Large-scale Mixed Traffic Control Using Dynamic Vehicle Routing and Privacy-Preserving Crowdsourcing

Controlling and coordinating urban traffic flow through robot vehicles is emerging as a novel transportation paradigm for the future. While this approach garners growing attention from researchers and practitioners, effectively managing and coordinating large-scale mixed traffic remains a challenge. We introduce an effective framework for large-scale mixed traffic control via privacy-preserving crowdsourcing and dynamic vehicle routing. Our framework consists of three modules: a privacy-protecting crowdsensing method, a graph propagation-based traffic forecasting method, and a privacy-preserving route selection mechanism. We evaluate our framework using a real-world road network. The results show that our framework accurately forecasts traffic flow, efficiently mitigates network-wide RV shortage issue, and coordinates large-scale mixed traffic. Compared to other baseline methods, our framework not only reduces the RV shortage issue up to 69.4% but also reduces the average waiting time of all vehicles in the network up to 27%.Comment: Accepted to IEEE Internet of Things Journa

Test the arbitrage opportunity by using put-call parity model related to Canadian index option

1 online resource (iii, 70 leaves)Includes abstract and appendices.Includes bibliographical references (leaves 30-32).The main idea of this paper is to test whether there is arbitrage opportunity in Canadian index option market. This paper uses the put-call parity relationship to do the test. In order to make the test more logical, reasonable and close to reality, there are four assumptions made by this paper. The data, which this paper used, is also close to those assumptions. To test the existence of the arbitrage opportunity, 1266 pairs of data are used which include 633 long hedge positions and 633 short hedge positions. AT-test was used to test the existence of the arbitrage opportunities. The paper did the test separately for the long hedge position and short hedge position. The final conclusion of this paper is that, there are no significant arbitrage opportunities in the Canadian option market, but the arbitrage opportunities only really exist for very small probabilities

Влияние докритических деформаций на сдвижение земной поверхности над очистной выработкой

Рассмотрены результаты маркшейдерских измерений горизонтальных смещений реперов наблюдательных станций над очистными выработками шахт Западного Донбасса. Показано, что на значительном удалении от границ мульды имеют место малые деформации, которые в сумме приводят к значительным сдвижениям наблюдаемых точек поверхности. Эти сдвижения достигают 20-30% от максимальных сдвижений в мульде

Highly sensitive label-free colorimetric sensing of nitrite based on etching of gold nanorods

A simple colorimetric method with high sensitivity and selectivity was developed for sensing of nitrite as low as 4.0 mu M by naked eyes, which is based on etching of gold nanorods accompanied by shape changes in aspect ratios (length/width) and a visible color change from bluish green to red and then to colorless with the increase of nitrite

Label free colorimetric sensing of thiocyanate based on inducing aggregation of Tween 20-stabilized gold nanoparticles

Based on inducing the aggregation of gold nanoparticles (AuNPs), a simple colorimetric method with high sensitivity and selectivity was developed for the sensing of thiocyanate (SCN-) in aqueous solutions. Citrate-capped AuNPs were prepared following a classic method and Tween 20 was subsequently added as a stabilizer. With the addition of SCN-, citrate ions on AuNPs surfaces were replaced due to the high affinity between SCN- and Au. As a result, Tween 20 molecules adsorbed on the AuNPs surfaces were separated and the AuNPs aggregated. The process was accompanied by a visible color change from red to blue within 5 min. The sensing of SCN- can therefore be easily achieved by a UV-vis spectrophotometer or even by the naked eye. The potential effects of relevant experimental conditions, including concentration of Tween 20, pH, incubation temperature and time, were evaluated to optimize the method. Under optimized conditions, this method yields excellent sensitivity (LOD = 0.2 mu M or 11.6 ppb) and selectivity toward SCN-. Our attempt may provide a cost-effective, rapid and simple solution to the inspection of SCN- ions in saliva and environmental aqueous samples