延安大学非体育专业学生课余体育锻炼的调查与分析

通过实际的调查研究、问卷调查、查阅资料等方式,结合学生的实际,对延安大学非体育类专业的部分学生进行研究,并对问卷进行分析。结果表明,大部分学生比较喜欢参加课余体育锻炼,可是由于各种原因不能持续参与的占相当大的比例。针对出现的问题进行分析,提出可行性的意见和建议,以便对大学课余体育锻炼有所帮助。     

Statistical disclosure in general three-dimensional tables

Statistical offices are concerned with problems of protecting confidential information when publishing data in statistical tables. One method to avoid disclosure is the method of cell suppression, in which the values of the sensitive cells in the table are suppressed from publication. To prevent the values of the sensitive cells from being calculated from the tables totals, additional suppressions are necessary. The problem of minimizing the loss of information caused by the additional suppressions is a difficult optimization problem. We present and compare the performance of some heuristics for cell suppression for general three-dimensional tables.     

240 kA普通平底电解槽低电压生产探索

强化电流是提高铝电解槽产量和经济效益的有效手段,广西投资集团银海铝业有限责任公司240 kA普通平底电解槽通过强化电流和降低电压,实现平均电压在4.0 V以下平稳运行,降低直流电耗约200 kW·h/t-Al。     

会计信息失真的危害及治理办法

会计信息反映企业的经营状况帮助管理者做出正确的经济决策。目前出现的会计信息失真现象扰乱了市场经济秩序,诱发经济犯罪,损害了使用者的要权益。应加强对会计信息失真的治理以建立良好的社会经济秩序。     

学生应是教学活动的主动参与者

有效地培养学生的能力、提高学生的素质,必须使学生成为教学活动的主动参与者。教师应改革教学方法,在课堂上以及在其它教学环节中,让学生有尽可能多的参与活动的机会。     

螺旋振子谐振腔滤波器的设计与应用

简要介绍了螺旋振子式腔体滤波器的原理及设计方法，给出了一个100MHz滤波器实例和在频标比对器中具体应用电路。     

硒拮抗氟引起肺脏、脾脏损伤中肥大细胞变化的观察

采用Wistar大鼠50只分别饮用含氟化钠150mg/L和含氟化钠150mg/L加不同剂量亚硒酸钠水.二个月后断头处死,取肺,脾作肥大细胞(MC),糖元PAS反应,DNA(Feulgen)反应观察.结果:肺,脾氟化钠(150mg/L)组肥大细胞与正常组比较,无明显变化.糖元PAS反应,DNA(Feulgen)反应减弱;氟化钠(150mg/L)加亚硒酸钠(2.0mg/L)组,肥大细胞显著增加,糖元PAS反应,DNA(Feulgen)反应程度增强.提示:硒在保护氟引起肺,脾损伤过程中,可能对肺、脾的肥大细胞增生和活化起促进作用.     

干法烟气脱硫渣在建材行业中高技术附加值利用的探讨

文章阐述了目前国内外对干法脱硫渣综合利用的现状,以胶凝材料学以及水泥化学为理论基础,将干法脱硫渣中的物质划分为三类,并提出在充分激发其活性的基础上,对干法脱硫渣进行高技术附加值的利用,并详细阐述了其原理和途径。     

大学英语课堂教学模式新理念与财经类双语人才的培养

大学英语教学改革的要求及经济全球化的发展趋势促使财经院校的大学英语课堂必须由以教师为中心的陈旧模式向以学生为中心的交际型课堂教学模式转变。在课堂教学中尝试不同的教学活动,激发学生的学习热情,以期实现双语人才的培养目标。     

Stock market booms and real economic activity: Is this time different?

Since World War II, the United States has experienced two large booms on the stock market. During the first boom, which lasted from the late 1940s to the mid-1960s, stock returns were clearly leading real activity. Moreover, the evidence also suggests the existence of predictable return variations in the discount rate through time as a response to changing business conditions. Therefore, the first boom does not stand out as unusual because previous studies, such as Fama (1990) or Chen (1991), confirm these results for the whole period from the 1950s to the 1980s. But during the current boom, which started in the early 1980s, these results do not hold up any more. Stock returns do not seem to lead real activity and predictable return variations as a response to business conditions cannot be detected.