bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of lattice voids on Rutherford backscattering dechanneling in tungsten
Authors: Jin Xin , Djurabekova Flyura , Sequeira Miguel , Lorenz Katharina , Nordlund Kai 
Published: December 2022

Abstract
The response of Rutherford backscattering spectrometry in channeling mode through a dechanneling mechanism to the presence of voids in crystals has been considered to be qualitatively weak. However there is a lack of the validation of its quantitative behavior. In this work, we present an investigation on the dechanneling induced by voids with different shapes in tungsten based on a simulation approach. We observe that dechanneling cross section of large voids is indeed found as a product of the minimum yield and the area projected from the void to the target surface as suggested by analytical models in literature. However, this method overestimates the dechanneling induced by small voids, in which the spatial distribution of incident ions inside a target has a non-negligible effect. We found that an inter-void distance effect is able to further lower dechanneling signals if the inter-void distance is small. When small spherical voids coalesce into a group of larger ones, the dechanneling fraction is not expected to increase. In addition, comparisons between voids and stacking faults show that there are significant discrepancies between these two defects in terms of dechanneling.
Deciphering phase evolution in complex metal oxide thin films via high-throughput materials synthesis and characterization
Authors: Li Ruoshui , Jiang Xuance , Zhou Chenyu , Topsakal Mehmet , Nykypanchuk Dmytro , Attenkofer Klaus , Stacchiola Dario J , Hybertsen Mark S , Stavitski Eli , Qu Xiaohui , Lu Deyu , Liu Mingzhao 
Published: December 2022

Abstract
Discovery of structure-property relationships in thin film alloys of complex metal oxides enabled by high-throughput materials synthesis and characterization facilities is demonstrated here with a case-study. Thin films of binary transition metal oxides (Ti–Zn) are prepared by pulsed laser deposition with continuously varying Ti:Zn ratio, creating combinatorial samples for exploration of the properties of this material family. The atomic structure and electronic properties are probed by spatially resolved techniques including x-ray absorption near edge structures (XANES) and x-ray fluorescence (XRF) at the Ti and Zn K-edge, x-ray diffraction, and spectroscopic ellipsometry. The observed properties as a function of Ti:Zn ratio are resolved into mixtures of five distinguishable phases by deploying multivariate curve resolution analysis on the XANES spectral series, under constraints set by results from the other characterization techniques. First-principles computations based on density function theory connect the observed properties of each distinct phase with structural and spectral characteristics of crystalline polymorphs of Ti–Zn oxide. Continuous tuning of the optical absorption edge as a function of Ti:Zn ratio, including the unusual observation of negative optical bowing, exemplifies a functional property of the film correlated to the phase evolution.
Reduced fatigue and leakage of ferroelectric TiN/Hf0.5Zr0.5O2/TiN capacitors by thin alumina interlayers at the top or bottom interface
Authors: Hsain H Alex , Lee Younghwan , Lancaster Suzanne , Lomenzo Patrick D , Xu Bohan , Mikolajick Thomas , Schroeder Uwe , Parsons Gregory N , Jones Jacob L 
Published: December 2022

Abstract
Hf0.5Zr0.5O2 (HZO) thin films are promising candidates for non-volatile memory and other related applications due to their demonstrated ferroelectricity at the nanoscale and compatibility with Si processing. However, one reason that HZO has not been fully scaled into industrial applications is due to its deleterious wake-up and fatigue behavior which leads to an inconsistent remanent polarization during cycling. In this study, we explore an interfacial engineering strategy in which we insert 1 nm Al2O3 interlayers at either the top or bottom HZO/TiN interface of sequentially deposited metal-ferroelectric-metal capacitors. By inserting an interfacial layer while limiting exposure to the ambient environment, we successfully introduce a protective passivating layer of Al2O3 that provides excess oxygen to mitigate vacancy formation at the interface. We report that TiN/HZO/TiN capacitors with a 1 nm Al2O3 at the top interface demonstrate a higher remanent polarization (2Pr ∼ 42 μC cm−2) and endurance limit beyond 108 cycles at a cycling field amplitude of 3.5 MV cm−1. We use time-of-flight secondary ion mass spectrometry, energy dispersive spectroscopy, and grazing incidence x-ray diffraction to elucidate the origin of enhanced endurance and leakage properties in capacitors with an inserted 1 nm Al2O3 layer. We demonstrate that the use of Al2O3 as a passivating dielectric, coupled with sequential ALD fabrication, is an effective means of interfacial engineering and enhances the performance of ferroelectric HZO devices.
Numerical study of temperature and pressure effect on one dimensional random photonic crystal used as biosensors in the detection of breast cancer cells
Authors: R Lakshmi Thara , P Aruna Priya , Nayak Chittaranjan 
Published: December 2022

Abstract
For the past few decades, investigations of cancer cells were made using periodic/defective-periodic photonic structures. Utilizing the unique properties of a disordered photonic crystal for detecting the bio-analytes is still missing. This work incorporates the opto-biological properties of one-dimensional random photonic systems to design the two differently randomized biosensors for sensing breast cancer cells. These random sensors are differentiated from one another based on their random arrangements and random thicknesses. To obtain efficient outcomes, the thickness of the dielectric layers and sensing layer is optimized. Through the transfer matrix method, the sensing characteristics of the biosensors are investigated for different pressures (0–6 GPa) and temperatures (−125 °C to 25 °C). At the optimal range, the proposed Biosensors I and II, show a high sensitivity of 1372.549 nm/RIU. Among both sensors, Random Biosensor I exhibits a high-quality factor of 12925, a maximum FOM of 4575.163 RIU−1, and a very low detection limit in the order of 5.82857E-06 RIU. The designed sensor is capable of sensing very minuscule changes in the bio-analytes effectually. The proposed biosensor shows high sensitivity than the previous literature even in the normal incident of light.
Kinetic field theory: perturbation theory beyond first order
Authors: Pixius C. , Celik S. , Bartelmann M. 
Published: December 2022

Abstract
We present recent improvements in the perturbative treatment of particle interactions in Kinetic Field Theory (KFT) for inertial Zel'dovich trajectories.
KFT has been developed for the systematic analytical calculation of non-linear cosmic structure formation on the basis of microscopic phase-space dynamics.
We improve upon the existing treatment of the interaction operator by deriving a more rigorous treatment of phase-space trajectories of particles in an expanding universe.
We then show how these results can be applied to KFT perturbation theory by calculating corrections to the late-time dark matter power spectrum at second order in the interaction operator.
We find that the modified treatment of interactions w.r.t. inertial Zel'dovich trajectories improves the agreement of KFT with simulation results on intermediate scales compared to earlier results.
Additionally, we illustrate that including particle interactions up to second order leads to a systematic improvement of the non-linear power spectrum compared to the first-order result.
Hubble WFC3 Spectroscopy of the Terrestrial Planets L 98–59 c and d: No Evidence for a Clear Hydrogen Dominated Primary Atmosphere
Authors: Zhou Li , Ma Bo , Wang Yong-Hao , Zhu Yi-Nan 
Published: December 2022

Abstract
The nearby bright M-dwarf star L 98–59 has three terrestrial-sized planets. One challenge remaining in characterizing atmospheres around such planets is that it is not known a priori whether they possess any atmospheres. Here we report on study of the atmospheres of L 98–59 c and L 98–59 d using near-infrared spectral data from the G141 grism of Hubble Space Telescope (HST)/Wide Field Camera 3. We can reject the hypothesis of a clear atmosphere dominated by hydrogen and helium at a confidence level of ∼3σ for both planets. Thus they could have a primary hydrogen-dominated atmosphere with an opaque cloud layer, or could have lost their primary hydrogen-dominated atmosphere and re-established a secondary thin atmosphere, or have no atmosphere at all. We cannot distinguish between these scenarios for the two planets using the current HST data. Future observations with the James Webb Space Telescope would be capable of confirming the existence of atmospheres around L 98–59 c and d and determining their compositions.
Insulation Test of the Nitrogen Blanket Transformer under Sudden Temperature Drop
Authors: Li Jiansheng , Yang Xiaoping , Wu Yiming , Wang Shengquan 
Published: December 2022

Abstract
During the transformer operation, it is a common condition that the oil temperature decreases due to sudden rainstorms. Because the nitrogen layer is set to contact the transformer oil in the nitrogen blanket transformer directly, the influence of nitrogen dissolution and precipitation on the insulation characteristics is very important. In this paper, the effect of nitrogen is analyzed. First, the electrical field under the nitrogen bubble effect is simulated. Second, the sudden temperature drop situation is developed based on the reformed transformer. Last, the insulation changes are analyzed by partial discharge data. According to the analysis, the sudden temperature drop won’t influence the transformer operation.
Research on a Wireless Temperature Measuring Device Using Inductive Power
Authors: Kou Zheng , Liu TaoWei , Liu XinRong , Yang Yue 
Published: December 2022

Abstract
With the advancement of urban construction, more and more distribution network lines are changed from overhead lines to cable lines. Currently, the distribution network cable connection generally adopts the European or American cable elbow. If the temperature changes inside the cable elbow can be monitored in time, it will help to find the hidden fault of the cable elbow in time and improve the safe operation level of the power grid. In this paper, the online temperature measurement device of distribution network cable is discussed and researched, and a contact-type inductive wireless temperature measurement sensor suitable for the elbow joint of distribution network cable is designed. The sensor not only can accurately measure temperature, but also has the characteristics of a convenient communication network, safe and reliable information, and strong insulation ability, which is suitable for large-scale promotion and application.
Research on dynamic energy optimization strategy of park smart energy system with complementary multi-energy
Authors: Yu Changle , Yang Lin , Qi Penglong , Wan Jia , Zhu Yuanda , Zhang Qingqing 
Published: December 2022

Abstract
The only way to develop a smart grid is to build a smart energy system in the park with coordinated optimization of source, network and load, and flexible interaction. In order to achieve the best operation of the multi-energy complementation of cooling, heating, and electricity in the smart energy system of the park when the output of renewable energy is uncertain, the Latin hyper square sampling method and the synchronous back generation method are used to analyze and model the uncertainty of renewable energy in the system. A model for the optimal operation of the integrated energy system for cooling, heating, and electricity is established. This model considers various demand response measures of controllable load and electric energy storage and considers how source, load, and storage can work together to reduce energy consumption. After conducting a multi-scenario simulation study, it is determined that this approach may significantly boost the park’s operational dependability and economic performance.
A parallel simulation analysis of energy storage converters based on nonlinear inductance modeling
Authors: Wang Jumin , Jia Yanbing , Chen Haijun , Zhu Jianguo , Chen Junxian 
Published: December 2022

Abstract
In order to describe the working conditions of the inverter inductance in actual work more accurately, this paper proposes a simulation model of parallel connection of energy storage converters based on nonlinear inductance modeling. Firstly, the mathematical model of nonlinear inductance based on tan−1 function fitting is introduced, and the equivalent fixed-value inductance model of nonlinear inductance is obtained. Then the suppression method of “PI+R” low-frequency zero sequence circulation is proposed. The simulation results show that the method can suppress low-frequency zero sequence circulation. Finally, the model is established by PLECS, and the method proposed in this paper is verified.
Real-time Scheduling of Virtual Power System Based on the Hidden Markov Model
Authors: Li Bo , Wu Feng , Liu Junjun , Qin Ningli , Zhang Xuedong 
Published: December 2022

Abstract
With the large-scale grid connection of renewable energy, the grid operation gradually presents a new feature of high-order uncertainty, which poses a severe challenge to the security and stability of the system operation. At present, the intelligent degree of dispatching instruction operation is low, and the human-computer interaction is still in the stage of manual operation. In this paper, a virtual power system for real-time power grid scheduling is proposed. Firstly, a grid model is established based on graph theory. Secondly, a GES agent is designed for power grid scheduling decisions. The implementation effect of the strategy is verified by simulation, and the scheduling strategy is sent to the new energy station. The analysis results show that compared with the traditional manual scheduling method, the proposed man-machine scheduling scheme can effectively improve the execution time and accuracy of scheduling, effectively reduce the risk of overload in the power grid, and provide a solution for the man-machine interaction system in the environment of power scheduling.
Modal Analysis of Main Structure of Substation Post-switchgear
Authors: Liu Huibin , Liu Qian , Gao Chunhui , Li Peng , Cheng Yongfeng , Liu Bin , Zhang Xinwei , Li Danyu , Liu Sikai , Huang Huaizhong 
Published: December 2022

Abstract
The main structure of the substation post-equipment is a typical wind-sensitive structure, which is high and flexible. In order to ensure the safety and stability of the structure, it is necessary to conduct a modal analysis of the main structure of the substation post equipment, which in turn provides a basis for the analysis of wind vibration characteristics of the structural system. This paper analyzes the self-oscillation frequency and vibration pattern of the main structure of a substation in Inner Mongolia based on ABAQUS, compares them with the measured wind response modal results to verify the reliability of the numerical simulation results and finds that the low-order natural frequency of the main structure of the substation pillar-type equipment is between 0-2 Hz, and the frequency in the opening state is lower than the state of closing soon.
Vulnerability Detection System for Power Information Based on Network Traffic Identification Technology
Authors: Luo Fucai , Xie Jingyi , Guo Jingdong , Liu Wenliang , He Jindong , Zhang Hang 
Published: December 2022

Abstract
A power information vulnerability detection system has the problem of a low network survival rate. Therefore, a power information vulnerability detection system based on network traffic identification technology is designed. In the hardware part, the memory is configured as a synchronous interface and 4 DRAMs, and the level input and output power of the chip are kept in a state compatible with LVTTL levels; in the software part, the power information network indicators are obtained, the importance of network elements is reflected through a mesoscope, the failure characteristics of components are extracted using network traffic identification technology, a critical area is delineated, and the port protocols and association libraries of the passages are matched to optimize the system vulnerability detection function. Through analysis of the simulation results, it can be obtained that the network survival rate of the power information vulnerability detection system in this paper is 17.657% and 17.931% higher than that obtained by the other two power information vulnerability detection systems, respectively, indicating that the designed power information vulnerability detection system is more effective when fully integrated with network traffic identification techniques.
Simulation analysis of VSC reactive power compensation device
Authors: Wang Xuejie , Ye Peng , Zhao Yi , Sun Guangyan , Qi Lei , Zhang Huiming , Wu Siyi , Jiang Longyuan 
Published: December 2022

Abstract
Reactive power compensators based on three-phase voltage source converters continuously absorb and output adjustable reactive power. The mathematical model of the three-phase voltage source converter in a direct quadrature (DQ)-frame is analyzed. A decoupling method of the DC-side voltage and reactive power is designed through the state feedback linearization controlling strategy in non-linear differential geometry theory, and the PI controller parameters are set. Finally, the control method is verified effectiveness by Electromagnetic transient simulation software PSCAD/EMTDC. Simulation results show that the developed control method possesses better steady-state and dynamic behavior. The power factor of the compensation point is improved significantly.
Harmonic characteristics of HVDC transmission system and its suppression method system
Authors: Yunfeng Zheng , Xiaobin Li , Haoyu Huang 
Published: December 2022

Abstract
In this paper, firstly, the generation of characteristic harmonics and non-characteristic harmonics, the content of each harmonic and its amplitude varying with the frequency of HVDC converter are analyzed theoretically, then, the harm of harmonics to HVDC transmission lines is introduced, and some restraining measures are put forward, such as increasing converter pulsation number, installing and improving AC filter to suppress the generation of specific frequency harmonics and reduce their amplitude, so as to increase the stability of the system. Secondly, through simulation based on PSCAD/EMTDC, it is verified that 6K±1 harmonics (where K is odd) can be eliminated by increasing the converter from 6 to 12 pulsations, so as to reduce the harmonic content of transmission lines. Finally, a simulation model is built to verify that the harmonic amplitude of 12K±1 (K is a positive integer) is greatly reduced when the hybrid tuning filter is installed at 12 pulsations.
Seismic Isolation and Reinforcement of Main Transformer in Substation
Authors: Lu Zhicheng , Gao Po , Wang Jianxun , Sun Yuhan 
Published: December 2022

Abstract
Due to the inadequate seismic capacity of the equipment in the substation, once the earthquake happens, the equipment takes the lead to collapse extremely. The interruption of power supply in the earthquake zone has caused great difficulties in the subsequent rescue efforts. Learning from the experience of seismic isolation in the construction industry and the features of the power equipment, this paper puts forward the seismic isolation and reinforcement method for the main transformer equipment in the built-up substation. Through the isolation design and analysis for the main transformer equipment in a particular project, the result shows that the isolation coefficient is about 0.4. In other words, the seismic energy transmitted to the main transformer equipment will be reduced by about 60% after adopting the seismic isolation and reinforcement methods, and the overall seismic capacity of the equipment will be significantly improved. After determining the isolation design scheme, the construction process of the overall isolation strengthening transformation is put forward. Combined with the specific engineering project, the isolation-strengthening transformation of the overall project is completed according to the corresponding construction process, the power is delivered successfully and the operation is carried out safely.
An Improved Under-Voltage Load-Shedding Control Scheme for Power Network Based on Mean Spectral Radius Method
Authors: Qi Xiaoguang , Zhang Qianmao , Zhao Kailin , Li Huiling , Li Lixin , Chen Changsheng 
Published: December 2022

Abstract
Under-voltage load-shedding (UVLS), which executes load shedding round by round, is one of the most effective ways to solve the under-voltage problem. However, the traditional UVLS has the problems of large load shedding and slow voltage recovery. To tackle these problems, this paper proposes an improved UVLS based on the mean spectral radius method (MSR). Firstly, the MSR of the power network is constructed by building a high-dimensional random matrix. Secondly, the voltage vulnerability of the power system is identified by building the voltage weak evaluation index based on MSR. And then, an improved UVLS control scheme is proposed based on the voltage vulnerability. Finally, the effectiveness of the proposed UVLS is validated in the IEEE 10-generator 39-node power system. The proposed UVLS has the advantages of less load shedding, better economy, and fast voltage recovery.
Research on Sliding Mode Observer of MMC Capacitor Voltage
Authors: Wu Shidan , Sheng Yifa 
Published: December 2022

Abstract
In the practical application of modular multilevel converters (MMC), with the improvement of voltage level and power, more submodules (SMs) need to be cascaded in order to obtain more levels with different amplitudes to approximate the sinusoidal output voltage. The acquisition of submodule capacitor voltage is the premise of MMC capacitor voltage control, which makes the MMC system need many sensors to monitor sub-module capacitor voltage. In order to reduce the number of sensors and weaken the system jitter, this paper collects the current signal of the MMC bridge arm combined with the switching signal of the submodule and uses the saturation function set as the switching function of the sliding mode observer (SMO) to estimate the capacitor voltage. The simulation results show that the sliding mode observer has good robustness and accuracy.
Towards Inspection and Cleaning on Capacitor Towers: Design and Implementation of Multi-task Operation Robot
Authors: Tang Xin , Liao Jianbin , Liu Liangyu , Yan Yu , Xiao Yi , Wang Lide 
Published: December 2022

Abstract
Capacitors work in harsh environments, including strong electric fields, strong mechanical stress, and drastic weather changes for a long time. Solid, liquid, and gaseous dirt particles will be deposited on the surface of the electrical outer insulations, the electrical strength of the capacitor will be greatly reduced, and the health condition of the capacitor tower will deteriorate under the effect of harsh weather conditions, such as fog, dew, drizzle, and melting ice (snow). Based on the importance of the safe operation of substations, it is necessary to regularly evaluate the health condition of capacitors and complete operational tasks such as insulator cleaning, bolt tightening, and capacitance measurement. Considering the above situation and needs, we propose a solution of inspection and maintenance robot for capacitor towers in high-voltage substations by using automatic and intelligent technology to complete the above-mentioned tasks efficiently and reliably instead of manual work.