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| 1 | Cold expansion technology of connection holes in aircraft structures:A review and prospect显示文摘As one kind of key anti-fatigue manufacture approaches with simplicity and effectiveness, the hole cold expansion technology satisfies the increasing needs for light weight and durability of aircraft structures.It can improve the fatigue life by several times at no additional weight conditions.The hole cold expansion technology has been widely used in manufacturing and repairing of both fighters and commercial aircraft, and has become a research hotspot in the strengthening technology.In recent years, hole cold expansion process methods, residual stress around expanded holes, the behavior of fatigue crack initiation and propagation, and fatigue lives after cold expansion are researched extensively through lots of experiments and finite element simulations.A review on the hole cold expansion technology research status in the last twenty years is presented in this paper.Via the analysis of the current characteristics and defects of the hole cold expansion technology, combined with the actual needs in design and manufacture of new-generation aircraft, development trends and novel research directions are presented for realizing precise and high-efficiency anti-fatigue manufacture. | Fu Yucan Ge Ende Su Honghua Xu Jiuhua Li Renzheng | 2015 | Chinese Journal of Aeronautics2015，28，4： | 31 |
| 2 | Temporal lobe epilepsy: bilateral hippocampal metabolite changes revealed at proton MR spectroscopic imaging显示文摘 | Ende GE Laxer KD Knowlton RC | 1997 | Radiology1997，202，3： | 1 |
| 3 | Temporal lobe epilepsy: bilateral hippocampal metabolite changes revealed at proton MR spectrose opic imaging 显示文摘 | Ende GE Laxer KD Knowlton RC | 1997 | Radiology1997，202，3： | 1 |
| 4 | Temporal lobe epilepsy: bilateral hippocampal metabolite changes revealed at proton MR spectroscopic imaging显示文摘 | Ende GE Laxer KD Knowhon RC | 1997 | Radiology1997，202，3： | 1 |
| 5 | Fast filtering false active subspaces for efficient high dimensional similarity processing显示文摘The query space of a similarity query is usually narrowed down by pruning inactive query subspaces which contain no query results and keeping active query subspaces which may contain objects corre-sponding to the request. However,some active query subspaces may contain no query results at all,those are called false active query subspaces. It is obvious that the performance of query processing degrades in the presence of false active query subspaces. Our experiments show that this problem becomes seriously when the data are high dimensional and the number of accesses to false active sub-spaces increases as the dimensionality increases. In order to solve this problem,this paper proposes a space mapping approach to reducing such unnecessary accesses. A given query space can be re-fined by filtering within its mapped space. To do so,a mapping strategy called maxgap is proposed to improve the efficiency of the refinement processing. Based on the mapping strategy,an index structure called MS-tree and algorithms of query processing are presented in this paper. Finally,the performance of MS-tree is compared with that of other competitors in terms of range queries on a real data set. | WANG GuoRen YU Ge, XIN JunChang ZHAO YuHai ZHANG EnDe | 2009 | Science in China(Series F)2009，52，2： | 0 |
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