Financing guarantee institutions achieve capital preservation and appreciation through investment, diversify business risks by purchasing re-guarantee. In order to study the optimal investment re-guarantee purchase strategies of financing institutions, geometric Brownian motion modulated Markov chain modulation is selected describe price process risk assets, Hamilton-Jacobi-Bellman equation con...

One of the core challenges facing the Internet today is the problem of ensuring privacy for its users. It is believed that mechanisms such as anonymity and pseudonymity are essential building blocks in formulating solutions to address these challenges and considerable eeort has been devoted towards realizing these primitives in practice. The focus of this eeort, however, has mostly been on hidi...

for any organization sound marketing strategy and quality assurance play vital role in the growth of the organization. the price, quality and service, service centers, friendly attitude, discounts on sales, esthetics, store location and appearance, ease of operations, guarantees and warranties, adopting new ideas, and flexible payments terms were considered to study the perceptions of the respo...