bluuebunny/crossref_metadata_2025_split huggingface dataset:
Uniqueness theorems for tomographic phase retrieval with few coded diffraction patterns
Authors: Fannjiang Albert 
Published: June 2022

Abstract
3D tomographic phase retrieval under the Born approximation for discrete objects supported on a n × n × n grid is analyzed. It is proved that n projections are sufficient and necessary for unique determination by computed tomography with full projected field measurements and that n + 1 coded projected diffraction patterns are sufficient for unique determination, up to a global phase factor, in tomographic phase retrieval. Hence n + 1 is nearly, if not exactly, the minimum number of diffractions patterns needed for 3D tomographic phase retrieval under the Born approximation.
Recent progress in stretchable and self-healable supercapacitors: active materials, mechanism, and device construction
Authors: Tung Yen-Yu , Gull Sanna , Ni Chung-Sheng , Chiu Wan-Ju , Chen Han-Yi 
Published: June 2022

Abstract
With the increasing popularity of wearable electronics and flexible screens in recent years, stretchable supercapacitors (SCs) have gained immense attention. However, such devices are often operated under conditions that cause large-scale deformation. Therefore, the self-healing of these devices during damage is also gradually being considered. This review introduces the recent research on stretchable and self-healing SCs and the effects of device construction, current collectors, and electrolytes on their mechanical stretchability, electrochemical performance, and practical applications. Finally, the limitations in the practical applications of such SCs and the possible solutions are discussed to provide an understanding for the development of high-performance devices in the future.
Atomic structure and Mott nature of the insulating charge density wave phase of 1T-TaS2
Authors: Petkov V , Peralta J E , Aoun B , Ren Y 
Published: June 2022

Abstract
Using x-ray pair distribution function (PDF) analysis and computer modeling, we explore structure models for the complex charge density wave (CDW) phases of layered 1T-TaS2 that both well capture their atomic-level features and are amenable to electronic structure calculations. The models give the most probable position of constituent atoms in terms of 3D repetitive unit cells comprising a minimum number of Ta–S layers. Structure modeling results confirm the emergence of star-of-David (SD) like clusters of Ta atoms in the high-temperature incommensurate (IC) CDW phase and show that, contrary to the suggestions of recent studies, the low-temperature commensurate (C) CDW phase expands upon cooling thus reducing lattice strain. The C-CDW phase is also found to preserve the stacking sequence of Ta–S layers found in the room temperature, nearly commensurate (NC) CDW phase to a large extent. DFT based on the PDF refined model shows that bulk C-CDW 1T-TaS2 also preserves the insulating state of individual layers of SD clusters, favoring the Mott physics description of the metal-to-insulator (NC-CDW to C-CDW) phase transition in 1T-TaS2. Our work highlights the importance of using precise crystal structure models in determining the nature of electronic phases in complex materials.
A new health indicator for rolling bearings based on impulsiveness and periodicity of signals
Authors: Qian Mengui , Yu Yaoxiang , Guo Liang , Gao Hongli , Zhang Ruiqi , Li Shichao 
Published: June 2022

Abstract
The early fault diagnosis of rolling bearings is of great significance. Most existing methods are insensitive to the early faults of bearings and unstable for different bearings. In order to solve these issues, a new health indicator based on the impulsiveness and periodicity of signals is proposed to diagnose bearing faults and identify initial degradation points (IDPs). First of all, the time domain signal is divided into multiple signal blocks. Secondly, the median local kurtosis (MLK) and fault characteristic order point amplitude (FAMP) of each signal block are calculated respectively to represent the impulsiveness and periodicity of the signal. By combining MLK with FAMP, MLK-FAMP is obtained to screen out the signal blocks containing fault information. Lastly, the FAMP of screened signal blocks is calculated by order analysis, which contains four components corresponding to four faults. The early failure type of bearings is identified according to the trend of these four components of FAMP. A relative similarity principle is applied to corresponding fault components to obtain the final health indicator, namely the MLK-FAMP-health indicator. The proposed method is validated in two cases and compared with indicators constructed using other methods. The results show that this method is able to precisely diagnose early faults and accurately identify the IDPs of bearings.
Arrhythmia classification of 12-lead and reduced-lead electrocardiograms via recurrent networks, scattering, and phase harmonic correlation
Authors: Warrick Philip A , Lostanlen Vincent , Eickenberg Michael , Nabhan Homsi Masun , Campoy Rodríguez Adrián , Andén Joakim 
Published: June 2022

Abstract
We describe an automatic classifier of arrhythmias based on 12-lead and reduced-lead electrocardiograms. Our classifier comprises four modules: scattering transform (ST), phase harmonic correlation (PHC), depthwise separable convolutions (DSC), and a long short-term memory (LSTM) network. It is trained on PhysioNet/Computing in Cardiology Challenge 2021 data. The ST captures short-term temporal ECG modulations while the PHC characterizes the phase dependence of coherent ECG components. Both reduce the sampling rate to a few samples per typical heart beat. We pass the output of the ST and PHC to a depthwise-separable convolution layer (DSC) which combines lead responses separately for each ST or PHC coefficient and then combines resulting values across all coefficients. At a deeper level, two LSTM layers integrate local variations of the input over long time scales. We train in an end-to-end fashion as a multilabel classification problem with a normal and 25 arrhythmia classes. Lastly, we use canonical correlation analysis (CCA) for transfer learning from 12-lead ST and PHC representations to reduced-lead ones. After local cross-validation on the public data from the challenge, our team ‘BitScattered’ achieved the following results: 0.682 ± 0.0095 for 12-lead; 0.666 ± 0.0257 for 6-lead; 0.674 ± 0.0185 for 4-lead; 0.661 ± 0.0098 for 3-lead; and 0.662 ± 0.0151 for 2-lead.
A 16 nm FinFET circuit with triple function as digital multiplexer, active-high and active-low output decoder for high-performance SRAM architecture
Authors: B Jeevan , K Sivani 
Published: June 2022

Abstract
This paper presents a fin field-effect transistor (FinFET)-based single circuit (FSC) used to realize an active-high output decoder (AHD), active-low output decoder (ALD) and digital multiplexer. Traversal of the input signal through a single transmission gate irrespective of the size of the FSC is unique to this proposed multiplexer. This new FSC architecture uses an equal number of n-FinFET and p-FinFET devices, requiring few transistors compared with complementary metal oxide semiconductor designs. Three novel circuits are created using various logic styles following the same architecture. This FSC is compared with these similar circuits and, on average, the results for power dissipation and delay in the worst case show that this FSC is better by 14% and 18%, respectively. A FSC is created and extensively simulated with 16 nm FinFET technology using Eldo software. All the circuits are designed for 0.75 V, 1 V and 1.25 V and are stimulated with multiple input frequencies. The proposed circuit is most suitable for row address decoders and column multiplexers of static random access memories.
Probing virtual axion-like particles by precision phase measurements
Authors: Zarei Moslem , Shakeri Soroush , Sharifian Mohammad , Abdi Mehdi , Marsh David J.E. , Matarrese Sabino 
Published: June 2022

Abstract
We propose an experiment for detecting Axion-Like Particles (ALPs) based on the axion-photon interaction in the presence of a non-uniform magnetic field. The impact of virtual ALPs on the polarization of the photons inside a cavity is studied and a detection scheme is proposed.
We find that the cavity normal modes are dispersed differently owing to their coupling to the ALPs in the presence of a background magnetic field. This birefringence, in turn, can be observed as a phase difference between the cavity polarization modes.
The signal is considerably enhanced for a squeezed light source. We argue that the amplified signal allows for exclusion of a range of axion mass 6 × 10-4 eV ≲ ma
≲ 6 × 10-3 eV even at very small axion-photon coupling constant with the potential to reach sensitivity to the QCD axion.
Our scheme allows for the exclusion of a range of axion masses that has not yet been covered by other experimental techniques.
Probing non-thermal light DM with structure formation and N
eff
Authors: Baumholzer Sven , Schwaller Pedro 
Published: June 2022

Abstract
In many models of dark matter (DM), several production mechanisms contribute to its final abundance, often leading to a non-thermal momentum distribution. This makes it more difficult to assess whether such a model is consistent with structure formation observations.
We simulate the matter power spectrum for DM scenarios characterized by at least two temperatures and derive the suppression of structures at small scales and the expected number of Milky Way dwarf galaxies from it. This, together with the known bound on the number of relativistic
particle species, N
eff, allows us to obtain constraints on the parameter space of non-thermally produced DM.
We propose a simple parametrization for non-thermal DM distributions and present a fitting procedure that can be used to adapt our results to other models.
Optical properties of Al
x
Ga1−x
As/GaAs Woods–Saxon quantum well in the presence of hydrostatic pressure and applied electric field
Authors: Zhang Zhi-Hai , Shi Yi-Sheng , Yuan Jian-Hui 
Published: June 2022

Abstract
The third harmonic generation (THG), linear and nonlinear optical absorption coefficients (OACs), and refractive index changes (RICs) are investigated in a Woods–Saxon quantum well (QW) modulated by the hydrostatic pressure and applied electric field. The effect of non-uniform aluminum doping (position-dependent effective mass (PDEM)) on the mass of the system is discussed, and further to explore the influence of PDEM on the nonlinear THG, OACs, and RICs of the Woods–Saxon QW. These nonlinear optical properties above are obtained using the compact-density matrix formalism. The electron states in a Woods–Saxon QW under the constant effective mass (CEM) and PDEM are calculated by solving the Schrödinger equation via the finite difference technique. The contributions from competing effects of the hydrostatic pressure and applied electric field to the nonlinear optical properties with CEM and PDEM are reported, as well as the comparison with each other. The observations reveal that the regulation of external fields and the influence of PDEM play an important role in the photoelectric properties of QW.
Chaos due to symmetry-breaking in deformed Poisson ensemble
Authors: Das Adway Kumar , Ghosh Anandamohan 
Published: June 2022

Abstract
The competition between strength and correlation of coupling terms in a Hamiltonian defines numerous phenomenological models exhibiting spectral properties interpolating between those of Poisson (integrable) and Wigner–Dyson (chaotic) ensembles. It is important to understand how the off-diagonal terms of a Hamiltonian evolve as one or more symmetries of an integrable system are explicitly broken. We introduce a deformed Poisson ensemble to demonstrate an exact mapping of the coupling terms to the underlying symmetries of a Hamiltonian. From the maximum entropy principle we predict a chaotic limit which is numerically verified from the spectral properties and the survival probability calculations.
The technical proposal of energy control system for renewable energy usage
Authors: Zhao Heng , Liu Wei , Zhou Bin , Liu Zai-wang , Gao Jia-xin , Wang Hao-yang , Xie Chuan-Nan 
Published: June 2022

Abstract
The industry use of fossil fuels cause global warming and climate change. And, the grid is potentially not reliable source for power supply. Thus, the renewable energy decrease COX and NOX emission. It is suggested that alternative energy resources are encouraged and promoted by the world. That cause, energy control and facilities make reused energy efficiency in industrial region. In conclusion, the technical proposal of innovated and competitive renewable energy is fundamentally concerned rapidly.
Research on defect type diagnosis of composite insulator based on infrared detection technology
Authors: Li Xinran , Huang Qilin , Zhang Ruien , Chen Xiaolin , Geng Jianghai , Liu Yunpeng , Zhang Simin 
Published: June 2022

Abstract
Composite insulator is widely used in Hainan area of China because of its lightweight, small volume, good anti pollution flashover performance and many other advantages. Aiming at the problem of how to correctly judge the aging state of composite insulators under live conditions in Hainan’s high humidity environment, this paper analyzes the main causes of composite insulator heating and the heating position and temperature rise of composite insulator under different defect types by building equivalent circuit, and puts forward several criteria for distinguishing the defect types of composite insulator by infrared detection technology; taking the abnormal temperature rise of 220kV returned composite insulator in Hainan as an example, the defect type of the composite insulator is analyzed by infrared detection technology, and the correctness of the infrared results is verified by the appearance inspection and anatomical analysis of the test object. The results show that the defect that the temperature rise is between 1-5°C and only appears among the fittings and the first umbrella is caused by the aging, moisture absorption or surface pollution of the umbrella cover; the defect that the temperature rise is above 5°C and the range extends from the high-voltage end sheath to several umbrella skirts is caused by the internal deterioration of the insulator. In conclusion, the conclusion provides a guarantee for the safe operation of power grid and has important reference value for the study of on-line monitoring of composite insulators.
Configuration strategy and application for distribution network protection based on standalone 5G
Authors: Cai Y P , Yan Z H , Wang T , Wang Y M , Huang W , Li W 
Published: June 2022

Abstract
The 5G network, with its characteristics of wide coverage, high reliability and low delay communication, has a high application value in solving the “last kilometer” problem in interconnection between the terminal equipment of a distribution network. To improve the practical level of distribution network protection based on standalone 5G, we analyze the requirements of communication resource for distribution network protection firstly. Then, given the overall structure of 5G distribution network protection, a time synchronization scheme with higher reliability is proposed by means of homologous transmission of clock signal and data signal. At the same time, differential protection and regional protection are applied in an urban distribution network. The differences between the two protection methods in overhead lines and cables are analyzed. The results show that overhead lines are recommended for regional protection, and cables can be compatible with differential protection and regional protection.
Research on the Matching of Unequal Diameter Cables to Improve the Carrying Capacity of High-voltage Submarine Cable Landing Section
Authors: Pan Xiaomin , Zhang Shuang , Pan Jun 
Published: June 2022

Abstract
The conventional method of increasing the current carrying capacity of the submarine cable landing section increases the manufacturing cost of the submarine cable and the long-term operational reliability. This paper introduces the unequal diameter cable joint technology, the actual current-carrying capacity of the 220kV submarine cable landing section and the submarine section was checked. A differentiated unequal diameter submarine cable landing section and submarine section conductor cross-section matching principle was put forward. The economic efficiency of the unequal diameter cable matching scheme was evaluated. The research results show that, the larger the conductor cross-section of the submarine cable, the greater the drop in current-carrying capacity during the landing section. In the unequal diameter matching method, the single-core or copper wire armored submarine section cable requires a smaller conductor cross-section. The maximum transmission capacity can be obtained when the submarine cable line is all single-core copper wire armored. When it is all single-core steel wire armor, it can take into account the larger transmission capacity of the submarine cable line and the optimal unit capacity cost. This article provides a reference for the design and selection of submarine cable lines.
Research on Multi-party Data Secure Interaction Technology for Energy Internet
Authors: Zhang X J , Miao S W , Zhu Y Y , Lin Z Q , Hu B J , Jiang L , Cao J Y 
Published: June 2022

Abstract
Aiming at the problems of the energy Internet interaction process, which involves more users and intermediate links, and each participant is independent of each other, information asymmetry, and participants do not trust each other, this paper proposes a blockchain-based energy Internet multiparty data interaction model to build a data circulation architecture, including four layers, which are data sensing layer, network transmission layer, data processing layer and application service layer, to realize identity association, cross-domain access, It can realize the basic functions such as identity association, cross-domain access, trust evaluation and privacy protection, and effectively guarantee the secure interaction of multi-party data in the energy Internet.
Study on power grid transient stability control assisted by large-scale energy storage
Authors: Chen Changqing , Li Xinran 
Published: June 2022

Abstract
With the development of energy storage technology, energy storage power station has gradually become one of the main means to solve the voltage instability of the main network caused by uHV DC bipolar phase lock. Therefore, energy storage model has become a difficulty in research. Firstly, the structure model of power storage station participating in power grid voltage transient stability control system is constructed, and the control strategy of power storage station is analyzed. Secondly, in the power system analysis software package (PSASP), the ES model of transient voltage stability control is established by using user-defined modules, and each module in the model is introduced in detail, so as to realize the purpose of enhancing voltage transient stability control of energy storage power station connected to the power grid. Finally, the simulation results show that compared with the adjustable camera, the voltage recovery speed is faster when the same capacity ES is connected in the same place. For example, the voltage recovery speed of 110kV bus decreases from 2.42s to 1.69s, and the recovery speed is increased by 30.17%. And PCS of ES power station has enough short time (<1s) overload capacity, then the ES configuration capacity can be less than the camera capacity.
Detection Method of Power Saving Mode of Household Photovoltaic-Storage Integrated Power Supply
Authors: Yan Xiangwu , Bai Lin , Song Xinyi , Tian Ye , Yang Haohan , Gong Haifeng , Lei Jianhua 
Published: June 2022

Abstract
Nowadays, more importance has been attached to the energy consumption of household energy storage inverters. This paper proposes a design scheme of original-auxiliary dual power supply for household energy storage inverters, so that the inverter uses a large-capacity power supply when it is loaded with medium or large loads, and uses a small-capacity power supply when it is loaded with light loads or no load, and avoids large losses caused by the two-stage inverter when using a large-capacity power supply with a small load with the purpose of energy saving. The solution adopts a peak detection circuit on the AC power supply side, which can accurately detect the tiny current when the 1∼3W-load is connected, so as to accurately judge the access and exit of the load, so that the power supply can enter or exit the power saving mode of the small-capacity power supply in a timely and flexible manner. In this paper, the feasibility and rationality of the scheme are tested by simulation, and it is proved that the power saving effect of the scheme is remarkable.
Study on the impact properties of SA-738Gr.B welded by SMAW
Authors: Zhang Fayun , Wang Yan , Yang Chenggang 
Published: June 2022

Abstract
The impact property of SA-738Gr.B welding joint and the effect of post weld heat treatment (PWHT) on the impact property of welding joint were studied. The results show that the impact properties of the welded joint without PWHT can meet the requirements of the specification, the impact properties of the weld and heat affected zone reduced after PWHT, and the impact toughness of the weld decreases more, but all meet the requirements of the specification.
Stable and High-Performance Organ0ic Aqueous Dual-Ion Batteries with Polyaniline/CNTs Cathode
Authors: Guo Jun , Liu Wanqiang 
Published: June 2022

Abstract
Organic aqueous dual-ion batteries are accepted as the next-generation energy storage strategy for large-scale systems of energy storage to address the flammable and electrochemical stability problems that are encountered in lithium-ion batteries. However, conventional organic materials are restricted by high solubility in electrolytes during the process of discharging. Here, we present an integrated organic aqueous dual-ion battery that contains a stable, highly electrically conductive polymer as an effective cathode material for aqueous batteries. The battery has a capacity of 134 mAh g−1 and a cycle life of 700 cycles at a current density of 1 A g−1.
Cause Analysis and Improvement Measures for Pipeline Cracking of 9Cr-1Mo Material
Authors: Xu Liang , Hu FengTao , Ma DongFang , Hou Shuang , Zhang ShuHao 
Published: June 2022

Abstract
The cracking reason of steam drainage pipe in a thermal power plant has been analyzed by means of alloy composition test, microstructure analysis and mechanical calculation. The results show that under the site layout and operation conditions, there were more water accumulated in the pipeline, the temperature of the pipeline decreased, and the movement of the drainage pipe was blocked by the floor, causing the stress of the drainage pipe socket exceeds the allowable value. The type IV creep crack was produced in the fine-grained zone of the heat affected zone of the pipe socket and the leakage failure occurred. The analysis clarifies the cause of cracking of steam drainage pipe and provides reference for avoiding similar cracks in 9Cr-1Mo materials.