QQ客服 官方微博 反馈留言

浏览/检索结果: 共11条，第1-10条 帮助 限定条件 专题：北京大学    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序提交时间升序提交时间降序题名升序题名降序作者升序作者降序 Boric acid-destabilized lithium borohydride with a 5.6 wt% dehydrogenation capacity at moderate temperatures 期刊论文 DALTON TRANSACTIONS, 2017 Wu, Yong; Jiang, Xiaojing; Chen, Jun; Qi, Yue; Zhang, Yuxuan; Fu, He; Zheng, Jie; Li, Xingguo 收藏  |  浏览/下载：30/0  |  提交时间：2017/12/03 CHEMICAL HYDROGEN STORAGE  N-H SYSTEM  AMMONIA-BORANE  SOLID-STATE  MG(NH2)(2)-2LIH SYSTEM  ENERGY EFFICIENCY  HYDROLYSIS  LIBH4  GENERATION  HYDRIDES   Open Domain Question Answering System Based on Knowledge Base 其他 2016-01-01 Lai, Yuxuan; Lin, Yang; Chen, Jiahao; Feng, Yansong; Zhao, Dongyan 收藏  |  浏览/下载：7/0  |  提交时间：2017/12/03 Chinese  Natural language question answering  Knowledge base  Information extraction   Open Domain Question Answering System Based on Knowledge Base 其他 2016-01-01 Yuxuan Lai; Yang Lin; Jiahao Chen; Yansong Feng; Dongyan Zhao 收藏  |  浏览/下载：2/0  |  提交时间：2017/12/03 Chinese Natural language question answering Knowledge base Information extraction   30 GHz spaced astro-comb for low resolution astronomical spectrographs 其他 2016-01-01 Ma, Yuxuan; Liu, Yizhou; Kong, Ziyun; Zhao, Fei; Li, Chen; Jiang, Tongxiao; Wang, Aimin; Zhao, Gang; Zhang, Zhigang 收藏  |  浏览/下载：4/0  |  提交时间：2017/12/03 GHz level fiber laser and frequency comb 其他 2016-01-01 Zhang, Zhigang; Wang, Amin; Li, Chen; Ma, Yuxuan 收藏  |  浏览/下载：4/0  |  提交时间：2017/12/03 A compact 30 GHz spaced astro-comb based on 1 GHz Yb:fiber laser 其他 2016-01-01 Ma, Yuxuan; Zuo, Lijun; Meng, Fei; Li, Chen; Jiang, Tongxiao; Wang, Aimin; Zhao, Fei; Zhao, Gang; Zhang, Zhigang 收藏  |  浏览/下载：3/0  |  提交时间：2017/12/03 Synthesis of Trifluoromethylated Cycloheptatrienes from N-Tosylhydrazones: Transition-Metal-Free Buchner Ring Expansion 期刊论文 synlett, 2015 Zhang, Zhikun; Feng, Jiajie; Xu, Yan; Zhang, Songnan; Ye, Yuxuan; Li, Tianjiao; Wang, Xi; Chen, Jun; Zhang, Yan; Wang, Jianbo 收藏  |  浏览/下载：4/0  |  提交时间：2015/11/15 diazo compounds  carbene  trifluoromethylation  Buchner reaction  cycloheptatriene  ALPHA-DIAZOCARBONYL COMPOUNDS  ENANTIOSELECTIVE TRIFLUOROMETHYLATION  CATALYZED TRIFLUOROMETHYLATION  PERFLUOROALKYLATION REACTIONS  ASYMMETRIC FLUORINATION  FUNCTIONAL-GROUPS  REAGENTS  TRANSFORMATIONS  STRATEGIES  INSERTION   1 GHz repetition rate femtosecond Yb: fiber laser for direct generation of carrier-envelope offset frequency 期刊论文 APPLIED OPTICS, 2015 Li, Chen; Ma, Yuxuan; Gao, Xiang; Niu, Fuzeng; Jiang, Tongxiao; Wang, Aimin; Zhang, Zhigang 收藏  |  浏览/下载：5/0  |  提交时间：2017/12/03 YBFIBER LASER  RING LASER  COMB  NOISE   High Power 780 nm Femtosecond Fiber Laser 其他 2015-01-01 Liu, Zuosheng; Zong, Weijian; Liu, Yizhou; Zuo, Lijun; Wen, Cai; Jiang, Tongxiao; Zhang, Jian; Ma, Yuxuan; Zhang, Zhigang; Chen, Liangyi; Wang, Aimin 收藏  |  浏览/下载：3/0  |  提交时间：2017/12/03 Generation of Homogeneous PDX1(+) Pancreatic Progenitors from Human ES Cell-derived Endoderm Cells 期刊论文 分子细胞生物学报, 2010 Cai, Jun; Yu, Chen; Liu, Yanxia; Chen, Song; Guo, Yuxuan; Yong, Jun; Lu, Wei; Ding, Mingxiao; Deng, Hongkui 收藏  |  浏览/下载：2/0  |  提交时间：2015/11/14 embryonic stem cell  retinoic acid  PDX1  pancreatic progenitor  hepatic  Smad  EMBRYONIC STEM-CELLS  BONE MORPHOGENETIC PROTEINS  RETINOIC ACID  DEFINITIVE ENDODERM  BETA-CELLS  EFFICIENT DIFFERENTIATION  DIRECTED DIFFERENTIATION  ISLET TRANSPLANTATION  MOUSE  ENDOCRINE