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Design and Experimental Testing of a Moving Coil Actuator with Compensation Coil

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 707-716页

作者： Boyuan Yin Xianwu Zeng John Frederick Eastham Emelie nilsson Jean-francois Rouquette Jean Rivenc Ludovic Ybanez Xiaoze Pei Department of Electronics&Electrical Engineering University of BathBathBA27AYUnited Kingdom Airbus UpNext BlangnacFrance Airbus CRT BlangnacFrance Department of Mechanical Engineering University of BathBathBA27AYUnited Kingdom

Hydrogen-powered electric aircraft have attracted significant interests aiming to achieve decarbonization *** DC electric networks are facing great challenges in DC fault protection *** interrupters are widely used in low voltage and medium voltage power systems due to being environmentally friendly with low *** this paper a moving coil actuator with compensation coils for a vacuum interrupter,as part of a hybrid direct current circuit breaker,is designed and experimentally *** coils are used to improve operating speed compared with original moving coil *** between four possible connections of compensation coils and original moving coil actuator are carried *** results show comparisons between different connections of actuator coils in terms of opening time and coil current with a range of pre-charged capacitor *** performance of each actuator connection is also *** actuator with compensation coils is shown to have a higher current rising rate and achieve faster opening speed,which is a critical requirement for electric aircraft network *** parallel connection actuator achieves the highest opening speed within 3.5 ms with capacitor voltage of 50 V.

关键词： Circuit breaker compensation coil moving coil actuator vacuum interrupter

Non-breeding movements of the Black-tailed Gull(Larus crassirostris)

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Avian Research 2023年第2期14卷 206-214页

作者： Huan Xia Cecilia nilsson Kasper Thorup Chenxi Jia Fumin Lei Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing100101China College of Life Science University of Chinese Academy of SciencesBeijing100049China Center for Macroecology Evolution and ClimateGlobe InstituteUniversity of CopenhagenDK-2100CopenhagenDenmark Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming650223China

With the continued development of tracking technology and increasing interest in animal movement,our understanding of migration behavior has become more ***,there are still many species that have not been well studied,particularly sea ***,we present the first year-round Global Positioning System(GPS)tracking data of the Black-tailed Gull(Larus crassirostris)at the population *** used solar-powered GPS-Global System for Mobile communication(GSM)loggers to successfully track 30 individuals breeding at Xingrentuo Islet,Liaoning Province,China,for 1-3 *** for one individual who roamed in the far north of the Yellow Sea during non-breeding period,all others did a directed southward *** routes and wintering sites differed among migrating gulls and between years for the birds tracked for two or more ***,during wintering,the migrating gulls were more likely to travel over a large body of water and shift sites,and some trajectories were quite complex,which was probably closely related to what we observed in the field about their boat-chasing *** to wintering movements,the post-breeding movements ranged over a smaller ***,almost all of them had a long post-breeding period near the breeding islet(≥120days,<220 km from the breeding islet),and 80%of the gulls who were tracked more than one year had at least one faithful post-breeding *** to the post-breeding period,only approximately half of the migrating gulls had a pre-breeding period that was shorter(3-20 days)and closer to the breeding islet(≤80 km).Migration distance varied among migrating gulls(range 209-2405 km)and the gulls moved least distance during postbreeding ***,we found that the southward movement of the migrating gulls occurred when the temperature near the breeding islet dropped;specifically,the gulls directly migrated southward away from the post-breeding *** results suggest that the B

关键词： Black-tailed Gull GPS tracking Larus crassirostris Migration Post-breeding Pre-breeding Sea bird Wintering

Risk factors and outcomes for patients with pancreatic cancer undergoing surgical exploration without resection due to metastatic disease:A national cohort study

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Hepatobiliary & Pancreatic Diseases International 2022年第3期21卷 279-284页

作者： Emil Sahlstrom Paulina Bereza-Carlson Johan nilsson Bobby Tingstedt Bodil Andersson Department of Clinical Sciences Lund SurgeryLund UniversitySweden Department of Surgery Central Hospital KristianstadSweden Department of Translational Medicine Cardiothoracic surgery and bioinformaticsLund UniversitySweden Department of Thoracic and vascular surgery Skane University hospitalLundSweden Department of Surgery Skane University HospitalLundSweden

Background:Unresectable disease is sometimes diagnosed during surgery in patients with pancreatic ductal adenocarcinoma(PDAC).This study aimed to identify preoperative risk factors for metastatic disease diagnosed at surgical exploration and to investigate and compare survival in resected and nonresected ***:Patients were identified from the Swedish National Pancreatic and Periampullary Cancer Registry *** of metastatic disease were evaluated with a multivariable logistic regression model,and survival was evaluated with Kaplan-Meier estimates and log-rank ***:In total,1938 patients with PDAC were scheduled for *** unresectable situation was diagnosed intraoperatively in 399 patients(20.6%),including 234(12.1%)with metastasized *** risk factors for metastasis were involuntary weight loss(OR=1.72;95%CI:1.27-2.33)and elevated carbohydrate antigen 19-9(CA19-9)(35-599 U/m L,OR=1.79,95%CI:1.11-2.89;≥600 U/m L,OR=3.24,95%CI:2.04-5.17).Overall survival was lower among patients with metastasized disease than that among patients with a resectable tumor(P<0.001).Conclusions:Involuntary weight loss and an elevation of CA19-9 are preoperative risk factors for diagnosing metastasized disease during surgical exploration.

关键词： Pancreatic cancer Surgery Metastasized Exploration

Risk profiles and outcomes of patients receiving antibacterial cardiovascular implantable electronic device envelopes:A retrospective analysis

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World Journal of Cardiology 2022年第3期14卷 177-186页

作者： David A Woodard Grace Kim Kent R nilsson Department of Cardiology Piedmont Heart InstituteAthensGA 30606United States Department of Medicine Augusta University-University of Georgia Medical PartnershipAthensGA 30606United States

BACKGROUND Cardiovascular implantable electronic devices(CIEDs)are implanted in an increasing number of patients each year,which has led to an increase in the risk of CIED *** CIED envelopes locally deliver antibiotics to the implant site over a short-term period and have been shown to reduce the risk of implant site *** envelopes are derived from either biologic or nonbiologic *** is a paucity of data examining patient risk profiles and outcomes from using these envelope materials in the clinical setting and comparing these results to patients receiving no envelope with their CIED *** To evaluate risk profiles and outcomes of patients who underwent CIED procedures with an antibacterial envelope or no *** After obtaining Internal Review Board approval,the records of consecutive patients who underwent a CIED implantation procedure by a single physician between March 2017 and December 2019 were retrospectively collected from our hospital.A total of 248 patients within this period were identified and reviewed through 12 mo of follow *** CIED procedures used either no envelope(n=57),a biologic envelope(CanGaroo®,Aziyo Biologics)that was pre-hydrated by the physician with vancomycin and gentamicin(n=89),or a non-biologic envelope(Tyrx^(TM),Medtronic)that was coated with a resorbable polymer containing the drug substances rifampin and minocycline by the manufacturer(n=102).Patient selection for receiving either no envelope or an envelope(and which envelope to use)was determined by the treating *** analyses were performed between the 3 groups(CanGaroo,Tyrx,and no envelope),and also between the No Envelope and Any Envelope groups by an independent,experienced *** On average,patients who received any envelope(biologic or non-biologic)were younger(70.7±14.0 vs 74.9±10.6,P=0.017),had a greater number of infection risk factors(81.2%vs 49.1%,P<0.001),received more high-

关键词： Cardiovascular implantable electronic device envelope Defibrillator Extracellular matrix Implantable cardioverter-defibrillator Infection Pacemaker

Journeys Toward Heaven:An American experiences China's poverty alleviation from fault lines to front lines

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China News Release 2022年第2期 50-54页

作者： Erik nilsson 不详

Sleeping next to yak dung in a Tibetan nomad’s tent beneath a glacier in an isolated swath of Qinghai province’s *** bees in my mouth—that is,deep-fried bugs that“buzz”between chopsticks pinched by ethnic Miao women in Guizhou *** sing,accentuating Z sounds,and wave the“flying”insects in front of guests’faces as they snap at the air until they successfully seize them with their teeth.

关键词： glacier beneath Guizhou

Target blood pressure in diabetes patients with hypertension——What is the accumulated evidence in 2011?

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第8期12卷 611-623页

作者： Peter M.nilsson Department of Clinical Sciences Lund UniversityUniversity Hospital

There is overwhelming evidence that hypertension is an important risk factor for both macrovascular and microvascular complications in patients with diabetes,but the problem remains to identify appropriate goals for preventive therapies.A number of guidelines (the European Society of Cardiology (ESC)/European Association for the Study of Diabetes (EASD) 2007,the Joint National Committee (JNC)-Ⅶ 2003,the American Diabetes Association (ADA) 2011) have for example advocated a blood pressure goal of less than 130/80 mmHg,but this suggestion has been challenged by findings in recent trials and meta-analyses (2011).The European Society of Hypertension (ESH) therefore recommends a systolic blood pressure goal of "well below" 140 *** on evidence from both randomized controlled trials (hypertension optimal treatment (HOT),action in diabetes and vascular disease:preterax and diamicron MR controlled evaluation (ADVANCE),action to control cardiovascular risk in diabetes (ACCORD)) and observational studies (ongoing telmisartan alone and in combination with ramipril global endpoint trial (ONTARGET),international verapamil-trandolapril study (INVEST),treat to new targets (TNT),and the National Diabetes Register (NDR)),it has been shown that the benefit for stroke reduction remains even at lower achieved blood pressure levels,but the risk of coronary events may be uninfluenced or even increased at lower systolic blood pressure *** a recent meta-analysis,it was therefore concluded that the new recommended goal should be 130-135 mmHg systolic blood pressure for most patients with type 2 *** risk factors should also be controlled with a more ambitious strategy applied in the younger patients with shorter diabetes duration,but a more cautious approach in the elderly and frail patients with a number of vascular or non-vascular *** patients from East Asia,such as China,the stroke risk is relatively higher than the risk of coronary *** must al

关键词： Blood pressure Cardiovascular Diabetes Goal Hypertension Treatment

Static/dynamic friction and wear of some selected polymeric materials for conformal tribo-pairs under boundary lubrication conditions

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Friction 2013年第3期1卷 232-241页

作者： Daniel nilsson Braham PRAKASH Bosch Rexroth Mellansel AB MellanselSweden Division of Machine Elements Department of Engineering Sciences and MathematicsLuleåUniversity of TechnologyLuleåSweden

This work is aimed at investigating the friction and wear performance of different polymeric materials having potential for hydraulic system components under lubricated sliding conditions against a steel counter face.A pin-on-disc test configuration was used for the experimental *** different polymeric materials selected for these studies were commercial polyimides(PI),polyether ether ketone(PEEK),and *** of these materials were bulk materials whereas others were used as coatings applied on to the cast iron *** tribological characteristics of the polymers were compared with a reference grey cast *** frictional characteristics were evaluated in both static and dynamic *** results have shown that by using polymeric materials it is possible to reduce breakaway friction by an order of magnitude compared to grey cast ***,the breakaway friction increased significantly after the wear *** polymeric materials having lowest breakaway friction have shown the highest wear with the exception of the PEEK-PTFE coating which showed low *** with graphite fillers also showed low wear but it resulted in relatively high *** carbon fibre reinforced materials resulted in unstable friction as well as higher wear compared to the PI materials with graphite fillers.

关键词： polymer tribology static friction dynamic friction and lubricated wear

Consequences of Insufficient Selectivity in Quantitative and Qualitative Chemical Analysis

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Journal of Analytical Sciences, Methods and Instrumentation 2023年第2期13卷 13-25页

作者： Mats Larsson Göran nilsson Department of Physics Alba Nova University Center Stockholm University Stockholm Sweden

A problem in chemical analysis in connection with measurements of a substance normally occurring in a sample, or identification of a substance which should not exist in a sample, is insufficient selectivity. In this article, we analyze this problem and propose remedies. We use a real doping case to illustrate how chemical noise causes a serious selectivity problem, probably causing a false positive outcome.

关键词： Chemical Analysis Quantitative and Qualitative Selectivity Chemical Measurement Procedures Measurement Errors Chemical Noise

Are flight paths of nocturnal songbird migrants influenced by local coastlines at a peninsula？

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Current Zoology 2014年第5期60卷 660-669页

作者： Cecilia nilsson Johan BACKMAN Thomas ALERSTAM Department of Biology Lund University SE-223 62 Lund Sweden

By recording nocturnally migrating passerines with tracking radar we have investigated how coastlines affect the migrants’ flight paths. Birds could use coastlines as an orientation aid or as a reference cue to compensate for wind drift while migrating. However, on the small scale of Falsterbo Peninsula in southern Sweden, we found very little effect of coastlines on migrants flight paths, irrespective of altitude. We tracked 2 930 migrants in three autumn and two spring seasons, at altitudes from 60 up to 3 000 meters. We compared tracks of migrants flying in three different areas, which correspond to the three main coastlines, and can demonstrate that the orientation of the tracks did not differ in a way consistent with the coastlines between the areas in autumn, and showed only a slight effect in spring. This is in accordance with earlier infrared device monitoring in Fals-terbo, but contrary to earlier visual observations. It supports the view of nocturnally migrating passerines as mainly broad-front migrants. Even though the coastlines on the scale of the peninsula affected the flight paths very little, it is possible that the coastline has an effect on a larger regional scale, by migrants avoiding long sea crossings and thereby being funneled towards the peninsula, but this remains to be investigated.

关键词：飞行路线海岸线移民路径鸣禽跟踪雷达瑞典南部设备监视