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In-stent restenosis is one of the main causes of postoperative complications after percutaneous coronary intervention and a challenge in the field of intervention.Sodium-glucose cotransporter 2 inhibitors (SGLT2i) are new oral hypoglycemic agents used in the treatment of diabetes in recent years. In addition to lowering bloodglucose, they also have the effects of lowering blood pressure, improving blood lipids, and reducing weight, thereby protecting cardiovascular function. Recent studies have shown that SGLT2i can reduced the occurrence of in-stent restenosis and significantly improved the prognosis of patients with coronary heart disease receiving interventional therapy.This article reviews the clinical studies and mechanisms of SGLT2i in the prevention of restenosis after percutaneous coronary intervention, providing new ideas for improving the clinical prognosis of patients with coronary heart disease. [ABSTRACT FROM AUTHOR]

Accurate tourism flow forecasting has always been the most important issues in the scenic spots. Due to various influences, tourism flow forecasting reveals not only a rather complex nonlinear characteristics but also seasonal trend, particularly during tourism peak periods. This article presents a tourism flow forecasting model that combines the seasonal support vector regression model with particle swarm optimization algorithm (SSVR-PSO), to forecast tourism flow. Finally, the new monthly data sets from a famous 5A scenic spot Mount Huangshan during 2008-2011 are simulated repeatedly. Empirical results demonstrate that a SSVR-PSO approach is an effective way to forecast tourism flow, outperforming SVR-PSO, SVR-GA, BPNN and ARIMA. [ABSTRACT FROM AUTHOR]

It is one debating point between traditional and behavioral financial theories why momentum effect persists in most financial markets. In view of Chinese stock markets' features, this paper constructs "relative price" momentum portfolios based on "anchoring bias" and "disposition effect" in behavioral financial theories, and explores the relationship among these new momentums and classical momentums. The results show after controlling the classical momentum effect and systematic risk factors, the relative price momentum effect still exists. However, after controlling the relative price momentum effect, the classical momentum effect disappears. If considering transaction costs, investors could not benefit from the momentum strategies. These findings indicate that "anchoring bias" and "disposition effect" are important reasons of momentum effect in Chinese stock markets' features, and high transaction costs hinder the arbitrary. [ABSTRACT FROM AUTHOR]

To ensure the safety of software of speed and position determination system, this paper studied its principle and established a new speed and position determination model; on this basis, it introduced SCADE development method and created the system software model. Additionally, it used the SCADE formal verification technology to validate the safety of the model. Finally, the software was introduced into QNX platform to test. Through the analysis and practice of QNX technology, the result shows that the software completely satisfies the requirement of the technology and safety of speed and position determination system. [ABSTRACT FROM AUTHOR]

Based on the Markowitz M-V theory, an interval quadratic programming model of portfolio selection is proposed with short sales allowed. Approaches have been put forward by applying approaches to compare any two intervals and introducing acceptability degree and possibility degree of interval number. Consequently it converted uncertain quadratic portfolio model into certain quadratic portfolio model to deal with it. In addition, it compared two solutions of the model. [ABSTRACT FROM AUTHOR]