Jianqiang Xu

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In this essay, I mainly discuss how to price and hedge options in stochastic volatility (SV) models. The market is incomplete in the SV model, whereas it is complete in the Black-Scholes model. Thus the option pricing and hedging methods are a little different for the SV model and for the Black-Scholes model. The no-arbitrage argument and the risk-neutral(More)
BACKGROUND The efficacy of benzimidazole fungicides is often limited by resistance, and this is the case with the use of carbendazim for controlling Fusarium head blight caused by Gibberella zeae (Schwein.) Petch (anamorph Fusarium graminearum). Recent studies have shown that carbendazim resistance in field strains of G. zeae is associated with mutations in(More)
Designing a robust visual tracker is a challenging problem due to many disturbed factors such as illumination changes, appearance changes, rotation, partial or full occlusions, etc. Among numerous existed trackers, correlation filter based tracker is a fast and robust method with resistance to the above-mentioned factors. Motivated by that, spatio-temporal(More)
To solve the challenging problem of face recognition under varying illumination conditions, we propose in this paper a novel LBP operator which we refer to as Local Binary Patterns with Circle Threshold (CT-LBP) operator. The CT-LBP operator can keep more discriminating information than the original LBP operator without losing the simplicity and effectivity(More)
BACKGROUND There has been no consensus on the optimal treatment of symptomatic sacral perineural cysts. Most previous reports concerning the management methods were either sporadic case reports or a series of limited cases. This study is to further optimize the management for patients with symptomatic sacral perineural cysts by analyzing the outcomes of a(More)
Stratospheric ozone depletion has caused an increase in the amount of ultraviolet-B (UV-B) radiation reaching the earth's surface. Numerous investigations have demonstrated that the effect of UV-B enhancements on plants includes reduction in grain yield, alteration in species competition, susceptibility to disease and changes in plant structure and(More)
This article mentioned an integral projection algorithm basing on narrowing region, and this algorithm can focus face characters from video picture sequence, so it supplies precision guarantee for face pose estimate. This article realized face pose estimate based on face ellipse circle and feature points. The basic thought is that establish the mapping(More)
Pneumonia is one of the most serious diseases for children, with which lung microbiota are proved to be associated. We performed 16S rDNA analysis on broncho-alveolar lavage fluid (BALF) for 32 children with tracheomalacia (C group), pneumonia infected with Streptococcus pneumoniae (S. pneumoniae) (D1 group) or Mycoplasma pneumoniae (M. pneumoniae) (D2(More)
License plate recognition can be widely used in traffic direction of Olympic Games, traffic management, and so on. Because the picture of license plate is complex, the character segmentation error is a main cause of decrease of license plate recognition rate. Research on denoising and character segmentation algorithm is crucial in the license plate(More)
With the microprocessor as its core, the license plate automatic recognition system is a highly intelligent electronic system based on technologies such as image processing and pattern recognition. This paper focuses on the preprocessing before license plate recognition after locating the license plate. This paper comprehensively utilizes kinds of image(More)