bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and Analysis of New Hydrogen Oxygen Pneumatic Proportional Reducing Pressure Valve
Authors: Yang Dongsheng , Xie Wen , Hu Liming , Chen Chen , Guo Menglei , Zhou Xiaolei , Yang Qingjun 
Published: February 2024

Abstract
The pneumatic proportional pressure reducing valve is the main pressure control component in the fuel cell gas supply system, which directly affects the performance of the entire fuel cell system. Based on the research background of the hydrogen oxygen fuel cell gas supply system, a set of pneumatic proportional pressure reducing valves suitable for hydrogen oxygen gas environments was designed. Through structural design and multi-parameter analysis, the structural parameter design optimization and characteristic analysis of the proportional valve were proposed. It can provide high-precision and high stability gas control capabilities for fuel cell systems, and provide support for engineering applications.
Analysis of Stud Spacing on the Mechanical Behaviour of Steel-Concrete Composite Beam under Uniform Load
Authors: Hu Di , Wu Jingwei 
Published: February 2024

Abstract
The stud spacing significantly affects the bond strength and interracial slip between steel and concrete of thin-walled steel-concrete composite beams, and it interacts with shear lag and shear deformation to affect the structural deflection and sectional stresses. In this paper, a new interracial slip model considering the influence of stud spacing and stud shear stiffness is proposed first, then a potential energy equation of a simply supported steel-concrete composite beam under vertical uniform load considering the coupled effect of interracial slip, shear lag and shear deformation is obtained, and the calculation formulae for structural deflections and sectional stresses are derived, in which the parameter of stud spacing is explicitly shown. The comparison between the observed data in the completed experiment with the theoretical values using the presented formulae and the design code formulae are fulfilled, showing that the presented formulae hold agreeable calculation precise. The proposed formulae can be used to estimate the influence of stud spacing on the mechanical behaviour of steel-concrete composite beams in the preliminary design.
Influence of Heat Treatment on Elinvar Properties of a 40NiCrTiAl Alloy
Authors: Yang Yongzhe , Xu Xiangyu , Wang Xuemin , Shang Chengjia 
Published: February 2024

Abstract
This study investigates the effect of heat treatment on the microstructure and Elinvar properties of a cold-rolled 40NiCrTiAl alloy. This study utilizes optical microscopy, scanning electron microscopy backscattered electron imaging, secondary electron imaging, and energy-dispersive X-ray spectroscopy analysis to observe the precipitation behavior and determine the composition within the material. The results show that the 40NiCrTiAl Elinvar alloy at aging temperatures of 600-700°C, spherical precipitates appear within the grains. At approximately 700°C and with an aging time of around 2 hours, the precipitate volume reaches a peak, and the Young’s modulus and Elastic modulus temperature coefficient also reach their respective peaks. These elastic performance indicators exhibit a strong linear relationship with the degree of precipitate formation. These findings are important for a deeper understanding of the application potential and performance optimization of this Elinvar alloy.
Design of Viscoelastic Damped Plate Structures with a Multi-Material Topology Optimization Method
Authors: Li Zhuang , Huang Qibai 
Published: February 2024

Abstract
A viscoelastic damping layer attached to the plate structure can control vibrations but increases mass. Involving multiple viscoelastic materials, the contribution of different materials needs to be evaluated and allocated. In the paper, a topology optimization model is proposed to find distributions of different viscoelastic materials adopting a multi-material level set method, for maximizing single-order or multi-order modal loss factors. Limited by material volume fraction, the variational principle is applied to establish the velocity field, and the problem is solved by a gradient-based method. Numerical examples are performed to illustrate that loss factors of composite plate structures can be maximized with optimal distributions obtained from the multi-material level set method.
Design and Analyses of a Novel Reconfigurable Logging Branch Mechanism
Authors: Shi Yuanyuan , Peng Jiangying , Liao Yifeng 
Published: February 2024

Abstract
A reconfigurable logging and branch-lopping mechanism has been designed to shorten the production cycle, reduce work intensity, and improve labor survival rate in the logging industry. The mechanism integrating logging and branch-lopping functions can flexibly morph into three con-figurations, namely, series, parallel and mixed, as well as eight structure states to satiate different requirements. Not only does it possess sufficient stiffness to fell large trees but it also offers high flexibility to trim and crop small branches which superior performance has relatively wide engineering application prospects. The kinematics and static stiffness of the mechanism are the key techniques for its engineering application. With the mechanism as the research object, the working principles were analysed and the adjacency matrix of each structure state was presented. The Screw Theory and CGK formula were deployed to calculate the degrees of freedom of some of the structure mechanisms. The kinematics of some of the structure states was analysed and their flexibility matrices were obtained with vector algebra. The static stiffness of two structure states was compared indirectly by contrasting their flexibility matrices before their kinematics was simulated numerically. Engineering application of the mechanism in welding robots, robots that pick up objects, cleaning robots and other fields is demonstrated towards the end of this paper.
Unsupervised Deep Transfer Learning Method for Rolling Bearing Fault Diagnosis Based on Improved Convolutional Neural Network
Authors: Xu Fan , Hong Duo , Tian Yawen , Wei Naizhen , Wu Jianwei 
Published: February 2024

Abstract
As a critical component widely used in mechanical equipment, the implementation of intelligent fault diagnosis for rolling bearings can improve the reliability of equipment. In this paper, a method named JMMD-CKDSCNet is proposed to address the task of fault diagnosis under unsupervised domain discrepancy scenarios. First, the convolutional kernel dropout (CKD) mechanism is introduced in the convolutional layer, and partial convolutional kernel weights are set to be inactive during the training process using the random mask. Second, skip connection (SC) fuses the features of multiple shallow layers to preserve and transfer the original features. Finally, domain alignment is achieved using joint maximum mean discrepancy (JMMD), which measures the joint distribution between different domains with feature discrepancies under the condition that the target domain lacks labeled data. The experimental results demonstrate that CKDSCNet exhibits superior generalization performance and outperforms other models in terms of diagnostic accuracy and model performance. Compared with other domain adaptation methods, JMMD has significant superiority, proving the application value of JMMD-CKDSCNet.
Research on the Failure Mechanism and Solution Strategy for Friction Braking of Electric Hoists
Authors: Wang Songlei , Liu Fang , Jin Hui 
Published: February 2024

Abstract
The electromagnetic braking motor, which combines cylindrical motors with electromagnetic brakes, has gradually been widely used in the lifting mechanism of electric hoists. This configuration of electric hoists usually has a large difference in lifting speed between fast and slow, and the highest speed can reach the lowest speed Liu Bei. During the process of rapid sudden braking and sudden switching between fast and slow speeds, it is easy to generate a large amount of braking slip, posing a huge challenge to friction braking. In response to the issue of excessive brake slip of a wire rope electric hoist, the mechanism causing the excessive brake slip was analysed, and a solution was provided. This paper analyses the methods of shortening braking time and reducing braking slip from mechanical, electrical, and control aspects, with a focus on the impact of rectifier and brake response delay on braking deceleration time and braking slip amount.
Research on the Cumulative Damage Law of Surrounding Rock under Cyclic Blasting Action
Authors: He Rui 
Published: February 2024

Abstract
In order to study the cumulative damage characteristics and laws of rock masses under cyclic blasting loads, based on the finite element software ANSYS/LS-dyna and the HJC constitutive model, a single blasting damage analysis is conducted first, and the accuracy of the results is verified. On this basis, numerical simulation studies on the cumulative damage of rock masses under cyclic blasting are carried out separately. The results indicate that the cumulative damage evolution cloud map of the rock mass under cyclic blasting is similar to that of a single blasting action, showing an inverse S-shape overall. The damage increment of the rock mass decreases with the increase of blasting times, and in the central area of the damage zone, the rock mass is particularly affected by the superimposed effect of cyclic blasting loads. Cyclic blasting fully reflects the accumulation of damage to the rock mass under multiple cyclic blasting loads, and there is a certain relationship between rock mass damage and the distance between the blasting centers. As the distance between the blasting centers increases, the amount and increment of rock mass damage generated by blasting continue to decrease.
Influence of Blasting on Anchoring Force of Long Anchor Cable Passing through the Karst Cave
Authors: Zhao Yiwei , Xu Lin , Wang Fei , Ye Chenmin 
Published: February 2024

Abstract
In order to study the effect of blasting on the anchoring force of long anchor cable through the karst cave, numerical simulation method is used, relying on a subway station pit support project, respectively, to explore the location of the karst cave, the diameter of the karst cave and the modulus of elasticity of the karst cave filler on the anchoring force of the long anchor cable through the karst cave under the effect of blasting. The results show that when the anchor cable anchoring section through the length of the karst cave the longer or the smaller the modulus of elasticity of the karst cave filler, the smaller the loss of anchor cable anchoring force before and after blasting; when the core of the karst cave and the distance from the pile is 10m, the loss of anchor cable anchoring force is the smallest; when the diameter of the karst cave is 4.46m or the modulus of elasticity of the karst cave filler is 13.3MPa, the void effect of the cavity absorbs the blasting energy, and the anchor cable anchoring force will not be lost after the blast. not be lost.
Research on Position Error Prediction and Compensation of Direct Drive Turntable Based on WOABP Network
Authors: Chen Xiumei , Liu Jiachi , Lin Haochun , Xu Youmin 
Published: February 2024

Abstract
A method to identify the position error of direct drive numerical control turntable by measuring current and eccentric load is proposed, and the position error model of direct drive numerical control turntable based on whale Optimized BP (WOABP) neural network is established. The test-bed is built to measure the current, eccentric load and position error. The measured current and eccentric load are trained by WOABP neural network, and the position error of direct drive numerical control turntable is obtained. By comparing the original error, the error obtained by BP neural network and the error obtained by WOABP neural network, the effectiveness of WOABP neural network model is verified. The position error of direct drive numerical control turntable is compensated by the error obtained by the model.
Design and Improvement of the Connection Between the Steel Wire Rope and Shell for Cobalt-60 Afterloading Source Whip
Authors: Yang Dacai , Lin Yutong , Li Junlin , Zhu Wenlian 
Published: February 2024

Abstract
This article studied a novel connection method between the steel wire rope and the outer shell of a cobalt-60 afterloading brachytherapy source delivery whip. The performance requirements for the connection between the steel wire rope and the shell are described by analyzing the structural characteristics and usage environment of the source whip. Multiple joint forms and process ideas are proposed and explored. After repeated testing and improvement, a set of embedded adhesive bonding connection methods is finally proposed. The small-diameter cobalt-60 afterloading radiation source whip produced by this method meets the requirements of experimental verification and clinical use, effectively solving the problem of connection between the radiation source shell and steel wire rope.
Optics design and correction challenges for the high energy booster of FCC-ee
Authors: Chance A. , Dalena B. , Da Silva T. , Mashal A. , Migliorati M. , Ghribi A. , Rajabi A. , Zimmermann F. 
Published: February 2024

Abstract
One of the major upcoming challenges in particle physics is
achieving precise measurements of the Z, W, and H bosons, as well as
the top quark. To meet these targets, the next e+e- collider complex, FCC-ee, will need to achieve unprecedented
luminosities. The FCC-IS European Study is investigating the
feasibility of these challenges, with a cornerstone of the study
being the design and optimization of the high-energy booster
(HEB). This paper provides an update on the status of the HEB of
FCC-ee in light of recent developments in the injector and collider
survey, as well as an overview of ongoing work on longitudinal
stability and design robustness in relation to field, alignment, and
diagnostics errors. Constraints and effects related to the design
frequency of the accelerating cavities, as well as collective
effects, are also highlighted. Lastly, the paper presents an
investigation into an alternative arcs cell design.
Plan for development of circular colliders with Crab Waist at BINP
Authors: Bogomyagkov A. , Levichev E. , Sinyatkin S. 
Published: February 2024

Abstract
All modern electron-positron collider designs use Crab Waist
collision scheme as a basic principle for substantial luminosity
increase. However, this approach has strong demands on beam dynamics
and technical collider design, which are very difficult to
satisfy. This paper discusses a program to study fundamental
features of Crab Waist collision scheme at Budker Institute of
Nuclear Physics.
Touschek lifetime and luminosity optimization for Russian Super
Charm Tau factory
Authors: Bogomyagkov A. , Levichev E. , Sinyatkin S. 
Published: February 2024

Abstract
Electron-positron collider Super Charm Tau factory is
planned to be built in the National center for physics and
mathematics, Sarov. It is a double ring collider with crab waist
collision scheme operating in wide beam energy range from 1.5 GeV
to 3.5 GeV with peak luminosity of 1035 cm-2s-1. The polarized electron
source and three Siberian Snakes provide 80% longitudinally
polarized electron beam at 2 GeV. Superconducting wigglers
decrease damping times, effects of intra-beam scattering and
increase Touschek beam lifetime, particularly at low energy. The
paper presents the status of collider design and optimization of
luminosity and beam lifetime.
Beam injection and beam quality in injector LINAC and in beam transport lines at SuperKEKB
Authors: Funakoshi Y. , Iida N. , Kikuchi M. , Mori T. , Natsui T. , Ohnishi Y. , Satoh M. , Seimiya Y. , Yoshimoto T. 
Published: February 2024

Abstract
At SuperKEKB, the maximum beam currents and the luminosity
could be limited by the beam injection in the near future. We
estimated requirements to the beam injection to achieve the next
target luminosity of 1 × 1035cm-2s-1. Two cases of β
y
* = 1 mm and
0.8 mm are considered. A simulation shows that we need to suppress
the emittance growth of the injecting positron beam in the beam
transport (BT) line down to its design value to meet the requirement
with β
y
* = 1 mm. In the case of β
y
* = 0.8 mm, we
need to improve dynamic aperture of LER in addition to the
suppression of the emittance growth. Efforts to improve the beam
quantity and quality in LINAC and in BT are summarized. The present
most serious problem concerning quality of the injecting beams is
emittance growth in the BT lines for both electron and positron
beams. Simulations and experiments show that the effects of ISR and
CSR in the BT lines cause a large horizontal emittance growth of the
electron beam. Several measures to suppress the emittance growth are
under considerations.
Geodetic, survey and alignment challenges of the FCC-ee
Authors: Mainaud Durand H. , Watrelot L. , Weyer B. 
Published: February 2024

Abstract
At CERN, each generation of particle accelerators led to the
implementation of new geodetic, survey and alignment methodologies
following the increasing accuracy requirements and the evolution of
survey instruments. The Future Circular Collider (FCC), representing
the next generation of particle accelerator, will in its turn
require new development to ensure the accomplishment of the
construction of the 91 km tunnel and the correct positioning of the
machine components. Mainly because of larger size of the machine but
also due to the design of its components, the existing geodetic
infrastructure has to be extended and upgraded. The accelerator
component alignment methodology currently used in not scalable, and
the Machine Detector Interface alignment procedure must be revised
including monitoring of the alignment. The article summarizes the
different aspects of the geodetic, survey and alignment challenges
that are currently investigated during the FCC feasibility studies.
First considerations on the supporting structures of FCC-ee booster and collider in the arc regions
Authors: Carra F. , Baudin L. , Bauche J. , Artoos K. , Atieh S. , Bertarelli A. , Brunner O. , Capatina O. , Chance A. , Chemli S. , Corso J.P. , Coupard J. , Dalena B. , Di Castro M. , Etheridge J. , Garion C. , Grillot S. , Guinchard M. , Hanke K. , Eriksson C.J. , Kersevan R. , Losito R. , Mainaud Durand H. , Niewiem W. , Oide K. , Osborne J. , Raubenheimer T. , Rorison S. , Tetrault C. , Timmins M. , Tock J.-Ph. , Valchkova-Georgieva F. , Von Freeden L. , Zimmermann F. 
Published: February 2024

Abstract
In 2022, the FCC Feasibility Study management mandated a
working group to analyse the best configuration of the FCC-ee tunnel
in the arc regions, in view of the construction of a mock-up of the
arc half-cell. One of the main and most challenging goals of the
study, named FCC-ee Arc Half-Cell Mock-up Project, was to
perform a preliminary investigation on the principles of supporting
the Short-Straight Sections and dipoles of the half-cells, both for
the booster and for the collider machines. This is an important
input needed for the choice of the best configuration of the
relative placement of the booster with respect to the collider. The
structural stiffness, mass and stability of the supporting
structures must be optimized to minimize the vibrations
transmitted/transferred to the magnetic system of the accelerators
by elements such as pumps, water cooling system, beam
thermomechanical stresses, powering elements, etc. To perform the
study, tools such as CAD software, FEM and analytical techniques
were employed. This paper summarizes the preliminary design concepts
and the results of the simulations performed.
CEPC survey and alignment
Authors: Wang Xiaolong , Li Yuhui , Dong Lan , Wang Tong , Liang Jing , Ma Na , Yao Yibin 
Published: February 2024

Abstract
For CEPC such big size machine survey and alignment, several
key issues need to be considered: the measurement and data
processing method, error accumulation control, the global and
relative accuracy, the measurement efficiency, component alignment
method and the deformation problem. To these issues an overall
survey and alignment scheme was made. The global datums will be
established for the measurement and data reduction. A multi-level
control network will be built for the global and relative position
control, the establish method and measurement method are introduced
and the accuracies are estimated. To the component alignment, the
schemes of fiducialization, pre-alignment and tunnel alignment are
introduced, the deformation problem was analysed and monitor
equipment will be applied. To improve the measurement efficiency a
new kind of instrument was designed, the prototype has been
fabricated and some experiments has been carried out.
Qualitative behaviors of a four-dimensional Lorenz system
Authors: Zhang Fuchen , Xu Fei , Zhang Xu 
Published: February 2024

Abstract
In this paper, the qualitative behaviors of an important four-dimensional Lorenz system with wild pseudohyperbolic attractor that proposed in (Gonchenko et al 2021 Nonlinearity
34 2018–47) are considered. Here, we prove that the four-dimensional Lorenz system with varying parameters is global bounded according to Lyapunov’s direct method. Furthermore, we provide a collection of global absorbing sets, where in addition we obtain the rate of the trajectories going from the exterior to the global absorbing set. In particular, we solve the critical case

k
→

0

+

that cannot be resolved by using the previous methods. The fundamental qualitative behaviors are analyzed theoretically and numerically. We present bifurcation diagrams to further explore the complicated dynamical behaviors of this system. The period-doubling bifurcation phenomenon is found. To illustrate the efficiency of our method, we present numerical simulations to show the validity of our research results. Finally, we present some applications of our research results in this paper.
Walkability assessment and pedestrian way planning on Mercedes Benz Road Corridor, Cicadas, Bogor Regency
Authors: Hayati N N , Sulistyaningtyas G , Nawir Daud , Ishak S Z 
Published: February 2024

Abstract
A pedestrian way is a space for pedestrians to walk safely. Walkability is a conceptual term for measuring connectivity and quality levels of various pedestrian ways. Walkability assessment can be measured by assessing the infrastructure available for pedestrians. The Mercedes Benz Road, Cicadas, Bogor Regency is the location used as the research object. It is used as a research location because the land use is dominated by trade and services as many as 116 units and industry as many as 26 units. A large enough demand is not balanced with the procurement of pedestrian facilities that are adequate. This study aims to determine the level of walkability and the need for pedestrian walkways. The method used is the Global Walkability Index and the Greenshields model. The results of this study found that all segments are slightly walkable. In segment 1, 1.5 m and 2 m wide sidewalks were designed. In segment 2, 1.5 m and 1.7 m wide sidewalks were intended, and in segment 3, 2 m wide sidewalks were designed on each side.