①asslgn to subscrIption变成了subscribe／assign()，timed out变成了timed out／unjock……。作者可能是为了更丰富地说明状态机图中转换的用法。状态机图描述对象的一组属性值，当发生指定事件时，对该事件做出的相同性质的反应，...①asslgn to subscrIption变成了subscribe／assign()，timed out变成了timed out／unjock……。作者可能是为了更丰富地说明状态机图中转换的用法。状态机图描述对象的一组属性值，当发生指定事件时，对该事件做出的相同性质的反应，它既不是从系统的全局结构研究对象，也不反映系统对外提供的某种价值(用例)，而是一个对象随时间变化穿行各个状态之间的轨迹,展开更多
We successfully perform the three-dimensional tracking in a turbulent fluid flow of small axisymmetrical particles that are neutrally-buoyant and bottom-heavy,i.e.,they have a non-homogeneous mass distribu-tion along ...We successfully perform the three-dimensional tracking in a turbulent fluid flow of small axisymmetrical particles that are neutrally-buoyant and bottom-heavy,i.e.,they have a non-homogeneous mass distribu-tion along their symmetry axis.We experimentally show how a tiny mass inhomogeneity can affect the particle orientation along the preferred vertical direction and modify its tumbling rate.The experiment is complemented by a series of simulations based on realistic Navier-Stokes turbulence and on a point-like particle model that is capable to explore the full range of parameter space characterized by the gravi-tational torque stability number and by the particle aspect ratio.We propose a theoretical perturbative prediction valid in the high bottom-heaviness regime that agrees well with the observed preferential ori-entation and tumbling rate of the particles.We also show that the heavy-tail shape of the probability distribution function of the tumbling rate is weakly affected by the bottom-heaviness of the particles.展开更多
又有消息说Visual Studio 2005．Team System的正式发布也许要等到2006了。微软要靠Team System深入到应用生命周期管理这个领域中．所以谨慎行事可以理解。三年前，这个领域的主要伙伴Rational被竞争对手IBM收购以后，微软就要自己走...又有消息说Visual Studio 2005．Team System的正式发布也许要等到2006了。微软要靠Team System深入到应用生命周期管理这个领域中．所以谨慎行事可以理解。三年前，这个领域的主要伙伴Rational被竞争对手IBM收购以后，微软就要自己走一条非UML的道路。展开更多
8月15日，SD Times发表了BZ Re search针对UML使用情况的调查结果，结论是UML已经成为主流，但不同团队之间的使用情况差异很大。超过2／3的开发经理说UML已经在本组织中使用，大约20％的经理说UML在本组织所有项目中使用。为什么使用UM...8月15日，SD Times发表了BZ Re search针对UML使用情况的调查结果，结论是UML已经成为主流，但不同团队之间的使用情况差异很大。超过2／3的开发经理说UML已经在本组织中使用，大约20％的经理说UML在本组织所有项目中使用。为什么使用UML?69％的人从10个选项中选择了“UML改善了项目团队内部的沟通”。针对新的UML2．0。展开更多
文摘①asslgn to subscrIption变成了subscribe／assign()，timed out变成了timed out／unjock……。作者可能是为了更丰富地说明状态机图中转换的用法。状态机图描述对象的一组属性值，当发生指定事件时，对该事件做出的相同性质的反应，它既不是从系统的全局结构研究对象，也不反映系统对外提供的某种价值(用例)，而是一个对象随时间变化穿行各个状态之间的轨迹,
基金The authors are grateful to Japanese WDC-C2 KY0T0 AE index service for presenting AU,AL and AE indices and to Goddard Space Flight Center,NASA for presenting data of the interpanaetary condition and auroradata.Thanks are also given to Cluster and Double-Star Data Center for providing data used in the study.This work was supported by the National Natural Science Foundation of China(Grant No.40390152)the State Key Basic Research Program(Grant No.G200000784)the XK100010404 of Beijing City,and the Space Weather Laboratory,Center for Space Science and Applied Research,CAS.
基金supported by the National Natural Science Foundation of China (Grant 11988102)
文摘We successfully perform the three-dimensional tracking in a turbulent fluid flow of small axisymmetrical particles that are neutrally-buoyant and bottom-heavy,i.e.,they have a non-homogeneous mass distribu-tion along their symmetry axis.We experimentally show how a tiny mass inhomogeneity can affect the particle orientation along the preferred vertical direction and modify its tumbling rate.The experiment is complemented by a series of simulations based on realistic Navier-Stokes turbulence and on a point-like particle model that is capable to explore the full range of parameter space characterized by the gravi-tational torque stability number and by the particle aspect ratio.We propose a theoretical perturbative prediction valid in the high bottom-heaviness regime that agrees well with the observed preferential ori-entation and tumbling rate of the particles.We also show that the heavy-tail shape of the probability distribution function of the tumbling rate is weakly affected by the bottom-heaviness of the particles.
文摘8月15日，SD Times发表了BZ Re search针对UML使用情况的调查结果，结论是UML已经成为主流，但不同团队之间的使用情况差异很大。超过2／3的开发经理说UML已经在本组织中使用，大约20％的经理说UML在本组织所有项目中使用。为什么使用UML?69％的人从10个选项中选择了“UML改善了项目团队内部的沟通”。针对新的UML2．0。
