锌与稀硫酸反应探析

从化学腐蚀和电化学腐蚀的不同层面解析了纯锌粒与含杂质锌粒分别与同样的稀硫酸作用时其反应速率差异极大的本质原因。     

大学生感觉寻求人格特质与网络成瘾

目的:调查大学生网络使用情况、感觉寻求特点及其与网络成癌的关系.方法:采用基本信息问卷、网络使用情况问卷、网络成瘾问卷、感觉寻求问卷对651名大学生进行调查.结果表明:(1)网络成瘾总分不具有性别、年龄、年级、专业、家庭类型、父母学历、网龄的差异性;(2)网络成瘾总分具有上网地点、生源、网络功能使用、网络使用目的的差异性;(3)网络成瘾总分与周上网时间、周上网次数、每次上网时间具有高相关;(4)网络成瘾总分与去抑制分量表得分与感觉寻求总分相关显著.结论:网络成瘾与网络使用情况、感觉寻求特点具有一定的关系.     

吐鲁番市空气质量变化趋势分析及对策研究

为了解吐鲁番市环境空气质量变化趋势及引起质量变化的主要因素,收集了吐鲁番市2001—2009年空气质量监测数据并进行了分析,结果发现污染负荷系数由大到小排列为PM10^-2^-2,而且浓度随时间（年际）呈上升趋势。由此可知吐鲁番市空气质量正在下降。     

改革教育拨款制度 提高人才培养质量

现行高等教育财政拨款制度是影响我国高校人才培养质量的因素之一,拨款制度应该与学校办学水平、社会声誉等相结合,激励高校把人才培养质量作为工作中心。努力实现质量评估与财政拨款的有机结合,培育教育中介组织,将教育财政拨款与毕业生实际就业率适当挂钩以及建立社会监督和举报制度等,均是保证人才质量的外部力量。     

Treating child abuse-related posttraumatic stress and comorbid substance abuse in adolescents

OBJECTIVE: Child abuse is a risk factor for developing Posttraumatic Stress Disorder (PTSD) and subsequent Substance Use Disorder (SUD). The purpose of this review is to summarize current knowledge about effective treatments for adolescent abuse-related PTSD, SUD, and the co-occurrence of these conditions.METHOD: The literature on empirical treatment studies for these conditions in adolescence was reviewed, summarized, and synthesized.RESULTS: Randomized controlled studies of abuse-related PTSD and SUD in adolescents have supported the efficacy of cognitive behaviorally-based individual and family treatment components. Components overlap considerably in empirically supported treatments for each disorder. An integrated treatment approach is described for use in adolescents with abuse-related PTSD and SUD, with recommendations for optimizing services for this population and for future research.CONCLUSIONS: The available evidence on effective treatments suggests that integrated PTSD- and SUD-focused cognitive-behavioral and family treatment for adolescents with comorbid abuse-related PTSD and SUD may optimize outcomes for this population.     

The long march to catch-up: A history-friendly model of China’s mobile communications industry

This paper develops a history-friendly model of the process of catch-up by Chinese firms in the mobile communications industry. It aims to explain how the sectoral environment in terms of segmented markets and generational technological change facilitated the catch-up of domestic firms with respect to foreign multinationals. Segmented markets provided a nurturing environment in peripheral markets for the survival of domestic firms starting with low level capabilities in their infant stage. Generational technological change opened windows of opportunities for domestic firms to catch-up with foreign multinationals in new product segments. Segmented markets and generational technological change allowed domestic firms to leverage their initial advantages in peripheral markets to catch-up in core markets. Counterfactual simulations highlight that the process of catch-up was facilitated by relatedness across technological generations. This paper contributes to the literature on catch-up and industry evolution by illustrating the role of technological change and market regimes in the process of catching-up.