关于大学生马列主义学习小组建设的几点思考

大学生马列主义学习小组是各高校普遍开展的一种青年学生政治学习组织形式，是加强高校学生党建工作的一个重要组成部分。本文试图从丰富马列学习小组的学习内容、转换和完善学习形式、如何构建马列学习小组的组织机构和健全内部各项制度等角度出发，对提高马列学习小组的工作成效，增强“马列学习小组”对青年学生参与政治学习的吸引力等方面提出一些可以借鉴的做法。     

多媒体教学合理使用的分析

多媒体教学具有交互性、多样性特点，能够充分发挥解决教学重点、难点和疑点的功能，在实际运用时，要吃透教材，合理运用多媒体的光、影、声，结合板书来提高教学质量，避免制作课件等于备课等误区。     

江苏职业教育促进农村劳动力转移的政策建议

促进江苏农村劳动力转移是新时期赋予江苏职业教育新的历史使命,它要求职业教育必须从城乡分割走向城乡统筹,面向本地、本省、全国乃至国际劳动力市场,积极承担实施农村劳动力转移教育培训工程,并把它作为服务经济社会全局、促进职业教育良性发展的长远战略加以规划和实施.     

词汇学习策略述评

词汇是语言的重要组成部分。词汇学习越来越引起人们的重视,各种词汇策略层出不穷。客观地看待和评价每一种词汇学习策略,悉数尽知他们优缺点,从而在词汇学习中密切结合词汇的具体特点、学习条件和学习者的个人风格博采众家之长,避各家之短,以提高词汇学习的效率和效果。     

Unperturbed dimensions of atactic poly（dibenzyl itaconate）s

The unperturbed dimension and temperature character of poly(dibenzyl itaconate)s (PDBzI) are studied by a revised rotational isomeric state (RIS) method. The improved formulas of the mean-square radius of gyration, deduced by the pseudo-stereochemical equilibrium approach, may be used to investigate the configurational-conformational properties of atactic polymers with large side groups [poly(itaconates) for instance]. The calculated results showed that poly(itaconates) have larger dimension of the molecule than other vinyl polymers. Comparison of the dimension between considering and without considering side groups showed that the effect of large side groups on the unperturbed dimension for short-chain polymers is more obvious than that of long-chain polymers and, if the dimension of side groups increases, the effect also increases. The dimension differences of PDBzI between short-chain and long-chain polymers are investigated by the relation of characteristic ratios and temperature coefficients with temperature. Moreover, the dependence between the temperature coefficients and the tacticity of chains shows that the temperature characters of the isotactic, syndiotactic and atactic PDBzI chains have remarkable difference.     

"十一五"期间我国职业教育改革与发展面临的主要问题(下)

(接上期) (三)职业学校办学条件较差 1.职业学校固定资产总值水平偏低.2002年全国各类学校固定资产总值为8769.05亿元,其中高等学校固定资产总值为2379.35亿元,占27.13%;普通中学为2783.44亿元,占31.74%;小学为2374.38亿元,占27.08%.而中、初等职业学校(包括中专、技工学校、职业中学)固定资产总值为820.15亿元,仅占合计的9.35%,远低于其他几类教育.一般来说,职业学校要为学生提供实习实训设备,固定资产总值水平应该高于普通中学.目前职业学校生均固定资产投资不足,最重要的正是反映在学生实习实训设备不足方面,直接影响了学生职业技能水平的提高.     

Risk factors for infant maltreatment: a population-based study

CONTEXT: Of the approximately 900,000 children who were determined to be victims of abuse or neglect by US child protective services in 2002, the birth-to-3 age group had the highest rate of victimization (1.6%) and children younger than 1 accounted for the largest percentage of victims (9.6%). OBJECTIVE: To identify perinatal and sociodemographic risk factors associated with maltreatment of infants up to 1 year of age. DESIGN AND SETTING: Observational cohort study. PARTICIPANTS: 189,055 children born in 1996 in Florida. MAIN OUTCOME MEASURE: Infant maltreatment, defined as a verified report of abuse, neglect, or threatened harm that occurred between day 3 of life and 1 year. RESULTS: 1,602 children (.85%) of the 1996 birth cohort had verified instances of maltreatment by age 1. Of 15 perinatal and sociodemographic variables studied, 11 were found to be significantly related to infant maltreatment. Five factors had adjusted relative risks (RR) of two or greater: Mother smoked during pregnancy (RR 2.8); more than two siblings (RR 2.7); Medicaid beneficiary (RR 2.1); unmarried marital status (RR 2.0); low birth weight infant (RR 2.0). Infants who had four of these five risk factors had a maltreatment rate seven times higher than the population average. CONCLUSIONS: Data on nearly all risk factors found to be significantly associated with infant maltreatment are available on the birth certificate. Such information can be incorporated into a population-based risk-assessment tool that could identify subpopulations at highest risk for infant maltreatment. Because resources are limited, these groups should be given priority for enrollment in child abuse prevention programs.     

Deformation Behavior of Hot Isostatic Pressing FGH96 Superalloy

The deformation behavior of hot isostatic pressing (HIP) FGH96 superalloy was characterized in the temperature range of 1 000-1 100℃and strain rate range of 0.001-0.1s-1 using hot compression testing. The flow curves of HIP FGH96 superalloy during hot deformation was analyzed systematically. The results show that deformation temperature, strain rate and strain are the main influence factors on flow stress of HIP FGH96 superalloy during hot deformation. The flow stress displays a peak at a critical strain and then decreases with further increase in strain. For a given strain, the flow stress decreases with the increase of deformation temperature, and increases with the increase of strain rate. A mathematical model of these flow curves was established through regression analysis and taking the strain as a modification factor. The calculated stress values agree well with the experimental values.     

从相对论角度分析电磁学基本定律

应用相对论理论，安培定律可通过库仑定理推出，感生电动势和动生电动势可以相互转化，在此意义上磁学基本定律可进一步统一到静电学定律之中。     

日美俄基础教育学习负担改革动向及特征

学生学习负担的轻重问题一直是全球基础教育改革关注的焦点之一。日本、美国、俄罗斯三国基础教育学生学习负担改革一直呈现结合本国学生学习负担轻重实际国情,力求实现学习负担轻重动态平衡的鲜明特征,从中折射出学生学习负担改革的国际广泛性的客观规律。其启示为:我国基础教育学习负担改革应结合本国学习负担轻重实际国情,力求实现轻重动态平衡;把握学习负担国际广泛性的客观规律,借鉴学习负担改革的国际经验。