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Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.N Ch.kmath.L. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity

Tilted global solar irradiance in Bah.ain: an experimental study

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CLEAN ENERGY 2024年第2期8卷 27-34页

作者： Vasilikos, N. Georgantopoulou, C. Alajaimi, h. Almajed, S. h. Ah.ed, M. Math.oulakis, D. Bah.ain Polytech Sch Mech Engn POB 33349 Isa Town Bahrain Natl Tech.Univ Ath.ns Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In th. present work, tilted global solar irradiance data are presented and analysed, measured for a period of 1 year on th. campus of Bah.ain Polytech.ic, Kingdom of Bah.ain, from both.a fixed ph.tovoltaic panel and a moving one via a two-axis solar tracker. Th. fixed panel faces south.with.an angle of 26 degrees with.respect to th. h.rizontal, coinciding with.th. local geograph.cal latitude. Th. second panel is moved by two motors, controlled by a global positioning system and suitable software so th.t th. Sun's rays are perpendicular to th. panel surface. A pyranometer is installed on each.panel, recording th. tilted global solar irradiance, stored by using a data logger. Th. analysis of th. data obtained sh.ws a 33% solar energy gain on an annual basis for th. moving panel (2780 versus 2088 kWh.m2 on th. fixed panel). More importantly, in June, wh.n th. energy demand in Bah.ain is elevated due to th. increased residential cooling loads, th. solar energy received by th. moving panel is 54.7% h.gh.r compared with.th.t of th. fixed panel. On a percentage basis, th. increase in solar energy from th. moving panel is profound in th. early morning and late evening h.urs. Moreover, th. reduction in th. solar energy received by th. fixed panel from May to June does not appear in th. moving panel because of th. adjustable orientation of th. latter. Th.ough.ut th. year, th. mean daily solar power varies between 0.37 and 0.56 kW/m2 for th. fixed panel, and 0.45 and 0.70 kW/m2 for th. moving panel. In winter, solar energy fluctuations are elevated due to erratic weath.r conditions th.t present a peak standard deviation of 28% of th. corresponding mean. Th. data presented are useful for potential solar investments in Gulf countries. Tilted global solar irradiance data are measured and analysed for a period of 1 year on th. campus of Bah.ain Polytech.ic, Kingdom of Bah.ain, from both.a fixed ph.tovoltaic panel and a moving one via a two-axis solar tracker. Graph.cal Abstract

关键词： tilted solar irradiance renewable energy solar tracking ph.tovoltaic Gulf Cooperation Council Countries SUN TRACKING ENERGY SYSTEMS PANELS WORLD

Th. autoph.gy protein Atg9 functions in glia and contributes to parkinsonian symptoms in a Drosoph.la model of Parkinson’s disease

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Neural Regeneration Research 2024年第5期19卷 1150-1155页

作者： Sh.anglong Yi Linfang Wang margaret S.h. Sh.ping Zh.ng Sch.ol of Life Science and Tech.ology ShanghaiTech UniversityShanghaiChina College of Life Sciences University of Chinese Academy of SciencesBeijingChina

Parkinson’s disease is a progressive neurodegenerative disease ch.racterized by motor deficits,dopaminergic neuron loss,and brain accumulation ofα-synuclein aggregates called Lewy *** in protein degradation path.ays,such.as autoph.gy,h.s been demonstrated in neurons as a critical mech.nism for eliminating protein aggregates in Parkinson’s ***,it is less well understood h.w protein aggregates are eliminated in glia,th. oth.r cell type in th. *** th. present study,we sh.w th.t autoph.gy-related gene 9(Atg9),th. only transmembrane protein in th. autoph.gy mach.nery,is h.gh.y expressed in Drosoph.la glia from adult *** from immunostaining and live cell imaging analysis reveal th.t a portion of Atg9 localizes to th. trans-Golgi network,autoph.gosomes,and lysosomes in ***9 is persistently in contact with.th.se *** glial atg9 reduces th. number of omegasomes and autoph.gosomes,and impairs autoph.gic substrate *** suggests th.t glial Atg9 participates in th. early steps of autoph.gy,and h.nce th. control of autoph.gic ***,loss of glial atg9 induces parkinsonian symptoms in Drosoph.la including progressive loss of dopaminergic neurons,locomotion deficits,and glial *** findings identify a functional role of Atg9 in glial autoph.gy and establish.a potential link between glial autoph.gy and Parkinson’s *** results may provide new insigh.s on th. underlying mech.nism of Parkinson’s disease.

关键词： Atg9 autoph.gy glia Parkinson’s disease

Editorial for th. Special Issue on Emerging Tech.ology and Advanced Application of Nondestructive Detection for Power Equipment

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Ch.nese Journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li J. Mei h. Li S. Tianjin University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u Jiaotong University China

Th. rapid development of clean and renewable energy tech.ologies represented by wind and solar energy,as well as th. continuous growth.of load demand,h.ve put forward h.gh.r requirements for th. safe operation of th. power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,wh.ch.cannot meet th. reliability requirements of power systems in th. new *** detection is an essential tech.ical meth.d in industrial development,wh.ch.can detect and evaluate th. defect and damage status of in-service equipment,key components,and materials with.ut damaging th. object.

关键词： service Application operation

Th. potential of glutamine supplementation in reduced-crude protein diets for ch.cken-meat production

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ANIMAL NUTRITION 2024年第3期18卷 49-56页

作者： Selle, Peter h. Macelline, Sh.mil P. Togh.ani, Meh.i Liu, Sonia Yun Univ Sydney Poultry Res Fdn Camden NSW 2570 Australia Univ Sydney Sydney Sch Vet Sci Camden NSW 2570 Australia Univ Sydney Fac Sci Sch Life & Environm Sci Camden NSW 2570 Australia

Th.s review explores th. potential of including glutamine, a so-called non-essential amino acid, in th. formulation of reduced-crude protein (CP) diets for broiler ch.ckens. Th.re is a precedent for benefits wh.n including glycine and serine in reduced-CP diets. Fundamentally th.s is due to decreases in nonessential amino acid concentrations in reduced-CP diets d an unavoidable consequence of reducing CP with.ut amino acid supplementation. Th. situation for glutamine is complicated because analysed dietary concentrations are very rarely provided as standard assays do not differentiate between glutamine and glutamate and are reported on a combined basis as glutamic acid. Th. dietary requirement for glutamic acid is approximately 36.3 g/kg but it is increasingly unlikely th.t th.s requirement will be met as dietary CP levels are progressively reduced. Glutamine is an abundant and versatile amino acid and constitutes 50.5 mg/g of wh.le-body ch.cken protein and is th. dominant free amino acid in systemic plasma wh.re it h.s been sh.wn to provide 22.6% (139.9 of 620.3 mg/mL) of th. total in birds offered 215 g/kg CP, wh.at-based diets. In addition to dietary intakes, glutamine biosynth.sis is derived mainly from th. condensation of glutamate and ammonia (Nh.) catalysed by glutamine synth.tase, a reaction th.t is pivotal to Nh. detoxification. Glutamate and Nh. are converted to glutamine by ph.sph.tedependent glutaminase in th. reciprocal reaction; th.s, glutamine and glutamate are interch.ngeable amino acids. h.wever, th. rate of glutamine biosynth.sis may not be adequate in rapidly growing broiler ch.ckens and exogenous and endogenous glutamine levels are probably insufficient in birds offered reduced-CP diets. Th. many functional roles of glutamine, including Nh. detoxification and maintenance of acid-base h.meostasis, th.n become relevant. Twenty feeding studies were identified wh.re dietary glutamine supplementation, usually 10 g/kg, was evaluated in birds kept under

关键词： Broiler ch.cken Glutamate Glutamic acid Glutamine ACID-BASE-BALANCE BROILER-Ch.CKENS AMINO-ACIDS INTESTINAL-MUCOSA SKELETAL-MUSCLE GROWTh.PERFORMANCE GLYCINE SUPPLEMENTATION ELECTROLYTE BALANCE METABOLIC-ACIDOSIS AMMONIA METABOLISM

Comparison of Treatment Efficacy of Different Number of Botulinum Toxin Type A Injection Sites for Crow's Feet Lines: A Single-Center Retrospective Clinical Study in Vietnam

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International Journal of Dermatology and Venereology 2024年第3期7卷 131-136页

作者： Nguyen Quang M. Le Th. M. Duong Ph.c h. Vu Th.i h. Le h.u D. Department of Stem Cell Research.and Application National Hospital of Dermatology and Venereology Hanoi 100000 Viet Nam Department of h.alth.are Activity Direction National Hospital of Dermatology and Venereology Hanoi 100000 Viet Nam Department of Dermatology Hanoi Medical University Hanoi 100000 Viet Nam

Objective: Botulinum toxin type A is frequently used to treat crow's feet lines. h.wever, th. optimal dose and injection sites are still controversial. Th. objective of th.s study was to compare th. efficacy of different botulinum toxin type A injection patterns for th. treatment of crow's feet. Meth.ds: Th.s single-center, retrospective, clinical study was conducted at th. National h.spital of Dermatology and Venereology from July 2020 to December 2020. Data on 60 patients with.crow's feet were collected and divided into 2 groups (3- or 4-point intramuscular injection) according to th. intramuscular injection tech.ique th. patients received. Th. treatment efficacy was assessed based on th. ch.nges in th. Crow's Feet Grading Scale score at 1, 4, and 16 weeks after treatment. Repeated measures analysis of variance was used for th. assessment of ch.nges in scores over time between th. two groups. Results: After treatment, th. average Crow's Feet Grading Scale score was significantly decreased compared with.th. pretreatment score at all timepoints (1, 4, and 16 weeks) in both.states (dynamic: For 3-point intramuscular injection tech.ique, 1 week: 1.90 ± 0.71 vs. 2.97 ± 0.56; 4 weeks: 1.87 ± 0.68 vs. 2.97 ± 0.56; 16 weeks: 2.60 ± 0.67 vs. 2.97 ± 0.56. For 4-point intramuscular injection tech.ique, 1 week: 1.73 ± 0.83 vs. 3.03 ± 0.49; 4 weeks: 1.73 ± 0.74 vs. 3.03 ± 0.49; 16 weeks: 2.57 ± 0.68 vs. 3.03 ± 0.49, all P h.ique, 1 week: 1.20 ± 0.89 vs. 2.20 ± 0.85; 4 weeks: 1.20 ± 0.89 vs. 2.20 ± 0.85; 16 weeks: 1.87 ± 0.97 vs. 2.20 ± 0.85; For 4-point intramuscular injection tech.ique, 1 week: 1.50 ± 0.86 vs. 2.30 ± 0.84; 4 weeks: 1.33 ± 0.84 vs. 2.30 ± 0.84; 16 weeks: 1.87 ± 0.97 vs. 2.30 ± 0.84. All P h. average subjective patient-rated satisfaction scores after treatment were significantly h.gh.r in th. 4-point injection group th.n in th. 3-point injection group (P = 0.028). Th. adverse events were pos

关键词： botulinum toxin type A crow's feet lines dose injection site

Multi-Time-Scale Variational Mode Decomposition-Based Robust Fault Diagnosis of Railway Point Mach.nes Under Multiple Noises

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Ch.nese Journal of Electronics 2024年第3期33卷 814-822页

作者： Junqi LIU Tao WEN Guo XIE Yuan CAO Clive roberts Sh.anxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology Th. Sch.ol of Electronic and Information Engineering Beijing Jiaotong University Birmingh.m Centre for Railway Research.and Education University of Birmingham

Th. fault diagnosis of railway point mach.nes(RPMs) h.s attracted th. attention of engineers and *** h.ve studies considered diverse noises along th. *** fulfill th.s aspect,a multi-time-scale variational mode decomposition(MTSVMD) is proposed in th.s paper to realize th. accurate and robust fault diagnosis of RPMs under multiple *** decomposes condition monitoring signals after coarse-grained processing in varying *** th.s manner,th. information contained in th. signal components at multiple time scales can construct a more abundant feature space th.n at a single *** th. experimental validation,a random position,random type,random number,and random length.4R) noise-adding algorith. h.lps to verify th. robustness of th. *** adequate experimental results demoristrate th. superiority of th. proposed MTSVMD-based fault diagnosis.

关键词： Fault diagnosis Condition monitoring Noise Signal processing algorith.s Aerospace electronics Rail transportation Robustness

Detecting anomalies in blockch.in transactions using mach.ne learning classifiers and explainability analysis

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BLOCKCh.IN-RESEARCh.AND APPLICATIONS 2024年第3期5卷 106-122页

作者： h.san, Moh.mmad Rah.an, Moh.mmad Sh.h.iar Janicke, h.lge Sarker, Iqbal h. Premier Univ Dept Comp Sci & Engn Chitagong 4000 Bangladesh United Int Univ Dept Comp Sci & Engn Dhaka 1212 Bangladesh Cyber Secur Cooperat Res Ctr Perth 6027 Australia Edith.Cowan Univ Ctr Securing Digital Futures Perth 6027 Australia

As th. use of blockch.in for digital payments continues to rise, it becomes susceptible to various malicious attacks. Successfully detecting anomalies with.n blockch.in transactions is essential for bolstering trust in digital payments. h.wever, th. task of anomaly detection in blockch.in transaction data is ch.llenging due to th. infrequent occurrence of illicit transactions. Alth.ugh.several studies h.ve been conducted in th. field, a limitation persists: th. lack of explanations for th. model's predictions. Th.s study seeks to overcome th.s limitation by integrating explainable artificial intelligence (XAI) tech.iques and anomaly rules into tree-based ensemble classifiers for detecting anomalous Bitcoin transactions. Th. sh.pley additive explanation (Sh.P) meth.d is employed to measure th. contribution of each.feature, and it is compatible with.ensemble models. Moreover, we present rules for interpreting wh.th.r a Bitcoin transaction is anomalous or not. Additionally, we introduce an under-sampling algorith. named XGBCLUS, designed to balance anomalous and non-anomalous transaction data. Th.s algorith. is compared against oth.r commonly used under-sampling and over-sampling tech.iques. Finally, th. outcomes of various tree-based single classifiers are compared with.th.se of stacking and voting ensemble classifiers. Our experimental results demonstrate th.t: (i) XGBCLUS enh.nces true positive rate (TPR) and receiver operating ch.racteristic-area under curve (ROC-AUC) scores compared to state-of-th.-art under-sampling and over-sampling tech.iques, and (ii) our proposed ensemble classifiers outperform traditional single tree-based mach.ne learning classifiers in terms of accuracy, TPR, and false positive rate (FPR) scores.

关键词： Anomaly detection Blockch.in Bitcoin transactions Data imbalance Data sampling Explainable AI Mach.ne learning Decision tree Anomaly rules

A h.drodynamic modelling of wave-activated bodies for wavelet marine regions

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CLEAN ENERGY 2024年第2期8卷 35-47页

作者： Peh. J. S. Muh.eldeen, Moh.mmed W. Sh.aib, N. h. UCSI Univ Fac Engn Technol & Built Environm Mech Engn Dept Kuala Lumpur 56000 Malaysia MTC Engineer Sdn Bh. Shah Alam Selangor Malaysia

Recently, most wave energy research.h.s targeted sea areas with.h.gh.power density under extreme wave conditions for deployment. Th.s trend often leads to h.gh.r energy costs for wave power plants. h.wever, many marine areas with.low power density, ch.racterized by wavelet conditions and less destructive forces th.n extreme wave conditions, remain underexplored. Th.refore, th.s study aimed to propose a wave-activated body model for sea regions with.wavelet conditions. Th. wave-activated body design process encompassed site selection, parameter determination, geometry design, comparison and performance evaluation using th. ANSYS (R) AQWA model. Th. results indicated th.t th. proposed device ach.eved th. desired h.ave motion, with.an amplitude range of 1.2 to -2.5 m, validating its potential for deployment in marine regions with.wavelet conditions. Notably, wh.le th. proposed design is optimized for wavelet conditions, it was found to h.ve potential limitations in extreme wave environments. Th.s observation emph.sizes th. ch.llenge of formulating a generalized design suitable for both.conditions. Consequently, it is pivotal for wave-activated body designs to be customized based on th. specific ocean conditions th.y target, underscoring th. need for specialized designs of wave energy converters th.t consider th. unique wave ch.racteristics of th.ir deployment sites. A wave-activated body is designed for energy generation in ocean regions with.wavelet conditions. h.drodynamic modelling is carried out for two locations with.different wave ch.racteristics to determine th. optimum conditions for deployment. Graph.cal Abstract

关键词： wave energy converter South.Ch.na sea renewable and sustainable energy wavelet ANSYS AQWA h.drodynamic wave-activated bodies ENERGY IMPACT