bluuebunny/crossref_metadata_2025_split huggingface dataset:
Parameters Optimization for the Control of Energy Coupler Actuator based on Finite Element Method
Authors: Yang Chenghao , Dai Jin , Xiong Shaoping 
Published: February 2023

Abstract
In this paper, the multi-physics coupled model of the energy coupler actuator (ECA) based on finite element method is built in COMSOL. To achieve some determined indicators, Peak-Hold drive strategy is applied to replace the constant voltage driving plan. Consequently, several groups of Peak-Hold signals are inputted. And the simulation results are analyzed to obtain the optimal parameter sets under the specified target performance. The driving parameters of the model are optimized, resulting in an overall performance improvement. Finally, a solution to find an ideal driving strategy with minimum energy consumption is found in this paper.
Multi-target Emergency Rescue Path Planning in Marine Wind and Wave Environments
Authors: Sun Zhi , Yu Yuanyuan , Mei Yiying , Xiao Xunqiao , Shi Zicang 
Published: February 2023

Abstract
With the development of marine-related industries, the number of tasks at sea has increased, and accidents there happen more frequently as well. Search and rescue are very challenging because of the extreme wind and wave environment at sea. Therefore, the state has been paying more attention to maritime emergency rescue. One part is emergency rescue path planning, which is crucial for helicopter emergency rescue at sea. In this paper, a series of multi-target rescue path solutions are created in order to solve the challenge of multi-target rescue path planning while taking into account sea wind and waves. The rescued targets’ floating trajectory model is first established. Then, a recursive algorithm based on a permutation tree is given in response to the unsteady change of the targets’ position at sea. The rescue path is planned with the goal of cutting down on the helicopter’s search time. Finally, using the multi-target rescue in China’s Taiwan Strait as an example, it is discovered that the overall time needed for the multi-target rescue is decreased by 7.03 minutes, and the efficiency of the rescue is improved by 13.3% in the wind and wave environment at sea. According to the research, the optimal rescue path shortens the time required for multi-target rescue at sea while increasing the effectiveness of helicopter rescue operations.
Failure Analysis of a Deep Pit on the Inner Wall of Water Wall Tube in a Power Plant
Authors: Zhang Yiwen , Fang Lulu , Tao Kangning , Chu Xi , Dai Zhen 
Published: February 2023

Abstract
A deep pit on the inner wall of a water wall tube of a 600MW boiler was found at the extension end of the front of the furnace during an overhaul after 200 thousand hours of operation. To investigate the causes of the failure, various techniques including macroscopic inspection, chemical composition analysis, microstructural analysis, mechanical performance testing, scanning electron microscope (SEM) observation and energy dispersive spectroscopy (EDS) analysis were carried out. The results of investigations showed that the chemical composition of the as-received tube conformed with SA-178 Grade C and the mechanical properties were qualified. EDS analysis revealed that the main elements of the deposit on the surface of the pit were iron and oxygen, along with phosphorus, potassium and aluminium, which were identified with the constitutes of the under deposit corrosion products. Based on the results, the cause of the failure is under deposit corrosion. Possible measures to combat the corrosion were proposed.
An Anti-disturbance Control Algorithm for Permanent Magnet AC Servo System
Authors: Liu Huan , Zhang Xiaomin , Guo Lanjie , Che Mingshuo 
Published: February 2023

Abstract
Permanent magnet AC servo system is widely used in aerospace, industrial robots, petrochemical equipment and so on. In order to improve the anti-interference control performance of the permanent magnet AC servo system, in this paper, a non-singular terminal sliding mode controller based on the extended state observer is designed for the permanent magnet synchronous motor control system using the resolver as the angle sensor. The proposed algorithm uses the extended state observer to observe disturbance while realizing demodulation, and then uses the non-singular terminal sliding mode controller to realize high-precision anti-interference speed control. The proportion of the symbol term in the sliding mode controller can be reduced by compensating the disturbance observation term, thereby effectively suppressing the sliding mode chattering and improving the anti-interference performance of the system. Simulation results show that the proposed method has better control performance than the traditional PID control method in both steady-state accuracy and dynamic performance.
Research on Modeling and Control Algorithm of Self-Balancing Platform of Spraying Robot
Authors: Ye Fan , Su Yuanping 
Published: February 2023

Abstract
In order to improve the driving stability of the tracked vehicle robot with agricultural spray in mountainous complex terrain, an automatic leveling device of the medicine box was designed to adjust the center of gravity of the tracked vehicle during driving by controlling the sidle Angle of the tracked vehicle. Because in the spraying process, the liquid in the medicine box is constantly reduced, which produces a certain load disturbance to the control system. In this paper, an adaptive controller is designed based on the mathematical model of self-balancing platform. Experiments in Matlab/Simulink show that the control method can effectively control the system.
Design of Spaceborne Stepper Motor Driver Based on FPGA
Authors: Zhang Chao , Zhang Ai , Chen Huanhong , Li Jing , Zhang Xiaomin , Jiu Yuanwei 
Published: February 2023

Abstract
In order to meet the specific application requirements of stepper motor in space optical remote sensor, such as large load current, low operating frequency, sufficient safety margin, anti radiation and other space environment indicators, a spaceborne stepper motor driver based on antifuse Field Programmable Gate Array (FPGA) is designed. The driver consists of power conversion module, control module, drive module, and position detection module. Using P-channel Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) and N-channel MOSFET to design bipolar drive circuit, the driver hardware circuit is simple and the software resource occupancy rate is low. Through the experiments of the dual functions of logic protection circuit in hardware and dead zone protection in software, it is verified that the design of spaceborne stepper motor driver based on FPGA meets the requirements of space optical remote sensor mechanism control.
Structural Design and Simulation Analysis of Quadruped Tree Climbing Robot
Authors: Jiang Hancheng , Yu Baojun , Qi Xin , Pan Chenhao , Yang Jinfeng 
Published: February 2023

Abstract
Aiming at the problems of large size and complex structure of the existing tree-climbing robot, a new structure of the quadruped tree-climbing robot is designed based on the structure of the existing quadruped tree-climbing robot. We established a mathematical model using robotics, and carried out a positive kinematics analysis of the overall structure. The finite element simulation analysis of the key components and the simulation and verification of the transmission core components are carried out. The overall structure of the redesigned four-legged tree climbing robot is simple, weight, small endurance, high endurance and high finite element results show the grasping mechanism The reasonable stress distribution of the frame design is more uniform, and the robot has strong stability in the process of climbing trees.
The EMC Design of Flap and Slat Electronic Control Unit
Authors: Han Bing 
Published: February 2023

Abstract
A brief description of EMC (electromagnetic compatibility) design in FSECU (Flap and Slat Electronic Control Unit) is proposed. FSECU (Flap and Slat Electronic Control Unit) is the core component of High Lift System. The FSECU’s EMC design for case, I/O interface circuit, ground and PWB is described in detail. In parallel, the analysis for the electromagnetic environment difference of HLS is proposed. The EMC design methodology of FSECU is introduced, which includes the chassis, interface circuit, grounding and PWB. The requirements of controlling the electromagnetic leakage and interference are satisfied by using this way. Several tests of DO-160G are to be performed and the EMC requirements need to be met.
Secondary electron emission characteristics of alumina coating on metallic substrate prepared by atomic layer deposition
Authors: Wei Wenlu , Yan Baojun , Heng Yuekun , Liu Shulin , Zhang Binting , Peng Huaxing , Wang Yuman , Wen Kaile 
Published: February 2023

Abstract
The main objective of this study is to research the
secondary electron emission characteristic of different thickness
alumina coatings which are prepared by atomic layer deposition (ALD)
technique on several metallic secondary-emitting materials. The
experimental results reveal that secondary electron yield (SEY)
property concerned with the metal work function and the surface
topography of alumina coatings when coating thickness is in the
nanometer level. In addition, after utilizing SEY measurement setup
and pulsed electron gun, the SEY curves of metallic substrates with
different thickness alumina coatings and primary energy (PE) of
incident electron could be measured. From an analysis of the SEY
curves, some key parameters related to secondary electron emission
characteristics such as the maximum SEY value and its corresponding
PE of incident electron, and the penetration depth of incident
electron can be obtained. Furthermore, basing on the ALD technique
and on the SEY results of stainless steel substrate coated with
80-cycle alumina thin film, a novel 18-stage discrete dynode
electron multiplier (DDEM) was fabricated and tested. The gain of
DDEM 1.6× 106 was obtained.
Robust surface profile envelope estimation using a beam-surface contact model
Authors: Groche T , Seewig J 
Published: February 2023

Abstract
An important tool for the functional characterization of technical surfaces are envelope estimation techniques. This paper describes a new method for generating profile envelope lines based on a simplified beam-surface contact model with intuitive parameterization. The method is closely related to spline filters and shares some of their positive characteristics such as smoothness and robustness against isolated outliers. Unlike spline filters, the proposed method does not calculate mean lines, but envelope lines. Several examples of calculated profile envelopes of sintered surfaces are shown and a comparison with morphological methods, the state-of-the-art method for envelope estimation, is presented.
A novel self-separating silicon nanowire thin film and application in lithium-ion batteries
Authors: Li Haibin , Kato Shinya , Ishii Yosuke , Kurokawa Yasuyoshi , Soga Tetsuo 
Published: February 2023

Abstract
Nano silicon structures are important materials for modern electronic devices and have been widely researched with regard to photoelectricity, thermoelectricity, and lithium-ion batteries. However, since the nano silicon structures fabricated by conventional methods cannot be separated from silicon substrates, reuse of the substrate is restricted. Here, we propose a simple fabrication method to separate the nano silicon structures from the silicon substrates, which allows the reuse of the substrates. The fabrication was processed at room temperature, which allows large-area fabrication and is not restricted by the substrate thickness. Honeycomb structures of different length scales observed on both the nano silicon structure and the substrate suggest that the separation occurred due to the amplification of the silicon crystal defects. The nano silicon structures comprised porous silicon with an excellent specific surface area of 480 m2 g−1 and a mean pore diameter of 5.7 nm. Moreover, the nano silicon structures show good potential as anode materials for lithium-ion batteries wherein the measured reversible capacity was 1,966 mAh g−1 after 100 cycles. Based on the proposed method and morphological characteristics, the fabricated nano silicon structures can be considered a low-cost material with suitable applications in the energy field.
Use of Correct and Incorrect Methods of Accounting for Age in Studies of Epigenetic Accelerated Aging: Implications and Recommendations for Best Practices
Authors: Krieger Nancy , Chen Jarvis T , Testa Christian , Diez Roux Ana , Tilling Kate , Watkins Sarah , Simpkin Andrew J , Suderman Matthew , Davey Smith George , De Vivo Immaculata , Waterman Pamela D , Relton Caroline 
Published: February 2023

AbstractMotivated by our conduct of a literature review on social exposures and accelerated aging as measured by a growing number of epigenetic “clocks” (which estimate age via DNA methylation (DNAm) patterns), we report on 3 different approaches in the epidemiologic literature—1 incorrect and 2 correct—on the treatment of age in these and other studies using other common exposures (i.e., body mass index and alcohol consumption). Among the 50 empirical articles reviewed, the majority (n = 29; 58%) used the incorrect method of analyzing accelerated aging detrended for age as the outcome and did not control for age as a covariate. By contrast, only 42% used correct methods, which are either to analyze accelerated aging detrended for age as the outcome and control for age as a covariate (n = 16; 32%) or to analyze raw DNAm age as the outcome and control for age as a covariate (n = 5; 10%). In accord with prior demonstrations of bias introduced by use of the incorrect approach, we provide simulation analyses and additional empirical analyses to illustrate how the incorrect method can lead to bias towards the null, and we discuss implications for extant research and recommendations for best practices.
Invited Commentary: Cross-Sectional Studies and Causal Inference—It’s Complicated
Authors: Barnett Tracie A , Koushik Anita , Schuster Tibor 
Published: February 2023

Abstract
In this issue of the Journal, Savitz and Wellenius (Am J Epidemiol. 2023;192(4):514–516) discuss the contribution of cross-sectional studies to causal inference when the data are used to address etiological research questions. We elaborate on their thoughts with a discussion of the conditions needed for addressing etiology with the cross-sectional design, using a modern causal inference lens.
NMRtist: an online platform for automated biomolecular NMR spectra analysis
Authors: Klukowski Piotr , Riek Roland , Güntert Peter 
Published: February 2023

Abstract

Summary
We present NMRtist, an online platform that combines deep learning, large-scale optimization and cloud computing to automate protein NMR spectra analysis. Our website provides virtual storage for NMR spectra deposition together with a set of applications designed for automated peak picking, chemical shift assignment and protein structure determination. The system can be used by non-experts and allows protein assignments and structures to be determined within hours after the measurements, strictly without any human intervention.

Availability and implementation
NMRtist is freely available to non-commercial users at https://nmrtist.org.

Supplementary information
Supplementary data are available at Bioinformatics online.
Sex-specific differences in the standard of care for infrarenal abdominal aortic aneurysm repair, and risk of major adverse cardiovascular events and death
Authors: Pouncey Anna L , Sweeting Michael J , Bicknell Colin , Powell Janet T 
Published: February 2023

Abstract

Background
This study investigated whether sex-specific differences in preoperative/perioperative standard of care (SOC) account for disparity in outcomes after elective infrarenal abdominal aortic aneurysm repair.

Methods
This was a retrospective cohort study of elective infrarenal abdominal aortic aneurysm repairs (2013–2020) using depersonalized patient-level National Vascular Registry data. SOC was defined for waiting times, preoperative assessment (multidisciplinary/anaesthetic review), cardiovascular risk prevention, and perioperative medication. The primary outcome was major cardiovascular event and/or death (MACED).

Results
Some 21 810 patients with an infrarenal abdominal aortic aneurysm were included, 2380 women and 19 430 men. Women less often underwent aneurysm repair within SOC waiting times (51.5 versus 59.3 per cent; P &lt; 0.001), but were equally likely to receive preoperative assessment (72.1 versus 72.5 per cent; P = 0.742). Women were less likely to receive secondary prevention for known cardiac disease (34.9 versus 39.6 per cent; P = 0.015), but more often met overall cardiovascular risk prevention standards (52.1 versus 47.3 per cent; P &lt; 0.001). Women were at greater risk of MACED (open: 12.0 versus 8.9 per cent, P &lt; 0.001; endovascular: 4.9 versus 2.9 per cent, P &lt; 0.001; risk-adjusted OR 1.33, 95 per cent c.i. 1.12 to 1.59). A significant reduction in the odds of MACED was associated with preoperative assessment (OR 0.86, 0.75 to 0.98) and SOC waiting times (OR 0.78, 0.69 to 0.87). There was insufficient evidence to confirm a significant sex-specific difference in the effect of SOC preoperative assessment (women: OR 0.69, 0.50 to 0.97; men: OR 0.89, 0.77 to 1.03; interaction P = 0.170) or SOC waiting times (women: OR 0.84, 0.62 to 1.16; men: OR 0.76, 0.67 to 0.87; interaction P = 0.570) on the risk of MACED.

Conclusion
SOC waiting times and preoperative assessment were not met for both sexes, which was associated with an increased risk of MACED. Sex-specific differences in SOC attenuated but did not fully account for the increased risk of MACED in women.
CD4/CD8 Ratio Outcome According to the Class of the Third Active Drug in Antiretroviral Therapy Regimens: Results From the Quebec Human Immunodeficiency Virus Cohort Study
Authors: Sangaré Mohamed N’dongo , Baril Jean-Guy , de Pokomandy Alexandra , Klein Marina , Thomas Réjean , Tremblay Cécile , Pexos Costa , Durand Madeleine , Chawla Seerat , Laporte Louise , Trottier Helen 
Published: February 2023

Abstract

Background
The impact of different therapeutic classes of drugs in antiretroviral therapy (ART) regimens on the CD4/CD8 ratio is not well documented in people treated for HIV. The objective of this study was to analyze the long-term effect of exposure to integrase strand transfer inhibitor (INSTI) on CD4/CD8 ratio compared with nonnucleoside reverse transcriptase inhibitor (NNRTI) or protease inhibitor (PI) among ART-treated persons with HIV (PWH).

Methods
Data from the Quebec HIV Cohort collected from 31 August 2017 were used. Our analysis included all patients in the cohort who received a first or subsequent ART regimen composed of 2 nucleoside reverse transcriptase inhibitors (NRTIs) and a third active drug of a different class (NNRTI, PI, or INSTI) for at least 16 weeks. Marginal structural Cox models were constructed to estimate the effect of different therapeutic classes on the CD4/CD8 ratio outcome.

Results
Among the 3907 eligible patients, 972 (24.9%), 1996 (51.1%), and 939 (24.0%) were exposed to an ART regimen whose third active agent was an NNRTI, PI, or INSTI, respectively. The total follow-up time was 13 640.24 person-years. The weighted hazard ratio for the association between the third active class and CD4/CD8 ratio ≥1 was .56 (95% confidence interval [CI]: .48–.65) for patients exposed to NNRTI + 2 NRTIs and .41 (95% CI: .35–.47) for those exposed to PI + 2 NRTIs, compared with those exposed INSTI + 2 NRTIs.

Conclusions
For people treated for HIV, INSTI-based ART appears to be associated with a higher CD4/CD8 ratio than NNRTI and PI-based ART.
Incidence and oncological implication of adrenal incidentalomas in esophageal cancer patients
Authors: van Doesburg J R , Voeten D M , Kalff M C , van Berge Henegouwen M I , Jol S , van den Bergh J E , Engelsman A F , Gisbertz S S , Daams F 
Published: February 2023

Summary
Adrenal incidentalomas are regularly encountered during imaging for esophageal cancer patients, but their oncological significance remains unknown. This study aimed to describe the incidence and etiology of adrenal incidentalomas observed throughout the diagnostic workup. This retrospective cohort study included all esophageal cancer patients referred to or diagnosed in the Amsterdam UMC between January 2012 and December 2016. Radiology and multidisciplinary team meeting reports were reviewed for adrenal incidentalomas. In case of adrenal incidentaloma, the 18FDG-PET/CT was reassessed by a radiologist blinded for the original report. In case of a metachronous incidentaloma during follow-up, visibility on previous imaging was reassessed. Primary outcome was the incidence, etiology and oncological consequence of synchronous adrenal incidentalomas. This study included 1,164 esophageal cancer patients, with a median age of 66 years. Patients were predominantly male (76.1%) and the majority had an adenocarcinoma (69.0%). Adrenal incidentalomas were documented in 138 patients (11.9%) during the diagnostic workup. At primary esophageal cancer workup, 22 incidentalomas proved malignant. However, follow-up showed that four incidentalomas were inaccurately diagnosed as benign and three malignant incidentalomas were visible on staging imaging but initially missed. Stage migration occurred in 15 of 22 (68.2%), but this would have been higher if none were missed or inaccurately diagnosed. The oncological impact of adrenal incidentalomas in patients with esophageal cancer is significant as a considerable part of incidentalomas changed treatment intent from curative to palliative. As stage migration is likely, pathological examination of a synchronous adrenal incidentaloma should be weighted in mind.
Creativity and Corporate Culture*
Authors: Charness Gary , Grieco Daniela 
Published: February 2023

Abstract
We investigate which form of corporate culture is most effective in enhancing individual performance in creative tasks conducted in group settings. We combine a series of experiments with a questionnaire on corporate values to test whether performance ranking and incentives succeed in instantiating a creative corporate culture. Being ranked against competitors and setting incentives at the group level serves as a social cue that appears to induce in members a significantly stronger pro-social attitude. When this attitude is shared by group members, a social norm of high effort emerges, and creative performance is significantly higher.
Treatment of infected hybrid arch prosthesis with self-assembled bovine elephant trunk grafts
Authors: Reineke David , Makaloski Vladimir , Schoenhoff Florian , Siepe Matthias 
Published: February 2023

Abstract
Graft infections are associated with severe morbidity and mortality. The widespread use of the frozen elephant technique increases the incidence of complex aortic patients to suffer from graft infections. Surgery of these patients is challenging. Removal of the stent graft portion of the frozen elephant technique prosthesis via sternotomy carries the risk of irreparable damage to the descending aorta. There is currently no single-stage surgical strategy that allows for the removal of all infected material apart from a hemi-clamshell approach. This approach is technically demanding and associated with significant morbidity and mortality. This results in conservative treatment in a substantial number of patients. Pericardial tube grafts have shown to be an excellent option in treating graft infections in various aortic segments with promising results concerning freedom of re-infection and survival. We report a single-stage, trans-sternal approach to remove all infected materials and simultaneously treat the descending aorta to prevent aortic catastrophe in 2 consecutive cases.