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419篇 您的检索式:作者名="Logsdon"
    题名 作者 年代 出处 被引量
1基于低频滤波法的T-TDR含水率测量方法研究显示文摘为了解决T-TDR(Thermo-time domain reflectometry)探针短,土壤含水率测量效果差等技术问题,提出了一种低频滤波法LFF(Low frequency filter)进行TDR波形分析的计算模型。通过对TDR波形快速傅里叶变换,得到组成TDR波形的频谱,对其低频滤波后重新快速傅里叶反变换,可实现LFF变换。试验通过4种土壤,每种5个含水率的20个土样进行测试,通过LFF法和传统WINTDR法对比,结果表明LFF法具有较好的计算结果,其与干燥法的决定系数R2达0.983 5。LFF法不仅有效提高了T-TDR短针土壤含水率的测试精度,还简化了土壤含水率测试校验程序,提高了测试效率。许景辉 马孝义 Sally D Logsdon 2014农业机械学报2014,45,6:6
2Roles for KRAS in Pancreatic Tumor Development and Progression显示文摘Marina Pasca di Magliano Craig D. Logsdon 2013Gastroenterology2013,,6:3
3基于土壤LFUHF频段介电特性的FDR测量频率研究显示文摘土壤介电特性是影响FDR传感器测量土壤含水量精度和适应性的重要物理参数。为了确定28 mm长、10 mm间距的7探针FDR传感器理想频率,通过矢量网络分析仪对4种不同土壤的LF-UHF频段(1 MHz~3 GHz)散射参数进行了测量,通过Logsdon和Laird模型变换,使用Matlab进行了4种土壤表观介电常数的计算和绘制。通过土壤介电频谱分析,研究了土壤极化机理,分析了土壤介电特性与频率的关系,确定了FDR传感器的工作频段为44~398 MHz,考虑到温度对极化的影响,其最佳工作频段为62~110 MHz,其中75 MHz是其工作的最佳频率。此频率下土壤介电值仅对土壤含水量敏感,是消除温度等因素对FDR传感器影响的理想频率。许景辉 马孝义 Sally D Logsdon Robert Horton 2013农业机械学报2013,44,7:3
4Software piracy: Is it related to level of moral judgment?显示文摘Jeanne M. Logsdon Judith Kenner Thompson Richard A. Reid 1994Journal of Business Ethics1994,,11:2
5How corporate social responsibility pays off显示文摘Lee Burke Jeanne M. Logsdon 1996Long Range Planning1996,,4:2
6Inhibition of the Hedgehog Pathway Targets the Tumor-Associated Stroma in Pancreatic Cancer显示文摘Rosa F. Hwang Todd T. Moore Maureen Mertens Hattersley Meghan Scarpitti Bin Yang Erik Devereaux Vijaya Ramachandran Thiruvengadam Arumugam Baoan Ji Craig D. Logsdon Jeffrey L. Brown Robert Godin 2012Molecular Cancer Research2012,,9:2
7Quality of life in Alzheimer's disease显示文摘Logsdon RG Gibbons LE McCurry SM 1999Ment Health Aging1999,5,:1
8Molecular profiling of pancreatic adenocarcinoma and chronic pancreatitis identifies multiple genes differentially regulated in pancreatic cancer 显示文摘Logsdon CD Simeone DM Binkley C 2003Cancer Res2003,63,10:1
9Tillage effect on macroporosity and herbicide transport in percolate显示文摘Malone R W Logsdon S Shipitalo M J 2003Geoderma2003,116,12:1
10Assessing Quality of life in Older Adult With Cogrtive Impairment显示文摘Rebecca C Logsdon LC Laura E 2002Psychosomatic Medicine2002,64,:1
11Field-scale nitrogen balances associated with long-term continuous corn production显示文摘Karlen D L Kramer L A Logsdon S D 1998Agronomy Journal1998,9,5:1
12SIVsm quasispecies adaptation to a new simian host显示文摘Demma LJ Logsdon JM Jr Vanderford TH 2005PLoS Pathog2005,1,1:1
13Crystal structures of a muhidrug-resistant human immunodeficiency virus type 1 protease reveal an expanded active-site cavity显示文摘Logsdon BC Vickrey JF Martin P 2004J Virol2004,78,6:1
14Principles of internal corrosion and corrosion monitoring显示文摘Kirmyer G J Logsdon G S 1983 1983AWWA1983,75,4:1
15Lymphoma of the nasal cavity and paranasal sinuses improved outcome and altered prog-nostic factors with combined modality therapy显示文摘Logsdon MD HaCS KavadiVS 1997Cancer1997,80,3:1
16Evidence based psychological treatments for insomnia in older adults显示文摘McCurry SM Logsdon RG Teri L 2007Psychol Aging2007,22,1:1
17Training community consultants to help family members improve dementia care:a randomized controlled trial显示文摘Teri L McCurry SM Logsdon R 2005Gerontologist2005,45,6:1
18S100P:a novel therapeutic target for cancer显示文摘Arumugam T Logsdon CD 0,,04:1
19The neonatal skin risk assessment scale for predictingskin breakdown in neonates显示文摘Huffines B Logsdon MC 1997Issues Compr Pediatr Nurs1997,20,2:1
20How corporate social responsibility pays off显示文摘BURKE L LOGSDON J M 1996Long Range Planning1996,29,4:1
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