A conceptualization of intended learning outcomes supporting self‐regulated learners in indicating learning paths

Intended learning outcomes (ILOs) indicate what learners will be able to achieve after they are taught. Traditionally, ILOs are expressed as plain text or unstructured documents. What if all ILOs of a specific course of study can be conceptualized through a structured diagrammatic technique? It was hypothesized that learners can benefit from this conceptualization in learning, especially in self‐regulated learning. The aim of this study was to investigate whether the ILOs represented in unstructured or structured formats can facilitate learners to identify learning paths. The results revealed that the mean ratings of all learning paths were statistically significantly higher with structured ILOs.     

基于视觉暗示的战争纪念建筑设计手法探究

当代建筑中，视觉暗示的设计手法对纪念建筑的营造有着至关重要的作用。现试图从建筑学的视角出发，以当代战争纪念建筑实际案例为研究对象，对战争纪念建筑的设计方法展开讨论。首先着重分析视觉暗示与格式塔心理学的关系，其次阐述视觉暗示给参观者心理带来的微妙变化，之后探讨视觉暗示对空间纪念效果造成的影响，最终归纳为可操作的设计策略：图形暗示、内容暗示、秩序暗示，并明确其如何相互影响。立足于格式塔心理学及心理暗示的理论基础，是对纪念建筑设计方法的补充，亦可为今后的战争纪念馆设计提供启示。     

适用于无线体域网的动态口令认证协议

无线体域网中传输的是与生命高度相关的敏感数据，身份认证是信息安全保护的第一道防线。现有的基于人体生物信息的身份认证方案存在信息难提取、偶然性大和误差性大的问题，基于传统密码学的认证方案需较大计算资源和能量消耗，并不适用于无线体域网环境。为此，在动态口令和非对称加密机制基础上，提出一种适用于无线体域网的动态口令双向认证轻量协议，并对其进行形式化分析。通过理论证明、SVO逻辑推理及SPIN模型检测得出：该协议满足双向认证，且能够抵御重放攻击、伪装攻击、拒绝服务器攻击和口令离线攻击，具有较高安全性。     

Matlab图形用户界面辅助《化学信息学》教学

化学信息学是一门利用信息学、计算机科学和技术来解决化学问题的学科。本文利用Matlab科学计算软件的图形用户界面(GUI)功能,通过分子模拟课堂教学的具体实例来展示图形用户界面在化学信息学课程辅助教学中的优点。交互式图形用户界面使得分子模拟过程直观可视化,通过理论与实践教学的结合有助于提高教学质量,激发学习兴趣。     

用短棒试件测试无烟煤准静态断裂韧度试验研究

根据国际岩石力学学会建议采用的岩石断裂韧度测定方法,用短棒试件在Instron 1342型电液伺服控制材料试验机上测定了无烟煤准静态I型断裂韧度,其断裂韧度值在位移速率较低时提高较大,但随位移速率的提高有逐渐趋于稳定的趋势。从载荷-COD曲线图中分析了无烟煤断裂时,载荷出现跳动的原因,根据载荷跳动情况可以确定三角形韧带开始起裂时间。根据计算结果得出:试件加工几何上的误差对无烟煤断裂韧度值影响不大,造成的误差最大只有2.4%;但对弹性模量值的影响较大,造成最大的误差达到13.3%,同时用图解法得到了无烟煤的非线性度大于0.4。     

改进的库尔曼图解法及其在土压力计算中的应用

对库尔曼图解法进行了改进 ,通过巧妙的作图 ,结合几何和物理两方面的关系导出了库仑主动土压力公式的另外一种表达形式 ,并由此得出了一种新的土压力图解法。和原库尔曼图解法相比 ,改进的方法计算量大大减少 ,作图更加方便 ,所得结果更加精确。算例表明 ,该方法所得的结果和库仑主动土压力理论公式所得到的结果吻合得非常好     

海面SAR时域回波信号可视化仿真计算

利用计算机来模拟合成孔径雷达回波信号是雷达系统仿真中重要的一部分。借助雷达目标的高频电磁散射特性,运用图形电磁计算方法,开发了可快速、有效地获取合成孔径雷达回波信号的方法,可为合成孔径雷达成像提供原始的雷达回波数据。以起浪海面为目标实例,利用海浪频谱构建海面的几何模型,针对此海面模型,运用高频散射机理,实时可视化地计算其电磁波回波场强以及模拟出时域回波信号。利用条带式合成孔径雷达成像方法,通过该回波信号仿真出海浪面的合成孔径图像,验证了该方法有效性。     

Differential graphical games for H∞ control of linear heterogeneous multiagent systems

Differential graphical games have been introduced in the literature to solve state synchronization problem for linear homogeneous agents. When the agents are heterogeneous, the previous notion of graphical games cannot be used anymore and a new definition is required. In this paper, we define a novel concept of differential graphical games for linear heterogeneous agents subject to external unmodeled disturbances, which contain the previously introduced graphical game for homogeneous agents as a special case. Using our new formulation, we can solve both the output regulation and H_∞ output regulation problems. Our graphical game framework yields coupled Hamilton‐Jacobi‐Bellman equations, which are, in general, impossible to solve analytically. Therefore, we propose a new actor‐critic algorithm to solve these coupled equations numerically in real time. Moreover, we find an explicit upper bound for the overall ‐gain of the output synchronization error with respect to disturbance. We demonstrate our developments by a simulation example.     

Multiple material domain‐based computational tools for ease assessment of modal parameter in photonic crystal fibers

We report here the development of two computational tools PCFPS (Photonic Crystal Fiber Parameter Study) and PCFPA (Photonic Crystal Fiber Parameter Analysis), equipped with graphical user interface (GUI) for modeling of photonic crystal fiber. The tools are based on different structural parameters, and they provide characteristic analysis of the modal parameters from the structural parameters. The main feature of PCFPS is that it enables the user to find out the values of each defining modal parameter that has an immense contribution towards the manufacture of photonic crystal fiber. Additionally, PCFPA allows the user to observe the variation in the modal parameters with respect to the changes in structural parameters (such as d, Λ, d/Λ, and λ/>Λ). Besides their ease of use, these two schemes have high computational precision and adaptability, giving a novel platform to optical engineers to modulate the microstructured fibers according to their requirement.