检索结果-南通市图书馆

Im.act of tropospheric m.delling on GNSS vertical precision:an em.irical analysis based on a local active network

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2018年第9期11卷 880-896页

作者： m.Selm.ra Garrido m.Clara de lacy Ana m.Rojas Departm.nt of Cartographic Geodetic and Photogrammetric EngineeringUniversity of JaénJaenSpain Center for Advanced Studies in Earth Sciences University of JaénJaenSpain Research group RNm.82–m.crogeodesia Jaén University of JaénJaenSpain

The troposphere affects Global Navigation Satellite System.GNSS)signals due to the variability of the refractive *** delay is a function of the satellite elevation angle and the altitude of the GNSS receiver and depends on the atm.spheric *** the residual tropospheric delay is not m.delled carefully a bias error will occur in the vertical *** order to analyse the precise altim.tric positioning based on a local active network,four scenarios in Southern Spain with different topographical,environm.ntal,and m.teorological conditions are presented,considering both favourable and non-favourable *** use of surface m.teorological observations allows us to take into account the tropospheric conditions instead of a standard atm.sphere,but introduces a residual tropospheric bias which reduces the accuracy of precise GNSS ***,with short observation tim.s it is recom.ended not to estim.te troposphere param.ters,but to use an a priori m.del together with the standard *** results confirm.that it is possible to achieve centim.tre-scale vertical accuracy and precision with real tim. kinem.tic positioning even with large elevation differences with respect to the nearest reference *** num.rical results m.y be taken into consideration for im.roving the altim.tric configuration of the local active network.

关键词： Altim.try GNSS m.teorological data active network tropospheric refraction

Evolution of transanal total m.sorectal excision for rectal cancer:From.top to bottom

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2018年第3期10卷 28-39页

作者： Sam.h Hany Em.le F Borja de lacy Deborah Susan Keller Beatriz m.rtin-Perez Sadir Alrawi Antonio m.lacy m.nish Chand Departm.nt of General Surgery Mansoura Faculty of Medicine Departm.nt of Surgery Hospital Clinic University of Barcelona GENIE Centre University College London Departm.nt of Surgery and Interventional Sciences University College London Hospitals NHS Trusts Departm.nt of Surgical Oncology Alzahra Cancer Center Al Zahra Hospital

The gold standard for curative treatm.nt of locally advanced rectal cancer involves radical resection with a total m.sorectal excision(Tm.). Tm. is the m.st effective treatm.nt strategy to reduce local recurrence and im.rove survival outcom.s regardless of the surgical platform.used. However, there are associated m.rbidities, functional consequences, and quality of life(QoL) issues associated with Tm.; these risks m.st be considered during the m.dern-day m.ltidisciplinary treatm.nt for rectal cancer. This has led to the developm.nt of new surgical techniques to im.rove patient, oncologic, and QoL outcom.s. In this work, we review the evolution of Tm. to the transanal total m.sorectal excision(TaTm.) through m.re traditional m.nim.lly invasive platform.. The review the developm.nt, safety and feasibility, proposed benefits and risks of the procedure, im.lem.ntation and education m.dels, and future direction for research and im.lem.ntation of the TaTm. in colorectal surgery. While satisfactory short-term.results have been reported, the procedure is in its infancy, and long term.outcom.s and definitive results from.controlled trials are *** evidence for safety and feasibility accum.lates,structured training program. to standardize teaching,training, and safe expansion will aid the safe spread of the TaTm..

关键词： Rectal cancer Total m.sorectal excision Transanal total m.sorectal excision Transanal total m.sorectal excision Sphincter sparing surgery Colorectal surgery

Controlled growth of a single carbon nanotube on an AFm.probe

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.crosystem. & Nanoengineering 2021年第5期7卷 97-103页

作者： Biyao Cheng Shum.ng Yang Wei Li Shi Li shareen Shafique Dong Wu Shengyun Ji Yu Sun Zhuangde Jiang State Key Laboratory for m.nufacturing System. Engineering Xi'an Jiaotong UniversityXi'an 710049China National Institute of m.trology Beijing 102200China Departm.nt of Precision m.chinery and Precision Instrum.ntation University of Science and Technology of ChinaAnhui 230027China Departm.nt of m.chanical and Industrial Engineering University of TorontoTorontoOntario M5S 3G8Canada

Carbon nanotubes(CNTs)can be used as atom.c force m.croscopy(AFm.tips for high-resolution scanning due to their sm.ll diam.ter,high aspect ratio and outstanding wear ***,previous approaches for fabricating CNT probes are com.lex and poorly *** this paper,we introduce a sim.le m.thod to selectively fabricate a single CNT on an AFm.tip by controlling the trigger threshold to adjust the am.unt of growth solution attached to the *** yield rate is over 93%.The resulting CNT probes are suitable in length,without the need for a subsequent cutting *** used the CNT probe to scan the com.lex nanostructure with a high aspect ratio,thereby solving the long-lasting problem.of m.pping com.lex nanostructures.

关键词： thereby attached carbon

Optim.l diet strategy of a large-bodied psittacine: food resource abundance and nutritional content enable facultative dietary specialization by the m.litary m.caw

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Avian Research 2019年第4期10卷 469-477页

作者： Sylvia m.rgarita de la Parra‑m.rtinez Luis Guillerm. m.noz‑lacy Alejandro Salinas‑m.lgoza Katherine Renton Departam.nto de Ciencias Biologicas Centro Universitario de la CostaUniversidad de GuadalajaraAv.Universidad No.203Delegacion IxtapaC.P.48280 Puerto VallartaJaliscoMexico Com.sion Nacional Para el Conocim.ento y Uso para la Biodiversidad Liga Periferico‑Insurgentes Sur 4903Delegacion Tlalpan14010 Mexico CityMexico Facultad de Biologia Universidad Michoacana de San Nicolas de HidalgoCiudad UniversitariaMoreliaMichoacanMexico Estacion de Biologia Cham.la Instituto de BiologiaUniversidad Nacional Autonoma de MexicoApartado Postal 21San Patricio‑MelaqueJaliscoMexico

Background:Dietary specialization should arise when there is a relatively high abundance of a particular resource,where anim.ls m.y select food item. to obtain an optim.l diet that m.xim.zes energy ***‑bodied psittacines frequently exhibit a narrow dietary niche with specific habitat use,but few studies have determ.ned whether psittacines select food resources,and how this influences habitat ***:We established fruiting phenology transects to evaluate food resource availability for the large‑bodied m.litary m.caw(Ara m.litaris)in sem.‑deciduous,deciduous,and pine‑oak forest at two sites along the coast of Jalisco,during the dry season when m.caws are *** also determ.ned m.litary m.caw diet by observations of foraging m.caws along transect routes,and conducted brom.tological analysis of the nutritional content of the m.st consum.d ***:m.litary m.caws used six plant species as food item. during the dry season,and had a narrow dietary niche(Levins’B=0.28),with 56%of foraging m.caws consum.ng the seeds of Hura *** food resources were recorded in pine‑oak forest during the dry season,with food resources and foraging by m.caws concentrated in tropical deciduous and sem.‑deciduous forest,where *** was the m.st abundant fruiting tree *** considering the proportional availability of food resources,we determ.ned a broad Hurlbert dietary niche breadth of H=0.67,indicating that m.litary m.caws consum.d food resources according to their ***,the seeds of *** were an im.ortant source of protein,carbohydrates,m.nerals and m.isture,and the hard fruitcasing m.ans that these seeds are exclusively available for ***:By concentrating their diet on the m.st abundant resources,m.litary m.caws m.y increase foraging efficiency in the dry *** high nutrient content also m.ans that concentrating the diet on seeds of *** m.y be an optim.l foraging strategy for m.litary m.caws

关键词： Ara m.litaris Brom.tological analysis Diet com.osition Food resource selection Fruiting phenology Hura polyandra Psittacidae Tropical dry forest

在线全文

学校读者我要写书评

暂无评论

风冷作用对鸡的影响

国外畜牧学（猪与禽） 1997年第2期17卷 23-25页

作者： m.Czarick m.P.lacy 葛新昌美国佐治亚大学合作推广服务站

食管测压和pH监测:胃肠病专家所坚持的公开准则

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2006年第1期2卷 44-45页

作者： Ali m.A. lacy B.E. 郑世成 Division of Gastroenterology and Hepatology Dartmouth-Hitchcock-Medical Center 1 Medical Center Drive Lebanon NH 03756 United States Dr.

Goals: To determ.ne whether gastroenterologists use esophageal m.nom.try (Em. and esophageal pH recording (pHR) in accordance with published guidelines. Study: Questionnaires were m.iled to 900 random.y selected gastroenterologists nationwide. Each questionnaire requested dem.graphic inform.tion and contained 11 case scenario-based questions, followed by a choice of m.nagem.nt options. Results: A total of 275 com.leted questionnaires (30.6% )were returned. 63.6% and 64.4% of respondents were aware of published guidelines regarding the use of Em.and pHR, respectively. The m.jority of respondents ordered Em.appropriately: 1) to confirm.a suspected diagnosis of achalasia (97.1% ); 2) to establish a diagnosis of connective tissue disease (89.7% ); 3) as part of the preoperative evaluation for anti-reflux surgery (74.6% ); and 4) to ensure the proper placem.nt of pH probes (69.4% ). Em.was rarely ordered for the initial workup of noncardiac chest pain. The m.jority of responding gastroenterologists would order pHR for the evaluation of: 1) endoscopy-negative patients being considered for anti-reflux surgery (79.1% ); 2) patients with recurrent GERD sym.tom. after anti-reflux surgery (62.5% ); 3) endoscopy-negative patients with GERD sym.tom. refractory to proton pum. inhibitor (PPI) therapy; and 4) patients with extraesophageal m.nifestations of GERD that are refractory to PPI therapy (88.7% ). Conclusions: The m.jority of gastroenterologists in our study order Em.and pHR in accordance with published guidelines. However, Em.appears to be used less than expected for preoperative evaluation before anti-reflux surgery and for ensuring the proper placem.nt of pH probes. In addition, the use of pHR to evaluate persistent GERD sym.tom. after anti-reflux surgery was less than anticipated.

关键词：食管测压 pH监测胃肠病失弛缓症抗反流手术内镜检查结缔组织病胸痛应用情景阴性患者

Point-of-Care Testing vs. Laboratory Testing during High Patient Volum. Situations

在线全文

学校读者我要写书评

暂无评论

Open Journal of Em.rgency m.dicine 2019年第4期7卷 49-56页

作者： Jonathan m.Coy Robert Eisenstein Channing Hui Greg Corcoran Chris Kilker Pam.la Ohm.n-Strickland m.rk m.rlin Clifton lacy Rutgers-Robert Wood Johnson m.dical School Department of Emergency Medicine (RWJMS) New Brunswick NJ USA Alpert m.dical School of Brown University Department of Medicine Division of Pulmonary Critical Care and Sleep Medicine Providence RI USA Capital Health Em.rgency Departm.nt Trenton NJ USA Rutgers-School of Public Health (SPH) Piscataway NJ USA Newark Beth Israel m.dical Center Department of Emergency Medicine Newark NJ USA Rutgers-Robert Wood Johnson m.dical School Rutgers School of Communication and Information New Brunswick NJ USA

Introduction: Our aim.was to determ.ne what patient volum., if any, in-laboratory testing provides results faster than Point-of-Care-Testing (POCT). m.thods: To evaluate POCT effectiveness during high volum. situations, POCT was com.ared to in-laboratory testing during busy periods with large num.ers of patients. Our setting was an urban level 1 traum. center with an academ.c em.rgency m.dicine departm.nt (ED) and annual patient volum. of 70,000. Patients seen requiring laboratory testing during peak volum. between 11 a.m. and 7 p.m. were enrolled over a five-week period. One tube of blood was sent to the laboratory and the other tube was run in the ED using POCT. Turnaround tim. was recorded as tim. from.when the tube was received to when the result was available. We also com.leted a tim.-m.tion study to assess the num.er of POCT m.chines that would be needed to process the entire average hourly hospital laboratory volum.. Results: We collected 539 hem.tology and chem.stry specim.ns. The POCT group was significantly faster than in-laboratory testing, with m.an POCT [com.lete blood count (CBC) and chem.stry] 3.5 m.nutes com.ared to in-laboratory CBC test tim. of 30.9 m.nutes and chem.stry test tim. of 55 m.nutes. As the volum. of sam.les peaked, there was a slight but insignificant decrease in POCT turnaround tim.. If POCT was used to process the entire average hospital laboratory volum. which approached 54 sam.les an hour, 3 POCT m.chines would be necessary to m.intain turnaround tim.s. Conclusion: Even during ED high volum. situations, POCT provided results significantly faster than in-laboratory testing.

关键词： Point-of-Care Testing Em.rgency Departm.nt Disaster m.dicine

经肛全直肠系膜切除术与前入路(经腹)全直肠系膜切除术治疗直肠癌:一项在西班牙加泰罗尼亚地区进行的基于人群的倾向性评分匹配研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

结直肠肛门外科 2021年第6期27卷 610-612页

作者：卓长华池畔 m.NCHON-WALSH P DE lacy F B PERA m 福建省肿瘤医院胃肠肿瘤外科福建福州350014 福建医科大学附属协和医院普通外科(结直肠外科) 福建福州350001 不详

背景:经肛全直肠系膜切除术的临床应用价值尚存在争议。目的:比较经肛与前入路(经腹)全直肠系膜切除术治疗直肠癌的短期和中期效果。设计:这是一项多中心的回顾性队列研究。设置:该研究包括加泰罗尼亚地区所有的公立医院。患者:2015—2... 详细信息

背景:经肛全直肠系膜切除术的临床应用价值尚存在争议。目的:比较经肛与前入路(经腹)全直肠系膜切除术治疗直肠癌的短期和中期效果。设计:这是一项多中心的回顾性队列研究。设置:该研究包括加泰罗尼亚地区所有的公立医院。患者:2015—2016年接受经肛或前入路全直肠系膜切除术(开腹或腹腔镜)治疗的所有原发性非转移性直肠癌患者。主要结局指标:生存状态数据收集至2019年3月。

关键词：全直肠系膜切除术前入路回顾性队列研究中期效果结局指标公立医院直肠癌患者数据收集

与肠功能失调相关的肛门失禁亚型:临床、生理及社会心理方面的特征

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2005年第4期1卷 19-20页

作者： Crowell m.D. lacy B.E. Schettler V.A. 樊菁 Gastrointest. Physiol. and m.tility Div. of Gastroenterol. and Hepatol. Mayo Clinic Scottsdale 13400 E. Shea Blvd. Scottsdale AZ 85259 United StatesDr.

BACKGROUND: We hypothesized that functional anal incontinence with no structur al explanation com.rises distinct pathophysiologic subgroups that could be ident ified on the basis of the predom.nant presenting bowel pattern. m.THODS: Consecu tive patients (n = 80) were prospectively grouped by bowel sym.tom. as 1) incont inence only, 2) incontinence +constipation, 3) incontinence +diarrhea, and 4) incontinence +alternating bowel sym.tom.. The Hopkins Bowel Sym.tom.Questionnai re, the Sym.tom.Checklist 90-R, and anorectal m.nom.try were com.leted. RESULTS : Significant group differences were found between subcategories of incontinent patients on the basis of sym.tom.. Abdom.nal pain was m.re frequent in patients with altered bowel patterns. Patients with alternating sym.tom. reported the hig hest prevalence of abdom.nal pain, rectal pain, and bloating. Basal anal pressur es were significantly higher in alternating patients (P = 0.03). Contractile pre ssures in the distal anal canal were dim.nished in the incontinent only and dia rrhea groups (P = 0.004). Constipated patients with incontinence exhibited eleva ted thresholds for the urge to defecate (P = 0.027). Dyssynergia was significant ly m.re frequent in patients with incontinence and constipation or alternating b owel patterns. CONCLUSIONS: Distinct patterns of pelvic floor dysfunction were i dentified in patient subgroups with anal incontinence, based on the presence or absence of altered bowel patterns. Physiologic assessm.nts suggested different p athophysiologic m.chanism. am.ng the subgroups. The evaluation of patients with fecal incontinence should consider altered bowel function.

关键词：肛门失禁功能失调肠道症状社会心理肛门直肠测压交替性便时盆底功能直肠痛腹胀症状