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Simulating hydrologic.l responses to c.imate c.ange using dynamic.and statistic.l downsc.ling methods: a c.se study in the Kaidu River basin, Xinjiang, c.ina

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Journal of Arid Land 2018年第6期10卷 905-920页

作者： ba Wulong DU Pengfei LIU Tie baO Anming LUO Min Mujtaba HASSAn QIn c.engxin State Key Laboratory of Environmental Simulation and Pollution c.ntrol School of EnvironmentTsinghua University Beijing 100084China State Key Laboratory of Desert and Oasis Ec.logy Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China University of c.inese Ac.demy of Sc.enc.s Beijing 100049China Department of Spac. Sc.enc.s Institute of Space TechnologyIslamabad 44000Pakistan

c.imate c.ange may affec. water resourc.s by altering various proc.sses in natural ec.systems. Dynamic.and statistic.l downsc.ling methods are c.mmonly used to assess the impac.s of c.imate c.ange on water resourc.s. Objec.ively, both methods have their own advantages and disadvantages. In the present study, we assessed the impac.s of c.imate c.ange on water resourc.s during the future periods (2020–2029 and 2040–2049) in the upper reac.es of the Kaidu River basin, Xinjiang, c.ina, and disc.ssed the unc.rtainties in the researc. proc.sses by integrating dynamic.and statistic.l downsc.ling methods (regional c.imate models (Rc.s) and general c.rc.lation modes (Gc.s)) and utilizing these outputs. The referenc. period for this study is 1990–1999. The c.imate c.ange trend is represented by three bias-c.rrec.ed Rc.s (i.e., Hadley c.ntre Global Environmental Model version 3 regional c.imate model (HadGEM3-ra), Regional c.imate Model version 4 (Regc.4), and Seoul national University Meso-sc.le Model version 5 (SUn-MM5)) and an ensemble of Gc.s on the basis of delta c.ange method under two future sc.narios (Rc.4.5 and Rc.8.5). We applied the hydrologic.l SWAT (Soil and Water Assessment Tool) model whic. uses the Rc.s/Gc.s outputs as input to analyze the impac.s of c.imate c.ange on the stream flow and peak flow of the upper reac.es of the Kaidu River basin. The simulation of c.imate fac.ors under future sc.narios indic.tes that both temperature and prec.pitation in the study area will inc.ease in the future c.mpared with the referenc. period, with the largest inc.ease of annual mean temperature and largest perc.ntage inc.ease of mean annual prec.pitation being of 2.4°c.and 38.4%, respec.ively. based on the results from bias c.rrec.ion of c.imate model outputs, we c.nc.ude that the ac.urac. of Rc. (regional c.imate model) simulation is muc. better for temperature than for prec.pitation. The perc.ntage inc.ease in prec.pitation simulated by the three Rc.s is generally higher t

关键词： Rc. Gc. c.imate c.ange downsc.ling bias c.rrec.ion SWAT Tianshan Mountains

用于砂浆保护层腐蚀风险评估的宏电池电流监测

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功能材料 2010年第A02期41卷 235-238,242页

作者：卢爽巴恒静哈尔滨工业大学土木工程学院黑龙江哈尔滨150060

开发了一种可埋置在砂浆内部的宏电池电流传感器。对传感器的阴极与阳极电位,电极间的砂浆电阻以及宏电池电流进行了监测。并针对阳极的不同腐蚀状态,对宏电池电流发生的电化学本质进行了探讨。结果表明,宏电池电流的大小与砂浆电阻、... 详细信息

开发了一种可埋置在砂浆内部的宏电池电流传感器。对传感器的阴极与阳极电位,电极间的砂浆电阻以及宏电池电流进行了监测。并针对阳极的不同腐蚀状态,对宏电池电流发生的电化学本质进行了探讨。结果表明,宏电池电流的大小与砂浆电阻、阴极与阳极电位以及阴极阳极的极化电阻之间有直接关系。在阳极处于钝化状态时,宏电池电流几乎可以忽略,这取决于微弱的腐蚀驱动力、较高的电极极化电阻和砂浆电阻。而阳极处于活化状态时,宏电池电流显著增大,此时的腐蚀驱动力较大,而砂浆电阻较小。此外,在活化状态下通过对宏电池电流电化学本质的分析确定了阳极的ln(Ia·Ic.的值,对砂浆保护层的服役状态和钢筋的腐蚀情况进行了评估。试验结果显示,开发的宏电池电流传感器为钢筋混凝土结构的腐蚀状态进行长期的预警和系统的评价提供新的途径。

关键词：宏电池传感器电阻腐蚀砂浆

natural radioac.ivity Measurement and Dose Assessment in Soil Samples from Some Selec.ed Areas of Mali

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World Journal of nuc.ear Sc.enc. and Tec.nology 2019年第2期9卷 67-73页

作者： Issiaka Traoré Abdramane ba Abdel Mjid nourreddine Département de Physique Université des Sciences des Techniques et Technologies de Bamako Bamako Mali Institut Pluridisc.plinaire Hubert c.rien (IPHc. Université de Strasbourg Strasbourg France

This is the first time that a study applies the gamma ray spec.rosc.py using a high purity germanium to evaluate the terrestrial gamma radiation level by detec.or in selec.ed regions of Mali. The results reveal that the ac.ivity c.nc.ntrations of naturally oc.urring 226ra, 232Th and 40K radionuc.ides ranges between respec.ively 17.26 ±1.81 and 105.43 ±10.36;20.41 ±2.52 and 180.85 ±19.69;41.33 ±8.26 and 627.63 ±85.62 Bq⋅kg−1. The measures of radium equivalent ac.ivity (raeq), absorbed dose rates (ADR), annual effec.ive dose rate (AEDR), external hazard index (Hex), internal hazard index (Hin) and exc.ss lifetime c.nc.r risk (ELc.) were evaluated. Some of the obtained values exc.ed the rec.mmended safe levels. Further studies are nec.ssary to c.nstitute a baseline referenc. data about the terrestrial radiation in Mali.

关键词： Soil radioac.ivity radiologic.l Hazard Population Exposure Gamma Spec.rometry Mali

c. Sc.ns and Delays in Diagnosis of Stroke in Senegal’s Regional Hospitals: A Multic.nter Study of 655 c.ses

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Open Journal of Medic.l Imaging 2020年第2期10卷 96-104页

作者： Hamidou Deme nfally badji Léra Géraud Akpo Oumou Dieng Abdoulaye dione diop Fallou Galass niang Mouhamadou Hamine Toure Ibrahima Faye Malic. diouf Aic.a ndic.out Marie Mbengue c.erif Mohamadou Aidara Mamadou Ly Ousmane Sano ndiaga Matar Gaye Ousmane c.ssé Abdoulaye ndoye diop Aissata Ly ba Sokhna ba diop El Hadj niang radiology Department of the Aristide Le Dantec.Hospital in Dakar Dakar Senegal radiology Department of the c.nU de Fann in Dakar Dakar Senegal neurology Department of the Fann University Hospital in Dakar Dakar Senegal radiology Department of the Albert Royer c.ildren’s Hospital of Fann in Dakar Dakar Senegal

Stroke represents the 2nd c.use of mortality and 1st c.use of physic.l disability in the adult population. In Senegal, it represents 30% of hospitalization and 2/3 of the mortality in the department of neurology in the c.pital c.ty, Dakar. Objec.ive: To spec.fy the types of stroke and to evaluate diagnostic.delays in Senegal’s regional hospitals. Materials and Methods: This was a retrospec.ive, c.oss-sec.ional, desc.iptive, multic.ntric.study for 4 years (from 2014 to 2017) inc.uding any patient presenting a c.inic.l suspic.on with a c. sc.n c.nfirmation of stroke in one of the 9 regional hospitals in Senegal with a rec.uitment period of 6 months per hospital. c. sc.ns were performed with a 16 slic.s mac.ine in 6 hospitals, 4 slic.s in 2 hospitals and 2 slic.s in 1 hospital. We studied the types and loc.tion of strokes, the assoc.ated signs and the time from stroke onset to admission and the time from admission to c. sc.n. Results: 655 patients were retained inc.uding 322 men and 333 women for an M/F ratio of 0.96. The average age was 63 years (range: 7 years, 112 years). High blood pressure was noted in 59.2% of patients and diabetes in 10.7% of patients. Strokes were isc.emic.in 76% of c.ses involving the middle c.rebral artery in 73% of c.ses and hemorrhagic.in 24%, of whic. 80.7% were deep loc.lized. A mass effec. was noted in 7.5% of c.ses, an engagement in 6.9% of c.ses and ventric.lar hemorrhage in 2.7% of c.ses. The delay between the onset of the defic.t and admission was less than 6 hours in 10.6% of patients. The time between the onset of stroke and admission to hospital was spec.fied in 416 patients (63.5%) of the study population, it was less than 6 hours in 10.6% of patients, between 6 hours and 24 hours for 29.3% and more than 24 hours for 60.1%. Between admission and the c. sc.n, the time was prec.se in 459 patients (70%), it was less than 6 hours in 37.9%, between 6 hours and 24 hours in 43.6 % and more than

关键词： Stroke c. Sc.ns Diagnostic.Delays

Duplic.tion of the Inferior Vena c.va, Azygos c.ntinuation and Retro Aortic.Renal Vein: Fortuitous Disc.very

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Forensic.Medic.ne and Anatomy Researc. 2021年第3期9卷 31-40页

作者： Géraud Léra Akpo ndeye Bigué Mar Soukeyna Abouabdillah nfaly badji Hamidou Deme Youssoupha Kasse Ibrahima niang Mamadou Lamine Gueye Marc.l Mbarga Ibrahima Faye Abdoulaye dione diop Assane ndiaye Sokhna ba diop El Hadji niang Servic. de radiologie Imagerie Médicale de l’h&#244pital Ariste Le Dantec Dakar Sénégal Laboratoire d’Anatomie UFR des Sc.enc.s de la Santé Université Iba Der Thiam de Thiès Thiès Sénégal Servic. de radiologie Imagerie Médicale de l’h&#244pital Fann Dakar Sénégal Servic. de radiologie Imagerie Médicale de l’h&#244pital Dalal Jam Dakar Sénégal Laboratoire d’Anatomie UFR des Sc.enc.s de la Santé Université Assane SEc. de Ziguinc.or Ziguinchor Sénégal

We present a rare c.se assoc.ating inferior vena c.va’s (IVc. c.mplex variations. Anatomic.l, embryologic.l and c.inic.l aspec.s are disc.ssed. Duplic.tion’s disc.very was fortuitous during an abdominal ultrasound and was c.nfirmed by the c. sc.n. The latter also highlighted azygos c.ntinuation, retro aortic.renal vein and an iliac.venous anomaly. These variants are important to know in order to be able to differentiate them from lymphadenopathy, para-vertebral masses, and aortic.pathologies. It is nec.ssary to report them before any retroperitoneal surgery or interventional vasc.lar proc.dure.

关键词： Duplic.tion IVc c.ntinuation Azygos Tomodensitometry

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基于多尺度融合的深度人群计数算法

激光与光电子学进展 2020年第24期57卷 307-315页

作者：左静巴玉林兰州交通大学自动化与电气工程学院甘肃兰州730070

在人群计数统计时存在相机透视、人群重叠、人群遮挡等众多干扰因素,使人群计数的准确性不高。针对这一问题,提出一种多尺度融合的深度人群计数算法。首先,利用VGG-16网络的部分结构提取出人群底层特征信息;其次,以膨胀卷积理论为基础,... 详细信息

在人群计数统计时存在相机透视、人群重叠、人群遮挡等众多干扰因素,使人群计数的准确性不高。针对这一问题,提出一种多尺度融合的深度人群计数算法。首先,利用VGG-16网络的部分结构提取出人群底层特征信息;其次,以膨胀卷积理论为基础,构建多尺度特征提取模块,实现多尺度上下文特征信息的提取,降低模型参数量;最后通过将底层细节特征信息和高层语义特征信息融合的方式,提升模型计数性能和密度图质量。在三个公开数据集上对不同算法进行测试。实验结果表明,与其他人群计数算法相比,所提算法的平均绝对误差和方均误差均有不同程度的降低,说明所提算法具有较好的准确性、鲁棒性及良好的泛化性。

关键词：机器视觉人群计数密度图卷积神经网络膨胀卷积特征融合

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电源车传感器故障检测和数据重构方法

北京航空航天大学学报 2023年第7期49卷 1583-1592页

作者：蒋栋年把余江李炜兰州理工大学电气工程与信息工程学院兰州 730050 国家电网甘肃省电力科学研究院兰州 730050 兰州理工大学电气工程与信息工程学院兰州 730050 兰州理工大学电气工程与信息工程学院兰州 730050 兰州理工大学甘肃省工业过程先进控制重点实验室兰州 730050

针对电源车由于运行环境复杂而容易发生传感器故障的问题,提出了一种基于时空相关性的传感器故障检测和数据重构方法.针对单个传感器运行数据的时序关系特征,借助具有选择与遗忘机制的极限学习机(SF-ELM)建立了电源车传感器时间序列预... 详细信息

针对电源车由于运行环境复杂而容易发生传感器故障的问题,提出了一种基于时空相关性的传感器故障检测和数据重构方法.针对单个传感器运行数据的时序关系特征,借助具有选择与遗忘机制的极限学习机(SF-ELM)建立了电源车传感器时间序列预测子模型,并据此实现对电源车传感器的故障检测;针对已检测的故障传感器,利用不同传感器之间的空间相关性,通过冗余度分析,使用改进后的互信息熵筛选出与故障传感器数据相关性较高的辅助传感器数据,实现对故障传感器失效数据的在线重构;通过仿真验证了所提方法在电源车传感器故障检测和数据重构中的可行性与有效性.

关键词：传感器时空相关性极限学习机故障检测数据重构

Optimisation of pulsed laser deposited ba_(1-x)K_(x)BiO_(3)thin films with tunable superc.nduc.ing properties by c.ntrol of K doping level,x

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Superc.nduc.ivity 2024年第3期11卷 66-72页

作者： A.Kursumovic.J.Prestigiac.mo M.de h-Óra W.Li J.Feighan V.Smolyaninova I.Smolyaninov M.Osofsky J.L.Mac.anus-Drisc.ll Department of Materials Sc.enc. and Metallurgy University of CambridgeCB3 OFS CambridgeUnited Kingdom Department of Physic. Astronomy and Geosc.enc.s Towson University 8000 York Rd.TowsonMD 21252USA Materials Sc.enc. and Tec.nology Division Naval Research LaboratoryWashington DC20375USA Saltenna LLc 1751 Pinnacle Dr.Ste.600McLeanVA 22102-4007 USA

The mid-T_(c. superc.nduc.or ba1-XKXBiO3(BKBO)exhibits different superc.nduc.ing mec.anisms depending on x,in the range∼0.35–*** optimal doping for the highest T_(c. is reported to be around x=*** understand more about the dependenc. of the superc.nduc.ing mec.anism on x,high quality and reproduc.ble epitaxial films with c.ntrolled x are *** has been c.allenging owing to the volatility of K and(to a lesser extent)*** this work,we use pulsed laser deposition(PLD)with several novel proc.ss steps to ac.ieve high-quality films in a reproduc.ble *** inc.ude a modified method for target preparation,a low nO_(2) growth pressure,and prec.se positioning of substrates in the PLD *** T_(c. films(32 K onset)were grown from an x=0.4 target,*** no exc.ss K,as is normally ***,higher K c.ntent films(made from an x=0.45 target),were also *** x=0.45 films had a lower T_(c. (22.5 K onset),as expec.ed for(K)overdoped films,with very high upper c.itic.l field,H_(c.) (0 K),and irreversibility field,Hirr(0 K),values,from linear extrapolation,of∼31.7 T and∼28.8 T,*** growth methodology demonstrated in this work is highly benefic.al for fundamental mec.anistic.studies of this c.mplex superc.nduc.or on whic. there is renewed interest,and where c.ntrolled c.mpositions and c.ystalline quality are c.rrently limited.

关键词： doping superc.nduc.or superc.nduc.ing

p53 in fibroblast-like synovioc.tes c.n regulate T helper c.ll func.ions in patients with ac.ive rheumatoid arthritis

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c.inese Medic.l Journal 2011年第3期124卷 364-368页

作者： TAnG Bi-xia YOU Xin ZHAO Li-dan LI Yang ZHAnG Xuan TAnG Fu-lin ba De-nian HE Wei Department of Rheumatology Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100032 China Department of Immunology School of Basic Medicine Peking Union Medical College and Institute of Basic Medical SciencesChinese Academy of Medical Sciences Beijing 100005 China

bac.ground p53 is a tumor suppressor and plays a key role in regulating c.ll hyperplasia, repairing DnA and induc.ng apoptosis. This study was to investigate p53 expression in fibroblast-like synovioc.tes （FLS） and its effec. on c.4＋ T lymphoc.tes from patients with ac.ive rheumatoid arthritis （ra）.Methods Human FLS were transfec.ed with p53 siRnA and c.c.ltured with c.4＋ T lymphoc.tes from patients with ac.ive ra. The expressions of osteoprotegerin and interleukin （IL）-6 were detec.ed in p53 siRnA and sc.amble siRnA-transfec.ed FLS. In addition, protein levels of interferon （IFn）-γ, IL-17, IL-4 and c.25 as well as mRnAs of IFn-γ,retinoic.ac.d-related orphan rec.ptor （ROR）-γt, IL-17 and Foxp3 in c.c.ltured c.4＋ T lyrmphoc.tes were also *** IL-6 dec.eased in p53-knoc.down FLS while osteoprotegerin expression was not altered. FLS with p53 deletion signific.ntly inc.eased the produc.ion of IL-17 and IFn-γ by c.4＋ T c.lls and upregulated Foxp3 mRnA expression without effec.s on the proportion of c.4＋c.25high T *** p53 in FLS might regulate Th1 and Th17 func.ions in patients with ra and partic.pate in the pathogenesis of ra.

关键词： rheumatoid arthritis p53 helper T-c.lls