不等式证明的方法探索

不等式证明的途径与方法很多,每种方法都具有一定的特点和适用性,通过典型题例,分析并总结了应用高等数学理论证明不等式的方法及其适应条件。     

构造辅助函数解微分中值问题

构造辅助函数法是解决有关微分中值问题的一种重要数学方法.针对微分中值问题的结论的不同特征,本文归纳出了辅助函数的四种构造方法.     

高阶微分中值定理的推广

本文提出了n－阶（n≥1）左（右）导数的概念，并推广了高阶微分中值定理，指出了广义Lagrange中值定理仅为特例。     

Differential Response family assessments: Listening to what parents say about service helpfulness

An increasing number of Child Protective Services (CPS) systems are implementing Differential Response (DR) approaches in which lower-risk families are served through a family assessment response that emphasizes a family centered approach and the provision of concrete and preventative services. Quantitative survey data collected from parents suggests that those who receive family assessments are more engaged, receive more concrete services, and have higher overall satisfaction than those who receive a traditional investigation; yet little is known about which services provided through a family assessment are most helpful to parents. This qualitative study sought input from 20 parents who received a DR family assessment response in order to provide an in-depth analysis of which aspects of their CPS experience they perceived as most helpful. Results suggest that a positive and emotionally supportive relationship with the caseworker was of utmost significance. Other caseworker-provided services were described as helpful, particularly those that helped parents establish or improve relationships with others, including advocacy with other service providers, mediation of family disagreements, and coaching on parenting or relationship skills. Material support, such as providing cash assistance for rent or furniture, was helpful when received but occurred less frequently and was sometimes a source of frustration when accompanied by lengthy waits for assistance. These findings have implications for CPS practice, including enhancing caseworkers’ relationship-building and engagement skills through pre-service educational coursework and in-service trainings; allowing caseworkers adequate time to develop supportive relationships with parents; and reducing the institutional barriers that delay the provision of concrete support.     

微小位移检测仪表的设计开发

目前,国内常用的差动变压器式传感器测微仪有指针式和数字式两种,但是存在诸如高精度测量范围小、零位调节不方便、功能单一和通用性差等问题．本文介绍了一种以89C51单片机为核心,采用现有的差动变压器式传感器测头的多功能、智能化测微仪．它具有高精度、智能化、多功能化、操作方便、性能稳定等特点．     

深空探测VLBI测量技术

深空探测活动离不开深空测控网的支持,但是,现有航天测控系统不能满足深空探测工程的需求。VLBI测量技术测量精度高,定轨时间短,是一种很好的深空测量方法。文章讨论了VLBI的概念和差分VLBI的基本原理,VLBI的定位体制及角度测量的变换,详细分析了差分VLBI的测量精度,并展望了ΔVLBI在我国未来深空探测中的应用前景。     

针灸对消除大强度运动性疲劳的效果观察

为了研究大强度运动性疲劳的消除 ,以评定量表的方法测定了 2 2名受试者的主观体力感觉及运动心情的变化 ,观察了针灸对疲劳消除的效果。结果发现 :受试者在大强度运动持续 7天后针灸组的疲劳消除明显提高 ,进一步分析表明 ,针灸组的主观体力感觉 (RPE)、运动心情评价 (DDS)、肌肉疼痛感觉 (SR)和小腿肌肉最大收缩力量 (PT/BW)与补充营养的对照组有显著性差异 (P <0 .0 5 )。在后面 1周的恢复期 ,针灸组以上各值的恢复远快于对照组。     

二阶非齐次线性微分方程的求解

利用待定系数法导出一类二阶非齐次线性微分方程的特解公式,简化了求解过程。     

“微分方程的通解”探析

剖析了“微分方程的通解”的定义,并商榷了一些教科书（教参）中解微分方程的方法,分析解微分方程时常出现的一些错误：失根;随意去掉绝对值的符号、随意将三角函数改写成反三角函数或把反三角函数改写成三角函数形式而改变函数定义域。     

渔业资源配额微分对策研究

采用微分对策理论,构建了微分对策捕捞配额模型,深入研究了渔业资源的分配问题,为当前解决船多鱼少等尖锐问题提供了理论依据。