两正态总体均值与标差商的比的似然比检验

两个正态总体的均值与标准差的商的比值等于定值的似然比检验.给出了假设下的最大似然估计,似然比统计量及其渐近分布。     

论大学生思想政治教育工作机制——以新疆地区高校为例

随着社会的发展和高校内外部环境的变化，以及新疆特殊的地理民族环境和大学生自身思想心理态势的变化，新疆地区高校的思想政治教育工作面临着一系列新问题。我们必须构建全方位、全过程、全员大学生思想政治教育工作机制，确保高校稳定，培养出合格的社会主义建设人才。     

Review on development progress of automatic manual transmissions control

In recent years, the sustainable development of automatic manual transmissions (AMTs) control in vehicles is conspicuous. The control applications have grown fast and steadily due to the tremendous progress in power electronics components and the control software that enhance the requirements for delivering higher vehicles performance. AMTs control strategies achieve a reduction in the driveline dynamic oscillations behavior during gear shifting and clutch starting up processes. AMTs future expectations are an increase of torque capacity, more speed ratios and the development of advanced and efficient electronic control systems. This paper concerns with the progressing view of AMTs in the past, today and future, gives an overview of the potential dynamic problems concerned with AMTs and some control strategies used to solve those problems.     

茉莉酸对油菜(Brassica napus L.)受镉毒害的缓解作用（英文）

目的:本研究目的在于了解:(1)喷施外源茉莉酸对受到镉胁迫油菜的作用;(2)是否茉莉酸能够通过增强气体交换,从而保护受到氧化胁迫的地上部分组织的叶绿体,进而通过减少镉的吸收来维持离子平衡;(3)是否通过喷施茉莉酸来对具有减缓镉毒害效应的抗氧化酶的活性进行调节。创新点:茉莉酸能够调节响应胁迫的抗氧化酶的活性,从而通过保护叶绿体免受活性氧(ROS)伤害而提高光合产物的能力,最大限度地缓解油菜植株受到的镉毒害。方法:(1)叶片气体交换;(2)叶片光合色素分析;(3)丙二醛与抗氧化酶活性分析;(4)营养成分分析;(5)透射电镜亚细胞水平观察。结论:茉莉酸对于植物受镉毒害的缓解作用的机理在于减少叶片中镉的积累,从而减轻氧化胁迫过程中产生的ROS对于膜系统的损害程度。     

黄河流域水权制度的问题、挑战和对策

流域水权制度建设是黄河水沙关系调节的关键。本文基于中国水权制度建设框架,回顾了黄河流域水权制度的发展过程,分析了存在的问题和面临的挑战,并提出了完善黄河流域水权制度的建议。黄河流域是中国现代水权制度建设的典范,通过自发和问题驱动机制,流域制定了水量分配方案、开展了水量调度、探索了水权转换和进行了水权明晰。但流域水权制度建设没有完成,存在用水计划没有灵活性、用户没有选择性、交易没有市场以及调度取代取水许可管理等问题。同时,水权制度还面临40年来流域经济、社会和生态环境的剧烈变化,以及水资源量、用水结构和水沙关系的根本性转变。最后,建议黄河流域进一步明晰水权、建立生态和环境水权、构建水权交易机制、转变机构职能和进一步推进水资源监测、计量和管理系统建设。     

浅谈辅导员做好大学班级学生工作的思路

本文简要阐述辅导员概念及其基本职责,提出辅导员做好班级学生工作的思路是应当认真把学校和学院的规章制度及时传送到班级学生,倡导班级学生所有人共同进步一个都不能少的理念,根据学生的性格特点、心理特征等进行分类建档并加以细心指导,依据班级年级的递增教育和指导内容有所侧重,加强班级学生干部队伍的培养和建设,在评优、评奖等关乎学生切身利益上发挥学生自我管理和秉持公开、公平、公正、真实的原则办事,开好每一次主题班会等。     

'To Be a Girl': Culture and class in schools Correspondence : Suki Ali,Goldsmiths College,University of London,Sociology Department,New Cross,London SE14 6NW,UK. E-mail: S.ali@gold.ac.uk

The problem of theorising multiplicities is one with which many feminists are currently engaged. This paper utilises recent feminist writing on social class to investigate the interplay of ethnicity, 'race' and class in the production of femininities. Drawing on ethnographic data gathered with children aged 8-11 years old, it argues that politically engaged cultural studies of class have most to offer in terms of analyses of the identifications of girls growing up in multi-ethnic urban locations. The case study of a London school provides rich insights into the complexities that both teachers and pupils deal with on a daily basis, and how it is that current formulations of 'anti-racist' thinking limit identifications for minority ethnic and 'mixed-race' children. Miranda's story is one of complex narratives of ethnic and class belongings that require careful self-regulation in order to find 'gendered acceptability' within the school environment. The paper argues that we must be ever mindful of the limits to terminologies in order to work with a range of multiplicities in ways that challenge the tenacity of racism, classism and sexism in schools and society generally.     

A Proposed System for Academic Advising in King Abdul-Aziz University,Jeddah (Saudi Arabia)

Academic advising, which plays a crucial role in higher education, is often ignored and not given its due importance. This paper is an attempt to make up for this attitude. It proposes a complete system for academic advising taking into account its' multifarious aspects. In the process, the paper draws heavily on the author's experience of organising academic advising in the College of Engineering, King Abdul-Aziz University, Jeddah, Saudi Arabia.     

氮肥种类与施量对油菜种子生育酚的影响(英文)

研究目的:生育酚是菜籽重要的品质指标,氮肥是影响作物生物学与籽粒产量最常用的肥料。这项研究旨在搞清楚氮肥种类与施量对油菜种子生育酚含量与组分的确切影响,以及这种影响在基因型之间的差异。创新要点:这篇论文研究了不同的氮肥种类(硝态氮与铵态氮)与低、中、高施用量对种子生育酚总量与组分的影响,并分析了其中的原因,为通过合理的氮肥施用方案配置,以达到最理想的菜籽生育酚含量或组分提供依据。研究方法:采用盆钵实验控制氮肥施量与流失的精准方法,五种基因型、二种氮肥种类、三档施量水平,三重复控制误差;尝试用气相色谱法检测菜籽生育酚含量的新方法。重要结论:尿素比硝酸氨更有利于菜籽总生育酚、阿尔法生育酚及伽马生育酚的有效形成;提高氮肥施量对于菜籽形成高含量的总生育酚与伽马生育酚非常有效,但对提高菜籽阿尔法生育酚含量的效果却不太明显。