bluuebunny/crossref_metadata_2025_split huggingface dataset:
Wave Load and Strength Analysis of Truss-Floating Box Aquaculture Vessel
Authors: Zhang Yuchen , Zhang Zhaode , Xu Peng 
Published: July 2023

Abstract
There are no specific codes or rules for designing a new truss-floating tank aquaculture vessel developed in recent years. Moreover, relevant rules for ships and offshore structures are usually referred to in different design stages. However, the floating way and the structure of the truss-floating tank aquaculture vessel are different from those of any ship or offshore platform. According to the code of ship or ocean engineering, there will be significant errors in the design. Firstly, loads of vessels at different sea conditions are calculated using SESAM software. The stresses of the truss-floating tank aquaculture vessel are numerically simulated in accordance with the maximum loads. Furthermore, the global longitudinal strength can be evaluated. The sensitivity of the vessel’s strength to wave parameters is analysed. The research results can provide a valuable reference for designing a truss-floating tank aquaculture vessel.
Corrosion Behavior and Simulation Analysis of Silicate Adhesive under High Temperature and Abrasion-Acid Environment
Authors: Gao Ying , Zhao Yuhang , Lin Jing , Li Yifan , Chang Ning , Miao Jiabing , Li Shichun 
Published: July 2023

Abstract
For studying the corrosion behavior and simulation analysis of silicate adhesive under high temperature and abrasion-acid environment, the corrosion behavior of silicate adhesive was tested with mechanical compression, scanning electron microscopic and X-ray diffraction (XRD), and analyzed under high temperature with finite element modeling. The results showed: under high temperatures and the abrasion-acid environment, the solid filler in the adhesive network structure will be exposed with the effect of particle wear. This will lead to a corrosion reaction between some fillers and hydrochloric acid, making dissolution loss. Large hollow holes will be formed at the loss part with the deepening of corrosion, the internal interconnection will occur, and the compression fracture curve characteristics of porous materials will appear, which will greatly reduce the compression strength of the materials. In special environments (temperature 200°C, flow rate 2m/s, and 31% concentration acid solution), hydrochloric acid corrosion is the control factor of silicate adhesive degradation.
Effect of ultrasonic surface rolling on fretting wear behavior of GCr15 steel
Authors: Sun Xinhua , Zhang Mingyuan , Xia Dianxiu , Wang Shouren , Zhang Yunhe , Cai Meigui , Si Guyi , Li Shuqi 
Published: July 2023

Abstract
Bearings are susceptible to fretting wear between the rolling element and the collar, which affects the normal service of bearings. In order to improve the fretting wear performance of GCr15 bearing steel, ultrasonic surface rolling treatment was performed on GCr15 steel under different static pressures and passes, and the fretting wear test was then carried out. Test results showed that the surface roughness was decreased and the microhardness was increased after ultrasonic surface rolling treatment. With an increase in static pressure and passes, the roughness decreases and the microhardness increased. Besides, a lower steady friction coefficient and fretting wear volume were obtained with the specimens performed by ultrasonic surface rolling treatment. With an increase in static pressure and passes, the wear volume and steady friction coefficient decreased together. Furthermore, the mechanism of fretting wear changed from severe adhesive wear, fatigue wear, and abrasive wear to abrasive wear and slight adhesive wear due to the application of ultrasonic surface rolling treatment.
Influence analysis of anti-spatter spray on welding process and weld properties
Authors: Ji Ang , Zhang Liping , Peng Genchen 
Published: July 2023

Abstract
Based on the accumulation situation of anti-spatter spray in actual manufacturing, butt joints are implemented to analyze the state changes of two types of anti-spatter spray and their effect on arc stability, molten pool fluidity, and weld performance. The results show that the fluidity of water-based anti-spatter spray is significantly better than that of oil-based anti-spatter spray in the welding process, resulting in a large accumulation near the arc suppression position. This causes strong fluctuations in the arc and molten pool, while the oil-based anti-spatter spray can reduce the spreadability of the molten pool near the bevel. In terms of weld performance, oil-based anti-spatter spray reduces the plasticity of the weld, and the average elongation of the tensile specimens of the corresponding joint is 37% lower than that of the joint without anti-spatter spray. The rapid evaporation of the water-based anti-spatter spray leads to faster cooling of the weld, resulting in a narrow range of hardened microstructure in the heat-affected zone. Therefore, an apparent increase in microhardness at the corresponding location.
Shear Strength of Honeycomb Sandwich Panel with Impact Damage
Authors: Chen An , Zang Weifeng , Li Lei 
Published: July 2023

Abstract
Impact damage may reduce the mechanical property of honeycomb sandwich composites. In this paper, the impact damage and post-impact shear behavior of honeycomb sandwich plates are studied experimentally. The same impact damage energy was applied to all six test specimens. The damage region and depth of the impact crater were measured by using equipment. Shear tests were conducted on intact and damaged specimens to compare their strain fields and failure modes. The results show that there were no buckling phenomenon in the skin occurred both in intact and damaged specimens during the whole shear experiment. The failure mode of the pristine specimens is different from that of damaged specimens. The shear failure load after impact decreases by 17.1% compared to the non-impact panel. This leads to the conclusion that the impact damage worsens the mechanical property of the honeycomb composite panel and has a great effect on it.
The Influence of Wire Diameter Uniformity on the Quality of Fiber Optic Wire Package
Authors: Li Xiaodong , Meng Lei , Yan Ying , Zhou Ping 
Published: July 2023

Abstract
The fiber optic wire package is the core component of fiber optic guided rockets. Due to the non-uniformity of the fiber optic wire diameter, the winding process is prone to winding defects, which affects the missile launch process. In this paper, a finite element simulation model for the winding process of the fiber optic wire package is established. The accuracy of the simulation model is verified by comparing it with the analytical model for the contact pressure between fiber optic layers. Then finite element models considering the wire diameter tolerance are established to analyze the effect of diameter uniformity on the winding quality of the fiber package. The results show that the stress distribution of a fiber optic package becomes increasingly uneven with increasing wire diameter non-uniformity, and the structural stability of the package decreases. The edge fibers of a 20-layer optical fiber package are easily extruded when the deviation from the nominal diameter is more than 3%. This study helps to guide the manufacturing accuracy of optical fibers and improve the structural stability of the wire package.
Feasibility Study on the Wheel Set Wear Prediction Based on Simulation Analysis
Authors: Li Ze 
Published: July 2023

Abstract
For studying the influencing factors of wheel set wear on high-speed trains, a large number of simulation analyses have found that line conditions, speed, tread profile, adhesion coefficient, contact geometry, and other factors have varying degrees of impact on wheel wear. However, based on the difficulty of the wheel set dynamic measurement, it cannot be directly verified. By establishing a rigid-flexible dynamic model for high-speed trains, the correlation between wheel pair wear and wheel rail load under different working conditions was simulated and analyzed. A dynamometer wheel set is used to measure wheel set loads. The results show that there is a strong correlation between wheel and rail wear and wheel set load under different operating conditions, and the actual wheel set load is significantly affected by the measurement line. The simulated wheel rail load is similar to the measured load distribution characteristics. Therefore, it is obviously feasible to conduct wheel set wear simulation analysis based on measured track irregularity data, but it also puts forward higher requirements for measured track data.
Study on dynamic mechanical properties of tungsten copper alloy and application of shaped charge
Authors: Huang Zeyang , Huang Zhengxiang , Zu Xudong 
Published: July 2023

Abstract
The tungsten-copper alloy liner has better performance than the copper liner. In order to better study the jet forming and penetration characteristics and dynamic mechanical properties of tungsten-copper alloy-shaped charge liner, this paper uses a multi-functional mechanical experimental machine and a Hopkinson bar device to carry out quasi-static tensile and dynamic impact tests, respectively, and fit the Johnson-Cook constitutive equation. The obtained parameters are used to carry out numerical simulations and compared with the experiment. The results show that the stress of the dynamic impact curve is higher than that of the quasi-static stress, and the strain rate strengthening effect is more obvious. There is an adiabatic temperature rise at the strain rate and an obvious thermal softening effect at different strain rates. At the highest strain rate, it shows an obvious strain rate strengthening effect and obvious plasticizing effect, and the tungsten-copper alloy has a certain sensitivity to strain rate. The precision of the Johnson-Cook constitutive model is higher, and it can better describe the plastic flow stress of tungsten-copper alloy at a high strain rate. When the parameters of the fitted Johnson-Cook model are used in the numerical simulation, the error between the numerical simulation and the actual is small. The obtained Johnson-Cook model and dynamic mechanical properties can help the follow-up study on the influencing factors of tungsten-copper jet forming and fracture, including the effect of material strength on injection instability, the integration of the shear band model with hydrodynamics, and the comparison of injection molding penetration with copper liners provide relevant data.
Influence of different alloy elements on the color of copper alloy
Authors: Zhou Liyan , Sun Wei 
Published: July 2023

Abstract
In this paper, Zinc, Aluminium, Nickel, Tin, and Iron are chosen as alloy elements to investigate the influence of different alloy elements on the color of copper alloy. The elements in each experimental group were designed by the orthogonal experiment method. The alloy was prepared by the non-vacuum smelting method. The color of the alloy was determined by spectrophotometer and CIE1976L *a*b* color system. The influence of several common alloy elements on the color of the copper alloy was studied. The results show that the content of Zn had a significant effect on the red-green value of “a”, and with the content of Zn increasing from 10wt% to 16wt%, the value “a” decreased by 2.3. The content of Ni had a significant effect on the value of the blue-yellow value of “b”, and with the content of Ni increasing from 0.5wt% to 2.0wt%, the value “b” decreased by 3.5.
Deformation localization behavior research of AZ31 magnesium alloy under impact load
Authors: Huang Xinting , Hou Jie , Lin Biaozhi , Li Mengmei , Jiang Bingchun 
Published: July 2023

Abstract
The dynamic mechanical properties of AZ31 magnesium alloys were analyzed under different strain rates by using a separated Hopkinson pressure bar system. The microstructure of the specimens was observed by optical microscopy. The results show that the dynamic yield strength of AZ31 magnesium alloy is insensitive to the strain rate. The compressive strength is increasing and shear deformation localization behavior is more obvious with the increase in the strain rate. Meanwhile, the temperature within the shear band is about 241 k and meets the twinning dynamic recrystallization temperature. Temperature rise promotes the grain refining effect.
Effect of Heat Treatment on Microstructure and Properties of Quenched and Tempered Steel with High Vanadium Contents
Authors: Wang Tieli 
Published: July 2023

Abstract
After heat treatment, the microstructure of quenched and tempered (Q&T) steel with high vanadium (V) content was characterized using metallographic and scanning electron microscopes (SEM). The proto-austenite grains of the tested steel were compared at different quenching temperatures, and the precipitation behavior of precipitates and matrix microstructure characteristics at various tempering temperatures were studied. Tensile properties and low-temperature impact toughness of the tested steel with different heat treatments were measured using an electronic universal testing machine and an impact testing machine. The findings indicate that as the quenching temperature increases, the size of the proto-austenite grains gradually increases. When the quenching temperature surpasses 920 °C, the size of the proto-austenite grains obviously increases. With a constant tempering temperature, an increase in quenching temperature results in a decrease in the size of precipitates. With a constant quenching temperature, an increase in tempering temperature results in an increase in the size of precipitates. Therefore, the tested steel quenched at 920 °C for 1 hour and then tempered at 630 °C for 1.5 hours would obtain excellent comprehensive mechanical properties, with a tensile strength of 1233 MPa and a low-temperature impact value of 64 J.
Characteristics and properties of plasma electrolytic nitrocarburizing Ti (C, N) coatings on Ti6Al4V alloy
Authors: Hu Zongchun , Xie Faqin , Xu Weichang , Wu Yake , Bi Yingpu 
Published: July 2023

Abstract
Titanium carbonitrides Ti(C,N) coatings were prepared by plasma electrolytic nitrocarburizing in an electrolytic solution containing ammonium nitrate, glycerol and ethanol. The coating consists of an outer compound layer and an inner diffusion layer with a total thickness of about 100μm. The compounds consist of Ti(C,N) and amorphous TiO2. The corrosion current density of the coating is almost an order of magnitude lower than that of Ti6Al4V substrate in 3.5% NaCl solution. The hardness of the coating is up to 2200HK0.025, which is 5~6 times greater than that of Ti6Al4V alloy. The coating itself is worn very slightly while the counter ball suffering serious abrasion during sliding against the SAE52100 counter ball. The PEN/C coating enhances the hardness, corrosion and abrasive resistances of Ti6Al4V alloy substantially.
Nationwide projections of heat- and cold-related mortality impacts under various climate change and population development scenarios in Switzerland
Authors: de Schrijver Evan , Sivaraj Sidharth , Raible Christoph C , Franco Oscar H , Chen Kai , Vicedo-Cabrera Ana M 
Published: July 2023

Abstract
Climate change and progressive population development (i.e., ageing and changes in population size) are altering the temporal patterns of temperature-related mortality in Switzerland. However, limited evidence exists on how current trends in heat- and cold-related mortality would evolve in future decades under composite scenarios of global warming and population development. Moreover, the contribution of these drivers to future mortality impacts is not well-understood. Therefore, we aimed to project heat- and cold-related mortality in Switzerland under various combinations of emission and population development scenarios and to disentangle the contribution of each of these two drivers using high-resolution mortality and temperature data. We combined age-specific (<75 and ⩾75 years) temperature-mortality associations in each district in Switzerland (1990–2010), estimated through a two-stage time series analysis, with 2 km downscaled CMIP5 temperature data and population and mortality rate projections under two scenarios: RCP4.5/SSP2 and RCP8.5/SSP5. We derived heat and cold-related mortality for different warming targets (1.5 °C, 2.0 °C and 3.0 °C) using different emission and population development scenarios and compared this to the baseline period (1990–2010). Heat-related mortality is projected to increase from 312 (116; 510) in the 1990–2010 period to 1274 (537; 2284) annual deaths under 2.0 °C of warming (RCP4.5/SSP2) and to 1871 (791; 3284) under 3.0 °C of warming (RCP8.5/SSP5). Cold-related mortality will substantially increase from 4069 (1898; 6016) to 6558 (3223; 9589) annual deaths under 2.0 °C (RCP4.5/SSP2) and to 5997 (2951; 8759) under 3.0 °C (RCP8.5/SSP5). Moreover, while the increase in cold-related mortality is solely driven by population development, for heat, both components (i.e., changes in climate and population) have a similar contribution of around 50% to the projected heat-related mortality trends. In conclusion, our findings suggest that both heat- and cold-related mortality will substantially increase under all scenarios of climate change and population development in Switzerland. Population development will lead to an increase in cold-related mortality despite the decrease in cold temperature under warmer scenarios. Whereas the combination of the progressive warming of the climate and population development will substantially increase and exacerbate the total temperature-related mortality burden in Switzerland.
Pocket parks-a systematic literature review
Authors: Dong Jing , Guo Ruonan , Guo Fei , Guo Xiaoming , Zhang Zhen 
Published: July 2023

Abstract
The rapid process of urbanization and climate change have resulted in socio-environmental issues that necessitate viable intervention strategies to create green, sustainable, healthy, and livable built environments. One effective method of achieving this is through the development of pocket parks. Although several studies have explored the benefits and design principles of pocket parks, there is a lack of systematic and quantitative understanding, which could influence the decision-making process for the proper adoption of pocket parks. In view of this knowledge gap, this study employs bibliometric methods and critical review to quantitatively analyze and systematically review 276 papers published in the Web of Science and Scopus databases between 1977 and 2023. Firstly, a bibliometric analysis is conducted, providing a comprehensive overview of research on pocket parks. Secondly, a detailed critical review is conducted from three major perspectives: influencing factors, design methods, and benefits of pocket parks. Finally, the research trends and future directions are discussed. The results indicate that (a) pocket park development takes various forms, with a growing number of articles published each year. However, research on this topic is primarily concentrated in the United States and China, with significant knowledge gaps remaining globally. (b) The utilization of pocket parks is affected by various factors, including internal, external physical, and socio-economic factors. The mechanisms of these factors and their interactions demand deeper understanding. (c) There is a need to conduct an in-depth exploration of planning methods for pocket parks, and planning and design methods in different country contexts can be expanded and compared. (d) Further research is needed to compare the benefits of pocket parks in different climatic zones in terms of depth and width. The outcome of this study can contribute to the body of knowledge on pocket parks, foster their wider acceptance, and help urban planners, practitioners, policy makers, and government managers apply them more effectively in resilient and livable cities of the future.
Short-term extreme heat at flowering amplifies the impacts of climate change on maize production
Authors: Luo Ning , Mueller Nathan , Zhang Yi , Feng Puyu , Huang Shoubing , Liu De Li , Yu Yonghong , Wang Xingya , Wang Pu , Meng Qingfeng 
Published: July 2023

Abstract
Extreme weather poses a threat to global crop production, food security and farmer livelihoods. High temperatures have been identified as detrimental to crop yields; however, how heat stress during the critical flowering stage will influence future maize (Zea mays L.) yields remains unclear. Here, we combined statistical and process-based models to assess impacts of short-term extreme heat at flowering on Chinese maize yield under climate change. We showed that heat around flowering has a stronger impact on yields than heat at other times in the growing season, especially for temperatures >30 °C. Heat stress during flowering was responsible for 23% of total yield loss from extreme degree days (EDDs) in 1990–2012. An improved process-based model (Agricultural Production Systems sIMulator (APSIM)-maize) incorporating a grain-temperature function was then applied and indicated that extreme heat at flowering amplified the impacts of climate change on maize production compared to the original model. The improved APSIM-maize predicted an 8.7% yield reduction across the Chinese Maize Belt as EDDs increased more than quadrupled at the end of the century (2070–2099) under a high emissions pathway (SSP585) in comparison with the baseline period (1990–2019). Our study highlights the importance of extreme heat at flowering on maize yield and can inform farmers and policy makers on adaptive measures as well as providing a reference for other crop areas facing similar challenges.
Nutritional composition of smoked skipjack produced in Ambon
Authors: Rieuwpassa F , Tapotubun A M , Matrutty Th E A A , Nanlohy H , Savitri I K E 
Published: July 2023

Abstract
Smoked skipjack is very popular processed fish product in Ambon with a very acceptable taste and flavor, and so much pleasure to be consume. Smoked skipjack is produced traditionally by the method of hot smoking process. Skipjack is good production through the year in Maluku included Ambon, so it ideal as a raw material in smoked fish production. As a popular product in Ambon, smoked skipjack nutritional facts are appropriately to be identified. This study was purposed to determine the proximate composition of smoked skipjack using exploratory method. The product samples were collected from smoked skipjack processing sites at the three producing center villages. The laboratory analysis carried out to determine the nutritional (proximate) composition. The result showed that traditional smoked skipjack in Ambon has a good nutritional composition of 60.34% moisture, 31.97% protein, 4.38% fat, 1.46% carbohydrate (by difference), 1.69% total ash and energy 173 calories.