An Interval Fuzzy Multiobjective Watershed Management Model for the Lake Qionghai Watershed, China

Integrated watershed management is required to ensure the reasonable use of resources and reconcile interactions among natural and human systems. In the present study, an interval fuzzy multiobjective programming (IFMOP) method was used to solve an integrated watershed management problem. Based on system analysis, an IFMOP model suitable for a lake watershed system {IFMOPLWS} was developed and applied to the Lake Qionghai watershed in China. Scenario analysis and an interactive approach were used in the solution process. In this manner, various system components were incorporated into one framework for holistic consideration and optimization. Integrality and uncertainty, as well as the multiobjective and dynamic characteristics of the watershed system, were well addressed. Using two scenarios, two planning schemes were generated. Agriculture, tourism, macroeconomics, cropland use, water supply, forest coverage, soil erosion, and water pollution were fully interpreted and compared to identify a preferable planning alternative for local agencies. This study showed that the IFMOPLWS is a powerful tool for integrated watershed management planning and can provide a solid base for sustainable watershed management.     

关于Vague集的模糊熵及其构造

本文分析了Vague集的性质,给出了将Vague集变换为Fuzzy集的转换函数,并讨论了其性质。分析了关于Vague集的模糊熵的直观特性,在此基础上我们给出了Vague集的模糊熵的定义。最后给出了一个关于Vague集的模糊熵的构造方法。     

220kV线路高频纵联保护在非全相再故障条件下的分析与研究

通过对非全相运行状态时各序分量进行了详细的分析,明确了非全相运行状态对线路高频纵联保护各种功能的影响以及在这种特殊运行情况下保护应当考虑的主要问题。同时结合现场实例分析,进一步论述高频纵联保护装置在非全相运行状态下的动作行为,更加清晰保护的动作逻辑,并加深了解非全相故障的特点。     

Preparation and spectral analysis of gold nanoparticles using magnetron sputtering and thermal annealing

Gold(Au) nanoparticles were prepared on Au-fi lm-coated K9 glass and silicon substrates by direct current(DC) magnetron sputtering and thermal annealing treatment. The effects of substrate material, annealing temperature, and time on morphologies of Au nanoparticles were investigated, and the formation mechanism of Au nanoparticles was discussed. The experimental results indicate that silicon substrate is more suitable for the formation of Au nanoparticles. On a silicon substrate, Au nanoparticles formed with good spherical shapes at temperature over 700 ℃. It was also found by spectral analysis that the fi eld enhancement factor of the island-shaped Au particles was smaller than that of the granular Au particles; the better the spherical shape as well as the smaller the size and spacing of Au particles, the higher the light absorption rate; the absorption peak had a red shift with increasing particle size and spacing.     

Sliding mode control for multi-agent systems under a time-varying topology

This paper addresses the tracking problem of a class of multi-agent systems under uncertain communication environments which has been modelled by a finite number of constant Laplacian matrices together with their corresponding scheduling functions. Sliding mode control method is applied to solve this nonlinear tracking problem under a time-varying topology. The controller of each tracking agent has been designed by using only its own and neighbours’ information. Sufficient conditions for the existence of a sliding mode control tracking strategy have been provided by the solvability of linear matrix inequalities. At the end of this work, numerical simulations are employed to demonstrate the effectiveness of the proposed sliding mode control tracking strategy.     

基于有限域上正交矩阵构造最佳扩散函数

研究有限域GF(28)上线性变换对应的正交矩阵具有最佳分支数的判定问题,得到若干相关结果,由此提出了筛选分支数最佳正交矩阵的算法,并使用c语言进行了编程实现。通过从4阶方阵空间内抽取一部分进行穷举搜索,搜索2×316个方阵并一一进行构造和筛选,最终找到4784479个具有最佳分支数5的4阶正交无零元方阵。     

极端热环境热应力研究指标及评价

极端热环境是某些特殊条件下人所处的恶劣环境,对极端热环境的研究和评价涉及到劳动安全和工作的可靠性。热应力是人体所承受极端热环境的一种程度上的描述。对湿球黑球温度,Sreq指数和ISO9886标准的生理指标等五种极端热环境指标的使用方法和特点进行了分析与评价,对这些指标使用的局限性进行了讨论。认为对极端热环境的研究,应联合使用不同指标后进行综合评价,并重点考虑人体生理反应的变化,使研究工作具有更加普遍的意义和实用性。为此,提出了对极端热环境评价体系研究工作的建议和今后的工作方向。     

军用软件配置管理的实施

软件配置管理是通过技术或行政手段对软件产品及其开发过程和生命周期进行控制、规范的一系列措施.结合军用软件的特点提出一套软件配置管理实施流程,重点阐述如何制定软件配置管理计划、建立软件配置管理库、配置标识、版本控制、基线管理、变更控制、配置审核和配置管理记录等实践活动.     

一种改进的系统间隐私保持协同过滤推荐算法

针对系统间协同过滤推荐过程中的隐私泄露问题,以RSA公钥密码系统和安全多方计算SMC理论为基础,提出一个安全计算模型SCM,将安全计算模型SCM应用到系统间协同过滤中,得到一个有效的隐私保持协同过滤推荐算法。算法利用安全矢量积计算用户的相似度,防止了第三方的恶意串通。实验表明,该算法不但可以保护用户的隐私不泄露给协同合作的系统,而且提高了推荐算法的精度,特别是对用户数据稀疏的小站点。     

BIM技术在中国铁物大厦项目施工阶段综合应用

本文结合工程实践,从BIM技术在工程土建、钢结构、机电、幕墙等各专业的应用入手,结合BIM平台化技术,融合VR技术、全息投影技术、二维码技术、进度质量安全协同管理技术等,探索BIM在大型城市综合体项目施工阶段的综合应用能力,以期BIM技术更好地与项目建设相结合,提升工程深化设计过程中的精细化、仿真化程度,解决施工中各生产要素管理过程中存在的以一系列重难点问题,服务工程建造全过程,进一步提升项目信息化技术水平,助推项目管理更上一层楼。