bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dielectric engineering for improvement of mobility and photoelectric performance in 2D BiI3
Authors: Yu He , Gao Wei , Huang Ying , Wen Peiting , Wang Dan , Shao Libo , Liu Zihao , Wu Jing , Wang Hanyu , Yang Yujue , Li Jingbo , Huo Nengjie 
Published: May 2022

Abstract
Two-dimensional (2D) bismuth triiodide (BiI3) has been emerging as a potential layered material for optoelectronic applications due to its air stability and high atomic density. Although much effort has been devoted to improvements of carrier mobility, conductivity and photoelectric response, performance is still very limited. Here, we report a simple and scalable strategy for greatly improving the electrical and optical properties of 2D BiI3 through high-κ dielectric engineering. Upon covering with a high-κ dielectric oxide (Al2O3), air isolation and dielectric screening effects can lead to the reduction of the contact barrier, passivation of trap states, and suppression of Coulomb scattering. As a result, BiI3-based phototransistors can increase carrier mobility by three orders of magnitude and improve photoresponsivity by three orders of magnitude up to 8.05 × 103 A W−1. This work develops a new 2D BiI3 material and efficient dielectric engineering for improving mobility and photoelectrical performance, expanding the family of 2D materials and offering a promising strategy for potential nano-device applications.
Kerr and Faraday rotations in topological flat and dispersive band structures
Authors: Habibi Alireza , Musthofa Ahmad Z , Adibi Elaheh , Ekström Johan , Schmidt Thomas L , Hasdeo Eddwi H 
Published: May 2022

Abstract
Integer quantum Hall (IQH) states and quantum anomalous Hall (QAH) states show the same static dc response but distinct dynamical ac response. In particular, the ac anomalous Hall conductivity profile σ

yx
(ω) is sensitive to the band shape of QAH states. For example, dispersive QAH bands shows resonance profile without a sign change at the band gap while the IQH states shows the sign change resonance at the cyclotron energy. We argue by flattening the dispersive QAH bands, σ

yx
(ω) should recover to that of flat Landau bands in IQH, thus it is necessary to know the origin of the sign change. Taking a topological lattice model with tunable bandwidth, we found that the origin of the sign change is not the band gap but the van Hove singularity energy of the QAH bands. In the limit of small bandwidth, the flat QAH bands recovers σ

yx
(ω) of the IQH Landau bands. Because of the Hall response, these topological bands exhibit giant polarization rotation and ellipticity in the reflected waves (Kerr effect) and rotation in the order of fine structure constant in the transmitted waves (Faraday effect) with profile resembles σ

yx
(ω). Our results serve as a simple guide to optical characterization for topological flat bands.
One-dimensional acoustic potential landscapes guide the neurite outgrowth and affect the viability of B35 neuroblastoma cells
Authors: Baumgartner Kathrin , Mauritz Sophie C F , Angermann Sebastian , Brugger Manuel S , Westerhausen Christoph 
Published: May 2022

Abstract
On the way towards neuronal stimulation and signalling, standing surface acoustic waves (SSAWs) have become a widely used technique to create well-defined networks of living cells in vitro during the past years. An overall challenge in this research area is to maintain cell viability in long-term treatments long enough to observe changes in cellular functions. To close this gap, we here investigate SSAW-directed neurite outgrowth of B35 (neuroblastoma) cells in microchannels on LiNbO3 chips, employing one-dimensional pulsed and continuous MHz-order SSAW signals at different intensities for up to 40 h. To increase the efficiency of future investigations, we explore the limits of applicable SSAW parameters by quantifying their viability and proliferation behaviour in this long-term setup. While cell viability is impaired for power levels above 15 dBm (32 mW), our investigations on SSAW-directed neurite outgrowth reveal a significant increase of neurites growing in preferential directions by up to 31.3% after 30 h of SSAW treatment.
cgRNASP-CN: a minimal coarse-grained representation-based statistical potential for RNA 3D structure evaluation
Authors: Song Ling , Yu Shixiong , Wang Xunxun , Tan Ya-Lan , Tan Zhi-Jie 
Published: May 2022

Abstract
Knowledge of RNA 3-dimensional (3D) structures is critical to understand the important biological functions of RNAs, and various models have been developed to predict RNA 3D structures in silico. However, there is still lack of a reliable and efficient statistical potential for RNA 3D structure evaluation. For this purpose, we developed a statistical potential based on a minimal coarse-grained representation and residue separation, where every nucleotide is represented by C4’ atom for backbone and N1 (or N9) atom for base. In analogy to the newly developed all-atom rsRNASP, cgRNASP-CN is composed of short-ranged and long-ranged potentials, and the short-ranged one was involved more subtly. The examination indicates that the performance of cgRNASP-CN is close to that of the all-atom rsRNASP and is superior to other top all-atom traditional statistical potentials and scoring functions trained from neural networks, for two realistic test datasets including the RNA-Puzzles dataset. Very importantly, cgRNASP-CN is about 100 times more efficient than existing all-atom statistical potentials/scoring functions including rsRNASP. cgRNASP-CN is available at website: https://github.com/Tan-group/cgRNASP-CN.
The anti-Fermi–Pasta–Ulam–Tsingou problem in one-dimensional diatomic lattices
Authors: Feng Sihan , Fu Weicheng , Zhang Yong , Zhao Hong 
Published: May 2022

Abstract
We study the thermalization dynamics of one-dimensional diatomic lattices (which represents the simplest system possessing multi-branch phonons), exemplified by the famous Fermi–Pasta–Ulam–Tsingou (FPUT)-β and the Toda models. Here we focus on how the system relaxes to the equilibrium state when part of highest-frequency optical modes are initially excited, which is called the anti-FPUT problem comparing with the original FPUT problem (low frequency excitations of the monatomic lattice). It is shown numerically that the final thermalization time T
eq of the diatomic FPUT-β chain depends on whether its acoustic modes are thermalized, whereas the T
eq of the diatomic Toda chain depends on the optical ones; in addition, the metastable state of both models have different energy distributions and lifetimes. Despite these differences, in the near-integrable region, the T
eq of both models still follows the same scaling law, i.e. T
eq is inversely proportional to the square of the perturbation strength. Finally, comparisons of the thermalization behavior between different models under various initial conditions are briefly summarized.
Intelligent Fault Diagnosis with Multi-scale Convolutional Dense Network
Authors: Li Xinyu , Lei Zihao , Wen Guangrui , Huang Xin , Chen Xuefeng , Cheng Changming , Peng Zhike 
Published: May 2022

Abstract
With the continuous development of artificial intelligence technology, intelligent fault diagnosis approaches have been successfully developed and achieved promising performance in recent years. However, in the existing methods, the time domain characteristics of the signal are first ignored in the process of network construction, and at the same time, it is less considered in the aspects of multi-scale feature extraction and feature fusion. In order to solve the above problems, a multi-scale convolutional dense network (MCDN) was established. Specifically, the proposed framework mainly includes three parts, among which the multi-scale feature pre-extraction module is used to extract multi-scale features, the dense connection module is used to achieve effective feature fusion, and the classification module realizes the recognition of different failure modes. To verify the performance of MCDN for fault diagnosis, rolling bearing data sets gathered from Xi’an Jiao Tong University (XJTU) are employed and analyzed. The analysis result confirms that the proposed method can achieve superior performance compared with other latest methods under varying degrees of noise.
Aerodynamic Study of Canard Parameter Configuration Principle for UAV
Authors: Jiang Feng , Tong Xiaoyan , Sun Jing , Zhang Suwen , Deng Jianzhi 
Published: May 2022

Abstract
This paper analyses the multi-objective design requirements of UAV with high timeliness, high manoeuvrability and long-endurance long-range flight capability. Then put forward an aerodynamic configuration conception of wide flight envelope that can perform multi-tasks, such as fast approach, long endurance patrol and critical maneuvering. By means of wind tunnel test, the aerodynamic characteristics regularities of this configuration changed by shape parameters, component combination and spatial relationships are studied. Base on analysing the flow coupling efficiency of canard vortex and wing vortex, proposed the principle of relative position matching between canard and wing. The results show that when the canard was higher than the wing, the canard vortex provided additional vortex lift on the upper surface of the wing, which could provide a favorable influence in the cruise phase. Further more, using the trapped vortex of variable curvature lip on nose which was similar to the influence mechanism of canard vortex, a stable favorable interference vortex system in a wide envelope could be obtained, and the components and controlling complexity of this aircraft configuration would be simplified.
Numerical Study on Infrared Radiation Characteristics of Dual-Engine Fighter Based on RMCM
Authors: Rui Wang , Qingzhen Yang , Kai Du 
Published: May 2022

Abstract
The study of the infrared radiation characteristics of dual-engine fighters provides theoretical support for the stealth design of future fighters. This paper takes a dual-engine fighter as the research object and uses the Reverse Monte Carlo Method (RMCM) to carry out the numerical simulation of its infrared radiation characteristics. The results show that: in the 3-5μm band, with the Mach number increasing, the peak infrared radiation intensity increases, and the solid radiation accounts for about 90% of the total radiation at a detection angle of 180°; in the 8-14μm band, the infrared radiation intensity is distributed in the shape of "8". When the Mach number increases, the infrared radiation intensity of the abdomen of the fuselage is higher than that of the back.
Model predictive control for automatic carrier landing considering ship motion
Authors: Ruiyang Zhou , Neusypin K. A. 
Published: May 2022

Abstract
This paper studies a control problem of UAV automatic landing on carrier considering carrier heave motion, which is given by an empirical model based on spectral density function. A linearized UAV dynamics model is applied as the predictive model, a MPC controller is then proposed for the flight dynamics control. Simulation is conducted with real parameters of the UAV “Silver Fox”, the results exhibit the great landing performance of MPC method.
Optimal Design of Wind Turbine Blades by Combination of Multi-airfoil Leaf Elements
Authors: Xi Lei , Zhao Lihua 
Published: May 2022

Abstract
This paper takes the blades of a large horizontal axis wind turbine as the research object, selects NACA series airfoil elements for combination, arranges and distributes them according to the thickness and curvature of each airfoil, and generates a new blade that is different from a single airfoil. The aerodynamic performance of the two blades was compared and analyzed by using Qblade software to verify the effectiveness of the method, and the wind energy utilization rate was improved while ensuring the strength of the blade roots.
A Numerical Simulation Study for A Dual Thrust Solid Propellant Rocket Motor Nozzle
Authors: AbdelGawad Alaa R , Guozhu Liang 
Published: May 2022

Abstract
CFD simulation through the rocket motor nozzle is an important issue as it gives a better understanding of the flow behavior and shows the evolution of the parameters along with the nozzle. CFD simulations using ANSYS FLUENT were conducted to model the flow through an experimental dual thrust solid rocket motor nozzle at two pressure values representing the two pressure levels. A two-dimensional axisymmetric numerical simulation was carried out using a pressure-based solver to solve the governing equation and the standard k-ε model to model the turbulence through the motor nozzle. The hot gas properties used in the simulation model were calculated using the CEA software (chemical equilibrium with applications). The parameters marched out from simulations were used to calculate the thrust values for each case. The results calculated through the numerical models compared with the experimental measurements and showed an acceptable level of accuracy.
The attitude control optimization of small rocket
Authors: Ni Runfeng , Wen Chunyu , Jia Linhai , Zhang Yao , Liu Shiyu 
Published: May 2022

Abstract
In this article, an optimization method for attitude calculation and vector control of small rocket is proposed, which reduces the performance requirements and costs of gyroscopes. Dynamic model parameters such as engine thrust curve and rocket body moment of inertia are added to the traditional filtering and control algorithm, which can reduce the hardware performance requirements of sensors and the cost of rocket control system. This method has achieved good results in the test, and is of great significance for the promotion of small rockets.
Analysis of orbit error effect on ultra-high space-ground two-way time comparison
Authors: Guo Yanming , Bai Yan , Gao Shuaihe , Zou Decai , Chen Xiaofeng , Wang Rong , Liu Yinhua , Gao Yuping , Lu Xiaochun 
Published: May 2022

Abstract
In view of the characteristics of the low-orbit spacecraft's orbit, the influence of the low-orbit spacecraft's orbit error on the time comparison method based on tri-frequency is theoretically analyzed. With the simulation and test, validing the effectiveness of the precise two-way time comparison method, and the accuracy of the method can reach the order of ps-level. Furthermore, with the simulated data, the influence of orbit error on the ultra-high precise space-ground time comparison is analyzed. The results show that the percentage of orbit noise in the total orbit error has a great influence on the accuracy of time comparison. In order to achieve a link accuracy better than ps, the percentage of orbit noise should be kept within 5%.
Application and development of MBSE in aerospace
Authors: Wenyue Wang , Junjie Hou , Yinxuan Mao , Jinjie  , Zhiang Lu 
Published: May 2022

Abstract
MBSE (Model-Based Systems Engineering), as the representation of digital technology, has achieved effective management of system complexity through model-centric means, and a state of coordination and matching with modern complex engineering systems. On the basis of introducing the background of MBSE and the overview of MBSE practice in the aerospace field, two typical application cases of MBSE in the domestic and foreign were analyzed. In order to provide reference for the application of MBSE in the aerospace field, suggestions and conclusions on the development of MBSE application in China were put forward: the integration of traditional development process and MBSE method, the consistency understanding of system model, and the integration ability of system model and domain model.
Energy Release Study of Reaction Fragment in Dynamic Loads
Authors: Wang Zhanlei , Xu Longtao 
Published: May 2022

Abstract
Al-W-KClO3 is a kind of metastable reactive composite material, which belongs to multi-functional energetic structure material. Its energy release characteristic under dynamic loading was studied in this paper. The Al-W-KClO3 powder of different components was first pressed to study their forming ability. The Al-W-KClO3 powders of four different molar ratios were moulded into approximate hemispherical liner on a basis of fine formability. The reaction energy releasing characteristics of reactive fragments were researched under the dynamic loads. The steel target was penetrated by the four kinds of reactive fragments, respectively in a high detonation velocitiy and low one, then the effect of penetrating was also analyzed. The result showed that the energetic materials of Al-W-KClO3 could maintain a fine formability and a fine reaction-energy release property at certain ratio of constituents.
Study on Vibration Damping Performance of Composite Crankshaft Torsional Vibration Damper
Authors: Zhao Xuesong , Fang Min , Gao Haowen 
Published: May 2022

Abstract
In order to reduce the crankshaft vibration’s impact on the performance and working life of the vehicle engines, using silicone oil and damping properties of rubber, designed a silicone, rubber compound crankshaft vibration damper that required the actual demand. Determined the silicone oil shock absorber and rubber vibration isolator in the main performance parameters of the design process; completed the main structure size design; calculated the silicone oil shock absorber in the motor rated power as 92 kw, the rated speed as 2200 r/min, the torque value and excitation frequency and crankshaft maximum amplitude under the condition that the crankshaft excitation frequency as 1927.2 r/s. Determined the damping value of the optimum damping point during working time was Cd=93.66 Nms/rad, drew the crankshaft resonance curve of silicone oil shock absorber, calculated torque value frequency and the maximum crankshaft amplitude of the rubber vibration isolator under specific working condition, determined the optimum damping point and damping value as Cr=0.3158 Nms/rad while vibration isolator was working, mapped crankshaft resonance curve of the rubber vibration isolator; calculated the optimum damping points of the combined crankshaft torsional vibration, constructed the resonance frequency test bed of the compound torsion damper, inspected resonance frequency value and its corresponding swing value. It has been proved that after installing the compound torsion damper, the amplitude value of the crankshaft reduced about 81%, much lower than that before installation, which had significant effect, and meeted the design requirements.
Design of Vibrating Screen Separation Equipment for Powder Materials
Authors: Wei Yanbiao , Tao Chong , Zheng Lei , Huang Mingyu 
Published: May 2022

Abstract
The vibrating screen has absolute advantages in the sorting equipment due to its simple structure, reliable operation and large processing capacity. Therefore, the vibrating screen is widely used in powder material sorting equipment. Because powder materials usually contain a certain amount of moisture, high-frequency vibration can effectively separate materials with different particle sizes, and together with the feeding and unloading of the belt conveyor, it forms a sorting device. This article mainly includes the calculation of the feeding conveyor mechanism, the calculation of the sieve plate size selection, the calculation of the entire vibration screening mechanism and the calculation of the unloading conveyor mechanism. In addition, the strength and fatigue strength of the key parts of the equipment are checked, and the installation and use of the equipment are explained in detail.
Design and Analysis of a New Column Vane Hydraulic Pump Based on Computer Aided Design
Authors: Cheng YiQi , Wang XinHua , Chen YingChun 
Published: May 2022

Abstract
A new model of column vane hydraulic pump is discussed. Firstly, taking the stator surface as the research object, the equation of the stator surface is established based on the applied triangular space theory. MATLAB and Pro/E software were used to establish the three-dimensional model of column vane hydraulic pump.In the second part, the structural characteristics of the pump are described in detail, the working principle of the pump is analyzed, and the correctness of the stator equation is verified. Secondly, on the basis of describing the structural characteristics of the cylinder pump, the working principle of the new cylinder pump is analyzed. Finally, COMSOL Multiphysics is used to visualize the flow field and analyze the fluid-structure interaction. The results show that the working principle of the new hydraulic pump is reasonable, the flow field diagram of the pump is relatively uniform and the deformation is small under the design condition.
Research and Implementation of Multi Axis System with Macro Instruction
Authors: Chen Longcan , Chao Xiaojie 
Published: May 2022

Abstract
In the current industrial field control, most of the servo control systems communicate with the motion controller and the servo driver, and if the industrial site needs to modify the parameters of the servo system in time according to the requirements of the processing technology, the modification of the parameters becomes very inconvenient, and you need to enter the system to change the parameter values. In order to solve this problem, a kind of macro instruction based on touch screen is introduced to realize the multi axis servo in the industrial field. The system reads and sets, uses the communication mode of Modbus RTU protocol and RS-485, thus realizes the simultaneous reading and writing of the multi axis system, introduces the Modbus RTU communication function of the Weinview touch screen and the communication function with the Panasonic servo driver in more detail, and gives a kind of macro instruction based on the Weinview touch screen. The implementation of a multi axis control system. The detailed design plan and process of the system are introduced, which can also provide reference and reference for the design and application of similar systems.
Design of Airborne Hyperspectral Automatic Filling Device for Liquid Nitrogen Refrigeration
Authors: Han Yachao , Li Jing , Gao Zihong , Chen Jie , Nie Zhiyang 
Published: May 2022

Abstract
To maintain sensitivity of the sensor, especially the infrared band sensor, liquid nitrogen is needed for cooling during the imaging process of airborne hyperspectrometer. However, traditional filling process requires a lot of manual intervention, which is not only time-consuming and labor-intensive, but also creates great potential safe hazard during aviation operations. In view of this, this paper designs an airborne hyperspectral automatic filling device for liquid nitrogen using time-delay electromagnetic switch, pressure sensing detector and electromechanical device, which achieves the purpose of automatic liquid nitrogen filling, increases operation efficiency of airborne hyperspectral equipment, reduces air stage operation steps, and guarantees personal safety of air operators, thus playing a good demonstration role in further standardizing and optimizing the technical process of air-borne hyperspectral remote sensing data.
Numerical Simulation of Flow Field Structure of Flashboard Distortion Generator
Authors: Wu Zheng-gang , Zhang Tao , Cai Wen-xiang , Chen Xiong 
Published: May 2022

Abstract
In order to accurately analyze the characteristics of flashboard distortion generator, flow field with different structure and aerodynamic parameters was studied by numerical simulation.Then distribiton of Mach on the AIP interface behind the flashboard was analyzed, so as to guide the experiment design of the flashboard distortion generator. The results show that Mach distribution on the AIP interface is basically divided into three obvious regions. Mach transitions from high Mach to low Mach is in a small area. The average Mach of AIP interface increases slowly with the total pressure increasing, and decreases sharply with the increase of inserted depth. The angular vortex structure formed in the corner area where the flashboard meets the shell would extend downstream, so it is necessary to study the influence of angular vortex on compressor stability boundary.