Reduction of energy consumption in comminution is of significant importance in mining industry. To reduce such energy consumption the energy efficiency in an individual operation such as blasting must be increased. By...Reduction of energy consumption in comminution is of significant importance in mining industry. To reduce such energy consumption the energy efficiency in an individual operation such as blasting must be increased. By using both new investigations and previous experimental results, this paper demonstrates that (1) kinetic energy carried by moving fragments in rock fracture is notable and it increases with an increasing loading rate;(2) this kinetic energy can be well used in secondary fragmentation in crushing and blasting. Accordingly, part of the muck pile from previous blast should be left in front of new(bench) face in either open pit or underground blasting. If so, when new blast occurs, the fragments from the new blast will collide with the muck pile left from the previous blast, and the kinetic energy carried by the moving fragments will be partly used in their secondary fragmentation.展开更多
目的探讨SNP微列阵检测染色体异常与稽留流产的关系。方法基于SNP微列阵检测法,检测对象为2016年12月至2018年6月期间于九江学院附属医院妇产科就诊的稽留流产的患者。从中随机抽取60例作为实验组,行人工流产术获取流产绒毛组织。同时,...目的探讨SNP微列阵检测染色体异常与稽留流产的关系。方法基于SNP微列阵检测法,检测对象为2016年12月至2018年6月期间于九江学院附属医院妇产科就诊的稽留流产的患者。从中随机抽取60例作为实验组,行人工流产术获取流产绒毛组织。同时,随机选取60例因计划外妊娠于本院行人工流产术患者作为对照组。所有样本采用随机分层抽样方法,以年龄进行分层,每层抽取20个患者作为调查对象。对照组采用传统的绒毛细胞核型分析方法进行分析,实验组采用illumina Human Cyto SNP-12芯片对流产组织绒毛DNA进行SNP微阵列检测,检查稽留流产患者染色体异常及分型情况,并采用多因素分析方法分析其相关性。结果数据分析结果显示,实验组和对照组绒毛细胞培养差异无统计学意义,但实验组准确率明显高于对照组,两组对比差异具有统计学意义(P<0.05)。结论SNP微列阵检测技术,能够全面深入分析染色体异常与稽留流产的关系,从而为临床医学诊断和治疗等提供重要参考,在临床值得进一步应用和推广。展开更多
People of the Tibetan ethnic group follow certain rituals that are remnants of the primitive religion that existed in the region many centuries ago,including buming incense and aromatic plants to create auspicious smo...People of the Tibetan ethnic group follow certain rituals that are remnants of the primitive religion that existed in the region many centuries ago,including buming incense and aromatic plants to create auspicious smoke, as well as blood rituals and the sorcerer's dance.展开更多
There are 32 households, containing a total of 189 persons, living in Kesi village, Jiedexiu Town in Gunggar County,Shannan Prefecture.Qingke, a kind of barley, is the main grain plant for people living on the Qinghai...There are 32 households, containing a total of 189 persons, living in Kesi village, Jiedexiu Town in Gunggar County,Shannan Prefecture.Qingke, a kind of barley, is the main grain plant for people living on the Qinghai-Tibetan Plateau. With a long planting history, it is widespread in Tibet, accounting for more than half of Tibet's grain planting, and even 80 percent in some high altitude and cold areas.展开更多
If Tibetan Buddhism were taken as a lake.Lhasa would be an island inits center.When the wind blows,the lake ripples with gentle waves spreading out to the eastern tip of the Qinghai-Tibet Plateau.That part of the worl...If Tibetan Buddhism were taken as a lake.Lhasa would be an island inits center.When the wind blows,the lake ripples with gentle waves spreading out to the eastern tip of the Qinghai-Tibet Plateau.That part of the world is home to Tibetan.Tu and Han ethnic groups and boasts 29monasteries of Tibetan Buddhism. Why were there so many monasteries in sucha small and remote place inhabited by not only Tibetans,but also people of other ethnic groups?展开更多
文摘Reduction of energy consumption in comminution is of significant importance in mining industry. To reduce such energy consumption the energy efficiency in an individual operation such as blasting must be increased. By using both new investigations and previous experimental results, this paper demonstrates that (1) kinetic energy carried by moving fragments in rock fracture is notable and it increases with an increasing loading rate;(2) this kinetic energy can be well used in secondary fragmentation in crushing and blasting. Accordingly, part of the muck pile from previous blast should be left in front of new(bench) face in either open pit or underground blasting. If so, when new blast occurs, the fragments from the new blast will collide with the muck pile left from the previous blast, and the kinetic energy carried by the moving fragments will be partly used in their secondary fragmentation.
文摘目的探讨SNP微列阵检测染色体异常与稽留流产的关系。方法基于SNP微列阵检测法,检测对象为2016年12月至2018年6月期间于九江学院附属医院妇产科就诊的稽留流产的患者。从中随机抽取60例作为实验组,行人工流产术获取流产绒毛组织。同时,随机选取60例因计划外妊娠于本院行人工流产术患者作为对照组。所有样本采用随机分层抽样方法,以年龄进行分层,每层抽取20个患者作为调查对象。对照组采用传统的绒毛细胞核型分析方法进行分析,实验组采用illumina Human Cyto SNP-12芯片对流产组织绒毛DNA进行SNP微阵列检测,检查稽留流产患者染色体异常及分型情况,并采用多因素分析方法分析其相关性。结果数据分析结果显示,实验组和对照组绒毛细胞培养差异无统计学意义,但实验组准确率明显高于对照组,两组对比差异具有统计学意义(P<0.05)。结论SNP微列阵检测技术,能够全面深入分析染色体异常与稽留流产的关系,从而为临床医学诊断和治疗等提供重要参考,在临床值得进一步应用和推广。
文摘People of the Tibetan ethnic group follow certain rituals that are remnants of the primitive religion that existed in the region many centuries ago,including buming incense and aromatic plants to create auspicious smoke, as well as blood rituals and the sorcerer's dance.
文摘There are 32 households, containing a total of 189 persons, living in Kesi village, Jiedexiu Town in Gunggar County,Shannan Prefecture.Qingke, a kind of barley, is the main grain plant for people living on the Qinghai-Tibetan Plateau. With a long planting history, it is widespread in Tibet, accounting for more than half of Tibet's grain planting, and even 80 percent in some high altitude and cold areas.
文摘If Tibetan Buddhism were taken as a lake.Lhasa would be an island inits center.When the wind blows,the lake ripples with gentle waves spreading out to the eastern tip of the Qinghai-Tibet Plateau.That part of the world is home to Tibetan.Tu and Han ethnic groups and boasts 29monasteries of Tibetan Buddhism. Why were there so many monasteries in sucha small and remote place inhabited by not only Tibetans,but also people of other ethnic groups?
