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Virtual Transmission Solution Based on Battery Energy Storage Systems to Boost Transmission Capacity

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 466-474页

作者： Matías Agüero Jaime peralta Eugenio Quintana Victor Velar Anton Stepanov h.ssein Ash.urian Jean Mah.eredjian Roberto Cárdenas Coordinador Eléctrico Nacional SantiagoChile PGSTech Montreal Canada Ecole Polytech.ique de Montréal Montréal Canada University of Ch.le Santiago Chile IEEE

Th. increasing penetration of variable renewable energy(VRE)generation along with.th. decommissioning of conventional power plants in Ch.le,h.s raised several operational ch.llenges in th. Ch.lean National Power Grid(NPG),including transmission congestion and VRE *** mitigate th.se limitations,an innovative virtual transmission solution based on battery energy storage systems(BESSs),known as grid booster(GB),h.s been proposed to increase th. capacity of th. main 500 kV corridor of th. *** paper analyzes th. dynamic performance of th. GB using a wide-area electromagnetic transient(EMT)model of th. *** GB project,composed of two 500 MVA BESS units at each.extreme of th. 500 kV corridor,allows increasing th. transmission capacity for 15 min during N-1 contingencies,overcoming transmission limitations under normal operation conditions wh.le maintaining system stability during *** dynamic beh.vior of th. GB is also analyzed to control power flow as well as voltage *** results sh.w th.t th. GB is an effective solution to allow greater penetration of VRE generation wh.le maintaining system stability in th. NPG.

关键词： Battery energy storage system(BESS) grid booster transient stability voltage stability electromagnetic transient(EMT)

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

Biodegradability of bioplastics in different aquatic environments:A systematic review

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Journal of Environmental Sciences 2024年第8期142卷 169-181页

作者： maria Cristina Lavagnolo Valentina Poli Anna maria Zampini Valentina Grossule Department of Civil Environmental and Architectural Engineering-Laboratory of Environmental EngineeringUniversity of PadovaLungargine Rovetta 8Padova 35100Italy

Bioplastics were first introduced as environmentally friendly materials,with.properties similar to th.se of conventional plastics.A bioplastic is defined as biodegradable if it can be decomposed into carbon dioxide under aerobic degradation,or meth.ne and CO_(2)under anaerobic conditions,inorganic compounds,and new cellular biomass,by th. action of naturally occurring *** definition h.wever does not provide any information on th. environmental conditions,timescale and extent at wh.ch.decomposition processes sh.uld *** regard to th. aquatic environment,recognized standards h.ve been establish.d to assess th. ability of plastics to undergo biodegradation;h.wever,th.se standards fail to provide clear targets to be met to allow labelling of a bioplastic as ***,th.se standards grant th. user an extensive leeway in th. ch.ice of process *** th.se reasons,th. comparison of results deriving from different studies is *** auth.rs analysed and discussed th. degree of biodegradability of a series of biodegradable bioplastics in aquatic environments(both.fresh.and salt water)using th. results obtained in th. laboratory and from on-site testing in th. context of different research.*** Oxygen Demand(BOD),CO_(2)evolution,surface erosion and weigh. loss were th. main parameters used by research.rs to describe th. percentage of *** results sh.wed a large variability both.in weigh. loss and BOD,even wh.n evaluating th. same type of *** confirms th. need for a reference range of values to be establish.d with.regard to parameters applied in defining th. biodegradability of bioplastics.

关键词： Biodegradation Bioplastic Plastic Natural environment Plastic waste

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

Influence of Omega 3 Fatty Acid Supplementation on Ph.se Angle Values of People Living with.h.V/AIDS with.Lipodystroph. Secondary to Antiretroviral Th.rapy: A Randomized Clinical Trial

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Food and Nutrition Sciences 2024年第1期15卷 58-70页

作者： Th.lita Bandeira Dantas Alline peralta Castro Fernando de Souza Flexa Ribeiro Filh. Rosana maria Feio Libonati Núcleo de Medicina Tropical do Pará Programa de Pós gradua&ccedil&atildeo em Patologia das Doen&ccedilas Tropicais Universidade Federal do Pará Pará Brasil Instituto de Ciências Biológicas e da Saúde Faculdade de Medicina Universidade Federal do Pará Pará Brasil Centro de Ciências Biológicas e da Saúde Universidade Estadual do Pará Pará Brasil

Objective: Th. measurement of ph.se angles is an important monitoring parameter and supplementation with.omega-3 could promote benefits by modulating th. electrical potential of membranes and increasing body cell mass. Th.s study aimed to evaluate th. effectiveness of omega-3 fatty acid supplementation on th. ph.se angle of people living with.h.V/AIDS. Meth.ds: In th.s study, 63 individuals of all genders wh. were undergoing outpatient follow-up and sh.wed lipodystroph. due to h.gh.y active antiretroviral th.rapy were analyzed. Our sample consisted of two groups, one th.t received supplementation containing 2550 mg of omega-3/day (1080 mg of eicosapentaenoic acid and 720 mg of docosah.xaenoic acid) for th.ee month. (n = 32) and anoth.r th.t underwent nutrition guidance (n = 31). Ph.se angle and body cell mass were assessed for both.groups and compared at th. beginning of research.(T0) and after our intervention (T1) for each.group separately. Results: Ph.se angle averaged 6.45° ± 1.06 SD. Th. comparison between T0 and T1 sh.wed a significant increase in ph.se angle and body cell mass, wh.reas th. guidance group sh.wed a decrease in body cell mass at T1 in relation to T0, with.a significant p-value. Variance in ph.se angle between moments sh.wed significant values between T0 and T1 in th. supplementation group for all genders. Conclusion: Omega-3 positively modulated patients ph.se angle and body cell mass, but we emph.size th. need for oth.r studies th.t can solidify knowledge about supplementation dosage and intervention time.

关键词： h.V Lipodystroph. Omega-3 Ph.se Angle

Carbon sequestration in a bamboo plantation:a case study in a Mediterranean area

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Journal of Forestry Research 2024年第3期35卷 231-238页

作者： Tommaso Ch.ti Emanuele Blasi maria Vincenza Ch.riaco Department for Innovation in Biological Agro-Food and Forest Systems(DIBAF)University of TusciaVia San C.De Lellis snc01100 ViterboItaly Foundation Euro-Mediterranean Center on Climate Ch.nge(CMCC) Division on Climate Change Impacts on AgricultureForests and Ecosystem Services(IAFES)Via Garbini5101100 ViterboItaly

In th. Mediterranean region,despite bamboo being an alien species th.t can seriously alter plant and ani-mal biocoenosis,th. area occupied by bamboo plantations continues to increase,especially for th. purpose to seques-ter carbon(C).h.wever,th. C dynamics in th. soil-plant system wh.n bamboo is grown outside its native area are poorly *** we investigated th. C mitigation potential of th. fast-growing Moso bamboo(Ph.llostach.s edulis)introduced in Italy for climate-ch.nge *** analyzed aboveground(AGB)and belowground(as root/sh.ot ratio)biomass,litter and soil organic C(SOC)at O-15-and 15-30-cm depth. in a 4-year-old bamboo plantation in comparison with.th. former annual cropland on wh.ch.th. bamboo was *** h.ve an idea of th. maximum C stored at an ecosystem level,a natural forest adjacent th. two sites was also *** th. plantation,C accumulation as AGB was stimulated,with.14.8±3.1 Mg C h.^(-1) stored in 3 years;because th.nning was done to remove culms from th. first year,th. mean sequestration rate was 4.9 Mg C h.^(-1) a^(-1).Th. sequestration rates were h.gh.but comparable to oth.r fast-growing tree species in Italy(e.g.,Pinus nigra).SOC was significantly h.gh.r in th. bamboo plantation th.n in th. cropland only at th. 0-15 cm depth.but SOC stock did not *** 4 years were not enough.time for a clear increase in SOC,or th. h.gh.nutrient uptake by bamboos migh. h.ve depleted th. soil nutrients,th.s inh.biting th. soil organic matter formation by *** comparison,th. natural forest h.d significantly h.gh.r C levels in all th. *** C dynamics at an ecosystem level,th. bamboo plantation on th. former annual cropland led to substantial C removal from th. atmosph.re(about 12 Mg C h.^(-1) a^(-1)).h.wever,despite th. promising C sequestration rates by bamboo,its introduction sh.uld be carefully considered due to potential ecological problems caused by th.s species in overexploited environments such.as th. Med

关键词： Carbon sequestration Climate ch.nge mitigation Mediterranean area Moso bamboo Soil organic carbon

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