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267篇 您的检索式:作者名="Shabtai"
    题名 作者 年代 出处 被引量
1应用热扩散法测定香蕉树蒸腾速率显示文摘香蕉树植株高大,一般采用间接方法确定耗水量,但所得结果受土壤、大气和农艺措施等因素的影响较大.本文于2005年11月15日—12月5日在温室内采用热扩散法(即Granier法)测定香蕉树的茎液流,并与用数字天平(称重法)测定的香蕉树蒸腾速率进行对比试验.结果表明,Granier法测定的日茎液流量与称重法测定的日蒸腾量相差4%.Granier法测定的茎液流速率一般滞后于称重法确定的蒸腾速率1h左右.当日蒸腾量小于0.05L.m-2(活性叶面积)时,Granier方法不能测定茎液流量.Granier传感器一般在安装2~3d后即可正常工作,同时在多株植株上安装Granier传感器取其平均流速值计算蒸腾量可以明显减小测量误差.刘海军 SHABTAI Cohen JOSEF Tanny 黄冠华 2007应用生态学报2007,18,1:18
2利用林窗部分转换技术测定苹果树冠层结构显示文摘常规直接测定果树冠层结构几乎是不可能的,目前主要用间接测定的方法。利用林窗部 分转换技术(GFTT)测定三种不同砧木(M9,MM106,Hashabi)金冠苹果园的冠层结构,结果表明,不同 砧木苹果树叶面积相差很大,但叶面积指数差异不大。用林窗部分转换技术测定的叶面积与用叶 面积积仪测定的结果差异少于1个叶面积指数,说明这一技术是可行的。此外,两个苹果园(M9, MM106砧木)用上述两种方法测出的叶面积指数均无差异,又说明林窗部分转换技术测定的叶面 积指数具有相对的准确性。李伏生 Shabtai Cohen 2000果树科学2000,17,2:9
3温室内香蕉树蒸腾量预报的试验研究显示文摘在温室内研究了香蕉树蒸腾量和小气候的关系,用5种方法计算了温室内的参考作物腾发量,用20 cm蒸发皿测定温室内的水面蒸发力,并和测定的香蕉树蒸腾量进行对比.试验结果显示香蕉树蒸腾量和蒸发皿水面蒸发量的回归系数(R2)最高,为0.94,而和5种公式计算的参考作物腾发量的回归系数为0.47~0.60,以蒸发皿水面蒸发量计算温室内的作物蒸腾量要优于以参考作物腾发量计算作物蒸腾量的方法.温室内香蕉树的蒸腾量和20 cm蒸发皿蒸发量线性相关,可以此计算温室内作物的蒸腾量.刘海军 黄冠华 Josef Tanny Shabtai Cohen 2007农业工程学报2007,23,3:8
4Worldwide spread of the Ponseti method for clubfoot显示文摘The Ponseti method has become the gold standard for the treatment of idiopathic clubfoot. Its safety and efficacy has been demonstrated extensively in the literature, leading to increased use around the world over the last two decades. This has been demonstrated by the increase in Ponseti related Pub Med publications from many countries. We found evidence of Ponseti activity in 113 of 193 United Nations members. The contribution of many organizations which provide resources to healthcare practitioners in low and middle income countries, as well as Ponseti champions and modern communication technology, have helped to spread the Ponseti method around the world. Despite this, there are many countries where the Ponseti method is not being used, as well as many large countries in which the extent of activity is unknown. With its low rate of complication, low cost, and high effectiveness,this method has unlimited potential to treat clubfoot in both developed and undeveloped countries. Our listing of countries who have not yet shown presence of Ponseti activity will help non-governmental organizations to target those countries which still need the most help.Lior Shabtai Stacy C Specht John E Herzenberg 2014World Journal of Orthopedics2014,5,5:7
5网室内小气候要素的变化规律显示文摘在以色列的大型香蕉种植网室内(352m×228m),观测研究网室内小气候的变化过程、垂直分布规律以及与网室外小气候要素的关系。结果显示,网室的光透射率随着使用时间的增加而减小;网室内外小气候要素间呈线性相关关系,与网室外相比,网室内的相对湿度高、饱和水汽压差小、风速显著降低,但是温度差异较小;网室内外小气候要素(相对湿度、温度和饱和水汽压差)的差异随着风速的增加而减小;网室内冠层附近水汽密度高于近地面处的水汽密度,且出现逆温分布。刘海军 黄冠华 Josef Tanny Shabtai Cohen 2009中国农业气象2009,30,1:5
6ConfDTree: A Statistical Method for Improving Decision Trees显示文摘Decision trees have three main disadvantages: reduced performance when the training set is small; rigid decision criteria; and the fact that a single 'uncharacteristic' attribute might 'derail' the classification process. In this paper we present ConfDTree(Confidence-Based Decision Tree) — a post-processing method that enables decision trees to better classify outlier instances. This method, which can be applied to any decision tree algorithm, uses easy-to-implement statistical methods(confidence intervals and two-proportion tests) in order to identify hard-to-classify instances and to propose alternative routes. The experimental study indicates that the proposed post-processing method consistently and significantly improves the predictive performance of decision trees, particularly for small, imbalanced or multi-class datasets in which an average improvement of 5%~9% in the AUC performance is reported.Gilad Katz Asaf Shabtai Lior Rokach Nir Ofek 2014Journal of Computer Science & Technology2014,29,3:3
7Global dimming: a review of the evidence for a widespread and significant reduction in global radiation with discussion of its probable causes and possible agricultural consequences显示文摘Gerald Stanhill Shabtai Cohen 2001Agricultural and Forest Meteorology2001,,4:2
8Continuous etlaanolp roduction by immobilized yeast reactor coupled with membrane pervaporation unit 显示文摘SHABTAI Y CHAIMOVITZ S FREEMAN A 1991Biotechnol Bioeng1991,38,:1
9Securing Android-powered mobile devices using SELinux显示文摘Shabtai A Fledel Y Elovici Y 2010IEEE Security & Privacy2010,8,3:1
10A survey of scheduling with controllable processing times显示文摘SHABTAY D STEINER 2007Discrete appl Math2007,155,13:1
11A survey of scheduling with controllable processing times显示文摘SHABTAY D STEINER G 2007Discrete Applied Mathematics2007,155,13:1
12The single-machine earliness-tardiness scheduling problem with due date assignment and resource-dependent processing times显示文摘SHABTAY D STEINER G 2008Ann Oper Res2008,159,1:1
13Modulated fatty acid desaturation via overexpression of two distinct omega-3 desaturases differentially alters tolerance to various abiotic stresses in transgenic tobacco cells and plants显示文摘Zhang M Barg R Yin M G Gueta-Dahan Y Leikin-Frenkel A Salts Y Shabtai S B 0,,:1
14A survey of scheduling with controllable processing times 显示文摘Shabtay D Steiner G 2007Discrete Applied Mathematics2007,155,13:1
15A bicriteria approach to scheduling a single machine with job rejection and positional penalties显示文摘Shabtay 0 Gaspar N Yedidsion L 2012Journal of Combinatorial Optimization2012,23,4:1
16Two due date assignment problems in scheduling a single machine显示文摘SHABTAY D STEINER G 2006Oper Res Lett2006,34,6:1
17'Andromaly':a behavioral malware detection framework for Android devices显示文摘SHABTAI A KANONOV U ELOVICI Y 2012Journal of Intelligent Information Systems2012,38,1:1
18A survey of scheduling with control- lable processing times显示文摘Shabtay D Steiner G 2007Discrete Applied Mathematics2007,155,:1
19Production and composition of the sulphated cell wall polysaccharide of Porphyridium(Rhodophyta) as affected by CO2 concentration显示文摘Li S Y Shabtai Y Arad S 2000Phycologia2000,39,4:1
20Glucose Oxidase Electrodes via Reconstitution of the Apo-enzyme: Tailoring of Novel Glucose Biosensors显示文摘KARZ E SHABTAI V H WILLNER B BUCKMANN A F 1999Anal Chim Acta1999,385,:1
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