煤矿水污染及防治技术

阐述了煤矿各种水资源污染现象,随后针对这些现象提出了一系列技术措施,以减少煤矿水资源的污染。     

蝗虫中黄酮的含量及提取工艺研究

蝗虫含有丰富的黄酮，不同品种之间和同一品种不同地域之间有很大差异。稻蝗的黄酮含量最高，为2014.9mg／100g,内蒙黄胫小车蝗的含量最低。为293．2mg／100g。采用有机溶剂提取法对内蒙黄胫小车蝗所含黄酮提取工艺进行了研究，结果表明，甲醇具有很好的提取效果，其最佳提取工艺条件为：提取时间24h。料液比1：30，黄酮的提取量为293．2mg／100g。     

吡嗪酮生物活性和应用技术研究进展

简述了吡嗪酮的室内生物活性和田间药效试验结果,初步探讨了吡嗪酮的用药策略和使用技术。室内生测表明,吡嗪酮的作用方式为触杀、摄食、内吸、渗透等。田间试验表明,吡嗪酮具有持效期长、对成虫和若虫均有效等特点,用75～150g/hm2可有效防治稻飞虱,用30～90g/hm2可有效防治蔬菜蚜虫、小麦蚜虫等。在用药策略和使用技术方面,吡嗪酮可用于飞虱及蚜虫等害虫的综合治理,特别适用于防治对吡虫啉等产生抗药性的稻飞虱;当稻飞虱大发生时,应与毒死蜱等速效性优的药剂混合使用或加大用药剂量;在稻田使用时需要保持浅水层,以保证药效的发挥。     

Bubble nucleation and growth in fluids

The nucleation and growth of CO₂ bubbles in non-Newtonian and Newtonian fluids that were initially supersaturated under different pressures are investigated in the present work. Quantitative information by means of two cameras reveals that at an immobile nucleation site the bubble grows rapidly followed by a linear increase in bubble diameter with time. After reaching a critical size, the bubble detaches from the stagnant site to rise in liquids with an exponential temporary increase for both the diameter and distance. A simple physical reasoning was proposed to qualitatively explain these observed phenomena. Recently, the growth rate and flow fields around a CO₂ micro-bubble were measured in a microdevice by a micro-Particle Image Velocimetry in water. This information at microscale gives new insight into the complex mechanism of bubble nucleation and growth in fluids and could help to develop a rigorous theoretical modelling and numerical simulation such as the Lattice Boltzmann approach.     

添加剂在固相法制备三氧化二铬中作用的研究

研究了在固相法制备三氧化二铬中多种添加剂对三氧化二铬性能，特别是六价铬残留量和表面性质的影响。     

Friction of linerboard based on recycled fiber

The purpose of this investigation was to study the origin of the differences in paper‐to‐paper friction of linerboards based on old corrugated containers (OCC). The sheets were subjected to two extraction stages and analyzed with respect to, surface roughness, and their content of low‐molecular‐mass lipophilic compounds (LLC). Friction was measured using a friction tester based on the horizontal plane principle. The surface roughness was measured using a Perthometer profiler and the low molecular mass lipophilic constituent of the paper sheets was determined by gas chromatography‐mass spectroscopy. The sheets were imaged using environmental scanning electron microscopy (ESEM), and the relative compositions of inorganic ions on the paper surfaces were determined by energy dispersive X‐ray spectroscopy (EDS). The results showed that a high amount of LLC in the sheets lead to low friction, due to lubrication. It was also observed that large CaCO₃ particles on the surface had a friction‐increasing effect, and that there was no relationship between the surface roughness and the friction. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1511–1520, 2002     

Application of a multiline material characterization method to inkjet printed electronics

Material characterization has become increasingly important with the adoption of simulation‐based workflow for microwave electronics design. This article focuses on the characterization of printable electronics materials using transmission‐line measurements and demonstrates the capability of the multiline characterization method to separate dielectric and conductor losses when line geometry and material properties vary between the lines. The effects of multiline algorithm, number of line standards, and methods for selecting optimal line lengths are demonstrated. Consistent characterization results are obtained from inkjet‐printed transmission lines on two different substrate materials. In addition, local conductor thickness variations are demonstrated as an effective way to decrease losses. Finally, the simulation‐based procedure for determining the material properties is outlined and applied to printable electronics characterization. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:177–183, 2014.     

不同老化方式对沥青低温性能的影响分析

研究了不同老化方式对沥青低温性能的影响,分3个阶段,对不同老化方式的试验结果进行了比较.阶段1研究表明,沥青在压力老化容器(PAV)中100℃条件下老化20 h后的低温性能与在1.01×105Pa、60℃条件下老化38 d后的低温性能相差无几.阶段2研究表明,可以通过58℃、10 r/s时的高温因子G*/sinδ来修正低温性能分级,从而可以利用短期老化来代替长期老化试验.阶段3研究表明,沥青的低温性能会随着老化时间改变而变化.当老化时间较短时,低温性能分级由劲度指标控制;当老化时间较长时,低温性能分级将转变为由蠕变速率控制.     

高效甲醛阻聚剂的研制

采用醋酸乙烯酯和乙醛为原料,合成了高效甲醛阻聚剂———聚乙烯醇缩乙醛。最佳的工艺条件为:反应物料配比(n醋酸乙烯酯∶n偶氮二异丁腈∶n40%乙醛)为40∶0.9∶20,聚合反应温度59℃,聚合反应时间9h。通过控制聚乙烯醇缩乙醛的粘均相对分子质量,达到在甲醛中溶解的目的。聚乙烯醇缩乙醛在低温下对甲醛溶液有较好的阻聚作用。     

精品视频公开课拍摄技术与制作研究

根据国家教育部精品视频公开课拍摄制作技术标准(2013年版),将拍摄精品视频公开课过程中前期准备策划工作、摄像机的机位设置和拍摄角度、视频后期制作等问题进行分析。