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。     

苏轼的家世环境与其"隐"之情结探讨

关于苏轼有说不完的话题,原因在于苏轼开创了一种亦官亦隐的生活模式,成为后人追慕的典范,而其核心却是隐逸情结。此情结的形成原因是各种因素交互作用的结果,而他的家世环境是重要的因素之一。     

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。     

新疆民族问题的区域特征与西部大开发

民族问题是新疆在西部大开发中应该处理好的重大社会问题。为此，章从民族问题区域比较的新视角，比较全面地阐述了新疆民族问题的突出特点，进而对新疆在西部开发中有针对性地认识、思考和处理好民族问题进行了探讨。     

Analytic Solution to Nonlinear Dynamical Systemof Dragon Washbasin

Based on phase-plane orbit analysis, the mathematical model of piecewise-smooth systems of multidegree-of-freedom under the mode coordinate is established. Approximate analytical solution under the physical coordinate of multi-degree-of-freedom self-excited vibration induced by dry friction of piecewise-smooth nonlinear systems is derived by means of average method, the results of which agree with those of the numerical solution. An effective and reliable analytical method investigating piecewise-smooth nonlinear systems of multi-degree-of-freedom has been given. Furthermore, this paper qualitatively analyses the curves about stationary amplitude versus rubbing velocity of hands and versus natural frequency of hands, and about angular frequency versus rubbing velocity of hands. The results provide a theoretical basis for identifying parameters of the system and the analysis of steady region.     

仅发送者知道通道信息的可控概率隐形传态

采用推广测量法,在仅发送者Alice知道部分纠缠GHZ态通道信息的条件下,提出了实现可控概率隐形传态的方案。     

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.