上升气泡内气溶胶沉降机理研究

气溶胶池洗过滤是反应堆严重事故中去除放射性源项的重要手段。本文以严重事故条件下上升气泡中气溶胶的滞留过程为背景，设计搭建了可视化单气泡鼓泡实验装置。通过该装置研究了气溶胶在上升气泡中的沉降效率，并与MELCOR中的气溶胶沉降模型计算结果进行了对比。结果表明，气溶胶沉降效率对气泡尺寸的变化较为敏感，当气体流量大于0.1 L/min时，气泡等效直径迅速增加，相应的气溶胶沉降效率快速降低；与MELCOR模型计算结果的对比表明，两者在总体趋势上呈现出较好的一致性，但计算结果低估了液相对气溶胶的实际去除能力，导致这种偏差的主要原因是气泡在上升过程中存在无规则的晃动以及气液界面的波动。     

优化GD-模糊规则的滑坡预报模型研究

为了提高滑坡灾害预报准确率，改善传统的滑坡监测和预报中存在的参数选取困难及模糊控制系统作为预报模型精确度不高的问题，首先采用山体结构稳定性分析法进行滑坡灾害参数的选取，得出降雨量、含水率、土压力及岩土表面位移增量作为预报参数的结论；其次将选取的参数作为模糊系统的输入，建立滑坡灾害发生概率模型，并引入优化的GD算法修正预报模型中的动态参数，使模糊控制模型具有自适应性；同时与未优化的模糊控制模型以及单独模糊控制模型进行仿真对比，仿真结果表明，该控制算法收敛速度快，具有很好的收敛性；最后将该模型在某滑坡重点灾区实验区进行实验测试，实验结果显示该模型具有较好的收敛性，且预报精度达到90%。     

Boccia game simulator: Serious game adapted for people with disabilities

Integration in the world of sport is one way for individuals with disabilities or motor disorders to feel more socially integrated, independent, and confident. Boccia is a Paralympic sport, which is increasingly getting more attention around the world. These facts have contributed to the objectives of this work. Including it in the serious games category enables to develop and rehabilitate the cognitive capabilities. The main focus was BC3 classification athletes (users with limited motor characteristics that require the use of an assistive device—a ramp, in this case). This paper describes a realistic Boccia game simulator adapted for people with disabilities that integrates a set of features that includes real physics and social features. These features can be used to enhance the interest of nonpractitioners of the sport and to improve the training conditions. The official Boccia regulation was added to the design of the simulator. The usability and approximation to the reality of the simulator were tested and validated based on the tests performed and data collected via a survey of users with no motor or psychological disorders. Realism and usability rating was almost excellent, and good results were achieved at the assessment of the game experience.     

工程物探在某水泥厂滑坡地质灾害调查中的应用*

利用地球物理的方法来探测地层、岩性、构造等地质问题,称为地球物理勘探。本文结合中材国际总承包工程,详细介绍了工程物探(高密度电法)在石灰石输送廊道的滑坡地质灾害调查中的应用,通过地质调查并结合物探测试成果的综合分析,为工程设计人员对滑坡治理提供准确的地层地貌、岩性、地质构造及下一步工作的建议。     

Supporting primary students' learning of fraction conceptual knowledge through digital games

With the advent of mobile technologies, well-designed fraction apps can be used to help children gain fraction knowledge, a challenging topic for both teachers and students. The present pilot study adopted a quasi-experimental design to investigate whether children can learn fraction concepts equally well if half of the lesson time (20 min) is replaced with game-based learning. Keeping the total lesson time (40 min) identical, the control group (N = 33) received traditional instruction, and the experimental group (N = 32) was presented with a blended learning approach spending half of the class time (20 min) playing tablet-based fraction games, where each of the learners had their own tablet. The results suggested that in the posttest, the experimental group achieved similar learning gains to the control group and appear to have achieved better performance in the transfer test than the control group. This paper also discusses the efficiency of game-based learning, the mechanism of how fraction games might enhance learning, and the potential of integrating game-based learning in educational settings.     

面向巴渝传统建筑文化的严肃游戏开发研究及 设计实践

通过对巴渝传统建筑文化进行严肃游戏开发及设计实践，实现传统文化的保护与传承。对目前巴渝传统建筑文化的保护现状进行调查研究，分析严肃游戏对传承巴渝传统建筑文化的适用性、有效性与独特优势，提出巴渝传统建筑严肃游戏的开发策略、设计程序与设计方法。基于严肃游戏理念设计桌面棋牌类游戏“渝筑”，完成游戏定位、游戏规则、游戏逻辑设计及相应的视觉设计，为巴渝传统建筑文化的活化创新应用提供新思路。     

基于多种评价方法的昭君村次级滑坡稳定性评价

为提高昭君村次级滑坡稳定性评价的精确性,同时运用模糊数学法和极限平衡法中的传递系数法对昭君村次级滑坡的稳定性进行评价,并与实际测量情况进行对比。结果表明,两种方法得到的昭君村次级滑坡稳定性评价结果与现场地质调查结果基本相符,滑坡整体处于欠稳定状态,且结合两种方法进行评价使得评价结果更为合理。研究成果可为类似滑坡稳定性评价提供参考。     

山西省地质灾害控灾因素分析

地形地貌是地质灾害发生和活动的基础，一定程度上决定了地质灾害发生的类型、数量、密度和规模。山西地处黄土高原东部，地形高差大、地质条件复杂、水土流失严重，极易形成崩塌、滑坡、泥石流等地质灾害，地质灾害种类多、分布广、数量大。通过对山西省地质灾害发生特点和规律的研究，发现山西省地质灾害的主要控灾因素是地貌、年均降雨量和坡度。在不同的地貌单元内，黄土地貌是崩塌和泥石流等地质灾害的高发区，降雨是山西地质灾害的重要的诱发因素，区域地质灾害密度与区域年均雨量关系密切。全省年均降雨量低于400 mm和高于800 mm的地区基本不发生地质灾害；年均降雨量在450~600 mm地区最易发生地质灾害，其中年均降雨量在500~600 mm地区最易发生崩塌和滑坡灾害。地形坡度和崩塌呈明显的相关性，是影响崩塌发生的最主要因素。40°~50°坡角度是大型滑坡的高发区；当坡度大于50°后，大型崩塌的数量随着坡度的增大呈指数式增加。研究对山西省地质灾害的防治具有一定的指导意义。     

某水电站古滑坡体滑速涌浪分析

某水电站古滑坡体位于库首右岸的峡谷进口段,总方量约1 327×10~4 m~3,历史上该滑坡体曾多次发生滑动,目前处于临界稳定状态。古滑坡体下游侧边缘距离水电站建筑物较近,水电站扩建过程中施工因素及扩建后水库水位上升对古滑坡体的稳定影响较大,一旦滑坡体再次启动滑入水库,激起的涌浪对该工程威胁较大。基于潘家铮滑速计算方法,对计算式进行改进,编写了Fortran计算程序,运用改进后的潘家铮滑速计算方法分析了该古滑坡体的加速度、速度的变化规律;分别采用潘家铮涌浪计算方法和水科院经验公式预测了滑坡体入库激起对岸涌浪高度和坝址处涌浪高度,研究成果对工程建设具有指导意义。