机构

• 长春光学精密机械与物... [1]
• 数学与系统科学研究院 [1]
• 大连化学物理研究所 [1]
• 海洋研究所 [1]
• 生态环境研究中心 [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [4]
• 会议论文 [1]

发表日期

• 2020 [1]
• 2016 [1]
• 2011 [1]
• 2008 [1]
• 2005 [1]

学科主题

• Biochemist... [1]
• 物理化学 [1]

筛选

浏览/检索结果: 共5条，第1-5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 Inverse Fluid-solid Interaction Scattering Problem Using Phased and Phaseless Far Field Data 期刊论文  OAI收割 ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 2020, 卷号: 36, 期号: 1, 页码: 74-94 作者:  Ji, Xia;  Jia, Yun-fei;  Liu, Xiao-dong   |  收藏  |  浏览/下载：22/0  |  提交时间：2020/05/24 fluid-solid interaction scattering  direct sampling method  far field pattern  phaseless  phase retrieval   Direct Determination of Lead in Foods by Solid Sampling Electrothermal Vaporization Atomic Fluorescence Spectrometry 期刊论文  OAI收割 ANALYTICAL SCIENCES, 2016, 卷号: 32, 期号: 9, 页码: 1007-1010 作者:  Shang, Derong;  Zhao, Yanfang;  Zhai, Yuxiu;  Ning, Jinsong;  Duan, Delin 收藏  |  浏览/下载：24/0  |  提交时间：2016/11/22 Lead  solid sampling  electrothermal vaporization atomic fluorescence spectrometry  foods   Recent developments in solid-phase microextraction for on-site sampling and sample preparation 期刊论文  OAI收割 trac-trends in analytical chemistry, 2011, 卷号: 30, 期号: 10, 页码: 1568-1574 作者:  Duan, Chunfeng;  Shen, Zheng;  Wu, Dapeng;  Guan, Yafeng 收藏  |  浏览/下载：19/0  |  提交时间：2012/07/09 Fiber solid-phase microextraction  In-needle solid-phase microextraction  Microextraction by packed sorbent (MEPS)  Needle-trap device  On site  Sample preparation  Sampling  Solid-phase microextraction (SPME)  Stir-bar sorptive extraction (SBSE)  Thin-film microextraction   A high-accuracy parameter estimation algorithm for jointless Frequency-shift track circuit (EI CONFERENCE) 会议论文  OAI收割 ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China 作者:  Zheng X. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 FSK (Frequency Shift keying) signal  which has advantages of narrow-bandwidth  strong anti-interference ability  long transmission distance and so on  is used in jointless Frequency-shift track circuit to send different kinds of control signals. However  as FSK is non-linearly modulated  parameter estimation with high accuracy is hard to realize. Based on the spectrum analysis complement with time-frequency distribution  a highaccuracy FSK signal parameter estimation algorithm is put forward in this paper. According to the signal characteristics  under-sampling and ZFFT are used to improve the accuracy of spectrum analysis  and the base frequency resolution meets system requirement of 0.02Hz. Wigner-Ville distribution has an excellent time-frequency concentration while serious cross-term interference at the same time. Through the design of kernel function  the cross-terms are almost suppressed and the upper/down side frequency resolution meets the system requirement of 0.2Hz. The effectivities of all the methods mentioned above have been proved by MATLAB simulation  which pave a solid way for the development of high-accuracy FSK signal parameter estimation devices. 2008 IEEE.   SPME-GC-MSD for determination of nine phenyl compounds in snow water in Beijing China 期刊论文  OAI收割 CHROMATOGRAPHIA, 2005, 卷号: 62, 期号: 2015-01-02, 页码: 109-111 作者:  Zhou, S;  Huang, JX;  Gao, X;  Zhao, LW 收藏  |  浏览/下载：18/0  |  提交时间：2015/10/28 gas chromatography-mass spectrometry  solid phase microextraction  headspace sampling  snow water  phenyl compounds