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浏览/检索结果: 共18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 A clean and efficient approach for recovery of vanadium and tungsten from spent SCR catalyst 期刊论文  OAI收割 MINERALS ENGINEERING, 2021, 卷号: 165, 页码: 9 作者:  Cao, Yijun;  Yuan, Junfan;  Du, Hao;  Dreisinger, David;  Li, Meng   |  收藏  |  浏览/下载：99/0  |  提交时间：2021/08/31 Spent Scr Catalyst  v And w Leaching  Kinetics  Regeneration   Interatomic potentials of W-V and W-Mo binary systems for point defects studies 期刊论文  OAI收割 JOURNAL OF NUCLEAR MATERIALS, 2020, 卷号: 531, 页码: 13 作者:  Chen, Yangchun;  Liao, Xichuan;  Gao, Ning;  Hu, Wangyu;  Gao, Fei   |  收藏  |  浏览/下载：27/0  |  提交时间：2022/01/18 W-V  W-Mo  Interatomic potentials  Point defects  Molecular dynamics simulation   Ce-Doped V2O5-WO3/TiO2 with Low Vanadium Loadings as SCR Catalysts and the Resistance of H2O and SO2 期刊论文  OAI收割 CATALYSIS LETTERS, 2019, 页码: 9 作者:  Liu, Xiaolong;  Zhao, Ziwei;  Ning, Ruliang;  Qin, Yu;  Zhu, Tingyu   |  收藏  |  浏览/下载：42/0  |  提交时间：2020/03/24 V-W-Ce/Ti  Selective catalytic reduction  Denitrification  Low vanadium loadings  H2O and SO2 resistance   设施蔬菜种植中氮肥施用的环境效应 研究 学位论文  OAI收割 北京: 中国科学院生态环境研究中心, 2019 作者:  赵慧   |  收藏  |  浏览/下载：35/0  |  提交时间：2020/07/30 设施蔬菜 氮肥施用 环境效应 w Hcn s _veg 模型 MEta 分析  g Reenhouse v EgEtable, n Itrogen Fertilizer Application, Environmental Effect , wHcns_veg Model, m Eta Analysis   一种从泡叶藻中提取制备低分子岩藻聚糖硫酸酯的方法 专利  OAI收割 专利类型: 发明, 专利号: CN201210424580.8, 申请日期: 2014-05-14, 公开日期: 2014-05-14 韩丽君; 袁毅; 郭书举; 曲桂艳; 刘旭 收藏  |  浏览/下载：69/0  |  提交时间：2014/08/04 一种从泡叶藻中提取制备低分子岩藻聚糖硫酸酯的方法  酸浸泡后的泡叶藻固体继续加入其体积3‑6倍的水溶液  2）将上层漂浮物调节至pH5.5‑6.5  将上述依次经稀酸和水浸泡后固态藻体采用纳米高压均质机进行细胞破碎  3）将上述合并液  4）将上述岩藻聚糖硫酸酯粗干品加入其3‑5倍重量的蒸馏水中进行溶解  其特征在于：1）将泡叶藻原料于40‑60℃下浸泡提取在泡叶藻原料干藻重量6‑10倍的稀盐酸溶液中1.3‑4.8h  搅拌浸泡4‑7h  在经过滤或高速离心  破碎后进行离心分离收集上清液B  过滤液A和上清液B混合均匀后进行超滤去除盐分  溶解后通过装有DEAE‑Sepharose F.F.的阴离子交换树脂柱进行洗脱  稀酸浸泡液待用  收集水浸泡液  收集过滤液A  而后超滤浓缩至原料重量的1/2体积（V/W）  收集洗脱液透析后于55‑65℃低温浓缩并冷冻干燥获得  保留上层漂浮物  将稀酸浸泡和水浸泡液合并待用  浓缩液进行醇沉淀  即得到原藻重量1.5‑2.3％的岩藻聚糖硫酸酯。  沉淀物干燥  即为岩藻聚糖硫酸酯粗干品   Luminescence and energy transfer in Ca3Sc2Si 3O12:Ce3+,Mn2+ white LED phosphors (EI CONFERENCE) 会议论文  OAI收割 作者:  Luo Y.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang X. 收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25 Expanded emission spectra ranging from green to red are reported in Ca 3Sc2Si3O12 (CSS):Ce 3+  Mn2+ silicate garnets. Mn2+ may occupy Ca2 site (Mn2+(I)) to generate a yellow emission band at 574 nm or Sc3 site (Mn2+(II)) with red emission band at 680 nm. Efficient energy transfers from the green emitting Ce3+ to both Mn2+(I) and Mn2+(II) occur upon blue excitation into Ce3+. Concentration dependence of Mn2+ emission is analyzed based on Ce3+-Mn2+ energy transfer  steady state rate equations  and fluorescence lifetimes. Energy transfer efficiency (nT) and rate (W) are calculated with values as high as 45% and 14.01106 s-1  respectively. 2011 Elsevier B.V.   Characteristics of ZnMgO-based metal-semiconductor-metal photodetectors (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Photoelectronic Imaging and Detection, September 9, 2007 - September 12, 2007, Beijing, China 作者:  Zhang J.;  Li B.;  Li B.;  Li B.;  Zhao Y. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 In recent years  ZnMgO semiconductor alloys  with a direct bandgap tunable between 3.37 eV and 7.8 eV  become one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper  we have fabricated metal-semiconductor-metal photodetectors on 1-m thick Zn 0.8Mg0.2O films. The interdigital metal electrodes are 500 m long and 5 m wide with an interelectrode spacing 2 m  5 m and 10 m  respectively. Zn0.8Mg0.2O films were grown on quartz by ratio frequency magnetron sputtering at 500C. Dark current  spectral responsivity and pulse response were carried out for the devices with different finger pitches. All the photodetectors showed the peak responsivity at 330 nm and the ultraviolet-visible rejection ratio (R330 nm/R400 nm) is more than four orders of magnitude at 3 V bias. For the device with 2 m finger pitch  the detectivity was calculated as 4.21011 cm Hz 1/2/W at 330 nm. Furthermore  the transient response measurement for all devices revealed similar rise time of 10 ns. The 90%-10% fall times are 130 ns  170 ns and 230 ns for the devices with different finger pitches of 2 m  5 m and 10 m  respectively..   像素设计中沟道宽和长的选择 期刊论文  OAI收割 现代显示, 2007, 期号: 5 汪梅林; 于春崎; 汪永安 收藏  |  浏览/下载：26/0  |  提交时间：2012/09/25 薄膜晶体管  沟道宽(W)  沟道长(L)  开态电流(I_(on))  关态电流(I_(off))  开口率  跳变电压(△V_p)   Vertical-cavity surface-emitting lasers with periodic gain structure (EI CONFERENCE) 会议论文  OAI收割 作者:  Wang L.;  Wang L.;  Wang L.;  Qin L.;  Sun Y. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 The periodic gain structure is used as the active region of vertical-cavity surface-emitting lasers  which can enhance the effective coupling between gain regions and internal optical field. The high device performance is achieved. The maximum continuous-wave output power of large aperture device with active diameter up to 400 m is as high as 1.41 W at room temperature. The low threshold current is only 0.5 A  which is lower than that of the conventional device with three quantum wells. 2006 Elsevier B.V. All rights reserved.   Three new compounds from Isodon melissoides 期刊论文  OAI收割 JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH, 2005, 卷号: 7, 期号: 2, 页码: 151-156 作者:  Zhao, AH;  Li, RT;  Jiang, B;  Zhang, JX;  Zhao, QS   |  收藏  |  浏览/下载：25/0  |  提交时间：2012/03/21 Isodon Melissoides  Labiatae  Diterpenoids  Melissoidesin v  Melissoidesin w  Ionone Derivatives  3 Alpha  4 Alpha-isopropyliden-beta-ionol