高容量高速率两跳CDMA蜂窝网络

提出了一个高速两跳CDMA蜂窝网络结构,采用最短路径路由算法降低路径损失,以提高数据传输速率和网络容量．在不改变原网络结构和不增加网络基础设施的基础上,来实现高速高容量传输目的．结果表明提出的两跳网络结构可以提高CDMA网络传输速率和网络容量．     

‘I learned to accept every part of myself’: the transformative impact of a theatre-based sexual health and HIV prevention programme

The family—via communication (or lack thereof)—is a primary avenue for sexuality education. While most research on family sexuality communication has examined the content of parent–child communication (e.g. topics discussed), relatively few studies have assessed the process, the way in which communication occurs. This paper presents an analysis of communication process based on data collected during a qualitative, observational study of family sexuality communication with thirty low‐ and middle‐income African American mothers and their adolescent daughters living in an urban area in the southeastern USA. Two dimensions of communication process emerged: affective and stylistic. Elements of the affective dimension included connection, empathy, comfort, anger, and silence. Elements of the stylistic dimension included interactive versus didactic communication styles, use of a variety of persuasive techniques, body language, and setting. Results suggest that the process of sexuality communication is as, if not more, important than content and that affectively open and stylistically interactive sexuality communication is related to the context of close and connected mother–daughter relationships.     

Attributional profiles: Considering multiple causal attributions for success and failure at the beginning of secondary school

Students typically perceive their successes and failures to have multiple causes. The present study examined students’ profiles of causal attributions for success and failure during the first year of secondary school. The stability of attributional profile membership was assessed across three timepoints. Furthermore, it was examined whether students characterized by different attribution profiles differed in their levels of school engagement, self-esteem, and school performance. Latent profile analyses and latent transition analyses among 657 first-year Dutch secondary school students (M_age = 12.6, SD = 0.4) identified four attributional profiles, which were similar across the three timepoints. The profiles were labelled uncontrollable failure, controllable failure, uncontrollable success, and undifferentiated. About half of the students (52 %) remained member of the same profile across the three timepoints. Students in the uncontrollable success profile reported significantly lower levels of school engagement and self-esteem, and performed less well in school compared to students in the other profiles. Students in the uncontrollable failure profile and the controllable failure profile did not differ from each other with regard to school engagement, self-esteem, and school performance. The findings suggest that attributional retraining interventions may want to shift their focus from changing uncontrollable failure attributions to changing students’ external, uncontrollable attributions for success.     

A Review of Parent-Based Barriers to Parent–Adolescent Communication about Sex and Sexuality: Implications for Sex and Family Educators

Although adolescents' sexual health is generally better when parents and adolescents communicate about sex and sexuality, researchers have found parents can be reluctant to engage adolescents in conversations about those topics. To better understand why, we reviewed prior literature and identified four types of parent-based barriers to communication with adolescents about sex: limited sexual health knowledge, believing adolescents are not ready to discuss sex, discomfort discussing sex, and demographic factors. We then used the Theory of Planned Behavior to develop recommendations for how health educators can address these barriers, thereby increasing parent–adolescent sexual health communication.     

Using a comprehensive sexuality education framework to analyse the contents of a Brazilian adolescent health handbook

This study set out to analyse the sexuality contents of the Caderneta de Saúde do Adolescente, an adolescent health handbook developed for use in Brazil. Using content analysis, the adequacy of the document was assessed using an approach informed by the International Planned Parenthood Federations comprehensive sexuality education theoretical framework. Findings suggest that six out of the seven categories present within this framework were partially covered, with the handbook providing information on the prevention of sexually transmitted diseases, pregnancy and contraception. Certain key concepts were, however, discussed differently in the male and female versions of the handbook, the handbook does not address gender issues, and has very limited coverage of sexual diversity. The adolescent health handbook was a tool created to help young Brazilians to better understand what it is like to be young person, explaining some of the physical and psychological changes that occurs at this time. However, with respect to sexuality, some changes are appropriate to increase the comprehensiveness of the sexuality education that the resource provides.     

浅谈性健康教育在大学生素质教育中的必要性

性是古今中外人们和社会十分关注的话题,性健康教育已受到国内外学者和民众的普遍关注。人类的性既具有自然属性,也具有社会属性。性对人类社会来讲,一方面可以使人类生命得以延续,另一方面也可以破坏、危害社会。自20世纪70年代末以来,学校性教育在我国受到重视。当代大学生面临的各种性困惑,性行为与性反应周期、怀孕与避孕、恋爱与婚姻、正确认识性幻想、正确处理好手淫等常见的性困惑和性问题,它可影响社会的安定,也可影响到家庭的和谐幸福。因此消除性愚昧和性无知,预防性传播疾病,促进性生理和性心理正常发育,引导学生注重自身性情和人文素质与科学素质的培养在高校素质教育显得尤其重要。     

产业集群网络结构演化研究

利用计算机仿真的方法,模拟多重网络产业集群的演化过程,企业逐步被嵌入到供应链网络、集群内网络再到超级群网络,并从网络紧密程度和网络中心势两个角度,对每一阶段所形成的网络结构特征进行分析,有助于深入解多重网络产业集群,最后分阶段提出促进我国产业集群发展的政策含义。     

当代先锋小说的叙述干预

叙述的声音在沉寂多年后，又重新回荡在当代先锋小说中，但这并非时的复古，与传统小说相比，叙述的干预功能已有显不同，在叙述形式、叙述内容、释读方式上二出现了结构与反馈结构，真实与反真实，释读与反释读的悖谬。     

产学研协同创新视角下的模块商嵌入模式研究

在国内外大力推行产学研协同创新模式的大背景下,首先分析产学研协同创新的相关研究进展和存在问题,探讨模块商与企业的协同机理。在此基础上,提出产学研背景下模块商的协同创新管理策略,其中构建模块商嵌入的产学研协同创新模型,分析支持企业技术创新的模块商的经营机制等。最后,结合国内某智能电视企业的协同创新实践验证本文理论的可行性。     

近50年四川省耕地变化分析

耕地面积变化反映了社会经济发展,对粮食安全具有重要的影响.利用四川省及省域范围内的21个市、地、州1952年～2000年的耕地变化数据和经济社会发展数据,应用因子分析方法全面分析了影响耕地变化的经济、社会等主要因素,对四川省近50年的耕地面积变化的驱动力进行了研究.根据主成分分析结果,经济发展、农业科技进步、社会发展是引起四川省耕地面积变化的驱动力.经济发展引起耕地利用总量的变化、造成耕地需求结构的变化,导致大量非农用地对耕地占用的增加,造成耕地面积的减少.农业科技进步,可改良耕地,提高粮食单产,缓解经济社会发展对耕地的占用和需求.人口增加,人均耕地减少,粮食供给压力增大,而城市化水平的提高,又要占用大量耕地.在此基础上,建立多元线性回归模型,并据此预测四川省未来耕地数量的变化,结果表明2010年、2020年、2030年四川省耕地数量分别为419.101×104hm2、396.849×104hm2、374.816×104hm2,并提出了四川省耕地可持续发展的对策.