The achievement of this paper exists in follows : ( l ) to refer to previous framework on investment structure , study investment structure by regarding west - china as a whole , fill up the academic blank on investment structure in west - china . ( 2 ) to find out the problems on investment gross , structure of main body of investment , industry structure of investment , technical structure of investment , accommodation structure of investment and etc in west - china . to establish counter - measures accordingly . ( 3 ) to advance the suggestions about improving investment structure in west - china , such as " balance development and focus on emphases " , " dynamic adjustment " , " promoting technical progress " and " paying attention to comparative benefits " 本文的研究成果和创新主要在于:参照前人对地区投资结构的研究框架，把西部开发所划定的十二个省级行政区划地理范围作为一个整体来进行这种投资结构的系统性研究，填补了理论界关于西部地区投资结构研究的空白，找出了西部地区在投资总量、投资主体结构、投资技术结构、投资产业结构、投资供给结构等方面存在的问题，并且制定了较为可行的具体措施，最后提出了“均衡发展、重点倾斜气“动态调整” 、 “推动技术进步” 、 “注重比较效益”等四条优化西部地区投资结构的建议。
Though the method is not always to get the best solutions in the whole scope , it can always provide the secondary best solutions within certain range . compared with the traditional location methods , it removes the people factors and ensures the result unification of optimal substation position and optimal network structure . so , it is simple and practical 该方法虽然不一定保证得出全局范围内的最优解，但可以得出一定地理范围内的次最优解，且算法容易实现，同以往传统的选址方法相比较，消除了人为因素，确保了站址和网架的优化，是比较实用的方法。
Regionalism was gradually replaced by globalism during this period , which was manifested by the following changes : geographic scope and commitment of development cooperation has expanded , common strategic goals and policy framework were established , the fields of development cooperation were diversified , and concerted policies at all levels were emphasized 这种变化表现在四个方面：援助地理范围扩大，承诺额增加；拥有统一的战略目标和政策框架；发展合作领域多样化；注重多层次的政策协调。 90年代后，全球主义的发展合作政策占据上风的原因有内外两个方面。
Of course , different technologies will have different constraints on the physical deployment patterns they support - some might be suited to very widespread distribution to support integration over large geographical areas , while others might be more suited to deployment in localized clusters to support high - availability and scalability 毫无疑问，不同的技术对它们所支持的物理部署模式有不同的约束有些可能适合于非常广泛的分布，以支持在很大的地理范围内进行的集成，而其他的可能更适合于部署在本地群集中，以支持高可用性和可伸缩性。
