Abstract Unremitting head and neck pain (UHNP) is a commonly encountered phenomenon in Headache Medicine and may be seen in the setting of many well-defined headache types.The prevalence of UHNP is not clear, and establishing the presence of UHNP may require careful questioning at repeated patient visits.The cause of UHNP in some patients may be co

Abstract During the unconventional hydrocarbon development, the irregular shaping and uneven sand concentration of proppants banks in the staged multi-cluster fracturing of horizontal wells are key factors determining the fracture conductivity and post-fractured well productivity.To compensate for the limitation of small-scale sand filled core cond

To understand animal wellbeing, we need to consider subjective phenomena and sentience.This is challenging, since these properties are private and cannot be observed directly.Certain motivations, emotions and related internal states can be inferred in animals through experiments that involve choice, learning, generalization and decision-making.Yet,

Crowd systems play an important role in virtual environment applications, such as those used in entertainment, education, training, and different simulation systems.Performance and scalability are key factors, and it is desirable for crowds to be simulated with as few resources as possible while providing variety and realism for agents.This paper f

Based on the meshing theory of ZC1 worm gear pair,the tooth surface contact parameters are analyzed by using MATLAB.The results show that the axial module,center distance,lead angle,radius of arc tooth profile of grinding wheel have great influence on tooth surface contact parameters.In general,the center distance is selected Credit card holder in