慢性运动性疲劳状态下心脏心钠素内分泌功能的实验研究

采用递增负荷跑台练习,建立运动性疲劳模型;应用血浆放射免疫测定、免疫组织化学、计算机图像分析等方法,观察慢性运动性疲劳状态下血浆心钠含量及心肌组织心钠素表达的改变.结果表明,慢性运动性疲劳可使心脏心钠素内分泌功能降低,表现为血浆心钠素含量和心肌组织心钠素表达减少,不利于运动应激中心脏内分泌功能的发挥.     

国家精品课程与麻省理工学院开放课程的比较与思考

本文主要从网络课程的倡导者、设计、开发、管理、教学实践和评价等方面对美国麻省理工学院开放课程与我国精品课程进行比较分析。据此对我国的精品课程走出既有效率又有质量的课程建设之路提出了多层面的思考。     

产品开发中企业进行虚拟客户整合的动因研究

从环境不确定性理论、交易成本理论、企业能力理论的角度,对产品开发中企业进行虚拟客户整合的动因进行理论分析;然后通过问卷调查,运用描述性统计得出企业的整合动因均值,并对其重要性进行排名,结果发现,企业的整合动因依次为降低开发成本、增加竞争力、降低企业研发新技术或进入新市场的风险、加快开发速度、制定产品与服务的规格与标准、利用客户资源进行技术交流、互相学习共同创造独自不能完成的新技术新产品。最后,指出未来的研究方向。     

从睡虎地秦简看汉字基础构形元素的演化

不同时段，汉字基础构形元素的分布情况是不一样的。作为文字系统的基本构形材料，其自殷商时期开始已经发生内部调整。睡虎地秦简文字继承了旧传统的正体，其大部分的基础构形元素承袭西周金文而来，并在其文字系统内部扮演着重要角色，保持了汉字的传承性和稳定性。与此同时，该文字的基础构形元素也发生着一些变化，并影响至今。     

Finite-time control for soft landing on an asteroid based on line-of-sight angle

Motivated by the requirement for safe and pinpoint soft landing in future asteroids missions, a soft landing control method based on finite-time control (FTC) technique is developed in this paper. Firstly, in order to utilize the design philosophy of cascaded system, the landing error dynamics of asteroid probe are divided into two subsystems, including a position error subsystem (PES) and a line-of-sight angle error subsystem (LOSAES). Secondly, homogeneous system theory is employed to design the control law for LOSAES such that the states of LOSAES will be stabilized to the origin in finite time. For the reduced PES subsystem, a FTC law is designed such that the rest of states will converge to zero in finite time. Strict analysis shows that the whole system satisfies the finite time stability. Simulation results demonstrate that the proposed method provides faster convergence rates and better disturbance rejection properties compared with the traditional asymptotically stable control (ASC) method.     

中学物理新课程教学理论与学生创新能力的培养

本文结合新课程教学理论与物理教学的发展，指出在物理教学中应加强学生创新能力的培养，并结合物理新教材的实验教学，论述了中学物理创新教育的理论和方法，以及培养学生的创新能力的途径。     

Particles in a Box with One Sticky Wall: From ODE to PDE

Abstract

We present noncompetitive adsorption as “particles in a box with one sticky wall.” We start with a general model that can be modeled as a simple ordinary differential equation (ODE). To verify the ODE students run a computer simulation. The ODE’s solution imperfectly fits the simulation’s data. This leads to the diffusion partial differential equation. We show how to determine the diffusion constant from theory; how to determine how many terms in the Fourier series solution need to be summed; and the use of nonlinear regression. As a bonus, the physics of the model will lead us to a series representation of π.     

Faculty Liaisons: an embedded approach for enriching teaching and learning in higher education

This paper explores the experiences of a group of academic developers who support educational development work as Faculty Liaisons at a large, research-intensive university. These academic developers inhabit complex ‘third spaces’, providing support through an embedded partnership relationship that requires lateral movement across functional and organizational boundaries to create new professional spaces, knowledge, and relationships. The authors utilize narrative inquiry and auto-ethnographic approaches to present an interpretive qualitative analysis of their experiences supporting Faculty and University projects across complex and evolving organizational boundaries. From this analysis, they highlight key roles and responsibilities associated with their blended context and identify challenges that academic developers who occupy third spaces within academic organizations face as they negotiate competing interests, identities, and requirements associated with the diverse range of their projects and the blended experience of working in scholarly and administrative, central- and Faculty-based roles. The lessons they have learned from these experiences will be of particular interest to academic developers who are experiencing the flux of change within higher education settings that are impacting teaching and learning practices both for faculty in the classroom and for those across the institution who support them.     

Hg~（2＋）胁迫培养对水生植物根际微生物的影响

采用水培方法,在实验室条件下,选择不同浓度的Hg2＋对大薸（Pistiastratiote）、慈姑（Sagittaria sagittifolia L）和穗状狐尾藻（Myriophyllum spicatum Linn.）进行胁迫培养,通过测定三种水生植物根系的微生物区系及与氮循环细菌的数量变化,分析三种水生植物根际微生物对重金属Hg2＋的耐受性,微生物区系结构和与氮循环有关的细菌的数量变化。结果发现,Hg2＋胁迫改变了水生植物根系微环境,对微生物区系结构产生明显的影响;氮循环细菌生理类群的数量随着外源重金属Hg2＋浓度变化表现出一定的特殊性和复杂性。     

“五育融合”的时代价值及其教学实现

“五育融合”是德智体美劳“五育”在教育教学中的整体生成,是“五育并举”政策推动下的理论提升。对学生层面育人价值、学科层面教学价值以及社会层面发展价值的追求,构建起了“五育融合”的时代价值体系。促进“五育融合”的价值在教学中实现,需要从目标、内容、主体、环境四个方面推动由观念到行为的整体转变。它具体包括从国家、地方、学校三方着力,树立起正确的五育融通式教学基本理念;把握五育融通式课程结构体系的价值定位与侧重点,形成纵横交错的立体多维结构;发展好学校管理者、教师和学生等多元主体的融合育人能力;注重学校能力建设、搭建五育融合效果评价体系和采用五育融通式教学实践策略,营造出良好的五育融通式教学生态环境。