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1464篇 您的检索式:作者名="Schweitzer"
    题名 作者 年代 出处 被引量
1黄土高原蔡家川林场森林质量评价显示文摘在综合考虑林分结构、群落演替特征和林地生产力水平的基础上,应用层次分析方法,以陕西延安市黄龙山林业局蔡家川林场为例,构建天然次生林森林质量评价模型和指标体系,得到油松林、辽东栎林、白桦林、油松-辽东栎混交林、油松-白桦混交林和辽东栎-白桦混交林的综合质量评分值。结果表明:采用森林结构、演替趋势和林地生产力3大类8个评价指标(郁闭度、物种丰富度、均匀度、枯枝落叶厚度、乔木蓄积量、灌草生物量、幼苗数量及优势种幼树幼苗与乔木数量之比)可以较为全面地反映该地区次生林质量状况,森林结构对森林质量影响较大,群落演替状况次之,林地生产力影响较小,评价指标对森林质量的贡献值由大到小依次为林分郁闭度0.3562,枯枝落叶厚度0.2116,优势种幼树幼苗与乔木数量之比0.1305,均匀度0.1058,乔木蓄积量0.0826,物种丰富度0.0644,幼苗数量0.0372,灌草生物量0.0118;天然林保护工程实施10多年来,蔡家川林场林分综合得分值28.0~92.2,接近一半的森林处于较好水平,质量差和较差的林分极少,油松、辽东栎及油松-辽东栎天然次生林质量相对较好,林分综合得分值65~73,而白桦林、辽东栎-白桦混交林和油松-白桦混交林的林分质量较差,综合评分值均低于60.00;该评价方法操作简单,可以解决森林质量评价中的量化问题,评价模型和指标体系可以在黄土高原其他地区的次生林质量评价中借鉴和应用。王乃江 张文辉 同金霞 范少辉 陆元昌 Callie Jo Schweitzer 2010林业科学2010,46,9:29
2急性创伤性肩关节后脱位的MR表现显示文摘目的回顾性生分析在首次创伤性肩关节后脱位后的盂肱关节骨与软组织损伤的MRI表现。方法本研究符合HIPAA(健康保险条例)要求,并经学术审查委员会批准并取得所有病人的知情同意。对36例男性病人(15~80岁,平均40-2岁)临床表现为首次创伤性肩关节后脱位,行MR关节成像检查(18例)或常规MRI检查(18例)。36例中,电击伤1例,癫痫1例,另34例为创伤所致。评价内容包括Hill—Sachs病变、肩袖撕裂、肱二头肌肌腱异常、后盂唇关节囊复合伤、肱骨头移位以及肩盂后倾角。统计学分析采用Spearman等级相关分析和t检验完成。N. Saupe L.M. White R. Bleakney M.E. Schweitzer M.P. Recht B. Jost 白荣杰(译) 唐光健(校) 2008国际医学放射学杂志2008,31,5:18
3HIGH TEMPERATURE DISPLACEMENT SENSOR显示文摘A high temperature displacement sensor based on the principle of eddy-current is investigated. A new temperature compensation technique by using eddy-current effect is presented to satisfy the special requirement at high temperature up to 550℃. The experiment shows that the temperature compensation technique leads to good temperature stability for the sensors. The variation of the sensitivity as well as the temperature drift of the sensor with temperature compensation technique is only about 7.4% and 90~350 mV at 550℃ compared with that at room temperature, and that of the sensor without temperature compensation technique is about 31.2% and 2~3 V at 550℃ compared with that at room temperature. A new dynamic calibration method for the eddy-current displacement sensor is presented, which is very easy to be realized especially in high frequency and at high temperatures. The high temperature displacement sensors developed are successfully used at temperature up to 550℃ in a magnetic bearing system for more than 100 h.Xu Longxiang Zhang Jinyu Schweitzer Gerhard 2005Chinese Journal of Mechanical Engineering2005,18,3:11
4牙科医源性牙折显示文摘本文讨论了可能由牙科医师造成的医源性牙折,探讨了造成这种牙折的原因及预防医源性牙折的可能途径。作者强调指出,大多数牙科医源性牙折是能够预防的。Schweitzer J I 张光诚 1990国外医学(口腔医学分册)1990,17,1:8
5中德家庭治疗师对系统家庭治疗应用的评价显示文摘目的:比较系统家庭治疗在中德不同社会文化背景下应用的特点和屏障,为系统家庭治疗在国内的推广和本土化提供客观依据。方法:选取82名中国和76名德国系统家庭治疗师,使用自编系统家庭治疗临床应用情况调查表来调查专业和工作背景、临床工作情况、心理治疗培训情况、系统家庭治疗推广情况及应用系统家庭治疗的体会和评价,以频数统计、内容编码等方式分析数据并作比较。结果:中国治疗师中具有医学背景者占77%,而德国治疗师具有心理学、教育学或社会工作背景者占76%。德国治疗师接受督导者多于中国治疗师(76%vs.38%,P<0.01)。德国治疗师评价系统家庭治疗在工作中的推广程度(中位数=4.0)高于中国治疗师(中位数=3.0,P<0.05);德国治疗师评价系统思维对其日常'工作的帮助(中位数=6.0)高于中国治疗师(中位数=5.0,P<0.01)。中德治疗师最常见的培训动机是工作需要'(n=41、61);中德治疗师共同评价临床应用最突出难点是治疗技术和方法本身的复杂性(n=67、65)、而中国治疗师提到的另一常见难点是咨客不合作(n=50);系统家庭治疗对两国治疗师个人生活的影响归为8个主类别,中德治疗师最常见的影响是'对问题和关系有了新的看法'(n=28、25),中国治疗师另一个突出影响是'接纳多样性'(n=25),而德国治疗师是'以资源取向和欣赏的态度看待人和事'(n=22)。结论:两国治疗师的临床应用体会体现出了文化差异,在治疗中应重视文化因素的作用。史靖宇 SCHWEITZER Jochen 赵旭东 2014中国心理卫生杂志2014,28,1:5
6二十世纪九十年代中美电视广告中的文化价值比较显示文摘这篇文章对1993年中美两国1105个电视广告的内容进行了分析,并得出了八种在中美两国居于主导地位的文化价值。总体而言,美国的电视广告中,对于象征性和实用性的价值都有所体现,而中国则更多地诉诸于象征性的文化价值。研究结果表明,如今的中国广告业既是一个融会东西方文化的“大熔炉”,又是一面“双重扭曲的镜子”。中国的广告业以一种适应中国社会现实特质的强劲发展态势,体现着广告所具有的商业属性。而熔炉的开放性以及扭曲的双面镜日益闭合的趋势,对于整个行业发展及广告研究都有着深远的影响。研究还发现,中国电视广告中所描述的文化价值,大多与产品类别和产品起源有关。传递西方文化价值的主要是进口产品以及一些合资企业产品的广告。HONG CHENG JOHN C. SCHWEITZER 崔彤彦 2006广告大观(理论版)2006,0,4:4
7Hardy Weinberg Equilibrium in Genetic PE Research Remains Critical to Avoid Misinterpretation显示文摘Marcel D. Waldinger Paddy K.C. Janssen Dave H. Schweitzer 2009Asian Journal of Andrology2009,11,4:3
8Closed reduction and iliosacral percutaneous fixation of unstable pelvic ring fractures显示文摘Daniel Schweitzer Alejandro Zylberberg Marcelo Córdova Jaime Gonzalez 2008Injury2008,,8:3
9hsa-mir-183 is frequently methylated and related to poor survival in human hepatocellular carcinoma显示文摘AIM To screen clinically relevant micro RNAs (mi RNAs) silenced by DNA methylation in human hepatocellular carcinoma(HCC).METHODS Knockdown of DNA methyltransferases (DNMTs) using si RNAs and mi RNA profiling in HCC cell lines were performed to identify DNA hypermethylation-mediated mi RNA downregulation. Confirmation using individual quantitative real-time PCR (qR T-PCR) assays was thenperformed followed by DNA methylation quantification at the promoter of the mi RNA genes. Quantification of DNA methylation and mi RNA expression was then performed in primary HCC tumor samples and related with clinicopathological variables.RESULTS mi RNA profiling after DNMT knockdown in HCC cell lines revealed upregulation of mi R-23, mi R-25 and mi R-183. After q RT-PCR confirmation and Cp G island methylation quantification of these miR NAs in cell lines, further analysis in primary HCC specimens showed that hsa-mi R-183 is hypermethylated in 30% of HCC (n = 40). Expression of mature miR-183 showed an inverse correlation with DNA methylation levels. In HCC cells, DNMT knockdown and 5-aza-2'-deoxycytidine treatment reduced methylation and stimulated expression of mi R-183. In HCC patients, hypermethylation at hsami R-183 promoter significantly correlates with poor survival (log-rank test P = 0.03). DNA methylation analysis in healthy liver, benign liver tumors (hepatocellular adenoma and focal nodular hyperplasia) and their corresponding adjacent tissues showed absence of hypermethylation supporting the notion that aberrant methylation at hsa-miR-183 is specific for the malignant transformation of hepatocytes.CONCLUSION Our data indicate that hypermethylation of hsa-miR-183 is a frequent event in HCC and potentially useful as a novel surrogate diagnostic and prognostic marker.Sumadi Lukman Anwar Till Krech Britta Hasemeier Elisa Schipper Nora Schweitzer Arndt Vogel Hans Kreipe Reena Buurman Britta Skawran Ulrich Lehmann 2017World Journal of Gastroenterology2017,23,9:3
10Estimations of worldwide prevalence of chronic hepatitis B virus infection: a systematic review of data published between 1965 and 2013显示文摘Aparna Schweitzer Johannes Horn Rafael T Mikolajczyk Gérard Krause J?rdis J Ott 2015The Lancet . 2015 (1000)2015,,:2
11SKF创新轴承技术应用于复合式涡轮增压器显示文摘传动系统是汽车工业的研发重点,为改进柴油发动机的性能提供支持,以符合欧盟和美国日益严格的法规规定。SKF致力于为各种复杂的涡轮增压器研制特别的滚动轴承。Ferdinand Schweitzer 2008汽车与配件2008,,1:2
12Serum and liver micronutrient antioxidants and serum oxidative stress in patients with chronic hepatitis C显示文摘Dhiraj Yadav Hilary I Hertan P Schweitzer E.P Norkus C.S Pitchumoni 2002The American Journal of Gastroenterology2002,,10:2
13A next-generation marker genotyping platform(AmpSeq)in heterozygous crops:a case study for marker-assisted selection in grapevine显示文摘Marker-assisted selection(MAS)is often employed in crop breeding programs to accelerate and enhance cultivar development,via selection during the juvenile phase and parental selection prior to crossing.Next-generation sequencing and its derivative technologies have been used for genome-wide molecular marker discovery.To bridge the gap between marker development and MAS implementation,this study developed a novel practical strategy with a semi-automated pipeline that incorporates trait-associated single nucleotide polymorphism marker discovery,low-cost genotyping through amplicon sequencing(AmpSeq)and decision making.The results document the development of a MAS package derived from genotyping-by-sequencing using three traits(flower sex,disease resistance and acylated anthocyanins)in grapevine breeding.The vast majority of sequence reads(⩾99%)were from the targeted regions.Across 380 individuals and up to 31 amplicons sequenced in each lane of MiSeq data,most amplicons(83 to 87%)had<10%missing data,and read depth had a median of 220–244×.Several strengths of the AmpSeq platform that make this approach of broad interest in diverse crop species include accuracy,flexibility,speed,high-throughput,low-cost and easily automated analysis.Shanshan Yang Jonathan Fresnedo-Ramíre Minghui Wang Linda Cote Peter Schweitzer Paola Barba Elizabeth M Takacs Matthew Clark James Luby David C Manns Gavin Sacks Anna Katharine Mansfield Jason Londo Anne Fennell David Gadoury Bruce Reisch Lance Cadle-Davidson Qi Sun 2016Horticulture Research2016,3,1:2
14Appointments of academic directors显示文摘Joshua T. White Tracie Woidtke Harold A. Black Robert L. Schweitzer 2013Journal of Corporate Finance2013,,:2
15系统式治疗的理论显示文摘系统的概念心理治疗师所说的'系统',是指社会系统内各个成员之间的相互交流,如夫妻、家庭、邻居、医患关系、小组、机构、照顾系统等;也包括由这些交流所引发的生理心理过程,如思维、情感、激素分泌或疾病。心理治疗中的'系统式'观察方法。Jochen Schweitzer Gunthard Weber 盛晓春 1998德国医学1998,15,4:2
16Semliki Forest virus vectors: efficient vehicles for in vitro and in vivo gene delivery显示文摘 Schweitzer C Rotmann D 2001FEBS Lett2001,504,3:1
17Mechanics of secondary hydrocarbon migration and entrapment显示文摘SCHWEITZER T T 1979AAPG Bulletin1979,63,5:1
18Medial collateral ligament injuries: evaluation of multiple signs, prevalence and location of associated bone bruises, and assessment with MR imaging显示文摘Schweitzer ME Tran D Deely DM 1995Radiology1995,194,3:1
19Increasedrates of Donation with Nephrectomy 显示文摘Eugene J Schweitzer 2009Annals of Surgery2009,3,232:1
20显示文摘Lara Wilfredo C Schweitzer Jeremy 1998Journal of Long-Term Effects of Medical Implants1998,8,1:1
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