Abstract Jet pulse assembly is one of the main components of jet hydraulic oscillator.The pressure wave characteristics produced by jet pulse assembly have an Teaset important influence on the performance of the tool.In this paper, the structure and working principle of jet pulse assembly are studied, the mechanical analysis model of piston rod is
We critically re-examine 17 records of fossils currently assigned to the lepidopteran superfamily Bombycoidea, which includes the silk moths, emperor moths and hawk moths.These records include subfossils, compression and impression fossils, permineralizations and ichnofossils.We assess whether observable morphological features warrant their confide
ABSTRACT: Increasingly, fast-growing forest plantations are able to support the wood supply but may simultaneously reduce water availability.The trade-off between wood production and water supply is more evident in areas with low water availability, high seasonal variation, or high water demand from local communities.The management regime adopted i
Unmanned aerial vehicle (UAV) sprayers are widely utilized in commercial aerial application of plant protection products (PPPs) in East Asian countries due to their high flexibility, high efficiency and low cost, but spray drift can lead to low utilization of UAV sprayers application, environmental pollution and bystander exposure risk.Droplet size
Abstract Bacterial blight of rice is a devastating disease caused by the gram-negative bacteria Xanthomonas oryzae pv.oryzae (Xoo).Chinese Xoo strain pathotypes IV, V, and IX are the major virulent Xoo strain types in South China sequentially from the 1990s to the present.Here, we report the isolation of GD0201 and GD0202, which belong to pathotype