bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of the Metrological Integrated Support Capability of Launch Site Based on FUZZY-AHP
Authors: Pan Xiao , Lin Yiyong , Li Dong 
Published: December 2022

Abstract
The metrological integrated support capability is an important part of the equipment support capability of the launch site. To realize the quantitative description and scientific evaluation of the metrological integrated support capability, the FUZZY-AHP method is introduced. Based on the study of the factors affecting the capability, the evaluation index system is constructed from four aspects of personnel capability, equipment capability, technical support capability, and comprehensive management capability. A multilevel evaluation model of the metrological support capability is established by using the analytic hierarchy process. Then, with the fuzzy mathematics method, the rules of the fuzzy evaluation for the quantitative and qualitative indicators are formulated. Finally, combined with a launch mission, the FUZZY-AHP method is used to evaluate the metrological integrated support capability. The method is scientific and feasible, which provides an effective reference for the subsequent evaluation of the metrological integrated support capability.
Lump Solution to the (2+1)-Dimensional Hietarina Like Equation
Authors: Li Xin , Jiang Kun 
Published: December 2022

Abstract
In this study, we first derive the (2+1)-dimensional Hietarina(H) like equation by a generalized bilinear differential operator, then solve the lump solution of the H-like equation and finally combine the basic characteristics of the understanding with graphic analysis. In addition, we calculate the learned maximum and minimum.
Big Data-aided Study of the Physical Process of Volume Ignition
Authors: Liu Pan , Zhou Yinzhao , Xiong Wenbin , Liu Chencheng , Liu Jie , Liu Gongjie , Tang Zhangchun , Gao Qiang 
Published: December 2022

AbstractVolume ignition is a method of igniting a fuel as a whole by simultaneously achieving ignition conditions throughout the fuel zone. The basic criterion for ignition is that the thermonuclear energy is greater than the energy leakage at the fuel boundary, resulting in self-sustaining heating and deep combustion. Deuterium-tritium fuels are wrapped in medium to high Z media to reduce radiative leakage and achieve lower-temperature holistic ignition and non-equilibrium combustion, ultimately allowing the fuel to achieve high combustion efficiency. Volume ignition is the use of energy balance relations under the local thermodynamic equilibrium approximation to establish the energy balance equation for thermonuclear systems, and the system ignition threshold is obtained by solving this equation. By understanding the physical process, we believe that the non-equilibrium process is universal to the volume ignition process. Changes in external factors (density, boundaries, albedo, etc.) at the moment of ignition can have a significant impact on the development direction of the system, and an ignition system with a large surface density can nevertheless withstand a large amount of reverse work and continue to burn. The design of the ignition target tries to avoid these factors through margin design, but conversely, the rational use of these laws can further improve the design margin of the capsule. With the aid of big data, the volume ignition method is easier to calculate and has a shorter iteration time. The traditional way is to propose a model, set the material, and then perform the calculation while using big data can set any model and material for calculation. In this paper, a simple comparison will be made to find out that the efficiency of the physical design of a volume ignition target will be effectively improved with the aid of big data. Volume ignition targets can be used not only in Z-pinch-driven systems but also for laser-driven volume ignition.
Mechanism of Bubble Point Pressure and Gas-oil Ratio Changing with Depth in Complex Structural Reservoirs
Authors: Jing Wenlong , Li Aifen , Cheng Yulong 
Published: December 2022

Abstract
Reservoir bubble point pressure and gas-oil ratio are important parameters for the scheme design of oilfield development and calculation for reservoir elastic reserves. However, their change laws are complex. At present, there are few studies on the mechanism of bubble point pressure and gas oil ratio changing with depth, which is an urgent problem to be solved in the exploration and development of oil and gas fields. This study focuses on the variation mechanism of bubble point pressure and gas-oil ratio with depth under different tectonic movement conditions in the process of reservoir formation of complex structural reservoirs. When the buried depth of the reservoir is small, the crude oil from bottom to top will be in an unsaturated state (bubble point pressure is less than the formation pressure) to a saturated state (bubble point pressure is greater than the formation pressure), and there will be a gas cap at the top of the oil layer. When the buried depth of the reservoir is large, the formation pressure of the reservoir from bottom to top is greater than the bubble point pressure, and the crude oil of the reservoir is in a single-phase state. A series of tectonic movements will occur in the process of reservoir formation of complex structural reservoirs, which will affect the state of oil and gas in the reservoir. In this study, under the three conditions of complex structural reservoirs including no tectonic movement, tectonic uplift, and tectonic subsidence, the change in bubble point pressure and gas-oil ratio with depth was analyzed respectively. Finally, the mechanism of bubble point pressure and gas-oil ratio changing with depth in complex structural reservoirs is obtained. This study can provide theoretical guidance for reservoir reserve research and development scheme design.
Research on the accuracy of the generalized Lévy’s solution for deflection of open cylindrical shell structures
Authors: Wang Zhaodong , Li Zhong , Li Pu 
Published: December 2022

Abstract
In the last century, the plate and shell theory has been developed and matured through the research of many theoretical workers at home and abroad. The generalized Lévy’s solution can be used to obtain the static response of a semi-cylindrical shell with curved ends simply supported under arbitrary load. However, the solution is complex and difficult to calculate, so on this basis, a series of simplified methods under specific working conditions are developed, such as the moment-free theory and semi-moment-free theory of cylindrical shells. In this paper, MATLAB will be used to calculate the generalized Levi’s solution and semi-moment-free theory, and compare them with the finite element results of ANSYS. Finally, it is found that the two theoretical solutions can only roughly predict the distribution form of displacement, with an order of magnitude difference. The engineering significance is limited, and the results still need to be improved.
Tension and Deformation Analysis of Suspension Cable of Flexible Photovoltaic Support under Concentrated Load with Small Rise-span Ratio
Authors: Jiang Fangxin , Shang Renjie , Sun Yue 
Published: December 2022

Abstract
The suspension cable structure with a small rise-span ratio (less than 1/30) is adopted in the flexible photovoltaic support, and it has strong geometric nonlinearity. Based on the principle of energy, the increment of cable force and the change of cable displacement under concentrated force are derived for the suspension cable in an equilibrium state under uniform distributed load, and the equivalent bending stiffness of simply supported beam under bending is given. Considering the strain energy generated by cable force variation, the method presented in the paper has higher calculation accuracy for suspension cable structures with a small rise-span ratio, and includes the special case of a large rise-span ratio. An engineering example of flexible photovoltaic support with a span of 15m is calculated and analyzed, and then compared with the finite element calculation results. The results show that the calculation error is less than 1% when the rise is 0.4 m, and the calculation error is less than 3% when the rise is 1.5m. The calculation formula in the paper is simple and accurate, which can provide a reference for static analysis and structural design of flexible photovoltaic support.
Enlightening Visualization of Charge on Capacitors and Capacitor Circuits
Authors: Xuan Chen 
Published: December 2022

Abstract
The ideal parallel plate capacitor in general physics textbooks lacks electrostatic perspectives regarding how conducting surfaces are charged. The current textbooks somewhat neglect close connections between capacitors and electrostatics, leaving students in limbo when analyzing charge distribution on capacitors in circuits. This paper will suggest a new generalized model of the ideal capacitor and offer learners, mainly from the electrostatic perspective, a better train of thought in analyzing how charges are distributed on various surfaces in capacitor circuits. This paper offers a relatively complete review and framework of the ideal capacitor and can serve as supplementary reading material for general physics learners and instructors for in-depth explanations of fundamental topics unavailable in the current textbooks.
Dielectric Condensers: Gauss’ Law and New Visualizations under Macro-and Microscopic Representations
Authors: Xuan Chen 
Published: December 2022

Abstract
The ideal condenser with dielectric in general physics is delivered in a way that lacks in-depth explanation, leaving students in limbo when asked to explain how different surfaces on dielectric condensers when connected/disconnected with wires are charged. This paper will offer a relatively complete set of multiscale tutorials on different methods of applying Gauss’ law on condensers with a dielectric as well as a technique of abstracting condensers partially inserted with dielectric into parallel and series condenser models, both with an emphasis on how to better visualize different surfaces carrying charges of different origins. Special attention in this paper is paid to the best visualization to explain such concepts on different scales. This paper offers a relatively complete review and framework of ideal condensers with dielectric, 1st proposed, which can serve as supplementary reading material for general physics learners and instructors for in-depth explanations or alternative perspectives on fundamental topics unavailable in textbooks.
Introduction to the Decay of Common Particles
Authors: Yang Zitao 
Published: December 2022

Abstract
One of the most important scientific research results in decades is the discovery of a boson particle that has the properties of the Higgs boson, which reiterates the importance of studying particle decay. In this paper, an introduction to common particle decays is given. It contains theoretical and experimental information. On the theoretical side, the paper discusses the concept of decay rate and branching fraction and dives into specific particle decays—the decays of the muon, neutral pion, and neutron. The theoretical results are then correspondingly compared with experimental results. The last section on the decay of the Higgs boson takes an experimental perspective, exploring the details of the data produced at the Large Hadron Collider (LHC).
21 cm Radio Wave Observation on the Milky Way Rotation Curve
Authors: Chen Zhekai 
Published: December 2022

Abstract
Nowadays, the scientific community has generally accepted the existence of dark matter. Astrophysicists investigate this assumption by astronomical observation. The galaxy rotation curve is one of the pieces of evidence for dark matter’s existence. The TLM18 telescope detects a 21 cm radio wave from the Milky Way to measure the rotation curve of the Milky Way. This article analyzes the frequency-power data to find out the rotation curve of the galaxy. The rotation curve is compared to existing theories, including the Kepler model, the exponential disk model, and the isothermal dark matter halo. Combining the exponential disk model with the isothermal dark matter halo, the calculation fits well with observation.
The Derivation of Elastic Fields of a Curvilinear Inclusion
Authors: Lee Yonggang 
Published: December 2022

Abstract
The disturbed elastic fields of a curvilinear inclusion in an isotropic elastic plane are investigated analytically by a newly proposed technique. The boundary of the inclusion is characterized by arbitrary Laurent polynomials in the 2D Cartesian coordinate system, and constant eigenstrains are considered to occur in the inclusion. Based on the irreducible decomposition of an arbitrary tensor, the Eshelby tensor is attributed to two integrals on the curved boundary of the inclusion. The analytical solutions for the induced stress and displacement fields outside the inclusion domain are explicitly derived by utilizing the newly developed technique, including the salient features of the Faber polynomials. Examples show the efficiency of the technique in this paper.
Experimental Study on Damage of the Rail/wheel Sliding Contact Surface in Heavy-haul Railway
Authors: Wei Yunpeng , Wu Yaping 
Published: December 2022

Abstract
Heavy-haul railway plays very important roles in transportation of bulk goods because of their special advantages. Heavy-haul trains can cause obvious damage to the rail/wheel contact surface when starting or braking. In this paper, a new rail/wheel friction testing machine is designed and built, and the damage characteristics of the contact surface during rail/wheel sliding contact are studied. The experimental results show in the process of sliding contact, a large amount of grooves can be seen on the wheel surface and are becoming more obvious with the increase of loads and speeds. On the rail surface, there are various types of damages, including adhesion, spalling, grooves, corrosion, etc., which are closely related to cracks. The results also indicate the wheel wear amount gradually increases with the growth of loads and speeds. However, the rail wear amount varies greatly, which is related to the adhesion of wear particles.
Study on Improvement of Pipe-Soil Spring Model in Mountain Slope Area
Authors: Wang Dongyuan 
Published: December 2022

Abstract
For the interaction between the pipeline and the soil under the condition of large surface displacement, the displacement load is often transmitted to the pipeline through soil springs. The selection of soil spring parameters is based on laboratory research results, which may not be effective for pipe-soil interface simulation. In addition, the load and soil spring coefficient of the pipeline in the slope should vary with space and time, and these factors are ignored by the resistance formula of the current general spring model. The adaptability and temporal load distribution of the pipe-soil spring model in regions of large surface deformation are largely unknown. In this paper, we deduced the soil spring resistance formula when the surface is inclined, established an improved soil spring model for the slope, and obtained the variation law of soil spring resistance in different directions at different slope angles. At the same time, a comparison of the improved soil spring model with the standard soil spring model recommended by international associations and codes was carried out. The rationality of the improved soil spring model proposed in this paper in the calculation of the pipe-soil interaction in the slope section is further verified by small-scale physical model tests. It has a certain guiding significance for the calculation of pipe-soil interaction in slope sections.
Study on Strength Failure and Optimization Scheme of Steel Platform Anti-Skid Strip
Authors: Shen Xuejing , Wang Meili , Yu Shuang , Wang Deshan 
Published: December 2022

Abstract
The strength failure of the anti-skid strip is one of the key factors restricting the service efficiency of the steel platform. In this paper, the compressive stress, shear stress, and the stress on the weld of the steel platform anti-skid strip during the movement of tracked vehicles are obtained through the movement mechanics analysis of heavy tracked vehicles, and the corresponding strength failure conditions are established. According to the calculation results, improvement measures and schemes are proposed for the layout spacing and size of the anti-skid strips on the mechanized platform, to improve the anti-skid and wear-resistant performance of the platform plate.
Sensitivity Analysis of One-Dimensional Performance Prediction for Centrifugal Compressor
Authors: Tang Yaoxuan , Zhang Xi , Liu Yanming , Wang Dalei 
Published: December 2022

Abstract
To explore the sensitivity sorting of a one-dimensional performance prediction model, a high-load centrifugal compressor is studied. Using the Latin Hypercube method, the influencing factors of the one-dimensional performance prediction model are designed. Based on the sensitivity analysis of ANOVA, the main influencing factors of compressor pressure ratio and efficiency performance are investigated, and guidance for compressor optimization is proposed. The results show that the main factors affecting the pressure ratio are deviation loss, radial diffuser incidence loss, and impeller blockage loss. The main factors affecting the efficiency are radial diffuser incidence loss, radial diffuser blockage loss, and radial diffuser choke loss. Finally, the optimal coefficients corresponding to the loss models are obtained based on the sensitivity sorting results. Compared with the corresponding three-dimensional numerical simulation, the error of pressure ratio and efficiency near the design condition is within 1%, which indicates that the presented method can achieve the accurate design and off-design performance prediction.
The Significance of Cyclic Groups
Authors: Wen Hanlei 
Published: December 2022

Abstract
Investigation in group theory has been a widespread practice within the realm of mathematics. In finite group theory specifically, mathematicians have historically aimed to classify finite simple groups. Following the turning consensus that the finite simple group classification is complete, research within finite group theory has shifted to other areas. However, this paper endeavors to fill the missing gaps in the current classification – it does not specify the importance of finite group theory. By focusing on introducing, explaining, and demonstrating cyclic groups and their applications, the paper will reveal, specifically, the importance of cyclic groups in the realm of mathematics and beyond. In particular, the qualities of finite cyclic groups allow them to apply easily and broadly from as simple as division rules and binary number systems (by use of a set of integers of modulus n), to more advanced theory and implementation with computer science. Cyclic group theory deserves increased recognition. In addition, by providing definitions, evaluations, proofs, and concrete examples, this paper also endeavors to become a point of reference for readers to understand, consolidate, and further grasp cyclic group theory and its uses.
Effect of Perlite Content on Performance of Emulsion Explosive in Under-Water Environment
Authors: Liu Lei , Qi Hongyu , Zhang Haitao , Qi Jixing 
Published: December 2022

Abstract
Emulsion explosive has been widely used in underwater blasting construction. To study the effect of perlite content on the performance of emulsion explosives under deep water conditions, the performance of emulsion explosives with different applied pressures and different perlite contents was studied by using the self-built underwater explosion test system. The results show that, with the increase of pressure in the water, the energy of emulsion explosive with different content of perlite as sensitizer has a decreasing trend, which is consistent with the actual situation, and when the perlite content is 4%, the sensitized bubble is adiabatically compressed, and the hot spot fully explodes, and its detonation performance is the best.
Risk Prediction of Gasifier System Based on Dynamic Cloud Bayesian Network
Authors: Liu Ming , Zhou Yan , Sun Lin 
Published: December 2022

Abstract
To address the current problem of insufficient risk level analysis of gasifier systems, an evaluation method combining the cloud model and dynamic Bayesian network is proposed, taking the gasifier system as the evaluation target, using the cloud model to discretize continuous data, and setting each risk factor in the evaluation system as a node in the dynamic Bayesian network to build a dynamic Bayesian network. The entropy weight method is used to calculate the weight of each risk indicator, the maximum likelihood estimation method is used to process the affiliation degree obtained from the cloud model, and the probability obtained by the affiliation-probability conversion method is input into the dynamic Bayesian network as evidence. Finally, the risk prediction assessment for the gasifier system is completed by using the features of forwarding and backward inference of the dynamic Bayesian network, combined with the comprehensive analysis of importance. The study shows that human maintenance efficiency, equipment integrity, gasifier pressure, and oxygen-coal ratio are the weak points that need to be focused on in the operation of the system.
Construction Technology of Pretension Prestressed Reinforced Concrete Structure of Multi-storey Logistics Warehouse
Authors: Wu Qinggang , Zhang Xianjun , Ma Jihao , Lv Xiangyang , Zhang Baoxin , Rong Jianchao 
Published: December 2022

Abstract
At present, there is a problem of too much prestress loss in the construction of multi-layer logistics warehouses in China. To meet the quality requirements of the project, this paper puts forward the research on the construction technology of pretension prestressed reinforced concrete structure of multi-layer logistics warehouse. The loss of prestress in the construction process can be effectively controlled by incorporating pre-tensioning technology into the construction process, placing prestressed tendons, and tensioning operations. Taking a logistics warehouse construction project as the construction object, using the construction technology designed in this paper to construct, the experiment proves that the construction technology of the pretension prestressed reinforced concrete structure of the multi-layer logistics warehouse proposed in this paper can effectively reduce the prestress loss caused by the instability of the construction structure, and can effectively improve the construction quality of the multi-layer logistics warehouse. This shows that the application and practice of pretension prestressing technology in the construction process of reinforced concrete structures has a positive reference significance, which can meet the needs of green engineering such as energy saving and emission reduction, and also provide a positive reference value for the construction technology of multi-layer logistics warehouse.
Research on RCS Jet Interaction Characteristics of the Capsule Entry Vehicle at Subsonic and Transonic Speed
Authors: Zhang Jiayue , Ma Jikui , Liu Yaofeng 
Published: December 2022

Abstract
In this paper, the RCS jet interaction characteristics of the capsule entry vehicle were studied by numerical simulation. The jet interference characteristics under different re-entry ballistic parameters were compared. The influence of the angle of attack on the jet flow field structure and aerodynamic characteristics was analyzed.