高校保卫信息管理系统的设计与实现

为适应目前高校保卫工作的需要，采用数据库系统技术研制开发了“高校保卫信息管理系统”软件，该系统包括学生管理子系统，职工管理子系统，综合查询子系统和特殊管理子系统。能够全面高效地对全校人员，重点保卫部位，案件，规章制度等信息进行管理。     

如何上好初中英语阅读课

该文在素质教育的基础上，就如何上好一堂有效率的初中英语阅读课进行了分析，该文从三个大方向上进行了探索，从理论结合实际的前提下，提出了一些技巧和实施步骤。     

安全执行力内涵辨析及量化方法研究

“执行”是一个复杂的与实践行为相关的过程,在政治学、管理学、社会学等学科使用频繁。在安全领域,实现安全状态的工作过程靠“执行”。本文立足于安全科学的理论层面,首先,以“执行力”为基础,引申出安全执行力的定义,对其进行必要的解释。其次,在安全执行力定义的基础上,阐释安全执行力的特征与执行过程,从而深入理解安全执行力的内涵。最后,从人员素质与客观环境两方面出发,构建了企业员工安全执行力的评估指标并简要阐释其内涵,选用模糊综合评价方法评估企业员工安全执行力的效果。研究表明,高水平的安全执行力能够促进安全工作的顺利进展,对企业提升安全管理水平有一定的意义。     

基于FAHP和功效系数法的土地利用规划实施评价研究——以广西宁明县为例

本文依据土地利用规划实施影响因素建立指标体系,使用模糊层次分析法确定指标权重,结合功效系数法和障碍因子模型,以广西宁明县第三轮土地利用总体规划为例,对其2006年至2012年的实施成效展开评价研究和障碍因子诊断分析。研究表明:(1)2006—2012年,宁明县第三轮土地利用总体规划实施成效评价的总功效系数值为78.61,处于较为良好状态。(2)影响规划实施成效主要的障碍因子有:新增建设用地执行率、与其他规划协调程度、公众参与度、城乡建设用地规模、公众满意度、城镇工矿用地占城乡建设用地比例、剩余新增建设用地满足需求比率、重大项目执行率和人均农居点用地下降程度。     

基于VMware和Ghost技术的系统备份与还原的设计与实现

计算机操作系统经常会因为病毒、木马、误操作等原因造成系统崩溃与数据丢失. 对VMware 虚拟机和Ghost技术进行研究,实现了在VMware虚拟机环境下,利用Ghost技术,对虚拟机系统进行备份,在系统出现崩溃的情况下成功还原系统与数据,保证了系统的安全.     

Numerical performance of parallel group explicit solvers for the solution of fourth order elliptic equations

Many applications in applied mathematics and engineering involve numerical solutions of partial differential equations (PDEs). Various discretisation procedures such as the finite difference method result in a problem of solving large, sparse systems of linear equations. In this paper, a group iterative numerical scheme based on the rotated (skewed) five-point finite difference discretisation is proposed for the solution of a fourth order elliptic PDE which represents physical situations in fluid mechanics and elasticity. The rotated approximation formulas lead to schemes with lower computational complexities compared to the centred approximation formulas since the iterative procedure need only involve nodes on half of the total grid points in the solution domain. We describe the development of the parallel group iterative scheme on a cluster of distributed memory parallel computer using Message-Passing Interface (MPI) programming environment. A comparative study with another group iterative scheme derived from the centred difference formula is also presented. A detailed performance analysis of the parallel implementations of both group methods will be reported and discussed.     

An alternative globalization strategy for unconstrained optimization

We propose a new globalization strategy that can be used in unconstrained optimization algorithms to support rapid convergence from remote starting points. Our approach is based on using multiple points at each iteration to build a sequence of representative models of the objective function. Using the new information gathered from those multiple points, a local step is gradually improved by updating its direction as well as its length. We give a global convergence result and also provide the parallel implementation details accompanied with a numerical study. Our numerical study shows that the proposed algorithm is a promising alternative as a globalization strategy.     

Impact of the fourth‐order compact difference scheme on computational properties of 3D grids in a nonhydrostatic model

To investigate the potential of the fourth‐order compact difference scheme within the specific context of numerical atmospheric models, a linear baroclinic adjustment system is discretized, using a variety of candidates for practically meaningful staggered 3D grids. A unified method is introduced to derive the dispersion relationship of the baroclinic geostrophic adjustment process. Eight popular 3D grids are obtained by combining contemporary horizontal staggered grids, such as the Arakawa C and Eliassen grids, with optimal vertical grids, such as the Lorenz and Charney‐Phillip (CP) grids, and their time‐staggered versions. The errors produced on the 3D grids in describing the baroclinic geostrophic adjustment process relative to the differential case are compared in terms of frequency and group velocity components with the elimination of implementation error. The results show that by utilizing the fourth‐order compact difference scheme with high precision, instead of the conventional second‐order centered difference scheme, the errors in describing baroclinic geostrophic adjustment process decrease but only when using the combinations of the horizontally staggered Arakawa C grid and the vertically staggered CP or the C/CP grid, the time‐horizontally staggered Eliassen (EL) grid and vertically staggered CP or the EL/CP grid, the C grid and the vertically time‐staggered versions of Lorenz (LTS) grid or C/LTS grid, EL grid and LTS grid or EL/LTS grid. The errors were found to increase for specific waves on the rest grids. It can be concluded that errors produced on the chosen 3D grids do not universally decrease when using the fourth‐order compact difference scheme; hence, care should be taken when implementing the fourth‐order compact difference scheme, otherwise, the expected benefits may be offset by increased errors. Copyright © 2008 John Wiley & Sons, Ltd.     

执行误区的分析及思考

执行是一套系统化的流程，在剖析执行问题的根源时，需要全面冷静的思考。就常见的几个与执行力相关的概念做了区别和分析，并给出相应的建议。