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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 定氢钢样制备方法研究 会议论文 2012国际冶金及材料分析测试学术报告会(CCATM2012), 北京, 2012-10-31 朱跃进; 孙明月; 李素娟; 郝露菡; 邓羽 收藏  |  浏览/下载：16/0  |  提交时间：2013/08/21 preparation of steel sample  ultrasonic cleaning  preparation method of sample  sample handling   Structure and magnetic properties of MgFe2O4 nanoparticles prepared by the low-temperature solid-state reaction method 会议论文 11th IUMRS International Conference in Asia, IUMRS-ICA2010, Qingdao, China, September 25, 2010 - September 28, 2010 作者:  Sun, Jianrong;  Wang, Zhiguang;  Wang, Yuyu;  Wei, Kongfang;  Li, Fashen 收藏  |  浏览/下载：6/0  |  提交时间：2017/01/20 Nanomagnetics  Film preparation  Magnetic properties  Nanoparticles  Quantum interference devices  Saturation magnetization  SQUIDs  Superconducting devices  Superparamagnetism  Bulk materials  Critical size  Grain size  Lattice distortions  Low temperatures  Magnetic targeted drugs  MgFe2O4  Multi domains  Oxygen parameter  Reducing particle  Single domains  Solid state reaction method  Ssbauer spectroscopies  Superconducting quantum interference device  Superparamagnetic transition  Surface anisotropy  Vibrating sample magnetometer  X ray diffractometers   A sensitive solid-phase time-resolved fluorescence immunoassay apparatus (EI CONFERENCE) 会议论文 International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China Wang Y.-L.; Song K.-F.; Zhang W.-L.; Li J.-L. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 In the device  a He-Ne laser of flash frequency 1-20 Hz was adopted as exciting light source  and three key technical problems have been solved successfully in order to enhance the detecting sensitivity and measuring stability of the device for time-resolved fluorimmunoassays(TRFIA) [1]. The first one is to design optimum exciting optical system  so that the exciting light beam excite the sample most effectively. The second one is to have a project spectrum filter which can reduce the affection of the background light to the photomultiplier tube and also ensure influence of the stray light and mixed diffusion light to the sample fluorescence to the least  the sample fluorescence through the integrating sphere and come to the grating monochromator  The right wavelength will be chosed through changing the angle of incidence of the grating monochromator. The third one is to simulate the principle of sample averaging of BOXCAR averager. In the device  SCM was used as primary controller and CPLD was used as timing controller. Through the preparation process  signal-to-noise ratio(SNR) will be improved  also adjust delay time  ampling frequency and sampling number arbitrarily. By testing  the sensitivity is 10-12mol/L(substance marked by Eu3+)  examination repeat is &le2.5%  examination linearity is from 10 -8mol/L to 10-12mol/L  correlation coefficient is 99.98%(p&le0.01). The instrument is advanced for ultrasensitive detection of antigen and antibody  and solve the tumor  genetic variation  the virus protein detection. 2009 SPIE.