中国科学院机构知识库网格系统: 检索

New models for calculating the electrical resistivity of loess affected by moisture content and NaCl concentration 期刊论文 OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2021, 页码: 15
作者: Duan, Zhao; Yan, Xusheng; Sun, Qiang; Tan, Xuan; Chen, Xin

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收藏 | 浏览/下载：108/0 | 提交时间：2022/01/05

Loess Electrical resistivity Three-phase structure Conductive path Diffuse double layer Theoretical model

Three-Dimensional Analysis of the Natural-Organic-Matter Distribution in the Cake Layer to Precisely Reveal Ultrafiltration Fouling Mechanisms 期刊论文 OAI收割
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2021, 卷号: 55, 期号: 8, 页码: 5442-5452
作者: Wu, Siqi; Hua, Xin; Ma, Baiwen; Fan, Hongwei

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收藏 | 浏览/下载：23/0 | 提交时间：2021/12/23

drinking water treatment ultrafiltration cake-layer structure three-dimensional analysis membrane fouling behavior

Ocean Circulation in the Challenger Deep Derived From Super-Deep Underwater Glider Observation 期刊论文 OAI收割
Geophysical Research Letters, 2021, 卷号: 48, 期号: 13, 页码: e2021GL093169
作者: Jiang HC(江会常); Xu HZ(徐洪周); Vetter Phillip A; Xie Q(谢强); Yu JC(俞建成)

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收藏 | 浏览/下载：23/0 | 提交时间：2021/12/22

Water property in the Challenger Deep has a three-layer structure Westward geostrophic flow dominated the Challenger Deep and its core is shallower in the west Large volume transport of Lower Circumpolar Deep Water (LCDW) about 1.29 Sv passed through the trench area above 7,000 m

原子层沉积工艺制备催化薄膜厚度对生长碳纳米管阵列的影响 期刊论文 OAI收割
JOURNAL OF INORGANIC MATERIALS, 2016, 卷号: 31, 期号: 7, 页码: 681-686
作者: Yang Chao; Li Ying; Yan Lu; Cao Yun-Zhen

收藏 | 浏览/下载：28/0 | 提交时间：2017/02/27

atomic layer deposition iron oxide water-assisted chemical vapor deposition vertically aligned carbon nanotubes controlled structure three-dimensional sample

A Novel Local Regional Model Based on Three-Layer Structure 期刊论文 OAI收割
© Springer International Publishing Switzerland, 2014, 期号: LNBI 8590, 页码: 72-79
作者: Hai Min; Xiao-Feng Wang

收藏 | 浏览/下载：34/0 | 提交时间：2016/01/12

Local Information Level Set Intensity Inhomogeneity Three-layer Structure

Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Wu J.

收藏 | 浏览/下载：52/0 | 提交时间：2013/03/25

This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.

Double inverted pendulum control based on three-loop PID and improved BP neural network (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Digital Manufacturing and Automation, ICDMA 2011, August 5, 2011 - August 7, 2011, Zhangjiajie, Hunan, China
作者: Fan Y.

收藏 | 浏览/下载：50/0 | 提交时间：2013/03/25

To deal with the defects of BP neural networks used in balance control of inverted pendulum such as longer train time and converging in partial minimum this article reaLizes the control of double inverted pendulum with improved BP algorithm of artificial neural networks(ANN) builds up a training model of test simulation and the BP network is 6-10-1 structure. Tansig function is used in hidden layer and PureLin function is used in output layer LM is used in training algorithm. The training data is acquried by three-loop PID algorithm. The model is learned and trained with Matlab calculating software and the simuLink simulation experiment results prove that improved BP algorithm for inverted pendulum control has higher precision better astringency and lower calculation. This algorithm has wide appLication on nonLinear control and robust control field in particular. 2011 IEEE.

Study of unequal error protection method based on JPEG2000 for surveyingmapping image (EI CONFERENCE) 会议论文 OAI收割
International Conference on Computer Science and Software Engineering, CSSE 2008, December 12, 2008 - December 14, 2008, Wuhan, Hubei, China
Yao Q.; Cao M.

收藏 | 浏览/下载：189/0 | 提交时间：2013/03/25

On aviation mapping compression image maybe not decode because of wireless transmission interference. UEP(Unequal Error Protection) scheme is put forward about layer and block structure of JPEG2000 image compression method flexibly enhances local reconfigurable image's quality which is in favor of identifier in the region of interest. 2008 IEEE. and realizes three degrees UEP of data block data header image data via various degrees correction-coding under the condition of obstruct naked and shade. BCH RS and Hamming coding are simulated and image decoding success rate and image's quality are analyzed according to different coding and ROI (Region of Interest) in the Gaussian white noise model and rayleigh fading model. Results shows that the method we putted forward roughly improves decoding success rate at the same time almost not increasing bandwidth

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：33/0 | 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.

The deep internal dynamical processes and new model of continental-continental collision in Himalayan collision orogenic zone 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 1999, 卷号: 42, 期号: 4, 页码: 481-494
作者: Teng, JW; Zhang, ZJ; Wang, GJ; Liu, HB; Hu, JF

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收藏 | 浏览/下载：23/0 | 提交时间：2018/09/26

Himalayan orogens deep internal dynamical processes three dimensional velocity structure transitional belt of collision and compression model of two layer "wedge plates"