闻一多诗作诗论及杂文与人格的方正和圆满

作为学者的闻一多在针对其研究对象进行分析时,总是将其文和其人相结合.其实,作为人们研究对象的闻一多,其诗作、诗论与杂文等,也都是其方正人格的表现.闻一多凡事追求完美和极致,由于其人格建立在高洁的基石上,因此,他之由绅士转变为斗士,就不是政治家的政治表现,而是坚持正义、寻求真理的知识分子行为.所以,其方正人格的"绝唱"又使其诗作诗论乃至杂文的品位得到彰显.闻一多虽然失去了宝贵生命,但正因为他有"道",所以无论其诗作、诗论还是人格,都能获得圆满和永生.     

新时期高校学风问题及其对策研析——以海南大学为例

该文在对海南大学2000名大学生进行问卷调查的基础上,经过分析与综合,取得了对于新时期高校学风问题的客观、科学认知,并针对性地形成若干对策与建议.     

让学生的作文真正"生动靓丽"起来——对中学作文教学的一些反思

当前,中学生的作文普遍存在着选材千篇一律,缺乏新意;主题观念陈旧,千人一面;结构模式化、内容虚假空洞;语言匮乏,用词不规范,表达方式单一,病句错别字连篇笔一系列问题.产生这些问题的原因主要归纳为两点:其一为学生自身的原因;其二为我们语文教育工作者的责任.     

广西职业教育考察报告

2007年10月24日至11月1日,我随教育部老干部局赴广西调研组。对广西职业教育进行了考察。先后到了南宁、北海、来宾、柳州、桂林,走访了13所职业院校,和职业院校的校长、教师和学生进行了广泛的交谈。参观了职业院校的实训基地,还先后听取了广西壮族自冶区教育厅和有关市、县政府领导和教育局领导的介绍。     

"马克思主义理论学科建设研讨会"综述

2007年4月24-25日,马克思主义理论学科建设研讨会在复旦大学召开.此次会议由国务院学位委员会"马克思主义理论一级学科建设和人才培养方案研究"课题组和复旦大学马克思主义研究院联合举办.与会领导、专家和课题组成员有国务院学位办办公室副主任李军,中国人民大学教授张雷声、梁树发、张新,武汉大学教授顾海良、梅荣政、沈壮海、佘双好,复旦大学教授燕爽、顾钰民、高国希、肖巍,西南大学教授罗洪铁,中山大学教授钟明华,西安交通大学教授王宏波,华东师范大学教授宋进,东北师范大学教授张澍军、南京师范大学教授俞良早等.     

最佳的审题方法:抓主体对象

作文题目 阅读下面的材料,自选角度,自拟标题作文. 一个漆黑的夜晚,一个盲人一手拿着一根竹竿小心翼翼地探路,一手提着一个灯笼.旁人觉得好笑又好奇,问他:“你自己什么也看不见,为什么要提个灯笼赶路?”盲人缓缓地说道:“我要提着灯笼不是为自己照路,而是让别人容易看到我,不会误撞到我.而且,这么多年来,由于我的灯笼为别人带来光亮,为别人引路,人们也常常热情地搀扶我,引我走过一个又一个沟坎,使我免遭许多危险.” 要求:①符合题意,中心明确,情感真挚,语言通顺;②文体不限,除诗歌外,不少于600字;③文中不要出现真实的地名、校名、人名;④不得抄袭试卷中的材料及他人作品.     

延安大学及相关院校的历史源流与演进

抗战时期,以陕北公学为基础,合并、衍生出综合性的延安大学和华北联合大学.抗战胜利后,契合新政权需要,这两所大学所衍生的艺术、外语、工业、农学等院校时聚时散、渐合渐分,为中华民族的解放造就了大批骨干,也为新中国诸多高校奠定了基础.     

湖南省城镇居民消费结构因子的模型分析研究

对近几年湖南省城镇居民消费结构进行因子分析,研究城镇居民消费结构随着经济发展所产生的变化.在分析过程中引入了恩格尔系数和消费率两个概念,将其与因子分析相结合,从多个角度对湖南省城镇居民消费结构进行比较研究,并逐一和实际相联系.通过对分析结果的观察,研究消费结构中存在的一些问题,并分析出现这些问题的原因以及会带来的影响.最后为改善消费结构中所存在的问题,提出相关的政策建议.     

科举八股文源流考述——从经文大义到八股文的演变

科举考试文体八股文非由某人或某几个人或某个权威在某一特定的时间里制定.它是在历史的过程中,由众多的人参与不断修补完善的结果,和任何其他事物一样都有一个萌芽、成长、完备和定型的过程.八股文是从经文大义逐渐演变而成的,这一过程大致经历了这样几个阶段:试"大义"的形式,"三经新义"及论体形态,宋元经义文形态,科举八股文形态.     

阳光下的老皮箱

一 早上醒来,阳光正抚摸床脚. 窗外,天瓦蓝蓝的,如水洗过一般清明,几朵白云歇在空中,像白帽子罩在远处的楼顶上.天气晴好的周末是如此超然,恬静. 我伸伸懒腰,呼唤了两声妈妈,无人回应.去卧室找她,只见地上摊开两口老皮箱,妈妈正半蹲在地翻拣整理衣物,我断定她打算去楼顶晒旧衣. 妈妈是个勤俭的女人,趁着季节更迭,天朗气清,她必定会将家里的衣物重新收拾整理一番,再拿出去晒一晒,让旧衣物透透潮气. 昨日小区楼下来了收废旧物品的老婆婆,院子里各家各户的阿婆阿姨拎着大包小包的旧物赶上前去,或送或卖,妈妈却稳坐家中岿然不动,她说家里的东西各有其用,用不着隔三岔五丢一堆.     

一种单片机控制的三相全控桥可控硅整流器的触发电路

本研究了用MCS-96系列80C196KB单片机为基础结合外围器件来实现对可控硅三相全控桥的触发控制。采用锁相环技术及过零触发的方法，实现触发脉冲与电源信号(线电压)的同步，提高了触发器的抗干扰能力。改善了三相触发脉冲的对称性。由软件控制可产生不同顺序的6组触发脉冲。     

利用示波器测试可控硅的方法

在缺乏专门测试设备的条件下 ,利用示波器对小型可控硅的伏安特性及触发电流进行测试仍然是一种方便实用的方法 .     

一种新型充电机的原理及制作

通常使用的充电机存在输出功率小,体积大,特别是输出电流小,不利于快速充电等缺点。文章运用“可控硅”在控制极脉冲作用下能对交流电直接整流的原理,制作了一种无变压器的新型充电机。制作时元器件的选择原则是：（1）可控硅的正向阻断电压PFV≥1．5U,反向峰值电压：PRV≥（1．5－2）U‘;（2）可控硅的额定正向平均电流的有效值电压PRV应大于负载电流的有效值;（3）触发电路参数根据节点电压公式∑Vk-0;(4)电阻、电容应满足CR＝常数。     

用Protel设计SCR整流触发控制电路的体验

采用Protel 99 SE对大功率SCR三相半控全整流触发电路,进行原理图、印制电路板设计,并对电路进行仿真实验。     

某厂300MW燃煤锅炉SCR法烟气脱硝技术的应用

介绍了燃料燃烧过程中NOx的形成机理,结合某厂SCR法烟气脱硝项目,介绍了SCR法脱硝技术的工艺流程、主要系统、催化剂选型、SCR法烟气脱硝工艺的影响因素以及实际运行调节状况和运行中易出现的问题和注意事项。     

供应链风险传导的载体研究

供应链风险（SCR）传导及其载体可分成宏观载体和微观载体;显性载体和隐性载体等,其主要问题是风险传导的载体及传递的风险会导致供应链中断,因此,提出了供应链风险传导的共振效应,说明了载体在供应链风险传导过程具有重要地位,认为识别SCR传导的载体是供应链风险管理（SCRM）的基础。     

The Interface of Opinion,Understanding and Evaluation While Learning About a Socioscientific Issue

Scientific literacy is an important goal for science education, especially within controversial socioscientific issues. In this study, we analysed 143 students' research reports about stem cell research (SCR) for how they addressed specific source evaluation criteria provided within the assignment. We investigated students' opinions about SCR, how they used the evaluation criteria to evaluate online sources and whether the evaluation criteria and/or the specific sources influenced their opinion and/or understanding of SCR. We found that most of the students supported some form of SCR and reported that their sources were credible and contained more factual information than opinions. Students critiqued the language of the authors, as well as status in their respective fields, along with the content within each source. Additionally, students reported that their sources influenced their content knowledge, but had little influence regarding their SCR opinions. Through this work, we present a new working model and suggest the need for additional research about the understudied interface of opinion, understanding and evaluation within the context of important socioscientific issues. Students' opinions and content knowledge, located at the model's centre, influence and are influenced by the research topic, the sources used, the evaluation criteria and the evaluation of the sources that students use to provide evidence for claims.     

Impact of diesel emission fluid soaking on the performance of Cu-zeolite catalysts for diesel NH<Subscript>3</Subscript>-SCR systems

Diesel emission fluid (DEF) soaking and urea deposits on selective catalytic reduction (SCR) catalysts are critical issues for real diesel engine NH₃-SCR systems. To investigate the impact of DEF soaking and urea deposits on SCR catalyst performance, fresh Cu-zeolite catalyst samples were drilled from a full-size SCR catalyst. Those samples were impregnated with DEF solutions and subsequently hydrothermally treated to simulate DEF soaking and urea deposits on real SCR catalysts during diesel engine operations. Their SCR performance was then evaluated in a flow reactor with a four-step test protocol. Test results show that the DEF soaking leached some Cu from the SCR catalysts and slightly reduced their Cu loadings. The loss of Cu and associated metal sites on the catalysts weakened their catalytic oxidation abilities and caused lower NO/NH₃ oxidation and lower high-temperature N₂O selectivity. Lower Cu loading also made the catalysts less active to the decomposition of surface ammonium nitrates and decreased low-temperature N₂O selectivity. Cu loss during DEF impregnation released more acid sites on the surface of the catalysts and increased their acidities, and more NH₃ was able to be adsorbed and involved in SCR reactions at medium and high temperatures. Due to lower NH₃ oxidation and higher NH₃ storage, the DEF-impregnated SCR catalyst samples showed higher NO _x conversion above 400 °C compared with the non-soaked one. The negative impact of urea deposits during DEF impregnation was not clearly observed, because the high-temperature hydrothermal treatment helped to remove the urea deposits.     

What Undergraduates Misunderstand about Stem Cell Research

As biotechnology‐related scientific advances, such as stem cell research (SCR), are increasingly permeating the popular media, it has become ever more important to understand students’ ideas about this issue. Very few studies have investigated learners’ ideas about biotechnology. Our study was designed to understand the types of alternative conceptions students hold concerning SCR. The qualitative research design allowed us to examine college students’ understandings about stem cells and SCR. More specifically, we addressed the following questions: How can alternative conceptions about stem cell topics be categorized? What types of alternative conceptions are most common? Participants included 132 students enrolled in a biotechnology course that focused on the scientific background of biotechnology applications relevant to citizens. In this study, we used an inductive approach to develop a taxonomy of alternative ideas about SCR by analyzing student responses to multiple open‐ended data sources. We identified five categories of conceptions: alternative conceptions about what, alternative conceptions about how, alternative conceptions about medical potential, terminology confusion, and political and legal alternative conceptions. In order to improve instruction, it is important to understand students’ ideas when entering the classroom. Our findings highlight a need to teach how science can be applied to societal issues and improve science literacy and citizenship.     

重型商用车应对国Ⅳ排放标准的技术

随着国Ⅳ标准在全国即将实施,国内商用车企业纷纷采取相应技术以应对国家强制标准。通过分析SCR技术和EGR＋DPF技术,指出两种技术的优劣,提出SCR技术更适合节能减排的大趋势。