多管齐下,氧化铁行业冲破困境,再图新机

概述了国内氧化铁行业面对金融危机的冲击,利用多种举措充分挖潜、开发新品,在以人为本的方针下扭转行业颓势,步入健康发展的快车道的总趋势。     

Deployment strategy for static chargers in WRSN

The traditional deployment strategy of static chargers in wireless rechargeable sensor networks (WRSN) covers all the area.The basic idea is to cover all the positions of nodes.A mathematical model of distance between a charger and the farthest node was established,the relationship between the number of nodes and the mathematical expectation of minimum radius of charging was analyzed,and deployment strategy for static chargers was proposed.The method based on the locations of all nodes that need to be charged in the area,used the smallest enclosing circle (SEC) algorithm and finds the optimal location of the charger through Euclidean delivery boy algorithm.It will decrease charging radius,reduce the minimum required transmitted power,thereby saving the average charging energy consumption.The experimental results demonstrated that the less the number locations that the nodes existed,the more energy will be saved.     

Robust capacitated facility location model for acquisitions under uncertainty

We study a new robust formulation for strategic location and capacity planning considering potential company acquisitions under uncertainty. Long-term logistics network planning is among the most difficult decisions for supply-chain managers. While costs, demands, etc. may be known or estimated well for the short-term, their future development is uncertain and difficult to predict.A new model formulation for the robust capacitated facility location problem is presented to cope with uncertainty in planning. Minimizing the expectation of the relative regrets across scenarios over multiple periods is the objective. It is achieved by dynamically assigning multi-level production allocations, locations and capacity adjustments for uncertain parameter development over time. Considering acquisitions for profit maximization and its supply-chain impact is new as well as the simultaneous decision of capacity adjustment and facility location over time. The solution of the novel robust formulation provides a single setup where good results can be achieved for any realized scenario. Hence, the solution may not be optimal for one particular scenario but may be good, i.e. the highest expected profit to gain, for any highly probable future realization. We show that robust mixed-integer linear programming model achieves superior results to the deterministic configurations in exhaustive computational tests. This dynamic robust formulation allows the supply-chain to favorably adapt to acquisitions and uncertain developments of revenue, demand and costs and hence reduces the potential negative impacts of uncertainty on supply-chain operations.     

论加强水工工程建筑质量策略

目前,我国的水利事业呈现出稳定健康的发展态势。因此,为了提高水工建设工程的社会效益和经济效益,必须重视水工建设的施工质量。本文通过分析水工工程中常见的质量问题、主要成因,提出了相应的施工和管理措施,以供同行借鉴。     

生态技术策略在建筑设计作品中的应用实例研究

本文阐述了建筑设计的生态概念,进而对生态技术策略的应用原则展开了分析。最后,结合英国首都标志性建筑——伦敦市政厅的建筑设计要点,分析了生态技术策略在这一成功的绿色建筑商的应用。     

基于积分状态预测的Anti-Windup PID控制器设计

目前有多种方式用来抑制调速系统中调节器饱和引起的Windup现象。其中跟踪反计算控制策略,由于其采用线性反馈作用原理来减小调节器饱和时的积分累加值,因此对于这种策略的研究和应用较多。但由于在设计调节器参数时,没有考虑速度指令和负载的变化,固定的反计算参数一般难以在大范围内保证系统响应的一致性。为了在不同速度指令和负载转矩条件下,保证系统响应的一致性,本文提出了积分状态预测Anti-Windup策略来减小系统由于饱和现象而引起的性能下降,根据速度指令和负载转矩的变化,在调节器饱和时计算出积分器在系统稳态积分终值,并将其作为调节器进入线性段的积分初始值,当系统参数精确时使得系统呈现出最优的速度响应曲线。本文在相同的电流环和速度环调节器PI参数的条件下,进行了仿真实验,比较了上述AW策略与传统方法的速度响应性能。实验结果验证了理论分析及仿真波形的正确性。     

基于职业倦怠背景下的高校教学人员的心境管理研究

本文以心境与职业倦怠的关系为切入点,深入分析目前普遍存在的高校教学人员职业倦怠现象,指出这是严重影响高校教学管理质量和效益的现实问题,进而提出以人为本,尊重事实;完善机制,调整岗位;准确定位,调节心态;越过＂拐点＂,走出困境是缓解职业倦怠的主要良策和途径。     

建筑工程造价中材料及设备的成本控制策略

主要针对建筑工程造价中材料及设备价格控制方面进行了研究和分析，并提出了相应措施，指出建筑工程造价材料及设备价格的成本控制在建筑工程中有着重要的作用，对提高企业经济效益和管理水平都将发挥积极作用。     

基于“四位一体”的数控车中级工考证课程的教学策略研究

采用了文献研究法、调查研究法以及行动研究法,通过研究过程发现并提出适用于数控车床中级工考证课程的教学策略包括分层分组教学、引入微课、自动编程软件、仿真软件等信息化教学策略、引入竞赛学生作为助教实现学教赛研四融合。     

溪洛渡-浙江±800 kV特高压直流输电工程直流保护 系统实施策略及其仿真试验研究

介绍了首次应用于特高压直流输电工程的DPS-3000平台,分析了基于此平台的直流保护系统的整体设计方案、测量系统设计方案、保护功能配置方案和辅助功能设计方案。介绍了国内首个以厂家为主的二次系统仿真试验情况,对试验中发现的关键技术问题进行分析并提出解决策略。二次系统仿真试验验证了直流保护系统实施方案及其性能满足设计规范书要求,为溪浙特高压直流输电工程的现场调试工作和顺利投产奠定了坚实的基础。