Dongqi Wang

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Distributed Denial-of-Service (DDoS) attacks against public web servers are increasingly common. Countering DDoS attacks are becoming ever more challenging with the vast resources and techniques increasingly available to attackers. It is impossible for the victim servers to work on the individual level of ongoing traffic flows. In this paper, we establish(More)
Nitrous oxide (N2O) is one of the main greenhouse gases, which contributes to the global warming and ozone destruction. Sediment cores and river water were collected from an urban and a suburban river for N2O efflux measurement at the sediment-water interface and the factor-controlled incubations to investigating the N2O effluxes under varying conditions of(More)
In this paper we explore the problem of collecting malicious smartphone advertisements. Most smartphone app contains advertisements and also suffers from vulnerable advertisement libraries. Malicious advertisements exploit the ad library vulnerability and attack victim smartphones. Similar to the traditional honeypots, we need an effective way to capture(More)
It is often assumed that intramolecular hydrogen-bonding (H-bonding) exerts a significant influence on the conformational properties of aqueous (bio-)polymers. To discuss this statement, one should, however, distinguish between solvent-exposed and buried H-bonds, and between their respective roles in promoting stability (i.e., as a driving force) and(More)
IP Flow is classified into the Micro-flow and the Macro-flow, which provides a way of selecting proper features used to detect DDoS. Five abstracted features' capabilities of recognizing DDoS are analyzed through experiments. With these features as inputs, a neural network classifier is used to detect DDoS. Experiments' results show that these IP Flow based(More)
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