bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation Analysis of Corona Pulse Propagation along the Line Based on an Actual Transmission Line
Authors: Zhang Borong 
Published: July 2024

Abstract
In the partial discharge test of the shunt reactor of the ultra-high voltage transmission line, the corona discharge caused by high voltage interferes with the test. To further study the propagation rules of the corona pulse on the line side in the transmission line during the ultra-high voltage partial discharge test, based on the parameters of an actual transmission line, the ATP-EMTP electromagnetic simulation software was used for modeling. The propagation rules of corona pulses in the transmission line were analyzed in detail through the simulation model. As the propagation distance increases, different frequency components show different degrees of attenuation. The higher the frequency is, the faster it attenuates.
Infrared Gas Sensor Based on MEMS Technology for Gas Detection
Authors: Xiao Ning , Li Weichao , Tian Yuewei , Wang Weijun , Yuan Chao 
Published: July 2024

Abstract
This paper presents an infrared gas sensor based on MEMS technology. The sensor can detect the input, output light intensity, and perform data processing. According to the corresponding results, the concentration of the gas to be measured can be obtained. The thickness of the protective layer and supporting layer of the infrared sensor transmitting unit can be changed. The proper size can make the transmitting unit work in a state of low deformation and high efficiency. The concentration of gas to be measured can be measured indirectly by using the sensor to detect the change of resistance of the unit. In this paper, the thickness of the protective layer and the supporting layer of the sensor transmitting unit is analyzed by finite element analysis. It is found that the thickness has a linear relationship with the deformation and temperature of the bridge deck. Further, it can be seen that when the thickness of the emission layer and the support layer is selected at the appropriate size, it has a good working state. Therefore, the sensor has good infrared emission intensity and stability. It has a broad application prospect in the early fire characteristic gas monitoring of cable.
On-line error monitoring of capacitive voltage transformer based on substation topology and distribution analysis
Authors: Liu Ziyuan , Zeng Feitong , Li Dong , Hu Haoliang 
Published: July 2024

Abstract
The capacitor voltage transformer (CVT) is widely used in power systems with high voltage levels. The operation state of CVT is related to the accuracy of electric energy metering. Because the internal structure of CVT is complex and vulnerable to the external environment, the error may be out of tolerance in the actual operation process. The error is composed of system error and random error. The change of error is mainly the change of system error. In general, random errors satisfy specific distributions and will not change easily. In this paper, the voltage amplitude and phase effective value output by the CVT acquisition device at the same voltage level are used to compare the amplitude effective value of the in-phase output to obtain the ratio characteristic quantity K, and the phase effective value is subtracted to obtain the difference characteristic quantity θK
. K and θK
contain the information of two CVT ratio differences and angle differences. The probability density distribution obeyed by K and θK
during the normal operation of CVT is taken as the reference probability density distribution and compared with the probability density distribution to be measured during online monitoring. If the probability density distribution changes significantly, it shows that the ratio difference and angle difference have exceeded the difference under the premise of this paper. Finally, the contribution method is used to locate the out-of-tolerance CVT. In this paper, the online monitoring method is verified by simulation data. The test results show that the ±0.1% range ratio difference and the ±5′ range angle difference can be identified, and the online monitoring of the 0.1-stage CVT error is realized.
The study of multi-discs hydraulic brake pressure dynamic characteristics
Authors: Wang Xiaomei , Zhu Fanghui 
Published: July 2024

Abstract
The pressure dynamic characteristics of hydraulic brakes directly impact the efficiency of the brake control system and aircraft stop distance. A simulation model of hydraulic brake is established with Simulink software. The simulation results are compared with the test results, which proves the reliability of the analysis model. The simulation results visually give the microscopic process of pressure rise and fall in the brake assembly. The study of dynamic characteristics is performed with the correlated simulation model to figure out the reasons for the slow rate of pressure rise and fall, for which suggestions are proposed for future system design improvements.
Compact Valve Hall Layout of DC Transformer for Offshore Wind Farm All-DC Collection Platform
Authors: Huang Junwei , Chao Wujie , Deng Chaoping , Dai Liyu , Wang Jinke 
Published: July 2024

Abstract
To solve the problems of high investment cost, difficulty in improving AC collection efficiency, and broadband resonance in flexible DC transmission of offshore wind power, researchers have proposed an all-DC collection system. To further optimize the economic efficiency of offshore wind farm engineering, this paper studies on the compact valve hall layout of DC transformer for offshore wind farm all-DC collection platforms. The minimum air clearance inside the valve hall was determined based on the insulation level of the DC transformer, and a compact valve hall layout plan for the DC transformer was proposed, taking into account factors such as the electrical main wiring scheme, weight distribution, and symmetrical balance. The proposed compact valve hall layout scheme for DC transformers can reduce the volume of offshore all-DC collection platforms, save engineering construction costs, and improve the efficiency of offshore wind farms. This article can provide reference and guidance for subsequent research on all-DC collection and economic transmission of large-scale offshore wind farms.
Efficient performance analysis and rapid evaluation for spot-welded stainless steel vehicles
Authors: Zhang Zeyang , Li Yana , Sun Xinli , Qiu Xinyu 
Published: July 2024

Abstract
The structural performance analysis and solder joint strength evaluation of spot-welded stainless-steel vehicles are associated with many working conditions, significant data, and repeated work. This will help researchers evaluate and improve calculation efficiency quickly. Taking the body structure of a spot-welded stainless-steel vehicle as the research object, this study conducted a finite element simulation analysis of its stiffness, static strength, mode, fatigue strength, and solder joint strength by the EN12663 standard. A rapid evaluation system for the solder joint strength was developed. The results showed that the performance of the vehicle body under various working conditions can meet the design requirements, and the evaluation results of the solder joint strength confirm the practicability and rapidity of the system, which can provide technical support for the subsequent improvement and optimization of vehicle body structures.
Research on microstructure and properties of laser cladding Ti-Al-WC composite coating on TC4 surface
Authors: Chen Haojie , Li Shuang , Zhao Haitao , Liu Hongwei , Zhao Hui , Gong Xun , Wang Tao , Yang Jinmei 
Published: July 2024

Abstract
To improve the surface properties of TC4, laser cladding was used to prepare Ti-Al-WC composite coatings with varying WC content on the surface of TC4. XRD and SEM were used to examine the physical phase composition and microstructure of the coatings. At various WC contents, the microhardness distribution and wear friction properties of the coatings were also examined. The results revealed a strong metallurgical connection between the cladding layer and the matrix. When no WC was present, the coating was mostly formed of TiAl and Ti3Al phases; however, when WC was present, the coating also contained WC, TiC, W2C, and MAX phases, as well as a minor amount of partially dissolved WC particles. When compared to the substrate, the average hardness of the coating was increased by 1.08-1.76 times. When the WC content was 20 and the wear amount was 1.9 mg, the best wear resistance was obtained. Mainly abrasive and adhesive wear was observed.
Prediction and study of impact performance of mining plastic shell based on PSO-BP neural network
Authors: Gao Fei 
Published: July 2024

Abstract
In order to accurately and quickly predict the anti-impact performance of the plastic shell of a mining sensor, taking the plastic shell of a mine dust concentration sensor as the research object, finite element simulation software is used to simulate and predict its performance in the impact test. Compared with the experimental results, the accuracy of finite element simulation is verified. The batch simulation is carried out by using the finite element method, and the BP neural network and the PSO (particle swarm optimization)-BP neural network are established. The comparison results show that the PSO (particle swarm optimization)-BP neural network has higher accuracy than the BP neural network, and can more accurately predict the mechanical properties of the mine sensor shell under impact conditions. At the same time, compared with the finite element method, it has the advantage of efficiency. The prediction time can be improved to 5-10 milliseconds by using PSO-BP neural network mode, compared to hours of the finite element simulation. This method provides a research method for efficiently and accurately obtaining the impact mechanical performance of mine plastic shells and optimizing structural parameters.
Study on Densification and Defects of Cu-Cr-Zr Alloy Formed by Selective Laser Melting
Authors: Chen Yaolong , Hu Qiang , Wang Linshan , Guo Wenqian , Zhang Jinhui 
Published: July 2024

Abstract
Selective laser melting (SLM) technology features high forming accuracy and a short preparation cycle, providing a significant advantage for shaping complex structural components. Copper-chromium-zirconium exhibits outstanding comprehensive performance and finds wide applications in rocket combustion chambers, automotive inductor coils, nuclear shielding materials, welding electrodes, and other areas. However, due to its low laser absorption rate and high thermal conductivity, the forming process of copper-chromium-zirconium is unstable and prone to forming defects. This study aims to address this issue by employing the response surface method to design process parameters and investigate the impact of these parameters on microstructure and properties, to obtain high-density Cu-Cr-Zr alloy.
Study on low-temperature performance of silicone rubber for aerospace thermal control
Authors: Wang Yunbin , Xia Chenhui , Yu Feng , Yang Tao , Kong Qingle , Liu Fulong , Wang Lei 
Published: July 2024

Abstract
Adhesive bonding technology is the primary method for installing thermal control products on spacecraft. Studying the bonding methods of electric heaters at low temperatures has become particularly important. To validate the feasibility of GD-414 silicone rubber in bonding electric heaters at low temperatures, GD-414 silicone rubber tensile test specimens were designed and fabricated. After thermal testing, it was found that the peel strength and failure mode of the specimens changed after low-temperature storage at -120℃ and temperature cycling from -200℃ to 40℃. The peel strength of the specimens improved after pressure treatment, while the differences in peel strength between different metal substrates with the same roughness were not significant. The research findings demonstrate that GD-414 retains strong bonding performance even after low-temperature storage and temperature cycling, making it suitable for bonding electric heaters.
Mechanical performance of cement mortar with clear glass waste powder as a partial sand replacement
Authors: Ng Wei Yean , Lim Jee Hock , Lee Foo Wei , Lim Siong Kang 
Published: July 2024

Abstract
This research addresses Malaysia’s glass waste predicament, primarily stemming from discarded glass bottles in the food and beverage sector. Typically consigned to landfills, these bottles not only occupy valuable space but also deplete essential resources like siliceous sand crucial for glass production. To combat this environmental issue, the study explores the viability of repurposing waste glass as a construction material. By processing the waste glass to match sand’s size distribution, it is incorporated into cement mortar. The investigation assesses the fresh and hardened properties of cement mortar, including density, flow spread diameter, and various strengths. Analysis of parameters, such as the cement/sand/water ratio, and the extent of glass waste replacement, reveals that 100 % replacement of sand with glass waste powder yields the highest strengths, notably in compressive, splitting tensile, and flexural tests. Maintaining a cement/sand/water ratio of 1:5:1.24 achieves a 7 MPa compressive strength at 28 days and a 200 mm spread diameter in the flow table test. The study concludes that increasing glass waste replacement enhances cement mortar strengths, providing a sustainable solution to Malaysia’s glass waste issue and enhancing construction materials like bricks and concrete products.
Seismic fragility assessment of embankment: A displacement-based approach using dynamic finite element model analysis
Authors: Ahmed Tanvir , Alel Mohd Nur Asmawisham , Kadir Mariyana Aida Ab , Rahim Afikah , Shahrin Muhammad Irfan 
Published: July 2024

Abstract
The assessment of seismic fragility of highway embankments is a key component of seismic risk modeling for traffic infrastructure. This study examines the seismic fragility of an embankment using advanced finite element dynamic analysis, contrasting findings with prior research to validate results. Based on established methodologies, an incremental dynamic analysis (IDA) was executed, with the Probabilistic Seismic Demand Analysis (PSDA) for the development of fragility curves. A comparative study was conducted between two modeling methods; one employing finite difference (FD) method and other employing finite element (FE)method. The analysis revealed that, selection of inputs like the nature of earthquake time history and number of records selected along with the analysis method influences the seismic fragility assessment of embankments. The choice between finite difference and finite element methods can yield differing results, with FD, being grid-based, can face challenges with complex geometries and boundary conditions, on the other hand, FE’s mesh-based approach offers flexibility in modeling intricate domains, handles complex boundary conditions more adeptly, and provides a more continuous representation of material behavior. A distinct dynamic stability test based on Newmark sliding block principles showed the embankment slope’s inherent resilience, with no permanent deformation, underscoring the requirement for further research.
Brine waste from seawater desalination in Malaysia: Assessment on public awareness and understanding
Authors: Mahadi Cynthia , Kasmuri Norhafezah , Miskon Mohd Fuad 
Published: July 2024

Abstract
Water scarcity is a growing concern, and saltwater desalination is being explored as a potential solution, including in Malaysia. Therefore, it is important to assess public awareness of the outcome of desalination and the harmful effects of improper disposal of brine in the ecosystem. Hence, a survey was conducted and analyzed using the relative importance index method to gather information on public awareness of brine waste management practices and the negative impacts of brine waste. One hundred respondents from the public in Malaysia were randomly selected for this sample study. The results indicated that the public has an average level of awareness about desalination. Despite that, their perception of brine waste and its impact on the ecosystem ranges from average to high. Nevertheless, the study also reveals significant findings related to the low understanding among Malaysians regarding the detrimental effects of untreated brine wastewater disposal. Thus, the experts emphasize the importance of education and awareness to the public and encourage the government to implement stricter regulations on brine disposal with more effective policies. Moreover, the output of this paper gauged the public awareness level in Malaysia regarding the increasing use of desalination technology and the potential negative consequences of brine waste. It later equips the policymakers with the necessary information to make well-informed decisions by actively engaging the understanding of local communities' needs, perspectives, and aspirations on matters that directly affect them.
Comparative assessment of hot and warm mix asphalt to develop a sustainable pavement: Kg Ayer Merah Mersing case study
Authors: Kamarudin S N N , Hainin M R , Satar M K I M , Warid M N M , Yaacob H , Lazi M K A M 
Published: July 2024

Abstract
In this study, the construction and pavement properties of warm mix asphalt (WMA) in rural areas were examined in comparison with the conventional mixture of hot mix asphalt (HMA). Both WMA and HMA mixtures were constructed at Kg Ayer Merah, Mersing, Johor in accordance with Public Work Department specifications, regarding redesign of road pavements in rural areas. This study to evaluate the comparison performance of WMA and HMA mixtures at one month and four months after construction based on performance in mechanical (Rate of cooling, density, Marshall, resilient modulus and dynamic creep) and macrotexture performance (sand patch and pendulum test value) and environmental analysis (carbon emission). The findings showed that WMA mixtures showed similar and better performance over HMA mixtures after four months construction in mechanical performance. WMA also obtained a higher rate of cooling than HMA besides reducing carbon emissions during production and road construction indicating the mixture more convenient to cater for double handling in rural areas. This huge impact is in line with the sustainable development goals (SDGs), which aim to develop sustainable infrastructure and reduce global warming issues.
Effects of coal fly ash as partial replacement for cement towards concrete properties
Authors: Amat Roshazita Che , Ibrahim Norlia Mohamad , Rahim Nur Liza , Afiza Mohamed Syakirah , Hui Yi Foo 
Published: July 2024

Abstract
The use of industrial waste, particularly fly ash (FA), as a substitute for ordinary portland cement (OPC) has gained attention due to global trends promoting the recovery and utilization of waste materials in construction. Previous research has demonstrated that fly ash has the potential to replace cement without compromising the strength of concrete, driving further exploration and validation of this concept. In a study investigating the effects of fly ash replacement in concrete, different percentages of fly ash were used to replace OPC in C25 grade concrete. Various tests were conducted, including X-ray fluorescent (XRF) analysis, sieve analysis, workability test, compression test, and water absorption test, to assess the characteristics, properties of the materials, fresh and hardened concrete. The results indicated that the replacement of FA in cement showed significant effects, with the strength at 12.5 % and 15 % replacements reaching the target strength of pure concrete at both 7 days and 28 days. These findings suggest that fly ash, at these replacement levels, exhibits desirable strength comparable to OPC, making it a viable alternative.
Performance of steel fibre reinforced lightweight aggregate concrete in fresh and hardened state
Authors: Zamri Nor Fazlin , Awalluddin Dinie , Mohamed Roslli Noor , Mastor Muhammad Najmi Mohamad Ali 
Published: July 2024

Abstract
There is a growing interest in the manufacture of lightweight aggregate concrete (LWC) due to its low density, which is below 2000 kg/m3. However, the trade-off for the lower density is a reduction in strength, leading to a drop in crack resistance. Therefore, steel fibre inclusion was implemented to augment the crack resistance of lightweight concrete (LWC). Thus, the present study aims to examine the impact of steel fibre on both the workability and mechanical properties of lightweight aggregate concrete (LWC) that incorporates lightweight expanded clay aggregate (LECA). Three varieties of concrete were fabricated, namely normal weight aggregate concrete (NC), lightweight concrete (LWC), and steel fibre lightweight concrete (SFWLC). The SFLWC incorporated hooked-end steel fibres as reinforcement, with fibre volume percentages of 1 % and 2 %. A strength assessment was undertaken to ascertain the concrete properties, with particular emphasis on compressive and tensile strength. The findings indicate that the incorporation of both LECA and steel fibre led to a notable reduction in the workability of concrete. Incorporating a 2 % steel fibre content into LWC yields a marginal enhancement in compressive strength. Steel fibre demonstrates enhanced efficacy when subjected to tension, with the most significant increase measured at around 152 %.
Exploring the opportunities in circular design as an affordable housing solution in Nigeria
Authors: Suleman T A , Ezema I C , Aderonmu P A 
Published: July 2024

Abstract
The shortage of adequate housing is caused by global challenges such as urbanisation, economic instability, pandemics, and displacements. Additionally, the building sector is resource-intensive, leading to the emergence of the circular economy (CE) that is focused on resource efficiency. The design stage plays a central role in the CE model. However, circular housing design (CHD) in Nigeria has not been thoroughly explored. This study examined the opportunities for implementing CHD in Nigeria. Through a desk review approach, relevant data from the critical review of selected articles from reputable databases in the last five years were synthesized and incorporated into the study. The findings revealed that the adoption of CHD in Nigeria can assist in achieving affordability, decarbonisation, climate change mitigation, improving environmental value, energy optimisation, resource efficiency, and urban mining. More specifically, it will stimulate sustainability in the housing sector, digitalisation, technical expertise development, policies and regulations, land provision, coordination and collaboration, local voluntary stewardship programme, and new market opportunities in housing delivery in Nigeria. There is a need to develop technical skills in CHD through knowledge sharing among design professionals via multi-stakeholder collaborations and investment in technologies, as well as adopting integrated circular project delivery methods in the supply chain.