EL-200AD的红外光谱剖析

本文对日本东洋制造株式会让等提供的软包装粘接剂 EL-250 的反应促进剂——EL-200AD 进行了红外光谱剖析,确定其溶剂组份系醋酸乙酯,溶质组份为甲基亚胺基二乙醇。     

半导体激光器的瞬时光谱

本文叙述半导体激光器瞬时光谱研究的理论和测试系统。     

浅析聚乳酸和聚对苯二甲酸丙二酯纤维的鉴别

以应用前景较好的两种新型聚酯纤维(聚乳酸纤维、聚对苯二甲酸丙二酯纤维)和普通涤纶(聚对苯二甲酸乙二酯纤维)纤维作样品,用显微镜观察法、燃烧试验法、化学溶解试验法、熔点试验法、红外吸收光谱试验法进行分析测试,最后得出上述两种新型聚酯纤维的具体鉴别.     

Duroc and Iberian pork neural network classification by visible and near infrared reflectance spectroscopy

Visible and near infrared reflectance spectroscopy (VIS/NIRS) was used to differentiate between Duroc and Iberian pork in the M. masseter. Samples of Duroc (n = 15) and Iberian (n = 15) pig muscles were scanned in the VIS/NIR region (350–2500 nm) using a portable spectral radiometer. Both mutual information and VIS/NIRS spectra characterization were developed to generate a ranking of variables and the data were then processed by artificial neural networks, establishing 1, 3, or 10 wavelengths as input variable for classifying between the pig breeds. The models correctly classified >70% of all problem assumptions, with a correct classification of >95% for the three-variable assumption using either mutual information ranking or VIS/NIRS spectra characterization. These results demonstrate the potential value of the VIS/NIRS technique as an objective and rapid method for the authentication and identification of Duroc and Iberian pork.     

Electrochemical characteristics of amophous carbon coated silicon electrodes

The properties of carbon films deposited by the radio frequency plasma sputtering of a fullerene C₆₀ target were investigated to elucidate the dependence on the plasma power. A radio frequency argon plasma power ranging from 50 to 300W at a pressure of 1.3 Pa was applied for sputtering. This corresponds to a self-bias potential on the target ranging from −95 to −250 V and a maximum argon ion energy ranging from 240 to 575 eV. The analysis of the G and D peaks in the Raman spectra shows that the films are similar to tetragonal hydrogenated amorphous carbon annealed at 600–1,000 °C. The electron band structure of the carbon films deposited by the sputtering of C₆₀ depends on the plasma power. The coating effect of these carbon films on the capacity performance of the silicon film electrode of lithium secondary batteries was significant in our experimental range. An electrochemical test revealed that such carbon thin film on the silicon electrode plays an important role in mitigating the capacity fading during the charge and discharge processes. The test revealed that the film formed at a plasma power of 300 W is the most effective.     

一种评价循环波动的新方法

在EQ491i多点电喷汽油机上安装了与火花塞集成一体的光纤燃烧传感器以及气缸压力传感器，测取了气缸压力以及C2(517nm)和CH(431nm)自由基的光辐射强度等数据，提出了用自由基光辐射强度峰值来评价循环波动的新方法，并与采用最高燃烧压力评价的方法进行了对比。试验结果表明，光强变化曲线反映出燃烧过程进行的好坏，这种评价循环波动的方法是可行的。     

共振态气泡浓度和尺寸分布与声压谱的关系

文章给出声波在气－液混合物中的传播方程。根据声压的频谱导出相应的共振态气泡的份额。引入临界气泡份额和极大声压相应的气泡份额，推断出共振态气泡份额与相应声压之间存在线性关系。