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It has been pointed out by the New Curriculum that geography courses based on modern information technology should be constructed and information resources and technology measures must be used positively to optimize and enrich the geography instruction. It is not only an innovation of teaching methods to bring the multimedia and network into the field of geography instruction, but also radical influence...
From the systemic point of view, strategic network is a complex system. Based on niche theory in ecology, this paper proposes the concept of niche of enterprise node in strategic network, and tries to research into the measuring model for the breadth and overlap of node niche in strategic network This research shows that strategic network node not only has to choose appropriate niche, but also make...
A kind of new genetic algorithm (GA) is presented, that calculates a way to satisfy the control demand of the metro bogie comprehensive test terrace electro-hydraulic servo system. We adopt the GA to carry out the evolution operation for the unit. Adopting the phase margin is the function of penalty that we use to calculate the adaptive degree. We consider the index sign of time domain and robustness...
Acinetobacter calcoaceticus RAG-1 was cultured on different chain length saturated 2-hydroxyl fatty acid (2-HOFA) carbon sources as follows: C12:0 (2-OH), C14:0 (2-OH), C16:0 (2-OH) and C18:0 (2-OH). These 2-HOFAs were used as either sole carbon sources or cosubstrates with C14:0 (total 1% w/v) to form new emulsans (EMs) having controlled side chain FA structure and, therefore, unique emulsifier...
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