzed reactions such as H2/hydrocarbon oxidation, hydrogenation/dehydrogenation, water-gas shift, and water-splitting reactions. Thus identifications of hydrogen species on oxide surfaces and their reactivity are important for fundamental understanding of these oxides-catalyzed reactions. In this Feature Article, we briefly review our research progress on the reactivity of various hydrogen species on oxides, including surface hydroxyl species, hydride species and hydrated protons. We have successfully developed effective strategies of using gas-phase atomic H to controllably create oxygen vacancies and prepare various hydrogen species on oxide model catalysts under ultra-high vacuum (UHV) conditions and using well-defined oxide nanocrystals with different surface structures and oxygen vacancy concentrations to study the H2-oxide interaction under ambient or even higher H2 pressures. Reactivity of various hydrogen species on oxide surfaces has been identified, including local oxygen vacancy-controlled reactivity of OH species, oxygen vacancystabilized hydride species, homolytic dissociation of H2 at oxygen vacancies of reduced oxide surfaces into hydride species accompanied by surface oxidation, photoexcited holes-stimulated desorption of hydride species, electron-stimulated desorption of hydride and OH species, and photoexcited electrons-stimulated desorption of hydrated protons. Strong influences of oxygen vacancies in oxides on both stability and reactivity of various hydrogen species on oxide surfaces are highlighted.
Non-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells

D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells (PSCs), and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal Dand A-units. Here, we first propose a non-equivalent D-A copolymerization strategy with unequal D- and A-units, and develop three novel non-equivalent D-A copolymer donors (PM6-D1, PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9, 1.2:0.8 and 1.3:0.7, respectively) by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochemical and photovoltaic properties of the polymers. The three non-equivalent D-A copolymers show the down-shifted highest occupied molecular orbital (HOMO) energy levels, higher hole mobility, higher degree of molecular self-assembly and higher molecular crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer PM6. As a result, all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency (PCE) with higher V_(oc), larger J_(sc) and higher FF simultaneously. Particularly, the PM6-D1:Y6 based PSC achieved a high PCE of 17.71%, which is significantly higher than that (15.82%) of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs.
Interfacial compatibility issues in rechargeable solid-state lithium metal batteries: a review

Solid-state lithium metal batteries (SSLBs) contain various kinds of interfaces, among which the solid electrode|solid electrolyte (ED|SE) interface plays a decisive role in the battery’s power density and cycling stability. However, it is still lack of comprehensive knowledge and understanding about various interfacial physical/chemical processes so far. Although tremendous efforts have been dedicated to investigate the origin of large interfacial resistance and sluggish charge (electron/ion) transfer process, many scientific and technological challenges still remain to be clarified. In this review, we detach and discuss the critical individual challenge, including charge transfer process, chemical and electrochemical instability, space charge layers, physical contact and mechanical instability. The fundamental concepts, individual effects on the charge transfer and potential solutions are summarized based on material’s thermodynamics, electrode kinetics and mechanical effects. It is anticipated that future research should focus on quantitative analysis, modeling analysis and in-situ microstructure characterizations in order to obtain an efficient manipulation about the complex interfacial behaviors in all solid-state Li batteries.
Strong constraints on Lorentz violation using new γ-ray observations around PeV

The tiny modification of dispersion relation induced by Lorentz violation (LV) is an essential topic in quantum gravity (QG) theories, which can be magnified into significant effects when dealing with astrophysical observations at high energies and long propagation distances. LV would lead to photon decay at high energies; therefore, observations of high-energy photons could constrain LV or even QG theories.
Dual Toeplitz Operators on the Orthogonal Complement of the Harmonic Bergman Space

In this paper, we characterize that the boundedness, compactness and spectral structure of dual Toeplitz operators acting on the orthogonal complement of the harmonic Bergman space. This generalizes the corresponding results for dual Toeplitz operators on the orthogonal complement of the Bergman space due to Stroethoff and Zheng's paper [Trans. Amer. Math. Soc., 354, 2495–2520 (2002)].
Mesenchymal stem cells alleviate airway inflammation via modulation of T-helper 17/regulatory T cells balance in mice with ovalbumin-induced asthma

Asthma is considered dysregulated immunity featuring of chronic airway inflammation and remodeling. Mounting evidence reveals that asthmatics show various inflammatory profiles and cell types. Recently, regulatory T cells (Tregs) and T-helper (Th) 17 cells have been described as two distinct subsets from Th1 and Th2 cells and Treg/Th17 imbalance is correlated with the development of asthma.
GLOBAL STRONG SOLUTION AND EXPONENTIAL DECAY OF 3D NONHOMOGENEOUS ASYMMETRIC FLUID EQUATIONS WITH VACUUM

We prove the global existence and exponential decay of strong solutions to the three-dimensional nonhomogeneous asymmetric fluid equations with nonnegative density pro- vided that the initial total energy is suitably small. Note that although the system degener- ates near vacuum, there is no need to require compatibility conditions for the initial data via time-weighted techniques.
Engineering heterointerfaces coupled with oxygen vacancies in lanthanum-based hollow microspheres for synergistically enhanced oxygen electrocatalysis

The development of high-efficiency and low-cost bifunctional oxygen electrocatalysts is critical to enlarge application of zinc-air batteries (ZABs).However,it still remains challenges due to their uncontrollable factor at atomic level during the catalysts preparation,which requires the precise regulation of active sites and structure engineering to accelerate the reaction kinetics for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).Herein,a novel Co-doped mixed lanthanum oxide and hydroxide heterostructure (termed as Co-LaMOH|O_V@NC) was synthesized by pyrolysis of La-MOF-NH_2 with spontaneous cobalt doping.Synergistic coupling of its hollow structure,doping effect and abundant oxygen vacancies creates more active sites and leads to higher electroconductivity,which contribute to the better performance.As employed as a bifunctional oxygen electrocatalyst,the resulting 3Co-LaMOH| O_V@NC exhibits superior electrocatalytic activity for both ORR and OER.In assembled ZAB,it also demonstrates an excellent power density of 110.5 mW cm~(-2),high specific capacity of 810 mAh gZn -1,and good stability over 100 h than those of Pt/C + RuO_2.Density functional theory (DFT) calculation reveals that the heterointerfaces coupled with oxygen vacancies lead to an enhanced charge state and electronic structure,which may optimize the conductivity,charge transfer,and the reaction process of catalysts.This study provides a new strategy for designing highly efficient bifunctional oxygen electrocatalysts based on rare earth oxide and hydroxides heterointerface.
In-situ growth of CNTs encapsulating P-doped NiSe_2 nanoparticles on carbon framework as efficient bifunctional electrocatalyst for overall water splitting

Nickel diselenide (NiSe_2) is a promising low-cost catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER),due to its suitable d-electron configuration and high electrical conductivity.Several representative elements,e.g.,Co,Fe and P,have been utilized as cation or anion to promote the electrocatalytic activity of NiSe_2 by modulating the interaction with Se element,whilst the catalyst stability is less concerned.In this work,the catalytic Ni nanoparticles were in-situ encapsulated in carbon nanotubes grown on three-dimensional conducting carbon framework.Subsequent phosphorization and selenization yield dispersed P-doped NiSe_2 nanoparticles protected by carbon shell with highly exposed yet stable active sides,resulting in significantly promoted HER and OER activities as well as accelerated kinetics.In detail,the P-NiSe_2@N-CNTs/NC hybrid catalyst deliver low overpotentials of 95 and 306 mV at 10 mA cm~(-2) for HER and OER in alkaline media,respectively.DFT calculations reveal that P doping reduces the electron density surrounding Ni atoms while accumulates the charges to Se,respectively,which in turn reduces the energy barriers for both water dissociation and intermediates adsorption for both HER and OER.As a concept of proof,a cell assembled by P-NiSe_2@N-CNTs/NC hybrid catalystbased anode and cathode performs a low applied voltage of 1.609 V to reach 10 mA cm~(-2),and outstanding long-term stability.