Improving the voltage window of aqueous supercapacitors beyond 2.5 volts without diminishing their capacitance performance is a big challenge to achieve excellent energy density because of the undesirable water decomposition. Herein, this study developed a novel vanadium phosphate (VPO) of the...

This paper utilizes a unique database to investigate how trading activity affects risk-neutral-skewness (RNS), and how risk attitude affects the return predictability of RNS in China SSE 50ETF option market. We find that the individual investors’ option trading activities play a dominant role...

This paper utilizes a unique database to investigate how trading activity affects risk-neutral-skewness (RNS), and how risk attitude affects the return predictability of RNS in China SSE 50ETF option market. We find that the individual investors’ option trading activities play a dominant role...

The paper investigates costs and benefits of hiring a star CEO. Using a sample of Chinese listed firms between 2000 and 2010, we find that the appointment of a star CEO is associated with significantly positive cumulative abnormal returns surrounding the announcement day. These findings remain...

We present an improved SPFA algorithm for the single source shortest path problem. For a random graph, the empirical average time complexity is O(|E|), where |E| is the number of edges of the input network. SPFA maintains a queue of candidate vertices and add a vertex to the queue only if that...