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您的检索式：关键字=Colony structure
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| 1 | A STUDY ON CRYSTAL STRUCTURE AND ANTITUMOR ACTIVITY OF 3, 6-DICHLOROFLUORAN显示文摘In stead of fluorescein dibenzene-sulfonate, the title compound (I)was accidentally obtained through the reaction of fluorescein with benzene sulfonyl chloride. The crystal | 王流芳 任艳平 王奇光 何凤英 王淇 金大年 张培琰 | 1989 | Chinese Science Bulletin1989，34，21： | 0 |
| 2 | Simulating the Folding Pathway of RNA Secondary Structure Using the Modified Ant Colony Algorithm显示文摘A new method for simulating the folding pathway of RNA secondary structure using the modified ant colony algorithmis proposed.For a given RNA sequence,the set of all possible stems is obtained and the energy of each stem iscalculated and stored at the initial stage.Furthermore,a more realistic formula is used to compute the energy ofmulti-branch loop in the following iteration.Then a folding pathway is simulated,including such processes as constructionof the heuristic information,the rule of initializing the pheromone,the mechanism of choosing the initial andnext stem and the strategy of updating the pheromone between two different stems.Finally by testing RNA sequences withknown secondary structures from the public databases,we analyze the experimental data to select appropriate values forparameters.The measure indexes show that our procedure is more consistent with phylogenetically proven structures thansoftware RNAstructure sometimes and more effective than the standard Genetic Algorithm. | Jun Yu~(1,2),Changhai Zhang~(1,2),Yuanning Liu~(1,2),Xin Li~(1,2) 1.College of Computer Science and Technology,Jilin University,Changchun 130012,P.R.China 2.Key Laboratory of Symbolic Computation and Knowledge Engineering (Ministry of Education,China) Jilin University,Changchun 130012,P.R.China | 2010 | Journal of Bionic Engineering2010，7，4： | 0 |
| 3 | Improvement of proof-ultimate strength difference in laser additive manufactured Ti-6Al-2V-1.5Mo-0.5Zr-0.3Si alloy by tuning basketweave structure显示文摘After annealed at 1000 ℃, a special basket-weave structure is obtained in laser additive manufactured Ti-6Al-2V-1.5Mo- 0.5Zr-0.3Si alloy. The unit of the special basket-weave structure is a lamellas clusters, which consist of lamellar primary ot (otp), crab-like structures at the edges of otp and lamellar secondary a (as) on both sides of otp. As the units of basket-weave structures, the width of the clusters is much larger than that of a lamellas in as-deposited alloy. The formation temperature and process of the special basket-weave structure are studied, and the room temperature properties are tested and compared with the as-deposited alloy. The results show that the formation of the special basket-weave structure finishes within about 30 s and crab-like structures form earlier than lamellar as. The yield strength of the alloy is decreased by about 75 MPa compared to that of the as-deposited alloy. Besides, the proof-ultimate strength difference of the alloy is two times higher than that of the as-deposited alloy with about 34% improvement for the impact toughness. It is because ot colony size shows a positive correlation to the width of the unit forming basket-weave structure. The enhancement in proof-ultimate strengthdifference could significantly improve the toughness of the alloy, and thus effectively increase the safety of the alloy. | Guo-chao Li Xu Cheng Hua-ming Wang | 2019 | Journal of Iron and Steel Research(International)2019，26，6： | 0 |
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