As an effective method,
heteroatom doping is widely used to improve
the electrochemical performance of carbon materials. However, the
influence of oxygen-containing functional groups in carbon materials
is often neglected. Therefore, we use buckwheat hulls as the precursor
to prepare oxygen-doped hard carbon by simple carbonization. The buckwheat
hull at a pyrolysis temperature of 1100 °C has the highest reversible
capacity of 400 mA h g–1 at 50 mA g–1, and the capacity can maintain 96% of the initial capacity after
3000 cycles at 2A g–1. These results confirm that
the natural pore structure and proper interlayer spacing of the BPC-1100
contribute to the transport and insertion of sodium ions. In addition,
the first principle proves that the role of oxygen atoms cannot be
ignored in the storage of sodium ions. In particular, the improvement
of the CO bond is helpful to improve the adsorption capacity
of hard carbon to sodium ions and enhance the reversible capacitance.
We describe a new approach, called Strider, to Change and Configuration Management and Support (CCMS). Strider is a black-box approach: without relying on specifications, it uses state differencing to identify potential causes of differing program behaviors, uses state tracing to identify actual, run-time state dependencies, and uses statistical behavior modeling for noise filtering. Strider is a state-based approach: instead of linking vague, high-level descriptions and symptoms to relevant actions, it models management and support problems in terms of individual, named pieces of low-level configuration state and provides precise mappings to user-friendly information through a computer genomics database. We use troubleshooting of configuration failures to demonstrate that the Strider approach reduces problem complexity by several orders of magnitude, making root cause analysis possible.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.