During the outbreak of COVID-19, China adopted nationwide measures such as lockdown and restricting social activity, so that the epidemic was quickly controlled.With the epicenter trans-ferred to overseas, the pressure of seat back imported cases in China was increasing, prevent the coronavirus from re-entering the country to cause a new epidemic h
A wide range of additive manufacturing (AM) processing conditions can be rapidly realized within a single specimen via high-speed direct energy deposition laser based (DED-LB), due to a variety of cooling conditions and in-situ powder mixing.Since existing approaches are inefficient in exploring the vast material and process design space in AM, hig
Experiments on copula duration Speakers indicate that the nature of mate competition and sperm storage in the large thistle aphid, Uroleucon cirsii (L.), differs from that in the well-studied yellow dung fly, Scatophaga stercoraria (L.).Unlike the situation in the dung fly, second copulas are shorter on average than first copulas for both individua
While virtual reality(VR) technology enhances learning, it also BC020 places new demands on medical learning evaluation.Verifying the occurrence of learning is a primary issue.To design and implement practical and feasible VR-based learning evaluation based on the immersive learning evaluation framework, the Substitution-Augmentation-Modification-R
The Executive Regulations of Article 219 of the Direct Taxes Law is one of the most important executive regulations of this Law, which explains how the tax organization interacts with taxpayers and how the officers perform their duties.The results of this research, which had carried out descriptively and analytically, indicate that the mentioned re