Abstract Expansion of oceanic anoxia is a prevailing hypothesis for driving the marine end-Permian mass extinction and is mainly based on isotopic geochemical proxies.However, socks long-term oceanic redox conditions before the end-Permian mass extinction remain unresolved.Here we report a secular redox trend based on rock magnetic experiments and
We present an approach to program reasoning which inserts between a program and its verification conditions an additional layer, the denotation of the program expressed in a declarative form.The program is first translated into its denotation from which subsequently the verification conditions are generated.However, even before (and independently o
The stress path characteristics of surrounding rock in the formation of gob were analyzed and the unloading was solved.Taking Chengchao Iron Mine as the engineering background, the model for analyzing the instability of deep gob was established based on the mechanism of stress relief in deep mining.The energy evolution law was analyzed by introduci
Uninhabited islands have an important role in supporting the socio-economic and ecological development in Zhoushan City.To promote the refined management and Kratom sustainability for uninhabited islands, this paper analyzed the underlying problems of the utilization and conservation in Zhoushan City, and proposed the principles of categorized prot
Biped robot has become more general purpose in our live Moisturizing Cream as general behavioral patterns.It can walk very similar to human walking pattern.Therefore, many robots have been researched and developed in recent years.Through this paper a planner biped robot is modeled for specific task.This paper tries to explore the potential of using