检索结果-南通市图书馆

预合成尖晶石和原位尖晶石浇注料的性能与应用

在线全文

学校读者我要写书评

暂无评论

预合成尖晶石和原位尖晶石浇注料的性能与应用

2011全国不定形耐火材料学术会议

作者：龙斌 marion schnabel Andreas Buhr Reinhard Exenberger Christian Rampitsch 安迈铝业(青岛)有限公司

讨论了刚玉-尖晶石（预合成尖晶石）和刚玉-镁砂（原位尖晶石）浇注料的区别,以及不同配方形式对浇注料物理性能所产生的影响。根据钢包衬里不同区域对耐火材料的要求,讨论了两种材料的适用性及性能差异。

关键词：预合成尖晶石原位尖晶石浇注料

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

合成尖晶石和原位尖晶石的机制与实践

合成尖晶石和原位尖晶石的机制与实践

Categories and Weak Equivalences of Graded Algebras

2011年耐火原料学术交流会

作者：刘新彧 marion schnabel Andreas Buhr Reinhard Exenberger Christian Rampitsch 安迈铝业(青岛)有限公司

该文章论述了刚玉-尖晶石（尖晶石质）和铝镁浇注料（原位尖晶石）浇注料的特点和机制以及不同配方形式对其物理性能所产生的影响。根据钢包衬里不同区域对内衬耐火材料的要求,讨论了两种材料的适用性和性能差异。

关键词：合成尖晶石原位尖晶石浇注料

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Algebra Colloquium 2019年第4期26卷 643-664页

作者： Alexey Gordienko Ofir schnabel James Zhang Department of Higher Mathematics Moscow State Technical University of Civil Aviation Kronshtadtsky Boulevardd.20125993 MoscowRussia Department of Mathematics ORT Braude College2161002 KarmiclIsrael 不详

In the study of the structure of graded algebras(such as graded ideals,graded subspaces,and radicals)or graded polynomial identities,the grading group can be replaced by any other group that realizes the same *** we come to the notion of weak equivalence of gradings:two gradings are weakly equivalent if there exists an isomorphism between the graded algebras that maps each graded component onto a graded *** group grading on an algebra can be weakly equivalent to G-gradings for many different groups G;however,it turns out that there is one distinguished group among them,called the universal group of the *** this paper we study categories and functors related to the notion of weak equivalence of *** particular,we introduce an oplax 2-functor that assigns to each grading its support,and show that the universal grading group functor has neither left nor right adjoint.

关键词： algebra grading adjoint functor oplax 2-functor (co)limit

Crustal Structure across the Northwestern Margin of South China Sea:Evidence for Magma-poor Rifting from a Wide-angle Seismic Profile

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2012年第4期86卷 854-866页

作者： DING Weiwei Michael schnabel Dieter FRANKE RUAN Aiguo WU Zhenli The Second Institute of Oceanography State Oceanic Administration Federal Institute for Geoscience and Natural Resource(BGR)

We present results from a 484 km wide-angle seismic profilie acquired in the northwest part of the South China Sea （SCS） during OBS2006 cruise. The line that runs along a previously acquired multi-channel seismic line （SO49-18） crosses the continental slope of the northern margin, the Northwest Subbasin （NWSB） of the South China Sea, the Zhongsha Massif and partly the oceanic basin of the South China Sea. Seismic sections recorded on 13 ocean-bottom seismometers were used to identify refracted phases from the crustal layer and also reflected phases from the crust-mantle boundary （Moho）. Inversion of the traveltimes using a simple start model reveals crustal images in the study area. The velocity model shows that crustal thickness below the continental slope is between 14 and 23 kin. The continental part of the line is characterized by gentle landward mantle uplift and an abrupt oeeanward one. The velocities in the lower crust do not exceed 6.9 km/s. With the new data we can exclude a high-velocity lower crustal body （velocities above 7.0 kin/s） at the location of the line. We conclude that this part of the South China Sea margin developed by a magma-poor rifting. Both, the NWSB and the Southwest Sub-basin （SWSB） reveal velocities typical for oceanic crust with crustal thickness between 5 and 7 kin. The Zhongsha Massif in between is extremely stretched with only 6-10 km continental crust left. Crustal velocity is below 6.5 kin/s; possibly indicating the absence of the lower crust. Multi-channel seismic profile shows that the Yitongansha Uplift in the slope area and the Zhongsha Massif are only mildly deformed. We considered them as rigid continent blocks which acted as rift shoulders of the main rift subsequently resulting in the formation of the Northwest Sub-basin. The extension was mainly accommodated by a ductile lower crustal flows, which might have been extremely attenuated and flow into the oceanic basin during the spreading stage. We compared the crustal stru

关键词： P-wave velocity model magma-poor rifting lower crust flow South China Sea

Comparison of Cox Model Methods in A Low-dimensional Setting with Few Events

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2016年第4期14卷 235-243页

作者： Francisco M. Ojeda Christian Miiller Daniela Bornigen David-Alexandre Tregouet Arne Schillert Matthias Heinig Tanja Zeller Renate B. schnabel Department of General and Interventional Cardiology University Heart Center Hamburg-Eppendorf 20246 Hamburg Germany German Center for Cardiovascular Research (DZHK) Hamburg |Kiel| Luebeck Germany Sorbonne Universites University Pierre et Marie Curie Paris 06 Institut National pour la Sante et la Recherche Medicale (INSERM) Unite Mixte de Recherche en Sante (UMR_S) 1166 F-75013 Paris France Institute for Cardiometaholism and Nutrition (ICAN) F-75013 Paris France Institut fur Medizinische Biometrie und Statistik Universitat zu Lubeck Universitatsklinikum Schleswig-Holstein Campus Lubeck 23562 Lubeck Germany Institute of Computational Biology German Research Center for Environmental Health Helmholtz Zentrum Munchen 85764 Neuherberg Germany

Prognostic models based on survival data frequently make use of the Cox proportional hazards model. Developing reliable Cox models with few events relative to the number of predictors can be challenging, even in low-dimensional datasets, with a much larger number of observations than variables. In such a setting we examined the performance of methods used to estimate a Cox model, including （i） full model using all available predictors and estimated by standard techniques, （ii） backward elimination （BE）, （iii） ridge regression, （iv） least absolute shrinkage and selection operator （lasso）, and （v） elastic net. Based on a prospective cohort of patients with manifest coronary artery disease （CAD）, we performed a simulation study to compare the predictive accuracy, calibration, and discrimination of these approaches, Candidate predictors for incident cardiovascular events we used included clinical variables, biomarkers, and a selection of genetic variants associated with CAD. The penalized methods, i.e., ridge, lasso, and elastic net, showed a comparable performance, in terms of predictive accuracy, calibration, and discrimination, and outperformed BE and the full model. Excessive shrinkage was observed in some cases for the penalized methods, mostly on the simulation scenarios having the lowest ratio of a number of events to the number of variables. We conclude that in similar settings, these three penalized methods can be used interchangeably. The full model and backward elimination are not recommended in rare event scenarios.

关键词： Proportional hazards regression Penalized regression Events per variable Coronary artery disease

Quantum expander for gravitational-wave observatories

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2019年第1期8卷 62-69页

作者： Mikhail Korobko Yiqiu Ma Yanbei Chen Roman schnabel Institut für Laserphysik und Zentrum fur Optische Quantentechnologien Universitat HamburgLuruper Chaussee 14922761 HamburgGermany Theoretical Astrophysics 350-17 California Institute of TechnologyPasadenaCA 91125USA

The quantum uncertainty of laser light limits the sensitivity of gravitational-wave *** the past 30 years,techniques for squeezing the quantum uncertainty,as well as for enhancing gravitational-wave signals with optical resonators have been ***,however,have finite linewidths,and the high signal frequencies that are produced during the highly scientifically interesting ring-down of astrophysical compact-binary mergers still cannot be ***,we propose a purely optical approach for expanding the detection *** uses quantum uncertainty squeezing inside one of the optical resonators,compensating for the finite resonators’linewidths while keeping the low-frequency sensitivity *** quantum expander is intended to enhance the sensitivity of future gravitational-wave detectors,and we suggest the use of this new tool in other cavity-enhanced metrological experiments.

关键词： wave quantum unchanged

Analysis of a Simple Probe for <i>In-Situ</i>Resistivity Measurements

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2017年第1期9卷 1-10页

作者： Jens Munk Todd Petersen Matt Cullin William schnabel Department of Electrical Engineering University of Alaska Anchorage Anchorage AK USA Department of Mechanical Engineering University of Alaska Anchorage Anchorage AK USA University of Alaska Fairbanks Fairbanks AK USA

We present a probe factor for a simple measurement device, which can be used to determine in-situ electrical resistivity in soils or other penetrable bodies. The probe is primarily sensitive to the material immediately surrounding it and therefore is ideal for determining localized conductivities. The geometry of the probe can be scaled to effectively adjust the region of interest. The calibration, or “probe factor” is a function of the geometry, as well as the electrode configuration. Results are presented assuming a Wenner array configuration, however they can easily be extended to other geometries, such as the Schlumberger or dipole-dipole array.

关键词： Electrical Resistivity Measurements Soil Moisture Electrical Conductivity Geophysical Measurement

Models for the estimation of probable intake of flavouring substances

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Models for the estimation of probable intake of flavouring s...

第三届中国香料香精高层论坛

作者： Dr. Jürgen schnabel Head Global Regulatory and Scientific Affairs Givaudan Flavours

＜正＞～～

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

桃褐腐病菌抗药性分子机理研究进展

植物保护 2010年第5期36卷 28-32页

作者：尹良芬胡勐郡金鑫 Guido schnabel 罗朝喜华中农业大学植物科技学院武汉430070 湖北省作物病害监测和安全控制重点实验室武汉430070 Clemson University Dept. of ESPS Clemson 29634 USA

桃褐腐病是严重危害桃生产的重要病害之一。在实际生产中,该病害的控制主要以化学防治为主。由于杀菌剂的大量使用,桃褐腐病菌已对几类常用的杀菌剂产生了不同程度的抗药性。本文就桃褐腐病菌(Moniliniaspp.)对生产上使用的几大类杀菌... 详细信息

桃褐腐病是严重危害桃生产的重要病害之一。在实际生产中,该病害的控制主要以化学防治为主。由于杀菌剂的大量使用,桃褐腐病菌已对几类常用的杀菌剂产生了不同程度的抗药性。本文就桃褐腐病菌(Moniliniaspp.)对生产上使用的几大类杀菌剂的抗药性情况及抗药性分子机制研究进展进行简单概述和分析,以供国内同行借鉴与参考。

关键词：桃褐腐病杀菌剂抗药性分子机理