基于ASI接口的DVB传输流发送系统

介绍了一种利用ASI接口实现MPEG－2 TS 流传输的方案，简述了设计中的主要问题及其解决方法；着重介绍了数字发送卡的硬软件设计及其在实际系统中的作用情况。     

CMOS混合信号集成电路中的串扰效应

论述了混合信号集成电路中的串扰效应及其对电路本身的影响,重点讨论了在重掺杂衬底中数字干扰对模拟器件的影响,并给出了数字噪声注入等效电路.同时从制造工艺和设计技术方面讨论了降低串扰效应的方法.     

信息卡的发展与应用

简述了信息卡的发展，介绍了卡的分类以及各种卡的特点，着重介绍了IC卡的分类和应用。     

I DDQ testing: A review

Quiescent power supply current (I _DDQ ) testing of CMOS integrated circuits is a technique for production quality and reliability improvement, design validation, and failure analysis. It has been used for many years by a few companies and is now receiving wider acceptance as an industry tool. This article begins with a brief history of CMOS ICs to provide perspective on the origin of I _DDQ testing. Next, the use of I _DDQ testing for IC quality improvement through increased defect and fault detection is described. Then implementation issues are considered, including test pattern generation software, hardware instrumentation, limit setting, IC design guidelines, and defect diagnosis. An extended reference list is provided to help the reader obtain more information on specific aspects.     

Determination of carbethopendecinium bromide in eye drops by capillary electrophoresis with capacitively coupled contactless conductivity detection

Antiseptic agent carbethopendecinium bromide (septonex) was determined by capillary electrophoresis with capacitively coupled contactless conductivity detection. Optimal separation of this quaternary ammonium ion was achieved in BGE of pH 7.0 containing 30 mM 2-(N-morpholino)ethanesulfonic acid, 12.5 mg/mL of 2-hydroxypropyl-β-cyclodextrin and 20% v/v of acetonitrile. The separation was performed at 25°C in an uncoated fused silica capillary (50 μm id; total length, 60.5 cm; effective length, 50 cm) at 30 kV. Samples were injected hydrodynamically at 50 mbar for 6 s. For quantitative analysis, L-arginine (500 μg/mL) was used as internal standard. The calibration curve was rectilinear for 25-400 μg/mL of septonex (y=0.0113x-0.0063; r(2)=0.9992). The LOD was 7 μg/mL of septonex (at S/N=3). The run-to-run repeatability (n=6) was characterized by the RSDs of 0.18% for the migration time and 1.96% for the analyte/internal standard peak area ratio. Accuracy tested by recovery experiments at three concentration levels gave recoveries of 100.27-104.22% with RSD ≤2.19%. The method was successfully applied to the assay of carbethopendecinium bromide in eye drops. Quaternary ammonium ions having structure and size close to that of carbethopendecinium may not be resolved from the analyte.     

Anion separations with pressure-assisted capillary electrophoresis using a sequential injection analysis manifold and contactless conductivity detection

It is demonstrated that a hydrodynamic flow superimposed on the mobility of analyte anions can be used for the optimization of analysis time in capillary zone electrophoresis. It was also possible to use the approach for counter‐balancing the electroosmotic flow and this works as well as the use of surface modifiers. To avoid any band‐broadening due to the bulk flow narrow capillaries of 10 μm internal diameter were employed. This was enabled by the use of capacitively coupled contactless conductivity detection, which does not suffer from the downscaling, and detection down to between 1 and 20 μM for a range of inorganic and small organic anions was found feasible. Precisely controlled hydrodynamic flow was generated with a sequential injection manifold based on a syringe pump. Sample injection was carried out with a new design relying on a simple piece of capillary tubing to achieve the appropriate back‐pressure for the required split‐injection procedure.     

离子色谱法定量检测酒曲发酵液中的河豚毒素

建立了一种离子色谱定量检测酒曲发酵液中河豚毒素的分析方法。样品经乙腈(含0.1%磷酸)溶液提取和阳离子交换柱净化后,采用离子交换色谱柱分离和紫外检测。在优化的条件下,酒曲样品中的河豚毒素在10～100 mg/L内呈良好的线性关系(r2=0.997),加标回收率为90%～103%,相对标准偏差小于4.9%,检出限(信噪比为3)为1.0 mg/L。结果表明,该方法能达到定量检测的目的。将该方法应用于实际样品的检测,验证了方法的可靠性。河豚毒素初步降解实验发现,随着时间的推移,酒曲中河豚毒素的含量逐渐减少,表明酒曲发酵液对河豚毒素的降解效果显著。     

氧弹燃烧处理试样-离子色谱法测定聚苯硫醚中总氯含量

采用氧弹燃烧法对样品进行燃烧,然后用超纯水作为吸收液吸收释出的氯或氯化物,并提出了离子色谱法分离测定聚苯硫醚中总氯含量的方法。以Metrosep A Supp 5-250型分析柱为离子交换柱,以3.2 mmol.L-1碳酸-钠1.0 mmol.L-1碳酸氢钠溶液为淋洗液等度洗脱。方法用于矿物油标准样品(AOD 1.11)和聚乙烯标准样品(ERM-EC 681K)标准样品的分析,测定值与标准值相一致。     

非相干光反馈表面轮廓测量实验研究

数值研究了非相干光反馈时半导体激光器输出功率随反馈系数的变化关系以及待侧物体离焦量与反馈系数的关系.提出了基于非相干光反馈的表面轮廓测量系统,并实验验证了系统的可行性,完成了对一元硬币的二维平面扫描成像,并分析了实验结果中的误差以及可能影响测量结果的主要因素.