搜索结果: 1-14 共查到“知识库 ASE”相关记录14条 . 查询时间(0.112 秒)
不同季节豇豆中农药多残留的ASE-GPCGC/MS 检测与分析
豇豆 农药 多残留检测
2018/4/19
采用快速溶剂提取技术（ASE），结合自动凝胶过滤（GPC）技术以及气相色谱- 质谱联用法，对北京新发地蔬菜批发市场的豇豆进行不同季节的农药多残留检测。31 种农药在0.02～1.00 μg·mL-1 范围内具有较好的线性关系，相关系数均高于0.99；8 种农药的3 μg 回收率为73.49%～130.12%。检测结果表明，豇豆中检出频率比较高的农药为氟氯氰菊酯和烯酰吗啉（占53.85%），其次是氧...
模拟酸雨对水稻叶片质膜H＋ ⁃ＡＴＰASE活性与矿质元素含量的影响
水稻 细胞渗透势
2015/9/24
采用水培法研究模拟酸雨（ｐＨ＝５．０、３．５、２．５）对水稻叶片质膜 Ｈ
＋
⁃ＡＴＰａｓｅ 活性与矿质元素含量的影响．结果显示：与对照（ＣＫ）相比，酸雨
处理 ５ ｄ（胁迫期）后，ｐＨ＝５．０ 组质膜 Ｈ
＋
⁃ＡＴＰａｓｅ 活性与活化能、Ｋ
＋
、Ｃａ
２＋
、Ｍｇ
２＋含量均无显著变化，仅细胞渗透势下降．ｐＨ＝ ３．５ 酸雨导致细胞
渗透势、Ｋ
...
System Impairments and Performance Implications of ASE Seeded WDM PON Systems
ASE Seeded WDM PON Systems Performance Implications System Impairments
2015/5/18
Systematic analysis of various impairments in ASE seeded WDM PONs is presented and transmission performance limitations are determined in this paper. From a system perspective,characteristics of color...
An ASE-Injected FP-LD-Based Return-to-Zero Transmitter for Long-Reach WDM-PONs
Fiber optics optical communications Fiber optics communications
2015/6/10
We propose and demonstrate a simple RZ transmitter based on incoherent-light-injected FP-LD which improves the dispersion tolerance by a factor of 1.5. Thanks to wide timing margin between adjacent bi...
In-Service Chromatic Dispersion and Pass-Band Shape Measurements for Light Path with Modulated ASE Source
Networks wavelength routing Fiber measurement
2015/6/5
A tunable modulated broadband source and narrow-bandwidth filter are used to measure chromatic dispersion, group-delay ripple, and pass-band shape of DWDM-network light paths. This new method is simpl...
Fortistis: Split Extension in Dense Passive Optical Networks by Inline Amplification with Remote ASE-Shaped Pump Delivery via Colorless Optical Network Units
Fiber optics communications Networks Multiplexing
2015/6/4
A method for extending the customer density via ASE-pumped splitters in the tree in a WDM/TDM-PON is presented. The influence of Rayleigh backscattering in the feeder is faced,originally prohibiting a...
We investigate the effect of polarisation dependent loss (PDL) in wavelength division multiplexing-passive optical network (WDM-PON) with injection seeded reflective semiconductor optical amplifier (R...
Simultaneous Broadband Wired/Millimeter-Wave Band Transmission with Broadcasting Signal Using Direct ASE Modulation of an RSOA for WDM/SCM-PON Systems
Broadband Wired/Millimeter-Wave Band Transmission Broadcasting Signal RSOA for WDM/SCM-PON Systems
2015/7/17
A novel scheme of simultaneous broadband data transmission for both wired and millimeter-wave band with broadcasting signal is proposed based on a directly modulated amplified spontaneous emission usi...
基于气动力辨识的ASE模型降阶研究
气动伺服弹性 模型降阶 颤振抑制 H∞控制
2014/3/13
CFD/CSD耦合计算能够准确预测跨音速段飞行器弹性振动的非定常气动力, 但其带来的巨大 计算量及高阶维数不利于气动弹性系统的分析与综合. 针对于此，采用系统辨识及 均衡截断技术对高阶气动伺服弹性模型进行降阶处理，并利用所得到的低阶模型进行系统综 合：(1) 基于Volterra级数气动力辨识技术，得到非定常气动力的时域降阶模型(ROM)， 耦合结构动力学模型及控制机构动力学模型获得气动伺服弹性(...
ASE-超高效液相色谱法快速测定烟草中的多酚类物质
加速溶剂萃取 超高效液相色谱 多酚 烟草
2009/2/12
建立了加速溶剂萃取(ASE)-超高效液相色谱(UPLC)同时测定烟草中6种多酚物质的快速方法。用50%的甲醇水溶液在50℃下对烟草样品加速溶剂萃取5 min，循环萃取2次，将萃取液定容过滤后，用配置二极管阵列检测器的UPLC进行分析。此方法具有分离效率高、分析时间短、检测灵敏的优点。应用此方法对18种单料烟和14种成品卷烟中的6种多酚成分进行了测定。结果表明：①不论是在单料烟叶还是成品卷烟中，绿原...
Fast Experimental BER Extraction of 40 Gb/s Optical Signal Impacted by Jitter, ISI and ASE Noise Using Waveform Sampler
Optical Signal Impacted Jitter ISI ASE Waveform Sampler
2015/8/4
We present a new experimental BER extraction method using a sampling oscilloscope and statistical processing on EDFA noise, photoreceiver noise, jitter and ISI successfully tested on a 40 Gb/s network...
提出了并实验演示了利用247 cm新型铋基掺铒光纤和10 m传统硅基掺铒光纤联合作为增益介质、采用双向泵浦结构的超宽带放大自发辐射光源.分析了其物理机理,并与其它不同形式的结构,包括已报道的类似结构,做了实验比较和理论分析.在低于240 mW的总泵浦功率和没有使用任何外部谱平坦滤波器的情况下,通过优化传统硅基掺铒光纤长度和两泵浦源的功率,获得了96 nm（1 522 nm～1 618 nm）的波长...
消炎痛对猪胃H~+/K~+-ATP_(ase)抑制的动力学
猪胃Ｈ~＋／Ｋ~＋－ＡＴＰ_（ａｓｅ） 抑制 消炎痛
2007/12/24
摘要 消炎痛作为一种可引起胃粘膜急性病变的药物，用分离提纯的猪胃Ｈ＋／Ｋ＋－ＡＴＰａｓｅ证明，它可以显著的抑制此酶的活力，０．１ｍｇ／ｍＬ时即可抑制酶活力２７％，０．５ｍｇ／ｍＬ时可抑制全部活力，其Ｋ（０．５）为０．１８ｍｇ／ｍＬ。消炎痛对Ｈ＋／Ｋ＋－ＡＴＰａｓｅ的抑制随３０℃时预保温时间的延长而加剧，１０ｍｉｎ预保温可抑制总活力的５０％。消炎痛并不影响Ｈ＋／Ｋ＋－ＴＡＰａｓｅ的转换温度（３９℃）...