中国科学院机构知识库网格系统: 检索

Stabilizing G-quadruplex DNA by methylazacalix[n] pyridine through shape-complementary interaction 期刊论文 OAI收割
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, 2016, 卷号: 26, 期号: 2, 页码: 609-612
作者: Guan, Ai-Jiao; Shen, Meng-Jie; Zhang, En-Xuan; Li, Qian; Wang, Li-Xia

收藏 | 浏览/下载：22/0 | 提交时间：2016/03/14

G-quadruplexes Stabilize Circular dichroism Methylazacalix[n] pyridine Molecular docking

Spanwise stretching and collapse motions stabilize leading-edge vortex in slow-flying bats 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: Wang SZ(王士召); He GW(何国威); Zhang X(张星)

收藏 | 浏览/下载：25/0 | 提交时间：2014/04/02

stretching stabilize flying leading collapse vortex oscillating stable slowing still simulate observed morphology around motion where taken method study

Robust trajectory tracking control of autonomous quad-rotor UAV based on double loop frame (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Materials, Mechatronics and Automation, ICMMA 2011, January 15, 2011 - January 16, 2011, Melbourne, VIC, Australia
作者: Sun Q.

收藏 | 浏览/下载：24/0 | 提交时间：2013/03/25

This paper deals with the under-actuated characteristic of a quad-rotor unmanned aerial vehicle (UAV). By designing the double loop configuration the autonomous trajectory tracking is realized. The model uncertainty external disturbance and the senor noise are also taken into consideration. Then the H controller is put forward in the inner loop. An optimal stability augmentation control (SAC) method is used to stabilize the horizon position and keep it away from oscillation. By calculating the nonlinear decouple map control quantity is converted to the speeds of the four rotors. At last some simulation results and the prototype implementation prove that the control method is effective.

An efficient and reusable silica/dendrimer supported platinum catalyst for electron transfer reactions 期刊论文 OAI收割
Journal of Colloid and Interface Science, 2011, 卷号: 353, 期号: 1, 页码: 149-155
H. F. Li; J. A. Lu; Z. L. Zheng; R. Cao

收藏 | 浏览/下载：48/0 | 提交时间：2012/06/06

Pt nanoparticle Stabilize Catalyze Electron transfer mesoporous sba-15 silica colloidal solution nanoparticle catalysts shape dendrimers hydrogenation nanocatalysis nanocrystals copolymer triblock

Feed-forward control to stabilize optical axis based on accelerometer (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
Wenfeng B.; Juan C.; Hu W.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

In the optoelectronic tracking system the azimuth and elevation system determine the pointing precision of the optical axis. We discuss how to stabilize the optical axis by apply the feed forward control based on the accelerometer output. Both the acceleration and speed are applied to the compound controller. The experimental results show that when the azimuth servo system works at maximum speed 50/s and maximum accelerate 30/s2 the maximum tracking error of the system is 1.08' with the feed forward compensation so the precision is increased 6 times compared to that of without compound control. 2010 IEEE.

Parallel estimation of translation for video stabilization (EI CONFERENCE) 会议论文 OAI收割
2010 6th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2010, September 23, 2010 - September 25, 2010, Chengdu, China
作者: Wang H.; Liu G.; Wang H.; Wang H.; Wang H.

收藏 | 浏览/下载：97/0 | 提交时间：2013/03/25

Translation motion estimation is the major aspect of video motion compensation especially in two-dimensional turntable. This paper presents a robust parallel estimation algorithm of translation in video stabilization system. The equivalent model of translation that derived is accorded with small rotation angle comparatively. A parallel algorithm based on grey mapping is used in local motion estimation to shorten the estimation time and improve the computation efficiency. After local motion vectors are calculated a fast filter can detect the spurious vectors avoiding possible jerks. The suggested translation estimation algorithm has been implemented on NVIDIA GTX 260 the experimental results show that the average time of the estimation and compensation finished in 16 ms/frame and stabilize 1k1k pixels sequence gray video up to 60 frames/s. 2010 IEEE.

Polyethylenimine effectively induces, stabilizes, and regulates intramolecular G-quadruplexes 期刊论文 OAI收割
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, 2009, 卷号: 19, 期号: 16, 页码: 4669-4672
作者: Sun, Hongxia; Zhou, Qiuju; Xiang, Junfeng; Tang, Yalin

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收藏 | 浏览/下载：9/0 | 提交时间：2019/04/09

G-quadruplex Condensation Polymer Induce Stabilize Regulate

The analysis and design of low velocity estimation based on observer (EI CONFERENCE) 会议论文 OAI收割
2009 IEEE International Conference on Automation and Logistics, ICAL 2009, August 5, 2009 - August 7, 2009, Shenyang, China
作者: Wang D.; Zhang S.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Low velocity servo system needs precision velocity estimation. An observer for low velocity estimation was proposed in this paper. First the source of low velocity estimation errors and the shortcomings of the single period difference were analyzed. The relationship between the estimation accuracy and estimator's frequency characteristics was concluded. Then the structure of the observer was proposed. Frequency characteristics were used to design the compensator which can stabilize the observer. The stability of the observer was also discussed. At last the observer's estimation accuracy was evaluated through a quantitative comparison. The results of simulation and experiment have shown that the quantized error in velocity estimation decreases dramatically when a velocity observer is used. Compared with some commonly-used estimators the phase lag accompanying the observer is much less. 2009 IEEE.

Composite-structure frequency selective surface with tripole elements (EI CONFERENCE) 会议论文 OAI收割
8th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2008, November 2, 2008 - November 5, 2008, Kunming, China
作者: Gao J.

收藏 | 浏览/下载：72/0 | 提交时间：2013/03/25

Two composite symmetry structure is proposed in this paper. Based on the integral equation method the frequency response with large incident angle effect is analyzed. As a result of the numerical analysis it is shown that the composite symmetry structure with single FSS screen is efficient to stabilize the drift of FSS resonant frequency with the steering of incident angle though transmission loss increased. Especially the structure that the FSS is embedded centrally in the dielectrics has better frequency characteristic with flat top and sharp skirts. The studies have indicated the versatility of the proposed structure. 2008 IEEE.

Restoration of moving blurred image based on TMS320C6416 (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者: Liu W.

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

To absolve image blur caused by camera's high speed fixed-point DSP TMS320C6416 and wiener filtering algorithm are adopted to stabilize image. On the premise that cameras have uniform motion restoration model for moving blurred image was researched the principle of Wiener filtering is explained the key technologies of moving blurred image restoration with TMS320C6416 are introduced: how to complete FFT calculation of 32bit and how to exert DMA function of DSP to enhance processing speed ring effect and ghost effect in restored image are explained and how the parameter of wiener filter affects ring effect and ghost effect is discussed in addition to this other reasons of ring effect and ghost effect are analyzed detailed. Experiments shows that One TMS320C6416 chip can restore seven frames per second there is great hope to realize real-time restoration if adopting multi-DSP or the FFT completion by hardware.