激光超声的光学零差探测

激光巨脉冲在金属铝块上产生超声波,由光学零差探测得到超声引起的后表面位移的波形。文中分析了探测信号与位移的关系,导出了系统灵敏度公式。用激光超声测得铝块厚度与实际值很好地吻合,同时测出了系统的最小可探测位移。     

脲酶抑制剂给山羊口服吸收的研究

按40mg·kg~(-1)剂量给3只成年山羊口服脲酶抑制剂散剂,分别于不同时间采血,用三氯乙酸除去蛋白质后,在270nm处测定光密度,再与标准曲线对照求血药浓度。结果表明:各羊给药前后血样均无明显差异(P>0.05),即该脲酶抑制剂在山羊口服难于吸收。     

饱和增长趋势预测的自适应方法

讨论了商业、市场中大量存在的饱和增长过程的自适应预测问题,详细分析了自适应增长趋势预测尤其是Kalman滤波方法涉及的模型、模型变换、递推初值确定及趋势外椎等技术问题。     

组合证券投资有效边界的进一步研究

研究了不允许卖空情况下有效证券组合的结构特征，证明了其有效边界由一系列开口向上的抛物线段光滑连接而成，给出了连续确定有效证券组合构成变动及相应的有效边界的方法，并将有关结果推广到考虑外汇套期保值的国际组合证券投资决策中。     

一类复杂生态系统周期解的存在性

本文研究一类复杂生态系统 _i=x_i〔f_i(t)+(sum from j=1 to n)(a_(ij)(t)lnx_j)〕i=1,…,n (1)和 =x_i〔f_i(t)+sum from j=1 to n(f_(ij)(x_j)〕i=1,…,n (2)的周期解的存在性,得到了判定系统(1)和系统(2)存在周期解的充分判据,推广和改进文〔1〕和〔2〕的相应结果。     

传统装饰文脉中的女性形象研究

任何一个民族都有其特定的文化,任何一种文化都有其特定的生长土壤。装饰作为一种文化形态,伴随着中国几千年社会生活的变迁,体现着人的生命欲求和艺术鉴赏。我们通过对传统装饰文脉中女性形象的研究,可以从一个潜在层面认识中国传统装饰的艺术特性和文化品性以及深层民族精神的内核。     

Data entry workers perceptions and satisfaction response to the "stop and stretch" software program

Cumulative Trauma Disorder (CTD) is a collection of chronic musculoskeletal disorders caused by frequent, sustained, and repetitive movements, most notably by computer usage at the workplace. A computer based break reminder program (Stop and Stretch) has been developed and installed to prevent CTDs caused by prolonged computer usage at the workplace. We investigated users' opinions to the Stop and Stretch program at their work place. 19 computer users were recruited as the subjects of the study. We conducted a survey after all the subjects used the Stop and Stretch program for one month. Among the nineteen subjects, 52.5% or 10 noticed a difference of symptoms after using the program; 63.3% or 12 thought the program had positive effect on their productivity; 100% or all 19 thought the program was easy to follow; 100% or all 19 thought it was helpful; 94.7% or18 were satisfied with the program; and the same value would recommend the program to others. When grouped into those who had prior experience with using stretch and exercise as part of their work routine15 subjects had no prior experience; and 14 participants within that group were satisfied or very satisfied with the program; 93.3% or 14 would recommend it to co-workers; and over half of those 15 thought the program is easy to use. The study provided insight to the response to using "stretch break software" and provided indicators of satisfaction with the Stop and Stretch program and that the program had sufficient usability and acceptance within a workplace setting which might be applied in other work settings similar to these.     

教学学术型高校思想政治理论课教师的价值实现研究

教学学术是把教学作为学术研究,实现教与学的学术系统发展的过程。教学学术型高校思想政治理论课教师有其独特的特点,包括具有教学学术的理念意识、具有丰厚的知识储备、具有基于问题意识的教研能力、有高超的教学智慧、主动进行交流探讨、形成教学成果等方面,它的价值体现在回归教师本质、培养具有创造性的学生、是教师专业发展的主要途径等方面。实施宏观管理政策、形成制度建设导向、善于自我反思、加强自主学习是教学学术型高校思想政治理论课教师价值实现的主要途径。     

中国房地产价格指数的模拟和预测

一、基本思路和统计方法(一)基本思路目前的房地产价格指数主要包括房屋销售价格指数SI、土地交易价格指数GI和房屋租赁价格指数LI三大类,而房屋销售价格指数与公众对房地产价格波动预期的相关性最强,所以本文选择房屋销售价格指数SI来反映房地产价格指数的整体性波动。从理论上分析,房地产价格指数受供给和需求以及预期等多方面因素的影响,如果我们能够找出客观存在的影响房地产价格变动的先行指标,则有可能利用这些先行指标的变动,提前若干期来预测房地产价格变动的趋势。根据这一思路,我们按照以下步骤开展房地产价格变动的模拟与预…     

滨海城市土地利用模式与碳排放关系研究——以大连市为例

土地利用方式与人类活动碳排放强度紧密相关.文章运用以面积为标准的碳排放量计算模型,以大连市为例探讨滨海城市土地利用结构与能源消耗碳排放的关系,并对结果进行定性分析,从保证现有耕地量、增加生态林地、控制建设用地3方面提出了相关建议.