中国科学院机构知识库网格系统: 检索

Unusual patterns of hybridization involving two alpine Salvia species: Absence of both F-1 and backcrossed hybrids 期刊论文 OAI收割
FRONTIERS IN PLANT SCIENCE, 2022, 卷号: 13, 页码: 1010577
作者: Chang, Yuhang; Zhao, Shengxuan; Xiao, Hanwen; Liu, Detuan; Huang, Yanbo

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hybridization Salvia RAD-seq speciation reproductive isolation barriers ethological isolation REPRODUCTIVE ISOLATION POLLINATION BIOLOGY STAMINAL EVOLUTION YUNNAN INTROGRESSION ERICACEAE LAMIACEAE BARRIERS ORIGINS F(1)S

The natural hybridization between species Ligularia nelumbifolia and Cremanthodium stenoglossum (Senecioneae, Asteraceae) suggests underdeveloped reproductive isolation and ambiguous intergeneric boundary 期刊论文 OAI收割
AOB PLANTS, 2021, 卷号: 13, 期号: 2, 页码: plab012
作者: Hu,Li; Yang,Rui; Wang,Yue-Hua; Gong,Xun

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Cremanthodium ddRAD-seq F(1)s Ligularia natural hybridization HYBRID SPECIATION YUNNAN INTROGRESSION DISPLACEMENT RADIATION VELLEREA PATTERNS PROGRAM STACKS

基于二噻吩并咔唑与苯并噻二唑的 D-A 型共轭聚合物的合成与表征 学位论文 OAI收割
硕士, 中国科学院长春应用化学研究所: 中国科学院研究生院, 2015
作者: 荣梓清

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由于给体片段（D）和受体片段（A）间的电荷转移 D-A型共轭高分子通常具有较小的光学带隙且分子偶极矩较大分子间相互作用较强利于获得高的载流子迁移率因此 D-A型共轭聚合物是有机太阳能电池材料领域的研究热点。另一方面稠环分子由于具有刚性平面的构型重组能小等优点而被广泛引入D-A型共轭聚合物体系中。因此本文以二噻吩并[2 3-b:7 6-b]咔唑（C1）和二噻吩并[3 2-b:6 7-b]咔唑（C2）两个稠环单元作为给体片段苯并噻二唑（BT）单元作为受体片段合成了一系列D-A型共轭聚合物并且对它们的光物理性质电化学性质载流子传输和光伏特性进行了系统研究主要成果和创新点如下：（1）合成了基于二噻吩并咔唑和烷氧基取代的BT单元的两个聚合物P(BT-C1)和P(BT-C2) 它们均是无定形聚合物。尽管P(BT-C1)和P(BT-C2)在分子结构上只有硫原子位置不同的差别但两者在长波长和短波长范围表现出完全相反的相对吸收强度。通过理论模拟可以发现两个聚合物骨架构象完全不同 P(BT-C1)的骨架较为弯曲而P(BT-C2)的骨架线性较好。因此基于P(BT-C2)的有机薄膜晶体管（OTFT）的迁移率较高达到5.4×10-3 cm2V-1s-1 而P(BT-C1)的OTFT迁移率较低为1.9×10-3 cm2V-1s-1。 P(BT-C2)的HOMO能级比P(BT-C1)深0.2 eV左右因此基于P(BT-C2)的体异质结有机太阳能电池（OSC）器件的开路电压（Voc）明显高于P(BT-C1) 而P(BT-C1)与PC71BM共混薄膜相分离更加明显导致P(BT-C1)的OSC器件的短路电流密度（Jsc）和填充因子（FF）较高两个聚合物的能量转换效率（PCE）相差不多均在5%左右。（2）以C2为给体单元 BT和二氟代BT为受体单元合成了两个共轭聚合物P(C6BT-C2)和P(C6BT2F-C2)。与P(BT-C2)相比 P(C6BT-C2)具有较高的热稳定性 HOMO能级升高光谱红移。在BT单元上引入F原子后聚合物的HOMO能级由P(C6BT-C2)的-5.00 eV降低到P(C6BT2F-C2)的-5.20 eV 同时帯隙变窄。理论模拟发现两者的分子平面性比P(BT-C2)有很大改善但分子骨架构象较为弯曲。基于P(C6BT-C2)与P(C6BT2F-C2)的OTFT器件在150 oC退火后载流子迁移率分别为4.8×10-3 和4.9×10-3 cm2V-1s-1 。由于与PC71BM共混薄膜的相分离不明显基于P(C6BT-C2)与P(C6BT2F-C2)的OSC器件的Jsc和FF较低 PCE均小于2%。

Evidence for natural hybridization between Primula beesiana and P. bulleyana, two heterostylous primroses in NW Yunnan, China 期刊论文 OAI收割
JOURNAL OF SYSTEMATICS AND EVOLUTION, 2014, 卷号: 52, 期号: 4, 页码: 500-507
作者: Ma, Yong-Peng; Tian, Xiao-Ling; Zhang, Jing-Li; Wu, Zhi-Kun; Sun, Wei-Bang

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natural hybridization P. beesiana P. bulleyana pollinator behavior reproductive success synthetic F(1)s

The skp1-like protein ssk1 is required for cross-pollen compatibility in s-rnase-based self-incompatibility 期刊论文 iSwitch采集
Plant journal, 2010, 卷号: 62, 期号: 1, 页码: 52-63
作者: Zhao, Lan; Huang, Jian; Zhao, Zhonghua; Li, Qun; Sims, Thomas L.

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Ssk1 S-locus f-box protein S-rnase Self-incompatibility Cross-pollen compatibility Petunia

A digital image processing system based on DSP (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Information Engineering and Computer Science, ICIECS 2010, December 25, 2010 - December 26, 2010, Wuhan, China
作者: Liu Y.; He X.; Liu Y.; Liu Y.

收藏 | 浏览/下载：9/0 | 提交时间：2013/03/25

In order to detect the target position real-timely a real time target detecting system based on tms320F2812 DSP and Spartan3-SC3S400 FPGA is designed. The design hardware structure a target detecting method and software char flow of FPGA and DSP are presented. The system is tested by a 1Kx1K image the processing time is 1.3ms experiments results show that the method is feasible the simple design and stable correct results make this method very ascendant in practical application. 2010 IEEE.

Noise processing technology of a TDICCD sensor (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Zhang L.-P.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

In the application of TDI-CCD the other is all kinds of interference noise produced in the working process of a TDI-CCD for reset noise because of its serious noise interference such as reset noise and 1 / f noise correlated double sampling is employed. The experimental results show that after noise processing the imaging quality is reduced etc. According to the features of noise the output S/N has been raised to about 50 dB. 2010 IEEE. so that it is necessary to study the noise characteristics of TDI-CCD. There are two categories of noise this paper has studied the corresponding noise-processing technology. For dark current noise one is the inherent noise refrigeration is taken including shot noise dark current noise fixed pattern noise and transfer noise etc.

一种定量海水中石莼属海藻显微阶段总个体数的方法 专利 OAI收割
专利类型: 发明, 专利号: CN200910016223.6, 申请日期: 2009-12-02, 公开日期: 2009-12-02
逄少军; 刘峰; 单体锋; 徐娜; 张玉荣; 高素芹; 张志怀

收藏 | 浏览/下载：25/0 | 提交时间：2014/08/04

1.一种定量海水中石莼属海藻显微阶段总个体数的方法 2)培养条件 3)统计其特征在于：1)预处理将加入f/2营养盐的海水在温度为15-20℃ 经培养后即可以确定每升海水中石莼属海藻总的个体数量。样品海水用100目的纱绢网过滤光强为50-100μmol photons m-2s-1 1L过滤后的海水样品中加入500μL饱和二氧化锗水溶液光周期为12h白天:12h黑夜条件下充气(空气)培养而后加入f/2营养盐(母液A和B各1mL)充气培养培养7天后更换1L新鲜的f/2培养液以后每5天换一次培养液培养3-4周待用

Mechanisms of energy transfer in Pr3+ and Cr3+ codoped SrAl12O19 phosphor (EI CONFERENCE) 会议论文 OAI收割
209th ECS Meeting, May 7, 2006 - May 12, 2006, Denver, CO, United states
作者: Zhang J.; Wang X.-J.; Zhang G.; Zhang G.; Zhang G.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

A two-step energy transfer was observed in Pr3+ and Cr 3+ codoped SrAl12O19 phosphor which results in a two-photon luminescence for one UV/vacuum-UV photon absorbed. For one Pr 3+ ion excited to the lowest 4f5d states two Cr3+ ions may be excited and emit two red photons due to 2E- 4A2 transitions of the Cr3+ ions Cr 3+ ions can be excited into the 4T1(F) levels by cross relaxation of Pr3+ 1S0- 1I6 or by direct energy transfer from Pr3+ 3P0 1 states. The mechanisms of the two-step energy transfer process were studied based on spectra and lifetime measurements. copyright The Electrochemical Society.

Vaccum ultraviolet excited luminescence of Pr3+ ions at different temperatures 期刊论文 OAI收割
CHINESE JOURNAL OF INORGANIC CHEMISTRY, 2007, 卷号: 23, 期号: 6, 页码: 1103-1106
作者: You, FT; Huang, SH; Wang, DW; Qi, SQ; Zhang, GB

收藏 | 浏览/下载：25/0 | 提交时间：2016/06/29

Pr3+ 4f5d states S-1(0) state thermal equilibrium