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Stonehenge Has Got a Younger Sister Ales Stones in Sweden Decoded
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作者 Nils-Axel Morner Bob G.Lind 《International Journal of Astronomy and Astrophysics》 2012年第1期23-27,共5页
We report a novel finding that Stonehenge in England and Ales Stones in Sweden were built with the same basic geometry and using the megalithic yard as standard of measure. This opens quite new perspectives into cultu... We report a novel finding that Stonehenge in England and Ales Stones in Sweden were built with the same basic geometry and using the megalithic yard as standard of measure. This opens quite new perspectives into cultural influence, travel and trading in the Bronze Age. 展开更多
关键词 ARCHAEOASTRONOMY stone Calendars stoneHENGE ales stones
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Effects of Stone Cutting Powder (Al-Khamkha) on the Properties of Self-Compacting Concrete
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作者 Manal O. Suliman Hesham Alsharie +1 位作者 Yasser I. O. Yahia Talal Masoud 《World Journal of Engineering and Technology》 2017年第4期613-625,共13页
Most of the construction materials research now concerns on investigation of construction materials that is locally produced at a rate and cost compatible with the pace of construction. The present paper is concerned ... Most of the construction materials research now concerns on investigation of construction materials that is locally produced at a rate and cost compatible with the pace of construction. The present paper is concerned with investigation of fresh and hardened properties of self-compacting concrete (SCC) produced from local available materials in JORDAN. The produced SCC contains the local stone cut waste powder which is called Al-KHAMKHA in JORDAN with different replacement of (0%, 10%, and 25%) of fine silica aggregate;?the study also investigatesthe effects of SP33 super?plasticizer which is used by different doses (1%, 1.5% and 2%) for cement. The slump flow and the compressive strength of SCC were studied and the experimental results indicate the possibility of using Al-KHAMKHA in the production of SCC as the results showed that the compressive strength of the SCC with 10 % replacement by al-khamkha together with 1% SP33?super plasticizer was higher compared to pure SCC without al-khamkha;?the results also showed that as al-khamkha content increased the slump flow decreased. 展开更多
关键词 al-Khamkh COMPRESSIVE Strength Self COMPACTING Concrete stone POWDER SP33 Super PLASTICIZER
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镀层厚度对热纯锌板及热基锌铝镁板抗石击腐蚀性能的影响
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作者 邵蓉 黎敏 +6 位作者 刘永壮 董妮妮 李润昌 刘新华 刘洋 刘武华 王朝斌 《腐蚀与防护》 CAS CSCD 北大核心 2024年第3期30-36,共7页
采用抗石击试验和中性盐雾试验,对比研究了不同镀层厚度热镀锌(GI)板以及热基锌铝镁(ZM)板的抗石击腐蚀性能。结果表明:ZM板镀层硬度大于GI板镀层,GI试样的石击坑深度均大于50μm,而ZM120和ZM275试样的石击坑深度平均值分别仅为22.1μm... 采用抗石击试验和中性盐雾试验,对比研究了不同镀层厚度热镀锌(GI)板以及热基锌铝镁(ZM)板的抗石击腐蚀性能。结果表明:ZM板镀层硬度大于GI板镀层,GI试样的石击坑深度均大于50μm,而ZM120和ZM275试样的石击坑深度平均值分别仅为22.1μm、23.0μm;经过1176h中性盐雾试验后,GI275与GI1200石击试样表面红锈面积分别达到50%及10%,ZM120及ZM275石击试样表面无红锈;当镀层厚度相同时,ZM板的耐蚀性明显优于GI板,且同种镀层试样的耐蚀性随镀层厚度增加而提升;ZM板镀层中的Mg可有效缓冲表面薄液膜的pH,降低OH-含量,进而抑制ZnO生成,镀层腐蚀产物主要是致密的Zn5(OH)8Cl_(2)·H_(2)O,可形成物理屏障,并作为电子绝缘体阻止电化学腐蚀反应的进一步进行。 展开更多
关键词 锌镀层 锌铝镁镀层 抗石击腐蚀性能 耐蚀性
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石煤酸浸提钒过程中V、Fe、Al的浸出行为研究 被引量:7
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作者 李道 刘涛 +3 位作者 张一敏 黄晶 孙坤 汪博 《有色金属(冶炼部分)》 CAS 北大核心 2016年第6期50-53,75,共5页
在热力学计算分析的基础上,对某云母型石煤脱碳样在酸浸提钒过程中V、Fe、Al的浸出行为进行研究。结果表明,在氟化钙—硫酸浸出体系中,含钒矿物白云母溶解的同时,赤铁矿和钾长石等矿物亦会发生溶解反应,硫酸浓度、浸出温度、浸出时间、... 在热力学计算分析的基础上,对某云母型石煤脱碳样在酸浸提钒过程中V、Fe、Al的浸出行为进行研究。结果表明,在氟化钙—硫酸浸出体系中,含钒矿物白云母溶解的同时,赤铁矿和钾长石等矿物亦会发生溶解反应,硫酸浓度、浸出温度、浸出时间、液固比等参数对V、Fe、Al的浸出率影响有相同趋势,铝浸出率高于钒和铁;酸浸过程中主要矿物溶解的难易顺序为赤铁矿、白云母、钾长石,且赤铁矿达到溶解平衡所需时间较长,而白云母和钾长石可在较短时间内达到溶解平衡;要减少酸浸提钒过程中铁的溶出,可在保证钒浸出率的前提下适当缩短浸出时间。 展开更多
关键词 石煤 酸浸 V FE al 浸出行为 热力学
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基于SPH方法与ALE方法的圆盘水漂对比研究 被引量:4
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作者 华厦 邹恒 +3 位作者 徐鹏 赖豪杰 朱峰 朱卫华 《科学技术与工程》 北大核心 2013年第2期421-424,共4页
采用有限元软件包ANSYS/LS-DYNA,针对圆盘击水的过程进行数值模拟分析。在研究中分别采用基于光滑粒子流体力学的方法和基于有限体积法的ALE法的两套方案计算,并分别对比计算了圆盘成功击水的相应的临界角度以及自转的影响。并将两套方... 采用有限元软件包ANSYS/LS-DYNA,针对圆盘击水的过程进行数值模拟分析。在研究中分别采用基于光滑粒子流体力学的方法和基于有限体积法的ALE法的两套方案计算,并分别对比计算了圆盘成功击水的相应的临界角度以及自转的影响。并将两套方案与试验结果作对比,从而得出一些具有工程参考价值的图表曲线。 展开更多
关键词 alE SPH 水击跳弹LS—DYNA
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镁铝氢氧化物改性生物炭对水体中氮磷的吸附效果研究
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作者 白月霞 白静 《当代化工研究》 CAS 2023年第20期54-56,共3页
为提高硬质枣核生物炭(ZC)对水体氮磷的去除性能,采用两步溶液浸渍法制备了一组不同Mg/Al比(x)的双氢氧化物改性生物炭(ZC-x,x=2,3,4)。利用XRD、SEM/EDS、FTIR和N2吸附/脱附手段对吸附材料进行了表征。结果表明,镁铝改性剂以低结晶度... 为提高硬质枣核生物炭(ZC)对水体氮磷的去除性能,采用两步溶液浸渍法制备了一组不同Mg/Al比(x)的双氢氧化物改性生物炭(ZC-x,x=2,3,4)。利用XRD、SEM/EDS、FTIR和N2吸附/脱附手段对吸附材料进行了表征。结果表明,镁铝改性剂以低结晶度层状双氢氧化物的形态负载到ZC表面;ZC-x的比表面积和孔容积均大于ZC;在30mg·L^(-1)、pH=6.5及3℃条件下ZC-3对PO_(4)^(3-)和NO_(3)^(-)的去除率最高,分别为47.5%和27.7%,具有更高的吸附速率和更强的亲和力ZC-3。研究结果为发展水体脱氮除磷碳基吸附材料及应用技术提供了实验依据。 展开更多
关键词 枣核生物炭 镁铝层状双金属氢氧化物 磷酸根离子 硝酸根离子 吸附
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记忆·书写:满族说部的传承 被引量:2
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作者 高荷红 《贵州民族大学学报(哲学社会科学版)》 2016年第5期156-166,共11页
在业已出版和待出版的五十多部满族说部中,与国家级传承人富育光有关的超过20部,逾千万字。他是怎样将这些说部复述、记录、书写并传承下来的?与此相关的问题引起了学界的关注。通过研究我们认为,这既与富察氏家族的说部传承及其独特的... 在业已出版和待出版的五十多部满族说部中,与国家级传承人富育光有关的超过20部,逾千万字。他是怎样将这些说部复述、记录、书写并传承下来的?与此相关的问题引起了学界的关注。通过研究我们认为,这既与富察氏家族的说部传承及其独特的训练方式有关,也与富育光超常的记忆力和善于有效地利用书写手段不可或分。换言之,家族内部世代相沿的传统和规训是个体能够掌握巨量叙事资源的关键,而个人较高的文学修养和长期的记诵—书写实践也造就了传承人及其说部文本的独特性。 展开更多
关键词 满族说部 窝车库乌勒本 “石头书” 记诵 书写
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三峡石崇拜的文化内蕴及文化特征阐论
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作者 王作新 《三峡大学学报(人文社会科学版)》 2001年第1期69-74,共6页
在人类历史上,由石而生成的文化现象丰富多采。本文对发现于三峡地区的“八阵图”、“阴阳石”、“悬棺葬”的本来面貌及文化内蕴进行了历史的考察和阐论,认为这三种文化事象,从石崇拜的一隅,体现了三峡文化的某些典型特征。
关键词 石崇拜 "八阵图" "阴阳石" "悬棺葬" 三峡文化
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火山石和改性凹凸棒土对初沉单元净化效果的影响 被引量:4
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作者 王钰钦 郑尧 +3 位作者 钱信宇 杨晓曦 陈家长 吴伟 《农业环境科学学报》 CAS CSCD 北大核心 2020年第12期2868-2877,共10页
为了对养殖尾水处理系统中沉淀单元净化能力进行优化,以改性凹凸棒土(Al@TCAP-N)和火山石作为研究材料,利用显微观察和比表面积测定研究其净化机理,以TN、TP、CODMn的浓度和去除率为检测指标,研究初沉单元中两材料的净化模式、运行参数... 为了对养殖尾水处理系统中沉淀单元净化能力进行优化,以改性凹凸棒土(Al@TCAP-N)和火山石作为研究材料,利用显微观察和比表面积测定研究其净化机理,以TN、TP、CODMn的浓度和去除率为检测指标,研究初沉单元中两材料的净化模式、运行参数和回收利用能力。结果显示,Al@TCAP-N具备较大比表面积(28.58 m^2·g^-1),微生物难以附着;火山石比表面积较小(10.9 m^2·g^-1),适宜微生物附着。将两者复合使用并添加外源微生物,0~48 h水质净化效果最佳,此模式对TN、TP和CODMn的去除率分别可达41.25%、45.31%和54.97%。深入研究该模式的运行参数,结果显示两种材料最适合的复配质量比为1∶1,复配时最适添加量为1 g·L^-1,且微生物直接投加于水体中的净化效果好于固载于材料上。对使用后的净化材料进行研究,发现净化材料能够通过简单的冲洗、烘干重复利用,并且每克材料最多可富集201.73μg氮和34.98μg磷,具有潜在的资源化利用价值。研究表明,将净化材料与外源微生物联用,能够有效、实用地增强养殖尾水沉淀单元水质净化效果。 展开更多
关键词 养殖尾水处理 初沉单元 火山石 改性凹凸棒土
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复式脉冲低能量体外冲击波碎石术联合新总攻法治疗输尿管结石206例疗效观察 被引量:1
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作者 陈红其 李强 +4 位作者 刘奎 孟凡喜 杨正皓 鲍学成 姚鑫泉 《中国实用医药》 2012年第21期36-37,共2页
目的探讨采用复式脉冲低能量体外冲击波碎石术(ESWL)联合新总攻法治疗输尿管结石的疗效。方法本组选取206例输尿管结石病例,分3组分别采用复式脉冲低能量体外冲击波碎石、新总攻法排石、复式脉冲低能量体外冲击波碎石术联合新总攻法治疗... 目的探讨采用复式脉冲低能量体外冲击波碎石术(ESWL)联合新总攻法治疗输尿管结石的疗效。方法本组选取206例输尿管结石病例,分3组分别采用复式脉冲低能量体外冲击波碎石、新总攻法排石、复式脉冲低能量体外冲击波碎石术联合新总攻法治疗,观察碎石排石疗效。结果 206例输尿管结石中,复式脉冲低能量体外冲击波碎石组一次碎石后排石率84.9%,二次碎石后排石率88.1%;新总攻疗法组排石率81.9%~85.5%;复式脉冲低能量体外冲击波碎石联合新总攻法组一次碎石后排石率达91.9%,二次碎石后排石率达98.2%。治疗中无一例并发剧烈绞痛、严重血尿、穿孔、石街形成、肾功能不全等并发症。复式脉冲低能量体外冲击波碎石联合新总攻法组其结石排净率与前两组相比较P<0.05差异有统计学意义。结论复式脉冲低能量体外冲击波碎石联合新总攻法治疗输尿管结石优于单纯ESWL及总攻排石疗法,具有治疗效果佳、排石率高、安全、无严重并发症、副作用少、无创等优点。 展开更多
关键词 复式脉冲低能量 体外冲击波 新总攻疗法 输尿管结石
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New Find of Six-Spoke Sun Wheels from the Bronze Age in Scandinavia
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作者 Nils-Axel Mö rner Bob G. Lind 《International Journal of Astronomy and Astrophysics》 2018年第4期299-305,共7页
Six-spoke Sun wheels have previously been described by us from Mesopotamia, rock-carvings in Sweden and a golden sky dome from Sweden. The division of the Sun wheel into six segments refers to the six double-months of... Six-spoke Sun wheels have previously been described by us from Mesopotamia, rock-carvings in Sweden and a golden sky dome from Sweden. The division of the Sun wheel into six segments refers to the six double-months of 60 days, and a full annual cycle of 360 days. In this paper we report the findings of a stone carving with 9 six-spoke Sun wheels and two solar eclipses found and depicted in 1840 in Denmark. The spokes in the nine Sun wheels are in N-S, E-W and NW-SE direction. The NW-SE line co-insides with the sunset at summer solstice and sunrise at winter solstice, which is in full agreement with the alignment of the famous stone-ship of Ales Stones in southernmost Sweden. The new stone carving in Denmark provides a confirmation of the deep knowledge in astronomy existing among the Bronze Age people, all from Mesopotamia up the Scandinavia. 展开更多
关键词 SUN Wheel stone CARVING ARCHAEOASTRONOMY ales stones SCANDINAVIA
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An M>6 Earthquake~750 BC in SE Sweden
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作者 Nils-Axel Morner 《Open Journal of Earthquake Research》 2014年第2期66-81,共16页
At about 780-750 BC, a major earthquake struck southeast Sweden. At Brantetrask, the bedrock of quartzite was heavily fractured into big, flat blocks. Local people turned the site into a quarry for flat blocks to be p... At about 780-750 BC, a major earthquake struck southeast Sweden. At Brantetrask, the bedrock of quartzite was heavily fractured into big, flat blocks. Local people turned the site into a quarry for flat blocks to be placed around the Late Bronze Age graves at Brantevik, the big flat blocks of the sarcophagus, and two 5 tons monoliths transported 30 km to the SSW and erected as the bow and stern stones in the huge ship monument of Ales Stones. Rock carvings from the Bronze Age at Jarrestad became traversed by numerous fractures. Similar rock carving fracturing was observed at six other sites within a radius of 5 km from Brantetrask. In the shore cliff at Ales Stones a seismite was recorded and dated at 780-750 BC. At Glimme hallar, 4 km WSW of Brantevik, the bedrock shows signs of young tectonization. At Lillehem, 40 km to the NNW of Brantetrask, seismically disturbed beds were recorded and dated at the Late Holocene. The seismic event is concluded to have occurred around 780-750 cal.yrs BC and to have had a magnitude in the order of 6.3 to 6.8 and an intensity of about IX on the IES scale. 展开更多
关键词 EARTHQUAKE Late Bronze Age 750 BC Sweden ales stones Rock Carvings
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Astronomy and Sun Cult in the Swedish Bronze Age
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作者 Nils-Axel Morner Bob G.Lind 《International Journal of Astronomy and Astrophysics》 2018年第2期143-162,共20页
The Scandinavian Bronze Age started quite rapidly at around 1750 BC, and is marked by three simultaneous events: 1) importation of bronze from the east Mediterranean region, 2) export of amber from southeast Sweden to... The Scandinavian Bronze Age started quite rapidly at around 1750 BC, and is marked by three simultaneous events: 1) importation of bronze from the east Mediterranean region, 2) export of amber from southeast Sweden to the east Mediterranean region, and 3) the carving of pictures of big ships on bedrock and boulders in southern Scandinavia. We take this as evidence of travel and trading by people coming from the east Mediterranean region on big ships via Gibraltar and the North Sea to Scandinavia. At the same time, the Sun cult flourished in southern Sweden and Denmark, as evidenced by monuments perfectly oriented with respect to the Sun’s daily and annual motions over the sky (e.g. Ales Stones), rock carvings of solar symbols and in solar alignment, and a number of ritual objects related to the Sun Cult (e.g. The Golden Sky Dome). In this paper, we summarize and update available data, especially the data from Southern Sweden. 展开更多
关键词 Swedish Bronze Age Bronze Import Amber Export Rock Carving Sun Cult Phalluscult ales stones The Golden Sky Dome
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治疗性ERCP:64例回顾 被引量:1
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作者 程红岩 贾雨辰 +4 位作者 周岱云 龚彪 胡冰 孟建勤 张凤梅 《中华放射学杂志》 CAS CSCD 北大核心 1995年第2期114-117,共4页
作者回顾分析64例治疗性ERCP。男40例,女24例,年龄20~78岁。切开组28例切开顺利,25例取石成功;鼻胆管组25例和内置管组11例,引流良好分别为21例(84.0%)和9例(81.8%)。本组资料胆管结石治... 作者回顾分析64例治疗性ERCP。男40例,女24例,年龄20~78岁。切开组28例切开顺利,25例取石成功;鼻胆管组25例和内置管组11例,引流良好分别为21例(84.0%)和9例(81.8%)。本组资料胆管结石治疗最常见,有33例(51.6%);其次为恶性肿瘤24例(37.5%);其他7例(10.9%)。对胆道或胰管疾病的治疗,治疗性ERCP是一种较好的非手术治疗方法,特别是对于胆道结石,阻塞性黄疸的诊治效果良好。 展开更多
关键词 胰胆管造影术 内窥镜逆行 胆结石 ERCP
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