维普中文期刊产品整合服务
6941篇 您的检索式:作者名="Balling"
    题名 作者 年代 出处 被引量
1基于电动机电流信号双谱分析的齿轮传动故障诊断显示文摘电动机电流信号分析广泛应用于电动机本身的监测,但用该项技术监测与电动机相连设备的研究却很少。提出应用异步电动机的电流信号的调制信号双谱分析方法,实现对与电动机连接的齿轮传动系统的故障监测。试验表明调制信号双谱波峰的升高可以作为检测故障的依据。齿轮的故障可通过观测相关轴的双频波峰的变化进行诊断,与齿轮直接相连的轴产生较大的波峰增高,而与齿轮相邻的轴产生较小的波峰增高但轴不对中的故障可以只观测与该轴相应的双频波峰增高来确定。陈峙 王铁 谷丰收 MANSAF Haram ANDREW Ball 2012机械工程学报2012,48,21:35
2揭示中国5000年前酿造谷芽酒的配方显示文摘通过对西安米家崖遗址陶器上淀粉粒、植硅体、以及化学残留物的综合分析,本研究揭示了迄今为止中国最早的酿造谷芽酒的直接证据。结果显示,米家崖酿酒的原料包括黍、大麦、薏米、以及一些块根作物,说明在距今约5000年的仰韶文化晚期,中原地区已经发展出了较为成熟的谷芽酒酿造技术。同时,这项研究也对大麦传入中国初期的功能提出一种全新的见解。我们认为,酿酒可能是最初促使大麦从欧亚大陆西部传入中原的动因。王佳静 刘莉 Terry Ball 俞霖洁 李元青 邢福来 2017考古与文物2017,,6:21
3Upper-gastrointestinal bleeding secondary to peptic ulcer disease:Incidence and outcomes显示文摘AIM:To evaluate the incidence,surgery,mortality,and readmission of upper gastrointestinal bleeding(UGIB)secondary to peptic ulcer disease(PUD).METHODS:Administrative databases identified all hospitalizations for UGIB secondary to PUD in Alberta,Canada from 2004 to 2010(n=7079)using the International Classification of Diseases Codes(ICD-10).A subset of the data was validated using endoscopy reports.Positive predictive value and sensitivity with 95%confidence intervals(CI)were calculated.Incidence of UGIB secondary to PUD was calculated.Logistic regression was used to evaluate surgery,in-hospital mortality,and 30-d readmission to hospital with recurrent UGIB secondary to PUD.Co-variants accounted for in our logistic regression model included:age,sex,area of residence(i.e.,urban vs rural),number of Charlson comorbidities,presence of perforated PUD,undergoing upper endoscopy,year of admission,and interventional radiological attempt at controlling bleeding.A subgroup analysis(n=6356)compared outcomes of patients with gastric ulcers to those with duodenal ulcers.Adjusted estimates are presented as odds ratios(OR)with95%CI.RESULTS:The positive predictive value and sensitivity of ICD-10 coding for UGIB secondary to PUD were85.2%(95%CI:80.2%-90.2%)and 77.1%(95%CI:69.1%-85.2%),respectively.The annual incidence between 2004 and 2010 ranged from 35.4 to 41.2 per100000.Overall risk of surgery,in-hospital mortality,and 30-d readmission to hospital for UGIB secondary to PUD were 4.3%,8.5%,and 4.7%,respectively.Interventional radiology to control bleeding was performed in 0.6%of patients and 76%of these patients avoided surgical intervention.Thirty-day readmission significantly increased from 3.1%in 2004 to 5.2%in 2010(OR=1.07;95%CI:1.01-1.14).Rural residents(OR rural vs urban:2.35;95%CI:1.83-3.01)and older individuals(OR≥65 vs<65:1.57;95%CI:1.21-2.04)were at higher odds of being readmitted to hospital.Patients with duodenal ulcers had higher odds of dying(OR=1.27;95%CI:1.05-1.53),requiring surgery(OR=1.73;95%CI:1.34-2.23),and being readmitted to hospital(OR=1.54;95%CI:1.19-1.99)when compared to gastric ulcers.CONCLUSION:UGIB secondary to PUD,particularly duodenal ulcers,was associated with significant morbidity and mortality.Early readmissions increased over time and occurred more commonly in rural areas.Samuel Quan Alexandra Frolkis Kaylee Milne Natalie Molodecky Hong Yang Elijah Dixon Chad G Ball Robert P Myers Subrata Ghosh Robert Hilsden Sander Veldhuyzen van Zanten Gilaad G Kaplan 2014World Journal of Gastroenterology2014,20,46:21
4Combining computer vision and deep learning to enable ultra-scale aerial phenotyping and precision agriculture:A case study of lettuce production显示文摘Aerial imagery is regularly used by crop researchers,growers and farmers to monitor crops during the growing season.To extract meaningful information from large-scale aerial images collected from the field,high-throughput phenotypic analysis solutions are required,which not only produce high-quality measures of key crop traits,but also support professionals to make prompt and reliable crop management decisions.Here,we report AirSurf,an automated and open-source analytic platform that combines modern computer vision,up-to-date machine learning,and modular software engineering in order to measure yield-related phenotypes from ultra-large aerial imagery.To quantify millions of in-field lettuces acquired by fixed-wing light aircrafts equipped with normalised difference vegetation index(NDVI)sensors,we customised AirSurf by combining computer vision algorithms and a deep-learning classifier trained with over 100,000 labelled lettuce signals.The tailored platform,AirSurf-Lettuce,is capable of scoring and categorising iceberg lettuces with high accuracy(>98%).Furthermore,novel analysis functions have been developed to map lettuce size distribution across the field,based on which associated global positioning system(GPS)tagged harvest regions have been identified to enable growers and farmers to conduct precision agricultural practises in order to improve the actual yield as well as crop marketability before the harvest.Alan Bauer Aaron George Bostrom Joshua Ball Christopher Applegate Tao Cheng Stephen Laycock Sergio Moreno Rojas Jacob Kirwan Ji Zhou 2019Horticulture Research2019,6,1:14
5人群分类与车内噪声声品质主观评价研究(英文)显示文摘本文以等响处理后的车内噪声为研究对象,进行噪声声品质的主观评价研究。研究发现,人群分类处理对于揭示噪声声品质的主观感知属性起着重要的作用。对于评价者分类处理之后,两类评价者对于车内噪声的偏好性均可采用一个维度表示,并可直接采用成对比较法的直接排序法获得;一类评价者的偏好性与低沉度成正比,而另一类评价者与低沉度成反比。如果未进行人群分类处理,则不能很好地解释其主观感知属性。焦风雷 田静 刘克 毛东兴 GU Feng-shou Andrew BALL 蒋剑 2006声学技术2006,25,6:11
6Tribological behaviour diagnostic and fault detection of mechanical seals based on acoustic emission measurements显示文摘Acoustic emission(AE) has been studied for monitoring the condition of mechanical seals by many researchers, however to the best knowledge of the authors, typical fault cases and their effects on tribological behaviour of mechanical seals have not yet been successfully investigated. In this paper, AE signatures from common faults of mechanical seals are studied in association with tribological behaviour of sealing gap to develop more reliable condition monitoring approaches. A purpose-built test rig was employed for recording AE signals from the mechanical seals under healthy and faulty conditions. The collected data was then processed using time domain and frequency domain analysis methods. The study has shown that AE signal parameters: root mean squared(RMS) along with AE spectrum, allows fault conditions including dry running, spring out and defective seal faces to be diagnosed under a wide range of operating conditions. However, when mechanical seals operate around their transition point, conventional signal processing methods may not allow a clear separation of the fault conditions from the healthy baseline. Therefore an auto-regressive(AR) model has been developed on recorded AE signals to classify different fault conditions of mechanical seals and satisfactory results have been perceived.Hossein TOWSYFYAN Fengshou GU Andrew D BALL Bo LIANG 2019Friction2019,7,6:10
7Duloxetine versus placebo in the treatment of patients with generalized anxiety disorder in China显示文摘背景 Duloxetine 在试图估计功效的美国和 elsewhere.This 学习为概括焦虑混乱(荡者)的治疗被同意, tolerability ,并且在有 GAD.Methods 的中国病人的 duloxetine 的安全这9地点研究与至少中等严重的荡者和 Sheehan 残疾规模( SDS )与 duloxetine 60-120 mg 或与 placebo.Patients 由双窗帘治疗组成了 15 个星期全球工作缺陷总数分数 12 在这研究被包括。在那个点,为 nonresponders ,剂量为留下被增加到 120 mg 主要功效措施是的 8 weeks.The 医院焦虑和消沉规模焦虑 subscale 分数上的端点的从基线的吝啬的变化( HADS --一) .Secondary 功效措施包括了哈密尔顿焦虑等级规模( HAMA ), SDS ,和疼痛 measures.Safety 和 tolerability 是 assessed.Results 基线特征没在这些题目( n=210 )的治疗 groups.Mean 年龄之间显著地不同是 37.6WU Wen-yuan WANG Gang Susan G Ball Durisala Desaiah ANG Qiu-qing 2011Chinese Medical Journal2011,,20:8
8A New Method for Modelling and Simulation of the Dynamic Behaviour of the Wheel-rail contact显示文摘This paper presents a new method for modelling and simulation of the dynamic behaviour of the wheel-rail contact. The proposed dynamic wheel-rail contact model comprises wheel-rail contact geometry, normal contact problem, tangential contact problem and wheelset dynamic behaviour on the track. This two-degree of freedom model takes into account the lateral displacement of the wheelset and the yaw angle. Single wheel tread rail contact is considered for all simulations and Kalker s linear theory and heuristic non-linear creep models are employed. The second order differential equations are reduced to first order and the forward velocity of the wheelset is increased until the wheelset critical velocity is reached. This approach does not require solving mathematical equations in order to estimate the critical velocity of the dynamic wheel-rail contact model. The mathematical model is implemented in Matlab using numerical differentiation method. The simulated results compare well with the estimated results based on classical theory related to the dynamic behaviour of rail-wheel contact so the model is validated.Arthur Anyakwo Crinela Pislaru Andrew Ball 2012International Journal of Automation and computing2012,9,3:7
9Earnings quality in UK private firms: comparative loss recognition timeliness显示文摘Ray Ball Lakshmanan Shivakumar 2004Journal of Accounting and Economics2004,,1:7
10中澳管理者人格类型的性别差异研究显示文摘采用MBTI对中国和澳大利亚管理者人格类型的性别差异进行了比较研究。结果表明,在人格的维度、维度组合、类型上,澳大利亚管理者比中国管理者有更大的性别差异;而两国男性管理者在人格的维度、维度组合、类型上的差异比两国女性管理者的差异更大。研究同时发现,中国男、女管理者人格类型的分布都较集中,澳大利亚男、女管理者的人格类型分布都较均衡。杨慧芳 赵曙明 Ian L. Ball 2009心理科学2009,32,4:5
11The effect of international institutional factors on properties of accounting earnings显示文摘Ray Ball S.P Kothari Ashok Robin 2000Journal of Accounting and Economics2000,,1:5
12澳大利亚初产妇产后的膳食摄入和身体活动习惯与临床建议的关系显示文摘孕期和产后获得理想的膳食和身体活动行为对健康益处良多。了解预测这些行为的因素是一项重要的公共卫生考虑,然而有关产后妇女的饮食和身体活动行为与临床建议的关系所知甚少。澳大利亚迪肯大学开展了一项研究,旨在比较孕期和产后临床提供的膳食频率和身体活动建议,并评估该建议是否与产后膳食和身体活动行为相关。选取参加墨尔本婴儿喂养行为和营养试验项目(InFANT Extend)中完成了澳大利亚癌症委员会食物频率问卷的448个初产妇作为研究对象,产后3~4个月时评估其日常的水果和蔬菜的摄入量(份/天)。van der Pligt P Olander EK Ball K 段一凡 杨振宇 2016中华预防医学杂志2016,50,12:3
13Incentives versus standards: properties of accounting income in four East Asian countries显示文摘Ray Ball Ashok Robin Joanna Shuang Wu 2003Journal of Accounting and Economics2003,,1:3
14Diagnosis and management of postural orthostatic tachycardia syndrome:A brief review显示文摘自从至少 1940,姿势的 orthostatic 心悸亢进症候群(壶) 被认出了。文学的评论在处理和结果为这个条件和宽变化在定义识别差别。这症候群看起来与不同 pathophysiology 描述一组条件,它要求定制到真位于 \O 下面混乱的处理。病人们需要充分被评估指导治疗。进一步的研究被要求有效地分类能生产这症候群的内在的 pathophysiology 的范围并且指导最佳的管理。Howraa Abed Patrick A Ball Le-Xin Wang 2012Journal of Geriatric Cardiology2012,9,1:3
15Ten golden rules for individualized mechanical ventilation in acute respiratory distress syndrome显示文摘Considerable progress has been made over the last decades in the management of acute respiratory distress syndrome(ARDS).Mechanical ventilation(MV)remains the cornerstone of supportive therapy for ARDS.Lung-protective MV minimizes the risk of ventilator-induced lung injury(VILI)and improves survival.Several parame-ters contribute to the risk of VILI and require careful setting including tidal volume(V_(T)),plateau pressure(P_(plat)),driving pressure(ΔP),positive end-expiratory pressure(PEEP),and respiratory rate.Measurement of energy and mechanical power allows quantification of the relative contributions of various parameters(V_(T),P_(plat),ΔP,PEEP,respiratory rate,and airflow)for the individualization of MV settings.The use of neuromuscular blocking agents mainly in cases of severe ARDS can improve oxygenation and reduce asynchrony,although they are not known to confer a survival benefit.Rescue respiratory therapies such as prone positioning,inhaled nitric oxide,and extracorporeal support techniques may be adopted in specific situations.Furthermore,respiratory weaning protocols should also be considered.Based on a review of recent clinical trials,we present 10 golden rules for individualized MV in ARDS management.Denise Battaglini Marco Sottano Lorenzo Ball Chiara Robba Patricia R.M.Rocco Paolo Pelosi 2021Journal of Intensive Medicine2021,1,1:3
16Notch mediates TGFα-induced changes in epithelial differentiation during pancreatic tumorigenesis显示文摘Yoshiharu Miyamoto Anirban Maitra Bidyut Ghosh Ulrich Zechner Pedram Argani Christine A. Iacobuzio-Donahue Virote Sriuranpong Tatsuya Iso Ingrid M. Meszoely Michael S. Wolfe Ralph H. Hruban Douglas W. Ball Roland M. Schmid Steven D. Leach 2003Cancer Cell2003,,6:3
17关于可热插拔系统器件的问题显示文摘大多数热插拔系统都存在一些内在的故障机理,其中一个是功率FET的安全工作区(SOA),另一个是拔出器件时从感应尖峰吸收能量的能力。本文阐述了不需采用瞬变抑制二极管、高标称值的功率器件和短路引脚,只采用集成的热插拔器件来解决这两个问题的方法。Alan Ball 2005电子产品世界2005,12,08B:2
18Field N 2 O, CO 2 and CH 4 fluxes in relation to tillage, compaction and soil quality in Scotland显示文摘Bruce C Ball Albert Scott John P Parker 1999Soil & Tillage Research1999,,1:2
19A scientific note on the detection of American strains of acute paralysis virus and Kashmir bee virus in dead bees in one US honey bee (Apis mellifera L) colony 显示文摘Hung A C F Ball B Shimanuki H Knox D A 1996Apidologie1996,27,:2
20Intra-abdominal hypertension and the abdominal compartment syndrome: updated consensus definitions and clinical practice guidelines from the World Society of the Abdominal Compartment Syndrome显示文摘Andrew W. Kirkpatrick Derek J. Roberts Jan Waele Roman Jaeschke Manu L. N. G. Malbrain Bart Keulenaer Juan Duchesne Martin Bjorck Ari Leppaniemi Janeth C. Ejike Michael Sugrue Michael Cheatham Rao Ivatury Chad G. Ball Annika Reintam Blaser Adrian Regli Zs 2013Intensive Care Medicine2013,,7:2
返回顶部 每页显示:
共348页 首页 上一页 第1页 下一页 末页 /348 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费