bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of cutting parameters based on surface partitioning
Authors: Chen Liangji , Li Zhiguang , Li Huiying 
Published: July 2023

Abstract
With the rapid development of science and technology, five-axis CNC machine tools are widely used in the field of complex surface parts processing and manufacturing, so the part geometry model of the complex surface becomes more and more complex. Most traditional machining methods use fixed cutting parameters to calculate and generate five-axis machining toolpaths. If the fixed cutting parameters are used to generate the 5-axis machining toolpaths, the optimal cutting condition will not be obtained in some parts, and the generated machining toolpaths will be less adaptable. In this paper, the complex surface is partitioned and the cutting parameters are optimally adjusted to different parts of the workpiece during the cutting process to respond to the change in the cutting state.
A Non-thermal De-icing Technique Using Ultrasonic Guided Waves
Authors: Xu Peiyi , Zhang Donglai , Gao Wei , Li Anshou 
Published: July 2023

Abstract
A non-thermal and low-cost ultrasonic de-icing method was applied in this study to solve the problem of ice accumulation on the surface of the structure. Numerical simulation analysis and an experimental test were conducted to confirm the feasibility of non-thermal de-icing. The shear stresses generated by a transducer at different installation locations were calculated in ANASYS simulation software to determine the optimal installation location and excitation frequency of the transducer. The de-icing experiment shows that the ice patch (60mm × 60mm × 4mm) was removed in less than ten seconds notwithstanding in a freezer at - 25 °C. The thermocouple temperature curve shows that the surface temperature of the plate is always below 0 °C. In other words, the icing is removed by force rather than thermal effects. The results of the ANSYS numerical simulation are consistent with those of the experiment, which indicates that the ANSYS numerical simulation provides a good reference for the de-icing experiment. Both the numerical simulation and the experiment confirm that non-thermal de-icing can be realized using a sandwich ultrasonic transducer.
Grinding Path Planning of Abrasive Cloth Wheel Based on Modified Preston Equation
Authors: Gao Zhenchao , Zheng Gang 
Published: July 2023

Abstract
As for the efficient and high-precision grinding of blades, it was studied that a flexible grinding path planning method of the abrasive cloth wheel of the blades. In the paper, based on modified Preston equation, the radial material removal depth model is supplemented, which provides theoretical support for the establishment of the flexible grinding path of the abrasive cloth wheel. After obtaining the abrasive cloth wheel envelope surface by the double parameter sphere family method, the deformation amount of the abrasive cloth wheel is used as the directed distance from the point of the designed surface to the envelope. The sequential linear optimization algorithm is used to optimize the directed distance. Then, the flexible grinding path for constant material removal is obtained. The results of the simulation show that the profile error of the blade processing is improved under the requirements of surface roughness.
Fault Diagnosis Method for Rotating Machinery Based on Improved CBR
Authors: Xie Xuyang , Yang Zichun , Zhang Lei , Wang Jintao , Zeng Guoqing , Wang Xuefeng , Chen Guobing 
Published: July 2023

Abstract
A novel method to detect the faults of rotating machinery using improved case-based reasoning is proposed in this article, which can fully utilize the experience and intelligence of previous cases to realize an intelligent diagnosis. Especially, the identification process of a new fault state is designed to address the problem that the state not included in the case base cannot be automatically recognized. The presented approach is performed to test the gear and bearing datasets. And good diagnosis results are achieved, which verifies the effectiveness of the presented approach.
Design of Aeroengine Air Leak Automatic Monitoring System Based on Infrared Thermography
Authors: Ma Anxiang , Qian Rongrong , Li Yanhong , Xie Qifei , Dong Shaoxuan 
Published: July 2023

Abstract
The aeroengine often suffers from air leaks during the test, which will affect the performance of the aeroengine, thus affecting the test task and even the test safety. In order to make up for the low efficiency and poor real-time of traditional manual detection methods for aeroengine air leaks, a design scheme for aeroengine leakage real-time automatic detection system is proposed. The system uses infrared thermography technology to collect real-time infrared information on the surface of the aeroengine during the test and then generates thermal images. The image processing technology is used to identify the leakage fault and locate the leakage location. Through the design and analysis of the system architecture, composition unit, operation principle and key technologies of the system implementation, the designed air leak monitoring system has high feasibility. Compared with traditional air leak detection methods, the system has the advantages of real-time, automaticity, remoteness, non-contact, non-destructive, simplicity, and intuitiveness, and can significantly improve the efficiency of aeroengine air leak fault detection.
A fault diagnosis method on GWO-SPA and MAE for fault diagnosis of reciprocating compressors
Authors: Li Ying , Wu Shihu , Chen Jiawen , Ba Peng 
Published: July 2023

Abstract
Given the non-stationary and nonlinear features of the reciprocating compressor vibration signal, as well as the problems of end-point effect and modal aliasing existing in the current adaptive decomposition method, the fault diagnosis method for reciprocating compressors based on gray wolf optimization-smoothness priors approach (GWO-SPA) and multiscale attention entropy (MAE) is proposed in this paper. The selection of the regularization parameter λ in the SPA algorithm is studied, and the GWO is introduced to improve the decomposition effect of the SPA method. Then, the entropy value of the MAE is calculated for the detrended term components decomposed by GWO-SPA to describe the fault characteristics quantitatively, and perform PCA dimensionality reduction processing. Finally, the optimized feature vector is input into the SVM. Through the experiments show it is proved that the method proposed can effectively extract the fault state features of reciprocating compressors, and realize the accurate distinction of the fault types of reciprocating compressors.
Cause Analysis and Theoretical Study of Bolt Self-loosening Under a High-temperature Condition
Authors: Li Wenbo , Ding Baoping , Cheng Peng , Li Qing 
Published: July 2023

Abstract
With the wide application of bolt connection, the application environment of the bolt is more and more complicated. The problem of bolt loosening caused by high temperatures cannot be ignored. Based on the research status of domestic and foreign experts, this paper analyzes the causes of high-temperature bolt loosening and introduces theoretical research on this problem. The conclusion is drawn that the factors affecting bolt loosening under high-temperature conditions and the anti-loosening measures are put forward.
Research on Vibration Control of Paired Inclined Nozzles Dynamic Coupled Tubes
Authors: Yang Liang , Qiu Ming , Liao Zhenqiang , Song Jie , Li Zijian , Huang Wenjun 
Published: July 2023

Abstract
The barrel vibrates violently, which will lead to a serious drop in shooting accuracy. To solve this issue, a barrel vibration control method of the paired oblique nozzle dynamic couple is proposed. A pair of inclined nozzle devices are designed on the barrel to fully use the gunpowder gas energy in the chamber during the shooting process. A dynamic couple is generated to balance the turning moment of the barrel weapon. Simultaneously, the recoil force is reduced by exporting the gunpowder gas in the chamber. Therefore, the vibration of the barrel is reduced. Firstly, the internal ballistic two-phase flow model including the gas transient flow model in the vibration control device is modelled based on the internal ballistic theory of two-phase flow. Secondly, the numerical simulation of the weapon launching process is carried out. Thirdly, the rigid-flexible coupling firing dynamics modelling and simulation research is conducted on a 30mm chain gun equipped with a paired oblique nozzle dynamic couple vibration control device. At last, the effects of the device on the continuous firing vibration control of barrel weapons are analyzed. The results show that the vibration reduction efficiency of the inclined nozzle is better than that of the vertical nozzle and the horizontal nozzle. When the angle of the inclined nozzle is 30°, the barrel shows the highest vibration reduction efficiency. The vibration reduction efficiency of each vibration characteristic is 39.2%, 17.1%, 44.8%, and 48.9%, respectively.
Design of Indirect Tire Pressure Monitoring System Based on Wheel Speed Signal
Authors: Huo Bingyuan , Zhang Mengdong , Zhong Shaohua , Zhou Fuzhi 
Published: July 2023

Abstract
Keeping the pressure of the automobile tire in the normal working range is an important guarantee for the safety of the automobile. When the tire leaks, the driver should be reminded to check or replace the tire before the potential danger of blowing out. Aiming at the safety problem of commercial vehicle driving, a set of tire pressure monitoring alarm systems is designed by combining the radius method and frequency method. The magneto-electric wheel speed sensor is used to collect and process the tire speed, and then through the data processing, the full range of monitoring each tire’s possible air leakage hazards, such as emergency can be quickly warned, thus providing a reference for the driver’s driving. The experimental results show that the system can effectively improve the accuracy and stability of tire pressure monitoring.
A Relaxed MPC Method for Non-rigid Shell to Solid Coupling
Authors: Lu Daxing , Zhang Meng , Yang Zhaotong 
Published: July 2023

Abstract
In the finite element model of the water tank without reinforced ribs, most of the water tank structure is constructed with thin-walled parts, which are usually represented by the shell element, and for the local area with a large thickness structure, the usually solid element is used. For this area, the shell element cannot accurately simulate the stress concentration effect, while simulation with the full solid element is very time-consuming because of a large number of FE meshes. The Focus of this paper is to improve computation efficiency while ensuring the accuracy of the calculation. In this paper, a novel MPC method with a relaxed factor is proposed. Compared with the classical shell-to-solid method, the calculation results of the MPC method with relaxation factor are closer to the reference model, while the calculation time is significantly reduced by 42.1 %.
Research on Trajectory Planning and Simulation of Six-Degree-of-Freedom Manipulator
Authors: Jiang Qiang , Zhang Yulian 
Published: July 2023

Abstract
To make the time of the mechanical arm in joint space movement as short as possible and improve work efficiency, it is momentous to plan the movement trajectory of the mechanical arm to content the necessary condition of a smooth movement curve of the mechanical arm. According to the working principle of the 6-DOF mechanical arm, the D-H modeling method is used to calculate the D-H arguments, and the six-degree-of-freedom mechanical arm D-H model is established using MATLAB’s Robotics toolbox, and the positive kinematics analysis is performed. According to the set up robot arm model, the trajectory designning of the mechanical arm to run by using the three-time polynomial interpolation technique and the five-time polynomial interpolation technique in the joint space comparison, and it is simulated in MATLAB. Simulation experiments show that the five-time polynomial interpolation technique makes the running curve of the mechanical arm smoother and more stable, and has more application value.
What surfaces in the operation of noble liquids dark matter detectors
Authors: Pereverzev S. 
Published: July 2023

Abstract
Though noble element dual-phase detectors have a long application history in dark matter searches, some uncertainties and differences in backgrounds persist. We compare effects caused by unextracted electrons on the liquid-gas interface in Xe and Ar dual-phase detectors with a large family of phenomena at the liquid helium surface. We pose that electron and ion accumulation on the liquid surface in detectors can lead to the formation of ordered surface states, charged liquid surface instabilities in an electric field, electrospraying, interactions with surface waves, and other effects. Not only delayed electron emission signals can be generated, but the extraction efficiency for electrons produced below the liquid surface can be altered by the presence of surface charges. Several factors lead to surface electron accumulation, and problems can become more severe with the increased detector size. We discuss possible experiments to reveal surface electron effects and design changes to alleviate electron accumulation. We conclude that studies of these effects are desirable before making final design decisions for the new multi-ton liquid Xe dark matter detector projects like DARWIN, XLZD, and large Ar dual-phase detectors.
Suitability Assessment of CsPbI_3 Dosimeter with ^192Ir Source for Brachytherapy Quality Assurance
Authors: Yang S.W. , Park S.K. , Moon C.W. , Kim K.H. 
Published: July 2023

Abstract
In brachytherapy, quality assurance (QA) is a prerequisite
to minimize the dose irradiation to the healthy tissues in patients
during treatment, as it evaluates the accuracy of the dose applied
to the patients as well as the accuracy of the position of the
irradiation. Therefore, a strong emphasis has been placed on
brachytherapy QA in clinical practice. This study assessed the
suitability of a CsPbI3 dosimeter for the brachytherapy QA
system. To verify the reliability of the unit cell sensor fabricated
with CsPbI3, the electrical parameters were evaluated, after
which the position dependence of the sensor was analyzed. A high
level of reliability (R
2 > 0.99) and reproducibility (relative
standard deviation < 1.5%) were observed. The maximal value
measured at the isocenter of the sensor as the distance of the
dosimeter from the irradiation source was gradually decreased. When
the optimal angle was assessed, the variation was as high as
5.01 nC depending on the form of the 192Ir source. Therefore,
the CsPbI3 dosimeter fabricated in this study is a suitable
substitute for the conventional QA dosimeter.
Effect of spin on the instability of THz plasma waves in field-effect transistors under non-ideal boundary conditions
Authors: ZHANG 张 Liping 丽萍 , LI 李 Jiani 佳妮 , FENG 冯 Jiangxu 江旭 , SU 苏 Junyan 俊燕 
Published: July 2023

Abstract
Terahertz (THz) radiation can be generated due to the instability of THz plasma waves in field-effect transistors (FETs). In this work, we discuss the instability of THz plasma waves in the channel of FETs with spin and quantum effects under non-ideal boundary conditions. We obtain a linear dispersion relation by using the hydrodynamic equation, Maxwell equation and spin equation. The influence of source capacitance, drain capacitance, spin effects, quantum effects and channel width on the instability of THz plasma waves under the non-ideal boundary conditions is investigated in great detail. The results of numerical simulation show that the THz plasma wave is unstable when the drain capacitance is smaller than the source capacitance; the oscillation frequency with asymmetric boundary conditions is smaller than that under non-ideal boundary conditions; the instability gain of THz plasma waves becomes lower under non-ideal boundary conditions. This finding provides a new idea for finding efficient THz radiation sources and opens up a new mechanism for the development of THz technology.
Do Adverse Childhood Experiences Modify the Association Between Disaster-Related Trauma and Cognitive Disability?
Authors: Okuzono Sakurako S , Slopen Natalie , Shiba Koichiro , Yazawa Aki , Kondo Katsunori , Kawachi Ichiro 
Published: July 2023

Abstract
Identifying subpopulations that are particularly vulnerable to long-term adverse health consequences of disaster-related trauma is needed. We examined whether adverse childhood experiences (ACEs) potentiate the association between disaster-related trauma and subsequent cognitive disability among older adult disaster survivors. Data were from a prospective cohort study of older adults who survived the 2011 Great East Japan Earthquake. The baseline survey pre-dated the disaster by 7 months. We included participants who completed follow-up surveys (2013 and 2016) and did not have a cognitive disability before the disaster (n = 602). Disaster-related traumas (i.e., home loss, loss of friends or pets) and ACEs were retrospectively assessed in 2013. Cognitive disability levels in 2016 were objectively assessed. After adjusting for pre-disaster characteristics using a machine learning–based estimation approach, home loss (0.19, 95% confidence interval (CI): 0.09, 0.28) was, on average, associated with greater cognitive disability. Among individuals with ACEs, home loss was associated with even higher cognitive disability levels (0.64, 95% CI: 0.24, 1.03). Losses of friends (0.18, 95% CI: 0.05, 0.32) and pets (0.13, 95% CI: 0.02, 0.25) were associated with higher cognitive disability levels only among those with ACEs. Our findings suggest that individuals with a history of ACEs may be particularly vulnerable to adverse health consequences related to disasters.
Trends in Aesthetic Surgery Fellowship Training: An Analysis of Supply and Demand
Authors: James Isaac , Kochuba Andrew , Grow Jacob N , Ho Isabel , Calobrace M Bradley , Movassaghi Kiya , Zins James E 
Published: July 2023

Abstract

Background
Aesthetic surgery fellowship applications were consolidated under the San Francisco Match in 2018. The impact of these changes on aesthetic program and applicant numbers had not yet been investigated.

Objectives
In this study we sought to evaluate changes in programs, positions, applications, match rates, and fill rates since aesthetic surgery joined the San Francisco Match. We also aimed to compare these trends to craniofacial surgery, microsurgery, and hand surgery fellowships over this same time period.

Methods
San Francisco and National Resident Matching Program (NRMP) match data for aesthetic, craniofacial, microsurgery, and hand fellowships were obtained from 2018 to 2022, and the number of applications, positions, programs, and successful matches were evaluated.

Results
The number of aesthetic fellowship positions increased from 17 to 41 (141%) over the period studied. This resulted in increased match rates and more unfilled positions. Over the same period, fellowship positions for craniofacial, hand, and microsurgery increased by 3.4%, 6%, and 2.5% respectively. There was no increase in applications to any postgraduate subspecialty, nor was there any change in the number of residents pursuing fellowship. Similarly, there was no change in the percentage of fellowship-bound residents applying to any given discipline.

Conclusions
The increase in aesthetic fellowship programs and positions did not generate an increase in applications. Applications to other plastic surgery subspecialties also failed to increase. Unlike aesthetic fellowships, their program numbers have remained stable. Given the limited fellowship applicant pool, our focus should be on enhancing the quality of existing aesthetic programs rather than continuing to increase the number of aesthetic positions.

Level of Evidence: 3
The Skin Necrosis Conundrum: Examining Long-term Outcomes and Risk Factors in Implant-Based Breast Reconstruction
Authors: Hassan Abbas M , Elias Alexandra M , Nguyen Huan T , Nelson Jonas A , Mehrara Babak J , Butler Charles E , Selber Jesse C 
Published: July 2023

Abstract

Background
Mastectomy skin flap necrosis (MSFN) is a common complication following mastectomy that causes significant distress to patients and physicians and also compromises oncologic, surgical, and quality-of-life outcomes.

Objectives
We sought to investigate the long-term outcomes of MSFN following implant-based reconstruction (IBR) and determine the rates and predictors of post-MSFN complications.

Methods
This was a 20-year analysis of consecutive adult (&gt;18 years) patients who developed MSFN following mastectomy and IBR from January 2001 to January 2021. Multivariable analyses were performed to identify factors associated with post-MSFN complications.

Results
We identified 148 reconstructions, with a mean follow-up time of 86.6 ± 52.9 months. The mean time from reconstruction to MSFN was 13.3 ± 10.4 days, and most cases (n = 84, 56.8%) were full-thickness injuries. Most cases (63.5%) were severe, 14.9% were moderate, and 21.6% were mild. Forty-six percent (n = 68) developed a breast-related complication, with infection being the most common (24%). An independent predictor of overall complications was longer time from reconstruction to MSFN (odds ratio [OR], 1.66; P = .040). Aging was an independent predictor of overall complications (OR, 1.86; P = .038); infection (OR, 1.72; P = .005); and dehiscence (OR, 6.18; P = .037). Independent predictors of dehiscence were longer interval from reconstruction to MSFN (OR, 3.23; P = .018) and larger expander/implant size (OR, 1.49; P = .024). Independent predictors of explantation were larger expander/implant size (OR, 1.20; P = .006) and nipple-sparing mastectomy (OR, 5.61; P = .005).

Conclusions
MSFN is associated with high risk of complications following IBR. Awareness of the timing and severity of MSFN and the predictors of post-MSFN complications is crucial for guiding evidence-based decision-making and improving outcomes.

Level of Evidence: 4
How do resource distribution and taxonomy affect the use of dual foraging in seabirds? A review
Authors: Phillips Jessica A , Guilford Tim , Fayet Annette L 
Published: July 2023

Abstract
In many seabird species, parents feeding young switch between short and long foraging excursions in a strategy known as “dual foraging.” To investigate whether habitat quality near breeding colonies drives the use of dual foraging, we conducted a review of the seabird literature, compiling the results of 102 studies which identified dual-foraging in 50 species across nine families from all six seabird orders. We estimated the mean distance from the colony of each species’ short and long foraging trips and obtained remote-sensed data on chlorophyll-a concentrations within the radius of both short and long trips around each colony. We then assessed, for each seabird family, the relationship between the use of dual foraging strategies and the difference in the quality of foraging locations between short- and long-distance foraging trips. We found that the probability of dual foraging grew with increasing differences in the quality of foraging locations available during short- and long-distance trips. We also found that when controlling for differences in habitat quality, albatrosses and penguins were less likely to use dual foraging than Procellariidae, which in turn were less likely to use dual foraging than Sulids. This study helps clarify how environmental conditions and taxon-specific characteristics influence seabird foraging behavior.