基于μC/OS-Ⅱ系统的TCP/IP协议栈实现

在嵌入式实时操作系统中引入TCP/IP协议栈,以支持嵌入式设备接入网络,成为嵌入式领域重要的研究方向。介绍了开源的μC/OS-Ⅱ实时操作系统结构和在STM32上的移植方法,研究了嵌入式TCP/IP协议栈结构及工作流程,并详细描述协议栈中ARP、IP和TCP这3种最重要协议在μC/OS-Ⅱ系统上的具体实现。     

求解0/1背包问题的烟花算法研究

0/1背包问题是一个典型的NP难题,具有重要的理论研究价值,也具有广泛的应用基础。借鉴北京大学关于烟花算法的新近成果,尝试考虑二者的结合,初步设计并实现了求解0/1背包问题的烟花算法,开展了较为充分的实验,并作了相关分析与探讨。     

Subject English as citizenship education

This article is equal parts educational history and political philosophy. We aim to remind readers that subject English (SE) and indeed state education emerge from the contradictory impulses of classical liberalism, and that, more than simply resembling citizenship education, SE emerges in the first instance as a form of highly normativising citizenship education. We further argue that, following England's recent educational reforms initiated by former Education Secretary Michael Gove, SE continues to be framed in moral terms consistent with citizenship education—again, of a highly normativising sort. England's current educational policy generally, and specifically the framing of SE, employs the language of liberal possibility, while ultimately espousing an invidious exclusionary and assimilationist politics. The framing of SE, moreover, is one that misrepresents the supposedly ‘rich and varied literary heritage’ it is supposed to exemplify and promote. The current political landscape in which the study of literature takes place is one where a crisis of liberalism is manifest (in terms of populism, radicalisation or apathy). However, we do not believe the answer is to retreat into a sealed, hermetic canon that excludes the reality that England and English literature are fundamentally multicultural and polyethnic. SE will be the poorer for not fully acknowledging and embodying this, for not enabling students to imaginatively and critically engage with characters and experiences that reflect both the present and long-standing diversity of English society, as well as its present and long-standing inequalities.     

Developing ‘active citizens’: Arts Award,creativity and impact

Creativity has become the new watchword in UK academic and policy circles. Within this context, policy discussions about the arts and their impact emphasise economic benefits over educational value, drawing clear distinctions between quantifiable or ‘hard’ measures of impact and those described as ‘soft’, less tangible and lacking a strong evidence base. Departing from the binary logics often underpinning notions of arts impacts, this article is novel in exploring the entwined relationship between impacts seen as ‘hard’ and ‘soft’. We draw on research examining the links between arts education and young people's future trajectories and use the concept of ‘active citizenship’ to show how informal, softer skills fostered through creative learning are an important part of citizenship-making for some young people. Participants’ accounts show how improvements in soft skills can give young people opportunities for agency, which shape progression pathways leading to measurable change. This finding is directly relevant in the context of evaluations of arts impacts in the UK and abroad, and should encourage further examination of the impact of creative learning on transfer of skills as well as policy developments in this area.     

基于B/S体系的高职教学评估系统

系统的实现基于B/S体系,在中间层采用先进的MVC设计模式思想,实现页面显示与业务逻辑的分离,有效提高系统的可维护性、可扩展性和可复用性,极大地提高了迎评工作的效率。     

头孢哌酮/舒巴坦治疗呼吸系统感染175例临床观察

目的观察头孢哌酮/舒巴坦治疗呼吸系统感染的疗效及安全性。方法对2006年1月～2010年12月175例用头孢哌酮/舒巴坦治疗呼吸系统感染的情况进行回顾性研究,总结其疗效及毒副作用。结果头孢哌酮-舒巴坦的用量每日2g～4g,疗程5～18天;用药后3～6.5天体温下降,体温下降率92.0%;白细胞数升高者用药后85.4%降至正常范围,炎性X线征象52.6%消失或明显吸收好转,痰细菌培养阳性者细菌清除率为85.1%;总有效率为86.9%,无效者中有12例为严重粒细胞缺乏;有16例丙氨酸转氨酶短暂升高,余未见其它副作用。结论头孢哌酮/舒巴坦治疗呼吸系统感染安全有疗效。     

风雨百年唱新诗

声诗是中国古代诗歌的主流样式。在中国百余年来波澜壮阔的现代性伟大历史变革中,新声诗始终呼应乃至推动着社会变革的大潮,歌唱新思想、歌唱新人物、歌唱新时代的伟大变革和激烈斗争。它成功地走过了学堂乐歌、救国战歌、建设颂歌、改革潮音四个阶段,出现了大量的长期活在亿万人民心头、口头的不朽诗篇。但迄今为止,它的思想、艺术成就仍未得到应有的评价并一直被排除在＂新诗＂之外。     

海藻酸钠/钠化累托石共辐射接枝丙烯酸

以⁶⁰Coγ为辐射源,在氮气保护下对海藻酸钠/钠化累托石（SA/Na⁺REC）复合物和丙烯酸（AA）进行共辐射制备海藻酸钠/钠化累托石接枝聚丙烯酸（SA/Na⁺REC-g-PAA）。利用IR、XRD及SEM对产品结构及形态进行分析。考察了辐射条件对产品接枝性的影响,结果表明,当Na⁺REC质量分数为2%,丙烯酸与SA/Na⁺REC质量配比为8,辐射总剂量为9.0kGy,甲醇与水的体积比为8:2时,产品接枝性最好其接枝率,接枝效率分别达130.8%、82.4%。SEM表明辐射引发可得到多孔疏松的产品。初步探讨了辐射接枝机理。     

重组猪囊尾蚴cC1蛋白用于囊尾蚴病人血清抗体的检测

诱导、表达含有猪囊尾蚴cC1蛋白基因的原核表达载体pET-28a质粒(pET28a-cC1),纯化、鉴定融合蛋白,以此作为抗原包被反应板,对囊尾蚴病人等血清进行ELISA检测。检测56份囊尾蚴病患者血清,抗体阳性者53份,阳性率为94.7％;检测30份血吸虫病患者血清,交叉反应率为3.33％(1/30);检测30份正常...     

基于ASP.NET的时间服务平台的设计与实现

基于ASP.NET技术构建时间服务平台,充分发挥服务平台的网络效益,供大学生进行时间租赁、存储或时间交换。简要叙述平台的业务流程、数据模型、基于ADO.NET的数据库实现以及信用认证方法。