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	Conjugated donor-acceptor copolymers from dicyanated naphthalene diimide 期刊论文 OAI收割 TETRAHEDRON, 2014, 卷号: 70, 期号: 36, 页码: 6265-6270 作者: Yang, Liu; Xiao, Chengyi; Jiang, Wei; Wang, Zhaohui \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2019/04/09 Dicyanated Naphthalene Diimides Donor-acceptor Copolymers Stille Coupling Reactions Stronger Electron-acceptors Organic Field-effect Transistors Air-stability
	Influence of high temperature annealing in nitrogen on upconversion luminescence of -NaYF4: Yb3+, Er3+ hexagonal sub-microplates (EI CONFERENCE) 会议论文 OAI收割 2012 International conference on Function Materials and Nanotechnology, FMN 2012, May 19, 2012 - May 20, 2012, Zhengzhou, China 作者: Zhao J. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 The pure -NaYF4: Yb3+ Er3+ hexagonal sub-microplates were successfully prepared by the combination of coprecipitation and hydrothermal methods using sodium citrate as chelator. The size of them is about 600 nm 400 nm (side length thickness). The obtained sample was divided into two parts and one of them was annealed in nitrogen at 300 C for 2 hours. The crystal structure of the -NaYF4: Yb3+ Er3+ hexagonal sub-microplates before and after annealing treatment is hexagonal phase. Under the excitation of 980 nm diode laser the upconversion luminescence intensity the sample after annealing is much stronger than that of the sample without annealing treatment. High temperature annealing process improved the crystallization of the sample resulting in the decrease of the nonradiative relaxation and the enhancement of the upconversion luminescence. (2012) Trans Tech Publications Switzerland.
	Some observations on the size effects in nanotwined metals and their theoretical explanation 会议论文 OAI收割 23rd International Congress of Theoretical and Applied Mechanics, 中国北京/Beijing, China, 2012-08-19 作者: Wei YJ(魏宇杰) 收藏 \| 浏览/下载：14/0 \| 提交时间：2014/04/02 theoretical their explanation effects system suitable amount higher dimensional achieved dimensions deformed novel finding change limited stronger migration exhibit sizes
	The spectral feature analysis of semiconductor thin disk laser (EI CONFERENCE) 会议论文 OAI收割 Optoelectronic Materials and Devices II, November 2, 2007 - November 5, 2007, Wuhan, China 作者: Li J.; Wang L.-J.; Wang L.-J.; Ning Y.-Q.; Li J. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 The semiconductor thin disk laser is a new type of semiconductor laser. This work gives the basic operation function of semiconductor disk laser and analyses the heat effect by the experimentally measured photoluminescence spectrum of the laser chip at different pump power and different temperature. We can see that: with increasing pump power the thermal effects of the gain material becomes seriously and causes the saturation of carrier lifetime so the electron-hole pair created in the absorbtion layer have no enough time to rate to one of the wells and the non-radiative recombination happens in the barrier. When the thermal effects becomes stronger the chip will not lasing. This phenomenon is from the smaller energy offset between barrier and quantum well. We optimize the original structure design and experimental technology. A non-absorbing AlGaAs layer who is transparent to the pumping and laser wavelength is added to confine the carriers in the quantum wells. At the same time a DBR with double reflecting band is induced to improve the absorbing efficiency of the pumping light. The single QW is replaced by the three narrow QWs This three QWs structure can add the quantum state of QW increase the recombination probability of carriers in the QWs and reduce the heat effect. The chemical etch equipment is also improved to control the surface unevenness to be within 50 nm.
	Upconversion luminescence properties of Y2O3:Yb 3+, Er3+ nanostructures (EI CONFERENCE) 会议论文 OAI收割作者: Cui Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 Cubic Y2O3 nanostructures doped with Yb3+ and Er3+ ions were synthesized by a facile hydrothermal method. Three distinct shapes such as nanotubes nanospheres and nanoflakes formed in the products by adjusting the pH value of reacting solution. Powder X-ray diffraction analyses indicate that all the three nanostructures are pure cubic phase while electron microscopy measurements confirm the formation of different morphologies. These nanostructures exhibit strong visible upconversion luminescence under the excitation of a 978-nm diode laser. In Yb3+- and Er3+- codoped Y2O3 nanocrystals the relative intensity of green emission became stronger as the size and morphology of sample changed from tubes to flakes. 2006 Elsevier B.V. All rights reserved.
	MECHANO-BIOLOGICAL RESPONSES OF ROS 17/2.8 CELLS TO DIFFERENT ORIENTATIONS OF CULTURE SUBSTRATE 会议论文 OAI收割中国力学学会学术大会'2005, 中国北京, 2005-08-01 作者: Long M(龙勉) 收藏 \| 浏览/下载：18/0 \| 提交时间：2015/09/10 gravitational gravity stronger respond inverted vimentin tress lowest
	Calculation of penalties in algorithm of mixed integer programming solving with revised dual simplex method for bounded variables 期刊论文 OAI收割 JOURNAL OF COMPUTATIONAL MATHEMATICS, 1999, 卷号: 17, 期号: 5, 页码: 8,545-552 Wei, YM; Hu, QH 收藏 \| 浏览/下载：16/0 \| 提交时间：2012/11/12 penalties stronger penalties the revised dual simplex method for bounded variables