Dynamic Correlation in Driven Vortex Phases

We describe transport experiments where the spatial gradient of the driving Lorentz force is controlled. The velocity profiles induced by the Lorentz force gradient in the driven liquid and lattice vortex phases are characteristic of hydrodynamic, plastic, and elastic motion.     

Challenges in developing an integrated catchment management model

Directives and policies increasingly call for more integrated management of land and water. Frameworks such as integrated catchment management may address these calls, and yet their implementation requires decisions to be taken under conditions of extreme complexity and uncertainty. This paper summarises a participatory framework through which decision‐makers, experts and system modellers can collaboratively develop an integrated model to support such decisions. A feasibility study showed the potential of the framework. An operational version of the model, able to analyse the effects of 50 management options on 20 indicators, is estimated to require in the order of 225 man‐months from system modellers, alongside substantial inputs from stakeholders. The significant technical challenges confronting such an exercise may be overshadowed by the institutional challenges, including the fundamental question of whether organisations are truly committed. However, the reward for overcoming such challenges is the opportunity to achieve genuine improvements in the social, economic and environmental quality of our catchments.     

寻求精确且可靠的振动感测适用于以状态为基础的预知维护

精密的工业制程对于马达与相关机械有效而且一致性运作的依赖日益提高.在机械中的失衡、缺陷、松散、以及其它异常现象通常都会转换成振动,而接着就是失去精密度与安全性的考虑.假如不加以处理的话,除了性能与安全的问题之外,当设备需要脱机修理时,生产力的损失将会变得无可避免.