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18731篇 您的检索式:作者名="Ward"
    题名 作者 年代 出处 被引量
1A general-purpose machine learning framework for predicting properties of inorganic materials显示文摘A very active area of materials research is to devise methods that use machine learning to automatically extract predictive models from existing materials data.While prior examples have demonstrated successful models for some applications,many more applications exist where machine learning can make a strong impact.To enable faster development of machine-learning-based models for such applications,we have created a framework capable of being applied to a broad range of materials data.Our method works by using a chemically diverse list of attributes,which we demonstrate are suitable for describing a wide variety of properties,and a novel method for partitioning the data set into groups of similar materials to boost the predictive accuracy.In this manuscript,we demonstrate how this new method can be used to predict diverse properties of crystalline and amorphous materials,such as band gap energy and glass-forming ability.Logan Ward Ankit Agrawal Alok Choudhary Christopher Wolverton 2016npj Computational Materials2016,,1:83
2煤型稀有金属矿床:成因类型、赋存状态和利用评价显示文摘煤和含煤岩系中稀有金属元素的研究,是当今煤地质学研究的热点问题之一。煤和含煤岩系中高度富集并可以开发利用的稀有金属元素包括锂、钪、钛、钒、镓、锗、硒、锆、铌、铪、钽、铀、稀土元素(包括镧系元素和钇)、贵金属元素等。以煤-锗、煤-镓、煤-铀、煤-铌、煤-稀土元素等煤型稀有金属矿床为例,论述了这些矿床的地质成因、赋存状态和利用评价方法。煤型稀有金属矿床的研究,不仅对研究煤层的地质成因、煤层对比、含煤盆地形成与后期改造、区域地质历史演化和突发地质事件可以提供重要的煤地球化学和煤矿物学证据,而且对煤炭经济循环发展、煤炭利用过程中环境保护,以及对国家稀有金属资源安全也具有重要的现实和社会意义。代世峰 任徳贻 周义平 Vladimir VSeredin 李大华 张名泉 James C Hower Colin R Ward 王西勃 赵蕾 宋晓林 2014煤炭学报2014,39,8:111
3利用SSR标记进行优质冬小麦品种(系)的遗传多样性研究显示文摘遗传多样性研究对于作物育种具有重要意义。选择分布于 2 1条小麦染色体上的 5 9对 SSR引物对 4 8个优质冬小麦新品种 (系 )进行了遗传多样性分析。共检测出 2 0 9个等位位点 ,每对引物等位位点数在 2~ 9之间 ,平均为 3.5个。位点多态性信息含量 PIC变幅为 0 .16~ 0 .87,平均 0 .5 6。 8个引物组合在一起可将全部品种区分开来 ,4 8个品种可分为五类 ,分类结果与品种系谱比较吻合。结果表明 SSR分子标记在鉴别品种和品种遗传多样性研究方面具有重要作用。陈新民 何中虎 史建荣 夏兰芹 Rick Ward 周阳 蒋国梁 2003作物学报2003,29,1:65
4瑞舒伐他汀对存在亚临床动脉粥样硬化的低危人群颈动脉内膜中层厚度进展的影响——METEOR试验显示文摘背景:动脉粥样硬化往往在机体出现症状之前就已有所进展。目前,我们尚不清楚Framingham风险评分(Framinghaln risk score,FRS)较低的轻中度亚临床动脉粥样硬化中年人群是否能从治疗中获益。 目的:评价为期2年的他汀类药物治疗能否减缓颈动脉内膜中层厚度(carotid intimamedia thickness,CIMT)继续增厚或使粥样斑块消退。 设计、地点及参试者:“瑞舒伐他汀对内膜中层厚度影响的测评研究(Measuring Effects on Intima-Media Thickness:an Evaluation of Rosuvastatin,METEOR)”是2002年8月至2006年5月在美国及欧洲61个基层医疗中心开展的一项随机、双盲、安慰剂对照研究,共纳入984名参试者,有的参试者仅以年龄(平均年龄,57岁)为冠心病的危险因素,有的参试者10年内FRS低于10%、CIMT重庞增厚(1.2~3.5mm)、LDL胆固醇水平有所升高(平均值,154mg/dL)。 干预:参试者服用40mg瑞舒伐他汀或安慰剂。 主要观测指标:12个颈动脉位点最大CIMT的变化率(经B超检测);颈总动脉位点、颈动脉窦位点及颈内动脉位点最大CIMT的变化,颈总动脉位点平均CIMT的变化。仅在瑞舒伐他汀组中评估CIMT的消退情况。 结果:瑞舒伐他汀组参试者LDL胆固醇平均(SD)水平由基线时的155(24.1)mg/dL降至78(27.5)mg/dL,平均降低49%(与安慰剂组相比P〈0.001)。瑞舒伐他汀组12个颈动脉位点最大CIMT的变化值为-0.0014(95%CI,-0.0041~0.0014)mm/y,安慰剂组12个颈动脉位点最大CIMT的变化值为Q0131(95%CI,Q0087~Q0174)mm/y(P〈0.001)。瑞舒伐他汀组颈总动脉位点最大CIMT的变化值为-0.0038(95%CI,-0.0064~-0.0013)mm/y(P〈0.001),颈动脉窦位点最大CIMT的变化值为-0.0040(95%CI,-0.0090~0.0010)mm/y(P〈0.001),颈内动脉位点最大CIMT的变化值为0.0039(95%CI,-0.0009~0.0088)mm/y(P=0.02)。瑞舒伐他汀组颈总动脉位点平均CIMT的变化值为0.0004(95%CI,-0.0011~0.0019)mm/y(P〈0.001)。P值均为与安慰剂组相比。总的来说,瑞舒伐他汀具有良好的耐受性,很少引发严重的心血管不良事件(在2年内有6名参试者[0.86%]出现8起不良事件[1.1%])。 结论:对于FRS低于10%的亚临床动脉粥样硬化中年人群而言,瑞舒伐他汀能够在2年内显著降低最大CIMT的进展速率,与安慰剂相比差异具有统计学显著性。但是,瑞舒伐他汀无法诱导病变消退。今后,我们仍需开展大型远期试验来明确上述研究结果的临床意义.John R. Crouse Ⅲ Joel S. Raichlen Ward A. Riley Gregory W. Evans Mike K. Palmer Daniel H. O' Leary Diederick E. Grobbee Michiel L. Bots 李军(译) 2007美国医学会杂志(中文版)2007,26,4:44
5美国俄亥俄州立大学体育教育专业的特色及启示显示文摘从理念与培养目标、课程设置、师资队伍建设和学生实践经验培养等角度,对在全世界享有盛名的美国俄亥俄州立大学(Ohio State University,OSU)体育教育专业进行了剖析。研究认为,该校体育教育专业确立了学术、文化敏感性、体验、人格、社会效益和社会重构的培养理念,致力于为培养全球体育教育专业人才;课程设置强调通识课程的学习,着重提升学生的基本文化素养;重视体育教育类课程的学习,旨在夯实学生的体育教育专业基础;整体师资队伍一流,有利于为培养高水平的未来体育教师;强调多元文化融合,具有适应性体育教育的特色;通过建立'Learning to Teaching Physical Education'(学会教体育)项目,重视学生对学科内容知识(Content Knowledge)的学习,强调对体育课程模式的实践运用,以培养学生的实践经验。该校体育教育专业的改革与发展,对于我国体育教育专业的建设有着很好的启示作用。尹志华 汪晓赞 Phillip Ward 季浏 2016体育学刊2016,23,3:28
6胸腔镜肺叶切除术显示文摘背景与目的:尽管14年前我们就已报道在胸腔镜下可完成解剖意义上彻底的肺叶切除和淋巴结清扫,但关于这一术式的争论以及胸外科医师们提出的如何完成这种手术的疑问,使这种术式的被接受程度受到了限制。随着对这一术式持支持态度的人不断增多,这一术式的开展也越来越广泛。本文将讨论该术式的手术技术,临床疗效,以及关于这种术式的各种争论。方法:1992—2005年间我们共进行胸腔镜肺叶切除术1315例,其中女性700例(53.2%),男性615例(46.8%),患者平均年龄71.2岁。患者术后病理诊断:良性病变53例,肺部转移性肿瘤28例,淋巴瘤5例,肺癌1015例。腺癌在原发性肺癌中占63.1%。解剖意义上彻底的肺门切除和淋巴结活检或清扫均通过观察监视器屏幕完成,切口长约5cm,不需撑开肋骨。结果:9例(0.8%)死亡(无术中死亡及出血死亡患者)。932例(84.7%)术后没有出现并发症。1100例患者中有45例(4.1%)需输血。中位住院时间3d,平均住院时间4.78d。180例(20%)患者于术后第1天或第2天出院。28例(2.5%)患者术中转为开胸手术。5例(0.57%)患者术后切口出现复发。其中2003年内,在224例肺叶切除中89%通过胸腔镜完成。结论:在胸腔镜下可完成解剖意义上彻底的肺叶切除,且并发症率和死亡率较低。术中出血及切口复发的风险很小。Robert J McKenna Ward Houck 罗晓阳 2006中国癌症杂志2006,16,8:20
7Mechanisms underlying the impaired contractility of diabetic cardiomyopathy显示文摘Cardiac dysfunction is a well-known consequence of diabetes,with sustained hyperglycaemia leading to the development of a cardiomyopathy that is independent of cardiovascular disease or hypertension.Animal models of diabetes are commonly used to study the pathophysiology of diabetic cardiomyopathy,with the hope that increased knowledge will lead ultimately to better therapeutic strategies being developed.At physiological temperature,left ventricular trabeculae isolated from the streptozotocin rat model of type 1 diabetes showed decreased stress and prolonged relaxation,but with no evidence that decreased contractility was a result of altered myocardial Ca2+handling.Although sarcoplasmic reticulum(SR)Ca2+reuptake appeared slower in diabetic trabeculae,it was offset by an increase in actionpotential duration,thereby maintaining SR Ca2+content and favouring increased contraction force.Frequency analysis of t-tubule distribution by confocal imaging of ventricular tissue labeled with wheat germ agglutinin or ryanodine receptor antibodies showed a reduced T-power for diabetic tissue,but the differences were minor in comparison to other models of heart failure.The contractile dysfunction appeared to be the result of disrupted F-actin in conjunction with the increased typeⅠcollagen,with decreased myofilament Ca2+sensitivity contributing to the slowed relaxation.Marie-Louise Ward David J Crossman 2014World Journal of Cardiology2014,6,7:13
8Increased hepcidin expression in colorectal carcinogenesis显示文摘AIM:To investigate whether the iron stores regulator hepcidin is implicated in colon cancer-associated anae- mia and whether it might have a role in colorectal car- cinogenesis. METHODS: Mass spectrometry (MALDI-TOF MS and SELDI-TOF MS) was employed to measure hepcidin in urine collected from 56 patients with colorectal cancer. Quantitative Real Time RT-PCR was utilised to determine hepcidin mRNA expression in colorectal cancer tissue. Hepcidin cellular localisation was determined using im- munohistochemistry. RESULTS: We demonstrate that whilst urinary hepcidin expression was not correlated with anaemia it was posi- tively associated with increasing T-stage of colorectal cancer (P < 0.05). Furthermore, we report that hepcidin mRNA is expressed in 34% of colorectal cancer tissue specimens and was correlated with ferroportin repres- sion. This was supported by hepcidin immunoreactivity in colorectal cancer tissue. CONCLUSION: We demonstrate that systemic hepcidin expression is unlikely to be the cause of the systemic anaemia associated with colorectal cancer. However, we demonstrate for the first time that hepcidin is expressed by colorectal cancer tissue and that this may represent a novel oncogenic signalling mechanism.Douglas G Ward Keith Roberts Matthew J Brookes Howard Joy Ashley Martin Tariq Ismail Robert Spychal Tariq Iqbal Chris Tselepis 2008World Journal of Gastroenterology2008,14,9:12
9用RFLP方法研究陕西省主要小麦品种遗传多样性及其演变显示文摘研究用RFLP方法,对我国主要小麦产区,陕西省40年代以来广为种植的小麦品种的遗传多样性进行了研究,结果表明,占总带数26.2%的HINDII酶的RFLP带具有遗传多态性。24个小麦品种平均遗传相似系数为0.948。53.8%的探针显示了多态性。平均多态性信息含量指数为0.252。陕西省小麦品种遗传多样性以70年代为最高,之后开始降低。朱列层 唐国顺 HAZEN S P KIM H S WARD R W 1999西北植物学报1999,19,2:11
10Process structuring of polymers by solid phase orientation processing显示文摘Solid phase orientation of polymers is one of the most successful routes to enhancement of polymer properties.It unlocks the potential of molecular orientation for the achievement of a range of enhanced physical properties.We provide here an overview of techniques developed in our laboratories for structuring polymers by solid phase orientation processing routes,with a particular focus on die drawing,which have allowed control of significant enhancements of a single property or combinations of properties,including Young's modulus,strength,and density.These have led to notable commercial exploitations,and examples of load bearing low density materials and shape memory materials are discussed.COATES P.D. CATON-ROSE P. WARD I.M. THOMPSON G. 2013Science China Chemistry2013,56,8:11
11Narrative overview of animal and human brucellosis in Morocco: intensification of livestock production as a driver for emergence?显示文摘Brucellosis is one of the most widespread zoonoses in the world caused by several species of the genus Brucella.The disease,eradicated in many developed countries,is a re-emerging neglected zoonosis endemic in several zones especially in the Mediterranean region,impacting on human health and livestock production.A One Health approach could address brucellosis control in Morocco but scarcity of reliable epidemiological data,as well as underreporting,hinders the implementation of sustainable control strategies.Surveillance and control policies implemented by the Moroccan government in domestic animals(cattle and small ruminants)in the last few decades are assessed for disease impact.This study considers the origins of animal brucellosis in Morocco and the potential for emergence of brucellosis during a shift from extensive to intensive livestock production.Marie J.Ducrotoy Khaoula Ammary Hicham Ait Lbacha Zaid Zouagui Virginie Mick Laura Prevost Ward Bryssinckx Susan CWelburn Abdelali Benkirane 2015Infectious Diseases of Poverty2015,4,1:9
12Aurora A orchestrates entosis by regulating a dynamic MCAK-TIP150 interaction显示文摘PengXia JinhuaZhou Xiaoyu Song BingWu XingLiu Di Li Shuyuan Zhang Zhikai Wang H uijuan Yu Tarsha Ward Jiancun Zhang Yinmei Li Xiaoning Wang YongChen Zhen Guo Xuebiao Yao 2014Journal of Molecular Cell Biology2014,8,3:9
13体育教师教育研究的十大热点:基于2012年PETE大会以来的分析显示文摘体育教师教育(Physical Education Teacher Education)是西方体育科学研究的热点之一,为了解当前该领域的最新研究进展,分析了2012年PETE大会以及之后有关体育教师教育的研究文献,提出了当代体育教师教育研究的10个热点专题:即体育教师教育政策研究、体育教师教育标准研究,体育教师教育与信息技术整合,基于公共健康的CSPAP研究,基于标准的体育教师教育课程模式与计划,体育教师知识研究、职前体育教师实习研究、体育教师教育评价研究、体育教师专业发展研究、体育教师博士教育研究。总结了4个特点:即关注健康已成为体育教师教育的重要目标、对新技术的运用保持足够的敏感性、标准化的体育教师教育正在逐步深入、长期的专题研究保证了可持续发展。尹志华 汪晓赞 Phillip Ward 季浏 2016北京体育大学学报2016,39,10:8
14“利器”还是“鸡肋”——美国职前体育教师专业标准认证效果及对我国专业认证的警示显示文摘为了更好推动我国体育教育专业认证,基于大学教师视角,从对认证本身认知、准备认证感受、认证对学生影响、认证面临困难和应对策略四个角度对美国职前体育教师专业标准认证的效果进行了探索。认证会产生正面和负面效应,耗时是影响认证的最大障碍,不同层次大学对认证持不同态度,认证对教师的影响大于对学生的影响,认证对专业本身认可度的影响不明显。对中国体育教育专业认证而言,应注意正确引导大学体育教育专业认证工作,警惕专业认证异化为“材料撰写”过程,避免高水平大学对专业认证的“默默抵抗”,尽力发挥认证对体育教育专业人才培养的作用。尹志华 汪晓赞 孙铭珠 Phillip Ward 2021武汉体育学院学报2021,55,8:8
15Liver pathology of hepatitis C,beyond grading and stagingof the disease显示文摘Liver biopsy evaluation plays a critical role in management of patients with viral hepatitis C. In patients with acute viral hepatitis, a liver biopsy, though uncommonly performed, helps to rule out other nonviral causes of deranged liver function. In chronic viral hepatitis C, it is considered the gold standard in assessment of the degree of necroinflammation and the stage of fibrosis, to help guide treatment and determine prognosis. It also helps rule out any concomitant diseases such as steatohepatitis, hemochromatosis or others. In patients with chronic progressive liver disease with cirrhosis and dominant nodules, a targeted liver biopsy is helpful in differentiating a regenerative nodule from dysplastic nodule or hepatocellular carcinoma. In the setting of transplantation, the liver biopsy helps distinguish recurrent hepatitis C from acute rejection and also is invaluable in the diagnosis of fibrosing cholestatic hepatitis, a rare variant of recurrent hepatitis C. This comprehensive review discusses the entire spectrum of pathologic findings in the course of hepatitis C infection.Sadhna Dhingra Stephen C Ward Swan N Thung 2016World Journal of Gastroenterology2016,22,4:6
16The Mediterranean diet improves hepatic steatosis and insulin sensitivity in individuals with non-alcoholic fatty liver disease显示文摘Marno C. Ryan Catherine Itsiopoulos Tania Thodis Glenn Ward Nicholas Trost Sophie Hofferberth Kerin O’Dea Paul V. Desmond Nathan A. Johnson Andrew M. Wilson 2013Journal of Hepatology2013,,1:6
17Plasma microRNA profiles distinguish lethal injury in acetaminophen toxicity: A research study显示文摘AIM: To investigate plasma microRNA (miRNA) profiles indicative of hepatotoxicity in the setting of lethal acetaminophen (APAP) toxicity in mice. METHODS: Using plasma from APAP poisoned mice, either lethally (500 mg/kg) or sublethally (150 mg/kg) dosed, we screened commercially available murine microRNA libraries (SABiosciences, Qiagen Sciences, MD) to evaluate for unique miRNA profiles between these two dosing parameters. RESULTS: We distinguished numerous, unique plasma miRNAs both up- and downregulated in lethally compared to sublethally dosed mice. Of note, many of the greatest up- and downregulated miRNAs, namely 574-5p, 466g, 466f-3p, 375, 29c, and 148a, have been shown to be associated with asthma in prior studies. Interestingly, a relationship between APAP and asthma has been previously well described in the literature, with an as yet unknown mechanism of pathology. There was a statistically significant increase in alanine aminotransferase levels in the lethal compared to sublethal APAP dosing groups at the 12 h time point (P < 0.001). There was 90% mortality in the lethally compared to sublethally dosed mice at the 48 h time point (P = 0.011). CONCLUSION: We identified unique plasma miRNAs both up- and downregulated in APAP poisoning which are correlated to asthma development.Jeanine Ward Shashi Bala Jan Petrasek Gyongyi Szabo 2012World Journal of Gastroenterology2012,18,22:6
18师范类专业认证背景下体育教师专业发展学校(PEPDS)的建设:美国的经验与启示显示文摘师范类专业认证是近年来我国推进职前体育教师培养质量提升的关键措施,其中尤其重视对职前教师实践教学能力的培养,而通过建立教师专业发展学校(PDS)以促进职前教师实践教学经验积累是国外的普遍经验。美国体育教师专业发展学校(PEPDS)的建立背景包括:体育教师教育专业学生教学实践经验的缺失,大学研究人员和中小学体育教师专业发展的需要,降低青少年高肥胖率需要优质体育教师的参与,近年来教育政策对体育教师培养的消极影响。在教师专业发展学校标准的引领下,其运行措施包括打造学习共同体,明确各方责任,积极开展合作,注重多样性与公平性,优化组织结构和资源配置5个方面。未来我国应以专业认证为契机,重视职前体育教师实践性知识的掌握,尝试建立体育教师专业发展学校并改革课程设置,各级部门应提供政策支持与制度保障。尹志华 万雪 刘皓晖 Phillip Ward 2022体育教育学刊2022,38,2:6
19From Vulnerable Plaque to Vulnerable Patient: A Call for New Definitions and Risk Assessment Strategies: Part I显示文摘Morteza Naghavi Peter Libby Erling Falk S. Ward Casscells Silvio Litovsky John Rumberger Juan Jose Badimon Christodoulos Stefanadis Pedro Moreno Gerard Pasterkamp Zahi Fayad Peter H. Stone Sergio Waxman Paolo Raggi Mohammad Madjid Alireza Zarrabi Allen Bu 2003Circulation: Journal of the American Heart Association2003,,14:6
20Non-genetic contributions of the sperm nucleus to embryonic development显示文摘从几个实验室的最近的数据提供了最新使肥沃的卵母细胞从为合适的胚胎的开发被要求的精子染色质继承 epigenetic 信号的证据。为这评论的目的,术语 epigenetic 被用来描述从精子房间被传给胚胎的分子的信息的所有类型。当在哺乳动物或为为哪个有证据,它可以那么做为合适的 embryogenesis 被要求,有已经被建立了的 epigenetic 信息的至少六种不同形式。这些是(i) DNA methylation;(ii ) 精子特定的 histones,(iii ) 另外的联系染色质的蛋白质;(iv ) perinuclear 膜蛋白质;(v) 精子出生的 RNA 并且,这评论的焦点;并且(vi ) 由精子的 DNA 环领域组织原子矩阵。当为有效授精和随后的胚胎开发作为必要部件为帮助繁殖技术为精子的操作和 cryopreservation 设计协议时,这些 epigenetic 信号应该被考虑。Yasuhiro Yamauchi Jeffrey A Shaman W Steven Ward 2011Asian Journal of Andrology2011,13,1:6
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