台州城市水环境治理措施

分析了水环境在城市发展中的地位和作用,重点对台州市的水环境现状以及水环境恶化的原因进行了详细的分析和探讨。在此基础上,对台州城市水环境治理提出了建设性的建议和科学的水务规划。主张树立“三个战略理念”;关注“四个问题”;实施“四项工程”;建立“水务一体化”制度。并通过实施水环境综合治理工程,提高用水安全,提升城市品位。     

切实做好仪器设备计划编制管理

编制仪器设备购置计划是高校仪器设备管理工作的一个重要组成部分,本文从实验室常规设备、大型仪器设备和控购设备三方面浅谈高校仪器设备计划的编制管理。     

基于两层规划的电力系统N-K故障分析方法

传统的电力系统N-K故障分析一般采用组合遍历的方式,存在故障组合数量大、计算效率低的缺点。文中建立了此类问题的两层规划模型,通过寻优方式确定造成电网损失最大的故障组合。上层问题在故障重数给定的条件下,寻求能够引起电网切负荷量最大的故障组合。下层问题则针对上层问题决策的故障组合,模拟电网事故后的运行情况,在满足电网各类运行约束的条件下,通过调整发电机组输出功率最小化电网切负荷量,进一步给出了模型的遗传算法求解流程。最后,通过IEEE-14节点和IEEE-118节点算例系统,对模型有效性进行了验证。     

发输电设备检修优化决策系统设计与应用

为统筹优化电网生产运行中发输电设备检修计划安排,设计发输电设备检修优化决策系统。基于智能电网调度技术支持系统(D5000),并结合发输变电检修、负荷预测等多源信息自动生成计划方式。在此基础上,采用多类调度计划安全校核滚动计算方法来对计及电网安全稳定的发输变电检修进行优化,实现检修停电计划优化调整和电网供电能力评估,在满足电网安全可靠供电的基础上,优化发输变电检修日程,降低网损,提高电网运行经济性。系统自投入电网调度生产运行以来,实现了年/月发输变电检修计划的优化编制,提高了电网安全经济运行水平和生产效率。     

基于PDM的项目管理研究

项目管理在现代企业工程中占有重要地位。项目可分解为子项目，子项目又可分解为一系列相关的任务，这些任务可以借助产品数据管理(PDM)中的工作流机制自动实现。项目管理就是保证各项任务按照项目进度顺利实现。这里分析了项目管理和过程管理集成的层次，对项目管理的内容做了初步探讨，并提供一个基于BITPDM项目管理的案例。     

机构创意设计实践教学的探讨

结合课程教学改革及实际教学实践 ,介绍了机构创意设计的思路和方法。在培养学生创造性思维和动手能力的实践中取得了良好的教学效果。     

考虑安全约束及电量执行的年度发电与检修联合优化模型

针对年度发电计划与年度检修计划在系统发电能力、电网潮流约束等方面具有强耦合性的特点,构建了考虑安全约束及月度电量执行的年度发电与检修联合优化模型。年度发电计划模型以天为计算时段,提出以历史负荷率统计与正备用约束选择相结合的电量估算方法,降低了计划规模,提升了优化效率。为充分考虑检修对电网运行的影响,通过引入支路开断潮流分布因子,在优化模型中可同时考虑发电计划与检修计划对潮流的综合影响,提升发电计划和检修计划的联合优化能力。将所提模型运用于中国某省的实际电网,验证了其有效性。     

Markov game modeling of mimic defense and defense strategy determination

Network mimic defense technology enhances the robustness of active defense through the redundancy,dynamic and diversity as well as the decision feedback mechanism.However,little work has been done for its security assessment and existing classic game models are not suitable for its dynamic characteristics and lack of universality.A Markov game model was proposed to analyze the transfer relationship between offensive and defensive status and the measurement method of safety and reliability of mimic defense,and calculated the offensive and defensive game equilibrium through non-linear programming algorithm to determine the best defensive strategy considering performance.Experiments give a comparison with the multi-target hiding technique and shows that the mimic defense has a higher defensive effect.Combining with the specific network case,the specific attack and defense path for the exploit of the system vulnerability is given and the effectiveness of the defense strategy algorithm is verified.     

Research on the Evaluation System of Epoxy Asphalt Steel Deck Pavement Distress Condition

环氧沥青钢桥面铺装破损状况评价体系研究

张辉^1,2;李英涛³;付新新²;潘友强²

（1. 南京航空航天大学 航空学院,南京 210016;

2. 江苏中路工程技术研究院有限公司,南京211800;

3. 江苏高速公路工程养护技术有限公司,南京,210049）

创新点说明

1）本文选用江苏省内悬索桥和斜拉桥为研究对象,对其病害破损方式进行对比,并对省内几座跨江大桥的铺装层病害与正交异性桥面板结构进行协同分析。

2）本文基于《公路技术状况评定标准》（JTG H20-2007）,建立环氧沥青钢桥面铺装病害破损状况的相关评价指标,主要包括SDPCI（钢桥面铺装破损状况）、PDR（脱空率）、PCR（裂缝率）等。

3）建立环氧沥青钢桥面铺装与钢箱梁结构一体化的多维度网格化协同评价体系,横向按照不同车道的左、中、右轮迹带进行划分区间,纵向按照缆索（桥跨）进行划分区间。

4）根据桥面使用性能网格化分区评价结果,并基于充分利用桥面铺装剩余性能的考虑,进行桥面分段养护的方案决策,包括小修保养、预防性养护、大中修等。

关键词：钢桥面铺装;环氧沥青混凝土;破损状况;评价体系;养护决策

     

Optimizing discrete point sample patterns and measurement data analysis on internal cylindrical surfaces with systematic form deviations

Selection of an appropriate sampling strategy and of the correct fitting algorithm are two of the key issues in the practice of modern coordinate metrology. A recent report described the development of new techniques for modeling the form errors of machined part features and illustrated their use in identifying and understanding the relation of form errors to machining process variables. In this report, these mathematical tools are further developed and applied for the determination of optimum, reasonably-sized probing patterns for measurement under time and economic constraints. The focus of the work reported here is on full internal cylindrical surfaces. The technique is, however, of general utility and can be employed with any nominal feature geometry. Its application does, in many cases, produce significant improvements in the uncertainty of derived geometric dimensioning and tolerancing parameters with modest or no increase in measurement time. In contrast to most work on these problems, extensive use is made of process-dependent information in selection of sampling protocol and data analysis method. Since the method begins with an understanding of the form errors introduced into the part by the particular manufacturing regime, at least partial benefit can be seen even when the sample pattern optimization is employed in conjunction with commercial, off-the-shelf CMM control and data analysis software.