检索结果-南通市图书馆

2000年

作者： (美)彼得·杜拉克(Peter F.drucker) 孙忠译

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巨星四重奏——披头士与四大满贯

网球天地 2009年第9期 46-49页

作者： Joel drucker 黑木（编译）

从一个披头士狂的角度解读大满贯，你会发现惊人的相似性，音乐界和网球圈的四大巨星都卓尔不群于他者，且独具一格于另三人。

关键词：大满贯四重奏相似性网球

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领导者,为你的决策负责

CO.公司 2004年第8期 18-19页

作者： Peter F.drucker 晓君

最好的管理者首先是那些知道如何为自己的决策负责任的人。

关键词：企业领导经营决策责任意识人格魅力领导能力执行力企业管理

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numerical investigation into the influence of the punch shape on the mechanical behavior of pharmaceutical powders during compaction

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Particuology 2014年第5期12卷 116-131页

作者： Alexander Krok Marin Peciar Roman Fekete Slovak University of Technology in Bratislava Faculty of Mechanical EngineeringBratislavaSlovak Republic

During the production of pharmaceutical tablets using powder compaction, certain common problems can occur, such as sticking, tearing, cutting, and lamination. In the past, the compressibility of the powder was calculated only along the axis of the device; consequently, critical areas of the material throughout the volume could not be identified. Therefore, finite element method （FEM） can be used to predict these defects in conjunction with the use of an appropriate constitutive model. This article summarizes the current research in the field of powder compaction, describes the drucker-Prager Cap model calibration procedure and its implementation in FEM, and also examines the mechanical behavior of powder during compaction. In addition, the mechanical behavior of pharmaceutical powders in relation to changes in friction at the wall of the system is examined, and the dependence of lubrication effect on the geometry of the compaction space is also investigated. The influence of friction on the compaction process for the flat-face, fiat-face radius edge, and standard convex tablets is examined while highlighting how the effects of friction change depending on the shape of these tablets.

关键词： Powder Die compaction FEM

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养老金革命

COMMUnITY AnALYSIS OF AGGREGATED BACTERIA In SOUTHERn LAKE BAIKAL

2019年

作者： (美)彼得·德鲁克

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水生生物学报 2006年第6期30卷 718-720页

作者： Ahn T.S. Kim O.S. Spiglazov L.P drucker V.V Kangwon national University Chunchon 200-701 Korea Limnological Institute Russian Academy of Science Irkutsk 664033 Russia

[KG(0.01mm]This study focuses on the community structure of aggregated bacteria in Lake Baikal and relationships with free-living bacteria. Fluorescent in situ hybridization (FISH) methods were used in samples of bacteria taken in April, 2001. Bacterial counts of free-living bacteria by DAPI staining ranged from 0.2×10 6 to 3.2×10 6 cells·mL -1, decreasing with depth, whereas aggregated bacterial numbers dramatically increased with depth, ranging from 0.4×10 4 to 3.3×10 4 cells·mL -1. Ratios of EUB probe binding cells to DAPI counts ranged from 52.3 to 74.1% in free-living bacteria and from 39.6 to 66.7% in aggregated bacteria, respectively. Community composition of aggregated bacteria was very different from free-living bacteria, especially at 25m depth where highest phytoplankton numbers were observed. The vertical profile of aggregated bacteria community was very characteristic. Beta-Proteobacteria increased with depth down to 100m. At 250m, gamma-Proteobacteria was 44% of DAPI bound cells, while other groups were less than 1%. We conclude that community structures of free-living and aggregated bacteria were different, and they may sustain the ecosystem in independent ways.

关键词： Bacterial aggregates Community structure FISH Lake Baikal

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多层增透膜的最佳设计参数

红外技术 1981年第1期 56-64页

作者： K.Rabinovitch ,M.drucker ,刘球

本文证明有两个部分反射层和一个间隔层的、应用于多层增透膜的Fabry—Perot干涉滤光片模型,有两个可用于最佳设计的自由参数。一个参数是关于等反射率圆的辐角,此反射率圆在由部分反射器的收接率实数部分和虚数部分构成的复平面上;另... 详细信息

本文证明有两个部分反射层和一个间隔层的、应用于多层增透膜的Fabry—Perot干涉滤光片模型,有两个可用于最佳设计的自由参数。一个参数是关于等反射率圆的辐角,此反射率圆在由部分反射器的收接率实数部分和虚数部分构成的复平面上;另一个参数是Fabry-Perot模型中的间隔层的光学厚度。本文介绍最佳设计方法及其应用,给出典型的例子予以讨论。

关键词：反射率反射比率反射层地层最佳设计最优设计多层增透膜光学厚度间隔层设计参数