翻转课堂在"电工技术基础"课程的实践探究

本文研究了翻转课堂在"电工技术基础"课程中的应用,从课程的特点、课前的自主学习和课间的知识内化等方面研究了翻转课堂的实施方案,并对翻转课堂的教学效果进行了满意度调查.结果表明,采用翻转课堂的教学形式能有效地提高学生自主学习的能力和学习效率,更好地掌握学习的内容,也受到绝大部分的学生的欢迎.     

“电力工程基础”翻转课堂教学的实施与思考

本文从研究科学合理的划分课堂教学内容和自学内容入手,提出通过合理设计课前预习、课中讲授与讨论、课后练习与深化、考核方式,进行“电力工程基础”翻转课堂教改的组织实施,达到提高学生学习兴趣和课程教学质量的目的,并对如何更有效的开展翻转课堂教学改革进行了思考.学生评教数据表明了翻转课堂改革措施在课程教学应用中的有效性.     

基于翻转课堂的计算机网络课程建设

翻转课堂是现代教育理念发展的产物,它符合素质教育的要求,因此在计算机网络课程中实施翻转课堂有利于实现课程的目标,提高课程教学效果。文章阐述了翻转课堂的内涵和特点,分析了翻转课堂在计算机网络课程教学中的优势和局限性,并设计出基于翻转课堂的计算机网络课程构建步骤。     

翻转课堂在“MATLAB与通信系统仿真”教学中的实践

对于“Matlab与通信系统仿真”课程的教学现状,包括课堂教学学时有限,学生基础层次不齐,且被动式学习不利于培养学生仿真思路,本文探讨了如何将翻转课堂应用于该课程的教学过程中。本文具体阐述了针对该课程的翻转课堂教学模式构建与实施,包括课前学习,课堂以及实验教学,课后反馈以及考核评价。根据学生期末上机成绩分布以及问卷调查,翻转课堂教学模式应用于“Matlab与通信系统仿真”课程能够获得较好的教学效果。     

浅析MOOC与翻转课堂在“翻译技术实践”课程中的应用

MOOC与翻转课堂借力于数字化创新,颠覆了传统的教学模式,正在重新构筑课堂内外的学习价值,引起了国内外研究者的广泛关注。北京大学语言信息工程系“翻译技术实践”课程以北大MOOC建设为契机,采用MOOC与翻转课堂混合的教学模式,拆分课程目标,重构课堂内外的教学活动,以此提升课程教学效率,深化学生对翻译技术相关知识的内化与运用。本文探讨了MOOC教学与翻转课堂之间的衔接问题,构建出所谓的“递进式翻转教学”模式,这不但提升了翻译技术教学的质量,也是对SPOC/翻转课堂教学方法的创新探索。     

“人工智能基础”课程教学改革与实践[1]

针对“人工智能基础”课程前沿性、实践性、探索性强的特点,尝试教学改革与实践。通过精心安排教学内容,符合认知规律的课堂设计,有机融入前沿案例和课程思政内容,形成了从课前调研到课堂讲授、再到课后反馈和持续改进的良性教学闭环,利用启发式、研讨式和翻转课堂等教学方法激发学生学习热情,提升课程教学效果。     

《HTML+CSS》翻转课堂实践与研究

翻转课堂是一种通过学生在课前准备,课外学习,课堂上老师与学生、学生与学生互相交流讨论而完成学习任务的新型教学模式;在充分体现"以学生为中心"的翻转课堂模式视角下,文章为大家呈现《HTML+CSS》课程中部分内容的翻转课堂实践教学过程,详细列出了课前任务设计和课上任务实施,分析了教学实践研究结果,并提出了研究过程中遇到的问题及解决办法。     

基于“实践问题”的“电子电路基础”翻转课堂建设

以提高学生能力为主线的翻转课堂,对促进我国的课程教学改革向纵深的方向发展有非常积极的作用,但同时翻转课堂也对教师和学生提出了更高的要求。本文以电子电路基础课程为例,展示了理论和实践结合类课程的翻转课堂的设计思路和教学案例,为翻转课堂的内容建设提供了一种思路。实施效果表明,基于实践内容研讨的翻转课堂激发了学生的学习兴趣,提高了翻转课堂中学生的参与积极性,提升了学生发现、分析和解决问题的能力,起到了良好的教学效果。     

计算机应用基础课程的翻转教学模式分析

阐述翻转课堂的特点,计算机应用基础课程教学中的问题,翻转课堂在计算机应用基础课程教学中的应用,包括从任务出发、设计微课内容,利用微课教学进行课前预习,教学成果分析。     

以学生为中心的“数字信号处理”教学探索

针对当前教学存在的问题，充分利用线上资源和线下翻转课堂的方式，对传统教学模式进行改革。线上通过雨课堂随机点名、弹幕和闯关题的设置，让学生的注意力关注在课堂；通过腾讯会议实时语音通话，随时和学生互动，提升学习兴趣；线下通过翻转课堂，让学生重构知识图谱，排除畏难心理。实施效果表明该教学模式实现了“以教为中心”向“以学为中心”的转变，可为相关课程提供有益借鉴。     

A Fast Algorithm for Wave Propagation from a Plane or a Cylindrical Surface

The newly developed Taylor-Interpolation-FFT (TI-FFT) algorithm dramatically increases the computational speeds for millimeter wave propagation from a planar (cylindrical) surface onto a “quasi-planar” (“quasi-cylindrical”) surface. Two different scenarios are considered in this article: the planar TI-FFT is for the computation of the wave propagation from a plane onto a “quasi-planar” surface and the cylindrical TI-FFT is for the computation of wave propagation from a cylindrical surface onto a “quasi-cylindrical” surface. Due to the use of the FFT, the TI-FFT algorithm has a computational complexity of O(N ²?log₂? N ²) for an N?×?N computational grid, instead of N ⁴ for the direct integration method. The TI-FFT algorithm has a low sampling rate according to the Nyquist sampling theorem. The algorithm has accuracy down to ?80 dB and it works particularly well for narrow-band fields and “quasi-planar” (“quasi-cylindrical”) surfaces.     

Private Justice: Losing Our Day in Court

In the early days of the dispute resolution movement—the ‘80s and ‘90s—the concern was often expressed that we were developing a system of “second‐class justice” for those who couldn't afford the courts. The wealthy, of course, would continue to have access to the “first‐class justice” that the public courts provided.     

单片机“案例教学”模式改革与探索

针对当前高校加强工程教育培养体系建设,结合大连大学教学计划调整方案,对单片机课程提出“案例教学”模式改革。使学生“学中做,做中学”,边学边练,以提高学生动手实践能力,增强创新意识,提高课程教学效果。     

Internet et performance de l’entreprise: Étude de l’organisation industrielle de 104PME en Loire-Atlantique

What is the influence between Internet and the enterprise performance? This study presents the relationship between the Internet applications (web, business intelligence, e-commerce, internal communication, cross-companies cooperation) and growth and profit of Small and Medium Enterprises (SMEs). If a direct “impact” is tested, an indirect relationship is nevertheless submitted to a test through intermediary variables i.e. industrial organization according to Pavitt (1984) and the structure. The study of 104SMEs in Loire-Atlantique (France) did not find any direct “impact” of Internet applications on enterprise performance. On the other hand, an indirect influence was found, especially through the specific use of Internet bySMEs belonging to “mass production”, “specialized supplier” and “high tech” industries.     

“大学物理”实验课程混合教学模式的应用

针对新型冠状病毒肺炎疫情中“停课不停学”的要求,文章以“大学物理”实验课程为例,从课前预习、课堂教学、课后书写实验报告为例分析了传统教学模式存在的问题,并探讨了“大学物理”实验课程线上线下教学混合模式的应用。线上线下混合教学模式对于培养学生自主学习能力,提高“大学物理”实验课程的教学质量都是大有益处的。     

3g medicine — Removing the wires of telemedicine

Maturing telemedicine technologies, struggling mobile networking revenues and increased personal healthcare awareness have provided the foundations for a new market niche that of “3g Medicine”. During the last 5 years telemedicine (based on internet and web technologies) is becoming a reality both in terms of developing technologies and supportive legislation. Combined with an increased awareness not only for outpatients but also for the “well-worried” (healthy and health conscious) 3g Medicine Services will play an important role in personal healthcare management. This paper presents a categorization of 3g Medicine services and the need to integrate technologies.     

Li‐Doped Cr2MnO4: A New p‐Type Transparent Conducting Oxide by Computational Materials Design

To accelerate the design and discovery of novel functional materials, here, p‐type transparent conducting oxides, an inverse design approach is formulated, integrating three steps: i) articulating the target properties and selecting an initial pool of candidates based on “design principles”, ii) screening this initial pool by calculating the “selection metrics” for each member, and iii) laboratory realization and more‐detailed theoretical validation of the remaining “best‐of‐class” materials. Following a design principle that suggests using d5⁵ cations for good p‐type conductivity in oxides, the Inverse Design approach is applied to the class of ternary Mn(II) oxides, which are usually considered to be insulating materials. As a result, Cr₂MnO₄ is identified as an oxide closely following “selection metrics” of thermodynamic stability, wide‐gap, p‐type dopability, and band‐conduction mechanism for holes (no hole self‐trapping). Lacking an intrinsic hole‐producing acceptor defect, Li is further identified as a suitable dopant. Bulk synthesis of Li‐doped Cr₂MnO₄ exhibits at least five orders of magnitude enhancement of the hole conductivity compared to undoped samples. This novel approach of stating functionality first, then theoretically searching for candidates that merits synthesis and characterization, promises to replace the more traditional non‐systematic approach for the discovery of advanced functional materials.     

Adaptive Lattice Filters for Systems of Space-Time Processing of Non-Stationary Gaussian Processes

Adaptive systems protecting pulse radars from non-stationary in time (range) clutter echoes are usually tuned using training vectors composed of complex amplitudes of input signals and comprising a finite-length “sliding window” of data. From any current range gate to a subsequent one, a training sample is partially updated (or modified) by means of excluding the “old” training vectors (correspond to the current range gate) and including the “new” ones (correspond to the next range gate). As a consequence, respective estimates of adaptive system parameters are corrected according to a modified sample correlation matrix (CM), which is typically a sum of an initialCMand a modifying matrix of rank K ≥ 1. In this case it is possible to avoid re-computing these parameters based on a new training sample of full size and, instead of this, we correct them in an “economical” way employing K-rank modification of a matrix inverse to the CM estimate.This paper is devoted to comparative analysis of various (K ≥ 1)-rank modification algorithms that correct the parameters of adaptive lattice filters (ALF). Main attention is paid to synthesis as well as theoretical and experimental study of algorithms of direct (K > 1)-rank modification of the ALF parameters. These algorithms attain the said objective omitting the K-fold application of known rank-one (K = 1) modification algorithms. We also synthesize a combined algorithm (CA) of (K ≥ 1)-rank modification of the ALF parameters that is more computationally simple and more numerically robust compared to known algorithms. The ALF employing the CA can serve as an effective tool for solving various tasks of space-time adaptive signal processing in pulse radars of different purpose.     

Bandwidth sharing with heterogeneous flow sizes

We consider a system with two heterogeneous traffic classes. The users from both classes randomly generate service requests, one class having light-tailed properties, the other one exhibiting heavy-tailed characteristics. The heterogeneity in service requirements reflects the extreme variability in flow sizes observed in the Internet, with a vast majority of small transfers (“mice”) and a limited number of exceptionally large flows (“elephants”). The active traffic flows share the available bandwidth in a Processor-Sharing (ps) fashion. Theps discipline has emerged as a natural paradigm for modeling the flow-level performance of band-width-sharing protocols liketcp. The number of simultaneously active traffic flows is limited by a threshold on the maximum system occupancy. We obtain the exact asymptotics of the transfer delays incurred by the users from the light-tailed class. The results show that the threshold mechanism significantly reduces the detrimental performance impact of the heavy-tailed class.     

New results on serial concatenated and accumulated-convolutional turbo code performance

Previous methods for analyzing serial concatenated turbo codes employing union error bounds are extended to determine the complete output weight enumeration function of the code; this provides the opportunity to employ a more refined bound due to Polytrev, with considerably improved results limited, however, to block lengths of about 256 bits by computational constraints. The method is then applied to a new class of “accumulated-convolutional” codes, which is a simple special subclass of serial concatenated codes inspired by the “repeat-accumulate” codes of Divsalar et al. Performance appears to be superior to that of conventional codes and results are obtained for much longer block lengths, with impressive results in regions approaching channel capacity.