1 Active Disturbance Rejection Control(ADRC):a brief survey Since its inception,Active Disturbance Rejection Control(ADRC)has re-centered feedback controller design around two fundamental ideas—along with a consequen...1 Active Disturbance Rejection Control(ADRC):a brief survey Since its inception,Active Disturbance Rejection Control(ADRC)has re-centered feedback controller design around two fundamental ideas—along with a consequential design simplification:real-time estimation and online cancellation of the“total disturbance”conceived as the lumped effect of unknown internal dynamics and external inputs.The simplified design then proceeds in a customary fashion for the ideally remaining system model,which is devoid of the total disturbance.展开更多
Wetlands are important features of the landscape with a high intrinsic value from geological,hydrological,hydrogeological,ecological and social points of view;this last point is related to the services they provide to...Wetlands are important features of the landscape with a high intrinsic value from geological,hydrological,hydrogeological,ecological and social points of view;this last point is related to the services they provide to mankind.If in the past wetlands were subjected to destructive actions,putting them at risk of degradation and further reduction,currently they are the subject of preferential protection in many countries as a consequence of the recognition of their intrinsic value.展开更多
Coastal aquifers have played a major role in modern human occupation and economic development in Iberoamerica.Most of Iberoamerica population inhabits coastal areas,and water needs are frequently fulfilled with ground...Coastal aquifers have played a major role in modern human occupation and economic development in Iberoamerica.Most of Iberoamerica population inhabits coastal areas,and water needs are frequently fulfilled with groundwater.Possible climate changes and consequent sea level rise will deeply affect coastal aquifers,putting considerable pressure in those water bodies.展开更多
Pterosaur bones are for the first time reported from the Tremp Syncline （Spain） and the southern Pyrenees. They come from the Torrebilles-2 site （Isona, Lleida Province） in the upper Maastrichtian part of the Trem...Pterosaur bones are for the first time reported from the Tremp Syncline （Spain） and the southern Pyrenees. They come from the Torrebilles-2 site （Isona, Lleida Province） in the upper Maastrichtian part of the Tremp Formation, which falls within the C29r magnetochron. Fragmentary long bones are referred to the Pterosauria based on their cortical thinness, micro-architecture, and histological features. They belong to very large to possibly giant individuals. The most complete specimen is possibly a partial right femur. The review of the Maastrichtian pterosaur record shows that only a few specimens can be referred to the C29r （which contains the K/Pg boundary）. The identification of fragmentary remains could improve our knowledge about the abundance and distribution of these flying sauropsids just before the end-Cretaceous mass extinction.展开更多
文摘1 Active Disturbance Rejection Control(ADRC):a brief survey Since its inception,Active Disturbance Rejection Control(ADRC)has re-centered feedback controller design around two fundamental ideas—along with a consequential design simplification:real-time estimation and online cancellation of the“total disturbance”conceived as the lumped effect of unknown internal dynamics and external inputs.The simplified design then proceeds in a customary fashion for the ideally remaining system model,which is devoid of the total disturbance.
文摘Wetlands are important features of the landscape with a high intrinsic value from geological,hydrological,hydrogeological,ecological and social points of view;this last point is related to the services they provide to mankind.If in the past wetlands were subjected to destructive actions,putting them at risk of degradation and further reduction,currently they are the subject of preferential protection in many countries as a consequence of the recognition of their intrinsic value.
基金IGCP 519 UNESCO project for financial support to the working group.
文摘Coastal aquifers have played a major role in modern human occupation and economic development in Iberoamerica.Most of Iberoamerica population inhabits coastal areas,and water needs are frequently fulfilled with groundwater.Possible climate changes and consequent sea level rise will deeply affect coastal aquifers,putting considerable pressure in those water bodies.
基金supported by Ministerio de Ciencia e Innovación of the Spanish government (CGL2008-06533C03-01/02)the Departament de Cultura de la Generalitat de Catalunya
文摘Pterosaur bones are for the first time reported from the Tremp Syncline （Spain） and the southern Pyrenees. They come from the Torrebilles-2 site （Isona, Lleida Province） in the upper Maastrichtian part of the Tremp Formation, which falls within the C29r magnetochron. Fragmentary long bones are referred to the Pterosauria based on their cortical thinness, micro-architecture, and histological features. They belong to very large to possibly giant individuals. The most complete specimen is possibly a partial right femur. The review of the Maastrichtian pterosaur record shows that only a few specimens can be referred to the C29r （which contains the K/Pg boundary）. The identification of fragmentary remains could improve our knowledge about the abundance and distribution of these flying sauropsids just before the end-Cretaceous mass extinction.
