非线性热传导方程u_t-Δu=D~βf(u)的Cauchy问题的整体解及渐近性

本文利用压缩映象原理及线性方程 Cauchy 问题的解的衰减性佶计,研究了一类非线性热传导方程 Cauchy 问题的整体解的存在唯一性及渐近性,得到当初值及非线性项满足一定条件之下Cauchy 问题的适当性。从而补充了文[3]的结果,首次指出了文[1]的结果是对半线性方程独有的。     

高Si/C高强度铸铁中C、Si、Si/C的作用及其选择

本文叙述了高Si/C高强度灰铸铁中碳、硅元素存在的形式及其对结晶过程的影响。试验表明,当碳当量一定时,随着Si/C的升高,初生奥氏体枝晶数量增多并且细化和强化,从而构成了强度的基础。该铸铁的强度模式应为“初生奥氏+共晶团”。本文对E型石墨存在的必然性和合理性也进行了讨论。     

一类二阶中立型时滞差分方程的振动定理

研究了一类具有变系数的二阶中立型时滞差分方程的振动性,得到了该类方程振动及差分算子△振动的一个充分条件.     

二维变系数线性微分系统的求解定理

给出二维变系数线性微分系统在已知某解的情形下求通解的公式,并直接应用此公式,导出几类二维变系数线性微分系统的通解公式.对理论和实际应用都是有益的.     

平面三次微分系统研究综述

本文首先阐明了研究E3的重要意义,然后指出E3的一般性质。奇点的分类与判定极限环线与奇异闭轨的存在性与唯一性,相对位置与代数曲线解．     

Problem‐ and solution‐focused characteristics of parenting support, 3 years after implementation of the solution‐focused approach: A qualitative content analysis

In recent years, solution‐focused parenting support has been developed and implemented as a promising brief and strength‐based approach. Given the fundamental differences between solution‐focused and the historically more common problem‐focused parenting support and the complexity of transforming professional practice, an actual shift towards solution‐focused parenting support can be expected to be limited up to now. However, because research into the specific communication characteristics of professional parenting support is currently lacking, no conclusion can be drawn at present. Therefore, this study aims to explore the current problem‐ and solution‐focused characteristics of parenting support in the Dutch youth healthcare (YH). In total, 15 support sessions performed by 10 public health nurses were audio recorded and transcribed verbatim. A detailed qualitative content analysis of professional communication was conducted to identify problem‐ and solution‐focused factual, expressive, relational and appealing aspects of parenting support. Problem‐focused characteristics dominated all sessions of parenting support. This study is the first to thoroughly analyse the problem‐focused and solution‐focused communication characteristics of professional parenting support using a qualitative content analysis. Parenting support practice in the Dutch YH did not shift substantially to a solution‐focused approach. More effort is required to stimulate and facilitate this professional transformation.     

Fused least absolute shrinkage and selection operator for credit scoring

Credit scoring can be defined as the set of statistical models and techniques that help financial institutions in their credit decision makings. In this paper, we consider a coarse classification method based on fused least absolute shrinkage and selection operator (LASSO) penalization. By adopting fused LASSO, one can deal continuous as well as discrete variables in a unified framework. For computational efficiency, we develop a penalization path algorithm. Through numerical examples, we compare the performances of fused LASSO and LASSO with dummy variable coding.     

全球化浪潮中的民族文化

西方发达国家在全球化进程中占据主导地位.经济上的支配性力量必然衍生出文化权势,因而全球化浪潮中的民族文化受到了西方"文化帝国主义"和"文化霸权主义"的侵蚀,存在着被同化的危险.与此同时,全球化也给民族文化的发展留下了空间.如何使民族文化在融合的趋势中抵御西方文化的侵蚀、保持个性,如何使民族文化发扬光大、声名远播,是摆在我们面前的重要任务.     

新形势下高校"双培"工作面临的突出问题与对策

高校"双培"工作即把高校高知识群体中的优秀分子培养成为党员,把其中优秀党员培养成为党组织负责人,做好该项工作具有重要的历史和现实意义.由于对"双培"工作的重视不够,高校的"双培"工作普遍遇到了一些新的突出问题.新时期做好高校的"双培"工作,必须切实提高高校"双培"工作的针对性、实效性和长效性.     

中共党史研究重复劳动应设法避免

本文以 1991年纪念中共建党 70周年前后出版的部分中共党史书籍及发表的部分文章为例 ,指出中共党史研究中重复劳动的情况严重 ,浪费人力、物力严重。分析了造成重复劳动的原因 ,提出了一些解决、避免重复劳动的方法。