bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Method of Preparing a Microcapsule with High Thermal Conductivity and Its Application
Authors: Wu Yi , Huang Zhonghui , Zhang Yining , Li Dian , Mo Ziliu , Lu Li , Liu Jialei 
Published: March 2024

Abstract
Microcapsules are widely used to add aroma to cigarettes and electronic cigarettes. However, at present, many cigarettes containing aroma microcapsules release insufficient aroma and the active ingredients cannot be fully released, which is due to the fact that the wall materials for preparing such microcapsules are mainly organic molecules, resulting in low thermal conductivity of such microcapsules. Moreover, these materials suffer from uneven distribution, low loading rate, uncontrollable preparation, etc., and has a limited effect on the thermal conductivity of microcapsules. In this study, aromatic and highly thermally conductive microcapsules were obtained by reaction using β-cyclodextrin as wall material and expanded graphite and menthol as core material. It was found that the thermal conductivity of the microcapsules increased exponentially with the increase in the amount of expandable graphite added, and this also indicates a gradual increase in the loading of the core material in the microcapsules. Further, the microcapsules have a high decomposition weight loss temperature, and there is no effect of using them in cigarettes and electronic cigarettes. Moreover, the microcapsules contain menthol, which can enhance the aroma of cigarettes.
Experimental Study on the Mix Proportion Optimization of Full Tailings Concrete
Authors: Yu Zikang , Bai Lihua , Yang Mingjing , yuan Jing , Sun Jianheng 
Published: March 2024

Abstract
Full iron tailings concrete can effectively use iron tailings as the raw materials of concrete. This paper used iron tailings powder, iron tailings sand and iron tailing gravel to replace fly ash, river sand, and ordinary gravel as concrete admixtures, fine and coarse aggregates, respectively. The orthogonal experimental method was used to optimize the mix proportion of C40 strength grade full iron tailings concrete. Research results showed that the optimal mix proportions of C40 strength grade full iron tailings concrete was water cement ratio 0.34, sand ratio 39%, and water reducing agent 0.4%.
Research on Off-axis Aberration Optimization Model for Bifocal Glass Lens
Authors: Kao Chih-Chen , Hsueh Bo-Ren , Wu Bo-Wen 
Published: March 2024

Abstract
Presbyopia entails the gradual deterioration of the eye’s ability to focus, and bifocal lenses have become a common remedy to alleviate blurred near vision and counteract eye strain induced by prolonged usage. The refractive index and Abbe number of these lenses play a crucial role in precisely correcting focal points within the near vision range. Nevertheless, when light rays approach the lens at off-axis angles or with tilts, aberrations occur, often with uneven distribution across real glass materials. The amalgamation of bifocal lenses further compounds the complexity of these aberrations. To enhance the correction of aberrations in bifocal glass lenses, distortion and astigmatism aberration serve as input parameters to calculate the optical quality assessment of the lenses. This study introduces a novel approach to optimize the pairing of bifocal glass lenses through the Taguchi method and fuzzy inference. The experimental design involves the application of the LS9 orthogonal array, streamlining the number of experiments while upholding the reliability of experimental data. The objective is to refine the selection of glass lenses and successfully devise an optimized design model that can be effectively applied to the configuration of bifocal glass lenses.
Optical and Electrical properties of KNN-SBN:Ho/xYb Transmittance Luminescent Ferroelectric Ceramics
Authors: Liu Kaishuo , Liu Haonan , Wang Mingchang , Yu Chengjian , Wang Liwen , Wang Hua , Xu Jiwen , Yang Ling , Qiu Wei 
Published: March 2024

Abstract
Transparent luminescent ceramics 0.94(K0.5Na0.5)NbO3-0.06Sr(Bi0.5Nb0.5)O3: 0.1Ho2O3/xYb2O3 (KNN-SBN:Ho/xYb, x=0.5, 1.0, 1.5, 2.0) have been synthesized using a solid-state reaction method.All the ceramic materials exhibit a pseudo-cubic structure without heterogeneous phases at room temperature. In addition, the microstructure of KNN-SBN:Ho/xYb transparent luminescent ceramics is very dense, and at the same time, good optical transparency is obtained, with a transmittance of 70.19% when x is 0.5. KNN-SBN:Ho/xYb transparent luminescent ceramics exhibit upconversion luminescence properties, and the best upconversion luminescence intensity is obtained when x is 1.5. The KNN-SBN:Ho/xYb transparent luminescent ceramics are ferroelectrics with good ferroelectric properties under an applied electric field of 120 kV·cm−1, and the maximum polarization intensity is the highest when x is 0.5, which is 21.32 μC·cm−2.
Simulation Research on Local Settlement of Kiln Foundation Based on Winkler Theory
Authors: Niu Xiaoyu , Ju Junpeng , Zhou Ming , He Lizhe , Zhou Yuan , Wang Yi , AbdulMajid Khan 
Published: March 2024

Abstract
The masonry structure is one of the main types of modern industrial buildings in China because of its local materials and simple economy. However, these buildings often suffer damage and cracks due to uneven settlement of the foundation and disrepair, which affects the safe and normal use of the structure. It is urgent to maintain and strengthen the structure to restore the safety of the structure. This paper takes Baoji Shenxin Yarn Factory - Kiln Factory as the actual engineering background, and use the finite element software ABAQUS based on Winkler’s theory to establish a finite element calculation model that can more conveniently respond to the effects of different foundation settlements. Through the simulation analysis, the influence law of the local settlement of the kiln foundation on the overall structural force state was obtained, which can provide an important reference basis for the maintenance and reinforcement of the structure.
A Flexible Electrochromic Device based on PEDOT: PSS Working in Visible and Infrared Band
Authors: Pu Ning , Ghosh Pintu , Li Qiang 
Published: March 2024

Abstract
Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), a novel conducting polymer, has gained significant attention in the realm of electrochromism. In this study, we present the fabrication of a simple double-layer device utilizing PEDOT:PSS, which successfully achieves precise control of emissivity in the infrared band. Through comprehensive experimentation, we observe an impressive regulation amplitude of 0.25 and a temperature difference of 10°C, relative to a background temperature of 100°C. Additionally, the device exhibits remarkable flexibility compared to other existing devices. These findings demonstrate the potential of PEDOT:PSS-based double-layer devices as versatile tools for infrared emissivity modulation, holding promise for diverse applications in fields such as thermal management and energy-efficient technologies.
Parameter Investigation of Flyash Jet Mill with Superheated Steam
Authors: Li Jun , Zhang Hongyang , Hong Yun , Liu Lin , Hu Bin , Guo Yi Cliff , Liu Zhen 
Published: March 2024

Abstract
To improve the utilization rate of flyash, refining flyash is an important approach, and steam power grinding with superheated steam is an important equipment to meet the fine particle size requirements of flyash grinding. A 2.4 m height jet mill with four Laval nozzles has been employed here, and FLUENT is adopted to numerically simulate the distribution of fluid velocity and pressure in the flow field within the model. Meanwhile, parameter investigation is also carried out to reveal the effect of nozzle spacing and nozzle inclination angle on fluid filed and average particle velocity distribution. It is found that both spacing and nozzle inclination angle can affect the average particle velocity simultaneously. From the present parameter investigation, it can be concluded that Model 2 (nozzle spacing is 455 mm) with an inclination angle of 4° is the best choice since it can provide largest particle velocity distribution along the vertical direction.
Research Progress of Bio-organic Dust Suppressants
Authors: Yang Lurong , Hong Lei , Huang Jiabang , Jin Jie , Wu Ke , Zhu Shoucheng 
Published: March 2024

Abstract
Both natural and human-generated dust can cause serious harm to the environment and human health. Since the dust suppressants can accelerate the dust settlement more effectively to prevent the dust from raising; at the same time, to comply with the concept of environmental protection, the use of natural bioorganic materials to prepare dust suppressants has become a research hotspot. This paper summarizes the working principle of dust suppressants and the evaluation indexes of the performance of the dust suppressants, reviews the methods and research results of using bio-organic materials such as polysaccharides, lignin, proteins, microorganisms, agricultural and forestry wastes to prepare dust suppressants in recent years, and puts forward the suggestions on the problems of the current bio-organic dust suppressants to provide a reference for their further development in the future.
Research and Application of the Fourth Generation Stratified Water Injection Technology in Daqing Oilfield
Authors: Song XingLiang , Tong Yin , Jin Zhendong , ZhenkunZhu  , Liu Yuting 
Published: March 2024

Abstract
Stratified water injection is the most important characteristic technology in Daqing oilfield development, providing technical support for efficient oilfield development. With the oilfield entering the ultra-high water cut stage, the remaining oil is highly dispersed, the oil-water relationship is complex, the qualified rate of water injection decreases rapidly, and the difficulty of stabilizing oil and controlling water is increasing. In order to solve the contradiction between the increasing workload of water injection well testing and the limited testing team, and mee t the needs of oilfield precision development, the cable-controlled layered water injection technology has been developed. In this technology, the pressure monitoring system, flow monitoring system and flow control system are placed in the preset cable intelligent water distributor. At the office end, the technicians send control instructions on the server software, and send them to the ground control box through the oilfield production wireless network. The cable carrier technology is used to transmit the instructions to the intelligent water distributor through the cable, so as to achieve real-time communication, obtain the downhole layering parameter information, and control the downhole layering injection volume. Ten intelligent injection technology demonstration areas have been built to verify the process adaptability under different development contradictions. The cable-controlled layered water injection technology improves the proportion of water absorption thickness, effectively controls the water cut rise rate and natural decline rate, and has obvious oil increase effect, promoting the digital transformation and intelligent development of the oilfield.
MODELING of Water Saturation in Shallow Sandstone Oilfield
Authors: Wang Shuqin , Liu Minghui , Bo Bing , Ma Hongfei , Zheng Tianyu , Gao Yujie 
Published: March 2024

Abstract
3D geological modeling technology has achieved visualization of underground reservoirs in oil and gas fields, and has been widely applied in oil and gas field development. 3D geological modeling includes structural modeling and attribute modeling, and strata and faults can be completed based on data from oil and gas field exploration and development. The porosity and permeability in the geological attribute model can be established based on logging interpretation conclusions and other relevant data, The establishment of a saturation model has always been a difficulty in 3D geological modelling. As the water saturation, is different from porosity and permeability of an oil field. Saturation is distributed under the control of factors such as gravity and capillary force, and cannot be established through spatial simulation interpolation. Instead, the influence of factors such as gravity and capillary force should be considered. This article takes the shallow sandstone M oilfield in Kazakhstan as an example, and establishes the J function of the oilfield by combining the capillary pressure experiment of the core well, in order to establish an oilfield saturation model.
Case study of optimizing Low Impact Development Strategy in School: Allocation by the Drainage Distance
Authors: Xiao Wanting , Song Jusheng , Ma Xiang , Chen Chunyang 
Published: March 2024

Abstract
Under the concept of urban stormwater management, integrated efficiency of runoff and pollutant control via low impact development facilities came into focus, whereas a few specific descriptions are provided to quantify the strategy of these facilities, including the selection patterns of the locations and sizes and the connection of LID facilities and the drainage system, which is of important for the evolvement of LID strategy. Based on the weighted multi-object goal, the optimizing LID strategy reduces of runoff, pollutant, peak flow, and flooding time under required precipitation conditions, respectively. This paper concluded LID strategy under local requirements and tougher conditions in the aspect of the size and drainage distance of each facility, a new quantified index of locations of specific types of facilities. Then interpret the adjustment pattern based on the feature of rainfalls by correlation analysis. Correlation results show that the drainage distance of green roofs and the storage tank correlated to stormwater management indicators while the retention facilities did not, and the correlation respectively weakened and stronger when storm intensity increased, helping designers to establish better LID planning for schools.
Sensitivity Analysis and Optimization of a Liquid Cooling Thermal Management System for Hybrid Fuel Cell Aircraft
Authors: Habrard Valentine , Hazyuk Ion , Pommier-Budinger Valérie , Jézégou Joël , Benard Emmanuel 
Published: March 2024

Abstract
The objective of this work is to perform a comprehensive system analysis of a liquid-cooling thermal management system for a hybrid-electric aircraft using fuel cells for general aviation by sizing and optimizing the system with respect to a given objective. A sensitivity analysis on the different design parameters and model assumptions is also performed and their impact on the aircraft and its performances will be assessed. Firstly, the case study is defined and an optimization is run with some initial assumptions leading to a feasibility study for the implementation of this system. The sensitivity analysis is then undergone for the chosen coolant type and fuel cell stack temperature selected after the first optimization. Incorporating the findings of this analysis, a second optimization is run on the thermal management system with improved inputs in order to demonstrate a scenario with reduced penalty on the aircraft. Preliminary results show that implementing this hybrid propulsion system along with its thermal management is feasible with a reduction in payload and range. In addition, it can be concluded that initial assumptions and design choices are shown to have a significant impact on the system’s sizing and should be considered in aircraft sizing design loops.
Preliminary design of a retrofitted ultralight aircraft with a hybrid electric fuel cell power system
Authors: Donateo Teresa , Ficarella Antonio , Lecce Leonardo 
Published: March 2024

Abstract
Emission-free aerial propulsion can be achieved with a proton-exchange membrane fuel cell (PEM-FC). In the present investigation, this potential is addressed by designing a hybrid electric power system with fuel cells for an ultralight aerial vehicle to be retrofitted from a conventional fossil-fuelled piston engine configuration. The proposed power system includes a fuel cell, a lithium battery, and a compressed hydrogen vessel. A procedure is proposed to find the size of these components that minimizes the total mass and satisfies the target of a size below 200L and uses performance data of commercially available components. A comparison of different energy management approaches, with and without on-board charge of the battery, is performed. The results underline that the optimal solution is to select the size of the fuel cell to meet the cruise electric request and point out that the maximum discharge current of the battery must be regarded as a key issue in sizing this component, because of the very high take-off power.
Powertrain Design For Small Scale Parallel Hybrid-Electric Test Bench
Authors: Wilson Jamal , Salgado Dinis , Matlock Jay , Mazur Anna , Łowczycki Krzysztof , Widera Patryk , Zawadzki Kamil , Lipka Karol , Gęca Karolina , Suleman Afzal 
Published: March 2024

Abstract
Parallel hybrid-electric propulsion systems for small scale unmanned aerial systems (UAS) when tested with an internal combustion engine are susceptible to damage due to increased torque compared to all-electric configurations. The University of Victoria Centre for Aerospace Research has conducted testing and identified several locations in the system for potential upgrades. One of the largest issues identified was the electromagnetic clutch’s inability to handle the torque of the Corvid-50 engine. Thus, a new clutch and powertrain system was specified which is better rated for combustion operation. Similar findings are reported based on testing performed at Ł-Institute of Aviation, where a hybrid-electric powertrain stand experienced torque spikes. The spike amplitude was several times higher than the nominal momentum of the ICE, given in the specification sheets. In result, at some working modes, a strong slippage of the clutch has been observed. It is also of highest importance to propose and test potential methods to minimize momentum influence to the powertrain. The goal is to increase robustness of such hybrid systems, and decrease the overall mass of the system.
Comparison of Permanent Magnet Synchronous Machines for Hybrid Light Aircraft with traditional and additive winding technologies
Authors: Di Domenico G , D’Andrea M , Villani M , Jung J , Ottolinger R 
Published: March 2024

Abstract
Electrical motors are key components in the electrical transition required for greenhouse gas reduction programs. Future aircraft will certainly employ electrical motors for primary and secondary surface control, for landing gear and for other actuations such as high-lift systems, and they will also need electrical motors for propulsion. The motors pose the hardest challenge due to the high-power density required. Hybrid-Electric propulsion represents one of the most important topics in the aerospace industry and offers an opportunity to pursue the electrification change especially in light aircraft segments. The focus of this paper is the comparison among permanent magnet synchronous motors for Hybrid Light Aircraft propulsion with traditional and additive winding technologies.
High Fidelity Crash Analysis of Ngctr-TD Composite Wing
Authors: Di Palma L. , Albo G. , Nardone M. , Pezzella C. , Musella V. , Belardo M. 
Published: March 2024

Abstract
The T-WING project is a research project aimed at designing, manufacturing, qualifying and testing the new wing of Leonardo Next Generation Civil Tilt-Rotor technical demonstrator (NGCTR-TD), as part of Clean Aviation Fast Rotorcraft activities.
The methodology proposed in this paper encompasses the development of high-fidelity modelling and simulation procedures in support to virtual certification methods for crashworthiness requirements of tiltrotors. Finite Element Analysis (FEA) of an aircraft drop test is a complex and detailed process that aims to simulate the structural behaviour during an impact or drop event. This type of analysis is critical for assessing the safety of an aircraft in emergency landing situations. Wing crashworthiness requirement is specific for tilt rotors: during a survivable crash event, the wing design must ensure a pre-defined rupture with the purpose of alleviating the inertial load acting on the fuselage to preserve the occupants from injuries and fire, guaranteeing the escape paths. Thus, the highly integrated T-WING wing box concept has been designed with the specific feature of frangible sections near the wing-fuselage intersection. The activation of fracture of the external semi-wings in correspondence of frangible section is triggered by the achievement of a well-defined crash vertical load factor.
The objective of the methodology is to simulate the crash effects on the whole wing, using explicit non-linear and time-dependent FE analysis, to verify the wing spanwise placement of the frangible sections, the failure mode, the loads acting at the fuselage links, and the acceleration transmitted to the structure. This work is focused on a standalone analysis of the wing plus a lumped scheme of the fuselage, and it is part of a wider activity which will comprise, in the crash simulation, the most relevant vehicle systems (e.g. fuselage model). Moreover, this numerical activity has been compared with experimental results obtained on a different but similar structure, in terms of global acceleration at wing centre of gravity. Good agreement in terms of acceleration has been found between numerical model and experimental relevant test.
Vibration Response Analysis of a Main Landing Gear System for High In-Flight Dynamic Loadings
Authors: Arena Maurizio , Tartaglia Carmine Carandente , Bruno Giovanni , Bocchetto Francesco , Quaranta Vincenzo , Chiariello Antonio , Belardo Marika , Castaldo Martina 
Published: March 2024

Abstract
The prediction of aircraft vibrations is necessary for identifying possible design optimization points of each on-board system. In this context, the authors investigated the dynamic response of a Main Landing Gear (MLG) conceived for a fast helicopter when exposed to flight vibrations arisen from the engine propellers. The research activity falls within the Racer program of Clean Sky 2 framework, which aims to develop a novel high-speed rotorcraft. Relying on Airbus Helicopters operative requirements, this paper deals with the numerical procedure description of the MLG dynamic response assessment (resonance frequencies, accelerations amplitude, generalized masses) with respect to the expected in-flight vibrations levels. In particular, an equivalent combined load (sine and random spectrum) based on the normal modes and the corresponding modal mass distribution is employed for investigating the relevant effects on structural endurance. The central themes focus on the possible numerical modelling strategies and vibration loads analysis, which led safely to the qualification. This method could allow for performing sensitivity dynamic analyses in case of further design stiffness or weight changes.