机构

• 长春光学精密机械与物... [4]
• 成都山地灾害与环境研... [3]
• 大连化学物理研究所 [1]
• 生态环境研究中心 [1]
• 兰州化学物理研究所 [1]

采集方式

• OAI收割 [10]

内容类型

• 会议论文 [7]
• 期刊论文 [3]

发表日期

• 2020 [2]
• 2016 [2]
• 2013 [1]
• 2012 [3]
• 2009 [1]
• 2006 [1]
• 更多

学科主题

• 物理化学与绿色催化 [1]

筛选

浏览/检索结果: 共10条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Revisiting the forms of trace elements in biogeochemical cycling: Analytical needs and challenges 期刊论文  OAI收割 TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2020, 卷号: 129, 页码: 1-8 作者:  Liu, Lihong;  Yin, Yongguang;  Hu, Ligang;  He, Bin;  Shi, Jianbo   |  收藏  |  浏览/下载：191/0  |  提交时间：2021/09/14 Trace elements  Speciation analysis  Element forms at different dimension  Nanoparticles  Macromolecular complexes   Fractal geometry of aggregates in natural grassland soils with different restoration stages 会议论文  OAI收割 Chengdu, October 11, 2012 - October 15, 2012 作者:  Zhou, Ping;  Wen, Anbang;  Zhuang, Wenhua;  Liu, Guobin   |  收藏  |  浏览/下载：404/0  |  提交时间：2018/10/19 erosion environment  soil micro-aggregates  fractal dimension  different restoration stage   Fabrication of Cu-Doped CeO2 Catalysts with Different Dimension Pore Structures for CO Catalytic Oxidation 期刊论文  OAI收割 CATALYSIS SURVEYS FROM ASIA, 2016, 卷号: 20, 期号: 4, 页码: 231-240 作者:  Tang, Zhicheng;  Wang, Yi;  Su, Yunfei;  Dai, Lingfeng;  Zhang, Qingwen   |  收藏  |  浏览/下载：159/0  |  提交时间：2019/06/20 Different Dimension  Co Catalytic Oxidation  Nanocasting Route  Cu-doped Ceo2 Catalyst   Fabrication of Cu-Doped CeO2 Catalysts with Different Dimension Pore Structures for CO Catalytic Oxidation 期刊论文  OAI收割 Catalysis Surveys from Asia, 2016, 卷号: 20, 期号: 4, 页码: 231-240 作者:  Yunfei Su;  Lingfeng Dai;  Qingwen Zhang;  YunZhen Li;  JiaXi Peng 收藏  |  浏览/下载：22/0  |  提交时间：2016/12/02 Different dimension  CO catalytic oxidation  Nanocasting route  Cu-doped CeO2 catalyst   Structural amelioration of 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012, October 12, 2012 - October 14, 2012, Jilin, China 作者:  Liu Y.;  Liu Y. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 920 nm optically pumped semiconductor vertical external-cavity surface emitting laser (OPS-VECSEL) has an important application in laser display. We constructed and optimized a 920 nm OPS-VECSEL with active region of In0.09Ga0.91As quantum well (QW) system pumped by 808 nm laser diode module. By the finite element method  self-consistent solutions of the semiconductor electronic and optical equations are realized to calculate the characteristics parameters of OPS-VECSEL. The performances of device especially the mode  the threshold and the optical-optical translation efficiency were analyzed by dealing with different number of QWs (1  2 and 3) in one period  QW depth  barrier width  the component and dimension of the non-absorption layer. We chose an improved structure of them. On this basis  we ameliorated the number of QW periods and the simulation showed that in order to obtain high performance device  the choice of the number of QW periods must be cautious. (2013) Trans Tech Publications  Switzerland.   Fractal Geometry of Aggregates in Natural Grassland Soils with Different Restoration Stages 会议论文  OAI收割 Symposium on Erosion and Sediment Yields in the Changing Environment, 四川成都, 2012-10-11~15 作者:  Zhou P;  WEN ANBANG;  ZHUANG WENHUA;  LIU GUOBIN 收藏  |  浏览/下载：39/0  |  提交时间：2012/12/14 erosion environment  soil micro-aggregates  fractal dimension  different restoration stage   Image coding using wavelet-based compressive sampling (EI CONFERENCE) 会议论文  OAI收割 2012 5th International Symposium on Computational Intelligence and Design, ISCID 2012, October 28, 2012 - October 29, 2012, Hangzhou, China 作者:  Li J.;  Li J.;  Li J. 收藏  |  浏览/下载：43/0  |  提交时间：2013/03/25 In this paper  we proposed a novel coding scheme is proposed using wavelet-based CS framework for nature image. First  two-dimension discrete wavelet transform (DWT) is applied to a nature image for sparse representation. After multi-scale DWT  the low-frequency sub-band and high-frequency sub-bands are re-sampled separately. According to the statistical dependences among DWT coefficients  we allocate different measurements to low- and high-frequency component. Then  the measurements samples can be quantized. The quantize samples are entropy coded and forward correct coding (FEC). Finally  the compressed streams are transmitted. At the decoder  one can simply reconstruct the image via l1 minimization. Experimental results show that the proposed wavelet-based CS scheme achieves better compression performance against the relevant existing solutions.   Fractal geometry of aggregates in natural grassland soils with different restoration stages 会议论文  OAI收割 Chengdu, October 11, 2012 - October 15, 2012 作者:  Zhou, Ping;  Wen, Anbang;  Zhuang, Wenhua;  Liu, Guobin   |  收藏  |  浏览/下载：23/0  |  提交时间：2018/11/10 erosion environment  soil micro-aggregates  fractal dimension  different restoration stage   Fabrication and testing of hard X-ray hourglass lenses (EI CONFERENCE) 会议论文  OAI收割 Micro and Nano Technology - 1st International Conference Society of Micro/Nano Technology, CSMNT, November 19, 2008 - November 22, 2008, Beijing, China 作者:  Zhu Y.;  Wang W.;  Wang W. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 Based on the refraction theory of the lens  the SU-8 photoresist hard X-ray hourglass lenses with three different structure parameters are fabricated. The mask-back exposure technique is introduced to fabricate the lenses. The focusing performance of this device is tested at Beijing Synchrotron Radiation Facility (BSRF). At the distance of 1.65m from the lenses  an obviously focusing performance in one dimension is observed. The relative intensity of the lenses with the largest gain is about 217.7  the gain of the lens is about 1.15  and the dimension of the focus is about 33m. The focusing performance of this device can be improved through the developing of the mask-back exposure technique. 2009 Trans Tech Publications  Switzerland.   Study of microsphere plate photomultiplier tube (EI CONFERENCE) 会议论文  OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Wang X.;  Li Y.;  Li Y.;  Li Y. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 The photomultiplier tube (PMT) that can work in different wavelength is an important detector device in remote sense technology. Microsphere plate using glass beads 50to 70m in diameter sintered together is the core component of the microsphere plate photomultiplier tube It is a novel two-dimension electron multiplier. The electrons gain for a single plate is about 1017 and do not have the phenomenon of ion-feedback. Furthermore the fabrication process is very easy. In this paper  much interest was put on the microsphere plate photomultiplier tube. Based on the analyses from the theory and the experiment result  we point out the key technology for fabricating PMT is how to obtain glass beads with narrow range in diameter and how to sinter the glass beads with a sufficient pylome. Factors affect the gradating technology and sintering process along with the solution to them is presented. In the last  the structure scheme and technological characteristic for fabricating microsphere plate photomultiplier tube were given. The pulse rising-time of MSP-PMT is below 400ps suitable to the detection of high-speed pulse. As easy to be fabricated and has great advantage over MCP multiplier in the ratio of performance to price  the microsphere plate photomultiplier tube is a promising dim-light detector.