bluuebunny/crossref_metadata_2025_split huggingface dataset:
Polymer-based solid/semi-solid electrolytes in lithium ion batteries
Authors: Sun Bangwei 
Published: August 2024

Abstract
The inception of lithium-ion batteries with liquid electrolytes can be traced back to the early 1980s. Nevertheless, the utilization of liquid electrolytes has many drawbacks, including its susceptibility to combustion, limited energy density, and very brief operational lifespan. Consequently, there is currently a concerted effort to substitute liquid electrolytes with solid compounds. This study investigates the electrochemical and mechanical features of solid/semi-solid electrolytes used in lithium ion batteries (LIBs) as well as their performance relative to conventional liquid electrolytes, with LIBs having unique challenges related to high flammability, electrochemical instability, and low mechanical stability posed by conventional liquid electrolytes versus solid polymer electrolytes (SPEs) which provide greater safety, mechanical stability but lower ionic conductivity than liquid counterparts. SPEs offer better safety but lack sufficient ionic conductivity which limits their potential. In order to overcome these obstacles, the implementation of gel-based and composite solid and semi-solid electrolytes is proposed as a means to improve ionic conductivity, electrochemical stability, and mechanical stability. The study suggests that a focus should be placed on solid composite electrolytes as they possess higher mechanical stability, which contributes to improved safety. Additionally, these electrolytes exhibit enhanced ionic conductivity within the range of 10−4 to 10−2 S/cm, hence enhancing the performance of LIBs.
A study on yield calculation method using suspension power chart in beam pumping systems
Authors: Jiang Minzheng , Li Jiawei , Chen Changhe , Liu Geng 
Published: August 2024

Abstract
Accurate production prediction plays a crucial role in well fault diagnosis and parameter optimization, significantly contributing to the advancement of oilfield digital construction. This paper focuses on the dynamic analysis of beam pumping machines to establish a calculation model for the power diagram of rod pumping systems. The solution involves employing the finite difference method and Fourier series method, facilitating the transition from the suspension point work diagram to the pump work diagram. The effective stroke of the plunger is determined by analyzing the opening and closing points of the Ver using the maximum curvature analysis method. Subsequently, the leakage and volume coefficients are derived by integrating on-site production data, culminating in the realization of an oil well production calculation method based on the suspension work diagram. The compilation of the pump power chart and oil well production calculation program was executed using QT 6.2.3. Comparative analysis with measured production data revealed an average accuracy of 90.05% using the finite difference method, surpassing the performance of the Fourier series algorithm. The established model not only offers a reliable means of predicting production but also provides valuable technical support for the digital and intelligent applications within the oilfield.
A review of coordinated multi-robot exploration
Authors: Hu Xinyu , Pei Haoyu 
Published: August 2024

Abstract
A multiple robots system provides advantages over a single robot when it comes to exploring an unfamiliar area. Due to its applications in localization and mapping, search and rescue, etc. This technology has attracted a lot of study interest. The main challenge is properly distributing target points among several robots so that they can each investigate a separate section of the environment simultaneously and ensure the shortest possible total exploration time. However, more work still needs to be done to incorporate research issues in a real setting, such as how to eliminate duplicate exploration areas by giving robots multiple target locations or how to avoid unanticipated barriers in new situations. The allocation algorithms, motion planning techniques, and exploration strategies used in multi-robot collaboration (CME) are reviewed in this paper. Additionally, it provides an explanation of the methods research teams employ to optimize traditional whale optimization algorithm (WOA), how they enhance exploration performance and speed, and a comparative analysis of these methods. We also discussed a cooperative exploration method based on dynamic Voronoi partitioning. However, we also need some obstacle avoidance algorithms to help understand the gaps and issues that will need to be solved in the upcoming years, namely how to handle unexpected impediments in unfamiliar surroundings. Lastly, a summary of potential future lines of inquiry and uses is given.
Non-destructive testing method of concrete based on piezoelectric sensor
Authors: Heng Liying 
Published: August 2024

Abstract
This paper reviews the research and development of non-destructive techniques for monitoring concrete in the past. Active detection techniques, particularly Electro-Mechanical Impedance method and Wave Propagation method have been demonstrated to be effective in monitoring the concrete process. Electro-Mechanical Impedance method detects internal structural damage by analyzing the vibration characteristics of the structure by combining a piezoelectric transducer with the system to be measured. Compared to the Electro-Mechanical Impedance method, the fluctuation method uses two or more transducers, with one serving as an exciter to actively excite the signal. In contrast, the others form an array to receive the stress wave signal. This method offers several advantages, including the absence of dependence on an impedance meter and passive excitation, a simple operating principle, high response frequency, and high immunity to interference. In this work, the research status and progress in the field of non-destructive testing (NDT) of concrete are combined to summarize the results and refine the methodology of the research on the evaluation of concrete material properties and identification of structural damage; based on this, the bottlenecks, research difficulties and difficulties in the field are further outlined, and finally, the research outlook of NDT of concrete in response to these limitations is put forward.
A review of the effect of temperature on the performance of viscoelastic dampers
Authors: Liu Yijie 
Published: August 2024

Abstract
This paper introduces structure and characteristics of viscoelastic damper and analyses the effect of temperature on its performance. Elastic damper is a kind of damping device which mainly relies on the hysteretic energy dissipation characteristic of viscoelastic material to realize the purpose of structural shock absorption. It is widely used in vibration control of mechanical equipment and building structures. However, in the application and research of viscoelastic dampers, it is found that temperature has a significant effect on their performance. This paper first introduces the basic concept of viscoelastic dampers, and points out that there are few papers discussing the effect of temperature on viscoelastic dampers in recent years. In the second part of this paper, the structural composition and characteristics of viscoelastic dampers and viscoelastic materials are introduced. After that, this paper introduces the influence of temperature on the performance of viscoelastic damper from various aspects, and then focuses on the analysis of the influence of temperature on the energy dissipation performance of the damper.
Advantages, manufacturing processes and challenges of FinFET technology
Authors: Zhou Jingfeng 
Published: August 2024

Abstract
As an emerging cutting-edge integrated circuit technology, Fin Field Effect Transistor (FinFET) has not only successfully broken through the limitations of the 22nm node since its development in 1998, but it still maintains considerable vitality and is developing into smaller sizes. As an improvement over traditional MOSFET technology, FinFET offers many technical advantages, which practically solve the challenges encountered by traditional MOSFET. The FinFET process technology is incompatible with planar MOSFET process technology. Moreover, since the development of Finfet technology, there have been many technical challenges. The first half of this article mainly introduces the differences and advantages between FinFET and traditional Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), and briefly outlines its manufacturing process. The second half explains the challenges and hopes on the development path of FinFET technology. I believe this article can provide a reference for integrated circuit designers when understanding FinFET technology, and provide guidance and reference for beginners.
Preparation and research progress in biomedical field of LDHs
Authors: Wen Luning 
Published: August 2024

Abstract
Layered Double Hydroxides (LDHs) are layered compounds composed of a positively charged main layer and interlayer anion assembled by non-covalent bond interaction. The chemical composition of the main lamella in LDHs can be modulated, as can the type and quantity of interlayer anions so that the particle size and distribution of its intercalated assembly can be regulated. Because of its unique physical and chemical properties, it can treat or repair the human body by acting as a drug carrier, introducing antibacterial ions, and as a therapeutic material. Therefore, it has great application prospects in the biomedical field. This paper will briefly describe the preparation method of LDHs and give an example of a specific process for LDHs. After that, this paper will review the application of LDHs in tumor treatment, antibacterial effect, and bone repair and summarize the progress of the application of LDHs in the biomedical field, as well as the opportunities and challenges faced.
A study on a low input current ripple high voltage gain cuk converter
Authors: Liu Liyou , Chen Yongqiang , Liao Hongsheng , He Jingping 
Published: August 2024

Abstract
In the realms of photovoltaic power generation and fuel cells, the application of traditional DC-DC boost converters faces significant constraints due to insufficient gain and pronounced input current ripple. This paper presents a design for a Cuk converter with low input current ripple and high voltage gain based on the conventional Cuk topology. The design incorporates a passive ripple circuit and a coat circuit. The operational principles of the converter are analyzed, followed by the construction of a simulation model in PSIM. Simulation results not only validate the theoretical analysis but also affirm the feasibility of the proposed converter.
An elliptical dual-band antenna with crescent slot for 5G mmWave applications
Authors: Wang Lingyan , Li Huaqing , Shi Yawei , Chen Menggang , Li Chuandong , Wang Huiwei , Zheng Lifeng 
Published: August 2024

Abstract
This paper proposes a new elliptical dual-band antenna with a crescent slot with the advantages of compactness, lightweightness, low cost, and easy installation for 5G mmWave applications. The radiating element is obtained by Boolean manipulation of three ellipses of unequal length to short axis ratio, the resulting crescent slot defining its dual-band characteristics. The -10 dB impedance bandwidth of 23.8—31.6 GHz at 28 GHz and a bandwidth range of 36.8—40.6 GHz at 38 GHz are achieved, completely covering the currently applicable n257, n258, n260 and n261 mmWave bands and filtering out the unlicensed 31—36 GHz band. Dimensions of the single element are 10 mm by 7 mm. In addition, to reduce the interference caused by atmospheric attenuation, a conventional feeder network is combined with the designed antenna element to form a 1 × 4 line array to improve the gain. The antenna array with total dimensions of 20 × 25 mm2 is modeled in 0.254 mm thick Rogers 5880 substrate. As a result of the array configuration, 10.4 dBi gain and a 95% radiation efficiency are achieved in the 28 GHz band. Meanwhile, at the 38GHz band, the gain is 10.4 dBi and the radiation efficiency is 95%. The proposed antenna meets the 5G communication requirements well and can be a better candidate in the mmWave band range.
Research on channel modeling technology of visible light communication system based on the ray tracing method
Authors: Gu Zhiming , Yang Junhong , Wang Pengliang 
Published: August 2024

Abstract
Visible Light Communication (VLC) is a new mode that combines lighting and communication. Because it can meet the needs of large capacity and ultra-high transmission rate, effective analysis of indoor visible light channel characteristics can better provide VLC systems. We provide a reference basis for the design, and VLC technology using Light Emitting Diode (LED) as the light source has become one of the research hotspots in the field of wireless communications. To solve the problems of existing indoor visible light channel modeling methods such as being ideal, high complexity, or poor in versatility, this paper researches indoor visible light communication channel modeling and related theories and methods, using rays with strong scene adaptability. Based on the tracking method, starting from the need to reduce computational complexity and improve tracking accuracy, a channel modeling method for indoor visible light communication is designed. We propose a high-precision indoor visible light communication channel modeling method that combines central ray tubes and bidirectional ray tracing. We use the forward ray tracing method to model indoor visible light communication channels. The simulation experimental results show that the channel modeling method proposed in this article can effectively improve modeling efficiency.
A pilot-study on the influence of fused filament fabrication (FFF) parameters on multiple performance metrics.
Authors: Sherif Mohamed , Mahmoud Hesham , Mekhiel Sameh , Elmesalamy Ahmed S. 
Published: August 2024

Abstract
This study examines the key process parameters in the 3D printing of PLA and their influence on different responses. The examined parameters include layer thickness, infill percentage, raster width, build orientation, raster angle, and extrusion temperature. Their impact was evaluated using a fractional factorial design on key essential characteristics such as tensile strength, dimensional capability, surface roughness, and cost-effectiveness. Pareto plots were utilized to identify and prioritize the most influential parameters for each response. The study’s findings showed that layer thickness, infill percentage, and orientation around the x and y axes have a notable impact on all of the observed responses. In contrast, it was found that the angle between two successive layers did not have a significant impact on any of the responses.
Evaluation of solid propellant burning rate by using strand burner and static firing tests
Authors: Nour Eldin A. F. , Adel Walid. M. , Elsabbagh Ahmed 
Published: August 2024

Abstract
The main objective of this paper is to compare the different methods used to measure the burning rate of hydroxyl-terminated polybutadiene (HTPB) propellant. The burning rate measurement is carried out under varying crosslinking density, which is determined by the curing ratio, i.e., the equivalent ratio of diisocyanate to total hydroxyl (NCO/OH) ratio. Four batches with different curing ratios were produced using fixed production processes. To measure the burning rate, cured solid propellant strands were tested using the acoustic wave emission method at different pressures ranging from 4 to 10 MPa and also by using static firing test of subscale motors. The study showed that there was little difference between the results obtained from the acoustic wave emission method and subscale motors.
Analytical and numerical studies of gas discharge out of gun barrel tube
Authors: Abdullah M , Elsaady W , Ibrahim A , Elbayoumi M 
Published: August 2024

Abstract
This paper investigates the characteristics of the discharge of gases out of gun barrel tube. The paper gives an insight into the physical principles that govern gas discharge through the presentation of analytical and two different numerical approaches. The analytical model is based on the well-known Bravin’s model, whereas the numerical approaches involve single- and two-phase flow numerical simulations conducted by utilities of Computational Fluid Dynamics (CFD). The differences between analytical and numerical results are analysed, from which the numerical approach is found to be capable of capturing the interacting phenomena due to the discharge of hot and high-pressure gases. The visualisation of flow parameters manifests the complex dynamics evoked by flow patterns and the formation of Mach disc and shock waves. It is found that the analytical Bravin’s model underestimates the pressure decay inside the barrel due to gas discharge compared to both the single- and two-phase flow numerical approaches.
Effects of Matrix Cracking-Induced Delamination on Thermal Buckling of Composite Laminate
Authors: Sayed M , Saleh S , Ibrahim H H 
Published: August 2024

AbstractDelamination and matrix cracking are common damage modes in composite laminates, significantly impacting their structural integrity and performance. Under elevated temperatures, the collision of anisotropic thermal expansion and nonlinear stiffness responses affect the onset of thermal buckling in flying vehicles. This study implements a multi-scale analysis framework, incorporating finite element modeling and analytical methods to obtain the reduction in mechanical properties of the composite laminate and its stiffness degradation based on an effective stiffness model due to pre-existing matrix cracking in plies. Based on non-linear equations, obtained from the principle of virtual work, in combination with first-order shear deformable theory and von Kármán strain-displacement relations, the thermal buckling temperature, post-buckling behavior of composite laminates are investigated. This work paves the way for developing a model to predict the influence of the laminate stiffness, delamination size, transverse crack location, stacking sequence, and plies thickness on the laminate.
Development of Modified Rhombus Amplifier of Positioning Stage Compliant Mechanisms
Authors: Said A E , Awad Mohammed I. , Abu-El-Yazied T G , Hedaya Mohammed 
Published: August 2024

Abstract
This paper presents a modified design of rhombus-type amplifier used in positioning stage compliant mechanism. The new rhombus design is introduced to enhance the performance of rhombus and the results are promising. The new approach of rhombus amplifier is based on mixing the concept of rhombus type with the idea of hinges (reduced section portions) existed in bridge type. The performance of the proposed design is investigated by the pseudo rigid body model and validated by the finite element analysis. The new rhombus design improves displacement amplification ratio by (22.3%) with slightly change in master mode natural frequency (1.3%). The pseudo rigid body model for new rhombus design is consistent with the ANSYS results, and hence can be used in modelling and analysis of the new rhombus design.
Research on reliable coverage planning of substation based on equipment service level
Authors: Shao Weiping , Li Yong , Wang Meiying , Qiu Jinyi 
Published: August 2024

Abstract
5G network can meet the multi-type service access needs of substations and promote the intelligent upgrade and transformation of power grids. The layout of buildings and electrical equipment in substations, as well as electromagnetic interference, will have a greater impact on 5G signal coverage. In this paper, a three-dimensional simulation model of the substation is first established, and basic parameters of base station planning are determined. Then, a safety function considering equipment service level and an electromagnetic interference calculation method are defined. Finally, a coverage planning algorithm based on electrical equipment service level and received power quality is proposed to improve the reliability of service access and ensure the safe and stable operation of the system. Simulation results show that the algorithm is effective and reliable.
A dispatch model coordinated power and heating system in electricity market considering resource aggregation and decomposition
Authors: Chen Mingyuan , Yang Youhui , Zheng Wenbin , Qin Fanglu , Qi Le , Zou Qi , Zhu Langxun 
Published: August 2024

Abstract
With the high proportion of installed capacity of renewable energy, the stability and robustness of the new power system need to be improved. The integration of the power system and heating system is an orientation to promote the ability of wind power accommodation. This thesis first introduces the integrated model considering power and heating systems. However, the integrated model requires the topology in the heat network and the parameters of heat devices, which is difficult to access and complicated to solve. Under this situation, the heat devices are aggregated into an equivalent generation unit in the power network. A coordinated dispatched model based on resource aggregation and decomposition is then proposed. In simulation, the economy, flexibility, and security of a given formulation are investigated through marginal price and units’ behavior.
Short-term load forecasting of mixed industrial users in distribution networks using DARTS-LSTM method
Authors: Shi Wenyu , Yang Dechang , Dehghaniang Payman 
Published: August 2024

Abstract
Load forecasting has perennially stood as a fundamental pillar within the power industry, with precision in prognostication constituting a paramount necessity for critical functions including grid management, optimization of energy storage, and response to demand fluctuations. In the present study, we introduce a comprehensive global modeling prediction framework aimed at forecasting large-scale power demand within time series data, alongside the development of a novel short-term power load forecasting model. By integrating all time series data pertaining to the same regression task and employing a unified univariate prediction function across the entire time series dataset, we efficaciously forecast large-scale heterogeneous loads aggregated at various levels within distribution networks. The proposed framework leverages the cutting-edge DARTS (Differentiable Architecture Search) deep learning framework for implementation. Through comprehensive experimentation on real-world data, our model framework demonstrates superior performance in terms of overall prediction accuracy, scalability, and robustness in handling missing and non-stationary time series data.
On determining residual stresses in a viscoelastic coating of arbitrary thickness formed during multilayer application on the inner surface of the straight pipe wall
Authors: Parshin D A , Kazakov K E 
Published: August 2024

Abstract
The technological problem of forming a coating of arbitrary thickness on the inner surface of the wall of a straight pipe due to the multilayer application of a material having the property of viscoelasticity is considered. It is assumed that during the forming process, the coating experiences the action of inertia forces due to the relatively intense rotation of the coated wall. To determine the residual stresses in the resulting coating, a non-classical model of deformable solid mechanics, based on the concepts of growing continuum is used. With the help of the developed model, boundary value problems are formulated, the solutions of which make it possible to construct the desired residual stress distributions for arbitrary programs for changing the parameters of the implemented technological process.