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“两硬”条件下半煤岩巷掘进一直是影响大同煤矿集团有限责任公司采掘关系的主要问题。在四台矿11#层410盘区51003半煤岩施工过程中,通过合理选择施工方法、科学组织施工,实现了快速掘进。 相似文献
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随着技术的进步,企业对高职供用电技术专业学生的技能要求越来越高,提高学生的实际动手能力,满足社会对高技能人才的需求是教学改革的重点,本文提出了一种新的实践教学体系及实施措施,改革后取得的效果。 相似文献
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以尿素和氯化镍为原料,采用水热法制备了泡沫镍载Ni(OH)2纳米片电极,利用扫描电镜(SEM)观测了纳米片的形貌,利用X-射线衍射(XRD)分析了纳米片的结构,通过循环伏安和恒流充放电测试了电极的超级电容性能.检测结果表明:所制备的Ni(OH)2纳米片先构成一种交错连接的线状结构,再以线的形式均匀而密集地覆盖在泡沫镍的骨架上.这种特殊结构使得该纳米片电极表现出良好的电容性能,在电流密度为10mA/cm2的情况下,其面积比电容为255mF/cm2. 相似文献
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赵建伟 《广西民族大学学报》2005,(Z2)
一个社会的贫困虽然表现为经济的物质的匮乏,但是这种贫困的背后却有着深刻的文化背景和根源。扶贫方式可以说是一种指导变迁。要根除苦聪人的贫困,有必要对其传统文化进行研究。 相似文献
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The gasification wastewater is a kind of typical organic industrial wastewater with high chemical oxygen demand (COD) and ammonia nitrogen, which could not be completely degraded by the traditional physical, chemical and biological method. So it is very important to find an effective treatment process. A combination process of catalytic oxidation with noble metal catalysts and aerobic biological fluid-bed packed with the new ultrastructure biological carriers, which was developed by ourselves, was investigated to treat the gasification wastewater. The pilot scale test with 0.5 m^3/h influent flow was carried out to investigate the performance of this new combination process. The results showed that the effluent COD was 84.02 mg/L, ammonia nitrogen was 14.15 mg/L, and total phenol was 0.20 mg/L, which could completely meet the Grade I of Wastewater Discharge Standard (GB8978-1996), when the influent average COD was 5 564 mg/L, ammonia nitrogen was 237 mg/L, and total phenol was 1 100 mg/L. The two catalytic reactors could evidently improve the wastewater biodegradability, and the value of BOD5/COD (B/C) increased from 0.23 to 0.413 in the one-stage catalytic reactor and from 0. 273 to 0.421 in two-stage catalytic reactor. The further experiment results showed that the effluent quality of this new combination process could still meet the discharge standard, when the COD loading was 8.65 kg / (m^3· d). Most of aromatic and heterocyclic compounds were degraded effectively in this combination process. 相似文献
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以硝酸镍、尿素、六次甲基四胺为原料,利用水热法与离子溅射镀金相结合在柔性的碳布上合成了氧化镍/金复合纳米片材料;利用扫描电镜(SEM)观测了纳米片的形貌,利用能谱仪(EDS)分析了纳米片的成分;通过循环伏安和恒流充放电测试了各样品的电化学电容性能.检测结果表明:通过与金相复合,提升了氧化镍的电化学电容性能.这一简单有效的合成策略也为提升其他氧化物纳米材料的电容性能提供了参考. 相似文献
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