RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, a...RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, and now it has developed into a kind of biotechnology as well as an important approach in post- genome era. This paper is to summarize the achievements of studies on RNAi tech- nology in basic biology, medicine, pharmacy, botany and other fields.展开更多
First passage time in Markov chains is defined as the first time that a chain passes a specified state or lumped states. This state or lumped states may indicate first passage time of an interesting, rare and amazing ...First passage time in Markov chains is defined as the first time that a chain passes a specified state or lumped states. This state or lumped states may indicate first passage time of an interesting, rare and amazing event. In this study, obtaining distribution of the first passage time relating to lumped states which are constructed by gathering the states through lumping method for a irreducible Markov chain whose state space is finite was deliberated. Thanks to lumping method the chain＇s Markov property has been preserved. Another benefit of lumping method in the way of practice is reduction of the state space thanks to gathering states together. As the obtained first passage distributions are continuous, it may be used in many fields such as reliability and risk analysis展开更多
This paper describes the characteristics of the supply chain e-commerce era, understands the concept,content and objectives of supply chain management,and raises supply chain management model,and also analyzes e-comme...This paper describes the characteristics of the supply chain e-commerce era, understands the concept,content and objectives of supply chain management,and raises supply chain management model,and also analyzes e-commerce supply chain architecture.On the existing architecture,elaborates the build about e-commerce supply chain management system, along with proposing strategic directions of e-commerce supply chain management,including JIT, quick response, efficient customer response, enterprise resource planning and electronic ordering system,and discusses in detail the effects of various policy for the entire e-commerce supply chain management.展开更多
文摘RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, and now it has developed into a kind of biotechnology as well as an important approach in post- genome era. This paper is to summarize the achievements of studies on RNAi tech- nology in basic biology, medicine, pharmacy, botany and other fields.
文摘First passage time in Markov chains is defined as the first time that a chain passes a specified state or lumped states. This state or lumped states may indicate first passage time of an interesting, rare and amazing event. In this study, obtaining distribution of the first passage time relating to lumped states which are constructed by gathering the states through lumping method for a irreducible Markov chain whose state space is finite was deliberated. Thanks to lumping method the chain＇s Markov property has been preserved. Another benefit of lumping method in the way of practice is reduction of the state space thanks to gathering states together. As the obtained first passage distributions are continuous, it may be used in many fields such as reliability and risk analysis
文摘This paper describes the characteristics of the supply chain e-commerce era, understands the concept,content and objectives of supply chain management,and raises supply chain management model,and also analyzes e-commerce supply chain architecture.On the existing architecture,elaborates the build about e-commerce supply chain management system, along with proposing strategic directions of e-commerce supply chain management,including JIT, quick response, efficient customer response, enterprise resource planning and electronic ordering system,and discusses in detail the effects of various policy for the entire e-commerce supply chain management.
