X-RAY PHASE CONTRAST REVEALS SOFT TISSUE AND SHELL GROWTH LINES IN MOLLUSKS


The Study on a Fighter Against a Medium-range Air-to-air Missile Based on Deep Deterministic Policy Gradient Algorithm

The evasive maneuver strategy for a fighter against a medium-range air-to-air missile Clothing is crucial to improving aircraft survivability.In this paper, the deep deterministic policy gradient algorithm to train the agent to learn the evasive maneuver strategy is studied.The missile-aircraft engagement model parameters are the input states.The a

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Health sector reforms in Central and Eastern Europe

The political and economic transition of the 1990s in the countries of central and eastern Europe has been accompanied by wide ranging health care reform.The initial Soviet model has given way to a variety of forms of health insurance.Yet, as this paper argues, reform has too often been preoccupied with ideological imperatives, such as provider aut

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