自动网格法测试系统的实验检验

在用自动网格法做大模型试验之前，先做了一个刚体移动实验对自动网格法测试系统进行了标定。在一张纸上生成网格点，将纸固定在平移台上，再将平移台放在防震台上。平移台的移动由带有刻度的螺拴控制。网格点每移动一步，用CCD摄像机拍下网格点，用专用程序提取位移信息。通过标定，认为这套测试系统是可行的。最后讨论了影响本次精度的因素。     

基于均匀网格的自适应密度快速聚类算法

提出了一种基于均匀网格的自适应密度快速聚类新算法．首先引入均匀网格和边界网格概念,然后给出了网格均匀度的计算方法和自适应网格划分技术．每次聚类都从均匀度最高的网格开始逐步向周围扩展均匀网格,直到遇到边界网格为止．算法除具有一般网格聚类算法的优点外,还能自适应地发现不同密度的类及其边界,能够有效地识别孤立点并具有较好的扩展性．最后,通过实验验证了该算法的有效性．     

优化网格服务请求的QoS 性能

Workload of each service class varies dynamically in the grid environment,making the static service pool size allocation scheme unable to guarantee the QoS requirement of each service class.In this paper,we link the issue of dynamical service pool size allocation scheme with QoS requirement under the varying workload,and formulate the QoS performance of service requests in the grid environment by queue theory.Combined Lagrangian optimization with a bisearch approach,the problem of optimally allocating service pool size scheme is resolved.Simulation results Show efficiency of the optimal service pool size allocation scheme.     

Exploring teachers’ meta-strategic knowledge of science argumentation teaching with the repertory grid technique

ABSTRACT

This study investigated two science teachers’ meta-strategic knowledge (MSK) of argumentation teaching by applying the repertory grid technique (RGT). One teacher was a novice, while the other was experienced in teaching argumentation. Using the RGT, we elicited the objectives and strategies of the two teachers regarding their argumentation teaching involving two social scientific issue (SSI) scenarios. The results showed that the experienced teacher had more varied and organised MSK for teaching argumentation than the novice teacher. Meanwhile, the novice teacher indicated a belief that the learning of argumentation should occur in a more student-centred manner, rather than relying on a traditional lecture-based environment. Consequently, she spent a considerable amount of time engaging students with their peers’ ideas through discussion and collaboration. On the other hand, the experienced teacher noticed that most of students had the ability to generate arguments, but that few knew how to argue based on evidence. Therefore, she helped students to collect data from various resources and suggested that they construct their own knowledge framework in order to improve students’ ability to incorporate their understanding of scientific knowledge into scientific argumentation.     

基于有限差分法的一维输运方程定解问题

许多物理方程的定解问题,如波动方程、输运方程等,或由于其泛定方程比较复杂,或由于边界形状比较复杂,或由于其它原因,往往不具有解析解,或者其解析解不易计算,所以要采用可行的数值解法。有限差分方法就是一种数值解法,它把表示变量连续变化关系的偏微分方程离散为有限个代数方程,然后利用电子计算机求解此线性代数方程组。     

触电人身损害赔偿纠纷的管控--以贵州A供电局为对象

电网企业法律案件纠纷的数量,基本上呈现逐年较快增长的趋势。其中,触电人身损害赔偿纠纷占总案件纠纷将近一半。这凸显触电人身损害赔偿纠纷的管控迫在眉睫、重于泰山。针对违章建筑、高压作业经营及钓鱼竿等三类触电人身损害赔偿纠纷,电网企业、电力监管部门、规划部门应有效地采取相应的管控措施,最大程度减少触电人身损害赔偿纠纷的发生。     

基于CIM的电网冰灾异常故障特征节点检测算法

随着我国国民经济的飞速发展,电力工业起到了举足轻重的地位,许多地区的输电线路由于冰灾覆冰严重影响了输电线路的可靠性,易造成设备的损坏甚至是危及生命安全。为此,提出基于CIM的电网冰灾异常故障特征节点检测算法,通过对冰雪环境下产生的电网故障,建立CIM微电网系统的异常故障模块进行故障分析,经由微电网环境下电网异常故障分析数据模块将异常数据进行故障特征节点检测并计算的过程。仿真实验表明,基于CIM的电网冰灾异常故障特征节点检测算法,能够有效的提高冰灾异常故障检测的准确性、抗干扰能力强并且在长时间检测过程中,分析速度快,预防能力性强。有效地为电网安全高效运行提供更好的保障。     

基于分层结构CIM网格资源发现和导纳策略

为了解决分层结构基础上网格领域资源发现费用过高的问题,本文提出基于综合指数法(CIM)的网格资源发现与导纳方面的策略,它是一种基于分层结构的网格模型,通过网格工作的执行成本和执行时间综合考虑,对主动声明加入网格的资源的状态从多个属性角度做出综合评价。在顺利进行资源发现的前提下,该策略通过创建相应的次网格来减少网格工作的开支。通过模拟实验环境对其可行性和有效性进行验证。实验结果表明提出的策略可实现计算费用和能力的优化。     

CASS在场地平整土方计算中的应用

在工程实践中如何根据实际情况选择适当的方法计算土方,使用怎样的计算软件,对土方计算都是十分关键的环节。为保证土方计算的准确性,结合应用实例利用CASS软件中方格网法和DTM法进行场地平整土方对比计算。     

Performance investigation of 2D lattice Boltzmann simulation of forces on a circular cylinder

The lattice Boltzmann method (LBM) is employed to simulate the uniform flow past a circular cylinder. The performance of the two-dimensional LBM model on the prediction of force coefficients and vortex shedding frequency is investigated. The local grid refinement technique and second-order boundary condition for curved walls are applied in the calculations. It is found that the calculated vortex shedding frequency, drag coefficient and lift coefficient are consistent with experimental results at Reynolds nu...