经济管理类专业统计学课程教学改革研究

统计学是一门实践性和应用性很强的学科,是一门方法论科学,是高校经济管理类专业必修的专业基础课程。在新形势下,其教学面临着诸多挑战,因此对统计学教学进行改革极为迫切。本文分别从教师和学生角度,依据学生学习情况、教学内容、教学方法、教学手段、考核方式等方面对经济管理类专业统计学课程教学改革提出了思路和建议。     

经管类专业《管理信息系统》教学模型研究

管理信息系统是国内外经济管理类专业必修的一门核心课程。本文对课程的教学目标、教学内容和教学方法进行了深入分析,提出了适用于经济管理类专业学生的MIS课程教学模型AU—WAP—REC,教学实践表明该模型的应用对课程教学起到了较大的促进作用。     

如何提高微积分课程的教学质量

微积分是高等院校经济、管理类专业非常重要的一门基础课,也是学生感到难学的一门课程。本文从教学的对象、教学的内容、教学的方式、教学者本身四方面探讨如何提高这门课的教学质量。     

统计学课程思政实践探究

统计学是高校统计类和经济管理类专业的一门基础课程,该课程主要讨论收集、整理和分析数据的基本方法,在实际生活中有广泛的应用。该文以统计学课程为对象,从统计学学科历史、课程内容和课程教学手段三方面入手,深入探究在统计学课程中融入课程思政的方法,以提高统计学课程的育人能力。     

浅谈《经济数学——微积分》课程教学

《经济数学基础》是经济管理类专业的重要基础课，对学生素质和能力的培养起着举足轻重的作用。本文从教学内容、教学方法、教学形式和考试制度几个方面对《经济数学基础一微积分》这门课程的教学进行了探讨。     

《基础会计学》课程教学改革的探索与实践

基础会计学是经济管理类专业的一门重要的基础课程，通过对课程的教学内容，教学方法、教学手段、考核方法等进行改革，达到提高教学效果，培养和增强学生的表达能力、思考与分析问题的能力、实践应用能力的目的。     

浅谈《经济数学——微积分》课程教学

《经济数学基础》是经济管理类专业的重要基础课,对学生素质和能力的培养起着举足轻重的作用.本文从教学内容、教学方法、教学形式和考试制度几个方面对《经济数学基础-微积分》这门课程的教学进行了探讨.     

普通本科院校《国际金融》课程实践教学的思考

《国际金融》课程是一门理论性与实践性并重的经济管理类专业的核心课程。学生实践能力的提高是当今社会对应用型人才提出的一个迫切要求,因此加强实践性教学环节,提高专业化能力的培养是普通本科院校《国际金融》课程教学改革的重要内容之一。     

建构主义在线性代数中的运用

线性代数课程是高等院校本科生的一门公共基础课,使很多工科类和经济管理类专业后续课程的基础．建构主义教学思想是以学生为主体的教学思想,本文分析了线性代数的教学现况,并讨论了建构主义思想在线性代数教学中如何运用,为线性代数的教学改革提供了新思路。     

基于能力培养的管理会计模块化教学创新研究

管理会计是高校财经类专业学生必修的一门核心课程,随着经济和信息技术的发展,管理会计的地位日益显著。在分析目前高校管理会计教学存在问题的基础上,结合相关理论,从能力培养的角度设计了模块化教学方案,旨在促进管理会计教学水平提升。     

基于企业竞争战略的企业性质研究

基于企业竞争战略的企业性质研究目前有三种代表性的观点第一,企业是价值活动的集合体;第二,企业是核心能力的集合体;第三,企业是战略资源的集合体。本文认为,企业是顾客需求的集合体,顾客是企业持续竞争优势的来源。     

An improved lock detector for phase-locked communication receivers

A quadrature lock detector is incorporated in almost all coherent radio communication receivers. This commonly-used receiver subsystem is comprised of a quadrature phase detector that drives a low-pass filter, the output of which is subjected to a user-specified threshold to make a lock/unlock decision. Signal acquisition and phase lock are declared if an above threshold condition is observed. Unfortunately, this method of lock detection may yield a positive lock indication when the receiver is false locked; i.e., a classical quadrature lock detector may generate a false-positive lock indication. This tendency to produce an incorrect lock indication can be reduced significantly by using the new lock detector algorithm that is described here. Compared to the classical quadrature lock detector, the new lock detector is better able to differentiate between true phase lock and anomalous false lock. The classical quadrature lock detector is a simple, first-order approximation of the new lock detector algorithm. That is, the new lock detector algorithm consists of a classical quadrature detector that is augmented by a correction term.     

Uncertainty and the inconvenient facts of diagnosis

One common contemporary usage of the term “diagnostic uncertainty” is to refer to cases for which a diagnosis is not, or cannot, be applied to the presenting case. This is a paradoxical usage, as the absence of diagnosis is often as close to a certainty as can be a human judgement. What makes this sociologically interesting is that it represents an “epistemic defence,” or a means of accounting for a failure of medicine’s explanatory system. This system is based on diagnosis, or the classification of individual complaints into recognizable diagnostic categories. Diagnosis is pivotal to medicine’s epistemic setting, for it purports to explain illness via diagnosis, and yet is not always able to do so. This essay reviews this paradoxical use, and juxtaposes it to historical explanations for non-diagnosable illnesses. It demonstrates how representing non-diagnosis as uncertainty protects the epistemic setting by positioning the failure to locate a diagnosis in the individual, rather than in the medical paradigm.     

Projects as communicating systems: Creating a culture of innovation and performance

Although often downplayed and instrumental, there is evidence that communication in projects is essential in achieving value creation. Our main interest in this paper is on temporary continuity, a situation where the temporary becomes a permanent condition in social systems. The question that we have address is: What characterizes project communication in a situation with temporary continuity?We argue for the need to transform communication processes into communication capabilities. In a situation with temporary continuity, there is a need to connect to a large number of value-creating processes, and communicating capabilities need to be a part of a communication system, where the aim is to bind together value-creating processes and communication capabilities. We construct a viable system consisting of five sub-systems. To become a viable system, projects in the form of temporary continuity, must handle the potential conflict between a culture of performance and a culture of innovation. This involves developing social mechanisms for coordination and interaction, with a focus on developing communication capabilities, in parallel with focusing on all of the five value-creation processes.     

基于点处理的图像脉冲噪声滤除方法研究

在分析含噪图像恢复方法和脉冲噪声概率密度函数的基础上,提出了一种基于点处理理论的脉;中噪声污染图像的恢复算法。该算法依次扫描图像的像素点,判断当前的像素点是否为脉冲噪声数据点,如果为噪声点,则计算空域滤波器的输出结果,并替代该像素点的值;否则,该像素点的值保持不变。实验结果表明,该方法基于像素点的空域处理,具有无排序操作、算法执行速度快和保持图像细节的优点。     

我的课堂我做主——语文课走出“教学教科书”的时代

语文课是充满生机和活力的课堂。语文课往往并不呈现出一种静态的知识体系,而是与师生一起处于一种变动的关系之中。语文课是预设与生成的统一。一节好的语文课应该更重视生成。叶圣陶先生说：＂语文教本只是些例子。＂这就对语文教师提出了更高的要求,它要求教师不仅是语文教科书的执行者,也应该是教科书的改造者、创新者。对于课堂的主人——学生来说,教科书也仅仅是有待激活的原声材料,它要在教师的引领和学生的理解中生成符合学生认知规律的知识。只有通过师生的感悟、体验、理解,教科书才能发挥它内在的精神意蕴和包含的文化精神。     

洛特卡参数的新估计法

洛特卡定律是文献计量学的重要理论基础,是文献计量学的三大定律之一。借助它人们可以了解作者发文的结构。广义洛特卡定律是含约束条件的模型,它的参数估计较为复杂,帕欧提出了近似估计法,但其法仍较为复杂,且参数估计方法不科学。为了科学地估计参数本文在帕欧估计结果的基础上,通过回归法给出了更为简单、更为科学的估计法。     

Natural surface design for sliding mode control with multiple discontinuous inputs

It is well known that sliding mode control is based on the definition of an invariant manifold, where the system dynamics are forced to in a finite time. Such a manifold is somewhat arbitrarily defined, as long as the system dynamics are stable on it. Computational and control effort may vary depending on selected manifold. Obviously, if a system has naturally acceptable stable dynamics around a desired equilibrium point, no control is needed unless uncertainties or disturbances are present. It would be desirable that if such a system had uncertainties or disturbances, the control effort be designed only to overcome the effect of such factors. For a system with first order dynamics and affine control input, designing a sliding mode control overcoming only such uncertainties or disturbances is a trivial task. When a higher order dynamics system is involved, unit control may be used, where the input control signals are not discontinuous, but when only discontinuous control inputs are available, a design approach is not readily available. In this paper, taking advantage of the natural stable dynamics of a system, a sliding mode control approach is introduced for designing multiple discontinuous control inputs, where the control effort overcomes only uncertainties, disturbances or unstable dynamics. Two illustrative examples are given in order to show the feasibility of the method.     

粒子群算法及其哲学启示

粒子群优化（PSO）算法是一种模拟自然生物群体（swarm）行为的优化技术。PSO算法源于对鸟群觅食行为的研究,该算法简单易实现,可调参数少,已得到广泛研究和应用。PSO算法不仅仅是种算法,更是一种学习和思维的创新,体现出学科之间交互所发生的一些突破。它不但是计算机理论上极大的理论创新,而且在哲学上也具有丰富的内涵。对此进行了论述。     

浅谈从模具的冲压特性来选择模具

在目前激烈的市场竞争中,产品投入市场的迟早,往往是决定产品占领市场份额的关键。而模具是一种高质量、高效率的生产工具,它在新产品开发中扮演着重要的角色。如何根据产品零部件的工艺特性来正确地选择加工方法和模具种类,是我们每个设计人员经常遇到的问题。如在确保质量的前提下,尽量减少周转、装夹工序,已是我们设计制造的发展方向。在工件加工时,减少一道加工工序就减少了一次周转,降低了磕碰的概率;省去了一次装夹校正,增加了生产效率,减少了一项装夹误差,提高了加工精度。因此选择适当,既能保证产品质量,又能提高生产效率,从而使企业获得更高的经济效益。