bluuebunny/crossref_metadata_2025_split huggingface dataset:
Absorptive/transmissive frequency selective surface with multiple transmission zeros for reduced transition bandwidth
Authors: Deng Lianwen , Fang Shuguang , Zhang Pin , Liu Yawen , Huang Shengxiang , Qiu Leilei 
Published: June 2023

Abstract
An absorptive/transmissive frequency selective surface (ATFSS) with multiple transmission zeros is proposed, which consists of one lossy layer and two lossless layers separated by air space. As the key features, the slot-line loading and interlayer coupling technologies are adopted in the lossy layer and lossless layers, respectively, to introduce the infinite impedance points and four transmission zeros, thereby simultaneously achieving low insertion loss and high selectivity of the transmission band. Benefiting from the ohmic loss of the lumped resistance in the lossy layer, effective absorption can be readily implemented. A detailed qualitative analysis of the proposed structure is presented through the equivalent circuit theory, surface current, and power loss density distributions. Under normal incidence, the overall structure exhibits two discrete absorption bands over the frequency range of 6.34 to 13.40 GHz, whereas a transmission behavior is obtained from 9.34 to 11.40 GHz with a minimum insertion loss of only 0.14 dB. In particular, there are only 3.9% and 3% transition bandwidths between absorption and transmission functions. Then, a sample prototype is fabricated for demonstration, and the measured results are well consistent with the simulated one. As expected, the proposed ATFSS has the advantage of multiple transmission zeros, loss insertion loss, and narrow transition band, which is of great potential in the application of radar stealth radome.
Interaction solutions for the (2+1)-dimensional extended Boiti–Leon–Manna–Pempinelli equation in incompressible fluid
Authors: Ma Hongcai , Mao Xue , Deng Aiping 
Published: June 2023

Abstract
This paper aims to search for the solutions of the (2+1)-dimensional extended Boiti–Leon–Manna–Pempinelli equation. Lump solutions, breather solutions, mixed solutions with solitons, and lump-breather solutions can be obtained from the N-soliton solution formula by using the long-wave limit approach and the conjugate complex method. We use both specific circumstances and general higher-order forms of the hybrid solutions as examples. With the help of maple software, we create density and 3D graphs to summarize the dynamic properties of these solutions. Additionally, it is possible to observe how the solutions’ trajectory, velocity, and shape vary over time.
A guide towards optimal detection of transient oscillatory bursts with unknown parameters
Authors: Cho SungJun , Choi Jee Hyun 
Published: June 2023

Abstract

Objectives. Recent event-based analyses of transient neural activities have characterized the oscillatory bursts as a neural signature that bridges dynamic neural states to cognition and behaviors. Following this insight, our study aimed to (1) compare the efficacy of common burst detection algorithms under varying signal-to-noise ratios and event durations using synthetic signals and (2) establish a strategic guideline for selecting the optimal algorithm for real datasets with undefined properties. Approach. We tested the robustness of burst detection algorithms using a simulation dataset comprising bursts of multiple frequencies. To systematically assess their performance, we used a metric called ‘detection confidence’, quantifying classification accuracy and temporal precision in a balanced manner. Given that burst properties in empirical data are often unknown in advance, we then proposed a selection rule to identify an optimal algorithm for a given dataset and validated its application on local field potentials of basolateral amygdala recorded from male mice (n=8) exposed to a natural threat. Main Results. Our simulation-based evaluation demonstrated that burst detection is contingent upon event duration, whereas accurately pinpointing burst onsets is more susceptible to noise level. For real data, the algorithm chosen based on the selection rule exhibited superior detection and temporal accuracy, although its statistical significance differed across frequency bands. Notably, the algorithm chosen by human visual screening differed from the one recommended by the rule, implying a potential misalignment between human priors and mathematical assumptions of the algorithms. Significance. Therefore, our findings underscore that the precise detection of transient bursts is fundamentally influenced by the chosen algorithm. The proposed algorithm-selection rule suggests a potentially viable solution, while also emphasizing the inherent limitations originating from algorithmic design and volatile performances across datasets. Consequently, this study cautions against relying solely on heuristic-based approaches, advocating for a careful algorithm selection in burst detection studies.
Mechanical properties analysis of carbon fiber composite bond-rivet hybrid joints of maglev train body in different service environments
Authors: Qu Liyuan , Tian Aiqin , Xin Yanming , Su Chao , Wang Di , Xi Yue , Chang Zongyu 
Published: June 2023

Abstract
Carbon fiber reinforced composites have the advantages of high specific strength and stiffness, which are widely used in rail vehicles. As one of the most commonly used connection forms for maglev train bodies, it is important to ensure the strength and reliability of the joint under different temperatures. Therefore, the paper takes the perspective of carbon fiber composites in the lightweight application of high-speed train bodies. The optimal geometric parameters (end-diameter ratio e/D, width-diameter ratio w/D) of the bond-rivet hybrid joint connection are investigated. The influence laws on structural strength and load-bearing failure forms are found under typical temperatures such as room temperature environment, high-temperature environment, and alternating high and low-temperature environment. Failure specimens and tensile load-displacement curves were analyzed. At the three-room temperatures, the joint structure with an end-diameter ratio e/D of about 3:1 and a width-diameter ratio w/D of about 6:1 had the highest strength, and the failure form was the ideal extrusion damage around the nail hole. The high-temperature environment has little effect on the overall load-bearing capacity of the connected structure in a short period, but it changes the morphology of the adhesive layer. The structure is more prone to shear and peel failure of the adhesive layer. The strength of the alternating high and low-temperature treated joints is slightly higher than that of the untreated specimens when tensile at room temperature. The epoxy resin and carbon fibers are more closely fitted by the environment, enhancing the ability of the composite laminate to withstand tensile and torsional loads.
Fabrication and properties of n-SiO2/m-SiO2/PU superhydrophobic coatings
Authors: Dong Kai , Xue Zhihong , Dong Yanwu , Lu Ziqiang , Guan Zhong , Duan Yuping , Wang Hongxia 
Published: June 2023

Abstract
In order to eliminate the adverse effects of icing on the surface of mechanical devices such as power transmission cables and wind turbine blades due to low temperature, nano-silica (n-SiO2) and micron-silica (m-SiO2) modified by silane coupling agent were blended with a mass ratio of 5:1 and subsequently compounded with polyurethane (PU) to obtain n-SiO2/m-SiO2/PU superhydrophobic coatings. It is shown that the tight bonding of m-SiO2 with PU avoids the cracking of the coating due to the agglomeration of n-SiO2 and improves the stability of the coating. n-SiO2 makes the surface of n-SiO2/m-SiO2/PU coating form a dense and rough structure, which increases the air-liquid contact area by trapping more air. The contact angle reached 158.10° at a low filling ratio(40 wt%), indicating that the prepared n-SiO2/m-SiO2/PU coating has excellent superhydrophobic properties. The superhydrophobic n-SiO2/m-SiO2/PU coating is very helpful in solving the low-temperature icing problem of outdoor power and wind equipment in rain and snow.
Mechanical Properties and Microstructure of Mechanical Sand Concrete at High Temperature based on Electron Microscopy
Authors: Song Siyu , Tang Zhongbo , Zhang Jiayuan , li Hao , Yang Xiujiang , Liu Hai 
Published: June 2023

Abstract
For sustainable development, sand-mixed concrete has been paid more and more attention by researchers. In order to study the mechanical properties of sand-gravel concrete, five temperature levels of natural cooling and water cooling were considered, and the mechanical properties of sand-stone concrete after high temperature were tested.. In order to study the mechanical properties of desert sand concrete after high temperature, this paper designs a single factor test with the replacement rate of desert sand as the variable. Five temperature levels are considered, and natural cooling and watering cooling are adopted to test the mechanical properties of desert sand concrete after high temperature. The influences of temperature, desert sand replacement rate, cooling method and fly ash content on compressive strength, axial compressive strength and static compressive elastic modulus of desert sand concrete after high temperature were analyzed, and the deterioration model of strength and elastic modulus of desert sand concrete after high temperature was established. From high temperature post-voltage voltage specimen sampling, X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) observation, from the micro level desert sand concrete after high temperature macro performance deterioration mechanism to explain.
The Reconstruction Scheme of Inland Port Shore Power Construction
Authors: Kang Zhongfei , Du Wei , Tian Teng 
Published: June 2023

Abstract
In response to the “carbon peak and carbon neutral strategy”, inland ports need to vigorously promote the construction and transformation of shore power facilities, and promote 100% shore power coverage and access. At present, the existing shore power facilities have problems such as inconsistent interfaces, mismatched capacity, backward billing methods, etc., which need to be further improved to make them work normally. The paper puts forward three kinds of shore power equipment transformation schemes, and provides two kinds of shore power billing management system construction schemes according to the different on-site environments, effectively promoting the use of port power facilities, and achieving the goal of “all should be connected”.
Countermeasure of Local Scour around Offshore Wind Power Piles
Authors: Qian Wangfeng 
Published: June 2023

Abstract
By using the CFD (Computational Fluid Dynamics) software, the RNG (Renormalization Group) turbulence model and the mud shield module are employed to establish a three-dimensional mathematical model of scouring around a wind power pile foundation. The model reliability is verified by literature results. A new wind power pile foundation protection method is proposed. The thickness of the diaphragm protective layer is 0.5 cm, 1 cm, 2 cm, 4 cm, 6 cm, 8 cm, and 10 cm. Through the numerical simulation results, the protective effect is invalid when the thickness of the protective layer is small, however, after the thickness of the protective layer exceeds a certain value, the local scouring is more significant.
Analysis and optimization of temperature measurement distance on the infrared temperature measurement accuracy of a building envelope
Authors: Fang Zhicheng , Wang Wanjiang 
Published: June 2023

Abstract
Due to the measuring distance, there are variable degrees of temperature measurement differences when infrared temperature monitoring technology is employed to take the temperature of a building envelope, which can directly lead to distortion in the detection of the building envelope temperature. In order to address this issue, temperature data from 20 sets of different measurement locations were acquired through field testing analyzing the building envelope and the interior latex-painted wall. By fitting polynomials to the temperature error and distance curves, a model of the temperature-distance compensation function was produced. According to the results, it is possible to precisely estimate the temperature of latex-painted interior walls at a distance of 0.25 meters using an instrument. The temperature-distance compensation model is executed as the measurement distance increases, resulting in a maximum error rate of 1% for temperature readings after compensation. Before adjustment, the error rate in measuring temperature was 4.9%; after adjustment, it is 3.9%.
Optimal Control of VAV Air Conditioning Terminal in the Polar Cruise Public Area
Authors: Jiang Lu 
Published: June 2023

Abstract
As a key system to ensure residential comfort, the control mode of the polar cruise air conditioning system directly relates to the comfort of the cabin environment and the economy of ship operation. Aiming at the characteristics of uncertainty and regulation time delay in the load change of the VAV air conditioning system in the public area of polar cruise ships, this paper models the mechanism of the VAV terminal system and conducts simulation experiments on the Matlab/Simulink simulation platform. By comparing the difference between the traditional PID control strategy and the fuzzy PID control strategy in the control effect, it provides a reference for the optimal control of the polar cruise air conditioning system.
High-precision clock research based on comparator delay characteristics with temperature
Authors: Huang Yuliang , Yang Jianhong 
Published: June 2023

Abstract
Accuracy is an important index in the design of clock circuits. The clock performance is affected by the fact that the delay time of the comparator in the circuit is strongly influenced by the temperature. This paper presents a principal analysis of this phenomenon and proposes a specific method for optimizing clock accuracy. By changing the comparator’s reference voltage, the clock accuracy is improved to meet the high-precision clock requirements. The high-precision clock frequency designed in this paper is 24 MHz, with temperature stability of ±1%.
Parameters estimation of hybrid modulated signal combining BPSK and LFM Based on Born-Jordan Distribution
Authors: Zhang Hongye , Wang Hongxing , Jiang Zhengyun , Ding Lushan 
Published: June 2023

Abstract
Aiming at the problem of the estimation of hybrid modulated signal combining Binary Phase Shift Keying and Linear Frequency Modulation (LFM-BPSK), the existing methods have low estimation accuracy in low SNR. To solve this problem, the algorithm based on Born-Jordan time-frequency distribution (BJD) is proposed, which uses the Hough transform (HT) to estimate the initial frequency and chirp rate of LFM-BPSK signal, and then estimates the code element width by dimensionality reduction time-domain signal. Finally, simulation experiments show that the parameter estimation accuracy of the proposed algorithm under low SNR is significantly better than that of existing algorithms, and the performance is close to MCRLB.
Design and Implementation of LEO Constellation Simulation System Based on Distributed Simulation Platform
Authors: Jia Zhenhua , Wu Zhiqiang , Li Shaoyang , Zhu Xiaohui , Wang Xiaohan 
Published: June 2023

Abstract
The paper designs and implements a low-orbit constellation simulation system based on the distributed simulation platform. Based on analyzing the composition and the service process of the LEO constellation system, the overall architecture and index system of the LEO constellation simulation system are proposed. Taking the typical application scenario of the LEO constellation as an example, the operation process of the simulation scenario is planned and designed, and the evaluation methods of the overage, capacity, delay, bit error rate, and other indicators of the LEO constellation system are given. By using the component modeling method on the distributed simulation platform, the entities in the simulation system are modeled, and the visual display of the simulation system is realized through secondary development based on cesium digital earth. The LEO constellation simulation system can provide a verification environment for its construction and a basis for the determination, optimization, and upgrading of technical status.
Doppler shift compensation algorithm based on inverse synthetic aperture ladar in binary phase-coded signal
Authors: Liu Mengyuan , Jin Kai , Song Anpeng , Xu Chen , Li Min 
Published: June 2023

Abstract
The binary phase-coded signal is used in inverse synthetic aperture ladar (ISAL) as a commonly used pulse compression signal. However, due to its sensitivity to doppler shift, it will lead to poor or even uncompressible pulse compression results. Combined with the principle of inverse synthetic aperture ladar, the doppler shift introduced by target motion will have a very significant impact, further degrading the imaging results. By using the digital moving target detection (DMTD) method, the doppler information of each distance unit is extracted by performing Fourier transform on the same distance unit, and then a compensation factor is constructed in the frequency domain to compensate for this doppler, correcting the adaptation problem brought by it and improving the imaging result.
Development of novel acceptors with deep LUMO energy levels
Authors: Yang Hao-Yu , Yin Pei-feng , Zhang Heng-yuan , Zhang Ming , Lin Hui , Tao Si-Lu , Zheng Cai-Jun 
Published: June 2023

Abstract
Pure-organic red exciplex emitters are far from satisfactory in terms of quantity and efficiency. The narrow lowest unoccupied molecular orbital (LUMO) energy levels range of reported acceptors together with the intrinsic exciton non-radiative decay are the dominant factors restricting the progress of red exciplexes. Herein, two acceptor molecules operating at unique LUMO of -3.51 and -3.56 eV, namely 4-(6-([1, 1’: 3’, 1”-terphenyl]-5’-yl)-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl) benzonitrile (CNAI-tPh) and 4-(6-(4-(4, 6-diphenyl-1, 3, 5-triazin-2-yl)phenyl)-1, 3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl) benzonitrile (CNAI-TRz), were developed. Through binding to a donor whose HOMO energy level is -5.53 eV, the CNAI-TRz-related OLEDs attained a higher device efficiency amounting to 7.7% with a red-shifted spectrum compared to the CNAI-tPh-related devices. These results are remarkable among the reported pure-organic red exciplex-based OLEDs and demonstrate the tremendous potential of our synthesized acceptors in efficient red exciplexes.
Preparation and Performance Study of Organic Phase Change Refrigerant for Microfreezing and Preservation
Authors: Fang Yu , Luo Xiaoxue , Jing Haotong , Zou Changzhen , Wang Tianren , Wang Yongjie 
Published: June 2023

Abstract
In this paper, to develop a stable and efficient micro-frozen cold storage agent to ensure the freshness of food during transportation, the organic sorbitol aqueous solution was used as the main energy storage agent, and the thermal properties of the multiple compound solution were investigated after adding potassium sorbate, glycine, and highly absorbent resin. The experimental results proved that the total mass fraction of not more than 0.1% of potassium sorbate solution as a preservative could prolong the service life of the storage agent, supplemented by low molecular glycine and highly absorbent resin with more stable thermal properties. The specific formulation of the final developed storage agent is as follows: mass fraction of 5% sorbitol + 0.1% potassium sorbate + 1.75% SAP + 1% glycine + pure water. The new organic phase change accumulator with the latent heat of phase change of 286.5J/g and onset temperature of -4.3°C can be measured. After the thermal performance cycle test, it is found that the accumulator has no obvious delamination, subcooling, and phase separation phenomenon, with stable thermal properties. It can be used repeatedly for a long time, which has certain application development prospects in cold chain transportation and low-temperature logistics.
Quaternary Phosphonium Salt-functionalized Graphene Filter for Effective Water Disinfection
Authors: Cui Yuqi , Hu Can , Zhang Dong , Wang Liang , Wang Xiaoyan , Wang Yilei 
Published: June 2023

Abstract
To access safe water, a facile and low-cost quaternary phosphonium salt-functionalized graphene filter (PYQP-G filter) was developed via pi-pi stacking interaction between perylene and graphene surface. We first synthesized a new perylene derivative with two QPS groups at its amide sides denoted as PYQP. Next, shellac was used as a carbon source to coat the graphene material onto the surface of a porous SiO2 substrate in a chemical vapor deposition (CVD) process. Thus, a graphene filter (G-filter) was obtained. Third, the PYQP was attached to the graphene surface through π-π stacking to generate the PYQP-G filter. Due to the high bacterial accumulation and killing ability of the assembled PYQP, the PYQP-G filter showed high efficiency in water disinfection. When the bacterial concentration is blown at 105 CFU/mL, one PYQP-G filter can purify up to 500 ml of water.
Low Voltage Power Line Physical Topology Recognition Method Based on Data Drive
Authors: Huang Fu , Lin Junhong , Zhang Daolu , Wu Dan 
Published: June 2023

Abstract
The current traditional low-voltage power line physical topology identification method mainly detects the line pulse signal to identify the line topology, leading to poor identification effects due to the lack of correlation analysis of node voltage. A data-driven low-voltage power line physical topology identification method is proposed in this regard. The correlation between the node timing voltages is analyzed by exploring the voltage law to determine the connection between low-voltage power lines. The node resistance values are also calculated to convert the physical topology identification problem into a linear equation problem. In the experiments, the proposed method is verified for identification accuracy. The analysis of the experimental results shows that the proposed method has a low root-mean-square error and better recognition accuracy when recognizing the physical topology of low-voltage power lines.
Reliability Analysis of Power System Considering Flexibility Resources
Authors: Zhang Yuqiong , Chen Ziwei , Zhou Jinghong , Zhao Qiang , Liu Shiyi , Kang Junjie 
Published: June 2023

Abstract
Flexible resources are a critical resource in ensuring the security and steady running of a large percentage of electricity systems that use new sources of energy. The power system’s flexible resources participate in power regulation, improving the power system capability to absorb new energy and also the electricity system’s reliability. This paper calculates the dependability index of electricity system using the basic calculation method of the equivalent energy function. By flexibly handling the new power generation curve’s adjustable capacity and flexible resources, new energy generation and flexible resources count toward equivalent energy calculation, and the dependability index of the electricity system is calculated. The efficacy of this approach is illustrated by an example.