Jurassic weak & non-stick coal in Hengshan of North Shaanxi Province was pretreated by the nitric acid.Then,it was biodegraded by Phanerochaete chrysosporium. The biodegradation role of the white-rot fungus for co...Jurassic weak & non-stick coal in Hengshan of North Shaanxi Province was pretreated by the nitric acid.Then,it was biodegraded by Phanerochaete chrysosporium. The biodegradation role of the white-rot fungus for coal is extremely significant.Orthogo- nal test demonstrate that liquefied time,liquefaction temperature and the amount of fun- gus liquids etc.are the main factors affecting the coal biodegradation rate.The best tech- nical condition of the coal biological liquefaction was got.Comparing the coal sample be- fore biodegradation with that after biodegradation,it is found that the ash of the coal resi- due after biodegradation reduces significantly,H and O contents increase,C and N con- tents decrease.The biodegradation change the coal macromolecular structure.展开更多
对于谐波激励下干摩擦振荡的非粘结振动的稳态周期解,本文在D en H artog和H K Hong的工作基础上,弱化了导出结论所需要的假设,得到了解的对称性,给出了最大速度的理论解答。分析表明,最大速度可表示为放大因子B、固有频率ωn、激振力...对于谐波激励下干摩擦振荡的非粘结振动的稳态周期解,本文在D en H artog和H K Hong的工作基础上,弱化了导出结论所需要的假设,得到了解的对称性,给出了最大速度的理论解答。分析表明,最大速度可表示为放大因子B、固有频率ωn、激振力幅值作用下的静变形p0/k三者的乘积。并用数值分析验证了最大速度的解答。展开更多
以有机硅改性环氧树脂为基体,添加纳米二氧化硅及硅烷偶联剂等助剂,研制出一种低温固化的、可用于化工设备的耐粘附涂料。当有机硅树脂质量分数达到40%~45%,纳米二氧化硅质量分数达到9.3%,制得的耐粘附涂料性能良好,喷涂后所得涂层的表...以有机硅改性环氧树脂为基体,添加纳米二氧化硅及硅烷偶联剂等助剂,研制出一种低温固化的、可用于化工设备的耐粘附涂料。当有机硅树脂质量分数达到40%~45%,纳米二氧化硅质量分数达到9.3%,制得的耐粘附涂料性能良好,喷涂后所得涂层的表面能为7.23 m J/m2,接触角达到153.56°,与底材的附着力达到1级,硬度为3H^4H。大大缓解了化工设备表面的结垢问题,延长检修周期,降低生产成本。展开更多
基金the National Natural Science Foundation of China(40772103)
文摘Jurassic weak & non-stick coal in Hengshan of North Shaanxi Province was pretreated by the nitric acid.Then,it was biodegraded by Phanerochaete chrysosporium. The biodegradation role of the white-rot fungus for coal is extremely significant.Orthogo- nal test demonstrate that liquefied time,liquefaction temperature and the amount of fun- gus liquids etc.are the main factors affecting the coal biodegradation rate.The best tech- nical condition of the coal biological liquefaction was got.Comparing the coal sample be- fore biodegradation with that after biodegradation,it is found that the ash of the coal resi- due after biodegradation reduces significantly,H and O contents increase,C and N con- tents decrease.The biodegradation change the coal macromolecular structure.
文摘对于谐波激励下干摩擦振荡的非粘结振动的稳态周期解,本文在D en H artog和H K Hong的工作基础上,弱化了导出结论所需要的假设,得到了解的对称性,给出了最大速度的理论解答。分析表明,最大速度可表示为放大因子B、固有频率ωn、激振力幅值作用下的静变形p0/k三者的乘积。并用数值分析验证了最大速度的解答。
文摘以有机硅改性环氧树脂为基体,添加纳米二氧化硅及硅烷偶联剂等助剂,研制出一种低温固化的、可用于化工设备的耐粘附涂料。当有机硅树脂质量分数达到40%~45%,纳米二氧化硅质量分数达到9.3%,制得的耐粘附涂料性能良好,喷涂后所得涂层的表面能为7.23 m J/m2,接触角达到153.56°,与底材的附着力达到1级,硬度为3H^4H。大大缓解了化工设备表面的结垢问题,延长检修周期,降低生产成本。
