bluuebunny/crossref_metadata_2025_split huggingface dataset:
The quadrupole moment of compact binaries to the fourth post-Newtonian order: II. Dimensional regularization and renormalization
Authors: Larrouturou François , Blanchet Luc , Henry Quentin , Faye Guillaume 
Published: March 2022

Abstract
The regularization and renormalization of the radiative mass-type quadrupole moment of inspiralling compact binaries (without spins) is investigated at the fourth post-Newtonian (4PN) approximation of general relativity. As clear from the conservative 4PN equations of motion, a dimensional regularization has to be implemented in order to properly treat the non-linear interactions experienced by gravitational waves during their propagation towards future null infinity. By implementing such procedure, we show that the poles coming from the source moment (computed in a companion paper) are exactly cancelled in the radiative moment, as expected for a physical quantity. We thus define and obtain a ‘renormalized’ source quadrupole, three-dimensional by nature, which is an important step towards the computation of the gravitational-wave flux with 4PN accuracy. Furthermore, we explicitly prove the equivalence between the dimensional regularization and the previously used Hadamard partie finie scheme up to the 3PN order.
On regularization via frame decompositions with applications in tomography
Authors: Hubmer Simon , Ramlau Ronny , Weissinger Lukas 
Published: March 2022

Abstract
In this paper, we consider linear ill-posed problems in Hilbert spaces and their regularization via frame decompositions, which are generalizations of the singular-value decomposition. In particular, we prove convergence for a general class of continuous regularization methods and derive convergence rates under both a priori and a posteriori parameter choice rules. Furthermore, we apply our derived results to a standard tomography problem based on the Radon transform.
Qualitative effect of internal resonance on the dynamics of two-dimensional resonator
Authors: Arora Nishta , Naik Akshay K 
Published: March 2022

Abstract
Nonlinear modal interactions and associated internal resonance phenomena have recently been used to demonstrate improved oscillator performance and enhanced sensing capabilities. Here, we show tunable modal interaction in a molybdenum disulfide (MoS2) resonator. We achieve the tunability of coupling between these initially uncoupled modes by using electrostatic gate voltages. This tunable coupling enables us to make the modes commensurate and observe energy exchange between the modes. We attribute the strong energy exchange between the vibrational modes to 1:2 internal resonance. This interaction strongly impacts the dynamics of the modal response of such resonators. We observe peak splitting, a signature of energy exchange between the modes even when the modal response is in the linear regime. We model our device to explain the observed effect of excitation, detuning of modal frequencies, and intermodal coupling strength on the resonator dynamics. MoS2 resonators explored in this work are ideal for understanding the rich dynamics offered through the intermodal coupling.
Valley degree of freedom in two-dimensional van der Waals materials
Authors: Soni Ashish , Pal Suman Kalyan 
Published: March 2022

Abstract
Layered materials can possess valleys that are indistinguishable from one another except for their momentum. These valleys are individually addressable in momentum space at the K and K′ points in the first Brillouin zone. Such valley addressability opens up the possibility of utilizing the momentum states of quasi-particles as a completely new paradigm in both quantum and classical information processing. This review focuses on the physics behind valley polarization and discusses carriers of valley degree of freedom (VDF) in layered materials. We then provide a detailed survey of simple spectroscopic techniques commonly utilized to identify and manipulate valley polarization in van der Waals layered materials. Finally, we conclude with recent developments in the manipulation of VDF for device applications and associated challenges.
Signatures of superconducting triplet pairing in Ni–Ga-bilayer junctions
Authors: Costa Andreas , Sutula Madison , Lauter Valeria , Song Jia , Fabian Jaroslav , Moodera Jagadeesh S 
Published: March 2022

Abstract
Ni–Ga bilayers are a versatile platform for exploring the competition between strongly antagonistic ferromagnetic and superconducting phases. We characterize the impact of this competition on the transport properties of highly-ballistic Al/Al2O3(/EuS)/Ni–Ga tunnel junctions from both experimental and theoretical points of view. While the conductance spectra of junctions comprising Ni (3 nm)–Ga (60 nm) bilayers can be well understood within the framework of earlier results, which associate the emerging main conductance maxima with the junction films’ superconducting gaps, thinner Ni (1.6 nm)–Ga (30 nm) bilayers entail completely different physics, and give rise to novel large-bias (when compared to the superconducting gap of the thin Al film as a reference) conductance-peak subseries that we term conductance shoulders. These conductance shoulders might attract considerable attention also in similar magnetic superconducting bilayer junctions, as we predict them to offer an experimentally well-accessible transport signature of superconducting triplet pairings that are induced around the interface of the Ni–Ga bilayer. We further substantiate this claim performing complementary polarized neutron reflectometry measurements on the bilayers, from which we deduce (1) a nonuniform magnetization structure in Ga in a several nanometer-thick area around the Ni–Ga boundary and can simultaneously (2) satisfactorily fit the obtained data only considering the paramagnetic Meissner response scenario. While the latter provides independent experimental evidence of induced triplet superconductivity inside the Ni–Ga bilayer, the former might serve as the first experimental hint of its potential microscopic physical origin. Finally, we introduce a simple phenomenological toy model to confirm also from the theoretical standpoint that superconducting triplet pairings around the Ni–Ga interface can indeed lead to the experimentally observed conductance shoulders, which convinces that our claims are robust and physically justified. Arranging our work in a broader context, we expect that Ni–Ga-bilayer junctions could have a strong potential for future superconducting-spintronics applications whenever an efficient engineering of triplet-pairing superconductivity is required.
Double stochastic energetic resonance of underdamped two-scale bistable system
Authors: Mao Jiangen , Lin Min , Huang Yongmei , Hu Xiaofeng 
Published: March 2022

Abstract
Multistable structures have abundant nonlinear characteristics, a multi-level system with large-scale and small-scale bistable structures is constructed, and its dynamic characteristic is discussed. Based on the complete Langevin equation with an inertial term and a variable damping term, the relationship between the Kramers escape rate and the damping coefficient is deduced and the approximate analytical expression of the output response in the underdamped state is established. From the view of the energy, the mechanism of double resonance and resonance effect enhancement induced by damping is further revealed with the energy dissipation caused by damping as the core. The physical quantity work is introduced to measure the strength of the resonance effect. The results of theoretical analysis and numerical simulation indicate that as the damping coefficient decreases into the underdamping or even the weak damping scope, the double stochastic resonance phenomenon induced by noise still exists. The strongest resonance effect can be obtained with the optimal damping value.
Structural, electrical and optical properties investigation of nano-sized Sb0.1(SnO2)0.9
Authors: Mohamed Sara A , Ahmed Mahrous R , Ali H M , Abdel Hakeem A M 
Published: March 2022

Abstract
Solid state reaction method was used to prepare Sbx(SnO2)1−x (x = 0 and 0.1) with sintering temperatures, 600 °C and 800 °C. The crystallographic properties of undoped and doped SnO2 materials results showed the tetragonal rutile structure of SnO2. The crystallinity was clear and increased with increasing the heat treatment. For the most diffraction peaks the microstrain is negative because do ˂ ds indicating the generation of residual compressive stress in the surface. Rietveld refinement proved that a good fitting parameters Rp, Rwp, and χ
2 makes the derived samples to be in a high quality, especially Sb0.1(SnO2)0.9 sample. Scanning Electron Microscopy (SEM) indicated that a spherical shape of SnO2 with nanoparticles but plates and nanorods shaped of SnO2 were detected for Sb0.1(SnO2)0.9 compound that was sintered at 800 °C. SnO2 has grain size 67 nm and 86 nm at sintering temperatures 600 °C and 800 °C respectively, but after adding Sb the grain size decreases to be ≈44 nm at the same sintering temperatures. The electrical resistivity, ρ, of Sb0.1(SnO2)0.9 behaved as semiconductor-like. The magnetoresistance, MR, results showed that ρ(0.6 tesla) < ρ(0 tesla) at Tsint = 600 °C where ρ (0.6 tesla) > ρ (0 tesla) at Tsint = 800 °C because the crystallinity increased with increasing of the sintering temperatures. The results of seebeck showed that charge carriers are n-tape at Tsint = 600 °C and p-type at Tsint = 800 °C. The optical energy band, E

g
of Sb0.1(SnO2)0.9 which were 2.49 eV and 3.21 eV at Tsint = 600 °C and 800 °C respectively and the high values of the transmittance make this compound is candidate to work as window layer in solar cell applications. The results of susceptibility denotes that the Sb0.1(SnO2)0.9 compound is a paramagnetic material.
Herschel Investigation of Cores and Filamentary Structures in the Perseus Molecular Cloud
Authors: Zhang Chang , Zhang Guo-Yin , Li Jin-Zeng , Li Xue-Mei 
Published: March 2022

Abstract
Cores and filamentary structures are the prime birthplaces of stars, and play key roles in the process of star formation. Latest advances in the methods of multi-scale source and filament extraction, and in making high-resolution column density map from Herschel multi-wavelength observations enable us to detect the filamentary network structures in highly complex molecular cloud environments. The statistics for physical parameters shows that core mass strongly correlates with core dust temperature, and M/L strongly correlates with M/T, which is in line with the prediction of the blackbody radiation, and can be used to trace evolutionary sequence from unbound starless cores to robust prestellar cores. Crest column densities of the filamentary structures are clearly related with mass per unit length (M
line), but are uncorrelated by three orders ranging from ∼1020 to ∼1022 cm−2 with widths. Full width at half maximum has a median value of 0.15 pc, which is consistent with the 0.1 pc typical inner width of the filamentary structures reported by previous research. We find 70% of robust prestellar cores (135/199) embedded in supercritical filaments with M
line > 16 M
⊙ pc−1, which implies that the gravitationally bound cores come from fragmentation of supercritical filaments. On the basis of observational evidence that the probability distribution function with power-law distribution in the Perseus south is flatter than in the north, the number of young stellar objects in the south is significantly less than that in the north, and dust temperature is different. We infer that the south region is more gravitationally bound than the north region.
New Energy and UHVDC Power Absorption Capacity Analysis Method Based on Refined Operation Simulation Technology
Authors: Hu Gebiao , Hong Shaoyun , Yang Weikang , Shu Zhan , Wang Jie 
Published: March 2022

Abstract
In order to comprehensively consider a variety of complex factors such as new energy integration, maximum and minimum load, network security constraints, and analyse the new energy absorption capacity of the power grid before and after the UHVDC power access in the province, and study the steady-state power absorption capacity of UHVDC, this paper deeply studies refined time series operation simulation model, designs constraints before and after the UHVDC power access, and establishes a new energy and UHVDC power absorption capacity analysis method based on refined operation simulation technology, and applies this method to analyse the power grid of the province before and after the UHVDC power is put into operation. This method provides technical support for demonstrating power supply and power grid planning schemes.
Characteristic analysis of compressed air energy storage system based on intermediate cooling
Authors: Sun Huan , Xu Haorong , Teng Xinbo , Liu Xinghua , Zhu Junda 
Published: March 2022

Abstract
With the shortage of traditional fossil energy and the aggravation of global warming, the demand for transformation from traditional fossil energy to renewable energy becomes more and more urgent. Compressed air energy storage technology is a guaranteed technology to overcome the time limit of renewable energy and achieve sustainable, efficient and large-scale application of renewable resources. In order to solve the traditional compressed air energy storage technology energy output variety is single, there is low grade energy waste defects. This paper presents a compressed air energy storage system based on intermediate cooling. Through the intercooler, the system adjusts the inlet temperature of the expander, improves the output cooling quality, and realizes the coupling operation of refrigeration and energy storage. This paper establishes a thermodynamic model of the system, analyzes the effects of ambient air temperature and inlet temperature of expander on system performance, and compares the energy efficiency ratio of the system with that of compressed air refrigeration system. The simulation results show that the system can adjust the inlet temperature of expander to increase the net power consumption and achieve high quality cooling output.
Abnormal Detection Model of Energy Consumption Data in Beneficiation and Metallurgy Enterprises based on Transfer Learning
Authors: Yu Zhuchao , Chu Gaixia , Zhang Yuanzheng , Zhou Siyuan , He Shaowei , Li Jing 
Published: March 2022

Abstract
The energy consumption data of beneficiation and metallurgy enterprises has the characteristics of multi-dimensional and timing. An energy consumption data anomaly detection model based on transfer learning is proposed to help enterprises monitor the abnormal energy use. The combination of transfer learning and DTW algorithm is used to eliminate the adverse impact of timing on the model, and the ensemble learning is used to realize data detection. Finally, an efficient and accurate energy consumption data anomaly detection model is formed. The detection accuracy of the model is 91.6%, which can effectively meet the requirements of enterprise energy management.
Unravelling the effects of ibuprofen-acetaminophen infused copper-bioglass towards the creation of root canal sealant
Authors: S Chitra , Chandran Riju , R Ramya , D Durgalakshmi , S Balakumar 
Published: March 2022

Abstract
Impact towards the tuneable characteristics of bioactive glasses (BAGs) has been explored; as there is no root canal sealant till date with ideal characteristics competent enough to manoeuvre the perplexing root canal architecture. Combeite, calcite and traces of cuprorivaite crystalline phases were validated for material formation, in which Cu 2P (XPS) peak authenticating the presence of copper in bioglass network (Cu-BAG). Spherical and platelet-like morphologies were observed and the grain size of Cu-BAG (∼100 nm) was lesser as compared to BAG (∼1 µm). These particle distributions impacted the porosity, and dominant non-bridging oxygens in Cu-BAG influences ionic dissolution, which subsequently enhanced the mineralization. These bioactive materials were loaded with acetaminophen and ibuprofen, corresponding organic moieties was confirmed through Fourier transform infra-red. These drugs loaded bioactive materials exhibited tremendous anti-inflammatory and anti-microbial behaviour with better sealing ability. Drug loaded bioglass paste filled in biomechanically prepared root canal was estimated for sealing potential, mineralization, micro leakage, and fracture resistance properties. Hydroxyl apatite growth was noted on the sealants, flower like protuberance confirmed the sealing potential of the prepared material. Bioglass exhibited promising characteristics required in a root canal sealant. This investigation is a step further towards tailoring the properties of bioactive materials as promising candidates in root canal obturation and thereof.
Fisheries yields and species declines in coral reefs
Authors: McClanahan T R 
Published: March 2022

AbstractNegative trade-offs between food production and biodiversity and the positive functional diversity–productivity relationships are potentially conflicting paradigms that are frequently evoked in conservation and sustainability science and management. While the complementary niches of species could potentially increase fisheries yields, stark food-diversity trade-offs have been proposed for wild-caught fisheries. Nevertheless, this first evaluation of stock biomass, yields, and species relationships in 115 coral reef locations in the Western Indian Ocean found that management for multispecies-maximum sustained yield (MMSY) will increase both food production and numbers of species relative to open access fisheries. A precipitous loss of >50% of species did not occur until >70% of the fishable and target biomasses was depleted. At MMSY, 6%–15% of total predicted number of fish species were lost indicating a need for other conservation mechanisms. These patterns occurred because the best-fit to the yield-numbers of species relationship was either a saturation or convex parabolic relationship. Fishing at MMSY in coral reefs should provide considerable diversity required to support many ecosystem services. Low biomass and overfishing were common and around 80% of studied locations were losing ∼2.0–2.5 tons km−2yr−1and 15%–40% of their species relative to MMSY.
Random access test as an identifier of nonclassicality*
Authors: Heinosaari Teiko , Leppäjärvi Leevi 
Published: March 2022

Abstract
Random access codes (RACs) are an intriguing class of communication tasks that reveal an operational and quantitative difference between classical and quantum information processing. We formulate a natural generalization of RACs and call them random access tests (RATs), defined for any finite collection of measurements in an arbitrary finite dimensional general probabilistic theory. These tests can be used to examine collective properties of collections of measurements. We show that the violation of a classical bound in a RAT is a signature of either measurement incompatibility or super information storability. The polygon theories are exhaustively analysed and a critical difference between even and odd polygon theories is revealed.
Tempered fractionally integrated process with stable noise as a transient anomalous diffusion model
Authors: Sabzikar Farzad , Kabala Jinu , Burnecki Krzysztof 
Published: March 2022

Abstract
We present here the autoregressive tempered fractionally integrated moving average (ARTFIMA) process obtained by taking the tempered fractional difference operator of the non-Gaussian stable noise. The tempering parameter makes the ARTFIMA process stationary for a wider range of the memory parameter values than for the classical autoregressive fractionally integrated moving average, and leads to semi-long range dependence and transient anomalous behavior. We investigate ARTFIMA dependence structure with stable noise and construct Whittle estimators. We also introduce the stable Yaglom noise as a continuous version of the ARTFIMA model with stable noise. Finally, we illustrate the usefulness of the ARTFIMA process on a trajectory from the Golding and Cox experiment.
Study on economic operating mode for combined desulfurization system of circulating fluidized bed unit
Authors: Yang Rufei , Zhang Hongfu , Gao Mingming 
Published: March 2022

Abstract
With the stricter emission regulation taking effect, most of circulating fluidized bed (CFB) power generation units operates with conventional desulfurization in CFB furnace and flue gas desulfurization (FGD) technology to meet the requirements of ultralow SO2 emission. Therefore, it is urgent to analyse operating cost of the combined desulfurization system and explore the low-cost operating mode for CFB units. In this paper, the operating cost model of combined desulfurization system was established, in which the influence of desulfurization in furnace on thermal efficiency of the CFB boiler was considered. Then, the operating cost of combined desulfurization system under different load conditions for a 300MW subcritical CFB unit was analysed, combined with measured data. The operating cost optimization result shows that, under different loads, when Ca/S is in the range of 0.4 to 0.5, the operating cost of combined desulfurization system reaches the minimum. In addition, as the unit load increases, the higher proportion of SO2 removal in FGD is required to achieve low-cost operating mode for CFB units.
Parameter optimization and field test of nano variable-viscosity slick water fracturing in Changqing shale reservoir
Authors: Liu Hanbin , Bai Hao , Lv Baoqiang , Li Chengzheng , Liu Jin , Huang Guopeng , Yao Erdong , Zhou Fujian 
Published: March 2022

Abstract
After the development of the directional and horizontal wells of Chang 7 shale reservoir in Ordos Basin, the formation pressure decreases rapidly and the production decreases naturally. There is an urgent need for fracturing fluid with oil displacement and enhancing oil recovery (EOR) function, and the on-site fracturing process parameters are optimized. Through laboratory experimental research, nano variable-viscosity slick water has the advantages of high drag reduction, strong sand-carrying, and imbibition oil displacement capacity, which significantly improves the deficiency of sand-carrying and oil displacement performance of conventional slick water. At the same time, the numerical simulation shows that when the injection displacement is 18 m3/min, the cluster spacing is 5 m, the number of perforation clusters is 7 and the sand addition intensity is 3 t/m, the fracturing reconstruction volume can be maximized, which is the optimal parameter for fracturing construction of Chang 7 reservoir. Combined with nano variable-viscosity slick water and optimal construction parameters, field fracturing tests were carried out in 13 wells, including 9 directional wells and 4 horizontal wells; The average daily oil production of horizontal wells is 17.77 t, the cumulative oil production is 377.33 t, and the production is increased by 10∼15 times. It is a new and effective method for the development of Changqing shale reservoir to combine the nano variable-viscosity slick water system of strong oil displacement and sand-carrying capacity with high displacement construction technology.
Study on Influence of temperature on cementing in deep shale oil and gas exploitation
Authors: Zhang Xiaoyu , Yang Hanzhi , Bi Zhenhui 
Published: March 2022

Abstract
In this paper, the mechanical model of sheath has been established according to the engineering practice and analysed in two aspects: temperature acts alone and temperature and pressure act together. The results demonstrate that it is unnecessary to worry the negative influence of individual temperature action. Temperature can cause many adverse characteristics temperature on cementing: thermal stress and material properties. The coefficient ∃ coming from the effective conduction of heat, prove the adverse condition of temperature on cement ring in terms of stress, and its size is positively correlated with temperature difference. Mechanical properties usually will be changed at high tempature, it can be measured by the later experiments, which can discuss the role of temperature is further.