辽宁部分高中田径选项课的现状及发展对策

采用问卷调查、专家访谈、文献资料等方法,对辽宁省重点、普通中学高中开设田径选项课的现状进行了调查分析.研究发现,当前辽宁省重点、普通高中田径选项课正面临困境.究其原因,主要是教师对田径选项课的价值认识不足;此外,当前的田径选项课缺乏趣味性,使学生产生厌学情绪.结合健康体育教育及终身体育教育,对田径选项课在中学体育课中的地位与作用进行了论述,并针对中学田径选项课的发展提出积极的对策和建议;同时,为解决高校田径选项课中的问题提供了参考与借鉴.     

重庆市常规公交调查方法体系研究

交通调查为交通发展规划、构建交通信息数据平台提供基础数据,同时也是行业管理的需要。然而,大多数数据信息都处于离散、孤立的状态,使得调查数据的获取非常困难,因此交通调查方法的研究显得尤为重要。针对常规公交调查统计指标的需求,归纳总结交通调查的既有方法,分析各种调查方法的适用条件与优缺点,从而制定出适合重庆市常规公交调查的方法体系。     

x~n+1在有理数域上的因式分解

从特殊情况研究多项式f(x)=xn+1在有理数域上的因式分解.对于正整数,设H(n)是n的大于1的奇约数的个数.本文用初等数论和近世代数的知识证明了:多项式xn+1在有理数域上可分解为H(n)+1个不可约因式的乘积,即D(f)=H(n)+1.     

Training fieldwork supervisors of social work students at a South European University: evaluation of the effectiveness of a relational psychodynamic model

This case-study adopts a mixed research methodology in order to evaluate the process and the effectiveness of a psychodynamically informed training seminar for field supervisors of undergraduate social work students, at a South European University. At the beginning of the seminar, an anonymous questionnaire gathered information on the supervisors’ demographics, preferred supervision style and expectations from the training. The training consisted of four sessions involving analysis of (1) student process-recorded interviews with clients, (2) the relationships formed between the student, the supervisor and the field practice manager, (3) brief virtual scenarios (vignettes) of field practice problems and (4) a videotaped supervision session. At the end of the training process, a follow-up questionnaire researched the satisfaction of supervisors with the training, their confidence to conduct supervision, and their satisfaction with the instructor's teaching. Overall, the training has been satisfactory for the trainees and increased their competence to supervise.     

贯彻《通用规范汉字表》需要澄清误解——以朱大可《汉字革命和文化断裂》为例

教育部、国家语委《通用规范汉字表》是中国今后一个时期在“通用”领域使用汉字必须遵守的规范。贯彻该《字表》必须澄清前一时期文化界对简化字的种种误解。朱大可所持简化字是“字母共产主义化”、“毛体字”，造成“文化断裂”的观点，以及他对某些字形的解说，对推行规范汉字有阻力作用。建议文化名人了解语言文字知识和汉字改革历史。     

新世纪中国生态批评与生态美学的发展及其问题域

20世纪90年代开始,生态美学、生态文艺学、生态批评的研究迅速成为中国文论研究中广受关注的前沿和热点问题之一。在经过了萌发和草创阶段之后,目前已进入了学理的探索、丰富和深化阶段。尽管中国生态批评及其理论形态的生态文艺学、生态美学目前尚未完全发展成熟,但理论上的尝试和建设及争鸣已开启了学科建构的新视角、新观点,极大地推动了学科的发展,中国的生态批评和生态美学研究已初见规模,并必将在新世纪中国文论建设中承担起自己的责任。     

巴洛克文学的多元文化价值及其影响场域

巴洛克文学曾受到文学批评史的不公正对待已是不争的事实。可是文学史的发展轨迹最终表明巴洛克文学具有多元文化价值、强大的生命力和不容忽视的影响场域。巴洛克文学的多元文化价值表现在：其一,生动再现17世纪欧洲各国的社会生活现实;其二,体现多元化的审美文化追求。巴洛克文学的影响场域表现为后世作家对其思想和艺术手法的借鉴、移植和化用,虽然亦存在着难以融合的断裂感和新异感。另外,这种影响还体现为一种追新逐异、兼收并蓄的＂巴洛克精神＂的广泛渗透。     

Fertility patterns of college graduates by field of study,US women born 1960–79

Building on recent European studies, we used the Survey of Income and Program Participation to provide the first analysis of fertility differences between groups of US college graduates by their undergraduate field of study. We used multilevel event-history models to investigate possible institutional and selection mechanisms linking field of study to delayed fertility and childlessness. The results are consistent with those found for Europe in showing an overall difference of 10 percentage points between levels of childlessness across fields, with the lowest levels occurring for women in health and education, intermediate levels for women in science and technology, and the highest levels for women in arts and social sciences. The mediating roles of the following field characteristics were assessed: motherhood employment penalties; percentage of men; family attitudes; and marriage patterns. Childlessness was higher among women in fields with a moderate representation of men, less traditional family attitudes, and late age at first marriage.     

Relevance of Risk Predictions Derived from a Chronic Species Sensitivity Distribution with Cadmium to Aquatic Populations and Ecosystems

Criteria to protect aquatic life are intended to protect diverse ecosystems, but in practice are usually developed from compilations of single‐species toxicity tests using standard test organisms that were tested in laboratory environments. Species sensitivity distributions (SSDs) developed from these compilations are extrapolated to set aquatic ecosystem criteria. The protectiveness of the approach was critically reviewed with a chronic SSD for cadmium comprising 27 species within 21 genera. Within the data set, one genus had lower cadmium effects concentrations than the SSD fifth percentile‐based criterion, so in theory this genus, the amphipod Hyalella, could be lost or at least allowed some level of harm by this criteria approach. However, population matrix modeling projected only slightly increased extinction risks for a temperate Hyalella population under scenarios similar to the SSD fifth percentile criterion. The criterion value was further compared to cadmium effects concentrations in ecosystem experiments and field studies. Generally, few adverse effects were inferred from ecosystem experiments at concentrations less than the SSD fifth percentile criterion. Exceptions were behavioral impairments in simplified food web studies. No adverse effects were apparent in field studies under conditions that seldom exceeded the criterion. At concentrations greater than the SSD fifth percentile, the magnitudes of adverse effects in the field studies were roughly proportional to the laboratory‐based fraction of species with adverse effects in the SSD. Overall, the modeling and field validation comparisons of the chronic criterion values generally supported the relevance and protectiveness of the SSD fifth percentile approach with cadmium.     

纸机传动控制系统的配置与控制原理

针对纸机日益高速化、大型化的发展趋势，设计了国内先进的全数字化通信网络传动控制系统。系统采用西门子全集成自动化解决方案，实现造纸生产过程的全线集成控制。高可靠的工业现场总线PROFIBUS—DP和工业以太网相结合的网络结构，有效地实现了数据共享，全面解决了整个工艺过程的控制。文章详细介绍了控制系统的配置和功能，重点阐述了速度链、负荷分配控制、张力控制等主要控制原理。