Based on the doctrine theory and cognition theory the system stresses the guidance effect of teaching designs in the system which is educated by the long-range of theory.
系统以建构主义理论、认知理论为依据，强调了教学设计理论在远程教育系统中的指导作用。
2
Therefore it is necessary for us to study the option pricing problem when the stock returns have long-range dependence and momentum effect.
因此我们有必要研究股票收益具有长期依赖性及动量效应时的期权定价问题。
3
The problem whether meteorological station collocating position is suitable has important effect on firing process and result of longrange rocket launcher system.