维普中文期刊产品整合服务
66篇 您的检索式:作者名="Martin Schulz"
    题名 作者 年代 出处 被引量
1基于电磁阀的喷嘴直接注入式农药喷洒系统显示文摘设计了一种喷嘴直接注入式农药喷洒系统。通过与传统喷雾机械比较,简述了喷嘴直接注入式喷雾系统的结构和喷雾执行单元。为了实现农药定量注入,设计一种基于电磁原理的快速响应阀,并论述其工作原理和闭环控制方式。通过试验测试了喷雾执行单元的喷雾特性和喷杆组内各喷雾单元的一致性。结果表明在一定喷洒速率范围内,喷雾执行单元的喷水量和水压强存在多项式关系,农药注入量和PWM信号的高电平时间存在指数关系,其决定系数均高于0.9,并且同一喷杆组内6个喷雾单元的喷雾效果大体一致。蔡祥 Walgenbach Martin Doerpmund Malte Schulze Lammers Peter 孙宇瑞 2013农业机械学报2013,44,6:13
2Testicular expression of survivin and human telomerase reverse transcriptase(hTERT)associated with spermatogenic function in infertile patients显示文摘瞄准:与改变精子发生的功能在人的睾丸描绘 survivin, apoptosis (国际星际航空联合会) 的一个禁止者,和人的 telomerase 颠倒 transcriptase (hTERT ) 的 coexpression。方法:survivin mRNA 和 hTERT mRNA 的抄本层次用即时反向抄写的聚合酶链反应(RT-PCR ) 与有缺点的精子发生(n=28 ) 在正常睾丸(n=11 ) 和睾丸被决定。组织学的病情的检查根据一个修改 Johnsen 分数被执行。结果:survivin 和 hTERT 的表情在正常精子发生在 96.8 和 709 的中部的层次是最高的并且随减数分裂后精子发生的拘捕(n=10 ) 在睾丸落下到 53.3 和 534。在严重精子发生的失败( n=18 ), survivin 表示缺乏大多数标本( n=16 ),而阴囊的 hTERT 表示的至少底层在 premeiotic 精子发生的拘捕( n=7 )与 73 的规范的表情大部分是可检测的并且 45 在有 Sertoli 房间唯一的症候群( SCOS )( n=3 )的病人。survivin 和 hTERT 表情与一个进行的 Johnsen 分数(为 trend=0.001 的 P ) 增加了。结论:尽管 survivin 和 hTERT 与精子发生的功能被相关,他们在不肥沃的病人的睾丸显示出不同表示模式。这些调查结果在在 meiotically 划分生殖细胞建议 survivin 的占优势的表情的啮齿类动物睾丸从研究证实结果。Steffen Weikert Frank Christoph Wolfgang Schulze Hans Krause Carsten Kempkensteffen Martin Schostak Kurt Miller Mark Schrader 2006Asian Journal of Andrology2006,8,1:8
3喷嘴直接注入式农药喷洒系统控制方法研究显示文摘为了实现农药变量喷洒,准确计量和控制农药的注入速率和注入量很有必要。提出了一种喷嘴直接注入式系统(DNIS)原型,并在此基础上研究了农药喷洒量的控制方法。该系统应用快速响应电磁阀(RRV)向水中注入农药,RRV由100 Hz的脉宽调制(PWM)信号驱动,通过改变PWM信号占空比调节农药注入速率。试验室环境下设计了基于比例-积分-微分(PID)算法的闭环控制策略,将农药注入速率快速稳定在设定值。通过试验测试了RRV、DNIS系统和PID控制器的工作性能。试验结果表明,采用RRV可准确计量农药注入速率,闭环控制策略可获得较稳定的农药速率控制效果,农药注入速率可在4 s内达到设定值,注入速率的稳定性相对于没有控制策略有明显提高。蔡祥 Martin Walgenbach Mahe Doerpmund Peter Schulze Lammers 孙宇瑞 赵燕东 2016农业机械学报2016,47,11:7
4Effects of Potassium and Manganese Promoters on Nitrogen-Doped Carbon Nanotube-Supported Iron Catalysts for CO_2 Hydrogenation显示文摘氮掺杂碳纳米管(NCNTs)作为载体负载铁(Fe)纳米颗粒,可应用于CO_2多相催化加氢反应(633 K和25 bar)。当将钾(K)和锰(Mn)作为助催化剂时,Fe/NCNT展现出优异的CO_2加氢性能,在体积空速(GHSV)为3.1 L·g^(–1)·h^(–1)时转化率可达34.9%。当使用K作为助催化剂时,反应对烯烃和短链烷烃具有高的选择性。当K和Mn同时作为助催化剂时,其催化活性能够稳定地维持60 h。助催化剂Mn的结构效应通过X射线衍射、氢气程序升温还原以及近边X射线吸收精细结构进行表征。助催化剂Mn不仅能够稳定中间态FeO,且能降低程序升温还原的起始温度。通过探针反应NH3的催化分解来表征助催化剂效应。当K和Mn作为助催化剂时,Fe/NCNT具有最好的催化活性。在还原条件下,当K作为助催化剂时,Fe/NCNT具有最优异的热稳定性。Praewpilin Kangvansura Ly May Chew Chanapa Kongmark Phatchada Santawaja Holger Ruland Wei Xia Hans Schulz Attera Worayingyong Martin Muhler 2017Engineering2017,3,3:6
5National Forest Inventories capture the multifunctionality of managed forests in Germany显示文摘Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forestry,combining timber production with the supply of other forest ecosystem services.However,it is unclear which forest types provide which ecosystem services and to what extent forests primarily managed for timber already supply multiple ecosystem services.Based on a comprehensive dataset collected across 150 forest plots in three regions differing in management intensity and species composition,we develop models to predict the potential supply of 13 ecosystem services.We use those models to assess the level of multifunctionality of managed forests at the national level using national forest inventory data.Results:Looking at the potential supply of ecosystem services,we found trade-offs(e.g.between both bark beetle control or dung decomposition and both productivity or soil carbon stocks)as well as synergies(e.g.for temperature regulation,carbon storage and culturally interesting plants)across the 53 most dominant forest types in Germany.No single forest type provided all ecosystem services equally.Some ecosystem services showed comparable levels across forest types(e.g.decomposition or richness of saprotrophs),while others varied strongly,depending on forest structural attributes(e.g.phosphorous availability or cover of edible plants)or tree species composition(e.g.potential nitrification activity).Variability in potential supply of ecosystem services was only to a lesser extent driven by environmental conditions.However,the geographic variation in ecosystem function supply across Germany was closely linked with the distribution of main tree species.Conclusions:Our results show that forest multifunctionality is limited to subsets of ecosystem services.The importance of tree species composition highlights that a lack of multifunctionality at the stand level can be compensated by managing forests at the landscape level,when stands of complementary forest types are combined.These results imply that multi-purpose forestry should be based on a variety of forest types requiring coordinated planning across larger spatial scales.Nadja K.Simons María R.Felipe-Lucia Peter Schall Christian Ammer Jürgen Bauhus Nico Blüthgen Steffen Boch François Buscot Markus Fischer Kezia Goldmann Martin M.Gossner Falk Hänsel Kirsten Jung Peter Manning Thomas Nauss Yvonne Oelmann Rodica Pena Andrea Polle Swen C.Renner Michael Schloter Ingo Schöning Ernst-Detlef Schulze Emily F.Solly Elisabeth Sorkau Barbara Stempfhuber Tesfaye Wubet Jörg Müller Sebastian Seibold Wolfgang W.Weisser 2021Forest Ecosystems2021,8,1:2
6Recruitment of an inotropic reserve in moderately ischemic myocardium at the expense of metabolic recovery:a model of short term hibernation显示文摘Schulz R Guth BD Martin C 1992Cir Res1992,70,:1
7Codification and tacitness as knowledge management strategies an empirical exploration显示文摘Martin Schulz Lloyd A Jobe 2001The Journal of High Technology Management Research2001,12,:1
8Prevalence of human gammaretrovirus XMRV in sporadic prostate cancer显示文摘Nicole Fischer Olaf Hellwinkel Claudia Schulz Felix K.H. Chun Hartwig Huland Martin Aepfelbacher Thorsten Schlomm 2008Journal of Clinical Virology2008,,3:1
9The probiotic Escherichia coli strain Nissle 1917 (EcN) stops acute diarrhoea in infants and toddlers显示文摘Jobst Henker Martin Laass Boris M. Blokhin Yuriy K. Bolbot Vitaliy G. Maydannik Martina Elze Corinna Wolff Jürgen Schulze 2007European Journal of Pediatrics2007,,4:1
10Codification and Tacitness as Knowledge Management Strategies,An Empirical Exploration显示文摘Martin Schulz Lloyd A Jobe 2001Journal of High Technology Management Research2001,,12:1
11Probiotic Escherichia coli Nissle 1917 Versus Placebo for Treating Diarrhea of Greater Than 4 Days Duration in Infants and Toddlers显示文摘Jobst Henker Martin W. Laass Boris M. Blokhin Vitaliy G. Maydannik Yuriy K. Bolbot Martina Elze Corinna Wolff Armin Schreiner Jürgen Schulze 2008The Pediatric Infectious Disease Journal2008,,6:1
12An XPS study on the attachment of triethoxsilylbutyraldehyde to two titanium surfaces as a way to bond chitosan显示文摘Martin H J Schulz K H Bumgardner J D 2008Applied Surface Science2008,254,15:1
13TIMP-1/-2 and transient elastography allow non invasive diagnosis of cystic fibrosis associated liver disease显示文摘Timo Rath Katrin Menendez Menendez Marion Kügler Lisa Hage Christian Wenzel Richard Schulz Jürgen Graf Lutz N?hrlich Elke Roeb Martin Roderfeld 2012Digestive and Liver Disease2012,,9:1
14Arthroscopic evaluation of articular cartilage lesions in posterior cruciate ligament—Deficient knees显示文摘Michael J. Strobel Andreas Weiler Martin S. Schulz Kai Russe H.Jürgen Eichhorn 2003Arthroscopy: The Journal of Arthroscopic and Related Surgery2003,,3:1
15Childhood-onset schiz- ophrenia: history of the concept and recent studies 显示文摘Remschmidt HE Schulz E Martin M 1994Schizophr Bull1994,20,4:1
16Some recent trends in research and technology of advanced thermal barrier coatings显示文摘Uwe Schulz Christoph Leyens Klaus Fritscher Manfred Peters Bilge Saruhan-Brings Odile Lavigne Jean-Marc Dorvaux Martine Poulain Remy Mévrel Micha?l Caliez 2002Aerospace Science and Technology2002,,1:1
17Infectious Schmallenberg Virus from Bovine Semen,Germany显示文摘Schulz C Wernike K Martin Beer M 2014Emerg Infect Dis2014,20,2:1
18Pancreas-kidney transplantation with urinary bladder and enteric exocrine diversion:seventy cases without anastomotic complications显示文摘Büsing M Martin D Schulz T 1998Transplant Proc1998,30,2:1
19Knowledge creation in new product development projects 显示文摘Schulze Anja and Hoegl Martin 2006Journal of Management2006,32,2:1
20Microdialysis - based analysis of interstitial NO in situ:NO synthase - independent NO formation during myocardial ischemia 显示文摘Martin C Schulz R Post H 2007Cardiovasc Res2007,74,1:1
返回顶部 每页显示:
共4页 首页 上一页 第1页 下一页 末页 /4 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