【摘 要】
：
Based on the measuring data of underwater blasting vibration and the regression analysis results of these data, two formulae usually used of blasting vibration
【出 处】
：
Journal of University of Science and Technology Beijing(Engl
论文部分内容阅读
Based on the measuring data of underwater blasting vibration and the regression analysis results of these data, two formulae usually used of blasting vibration velocity were compared. Factors that can affect blasting vibration and frequency were summarized and analyzed. It is thought that the effect of the number of freedom face and burden direction on blasting vibration should be considered during blasting design. Based on the relevant research results and the regression results of these data, a formula to calculate under water blasting frequency was put forward.
Based on the measuring data of underwater blasting vibration and the regression analysis results of these data, two formulae usually used of blasting vibration velocity were compared. Factors that can affect blasting vibration and frequency were summarized and analyzed. It is thought that the effect of the based on the relevant research results and the regression results of these data, a formula to calculate under water blasting frequency was put forward.
其他文献
【内容摘要】新课程标准要求初中生能够根据已有的条件，充分发挥想象，利用自己所学的英语知识能够组织一句语法正确、通顺的英语句子，并且组成完整的文章。英语作文教学是初中英语教学的重点内容，和英语听力能力、语感的培养一样，英语写作能力的提高也需要师生长期的共同努力。尤其是教师要采取具有趣味性的写作教学方案，激发学生的写作兴趣，为学生写作打基础。本文重点论述了在英语写作教学中，教师应该利用哪几种趣味性的写
词汇是组成语言的最基本材料,没有词汇也就无所谓语言,外语教学自然离不开词汇教学。学生不掌握一定的词汇量,就无法顺利进行听、说、读、写、译,就无法进行英语交流。在语言
目的 :通过建立家兔高脂血症动脉粥样硬化 ( AS)模型 ,观察化瘀复元胶囊对血脂、脂蛋白及动脉病理形态学改变的影响。结果 :化瘀复元胶囊大小剂量两组血清 TC、TG及动脉粥样
本文从我国现阶段钢琴启蒙教育现状入手,围绕钢琴启蒙教育中的教学目标、教学理念,教学具体实践等几个方面详细讨论了如何实现钢琴启蒙教育中的教学创新问题,并对我国钢琴启
不口蔼可亲的爸爸带着娇俏的妈妈和活泼的孩子一同驾汽车出游.到山青水秀的地方停下来.一家三口手拉手、笑嘻嘻、乐融融.享受天伦之乐。这是电视上常见的汽车广告。广播里常
日本东北大学的Iwasaki K等用感染肺炎链球菌和胃液的小鼠作为吸入性肺炎模型探讨了清肺汤的作用。感染前连续给予清肺汤4周,使小鼠的死亡率显著降低,并且这种吸入性肺炎模
“逍遥散”出自《太平惠民和剂局方》,由柴胡、当归、白芍、茯苓、白术、煨姜、薄荷少许,甘草组成,其功能为疏肝解郁、健脾养血,主治肝郁血虚证。笔者曾用本方化裁治疗肝郁血
新课程是一场意义重大的教育重组活动,其中,最活跃的因素是人。因此,教师将与新课程同行,在新课程中实现自我转变和自身发展。相对于传统的教师特征,新型教师具有教育观念新
卡泊姆940是一种新型高分子药用辅料,为白色、疏松、酸性、吸湿性强、微有臭味的粉沫,可溶于水、乙醇和甘油。1%水溶液的pH3.0,可与氢氧化钠、三乙醇胺等碱性物质中和,形成水
业已发现 ,抗原处理相关转运体 (transporter- associatedantigen processing,TAP)基因具有遗传多态性 [1 ] 。为此 ,作者对沈阳地区汉族人群进行了 TAP基因的分型研究 ,以了